Claims:We Claim:
1. A powertrain (102) for a vehicle (100) comprising:
a chassis frame structure (101),
a prime mover (102A),
a transmission assembly (102B), said transmission assembly (102B) being enclosed within a housing (203),
wherein said prime mover (102A) being attached to said housing (203), and
wherein said housing (203) being attached to said chassis frame structure using a mounting assembly (201A, 201B) to provide optimum ground clearance.
2. The powertrain (102) for a vehicle (100) as claimed in claim 1, wherein said mounting assembly (201A, 201B) includes
a front mounting assembly (201A), and
a rear mounting assembly (201B).
3. A powertrain (102) for a vehicle (100) comprising:
a chassis frame structure (101),
a prime mover (102A), and
a transmission assembly (102B),
wherein said prime mover (102A) being configured substantially below said transmission assembly (102B), and
wherein a prime mover casing (601) being elastically secured to said chassis frame structure (101) by a front mounting assembly (201A),
wherein said front mounting assembly (201A) being configured on one of the left or a right side of the said prime mover casing (601), and a portion of said prime mover casing (601) is attached to said chassis frame structure (101) by a rear mounting structure (201B) to provide optimum ground clearance.
4. The powertrain (102) for a vehicle (100) as claimed in claim 2 or claim 3, wherein said rear mounting assembly (201B) with said chassis frame structure (101) being disposed on either side of said front mounting assembly (201A).
5. The powertrain (102) for a vehicle (100) as claimed in claim 2 or claim 3, wherein said front mounting assembly (201A) includes
a first mounting structure (301),
a second mounting structure (302),
one or more primary sleeve member (308), and
one or more front mounting damper (302B),
wherein one end of said second mounting structure (302) being connected to said powertrain (102) through said front mounting damper (302B).
6. The powertrain (102) for a vehicle (100) as claimed in claim 2 or claim 3, wherein said rear mounting assembly (201B) includes
a third mounting structure (306),
one or more secondary sleeve member (401),
one or more tertiary sleeve member (403), and
one or more rear mounting damper (306A),
wherein one end of said third mounting structure (306) being connected to said powertrain (102).
7. The powertrain (102) for a vehicle (100) as claimed in claim 5, wherein said first mounting structure (301) being configured to have a predetermined shape attached to the chassis frame structure (101).
8. The powertrain (102) for a vehicle (100) as claimed in claim 5, wherein front end of said second mounting structure (302) being attached to an attachment portion (301A) of said first mounting structure (301) and said rear end of the second mounting structure (302) being attached to said powertrain (102).
9. The powertrain (102) for a vehicle (100) as claimed in claim 5, wherein said rear end of said second mounting structure (302) being configured to have a hollow cylindrical portion extending in a lateral direction (L-L’) of the powertrain (102).
10. The powertrain (102) for a vehicle (100) as claimed in claim 5, wherein said front mounting damper (302B) being disposed in the inner peripheral surface of said hollow cylindrical portion.
11. The powertrain (102) for a vehicle (100) as claimed in claim 6, wherein one end of said third mounting structure (306) being attached to one or more rear cross member (307) of said chassis frame structure (101).
12. The powertrain (102) for a vehicle (100) as claimed in claim 6, wherein said third mounting structure (306) being configured to have an upper left and right side portions (306C), and a central portion (306B).
13. The powertrain (102) for a vehicle (100) as claimed in claim 12, wherein said upper left and right side portions (306C) being configured to have hollow cylindrical portion.
14. The powertrain (102) for a vehicle (100) as claimed in claim 13, wherein said central portion (306B) has a top face and a bottom face, wherein one or more openings (306BA) is formed in said top face (306TF) being configured to have substantially larger inner diameter (D1) than the one or more openings (306BB) formed in said bottom face (306BF).
15. The powertrain (102) for a vehicle (100) as claimed in claim 14, wherein said openings (306BA) formed in top face (306TF) being configured to receive said tertiary sleeve member (403).
16. The powertrain (102) for a vehicle (100) as claimed in claim 15, wherein a portion of said tertiary sleeve member (403) being positioned between the top face (306TF) and the bottom face (306BF), wherein said tertiary sleeve member (403 has a hole (401A) adapted to receive a threaded bolt (402) to attach said third mounting structure (306) to said powertrain (102).
17. An electric vehicle (100) comprises:
a chassis frame structure (101);
a prime mover (102A); and
a transmission assembly (102B), said transmission assembly (102B) is enclosed with a housing (203);
wherein said housing (203) being attached to said chassis frame structure (101) by a mounting assembly (201A, 201B) as claimed in any of the preceding claims,
wherein said prime mover (102A) being operatively connected to transmission assembly (102B) through a mechanical means (202),
wherein said mechanical means (202) includes a belt (202B) couples a drive pulley (202A) and driven pulley (202C),
wherein said drive pulley (202A) being secured to a rotor of the prime mover (102A) and said driven pulley (202C) being secured to an input shaft of said transmission assembly (102B),
wherein said drive pulley (202A) being positioned substantially vertically upwards to said driven pulley (202C). , Description:TECHNICAL FIELD
[0001] The present subject matter relates to a vehicle. More particularly, to a powertrain for a vehicle.

BACKGROUND
[0002] Over the last few years, with the induction of new powertrain technologies concomitantly, substantial attention has been paid to the reduction of pollutants emitted by vehicles. To this end, much attention has also been paid to the development of hybrid electric vehicles (HEV’s)/ electric vehicles (EV’s) for their optimal performance and durability. Importantly, the performance and durability are essential vehicle attribute that attracts customers to purchase the vehicle.
[0003] The above information disclosed in this background section is only for enhancement of understanding of the background of the disclosure and therefore it may contain information that does not form the prior art that is already known in this country to a person of ordinary skill in the art.

BRIEF DESCRIPTION OF THE DRAWINGS
[0004] The present invention is described with reference to an exemplary embodiment of powertrain in a three wheeled electric vehicle. The powertrain described here includes electric motor. Such a powertrain can be installed in a two or three or multi wheeled vehicle. The same numbers are used throughout the drawings to reference like features and components. Further, the inventive features of the invention are set forth in the appended claims.
[0005] Non-limiting and non-exhaustive embodiments of the invention are described with reference to the following figures, wherein like reference numerals refer to like parts throughout the various views unless otherwise specified. It should be appreciated that the following figures may not be drawn to scale.
[0006] Descriptions of certain details and implementations follow, including a description of the figures, which may depict some or all of the embodiments described below, as well as a discussion of other potential embodiments or implementations of the inventive concepts presented herein. An overview of embodiments of the invention is provided below, followed by a more detailed description with reference to the drawings.
[0007] Figure 1 illustrates a top view of a vehicle (100) where few parts are omitted from the figure, as per embodiment, in accordance with one example of the present subject matter.
[0008] Figure 2aillustrates a bottom side perspective view of the vehicle (100) where few parts are omitted from the figure, as per embodiment, in accordance with one example of the present subject matter.
[0009] Figure 2b illustrates a rear side perspective view of the vehicle (100) where few parts are omitted from the figure, as per embodiment, in accordance with one example of the present subject matter.
[00010] Figure 3 illustrates a rear side exploded view of the vehicle (100) where few parts are omitted from the figure, as per embodiment, in accordance with one example of the present subject matter
[00011] Figure 4a illustrates an exploded rear side perspective view of the powertrain (102) with the rear mounting assembly (201B) where few parts are omitted from the figure as per embodiment, in accordance with one example of the present subject matter.
[00012] Figure 4b illustrates an exploded perspective view of the rear mounting assembly (201B) where few parts are omitted from the figure as per embodiment, in accordance with one example of the present subject matter.
[00013] Figure 5 illustrates a side cut section view of the rear mounting assembly (201B) as shown in figure 4a across an A-A’ axis and localized enlarged view of the rear mounting assembly (201B) where few parts are omitted from the figure as per embodiment, in accordance with one example of the present subject matter.
[00014] Figure 6 illustrates a front side view of the vehicle (100) where few parts are omitted from the figure, as per alternative embodiment, in accordance with one example of the present subject matter.
DETAILED DESCRIPTION
[00015] In the following description specific details are set forth to provide a thorough understanding of the embodiments. One skilled in the relevant art will recognize, however, that the techniques described herein can be practiced without one or more of the specific details, or with other methods, components, materials, etc. In other instances, well-known structures, materials, or operations are not shown or described in detail to avoid obscuring certain aspects.
[00016] Electric vehicles have the potential to substantially cut greenhouse gas emissions from the transport sector. Typically, a drive system of the electric vehicle includes a battery for powering an electric motor assembly and a transmission assembly. The electric motor assembly includes a controller for controlling the speed of the electric motor.
[00017] However, there are certain limitations associated with electric vehicles. Most significantly, the range of electric vehicles is limited by their batteries. To increase the range of electric vehicles, pluralities of battery packs are used.
[00018] In addition to that, current batteries are prone to failure due to reasons such as the continuous transmission of mechanical vibrations, exposure to high impact forces and, thermal runaway. This phenomenon can lead to an uncontrolled chain of exothermic reactions resulting in the release of toxic gas. This can further lead to the development of high pressure in the battery packs leading to premature failure, fire, and explosions. To address the said issue, batteries are provided with a mechanical interface. The mechanical interface protects and isolates the battery pack and at the same time maintains optimum battery cell temperature. However, this significantly increases the size, weight, and cost of the electric vehicle. Moreover, due to the plurality of battery packs less storage space is available in the vehicle.
[00019] At times, it is observed that the electric motor being prime mover tends to fail or switch off erroneously. The failure of the electric motor suddenly stops a running electric vehicle and / or suddenly starts the electric vehicle which was out of action. It is observed these failures are caused due to mud and water ingression in the electric motor and associated control devices. The ingression of mud and water in the electric motor or the associated control devices causes insulation failure leading to erroneous behavior.
[00020] To address the said issue, the electric motor can be covered with a dedicated cover member. However, the use of the cover member utilizes valuable space in the compact vehicle and sometimes reduces the ground clearance of the vehicle especially when the electric motor is disposed towards the ground. In such a layout, while crossing a bump, the dedicated cover hits the road as the suspension travels down further reducing the clearance with the ground. The reduced ground clearance can be addressed by increasing the stiffness of the suspension spring. However, the increased stiffness of the suspension spring adversely affects the riding/ driving comfort.
[00021] To address the said issue, designers tend to detachably attach the electric motor along with the casing enclosing transmission assembly as a single drive unit which is attached to the chassis frame structure through a mounting assembly. However, due to increase in the number of devices, the load on the mounting assembly also increases. The increased load damages the mounting assembly which reduces the binding force on the single drive unit. This results in the free movement of the single drive unit including rolling of the electric motor.
[00022] Therefore, in order to arrest the free movement, the strength of the mounting assembly, which includes a plurality of mounting brackets and the bolts and nuts, needs to be increased. However, when the thicknesses of the mounting brackets are increased to ensure strength thereof, the weights and cost of the mounting brackets increases. Furthermore, in order to ensure the strength of the bolts, it may be possible to increase nominal diameters of the fasteners, which however undesirably increases weights and cost.
[00023] Therefore, it is a challenge for design engineers to meet conflicting requirements, to design a mounting assembly to reliably mount the compact drive unit to the chassis frame structure in a cost-effective manner as well as with improved ground clearance. Further, it is desirable to provide a mounting assembly for the drive system which allows the drive unit to be quickly and easily removed from the chassis frame structure during servicing.
[00024] To this end, there is a need to provide a mounting assembly that will meet the common requirements of the vehicle including low weight, low cost, high reliability, while overcoming all the above problems & other problems of the known art. The aforementioned disadvantages of the prior arts are solved by the present invention which provides an improved mounting assembly. The mounting assembly is advantageously used striving to meet customer expectations by providing a low cost and safe electric vehicle.
[00025] According to one embodiment, it is an object of the present invention to provide a cost-effective and reliable mounting assembly, which is light in weight and maintains optimum ground clearance.
[00026] According to one embodiment, it is another object of the present invention to provide a mounting assembly being configured to ensure quick installation and removal of the single drive unit during servicing.
[00027] According to the present subject matter to attain the above-mentioned objectives, a first characteristic of the present invention is a powertrain for a vehicle comprising: a chassis frame structure, a prime mover, a transmission assembly, said transmission assembly being enclosed within a housing, wherein said prime mover being attached to said housing, and wherein said housing being attached to said chassis frame structure using a mount assembly to provide optimum ground clearance.
[00028] In addition to the first characteristic, a second characteristic of the present invention is a powertrain, wherein said mounting assembly includes a front mounting assembly, and a rear mounting assembly.
[00029] A third characteristic of the present invention is a powertrain for a vehicle (100) comprising: a chassis frame structure, a prime mover, and a transmission assembly, wherein said prime mover being configured substantially below said transmission assembly, and wherein a prime mover casing being elastically secured to said chassis frame structure by a front mounting assembly, wherein said front mounting assembly being configured on one of the left or a right side of the said prime mover casing, and a portion of said prime mover casing is attached to said chassis frame structure by a rear mounting structure to provide optimum ground clearance.
[00030] In addition to the second and third characteristic, a fourth characteristic of the present invention is a powertrain, wherein said rear mounting assembly with said chassis frame structure being disposed on either side of said front mounting assembly.
[00031] In addition to the second and third characteristic, a fifth characteristic of the present invention is a powertrain, wherein said front mounting assembly includes a first mounting structure, a second mounting structure, one or more primary sleeve member, and one or more front mounting damper, wherein one end of said second mount member being connected to said powertrain through said front mount damper.
[00032] In addition to the second and third characteristic, a sixth characteristic of the present invention is a powertrain, wherein said rear mounting assembly includes a third mounting structure, one or more secondary sleeve member, one or more tertiary sleeve member, and a rear mounting damper, wherein one end of said third mounting structure being connected to said powertrain.
[00033] In addition to the fifth characteristic, a seventh characteristic of the present invention is a powertrain, wherein first mounting structure being configured to have a predetermined shape attached to the chassis frame structure.
[00034] In addition to the fifth characteristic, an eight characteristic of the present invention is a powertrain, wherein front end of the second mounting structure is attached to an attachment portion of said first mounting structure, and the rear end of the second mounting structure is attached to said powertrain.
[00035] In addition to the fifth characteristic, a ninth characteristic of the present invention is a powertrain, wherein said rear end of said second mounting structure is configured to have hollow cylindrical portion extending in a lateral direction of the powertrain.
[00036] In addition to the fifth characteristic, a tenth characteristic of the present invention is a powertrain, wherein said front mounting damper is disposed in the inner peripheral surface of the hollow cylindrical portion.
[00037] In addition to the sixth characteristic, an eleventh characteristic of the present invention is a powertrain, wherein one or more end of said third mounting structure is attached to one or more rear cross member of the chassis frame structure.
[00038] In addition to the sixth characteristic, a twelfth characteristic of the present invention is a powertrain, wherein said third mounting structure being configured to have an upper left and right side portions, and a central portion.
[00039] In addition to the twelfth characteristic, a thirteenth characteristic of the present invention is a powertrain, wherein said upper left and right side portions being configured to have hollow cylindrical portion.
[00040] In addition to the thirteenth characteristic, a fourteenth characteristic of the present invention is a powertrain, wherein said central portion has a top face and a bottom face, wherein one or more openings is formed in said top face being configured to have substantially larger inner diameter than the one or more openings formed in said bottom face.
[00041] In addition to the fourteenth characteristic, a fifteenth characteristic of the present invention is a powertrain, wherein said openings formed in top face being configured to receive said tertiary sleeve member.
[00042] In addition to the fifteenth characteristic, a sixteenth characteristic of the present invention is a powertrain, wherein a portion of said tertiary sleeve member being positioned between the top face and the bottom face, wherein said tertiary sleeve member has a hole adapted to receive a threaded bolt to attach said third mounting structure to said powertrain.
[00043] A seventeenth characteristic of the present invention is an electric vehicle comprises: a chassis frame structure; a prime mover; and a transmission assembly, said transmission assembly is enclosed with a housing; wherein said housing is attached to said chassis frame structure by a mounting assembly as claimed in any of the preceding characteristic, wherein said prime mover being operatively connected to transmission assembly through a mechanical means, wherein said mechanical means includes a belt coupled to a drive pulley and driven pulley, wherein said drive pulley being secured to a rotor of the prime mover and said driven pulley is secured to an input shaft of the transmission assembly, wherein said drive pulley is positioned substantially vertically upwards of said driven pulley.
[00044] The present subject matter is further described with reference to accompanying figures. 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.
[00045] The foregoing disclosure is not intended to limit the present disclosure to the precise forms or particular fields of use disclosed. As such, it is contemplated that various alternate embodiments and/or modifications to the present disclosure, whether explicitly described or implied herein, are possible in light of the disclosure. Having thus described embodiments of the present disclosure, a person of ordinary skill in the art will recognize that changes may be made in form and detail without departing from the scope of the present disclosure. Thus, the present disclosure is limited only by the claims.
[00046] In the foregoing specification, the disclosure has been described with reference to specific embodiments. However, as one skilled in the art will appreciate, various embodiments disclosed herein can be modified or otherwise implemented in various other ways without departing from the spirit and scope of the disclosure. Accordingly, this description is to be considered as illustrative and is for the purpose of teaching those skilled in the art the manner of making and using various embodiments of the disclosure. It is to be understood that the forms of disclosure herein shown and described are to be taken as representative embodiments. Equivalent elements, materials, processes or steps may be substituted for those representatively illustrated and described herein. Moreover, certain features of the disclosure may be utilized independently of the use of other features, all as would be apparent to one skilled in the art after having the benefit of this description of the disclosure. Expressions such as “including”, “comprising”, “incorporating”, “consisting of”, “have”, “is” used to describe and claim the present disclosure are intended to be construed in a non-exclusive manner, namely allowing for items, components or elements not explicitly described also to be present. Reference to the singular is also to be construed to relate to the plural.
[00047] Further, various embodiments disclosed herein are to be taken in the illustrative and explanatory sense, and should in no way be construed as limiting of the present disclosure. All joinder references (e.g., attached, affixed, coupled, connected, etc.) are only used to aid the reader's understanding of the present disclosure, and may not create limitations, particularly as to the position, orientation, or use of the systems and/or methods disclosed herein. Therefore, joinder references, if any, are to be construed broadly. Moreover, such joinder references do not necessarily infer that two elements are directly connected to each other.
[00048] Additionally, all numerical terms, such as, but not limited to, “first”, “second”, “third”, “primary”, “secondary”, “main” or any other ordinary and/or numerical terms, should also be taken only as identifiers, to assist the reader's understanding of the various elements, embodiments, variations and/or modifications of the present disclosure, and may not create any limitations, particularly as to the order, or preference, of any element, embodiment, variation and/or modification relative to, or over, another element, embodiment, variation and/or modification.
[00049] It will also be appreciated that one or more of the elements depicted in the drawings/figures can also be implemented in a more separated or integrated manner, or even removed or rendered as inoperable in certain cases, as is useful in accordance with a particular application. Additionally, any signal hatches in the drawings/figures should be considered only as exemplary, and not limiting, unless otherwise specifically specified.
[00050] The embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
[00051] Figure 1 illustrates a top view of a vehicle (100) where few parts are omitted from the figure, as per embodiment, in accordance with one example of the present subject matter. The invention will be described taking an electric/hybrid electric multi-wheeled vehicle (including a three-wheeled vehicle) as an example through the specification. As indicated in Figure 1, this electric/hybrid electric vehicle (100) (hereinafter “vehicle”) has, for example, a chassis frame structure (101). The chassis frame structure (101) includes one or more cross member (101B), a central longitudinal member (101C), and a pair of left and right side longitudinal members (101A). As per the illustrated embodiment, one or more cross member (101B) connect the pair of left and right side members (101A). A powertrain (102) is secured to the chassis frame structure (101). Especially, the powertrain (102) is mounted at substantially the middle of the chassis frame structure (101) between a pair of left and right side members (101A). The powertrain (102) provides the driving power to the rear wheels (104) through the right and left rear axles (103). The right and left axles (103) extended in opposite transverse directions.
[00052] Figure 2a illustrates a bottom side perspective view of the vehicle (100) where few parts are omitted from the figure, as per embodiment, in accordance with one example of the present subject matter. Figure 2b illustrates a rear side perspective view of the vehicle (100) where few parts are omitted from the figure, as per embodiment, in accordance with one example of the present subject matter. For sake of brevity, Figure 2a and Figure 2b will be discussed together. As indicated in figure 2a, the powertrain (102) is detachably attached to the chassis frame structure (101) using a mounting assembly (201A, 201B). The mounting assembly (201A, 201B) includes a front mounting assembly (201A) and a rear mounting assembly (201B). Further, as indicated in figure 2b, the powertrain (102) comprises a prime mover (102A) and a transmission assembly (102B). The prime mover (102A) includes an electric machine. The rotation of the electric machine is controlled by an electric machine controller (102C) (“hereinafter EMC”). The EMC (102C) is configured to receive inputs from a throttle position sensor (not shown). As per an embodiment, the throttle position sensor (not shown) is operatively connected to a leg operated pedal or a hand operated throttle unit (not shown). The prime mover (102A) is operatively connected to the transmission assembly (102B) through the mechanical means (202). The transmission assembly (102B) is enclosed within a housing (203). As shown in the illustrated figure 2b, the mechanical means (202) includes a drive pulley (202A) secured to a rotor of the prime mover (102A) and the driven pulley (202C) is secured to an input shaft (not shown) of the transmission assembly (102B) coupled by the belt (202B). As per the preferred embodiment, the drive pulley (202A) is positioned substantially vertically upwards to the driven pulley (202C) to enable a compact layout. As per alternative embodiment, the mechanical means can include a sprocket and chain drive.
[00053] Figure 3 illustrates a rear side exploded view of the vehicle (100) where few parts are omitted from the figure, as per embodiment, in accordance with one example of the present subject matter. As indicated in the figure, the powertrain (102) is attached to the chassis frame structure (101) at two or more locations by mounting assembly (201A, 201B) as shown by dotted lines. The two locations include a front lower side, and rear top side of the powertrain (102). Especially, the front lower side of the powertrain (102) is detachably attached to the chassis frame structure (101) through the front mounting assembly (201A), while the rear top side of the powertrain (102) is detachably attached to the chassis frame structure (101) through the rear mounting assembly (201B).
[00054] The front mounting assembly (201A) comprises a first mounting structure (301), and a second mounting structure (302). Specifically, the first mounting structure (301) is attached to the chassis frame structure (101). As per preferred embodiment, the first mounting structure (301) is welded to the chassis frame structure (101). The first mounting structure (301) extends rearwardly downward initially, and midway bends towards the front direction (F) of the vehicle (100) forming a substantially V shaped predetermined profile with its vertex extending opposite to the front direction (F) of the vehicle (100). A front end of the second mounting structure (302) is attached to an attachment portion (301A) of the first mounting structure (301) while the rear end of the second mounting structure (302) is attached to the powertrain (102) via a front mounting damper (302B). As per the preferred embodiment, the attachment portion (301A) of the first mounting structure (301) has at least one opening (301AA), likewise, the front end of the second mounting structure (302) has at least one opening (302A). Both the openings (301AA, 302A) are configured to receive a front mounting attachment means (303). As per the illustrated embodiment, the attachment portion (301A) has two openings (301AA), likewise, the front end of the second mounting structure (302) has two openings (302A) being configured to receive threaded bolts (303) to secure one end of the second mounting structure (302) to the first mounting structure (301). Further, the rear end of said second mounting structure (302) is configured to have a hollow cylindrical portion (302C) extending in a lateral direction (L-L’) of the powertrain (102). The front mounting damper (302B) is disposed in the inner peripheral surface (not shown) of the hollow cylindrical portion (302C) such that the front mounting damper (302B) is interposed between a primary sleeve member (308) and the inner peripheral surface (not shown) of the hollow cylindrical portion (302C). As per the illustrated embodiment, a threaded bolt (304) passes through an opening (305A) provided in a flange portion (305) of the housing (203) and an opening in the primary sleeve member (308) to prevent the rolling and swinging of the prime mover (102A) thereby enabling a secure assembly. Further, the front mounting damper (302B) isolates the transmission of vibration from the powertrain (102) to the chassis frame structure (101) thereby improves the riding/ driving comfort.
[00055] As depicted in the figure, the rear mounting assembly (201B) comprises a third mounting structure (306). The rear portion of the powertrain (102) is connected to the chassis frame structure (101) through the third mounting structure (306) via one or more rear mounting dampers (306A). Especially, the third mounting structure (306) is attached to a pair of brackets (307A, 307B) provided in a rear cross member (307) of the chassis frame structure (101) through a rear mounting attachment means (309).
[00056] Figure 4a illustrates an exploded rear side perspective view of the powertrain (102) with the rear mounting assembly (201B) where few parts are omitted from the figure as per embodiment, in accordance with one example of the present subject matter. Figure 4b illustrates an exploded perspective view of the rear mounting assembly (201B) where few parts are omitted from the figure as per embodiment, in accordance with one example of the present subject matter. As shown in figure 4(b), the rear mounting assembly (201B) includes one or more secondary sleeve member (401) and one or more tertiary sleeve member (403). The third mounting structure (306) is detachably attached to the powertrain (102) by means of threaded fasteners (402). The third mounting structure (306) is configured to have an upper left and right side portions (306C), and a central portion (306B). As per the illustrated embodiment, the central portion (306B) has a substantially rectangular cross section with four elongated faces. The four elongated faces also include a top face (306TF), and a parallel bottom face (306BF). The four elongated faces also include parallel side faces (306SF). The top face (306TF) and parallel bottom face (306BF) are provided with openings (306BA, 306BB). The housing (203) enclosing transmission assembly has one or more threaded apertures (203A) being configured to receive the threaded fastener (402) to attach the third mounting structure (306) to the powertrain (102).
[00057] Further, the upper left and right side portions (306C) of said third mounting structure (306) are configured to have a predetermined shape of the hollow cylindrical portion extending in the lateral direction (L-L’) of the powertrain (102). The rear mounting damper (306A) is disposed of in the inner peripheral surface (306CA) of the hollow cylindrical portion such that the rear mounting damper (306A) is interposed between the secondary sleeve member (401) and the inner peripheral surface (306CA) of the hollow cylindrical portion. The secondary sleeve member (401) has an opening configured to receive the attachment means (309) (as shown in figure 3).
[00058] Figure 5 illustrates a side cut section view of the rear mounting assembly (201B) as shown in figure 4(a) across an A-A’ axis and a localized enlarged view of the rear mounting assembly (201B) where few parts are omitted from the figure as per embodiment, in accordance with one example of the present subject matter. The central portion (306B) has openings formed due to two openings (306BA) which extend through the top face (306TF) and the bottom face (306BF) of the central portion (306B). The openings (306BA) formed in the top face (306TF) is configured to have a substantially larger inner diameter (D1) than the openings (306BB) formed in the bottom face (306BF) of the central portion (306B). The openings (306BA) formed in the top face (306TF) is configured to receive the tertiary sleeve member (403). A portion of the tertiary sleeve member (403) is positioned between the top face (306TF) and the bottom face (306BF), while a portion of the tertiary sleeve member (403) projects out of the top face (306TF) of the central portion (306B). The tertiary sleeve member (403) has an opening (403A) adapted to receive the threaded fastener (402) (as shown in figure 4a) to attach the third mounting structure (306) to the powertrain (102) (as shown in figure 4a).
[00059] Figure 6 illustrates a front side view of the vehicle (100) where few parts are omitted from the figure, as per alternative embodiment, in accordance with one example of the present subject matter. The construction of the front mounting assembly (201A) and rear mounting assembly (201B) is identical to those in Figures 3, 4, 5 and a detailed description thereof will not be reproduced herein for the sake of brevity. As per alternative embodiment, the prime mover (102A) is configured substantially below the transmission assembly (102B). As per the illustrated embodiment, the prime mover (102A) is elastically secured to the chassis frame structure (101) by the front mounting assembly (201A). The front mounting assembly (201A) is configured on one of the left or a right side of the prime mover casing (601) thereby forming a first coupling. As per the illustrated embodiment, the first coupling is configured on the left side of the prime mover casing (601) when viewed from the rear (R) side of the vehicle (100). Further, the prime mover casing (601) is coupled to the chassis frame structure (101) by a second coupling by means of the rear mounting assembly (201B). The rear mounting assembly with the chassis frame structure (101) is disposed on either side of the first coupling.
[00060] According to the above architecture, one of the primary efficacies of the present invention is the secure, reliable, optimally rigid, vibration resistant, and cost-effective mounting assembly to provide a compact layout as well as optimum ground clearance. The front mounting assembly is configured to effectively suppress the rolling and / or swinging of the prime mover while still configuring adequate degrees of freedom to isolate vibration and shock loads. Further, the rear mounting assembly includes one or more sleeve members in the central portion of the third mounting structure which resists the deformation of the central portion having the rectangular configuration. Therefore, without the use of a plurality of brackets, the powertrain is reliably connected to the chassis frame structure. This improves the strength of the rear mounting assembly without an increase in the overall weight of the mounting assembly. Importantly, the powertrain is reliably mounted to a chassis frame structure using the front and rear mounting assembly at an optimum location which eliminates the use of a dedicated cover member to cover the powertrain which further improves ground clearance.
[00061] According to the above architecture, one of the primary efficacies of the present invention is quick installation and removal of the powertrain due to a smaller number of connections between the housing enclosing transmission assembly and the chassis frame structure. This reduces the assembly time, thereby reduces the man-hour which effectively reduces the production cost of the vehicle.
[00062] According to the above architecture, one of the primary efficacies of the present invention is the improved riding/ driving comfort. The powertrain is connected to the chassis frame structure by mounting assembly wherein mounting assembly being configured to have the rubber damper which is capable of preventing transmission of vibration to the chassis frame structure.
[00063] The above-described embodiments, and particularly any “preferred” embodiments, are possible examples of implementations and merely set forth for a clear understanding of the principles of the invention. It will be apparent to those skilled in the art that changes in form, connection, and detail may be made therein without departing from the spirit and scope of the invention.
List of Reference

F- Front direction
R – Rear direction
L-L’ – Lateral direction
100 - Vehicle
101 - Chassis frame structure
101A - Left and right side members
101B - Cross members
101C - Central member
102 - Powertrain
102A - Prime mover
102B - Transmission assembly
102C - Motor controller
103 - Right and left axles
104 - Rear wheels
201A, 201B - Mounting assembly
201A - Front mounting assembly
201B - Rear mounting assembly
202 - Mechanical means
202A - Drive pulley
202B - Belt
202C - Driven pulley
203 - Housing
301 - First mounting structure
301A - Attachment portion
301AA - Opening in attachment portion
302 - Second mounting structure
302B - Front mounting damper
302A - Opening in front end of second member
303 - Front mounting attachment means
304 - Threaded bolt
305 - Flange portion
305A - Opening in the flange portion
306 - Third mounting structure
306A - Rear mounting damper
306B - Central portion
306BA - Openings in top face
306BB - Opening in bottom face
306C - Upper left and right side portion
306TF - Top face
306BF - Bottom face
306SF - Side face
307 - Rear cross member
307A, 307B - Brackets
308 - Primary sleeve member
309 - Rear mounting attachment means
401 - Secondary sleeve member
402 - Threaded fasteners

403 – Tertiary sleeve member
601 – Prime mover housing