Description:A Power transmission assembly for a two-wheeler vehicle
Field of the Invention
This invention, in general, relates to a power transmission assembly for a two-wheeler vehicle. More particularly, the present invention relates to a power transmission assembly which is thermally efficient and modular.
Background of the Invention
In the current times, the world is facing challenges such as global warming, climate change, deterioration of air quality and reduction in availability of fossil fuels. Electric vehicles have emerged as a solution to these above-mentioned challenges. They emit no pollutants and are eco-friendly. The propulsion of electric vehicles is functioned with the help of an efficient motor. An electric motor is powered by a battery and thus facilitates the propulsion of electric vehicles. Various designs, placements and arrangements of the motor in vehicle have been proposed by different inventions which suggest different relative configuration and connection in the vehicle so as to achieve specific objectives.
There are electric two-wheeler vehicles running on the road that have motor mounted with the front wheel or rear wheel or within the frame of the vehicle. There are definitely one or more advantages associated with such motor mounting arrangements but still they deprive vehicles from achieving some essential technical benefits such as proper temperature management of the motor, balanced centre of gravity of the vehicle, uniform vehicle load distribution, easy serviceability, modularity and maintenance friendly. In the existing two-wheeler vehicles, the positioning or placement of motor is always disturbed even in cases when the maintenance or servicing is to be carried out when the fault is in other components in proximity of the motor. This unnecessarily increases the servicing cost and complication in the vehicle. Therefore, the connection and relative placement of motor with respect to other transmission components become very crucial as there is a huge dependency on the motor in cases when any other vehicle parts in vicinity to the motor such as gears or chain drive mechanism are to be serviced.
Another problem that persists in the existing electric vehicles is with regard to the complications associated with the assembly and disassembly of the motor. The motor requires a separate structure to be specially made for its mounting and that further requires extra material and space in the vehicle which unnecessarily increases the size to be occupied by the power transmission assembly and chain drive length, and eventually makes the assembly bulky. This involves complex manufacturing process which in return increases the manufacturing and maintenance cost.
There is an additional requirement of thermal management or using high temperature resistance material for the other transmission parts due to their direct connection or close contact with the motor as there is no scope of heat loss. In order to prevent damage or deterioration of the other transmission parts, it is essential for the other transmission parts to be made out of high temperature resistance material or the same material as of the motor but this increases the material cost.
Further, chain pulling, and transmissive forces are associated with motor in the existing vehicle, which further adds complication to the power transmission assembly.
There are various other solutions that have been provided according to the existing arts, but all these solutions still have challenges because of their limited applications and inefficient functioning. It is, therefore, important to work on the alternative solution to develop power transmission assembly for electric vehicle which is compact and simple in design and functionally provides a scope for making alteration in the material of the other transmission parts without affecting the standard functionality of the power transmission assembly and obviates the complexity and challenges of the prior arts.
Summary of the Invention
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 features or essential features of the claimed subject matter. Nor is this summary intended to be used to limit the claimed subject matter’s scope.
Both the foregoing summary and the following detailed description provide examples and are explanatory only. Accordingly, the foregoing summary and the following detailed description should not be considered to be restrictive. Further, features or variations may be provided in addition to those set forth herein. For example, embodiments may be directed to various feature combinations and sub-combinations described in the detailed description.
It is one of the objectives of the present invention to provide a power transmission assembly which is compact and simple in structure.
It is one of the objectives of the present invention to provide a power transmission assembly which provides a scope to use alternative materials in making of the transmission parts other than the motor.
It is one of the objectives of the present invention to provide a power transmission assembly which is capable of maintaining temperature on its own.
It is yet another objective of the present invention to provide a motor integrated swingarm assembly which is capable of maintaining thermal conditions of the motor by way of heat dissipation.
It is one of the objectives of the present invention to provide a power transmission assembly which is maintenance and service friendly.
It is one of the objectives of the present invention to provide a power transmission assembly which is configured to have modular attachments and transmission parts.
As a preliminary matter, it will readily be understood by one having ordinary skill in the relevant art that the present disclosure has broad utility and application. As should be understood, any embodiment may incorporate only one or a plurality of the above-disclosed aspects of the disclosure and may further incorporate only one or a plurality of the above-disclosed features. Furthermore, any embodiment discussed and identified as being “preferred” is considered to be part of a best mode contemplated for carrying out the embodiments of the present disclosure. Other embodiments also may be discussed for additional illustrative purposes in providing a full and enabling disclosure. Moreover, many embodiments, such as adaptations, variations, modifications, and equivalent arrangements, will be implicitly disclosed by the embodiments described herein and fall within the scope of the present disclosure.

Accordingly, while embodiments are described herein in detail in relation to one or more embodiments, it is to be understood that this disclosure is illustrative and exemplary of the present disclosure and are made merely for the purposes of providing a full and enabling disclosure. The detailed disclosure herein of one or more embodiments is not intended, nor is to be construed, to limit the scope of patent protection afforded in any claim of a patent issuing here from, which scope is to be defined by the claims and the equivalents thereof. It is not intended that the scope of patent protection be defined by reading into any claim a limitation found herein that does not explicitly appear in the claim itself.
Additionally, it is important to note that each term used herein refers to that which an ordinary artisan would understand such term to mean based on the contextual use of such term herein. To the extent that the meaning of a term used herein—as understood by the ordinary artisan based on the contextual use of such term—differs in any way from any particular dictionary definition of such term, it is intended that the meaning of the term as understood by the ordinary artisan should prevail.

Furthermore, it is important to note that, as used herein, “a” and “an” each generally denotes “at least one,” but does not exclude a plurality unless the contextual use dictates otherwise. When used herein to join a list of items, “or” , “/” denotes “at least one of the items,” but does not exclude a plurality of items of the list. Finally, when used herein to join a list of items, “and” denotes “all of the items of the list.”
In accordance with one embodiment of the present invention, there is provided a Power transmission assembly for a two-wheeler vehicle, comprises of a motor perpendicularly situated to the length of the vehicle in a swingarm (s) and provided with an input motor shaft extending from either of its lateral sides along an axis parallel to width of the vehicle, a gear box having an input end and an output end, configured to receive power from the detachably mounted motor shaft for co-axial driving of the input end with the motor, and a kinematic linkage having a proximal input end and a distal output end, and situated between the gearbox and the motor, and indirectly connected to the motor via the gearbox, wherein said gearbox and the kinematic linkage are situated on the same side of the motor.
In accordance with one embodiment of the present invention, there is provided a Power transmission assembly for a two-wheeler vehicle, comprises of a motor perpendicularly situated to the length of the vehicle in a swingarm (s) and provided with an input motor shaft extending from either of its lateral sides along an axis parallel to width of the vehicle, a gear box having an input end and an output end, configured to receive power from the detachably mounted motor shaft for co-axial driving of the input end with the motor, and a kinematic linkage having a proximal input end and a distal output end, and situated between the gearbox and the motor, and indirectly connected to the motor via the gearbox, wherein said gearbox and the kinematic linkage are situated on the same side of the motor, wherein the gearbox is having first gear formed at input end of the gearbox, and a second gear formed at output end of the gearbox and situated backwardly along the length of the vehicle.
In accordance with one preferred embodiment of the present invention, there is provided a Power transmission assembly for a two-wheeler vehicle, comprises of a motor perpendicularly situated to the length of the vehicle in a swingarm (s) and provided with an input motor shaft extending from either of its lateral sides along an axis parallel to width of the vehicle, a gear box having an input end and an output end, configured to receive power from the detachably mounted motor shaft for co-axial driving of the input end with the motor, and a kinematic linkage having a proximal input end and a distal output end, and situated between the gearbox and the motor, and indirectly connected to the motor via the gearbox, wherein said gearbox and the kinematic linkage are situated on the same side of the motor, wherein the gearbox is having first gear formed at input end of the gearbox, and a second gear formed at output end of the gearbox and situated backwardly along the length of the vehicle, wherein the second gear is in intermeshing engagement with the first gear, wherein the first gear at the input end of the gearbox is co-axially connected with the motor shaft.
In accordance with another preferred embodiment of the present invention, there is provided a Power transmission assembly for a two-wheeler vehicle, comprises of a motor perpendicularly situated to the length of the vehicle in a swingarm (s) and provided with an input motor shaft extending from either of its lateral sides along an axis parallel to width of the vehicle, a gear box having an input end and an output end, configured to receive power from the detachably mounted motor shaft for co-axial driving of the input end with the motor, and a kinematic linkage having a proximal input end and a distal output end, and situated between the gearbox and the motor, and indirectly connected to the motor via the gearbox, wherein said gearbox and the kinematic linkage are situated on the same side of the motor, wherein the second gear at the output end of the gearbox is co-axially connected with the proximal input end of the kinematic linkage.
In accordance with another preferred embodiment of the present invention, there is provided a Power transmission assembly for a two-wheeler vehicle, comprises of a motor perpendicularly situated to the length of the vehicle in a swingarm (s) and provided with an input motor shaft extending from either of its lateral sides along an axis parallel to width of the vehicle, a gear box having an input end and an output end, configured to receive power from the detachably mounted motor shaft for co-axial driving of the input end with the motor, and a kinematic linkage having a proximal input end and a distal output end, and situated between the gearbox and the motor, and indirectly connected to the motor via the gearbox, wherein said gearbox and the kinematic linkage are situated on the same side of the motor, wherein the distal output end of the kinematic linkage is co-axially connected with the rear wheel of the vehicle
In accordance with one of the above embodiments of the present invention, wherein said swingarm (s) include a pair of swingarms mounted on either side of rear wheel of the vehicle.
In accordance with one of the above embodiments of the present invention, wherein said vehicle is an electric two-wheeler vehicle.
In accordance with another preferred embodiment of the present invention, there is provided a Power transmission assembly for a two-wheeler vehicle, comprises of a motor perpendicularly situated to the length of the vehicle in a swingarm (s) and provided with an input motor shaft extending from either of its lateral sides along an axis parallel to width of the vehicle, a gear box having an input end and an output end, configured to receive power from the detachably mounted motor shaft for co-axial driving of the input end with the motor, and a kinematic linkage having a proximal input end and a distal output end, and situated between the gearbox and the motor, and indirectly connected to the motor via the gearbox, wherein said gearbox and the kinematic linkage are situated on the same side of the motor, wherein said kinematic linkage is detachably connected with the gearbox and the rear wheel of the vehicle.
In accordance with another preferred embodiment of the present invention, there is provided a Power transmission assembly for a two-wheeler vehicle, comprises of a motor perpendicularly situated to the length of the vehicle in a swingarm (s) and provided with an input motor shaft extending from either of its lateral sides along an axis parallel to width of the vehicle, a gear box having an input end and an output end, configured to receive power from the detachably mounted motor shaft for co-axial driving of the input end with the motor, and a kinematic linkage having a proximal input end and a distal output end, and situated between the gearbox and the motor, and indirectly connected to the motor via the gearbox, wherein said gearbox and the kinematic linkage are situated on the same side of the motor, wherein said gear box is indirectly connected to the motor via the input motor shaft.
In accordance with another preferred embodiment of the present invention, there is provided a Power transmission assembly for a two-wheeler vehicle, comprises of a motor perpendicularly situated to the length of the vehicle in a swingarm (s) and provided with an input motor shaft extending from either of its lateral sides along an axis parallel to width of the vehicle, a gear box having an input end and an output end, configured to receive power from the detachably mounted motor shaft for co-axial driving of the input end with the motor, and a kinematic linkage having a proximal input end and a distal output end, and situated between the gearbox and the motor, and indirectly connected to the motor via the gearbox, wherein said gearbox and the kinematic linkage are situated on the same side of the motor, wherein said gear box is structurally housed within the swingarm (s).
In accordance with another preferred embodiment of the present invention, there is provided a Power transmission assembly for a two-wheeler vehicle, comprises of a motor perpendicularly situated to the length of the vehicle in a swingarm (s) and provided with an input motor shaft extending from either of its lateral sides along an axis parallel to width of the vehicle, a gear box having an input end and an output end, configured to receive power from the detachably mounted motor shaft for co-axial driving of the input end with the motor, and a kinematic linkage having a proximal input end and a distal output end, and situated between the gearbox and the motor, and indirectly connected to the motor via the gearbox, wherein said gearbox and the kinematic linkage are situated on the same side of the motor, wherein said swingarm (s) include a pair of swingarms mounted on either side of rear wheel of the vehicle. wherein said motor, gearbox and the kinematic linkage are situated between the pair of swingarms.
Brief Description of the accompanying drawing
Figure 1 illustrates an exploded view of the power transmission assembly for electric two wheeler vehicles.
Detailed Description of the Invention

The following detailed description refers to the accompanying drawings. Wherever possible, the same reference numbers are used in the drawings and the following description to refer to the same or similar elements. While many embodiments of the disclosure may be described, modifications, adaptations, and other implementations are possible. For example, substitutions, additions, or modifications may be made to the elements illustrated in the drawings, and the methods described herein may be modified by substituting, reordering, or adding stages to the disclosed methods. Accordingly, the following detailed description does not limit the disclosure. Instead, the proper scope of the disclosure is defined by the appended claims. The present disclosure contains headers. It should be understood that these headers are used as references and are not to be construed as limiting upon the subjected matter disclosed under the header.
Referring to Figure 1, in accordance with one preferred embodiment of the present invention, there is provided a power transmission assembly (1) which is having a motor (2) provided with an input motor shaft (3) on one of its lateral sides and adapted to connect to the input end of the gearbox (4) for coaxially driving the first gear (7) along the first axis (14) parallel to the width of the vehicle. Further, the gearbox (4) is having a second gear (8) on its output end which is backwardly situated along the length of the vehicle in the rear direction and is in intermeshing arrangement with the first gear (7) and shares the same plane as of the first gear (7), wherein the rotating axis of the motor (2) is perpendicularly situated to the length of the vehicle.
Furthermore, there is provided kinematic linkage (15) which may be a chain or belt drive system (15) driven by the gearbox (4), wherein the chain drive system (15) is having a proximal input end (9) and distal output end (10) connected via the chain (6), wherein the proximal input end (9) is coaxially driven by second gear (8) at the output end of the gearbox (4) along the second axis (17) parallel to the width of the vehicle and this further drives the distal output end (10) by way of chain and the distal output end (10) is coaxially connected to the rear wheel of the vehicle for driving. The gearbox (4) and chain drive system (15) are situated on the same side of the motor (2), wherein the chain drive system (15) is situated between the gearbox (4) and the motor (2).
Moreover, the swing arm (5) houses the integrated unit of chain drive system (15) and gearbox (4) on its inner lateral side by way of a coupling point (18), wherein the swingarm is provided with plurality of brackets (11, 12 and 13) on its periphery for joining with the chassis of the vehicle. There is provided another mounting bracket (16) connected to the rear wheel of the vehicle.
Further, chain drive length (6) is optimized and its contact with motor (2) is avoided and since there is no contact between the gearbox (4) and the motor (2) and the chain drive (15), therefore, there is no scope of heat loss, which in return opens an avenue for using alternative material in manufacturing of these components. Gearbox (4) is flexibly mounted, hence making the motor (2) a separate entity, need not to disturb mounting of motor if there is any repair or replacement or any change required in the parts in the swingarm suspension assembly, hence again making the assembly maintenance friendly with overall compact design. Also, chain pulling and transmissive forces are only with swing arm (5) and gearbox (4), hence further making the design simplified and complication is avoided in many aspects as mentioned above.

In a preferred embodiment, all the above components such as gearbox, motor and chain drive system are detachable among each other and hence provide easy servicing and maintenance.
While the invention is amenable to various modifications and alternative forms, some embodiments have been illustrated by way of example in the drawings and are described in detail above. The intention, however, is not to limit the invention by those examples and the invention is intended to cover all modifications, equivalents, and alternatives to the embodiments described in this specification.

The embodiments in the specification are described in a progressive manner and focus of description in each embodiment is the difference from other embodiments. For same or similar parts of each embodiment, reference may be made to each other.

It will be appreciated by those skilled in the art that the above description was in respect of preferred embodiments and that various alterations and modifications are possible within the broad scope of the appended claims without departing from the spirit of the invention with the necessary modifications.

Based on the description of disclosed embodiments, persons skilled in the art can implement or apply the present disclosure. Various modifications of the embodiments are apparent to persons skilled in the art, and general principles defined in the specification can be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure is not limited to the embodiments in the specification but intends to cover the most extensive scope consistent with the principle and the novel features disclosed in the specification. , Claims:We Claim:
1. A Power transmission assembly for a two-wheeler vehicle, comprises of:
a motor perpendicularly situated to the length of the vehicle in a swingarm (s) and provided with an input motor shaft extending from either of its lateral sides along an axis parallel to width of the vehicle;
a gear box having an input end and an output end, configured to receive power from the detachably mounted motor shaft for co-axial driving of the input end with the motor; and
a kinematic linkage having a proximal input end and a distal output end, and situated between the gearbox and the motor, and indirectly connected to the motor via the gearbox,
wherein said gearbox and the kinematic linkage are situated on the same side of the motor.
2. The Power transmission assembly as claimed in claim 1, wherein the gearbox is having first gear formed at input end of the gearbox, and a second gear formed at output end of the gearbox and situated backwardly along the length of the vehicle.
3. The Power transmission assembly as claimed in claim 2, wherein the second gear is in intermeshing engagement with the first gear.
4. The Power transmission assembly as claimed in claim 2, wherein the first gear at the input end of the gearbox is co-axially connected with the motor shaft.
5. The Power transmission assembly as claimed in claim 2, wherein the second gear at the output end of the gearbox is co-axially connected with the proximal input end of the kinematic linkage.
6. The Power transmission assembly as claimed in claim 1, wherein the distal output end of the kinematic linkage is co-axially connected with the rear wheel of the vehicle.
7. The Power transmission assembly as claimed in claim 1, wherein said swingarm (s) include a pair of swingarms mounted on either side of rear wheel of the vehicle.
8. The Power transmission assembly as claimed in claim 1, wherein said vehicle is an electric two-wheeler vehicle.
9. The Power transmission assembly as claimed in claim 1, wherein said kinematic linkage is detachably connected with the gearbox and the rear wheel of the vehicle.
10. The Power transmission assembly as claimed in claim 1, wherein said gear box is indirectly connected to the motor via the input motor shaft.
11. The Power transmission assembly as claimed in claim 1, wherein said gear box is structurally housed within the swingarm (s).
12. The Power transmission assembly as claimed in claim 1 and 7, wherein said motor, gearbox and the kinematic linkage are situated between the pair of swingarms.