Description:

FORM 2
THE PATENTS ACT, 1970
(39 of 1970)
&
THE PATENTS RULES, 2003
COMPLETE SPECIFICATION
[See section 10, Rule 13]

SINGLE-SIDED SWING ARM FOR A VEHICLE

HERO MOTOCORP LIMITED, an Indian Company at: The Grand Plaza, Plot No.2, Nelson Mandela Road, Vasant Kunj- Phase -II, New Delhi, India, 110 070

THE FOLLOWING SPECIFICATION PARTICULARLY DESCRIBES THE INVENTION AND THE MANNER IN WHICH IT IS TO BE PERFORMED.

FIELD OF THE INVENTION:
[001] The present invention relates to a single-sided swing arm. In particular, the invention relates to sheet metal based single-sided swing arm having reduced weight, increased torsional stiffness, and easy to manufacture. The invention further provides a vehicle incorporating the same.

BACKGROUND OF THE INVENTION:
[002] A swing arm for a vehicle supports a rear ground engaging member so as to swing in the vertical direction freely with respect to a body frame. The swing arm has a front end pivotally attached to a body frame, and pivotally supports a rear ground engaging member on a rear end that is a free end.A swing arm comes in two forms namely a single-sided swing arm and a double-sided swing arm. The single-sided swing arm comprises only one arm extending in the rearward direction supporting the rear ground engaging member while the double-sided swing arm comprises a pair of armsextending in a vehicular rearward direction supporting the rear ground engaging member.

[003] Particularly, in electric vehicles the batteries need to be kept as low as possible to reduce Centre of Gravity (CG). Also, for increasing a mileage of the electric vehicle (which is measured in kilometres per full charge), a size of the battery is increased. Increase in size of the battery results in increased size of packaging. Due to all of the above, the swing arm’slength increases by about 50% when compared to non-electric vehicles.

[004] Compared to a double-sided swing arm, a single sided swing arm is light weight and an obvious choice for an electric vehicle. However, in relation to the single-sided swing arm, increasing the length comes at a disadvantage of the reduced strength, and therefore has not been extensively adopted.

[005] Additionally, while it might be possible to attain the desired strength and desired length in a die-casted single-sided swing arm, the same has not been attained (to the best of the Applicant’s knowledge) in a sheet-metal-based single-sided swing arm. Since thecost of die-casted single-sided swing arms is higher as compared to sheet-metal-based single-sided swing arm,the later may be preferred choice (provided the desired strength and desired length are attained).

[006] Thus, there exists a need to provide single-sided swing arm for a vehicle that addresses one or more of the above mentioned disadvantages. In particular, there exists a need to provide a sheet-metal-based single-sided swing arm that addresses one or more of the above mentioned disadvantages.

SUMMARY OF THE INVENTION:
[007] This Summary is provided to introduce a selection of concepts in a simplified form that are further described below in the Detailed Description. This Summary is not intended to identify key or essential features.

[008] In one aspect of the invention, there is provided asingle-sided swing arm of a vehicle,the single-sided swing arm comprising: a first portion (102) for pivotally attaching the single- sided swing arm (100) to a frame member (24) of the vehicle (10), a second portion (104) extending from first portion (102), the second portion (104) having a set of motor supporting means (106) for supporting a motor; and a first stiffener (108) attached to the first section (102) and the second section (104).

[009] In an embodiment of the invention,first stiffener(108) is welded to thefirst portion(102)and the secondportion(104).

[0010] In another embodiment of the invention, the first portion (102) comprises a first arm (110) and a second arm (112) connected to one another so as to form a substantially “U” shape.

[0011] In yet another embodiment of the invention, each of the first arm (110) and the second arm (112) includes a first set of mounting structure (114) at a free end thereof for pivotally attaching the single-sided swing arm (100) to the frame member (24).

[0012] In still another embodiment of the invention,each of the first arm (110) and the second arm (112) includes a second set of mounting structure (116) at about an intermediate portion for attaching a main stand (32) to the single-sided swing arm (100).

[0013] In a further another embodiment of the invention,each of the first arm (110) and the second arm (112) is made of a tubular member.

[0014] In furthermore another embodiment of the invention,the first portion (102) comprises a first arm (110), a second arm (112), and a second stiffener (118) connecting the first arm (110), a second arm (112).

[0015] In anembodiment of the invention,the second stiffener (118) comprises a first triangular portion (120), a second triangular portion (122), and a third portion (124) disposed between the first triangular portion (120) and the second triangular portion (122).

[0016] In another embodiment of the invention,a first edge (126) of the first triangular portion (120) and a first edge (128) of the second triangular portion (120) are connected to the first arm (110), a second edge (130) of the first triangular portion (120) and a second edge (132) of the second triangular portion (120) are connected to the second arm (112), and a third edge (134) of the first triangular portion (120) and a third edge (136) of the second triangular portion (120) are connected to each other via the third portion (124).

[0017] In yet another embodiment of the invention,the second portion (104) comprises an open box-type structure comprising a first plate member (138) and a second plate member (140) attached to one another so as to define a front opening (142) and a rear opening (144).

[0018] In still another embodiment of the invention,the first stiffener (108) comprises a third triangular portion (146), a fourth triangular portion (148), and a sixth portion (150) disposed between the third triangular portion (146) and the fourth triangular portion (148).

[0019] In a further embodiment of the invention,a first edge (152) of the third triangular portion (146) and a first edge (154) of the fourth triangular portion (148) are connected to the second portion (104), a second edge (156) of the third triangular portion (146) and a second edge (158) of the fourth triangular portion (148) are connected to the first portion (102), and a third edge (160) of the third triangular portion (146) and a third edge (162) of the fourth triangular portion (148) are connected to each other via the sixth portion (150).

[0020] In a furthermore embodiment of the invention,the first stiffener (108) further comprises a seventh portion (164) extending in a vehicle width direction from the sixth portion (150), the seventh portion (164) being connected to the first portion (102).

[0021] In an embodiment of the invention, the second portion (104) comprises at least one aperture (166) for allowing a wire to pass therethrough, the wire supplying electrical energy to the motor (36).

[0022] In one aspect of the invention, there is provided avehicle (10) comprising:a frame member (24), connected to the head pipe (18) and extends in a rearward direction of the vehicle (10);a rear ground engaging member (28), coupled to the main frame via a cushioning element (30); a main stand (32), extends to ground to support the vehicle (10) at the extended position;one or more batteries (34) to provide electrical energy;a motor (36), transforms the electrical energy into mechanical energy, which is then transferred to the rear ground engaging member (28); anda single-sided swing arm (100), coupled to the frame member (24); a single-sided swing arm (100) comprises: a first portion (102) for pivotally attaching the single- sided swing arm (100) to a frame member (24) of the vehicle (10), a second portion (104) extending from first portion (102), the second portion (104) having a set of motor supporting means (106) for supporting a motor (36); and a first stiffener (108) attached to the first section (102) and the second section (104).

[0023] In an embodiment of the invention, the motor (36) is traction motor and is connected to wheel.

[0024] One advantage of the invention includes the single-sided swing arm has increased torsional stiffness and strength. Still another advantage of the invention includes an increased ease to manufacture the single-sided swing arm. Yet another advantage of the invention includes a substantial reduction the cost of manufacturing the single-sided swing arm, as the single-sided swing arm is a sheet-metal-based single-sided swing arm. Still another advantage of the invention includes a reduction in a weight of the single-sided swing arm as, as compared to a double-sided swing arm. Still another advantage of the invention includes a reduction the weight of the vehicle, attributable to a reduced weight of the single-sided swing arm, as compared to a double-sided swing arm. A furthermore advantage of the invention includes a reduction in the cost of manufacturing the vehicle, attributable to one or more of the aforesaid advantages.

[0025] To further clarify the advantages and features of the invention, a more particular description of the invention will be rendered by reference to specific embodiments thereof, which is illustrated in the appended drawings. It is appreciated that these drawings depict only typical embodiments of the invention and are therefore not to be considered limiting of its scope. The invention will be described and explained with additional specificity and detail with the accompanying drawings.

BRIEF DESCRIPTION OF THE FIGURES:
[0026] In order that the invention may be readily understood and put into practical effect, reference will now be made to exemplary embodiments as illustrated with reference to the accompanying drawings, where like reference numerals refer to identical or functionally similar elements throughout the separate views. The figures together with a detailed description below, are incorporated in and form part of the specification, and serve to further illustrate the embodiments and explain various principles and advantages, in accordance with the present invention where:

[0027] Figure1 illustrates a side view of an exemplary vehicle, in accordance with an embodiment of the present invention;

[0028] Figure 2illustrates a perspectiveview of a single-sidedswing arm coupled to the frame member of the vehicle,in accordance with an embodiment of the present invention;

[0029] Figure 3illustrates an exploded view of the single–sided swing arm,in accordance with an embodiment of the present invention;

[0030] Figure 4illustrates a perspective view of thesingle–sided swing arm, in accordance with an embodiment of the present invention;

[0031] Figure 5(a) illustrates afirst perspective view of the second stiffener, in accordance with an embodiment of the present invention;

[0032] Figure 5(b) illustrates asecond perspective view of the second stiffener, in accordance with an embodiment of the present invention;

[0033] Figure 6illustrates an exploded view of the second stiffener, in accordance with an embodiment of the present invention;

[0034] Figure 7 illustrates an exploded view of the second portion, in accordance with an embodiment of the present invention;

[0035] Figure 8 illustrates aperspective view of the first stiffener, in accordance with an embodiment of the present invention; and

[0036] Figure 9illustrates an exploded view of the first stiffener, in accordance with an embodiment of the present invention.

[0037] It may be noted that to the extent possible, like reference numerals have been used to represent like elements in the drawings. Further, skilled artisans will appreciate that elements in the drawings are illustrated for simplicity and may not have been necessarily been drawn to scale. For example, the dimensions of some of the elements in the drawings may be exaggerated relative to other elements to help to improve understanding of aspects of the present invention. Furthermore, one or more elements may have been represented in the drawings by conventional symbols, and the drawings may show only those specific details that are pertinent to understanding the embodiments of the present invention so as not to obscure the drawings with details that will be readily apparent to those of ordinary skill in the art having the benefit of the description herein.

Detailed Description of the Invention:
[0038] For the purpose of promoting an understanding of the principles of the invention, reference will now be made to the embodiment illustrated in the drawings and specific language will be used to describe the same. It will nevertheless be understood that no limitation of the scope of the invention is thereby intended, such alterations and further modifications in the illustrated device, and such further applications of the principles of the invention as illustrated therein being contemplated as would normally occur to one skilled in the art to which the invention relates.

[0039] It will be understood by those skilled in the art that the foregoing general description and the following detailed description are explanatory of the invention and are not intended to be restrictive thereof.

[0040] As used in the description herein and throughout the claims that follow, the meaning of “a,” “an,” and “the” includes plural reference unless the context clearly dictates otherwise. Also, as used in the description herein, the meaning of “in” includes “in” and “on” unless the context clearly dictates otherwise.

[0041] Reference throughout this specification to “an aspect”, “another aspect” or similar language means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, appearances of the phrase “in an embodiment”, “in another embodiment”, and similar language throughout this specification may, but do not necessarily, all refer to the same embodiment.

[0042] The terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that one or more devices or sub-systems or elements or structures or components proceeded by "comprises... a" does not, without more constraints, preclude the existence of other devices or other sub-systems or other elements or other structures or other components or additional devices or additional sub-systems or additional elements or additional structures or additional components.

[0043] As used herein, and unless the context dictates otherwise, the terms "coupled to", “connected to”, “operably connected to”, and “operatively connected to” are intended to include both direct connection / coupling (in which two elements that are coupled / connected to each other contact each other) and indirect coupling / connection (in which at least one additional element is located between the two elements). Therefore, the terms "coupled to" and "coupled with" are used synonymously. Similarly, the terms “connected to” and “connected with” are used synonymously.

[0044] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one ordinary skilled in the art to which this invention belongs. The device, methods, and examples provided herein are illustrative only and not intended to be limiting.

[0045] The use of any and all examples, or exemplary language (e.g. “such as”) provided with respect to certain embodiments herein is intended merely to better illuminate the invention and does not pose a limitation on the scope of the invention otherwise claimed. No language in the specification should be construed as indicating any non-claimed element as being essential to the practice of the invention.

[0046] Groupings of alternative elements or embodiments of the invention disclosed herein are not to be construed as limitations. Each group member can be referred to and claimed individually or in any combination with other members of the group or other elements found herein. One or more members of a group can be included in, or deleted from, a group for reasons of convenience and/or patentability. When any such inclusion or deletion occurs, the specification is herein deemed to contain the group as modified thus fulfilling the written description of all Markush groups used in the appended claims.

[0047] Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

[0048] While the present invention is illustrated in the context of a vehicle, however, cover and aspects and features thereof can be used with other types of vehicles as well. The terms “vehicle”, “two wheeled vehicle” and “motorcycle” have been interchangeably used throughout the description. The term “vehicle” comprises vehicles such as motorcycles, scooters, bicycles, mopeds, scooter type vehicles, All-Terrain Vehicles (ATV) and the like.

[0049] The terms “front / forward”, “rear / rearward / back / backward”, “up / upper / top”, “down / lower / lower ward / downward / bottom”, used therein represents the directions as seen from a vehicle driver sitting astride and these directions are referred by arrows F, R, U, and D, respectively in the Figures.

[0050] Referring to Figure 1, there is illustrated a side view of a first side of a vehicle (10).The vehicle (10) comprises a front end structure (12), a rear end structure (14), and afootboard (16). The front end structure (12) forms the front portion of the vehicle (10). Therear end structure (14) forms the rear portion of the vehicle (10). The footboard (16) liesbetween the front end structure (12) and the rear end structure (14).

[0051] The front end structure (12) comprises the vehicle comprises a head pipe (18) supporting the front fork (20) in a steerable manner. The front fork (20) supports a front ground engaging member (22).

[0052] The vehicle (10) further comprises a frame member (24) is connected to the head pipe (18) and the frame member (24) extends in a rearward direction of the vehicle (10). The vehicle (10) further comprises a seat (26) supported by the frame member (24). The vehicle (10) further comprises a rear ground engaging member (28) disposed below the seat (26). The rear ground engaging member (28) may be coupled to frame member (24) at plurality of locations. For instance, the rear ground engaging member (28) may be coupled to the main frame via a cushioning element (30) and via a single-sided swing arm (100). The vehicle (10) may further comprise a main stand (32) which is adapted for movement between an extended position and a retracted position, the main stand (32) extends to ground to support the vehicle (10) at the extended position and the main stand (32) does not extend to the ground at the retracted position.The vehicle (10) may further comprise additional elements which are not specifically shown in the Figure 1.

[0053] Now referring to Figure 2, there is illustrated a perspective view of a single-sided swing arm (100) attached to the frame member (24), in accordance with an embodiment of the present invention.The frame member (24) also supports one or more batteries (34) that may provide electrical energy to a motor (36). The motor (36) transforms the electrical energy into mechanical energy, which is then transferred to the rear ground engaging member (28) (best seen in Figure 1). The rear ground engaging member (28) is coupled to the motor (36) and the motor (36) is coupled to the frame member (24) via cushioning element (30). The motor (36) is additionally coupled to one end of the single-sided swing arm (100), while the other end of the single-sided swing arm (100) is coupled to the frame member (24).

[0054] Now referring to Figure 3, there is illustrated an exploded view of the single-sided swing arm (100) in accordance with an embodiment of the invention. In a particular embodiment of the invention, the single-sided swing arm (100) comprises a first portion (102), a second portion (104) and a first stiffener (108). The first portion (102) pivotally attaches the single-sided swing arm (100) to the frame member (24) of the vehicle (10). The second portion (104) extending from first portion (102) and supports the motor (36). The first stiffener (108) couples the first portion (102) to the second portion (104).

[0055] Now referring to Figure 4, there is illustrated a perspective view of the single-sided swing arm (100) of the vehicle (10), in accordance with an embodiment of the present invention. The first portion (102) comprises a first arm (110) and a second arm (112) that are connected to one another to form a substantially “U” shape. In an embodiment of the invention, the first arm (110) and the second arm (112) of the single sided swing arm are joining together by welding.There may additionally be used a second stiffener (118) for coupling the first arm (110) and the second arm (112).

[0056] The first arm (110) and the second arm (112) includes a first set of mounting structure (114) and a second set of mounting structure (116). Each of the first set of mounting structure (114) are attached at a free end of the first arm (110) and the second arm (112) for pivotally attaching the single-sided swing arm (100) to the frame member (24).Each of the second set of mounting structure (116) is placed at about an intermediate portion of the first arm (110) and the second arm (112). A main stand (32) may be coupled to the second set of mounting structure (116).

[0057] The second portion (104) has a set of motor supporting means (106) for supporting the motor (36). The set of motor supporting means (106) may be in the form of apertures adapted to receive a set of fastening means for coupling the motor (36) to the second portion (104).

[0058] Now referring to Figure 5(a) and Figure 5(b), there is illustrated a first perspective view and a second perspective view of the second stiffener (118), in accordance with an embodiment of the present invention. The second stiffener (118) comprises a first triangular portion (120), a second triangular portion (122), and a third portion (124). The third portion (124) is disposed between the first triangular portion (120) and the second triangular portion (122).

[0059] Now referring to Figure 6,there is illustrated an exploded view of the second stiffener (118), in accordance with an embodiment of the present invention.It can be seen that the first triangular portion (120) comprises first edge (126), a second edge (130) and a third edge (134).Likewise, the second triangular portion (122)comprisesa first edge (128), a second edge (132) and a third edge (136).In an embodiment of the invention, a first edge (126) of the first triangular portion (120) and a first edge (128) of the second triangular portion (122) are connected to the first arm (110).In an embodiment of the invention, the second edge (130) of the first triangular portion (120) and the second edge (132) of the second triangular portion (122) are connected to the second arm (112).In an embodiment of the invention, the third edge (134) of the first triangular portion (120) and a third edge (136) of the second triangular portion (122) are connected to each other via the third portion (124).

[0060] Figure 7 illustrates an exploded view of second portion (104), in accordance with an embodiment of the present invention.The second portion (104) comprises an open box-type structure comprising a first plate member (138) and a second plate member (140) attached to one another so as to define a front opening (142) and a rear opening (144).

[0061] Now referring to Figure 8, there is illustratedaperspective view of the first stiffener (108), in accordance with an embodiment of the present invention. The first stiffener (108) comprises a third triangular portion (146), a fourth triangular portion (148), and a sixth portion (150). The sixth portion (150) is disposed between the third triangular portion (146) and the fourth triangular portion (148). In an embodiment of the invention, the first stiffener (108) may optionally comprise a seventh portion (164) extending in a vehicle width direction from the sixth portion (150).

[0062] Figure 9 illustrates an exploded view of the first stiffener (108), in accordance with an embodiment of the present invention.In an embodiment of the invention, the third triangular portion (146) comprises a first edge (152), a second edge (156) and a third edge (160).In an embodiment of the invention, fourth triangular portion (148) comprises a first edge (154), a second edge (158) and a third edge (162).In an embodiment of the invention, the first edge (152) of the third triangular portion (146) and a first edge (154) of the fourth triangular portion (148) are connected to the second portion (104). In an embodiment of the invention, the second edge (156) of the third triangular portion (146) and the second edge (158) of the fourth triangular portion (148) are connected to the first portion (102).In an embodiment of the invention, the third edge (160) of the third triangular portion (146) and the third edge (162) of the fourth triangular portion (148) are connected to each other via the sixth portion (150). In an embodiment of the invention, the seventh portion (164) may be connected to the first portion (102).

[0063] In an embodiment of the invention, the advantage of using a first stiffener (108) is to increase the torsional stiffness of the sheet-metal-based single-sided swing arm.

[0064] In an embodiment of the invention, the second portion (104) comprises at least one aperture (166) for allowing a wire to pass therethrough, the wire supplying electrical energy to the motor (36).

[0065] One advantage of the invention includes the single-sided swing arm has increased torsional stiffness and strength. Still another advantage of the invention includes an increased ease to manufacture the single-sided swing arm. Yet another advantage of the invention includes a substantial reduction the cost of manufacturing the single-sided swing arm, as the single-sided swing arm is a sheet-metal-based single-sided swing arm. Still another advantage of the invention includes a reduction in a weight of the single-sided swing arm as, as compared to a double-sided swing arm. Still another advantage of the invention includes a reduction the weight of the vehicle, attributable to a reduced weight of the single-sided swing arm, as compared to a double-sided swing arm. A furthermore advantage of the invention includes a reduction in the cost of manufacturing the vehicle, attributable to one or more of the aforesaid advantages.

[0066] While specific language has been used to describe the disclosure, any limitations arising on account of the same are not intended. As would be apparent to a person in the art, various working modifications may be made to the method in order to implement the inventive concept as taught herein.

[0067] The figures and the forgoing description give examples of embodiments. Those skilled in the art will appreciate that one or more of the described elements may well be combined into a single functional element. Alternatively, certain elements may be split into multiple functional elements. Elements from one embodiment may be added to another embodiment. For example, orders of processes described herein may be changed and are not limited to the manner described herein. Moreover, the actions of any flow diagram need not be implemented in the order shown; nor do all of the acts necessarily need to be performed. Also, those acts that are not dependent on other acts may be performed in parallel with the other acts. The scope of embodiments is by no means limited by these specific examples.
, Claims:WE CLAIM:

1. A single-sided swing arm (100) for a vehicle (10), the swing arm (100) comprising:
a first portion (102) for pivotally attaching the single- sided swing arm (100) to a frame member (24) of the vehicle (10),
a second portion (104) extending from first portion (102), the second portion (104) having a set of motor supporting means (106) for supporting a motor (36); and a first stiffener (108) attached to the first portion (102) and the second portion (104).

2. The single-sided swing arm as claimed in claim 1, wherein first stiffener (108) is welded to the first portion (102)and the second portion(104).

3. The single-sided swing arm as claimed in claim 1, wherein the first portion (102) comprises a first arm (110) and a second arm (112) connected to one another so as to form a substantially “U” shape.

4. The single-sided swing arm as claimed in claim 3, wherein each of the first arm (110) and the second arm (112) includes a first set of mounting structure (114) at a free end thereof for pivotally attaching the single-sided swing arm (100) to the frame member (24).

5. The single-sided swing arm as claimed in claim 3, wherein each of the first arm (110) and the second arm (112) includes a second set of mounting structure (116) at about an intermediate portion for attaching a main stand (32) to the single-sided swing arm (100).

6. The single-sided swing arm as claimed in claim 3, wherein each of the first arm (110) and the second arm (112) is made of a tubular member.

7. The single-sided swing arm as claimed in claim 3, wherein the first portion (102) comprises a first arm (110), a second arm (112), and a second stiffener (118) connecting the first arm (110), a second arm (112).

8. The single-sided swing arm as claimed in claim 7, wherein the second stiffener (118) comprises a first triangular portion (120), a second triangular portion (122), and a third portion (124) disposed between the first triangular portion (120) and the second triangular portion (122).

9. The single-sided swing arm as claimed in claim 8, wherein a first edge (126) of the first triangular portion (120) and a first edge (128) of the second triangular portion (120) are connected to the first arm (110), a second edge (130) of the first triangular portion (120) and a second edge (132) of the second triangular portion (120) are connected to the second arm (112), and a third edge (134) of the first triangular portion (120) and a third edge (136) of the second triangular portion (120) are connected to each other via the third portion (124).

10. The single sided swing arm as claimed in claim 1, wherein the second portion (104) comprises an open box-type structure comprising a first plate member (138) and a second plate member (140) attached to one another so as to define a front opening (142) and a rear opening (144).

11. The single-sided swing arm as claimed in claim 1, wherein the first stiffener (108) comprises a third triangular portion (146), a fourth triangular portion (148), and a sixth portion (150) disposed between the third triangular portion (146) and the fourth triangular portion (148).

12. The single-sided swing arm as claimed in claim 11, wherein a first edge (152) of the third triangular portion (146) and a first edge (154) of the fourth triangular portion (148) are connected to the second portion (104), a second edge (156) of the third triangular portion (146) and a second edge (158) of the fourth triangular portion (148) are connected to the first portion (102), and a third edge (160) of the third triangular portion (146) and a third edge (162) of the fourth triangular portion (148) are connected to each other via the sixth portion (150).

13. The single-sided swing arm as claimed in claim 11, wherein the first stiffener (108) further comprises a seventh portion (164) extending in a vehicle width direction from the sixth portion (150), the seventh portion (164) being connected to the first portion (102).

14. The single-sided swing arm as claimed in claim 1, wherein the second portion (104) comprises at least one aperture (166) for allowing a wire to pass therethrough, the wire supplying electrical energy to the motor (36).

15. A vehicle (10) comprising:
a frame member (24),connected to the head pipe (18) and extends in a rearward direction of the vehicle (10);
a rear ground engaging member (28), coupled to the main frame via a cushioning element (30)
a main stand (32), extends to ground to support the vehicle (10) at the extended position;
one or more batteries (34) to provide electrical energy;
a motor (36), transforms the electrical energy into mechanical energy, which is then transferred to the rear ground engaging member (28); and
a single-sided swing arm (100), coupled to the frame member (24); a single-sided swing arm (100) comprises:
a first portion (102) for pivotally attaching the single- sided swing arm (100) to a frame member (24) of the vehicle (10),
a second portion (104) extending from first portion (102), the second portion (104) having a set of motor supporting means (106) for supporting a motor (36); and
a first stiffener (108) attached to the first section (102) and the second section (104).

16. The vehicle as claimed in claim 14, wherein the motor (36) is traction motor and is connected to wheel.