Claims:I/We Claim:

1. A saddle type vehicle (200) comprising:
a frame structure (300) comprising a head tube (301) and a main frame (302) extending rearwardly from the head tube (301), and
a prop stand sub-assembly (304), the prop stand sub-assembly (304) comprising a prop stand tube (405), at least one prop stand mounting bracket (404), and at least one prop stand integrating unit (406) operably connected to each other, wherein the at least one prop stand integrating (406) unit is connected to one of a plurality of cross members (402) of the frame structure (300).
2. The saddle type vehicle (200) as claimed in claim 1, wherein the plurality of cross members of the frame structure (300) comprise a first cross member (401) connecting a top portion of at least one down tube (307, 309) and a second cross member (402) connecting a bottom portion of the at least one down tube (307, 309).
3. The saddle type vehicle (200) as claimed in claim 2, wherein the at least one prop stand integrating unit (406) comprises a central receiving portion (601) for receiving a laterally extending end (402a) of the second cross member (402).
4. The saddle type vehicle (200) as claimed in claim 3, wherein the at least one prop stand integrating unit (406) includes an extending body portion (602) comprising at least one mounting provision (603) on either sides of the central receiving portion (601).
5. The saddle type vehicle (200) as claimed in claim 4, wherein the extending body portion (602) of the at least one prop stand integrating unit (406) comprises a front bracket (602a) and a rear bracket (602b) forming a box-type structure.
6. The saddle type vehicle (200) as claimed in claim 5, wherein the central receiving portion (601) of the at least one prop stand integrating unit (406) connects the extending body portion (602) and the laterally extending end (402a) of the second cross member (402) and extends from the rear bracket (602b) laterally inwards towards the frame structure (300), when the prop stand sub-assembly (304) is mounted on the frame structure (300).
7. The saddle type vehicle (200) as claimed in claim 1 or 5, wherein the prop stand mounting bracket (404) includes a top portion (702) having at least two top mounting provisions (501) corresponding to the at least one mounting provision (603) of the prop stand integrating unit (406) for mounting the prop stand mounting bracket (404) to the prop stand integrating unit (406), and a bottom portion (703) having at least one mounting provision (701) for coupling the prop stand tube (405) with the prop stand integrating unit (406).
8. The saddle type vehicle (200) as claimed in claim 7, wherein the central receiving portion (601) of the at least one prop stand integrating unit (406) and the at least one mounting provision (701) of the bottom portion (703) of the prop stand mounting bracket (404) are collinear, when the prop stand sub-assembly (304) is mounted on the frame structure (300).
9. The saddle type vehicle (200) as claimed in claim 7, wherein the at least two top mounting provisions (501) of the prop stand mounting bracket (404) and the central receiving portion (601) of the at least one prop stand integrating unit (406) form a top triangle.
10. The saddle type vehicle (200) as claimed in claim 7, wherein the at least two top mounting provisions (501) and the at least one mounting provision (701) of the bottom portion (703) of the prop stand mounting bracket (404) form a bottom triangle.
11. The saddle type vehicle (200) as claimed in claim 7, wherein the bottom portion (703) of the prop stand mounting bracket (404) is inclined at an angle substantially equal to 45° with respect to the top portion (702).
12. The saddle type vehicle (200) as claimed in claim 2, wherein the first cross member (401) mounts rider footrest assemblies (306) of the saddle type vehicle (200).
13. The saddle type vehicle (200) as claimed in claim 2, wherein the second cross member (402) mounts a centre stand sub-assembly (305) of the saddle type vehicle (200).The saddle type vehicle (200) as claimed in claim 2, wherein the first cross member (401) and the second cross member (402) lie in a common vertical plane (YY’), when seen in a vehicle side elevation view.
14. The saddle type vehicle (200) as claimed in claim 14, wherein a ratio of a longitudinal length (a) of the vehicle (200) and a distance between the common vertical plane (YY’) passing through the first cross member (401) and the second cross member (402) and a front wheel (204) axle (b) is approximately 2:1.
15. .The saddle type vehicle (200) as claimed in claim 2, wherein the at least one down tube is a left-side rear down tube (307) and a right-side rear down tube (309) extending downwardly from a rear bending portion (308) of the main frame (302),
16. The saddle type vehicle (200) as claimed in claim 16, wherein the left-side rear down tube (307) and the right-side rear down tube (309) are laterally separated by a predetermined distance forming an accommodation space there between.
17. The saddle type vehicle (200) as claimed in claim 16, wherein the frame structure (300) further comprises at least one top power unit mounting bracket (310) positioned proximal to the top portion of the left-side rear down tube (307) and the right-side rear down tube (309) and at least one bottom power unit mounting bracket (311) positioned proximal to the bottom portion of the left-side rear down tube (307) and the right-side rear down tube (309).
18. The saddle type vehicle (200) as claimed in claim 1, wherein the prop stand tube (405) is coupled to the prop stand mounting bracket (404) with a U-shaped bracket (408).
19. The saddle type vehicle (200) as claimed in claim 1, wherein a ratio of distance between a prop stand tube ground resting point (F) and a vertical plane (OB) passing through a longitudinal centre (O) of the saddle type vehicle (200) (FE) and distance between a prop stand tube mounting point (G) and the vertical plane (OB) of the saddle type vehicle (200) (GD) is approximately 2:1.
20. The saddle type vehicle (200) as claimed in claim 1, wherein an angle formed by a prop stand tube mounting point (G) with respect to a vertical plane (OB) passing through a longitudinal centre (O) of the saddle type vehicle (200) (angle (GCD)) is substantially same as an angle formed by an extrapolated prop stand ground resting point (A) with respect to the vertical plane (OB) of the saddle type vehicle (200) (angle (CAB)).
21. The saddle type vehicle (200) as claimed in claim 21, wherein the angle formed by the prop stand tube mounting point (G) with respect to the vertical plane (OB) passing through a longitudinal centre (O) of the saddle type vehicle (200) (angle (GCD)) and the angle formed by an extrapolated prop stand ground resting point (A) with respect to the vertical plane (OB) of the saddle type vehicle (200) (angle (CAB)) are approximately 45°.
22. The saddle type vehicle (200) as claimed in claim 1, wherein a vertical plane extends from a longitudinal centre (O) of the saddle type vehicle (200) to a ground plane (B) and wherein a ratio of a distance between the longitudinal centre (O) of the saddle type vehicle (200) and the ground plane (B) and a distance between the longitudinal centre (O) of the saddle type vehicle (200) and a centre of axle (C) of a rear wheel (205) is approximately 2:1.
23. A saddle type vehicle (200) comprising:
a frame structure (300) comprising a head tube (301) and a main frame (302) extending rearwardly from the head tube (301), and
a prop stand sub-assembly (304), the prop stand sub-assembly (304) comprising a prop stand tube (405) and at least one prop stand mounting bracket (404) operably connected to each other, wherein the at least one prop stand mounting bracket (404) is attached to a bottom engine mounting bracket (311) of the frame structure (300) with a reinforcement member (1001). , Description:TECHNICAL FIELD
[0001] The present subject matter described herein generally relates to a saddle type vehicle, and particularly but not exclusively relates to a prop stand sub-assembly in such a vehicle.
BACKGROUND
[0002] Conventionally, two types of vehicle resting devices are used for placing a two wheeled vehicle in a standing state, namely a prop stand and a centre stand. Both these vehicle resting devices undergo static loading and aid in stability of the vehicle when the vehicle is vertically placed. The prop stand allows a two wheeled vehicle to lean on its left side, when viewed from a rider’s perspective, while the centre stand allows the two wheeled vehicle to be kept upright without leaning against another object. The prop stand is provided for balancing vehicle during vehicle parked condition and is preferred for its quick retraction and ease of application, compared to the centre stand.

BRIEF DESCRIPTION OF THE DRAWINGS
[0003] The detailed description is described with reference to a two wheeled vehicle along with the accompanying figures. The same numbers are used throughout the drawings to reference like features and components.
[0004] Figs. 1A-1C exemplarily illustrate known different configurations of prop stand mounting construction in two-wheeled vehicles;
[0005] Fig. 2 exemplarily illustrates a side view of a two wheeled vehicle, when viewed from left hand side of the rider, in accordance with an embodiment of the present invention;
[0006] Fig. 3 exemplarily illustrates left side elevation view of the frame structure of the vehicle;
[0007] Figs. 4A-4B exemplarily illustrate prop stand sub-assembly attached to the main frame of the frame structure of the vehicle;
[0008] Figs. 5A-5B and Fig. 5C exemplarily illustrate perspective views of the prop stand sub-assembly in different positions of the prop stand tube and a sectional view of the prop stand sub-assembly, respectively;
[0009] Fig. 6A exemplarily illustrates a perspective view and an exploded view of the prop stand integrating unit 406 of the prop stand sub-assembly of the vehicle;
[00010] Fig. 6B exemplarily illustrates a plan view of the prop stand sub-assembly engaging with the frame structure;
[00011] Figs. 7A-7C exemplarily illustrate different perspective views of the prop stand mounting bracket of the prop stand sub-assembly;
[00012] Fig. 8 exemplarily illustrates a front perspective view of the prop stand mounting bracket attached to the prop stand integrating unit;
[00013] Figs. 9A-9B exemplarily illustrate schematic diagrams depicting the location of the prop stand sub-assembly with respect to the frame structure of the vehicle; and
[00014] Fig. 10 exemplarily illustrates a perspective view of an alternate embodiment of a prop stand sub-assembly mounted on the frame structure of the vehicle.
DETAILED DESCRIPTION
[00015] Most modern two wheelers come with both a prop stand and a centre stand. On daily use basis, a rider usually opts for application of the prop stand when compared to the centre stand due to its easy access and simple deployment. The prop stand is typically mounted to the vehicle frame using a prop stand mounting bracket. A pivot shaft extends laterally with respect to the body frame and the prop stand is pivotable about the axis of the pivot shaft. The prop stand in its inclined position must effectively balance the weight of the vehicle in the parked condition and any failure in bearing the weight, could lead to imbalance and toppling of vehicle, causing damage to vehicle parts and also discomfort to the user of the vehicle.
[00016] Figs. 1A-1C exemplarily illustrate known different configurations of prop stand mounting construction in two-wheeled vehicles. The prop stand 104 is mounted to a vehicle frame using a prop stand mounting bracket 103. The engine mounting bracket 102 forms a part of the vehicle frame to which the prop stand mounting bracket 103 may be attached. Based on the different frame structure of the vehicle, the mounting of the prop stand to the frame varies. As exemplarily illustrated in Fig. 1A, the prop stand mounting bracket 103 is welded to the rider foot rest 101. In Fig. 1B, the prop stand mounting racket 103 is welded to the down tube 105 of the vehicle frame. In Fig. 1C, the prop stand mounting bracket 103 is attached to the engine mounting bracket 102 of the vehicle. In both Figs. 1A-1B, the prop stand mounting bracket 103 is subjected to a lot of welding distortions and experiences high vibration at tactile points. In Fig. 1C, overhang due to the configuration of attaching the prop stand 104 to the prop stand mounting bracket 103 causes improper stability of vehicle.
[00017] Further, in all these configurations, the prop stand mounting bracket 103 is of higher thickness than that of the welded frame part, such as the down tube 105 or the engine mounting bracket 102. The frame parts 102, 105 where the prop stand mounting bracket 103 is attached are either tubular in structure or sheet metal structures of lower thickness. When the vehicle is parked using the prop stand 104, the load experienced by the prop stand bracket 103 is transferred to these low thickness frame parts 102, 105, leading to deflection or distortion of the frame parts 102, 105 as well as failure of the welded joint between the prop stand mounting bracket 103 and the frame parts 102, 105. Due to variation in thickness, a large amount of welding distortion at the welded joints is experienced which arises from a poor surface contact between the two members 103 and 102, 105.
[00018] Also, the mounting provisions provided on the prop stand mounting bracket for mounting the prop stand bracket to the frame and mounting the prop stand to the prop stand mounting bracket result in unequal distribution of the load on to the prop stand bracket and an overhang may occur on a side of its surface where the mounting provisions for the prop stand are provided. Due to the overhang in the prop stand mounting bracket caused by the rear axle load of the vehicle, the parking of the vehicle can be unstable and end up in toppling of the vehicle subsequently.
[00019] In other variants of mounting the prop stand, a cross member having high cross section, extending in the width direction of the vehicle, and further extending outwardly is utilized. This configuration tends to add weight due to the extension and also requires modification of an existing frame structure. Moreover, since the extension in the cross member does not facilitate mounting of a footrest assembly, the number of individual mounting parts to mount the foot rest is additional. In yet another variant of mounting the prop stand, a light alloy frame and an abutment stiffening element is attached to the prop stand mounting bracket for reinforcement. However, the stiffener is directly fastened to a sheet metal support in the form of the engine mounting bracket which tends to deform under bending loads.
[00020] Also in some implementations, when reinforcement members are used to stiffen the engine mounting bracket, the manufacturing and assembly time and cost associated with it increases and also reduces the ground clearance for mounting the engine of the vehicle. In some other implementations, the prop stand is attached to a foot rest tube of the vehicle which again requires an additional part such as, the foot rest tube. Also, location of the prop stand in the vehicle needs to be accessible to the rider of the vehicle, not significantly affecting the centre of gravity of the vehicle, and the location of the foot rest in relation to the prop stand needs to be ergonomically friendly to the rider for safe and effortless deployment and release of the prop stand in the vehicle.
[00021] Thus, there exists a need for an improved vehicle design with a prop stand assembly that ensures balanced parking of the vehicle for prolonged durations with proper load distribution and reduced weld distortions to the frame of the vehicle, while also sustaining through numerous cycles of effortless and safe deployment of the prop stand.
[00022] The present subject matter has been devised in view of the above circumstances as well as solving other problems of the known art. The design of the prop stand sub-assembly disclosed here addresses the problems of parking instability causing vehicle imbalance, sliding and toppling effect, improper load distribution of prop stand assembly to frame, weld distortions on frame associated with prop stand bracket, frame members bending during prop stand load application, and poor durability/life of the prop stand assembly.
[00023] A saddle type two-wheeled vehicle with a prop stand sub-assembly is disclosed in an embodiment of the present invention. The saddle type vehicle comprises a frame structure and the prop stand sub-assembly. The frame structure comprises a head tube and a main frame extending rearwardly from the head tube. The prop stand sub-assembly comprises a prop stand tube, at least one prop stand mounting bracket, and at least one prop stand integrating unit operably connected to each other. The at least one prop stand integrating unit is connected to one of a plurality of cross members of the frame structure.
[00024] The plurality of cross members comprise a first cross member connecting a top portion of at least one down tube and a second cross member connecting a bottom portion of the at least one down tube. The frame structure is supported by a front wheel and a rear wheel of the vehicle. The at least one down tube is a left-side rear down tube and a right-side rear down tube extending downwardly from a rear bending portion of the main frame.
[00025] In an embodiment, the left-side rear down tube and the right-side rear down tube are laterally separated by a predetermined distance forming an accommodation space there between. The frame structure further comprises at least one top power unit mounting bracket positioned proximal to the top portion of the left-side rear down tube and the right-side rear down tube and at least one bottom power unit mounting bracket positioned proximal to the bottom portion of the left-side rear down tube and the right-side rear down tube. In another embodiment, the first cross member mounts the rider footrest assemblies of the saddle type vehicle. In yet another embodiment, the second cross member mounts a centre stand sub-assembly of the saddle type vehicle.The at least one prop stand integrating unit comprises a central receiving portion for receiving a laterally extending end of the second cross member. The at least one prop stand integrating unit further includes an extending body portion comprising at least one mounting provision on either side of the central receiving portion. The extending body portion of the at least one prop stand integrating unit comprises a front bracket and a rear bracket forming a box-type structure. The central receiving portion of the at least one prop stand integrating unit connects the extending body portion and the laterally extending end of the second cross member and extends from the rear bracket laterally inwards towards the frame structure, when the prop stand sub-assembly is mounted on the frame structure.
[00026] The prop stand mounting bracket includes a top portion having at least two top mounting provisions corresponding to the at least one mounting provision of the prop stand integrating unit for mounting the prop stand mounting bracket to the prop stand integrating unit, and a bottom portion having at least one bottom mounting provision for coupling the prop stand tube with the prop stand integrating unit. The central receiving portion of the at least one prop stand integrating unit and the at least one mounting provision of the bottom portion of the prop stand mounting bracket are collinear, when the prop stand sub-assembly is mounted on the frame structure. In an embodiment, the at least two top mounting provisions of the prop stand mounting bracket and the central receiving portion of the at least one prop stand integrating unit form a top triangle. In an embodiment, the at least two top mounting provisions and the at least one mounting provision of the bottom portion of the prop stand mounting bracket form a bottom triangle. The bottom portion of the prop stand mounting bracket is inclined at an angle substantially equal to 45° with respect to the top portion. The prop stand tube is coupled to the prop stand mounting bracket with a U-shaped bracket.
[00027] In an embodiment, the first cross member and the second cross member lie in a common vertical plane, when seen in a vehicle side view. In another embodiment, the common vertical plane passing through the second cross member is disposed substantially at a longitudinal centre of the saddle type vehicle. A ratio of a longitudinal length of the vehicle and a distance between the common vertical plane passing through the first cross member and the second cross member and a front wheel axle is approximately 2:1.
[00028] In an embodiment, a ratio of distance between a prop stand tube ground resting point and a vertical plane passing through a longitudinal centre of the saddle type vehicle and distance between a prop stand tube mounting point and the vertical plane of the saddle type vehicle is approximately 2:1.In an embodiment, an angle formed by a prop stand tube mounting point with respect to a vertical plane passing through a longitudinal centre of the saddle type vehicle is substantially same as an angle formed by an extrapolated prop stand ground resting point with respect to the vertical plane of the saddle type vehicle.
[00029] In an embodiment, the angle formed by the prop stand tube mounting point with respect to the vertical plane passing through a longitudinal centre of the saddle type vehicle and the angle formed by an extrapolated prop stand ground resting point with respect to the vertical plane of the saddle type vehicle are approximately 45°. In an embodiment, a vertical plane extends from a longitudinal centre of the saddle type vehicle to a ground plane and wherein a ratio of a distance between the longitudinal centre of the saddle type vehicle and the ground plane and a distance between the longitudinal centre of the saddle type vehicle and a centre of axle of a rear wheel is approximately 2:1.
[00030] Another embodiment of a saddle type vehicle with a frame structure is disclosed, where the prop stand sub-assembly comprising a prop stand tube and at least one prop stand mounting bracket, operably connected to each other. In this embodiment, the at least one prop stand mounting bracket is attached to a bottom engine mounting bracket of the frame structure with a reinforcement member.
[00031] The positioning of the prop stand sub-assembly in accordance with governing ratios facilitates the prop stand cum vehicle stability in parked condition and retracted condition. The proposed design embraces the prop stand integrating unit connecting the prop stand mounting bracket to the frame and is pivoted to either side of the cross member that offers higher structural strength to the frame. In effect the design produces a triangulation effect that can resist bending moment in addition to axial forces. Furthermore, bending stress from the prop stand is received by both collar (bush) and screw member of the prop stand integrating unit, on either side equally, thus any bend in prop stand mounting brackets as stated in prior art, when the prop stand is rotated, is suppressed completely. The box section of the prop stand integrating unit forming a closed loop helps in isolating and reducing deflections, thereby absorbing direct load from the prop stand offering efficient transfer of forces from the load acting on prop stand sub-assembly to the frame.
[00032] The position of the prop stand in its inclination is matched to the vehicle centre of gravity in the longitudinal direction which helps in balancing the vehicle weight between the front and rear axle effectively. The prop stand height is determined with respect to the vertical centre of gravity and the dimension of the tyre where the mounting height to the ground is in the ratio of 1:2 which helps in achieving higher stability during parked condition. The prop stand lean angle- a resultant of a forward angle of about 15° and a retraction angle of about 90° helps to improve its operation and ensures convenience of operation during retraction. As a result, the prop stand can be smoothly and stably rotated, and the durability of the side stand improves. The prop stand sub-assembly can be used as a sub-assembly, reducing weight of frame and packing requirements. Also, a prop stand switch assembly and an engine immobilizer can be integrated with the prop stand mounting bracket for providing an alert and ensuring safety during the operation of prop stand. The design of the prop stand sub-assembly can be deployed in any two-wheeled vehicle requiring prop stand function for balancing the vehicle, when the vehicle is parked. Exemplary embodiments detailing features regarding the aforesaid and other advantages of the present subject matter will be described hereunder with reference to the accompanying drawings. Various aspects of different embodiments of the present invention will become discernible from the following description set out hereunder. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. It should be noted that the description and figures merely illustrate principles of the present subject matter. Various arrangements may be devised that, although not explicitly described or shown herein, encompass the principles of the present subject matter. Moreover, all statements herein reciting principles, aspects, and examples of the present subject matter, as well as specific examples thereof, are intended to encompass equivalents thereof. Further, it is to be noted that terms “upper”, “down”, “right”, “left”, “front”, “forward”, “rearward”, “downward”, “upward”, “top”, “bottom”, “exterior”, “interior” and like terms are used herein based on the illustrated state or in a standing state of the two wheeled vehicle with a driver riding thereon. Furthermore, arrows wherever provided in the top right corner of figure(s) in the drawings depicts direction with respect to the vehicle, wherein an arrow F denotes front direction, an arrow R indicates rear direction, an arrow Up denotes upward direction, an arrow Dw denotes downward direction, an arrow RH denotes right side, and an arrow LH denotes left side. Also, it is to be understood that the phraseology and terminology used herein is for the purpose of description and should not be regarded as limiting.
[00033] Fig. 2 exemplarily illustrates a side view of a saddle type vehicle 200, when viewed from left hand side of the rider while the rider is in riding position, in accordance with an embodiment of the present invention. The saddle type vehicle 200 illustrated is a two-wheeled vehicle that includes a frame structure 300 shown in Fig. 3 to support different parts of the two wheeled vehicle 200. A handlebar 209 is rotatably integrally connected to a steering shaft (not shown). The head tube supports the steering shaft rotatably in a certain range. The handlebar 209 is used to steer the two wheeled vehicle 200 and is connected to a front wheel 204 through the steering shaft (not shown) and a front fork assembly 206. An upper portion of the front wheel 204 is covered by a front fender 216 which prevents mud and water from getting deflected towards the steering shaft. Further, the front fork assembly 206 is supported on the front fender 216 by means of a brace fender
[00034] In a front portion of the body frame, a fuel tank 217 is arranged immediately behind the handlebar 209 and is disposed over a first power source, for example, an engine 219. A seat assembly 210 is placed behind the fuel tank 217. The seat assembly 210 includes a front rider seating portion 211a and pillion rider seating portion 211b. The pillion rider seating portion 211b is placed on the rear part of the frame structure 300, where the rear part of frame structure 300 is covered by the tail cover assembly 203.
[00035] For the safety of the rider and in conformance with the traffic rules, a headlamp unit 212 and a turn signal lamp unit (not shown) are provided in the front portion of the two wheeled vehicle 200. On the rear portion of the two wheeled vehicle 200, a tail lamp 213 and a reflex reflector 218 is provided on the rear portion of the tail cover assembly 203.
[00036] Suspension systems are provided for comfortable steering of the two wheeled vehicle 200 on the road. The front fork assembly 206, which forms the front suspension system, serves as rigidity component just like the frame structure. The front fork assembly 206, clamped to the head tube (not shown) through an upper bracket (not shown) and a lower bracket (not shown), is capable of being moved to the left and right. Further, a rear suspension system 215, which is a hydraulic damped arrangement, is connected to the frame structure 300. The rear suspension system 215 comprises of at least one rear suspension (not shown) preferably disposed centrally in the longitudinal mid plane of the two wheeled vehicle 200. However, in a two wheeled vehicle 200 with two rear suspensions, the same may be disposed on the left side and the right side respectively of the two wheeled vehicle 200.
[00037] The first power source, for example, the engine 219 is mounted to a front lower portion of the frame structure 300 by means of at least one engine mounting bracket (not shown). The engine 219 is equipped with an exhaust system that includes an exhaust pipe (not shown) connected to the engine 219 and a muffler (not shown) connected to the exhaust pipe. The muffler extends rearwards along the right side of the rear wheel 205. Further, a swing arm 207 extending rearwards is swingably connected to a lower rear portion of the frame structure300. The rear wheel 205 is rotatably supported at a rear end of the swing arm 207. Power from the engine 219 is transmitted to the rear wheel 205 through a power drive mechanism, such as a drive chain, so as to drive and rotate the rear wheel 205.
[00038] A rider footrest (not shown) is mounted on by means of add-on mounting structure which is mounted on the frame structure 300. A rear fender 214 for covering an upper side of the rear wheel 205 is mounted to a rear portion of frame structure 300 to prevent mud and water splashed by the rotating rear wheel 205 from entering the muffler, the engine 219 and other parts disposed close by. In the present embodiment since the distance between the rear wheel 205 and the rear fender 214 is large, a second rear fender 202 is provided just above the rear wheel 205. To enhance the overall aesthetics of the two wheeled vehicle 200 and to prevent undesired foreign particles from entering parts of the two wheeled vehicle 200, a plurality of rear covers (not shown) are attached to a rear portion of the frame structure 300. Area below the seat assembly 210 and the fuel tank 217 of the two wheeled vehicle 100 is covered on both sides by a cover frame assembly 201. The cover frame assembly 201 is further connected to frame structure 300 and the tail cover assembly 203.
[00039] Fig. 3 exemplarily illustrates a left side elevation view of the frame structure 300 of the vehicle 200. The front portion of the frame structure 300 includes a head tube 301. The head tube 301 supports the front suspension assembly, which further supports the handle bar 209 in a steerable manner. The central portion of the frame structure 300 includes a main frame 302 that extends rearward from the head tube 301. The frame structure 300 is supported by the front wheel 204 and the rear wheel 205. The main frame 302 further extends rearward and upward as a rear tube 303 to form the rear portion of the main frame 300, which supports other assemblies of the vehicle 200, at the rear portion. The frame structure 300 further comprises a left side rear down tube 307 and a right side rear down tube (not shown) that extend from a rear bending portion 308 of the main frame 302 in a downward direction.
[00040] At the lower portions of each of the down tubes 307, a prop stand sub-assembly 304 and a center stand sub-assembly 305 is attached. Further, in an embodiment, a foot rest assembly 306 is also attached at the lower portions of the down tubes 307. A first cross tube (not shown) is connected at a top portion of the left-side rear down tube 307 and the right-side rear down tube as shown in Fig. 4. A second cross tube (not shown) is connected at a bottom portion of the left-side rear down tube 307 and the right-side rear down tube as shown in Fig. 4. The centre stand sub-assembly 305 and the foot rest sub-assembly 306 are attached to the second cross tube by means of fasteners sandwiched between a pair of brackets.
[00041] Figs. 4A-4B exemplarily illustrate prop stand sub-assembly 304 attached to the main frame 302 of the frame structure 300 of the vehicle 200. Fig. 4A exemplarily illustrates a side perspective view of the prop stand sub-assembly 304 and the Fig. 4B exemplarily illustrates the front cross sectional near the prop stand sub-assembly 304. As exemplarily illustrated, the frame structure 300, in addition to the down tubes 307, 309, comprises a top power unit mounting bracket 310 and a bottom power unit mounting bracket 311. The top power unit mounting bracket 310 and the bottom power unit mounting bracket 311 are split brackets to mount the power unit, for example, the engine 219 to the frame structure 300. In an embodiment, the top power unit mounting bracket 310 and the bottom power unit mounting bracket 311 are formed as a single plate structure extending substantially along the length of the down tubes 307, 309 with mounting provisions at their ends. The power unit mounting brackets 310, 311 are formed in sheet metal and have provisions, such as, holes in them to engage with the engine mounting provisions. The top power unit mounting bracket 310 is welded to the down tubes 307, 309 proximal to the first cross member 401. The bottom power unit mounting bracket 311 is welded to the down tubes 307, 309 proximal to the second cross member 402. The first cross member 401 and the second cross member 402 as exemplarily illustrated are hollow or solid cylindrical structures that extend in the lateral direction of the vehicle 200 between the two down tubes 307, 309. The first cross member 401 is shorter in length compared to the second cross member 402. The ends of the second cross member 402 extend beyond the down tubes 307, 309. The cross members 401, 402 are welded to the down tubes 307, 309 of the frame structure 300 along their length. In an embodiment, the cross members 401, 402 may be fastened to the down tubes 307, 309 by means of fasteners. The material of the cross members 401, 402 may be same as or different from the material of the frame structure 300. The left-side rear down tube 307 and the right-side rear down tube 309 are laterally separated by a predetermined distance forming an accommodation space there between.
[00042] The prop stand sub-assembly 304 as can be seen is provided on the left side of the vehicle 200 and the foot rest sub-assemblies 306 and swing arm assemblies (not shown) are provided on both sides of the vehicle 200.. The foot rest sub-assemblies 306 comprise the rider foot pegs 403. The cross members 401, 402 have mounting provisions to engage with the mounting provisions, such as, holes of the foot rest sub-assemblies 306, swing arm sub assemblies (not shown), the prop stand sub-assembly 304, and the centre stand sub-assembly 305, by means of fasteners or welding. The prop stand sub-assembly 304 is attached to one end 402a of the second cross member 311. The center stand sub-assembly 305 of the vehicle 200 is connected to the second cross member 402 on the rear of the bottom power unit mounting bracket 311. The prop stand sub-assembly 304 comprises a prop stand tube 405, at least one prop stand mounting bracket 404, and at least one prop stand integrating unit 406. Exemplarily illustrated here are one prop stand integrating unit 406 and one prop stand mounting bracket 404. The prop stand integrating unit 406 is connected to the end 402a of the second cross member 402. The construction of the prop stand sub-assembly 304 is further explained.
[00043] Figs. 5A-5B and Fig. 5C exemplarily illustrate perspective views of the prop stand sub-assembly 304 in different positions of the prop stand tube 405 and a sectional view of the prop stand sub-assembly 304, respectively. The prop stand sub-assembly 304 comprises the prop stand tube 405, the prop stand mounting bracket 404, and the prop stand integrating unit 406. The prop stand integrating unit 406 is welded on its rear surface to the end 402a of the second cross member 402. On its front surface, the prop stand integrating unit 406 comprises mounting provisions for connecting the prop stand integrating unit 406 to the prop stand mounting bracket 404.
[00044] The prop stand mounting bracket 404 comprises top mounting provisions 501 to engage with the mounting provisions of the prop stand integrating unit 406 using fasteners 502, such as, screws, nut and bolt, snap fit fasteners, etc. Through the top mounting provisions 501 in the prop stand integrating unit 406, the prop stand mounting bracket 404 is fastened to the frame structure 300. The prop stand mounting bracket 404 further comprises bottom mounting provisions (not shown) for mounting a U-bracket 408 using a fastener 503. The prop stand tube 405 is swingably pivoted by means of the U-bracket 408. The prop stand mounting bracket 404 has angular bend of about 45 degrees in its structure as can be seen in Fig. 5C. The bottom mounting provisions are provided in the prop stand mounting bracket 404 after the bend for fastening the U-bracket 408.
[00045] The prop stand tube 405 is a bent tube with a stand shoe 412 at a distal and a foot aid portion 411 provided proximal to the stand shoe 412. The stand shoe 412 is a flattened portion of the prop stand tube 405 and the vehicle 200 rests on the stand shoe 412, when the prop stand sub-assembly 304 is deployed. The foot aid portion 411 is provided for allowing the rotation of the prop stand tube 405 about a pivot axis of bolt 503 of the U bracket 408 between the standing position and the retracted position by the rider’s or user’s foot. The standing position or the retracted position of the prop stand tube 405 is retained by an extension spring 407 that is connected between an extension member 409 and a hook 410 on a rear surface of the prop stand tube 405 facing the down tubes 307, 309. The extension member 409 extends from the prop stand mounting bracket 404 substantially laterally horizontally and disposed proximal to the U-bracket 408. The hook 410 is positioned at a position substantially mid-length of the prop stand tube 405. For parking the vehicle 200, the prop stand tube 405 is rotated from the retracted position shown in dotted lines to the vertical position. The prop stand tube 405 is coupled with the frame structure 300 through the prop stand mounting bracket 404 at a predetermined angle with respect to a vertical axis for deployment of the prop stand tube 405 and parking of the vehicle 200 in a balanced manner.
[00046] Fig. 6A exemplarily illustrates a perspective view and an exploded view of the prop stand integrating unit 406 of the prop stand sub-assembly 304 of the vehicle 200. The prop stand integrating unit 406 comprises an extending body portion 602 and a central receiving portion 601 extending substantially orthogonally from the extending body portion 602. The central receiving portion 601 is an open tubular structure with a substantially semi-circular cross-section that engages with the end 402a of the second cross member 402. The extending body portion 602 has a flat external surface and comprises mounting provisions 603 for engaging with the top mounting provisions of the prop stand mounting bracket 404. The central receiving portion 601 is welded to the second cross member 402 in a portion proximal to the end 402a of the second cross member 402. The central receiving portion 601 acts as a stiffener and a support reinforcing member which helps in taking bending loads by the prop stand sub-assembly 304.
[00047] The extending body portion 602 has a box type structure. A top surface of the extending body portion 602 comprises a depression 605a, 605b for receiving the second cross member 402. The extending body portion 602 comprises a front bracket 602a and a rear bracket 602b with inline mounting provisions 603a, 603b, and mounting bushes 604 to be positioned in the mounting provisions 603a, 603b. The front bracket 602a supports mounting of the prop stand mounting bracket 404 with the prop stand tube 405 to the extending body portion 602. The rear bracket 602b forms a closed loop with the front bracket 602a. The central receiving portion 601 connects the extending body portion 602 and the laterally extending end 402a of the second cross member 402.
[00048] The central receiving portion 601 extends from the rear bracket 602b laterally inwards towards the frame structure 300. The depth of the depressions 605a, 605b is same as the depth of the central receiving portion 601. The depressions 605a, 605b and the central receiving portion 601 receive the second cross member 402 and the central receiving portion 601 is welded to the second cross member 402. In an embodiment, the stiffener 601 is welded to the depressions 605a, 605b in the front bracket 602a and the rear bracket 602b respectively, and extends orthogonally to form the central receiving portion.
[00049] The front bracket 602a and the rear bracket 602b are welded together as a sub-assembly on the peripheries forming the rigid box structure of the extending body portion 602. The dimensions of the rectangular front bracket 602a are greater than the dimensions of the rectangular the rear bracket 602b such that the front bracket 602a encompasses the rear bracket 602b. The mounting provisions, that is, holes 603a, 603b in the front bracket and the rear bracket are inline and accommodate the threaded mounting bushes 604 in them. The mounting holes 603a, 603b with the mounting bushes 604 engage the fasteners 502 shown in Fig. 5C to fasten the prop stand mounting bracket 404 to the prop stand integrating unit 406.
[00050] Fig. 6B exemplarily illustrates a plan view of the prop stand sub-assembly 304 engaging with the frame structure 300. As exemplarily illustrated, the central receiving portion 601 is welded to the second cross member 402 in a portion proximal to the end 402a of the second cross member 402. The central receiving portion 601 has a contour conforming to the tubular second cross member 402 and receives a substantial length of the second cross member 402. Also can be seen are the central receiving portion 601 extending from the extending body portion 602 of the prop stand integrating unit 406. The extending body portion 602 of the prop stand integrating unit 406 is fastened to the prop stand mounting bracket 404 and the prop stand tube 405 extends from the U-bracket 408 on the prop stand mounting bracket 404.
[00051] Figs. 7A-7C exemplarily illustrate different perspective views of the prop stand mounting bracket 404 of the prop stand sub-assembly 304. As exemplarily illustrated, on a front surface 704, the prop stand mounting bracket 404 comprises multiple top mounting provisions 501, that is, holes for mounting the prop stand mounting bracket 404 to the prop stand integrating unit 406. Each of these top mounting provisions 501 is positioned in line with the mounting provisions 603 in the extending body portion 602 of the prop stand integrating unit 406. Shown in the Figs. 7A-7C are only two top mounting provisions 501 proximal to the edges of the prop stand mounting bracket 404 in the top portion 702 of the prop stand mounting bracket 404. However, the number of mounting provisions is not limited to only two; there may be multiple evenly distributed mounting provisions on the top portion 702 of the prop stand mounting bracket 404. The prop stand mounting bracket 702 has a non-regular shape, similar to the shape of an amoeba. The prop stand mounting bracket 404 has the top portion 702 with the top mounting provisions 501 and a bottom portion 703 with a bottom mounting provision 701 that are separated by the angular bend about the axis X-X’. The bottom portion 703 is inclined at an angle of about 45° with respect to the top portion 702 about the axis X-X’.
[00052] The bottom mounting provision 701, that is, a hole houses the main prop stand tube 405 with the help of the U-bracket 408. Further, in the bottom portion 703, mounting provisions 706, 708, for mounting a switch unit (not shown) and a return spring via hooks 707 is provided on the front surface 704 and the rear surface 705 respectively. The top portion 702 of the prop stand mounting bracket 404 is wide and narrows towards the bottom portion 703. The bottom mounting provision 701 is centrally located between the top mounting provisions 501 in the bottom portion 703 of the prop stand mounting bracket 404. The bottom mounting provision 701 is used for coupling the prop stand tube 405 with the prop stand integrating unit 406 using the U-bracket 408.
[00053] Fig. 8 exemplarily illustrates a front perspective view of the prop stand mounting bracket 404 attached to the prop stand integrating unit 406. As shown, the prop stand mounting bracket 404 is fastened to the prop stand integrating unit 406 using fasteners 502 in the top mounting provisions 501. The surface 704 of the top portion 702 of the prop stand mounting bracket 404 covers only the mounting provisions 603 of the extending body portion 602 and follows the external contour of the depressions 605a, 605b in the extending body portion 602 of the prop stand integrating unit 406. The location of the bottom mounting provision 701 is collinear to the central receiving portion 601 of the prop stand integrating unit 406. That is, the shape of the prop stand mounting bracket 404 is such that the frame mounting of the prop stand sub-assembly 304 and mounting of the prop stand tube 405 are arranged in a collinear manner. Also, the top mounting provisions 501 are on either sides of the central receiving portion 601. Thus, a top triangle, shown in dotted lines, between the top mounting provisions 501 and the central receiving portion 601 is formed and a bottom triangle, shown in dotted lines, between the top mounting provisions 501 and the bottom mounting provision 701 is formed. When the prop stand tube 405 is deployed to park the vehicle 200, the prop stand tube 405 hits the edge 709 of the prop stand mounting bracket 404 and the load borne by the prop stand tube 405 is transferred from the U- bracket 408 in the bottom mounting provision 701 to the central receiving portion 601 connected to the second cross member 402. The mounting pitch between the top mounting provisions 501 allows for equal distribution of the load to the top mounting provisions 501 and the extending body portion 602 of the prop stand integrating unit 406. The equally distributed load is transferred to the central receiving portion 601 and thus to the second cross member 402 in the frame structure 300 of the vehicle 200. The mounting pitch between the top mounting provisions 501 aids in this effective transfer of load between the prop strand mounting bracket 404 to the prop stand integrating unit 406, and thus to the frame structure 300 due to the triangulation of the top mounting provisions 501, the bottom mounting provision 701, and the central receiving portion 601. Thus, the positioning of the prop stand integrating unit 406 on the frame structure 300 and the prop stand tube 405 forms a rigid supporting triangulation effect and balances the prop stand tube load during its application.
[00054] Once, the accessibility of the prop stand sub-assembly 304 is fixed by means of its construction, it is important to position the prop stand sub-assembly 304 on the frame structure 300 at a location by determining the factors such as weight of the vehicle 200, centre of gravity of the vehicle 200, vehicle plane on the prop stand tube 405, contact point of the prop stand tube 405 on the ground, tyre dimensions, vertical load applied on the prop stand sub-assembly 405, etc., as described in the description of Figs. 9A-9B.
[00055] Figs. 9A-9B exemplarily illustrate schematic diagrams depicting the location of the prop stand sub-assembly 304 with respect to the frame structure 300 of the vehicle 200, when it is in a deployed state. As exemplarily illustrated in Fig. 9A, the position of the prop stand tube 405 is shown, when deployed, with respect to the wheel base of the vehicle 200. ‘a’ denotes the wheel base, that is the distance between the front wheel axle 204 and the rear wheel axle 205. ‘b’ denotes distance of the mounting of the prop stand sub-assembly 304 from the front wheel axle 204. ‘c’ denotes the distance of the prop stand shoe 412 from the front wheel axle 204. The location of mounting the prop stand sub-assembly 304 on the frame structure 300 is selected to be at a location where the ratio of a:b is about 2:1. That is, the first cross member 401 and the second cross member 402 lie in a common vertical plane YY’, when seen in a vehicle side elevation view and the common vertical plane YY’ passing through the second cross member 402 is disposed substantially at a longitudinal centre of the vehicle 200.
[00056] The position of prop stand tube 405, when deployed, is arranged to balance the vehicle centre of gravity in the vertical, lateral, and longitudinal directions of force. The position of the prop stand sub-assembly 304 is effective in transfer of weight during application of the prop stand tube 405 and the lean angle of the prop stand tube 405 with respect to a vertical axis helps to counter the weight.
[00057] As exemplarily illustrated in Fig. 9B, working ratios are determined to position the prop stand sub-assembly 304 on the frame structure 300 with respect to the height of the vehicle 200. The working ratios are important for determining the position of the prop stand tube 405 and improving stability of the prop stand tube 405. A ratio of the tyre size of the vehicle 200 to the height of the prop stand tube 405 in the vertical direction helps in overcoming toppling of the vehicle 200, when the prop stand tube 405 is deployed. Further, a lateral offset of the prop stand tube 405 mounting to the point the prop stand tube 405 contacts the ground helps in computing ground reach of the prop stand tube 405 and overcomes the sliding effect, when the prop stand tube 405 is deployed.
[00058] As illustrated in Fig. 9B, line OB denotes a vertical plane passing through longitudinal centre O of the vehicle 200; the point C denotes the centre of the rear wheel axle 205, the point G denotes the prop stand sub-assembly 304 mounting point on the frame structure 300 (identified by axis of the central receiving portion 601), the point D denotes the extension of prop stand mounting point to the central plane of vehicle 200, the point F denotes the prop stand tube ground resting point (in vehicle vertical position); the point E denotes the extension of prop stand tube ground resting point F on to the vehicle central plane; the point H denotes the vertical drop down from the prop stand tube mounting point G to the prop stand tube ground resting plane EF; the point B denotes a point indicating the ground plane; and the point A denotes an extrapolation of prop stand ground resting point F (in vehicle up-right condition). For the stability of the vehicle 200 and the prop stand tube 405 in the inclined position, the position of the prop stand sub-assembly 405 is determined to be configured such that the length OB: length OC is about 2:1, the length FE: length GD is about 2:1, and the angle (GCD) ~ angle (CAB) is about 45°.
[00059] Thus, the positioning of the prop stand sub-assembly 304 on the frame structure 300 at a location matching with the centre of gravity of the vehicle 200 in both the vertical and longitudinal directions, the ratio of tyre size to the mounting height of prop stand sub-assembly 304, and the distance of prop stand tube 405 from vehicle centre plane at its mounting to the point of contacting ground helps in reducing overhang distance and improves prop stand sub-assembly 304 stability.
[00060] Fig. 10 exemplarily illustrates a perspective view of an alternate embodiment of a prop stand sub-assembly 405 mounted on the frame structure 300 of the vehicle 200. In this embodiment, the prop stand mounting bracket 405 is mounted directly onto the bottom engine mounting bracket 311 of the frame structure 300. The prop stand mounting bracket 405 is welded to the bottom engine mounting bracket 311 with a reinforcement member 1001 that reinforces the joint of the prop stand mounting bracket 405 and the connecting members of the bottom engine mounting bracket 311. In this embodiment, the prop stand integrating unit 406 is eliminated, while the reinforcement member 1001 is added.
[00061] The design of the prop stand sub-assembly in a vehicle as described in the present invention provides technical advancement in the field of manufacturing, assembly, and use of the prop stand sub-assembly as follows: The prop stand sub-assembly is a modular structure that is simple to manufacture, assemble, service, maintain, and replace, with reduced associated costs. The location of mounting the prop stand sub-assembly on the frame structure of the vehicle described does not disturb the centre of gravity of the vehicle, thereby facilitating stable parking, vehicle maneuverability, and stable driving of the vehicle. The prop stand mounting bracket does not experience any overhang under loading due to the spacing of the mounting provisions on its surface and also the angular bend on its surface. The structure of the prop stand sub-assembly pivoted to the second cross member and the prop stand bracket housing the prop stand tube form a triangulation effect. This helps in minimizing the direct load to the frame and reduces the deflections of the prop stand mounting bracket, overcoming issues in the prior arts. The position of the prop stand with respect to the rider ergonomics is an important parameter defined by the length of the prop stand and its offset with respect to vehicle centre plane. The forward angle and the retraction angle help in articulation of the prop stand and offer convenience.
[00062] The prop stand sub-assembly position ensures the primary purpose of stand operation, stand reach from rider footrest and stand articulation during opening and closing. The prop stand sub-assembly can easily be mounted to the frame structure in workstations, also facilitates packing for meeting specific requirements of different markets and customers. The prop stand stiffener welded to the prop stand integrating unit at the rear portion acts as a support reinforcing member which helps in taking bending loads.
[00063] The prop stand sub-assembly utilizes frame cross member and prop stand integrating unit as a central pivot, thereby reducing direct load to the frame and vibrations during prop stand application. The mounting provisions positioned on the prop stand integrating unit on either side of the frame cross member form a triangulation effect offering higher structural rigidity. The prop stand integrating unit eliminates the requirement of using separate stiffener or rib to further reinforce the prop stand mounting bracket. Effective weight distribution takes place with such a construction of the prop stand sub-assembly, while improving the durability of the prop stand during its operation and use. Weld distortions arising from welding the prop stand bracket to frame are eliminated, thereby improving the weld quality of the frame and reducing direct load to frame members.
[00064] Many modifications and variations of the present subject matter are possible in the light of above disclosure. Therefore, within the scope of claims of the present subject matter, the present disclosure may be practiced other than as specifically described.

LIST OF REFERENCE NUMERALS

101- Rider foot rest in prior art
102-engine mounting bracket in prior art
103- Prop stand mounting bracket in prior art
104- Prop stand in prior art
105- Down tube in prior art
200- Vehicle
201- Cover frame assembly
202- Second rear fender
203- Tail cover assembly
204- Front wheel
205- Rear wheel
206- Front fork assembly
207- Swing arm
209- Handle bar
210- Seat
211a- Rider seat
211b- Pillion seat
212- Headlamp unit
213- Tail lamp
214- Rear fender
215- Rear suspension system
216- Front fender
217- Fuel tank
218- Reflex reflector
300- Frame structure
301-head tube
302-main frame
303- Rear tube
304- Prop stand sub-assembly
305- Center stand sub-assembly
306- Foot rest assembly
307, 309- down tubes
308- Rear bending portion of the main frame 302
310- Top power unit mounting bracket
311- Bottom power unit mounting bracket
401- First cross member
402- Second cross member
402a- end of the second cross member
403- Rider foot rests
404- Prop stand mounting bracket
405- Prop stand tube
406- Prop stand integrating unit
407- Extension spring
408- U-bracket
409- Extension member
410- Hook
411- Foot aid portion
412- Stand shoe
501- Top mounting provisions in the prop stand integrating unit 406
502, 503-fasteners
601- Central receiving portion
602- Extending body portion
602a, 602b- front bracket and rear bracket of the extending body portion
603- Mounting provisions in extending body portion
603a, 603b- mounting provisions in front bracket and rear bracket
604- Mounting bushes
605a, 605b-depressions in front bracket and rear bracket
701-bottom mounting provision
702- Top portion of the prop stand mounting bracket 404
703- Bottom portion of the prop stand mounting bracket 404
704- Front surface of the prop stand mounting bracket 404
705- Rear surface of the prop stand mounting bracket 404
706-mounting provision for switch unit on the prop stand mounting bracket 404
707-return spring and hooks
708- Mounting provision for return spring and hooks on the prop stand mounting bracket 404
1001- Reinforcement member