CN220363433U - Motor transmission structure of electric vehicle - Google Patents
Motor transmission structure of electric vehicle Download PDFInfo
- Publication number
- CN220363433U CN220363433U CN202322092136.7U CN202322092136U CN220363433U CN 220363433 U CN220363433 U CN 220363433U CN 202322092136 U CN202322092136 U CN 202322092136U CN 220363433 U CN220363433 U CN 220363433U
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- motor
- electric vehicle
- beam body
- sprocket
- shaft
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- 230000005540 biological transmission Effects 0.000 title claims abstract description 35
- 239000006096 absorbing agent Substances 0.000 claims description 2
- 230000035939 shock Effects 0.000 claims description 2
- 230000017525 heat dissipation Effects 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/64—Electric machine technologies in electromobility
Abstract
The utility model discloses a motor transmission structure of an electric vehicle, which comprises a vehicle frame, a motor, a bottom fork and a rear hub assembly, wherein the rear hub assembly is rotationally connected with the rear part of the bottom fork; the left end and the right end of the motor shaft are respectively and rotatably connected with the front part of the bottom fork, and the left end and the right end of the motor shaft are respectively and fixedly connected with the lower part of the frame through a motor fixing seat; the motor comprises a motor shell, and is characterized in that a first sprocket is arranged on the motor shell, a second sprocket is arranged on the hub assembly, and the first sprocket is in transmission connection with the second sprocket. According to the utility model, the motor shaft does not rotate, and the power transmission is realized by rotating the motor shell, so that the chain is not tensioned due to the up-and-down swing of the bottom fork under the condition of bumpy road conditions, thereby ensuring higher efficient transmission efficiency and good heat dissipation performance of the motor.
Description
Technical Field
The utility model relates to an electric vehicle, in particular to a motor transmission structure of the electric vehicle.
Background
The electric vehicle is a preferred transportation means for short-distance commuting of wide consumers due to the advantages of high cost performance, small occupied space, convenient operation and the like. The electric vehicle generally comprises a motor shell fixed on a vehicle frame, and a rear hub assembly fixed at the rear part of a bottom fork through a transmission structure such as a chain and the like, wherein the rear hub assembly drives a rear wheel to rotate so as to realize the movement of the electric vehicle. The front part of the bottom fork is connected with the frame, when the electric vehicle jolts, the relative position of the axis of the rear hub assembly and the axis of the motor output shaft is changed due to the up-down swing of the bottom fork, so that the chain tensioning influences the transmission, the heat dissipation of the motor often depends on fins outside the motor shell, and the heat dissipation effect is closely related to the structure of the fins.
CN112455596a discloses a transmission structure and an electric motorcycle, wherein the transmission structure comprises: the middle rotating shaft is connected to the frame of the electric motorcycle, two ends of the middle rotating shaft are respectively connected with a first transmission part and a second transmission part, and the first transmission part is in transmission connection with a motor of the electric motorcycle; the rear wheel is connected to the frame, a third transmission part is arranged on the rear wheel, the second transmission part is in transmission connection with the third transmission part, and the transmission ratio is larger than one. The electric motorcycle is rotationally connected with the rear bottom fork through the middle rotating shaft, the rear wheel is connected with the rear bottom fork, the rear bottom fork rotates around the middle rotating shaft, the axial center distance between the middle rotating shaft and the rear wheel is guaranteed to be stable, and needless to say, the technical scheme disclosed in the patent document is an beneficial attempt in the technical field, but the production cost can be improved through the multistage transmission mode, and the assembly efficiency is reduced.
Disclosure of Invention
Therefore, the utility model aims to provide the motor transmission structure of the electric vehicle, wherein the motor shaft does not rotate, the power transmission is realized by rotating the motor shell, the relative position of the axis of the first chain wheel and the axis of the second chain wheel is unchanged, and under the condition of bumpy road conditions, the chain can not be tensioned due to up-and-down swing of the bottom fork, so that the higher efficient transmission efficiency is ensured, and the heat dissipation performance of the motor is good.
The utility model relates to a motor transmission structure of an electric vehicle, which comprises a vehicle frame, a motor, a bottom fork and a rear hub assembly, wherein the rear hub assembly is rotationally connected with the rear part of the bottom fork; the left end and the right end of the motor shaft are respectively and rotatably connected with the front part of the bottom fork, and the left end and the right end of the motor shaft are respectively and fixedly connected with the lower part of the frame through a motor fixing seat; the motor comprises a motor shell, and is characterized in that a first sprocket is arranged on the motor shell, a second sprocket is arranged on the hub assembly, and the first sprocket is in transmission connection with the second sprocket.
Further, the bottom fork comprises a left support and a right support, the left support comprises a left Liang Tiyi and a left connecting frame, the right support comprises a right Liang Tiyi and a right connecting frame, the left part of the left connecting frame is connected with the middle part of the left beam body, the right part of the left connecting frame is connected with the left part of the right connecting frame, and the right part of the right connecting frame is connected with the middle part of the right beam body.
Further, the bottom fork further comprises a rear mounting shaft, and the left end and the right end of the rear mounting shaft are fixedly connected with the rear part of the left beam body and the rear part of the right beam body respectively.
Further, a front support is respectively arranged at the front part of the left beam body and the front part of the right beam body, and the motor shaft is connected with an inner hole of the front support through a bearing; the rear hub assembly is rotatably connected with the rear mounting shaft.
Further, the middle parts of the two motor fixing seats are respectively provided with a mounting hole used for being connected with the motor shaft, and the mounting holes are communicated in the left-right direction.
Further, the left part and the right part of the motor shaft are respectively provided with external threads for being in threaded connection with the mounting hole.
Further, a plurality of first fixing holes are formed in the two motor fixing seats along the circumferential direction of the mounting holes at intervals, second fixing holes are formed in the positions, corresponding to the first fixing holes, on the frame respectively, and the frame is connected with the motor fixing seats through bolts penetrating through the first fixing holes and being in threaded connection with the corresponding second fixing holes.
Further, a left support protruding upwards is arranged on the left connecting frame, a right support protruding upwards is arranged on the right connecting frame, and the left support and the right support form a shock absorber installation seat.
Further, the left beam body and the right beam body are provided with lightening holes.
Further, the number of teeth of the first sprocket is smaller than the number of teeth of the second sprocket.
The beneficial effects of the utility model are as follows:
(1) The motor shaft does not rotate, and the power transmission is realized by rotating the motor shell;
(2) The relative positions of the axis of the first chain wheel and the axis of the second chain wheel are unchanged, and under the condition of bumpy road conditions, the chain cannot be tensioned due to up-and-down swing of the bottom fork, so that higher efficient transmission efficiency is ensured;
(3) When the motor shell rotates, the heat exchange between the heat generated in the motor and the atmosphere can be effectively carried out timely, and the heat dissipation performance of the motor is good, so that the power reduction of the motor caused by overhigh temperature rise is ensured.
Drawings
In order to make the objects, technical solutions and advantageous effects of the present utility model more clear, the present utility model provides the following drawings for description:
FIG. 1 is a schematic diagram of the structure of the present utility model;
FIG. 2 is an enlarged partial schematic view of FIG. 1;
FIG. 3 is a left side view of the present utility model;
FIG. 4 is a top view of FIG. 3;
fig. 5 is a schematic view of section A-A of fig. 3.
The figures are marked as follows: the bicycle comprises a frame 1, a bottom fork 2, a left beam body 21, a left connecting frame 22, a right beam body 23, a right connecting frame 24, a rear mounting shaft 25, a front support 26, a bearing 27, a left support 28, a right support 29, a weight-reducing hole 210, a rear hub assembly 3, a motor shaft 4, external threads 41, a motor housing 5, a motor fixing seat 6, a first sprocket 7, a second sprocket 8 and bolts 9.
Detailed Description
The technical scheme of the utility model is described in detail below with reference to the accompanying drawings and examples.
As shown in fig. 1-5, the motor transmission structure of the electric vehicle in this embodiment includes a frame 1, a motor, a bottom fork 2, and a rear hub assembly 3, where the rear hub assembly 3 is rotatably connected to a rear portion of the bottom fork 2, the motor includes a motor shaft 4 and a motor housing 5 capable of rotating relative to the motor shaft 4, and left and right ends of the motor shaft 4 respectively extend out of the motor housing 5; the left end and the right end of the motor shaft 4 are respectively and rotatably connected with the front part of the bottom fork 2, and the left end and the right end of the motor shaft 4 are respectively and fixedly connected with the lower part of the frame 1 through a motor fixing seat 6; the motor housing 5 is provided with a first sprocket 7, the hub assembly is provided with a second sprocket 8, and the first sprocket 7 is in transmission connection with the second sprocket 8. Specifically, the first sprocket 7 and the second sprocket 8 may be driven by a chain (the chain is not shown in the drawings), the first sprocket 7 and the motor housing 5 may be connected by a spline, and the frame 1 may be a split type left and right bracket structure or an inverted U-shaped integral bracket structure.
The motor shaft 4 of the motor transmission structure of the electric vehicle does not rotate, and power transmission is realized by rotating the motor housing 5, specifically, when the motor works, the motor shaft 4 is fixed, the motor housing 5 rotates, the first chain wheel 7 can be driven to coaxially rotate by rotating the motor housing 5, the first chain wheel 7 drives the second chain wheel 8 to rotate through a chain, the rear wheel hub assembly 3 is driven to rotate through the second chain wheel 8, and the rear wheel hub assembly 3 drives the rear wheel to rotate, so that the movement of the electric vehicle is realized. The motor shell 5 and the rotation axis of the first sprocket 7 are all collinear with the central axis of the motor shaft 4, the relative position of the central axis of the motor shaft 4 and the bottom fork 2 is unchanged, the rear hub assembly 3 is connected with the bottom fork 2, and the relative position of the rotation axis of the second sprocket 8 and the bottom fork 2 is unchanged, so that the relative position of the axis of the first sprocket 7 and the axis of the second sprocket 8 is unchanged, and under the condition of bumpy road conditions, the chain cannot be tensioned due to up-and-down swing of the bottom fork 2, thereby ensuring higher efficient transmission efficiency. In addition, when the motor shell 5 rotates, heat generated in the motor can be timely and effectively exchanged with the atmosphere, and the heat dissipation performance of the motor is good, so that the power reduction of the motor caused by overhigh temperature rise is ensured.
In this embodiment, the bottom fork 2 includes a left bracket and a right bracket, the left bracket includes a left beam 21 and a left connecting frame 22, the right bracket includes a right beam 23 and a right connecting frame 24, a left portion of the left connecting frame 22 is connected with a middle portion of the left beam 21, a right portion of the left connecting frame 22 is connected with a left portion of the right connecting frame 24, and a right portion of the right connecting frame 24 is connected with a middle portion of the right beam 23; in this embodiment, the bottom fork 2 further includes a rear mounting shaft 25, and left and right ends of the rear mounting shaft 25 are fixedly connected to the rear portion of the left beam 21 and the rear portion of the right beam 23, respectively; in this embodiment, a front support 26 is respectively disposed at the front part of the left beam 21 and the front part of the right beam 23, and the motor shaft 4 is connected to the inner hole of the front support 26 through a bearing 27; the rear part of the left beam 21 and the rear part of the right beam 23 are respectively connected with the rear hub assembly 3.
The bottom fork 2 is formed by connecting a left bracket and a right bracket, the left bracket and the right bracket can be separated, then the motor and the rear hub assembly 3 are arranged between the left bracket and the right bracket, the left end and the right end of the motor shaft 4 are respectively connected with the inner holes of the front support 26 through bearings 27, then the rear mounting shaft 25 penetrates through the left beam body 21, the rear hub assembly 3 and the right beam body 23, the left end and the right end of the rear mounting seat are respectively fixedly connected with the left beam body 21 and the right beam body 23, and then the left connecting frame 22 and the right connecting frame 24 are connected, so that the connection of the bottom fork 2, the motor and the rear hub assembly 3 is realized, the installation is simple and convenient, the assembly difficulty can be reduced, and the assembly efficiency is improved.
In this embodiment, the middle parts of the two motor fixing seats 6 are respectively provided with a mounting hole for connecting with the motor shaft 4, and the mounting holes are penetrated along the left-right direction. The axis of the mounting hole, the axis of the motor shaft 4 and the axis of the inner hole of the front support 26 are all coincident, and when the bottom fork 2 swings up and down, the axis of the mounting hole, the axis of the motor shaft 4 and the axis of the inner hole of the front support 26 synchronously move.
In this embodiment, the left and right parts of the motor shaft 4 are provided with external threads 41 for threaded connection with the mounting hole; in this embodiment, a plurality of first fixing holes are formed in the two motor fixing seats 6 at intervals along the circumferential direction of the mounting hole, second fixing holes are respectively formed in positions, corresponding to the first fixing holes, on the frame 1, and bolts 9 penetrate through the first fixing holes and are in threaded connection with the corresponding second fixing holes, so that the frame 1 is connected with the motor fixing seats 6.
In this embodiment, the left connecting frame 22 is provided with a left support 28 protruding upwards, the right connecting frame 24 is provided with a right support 29 protruding upwards, and the left support 28 and the right support 29 form a damper mounting seat.
In this embodiment, the left beam 21 and the right beam 23 are provided with lightening holes 210.
In this embodiment, the number of teeth of the first sprocket 7 is smaller than the number of teeth of the second sprocket 8.
The motor transmission structure of the electric vehicle in the embodiment comprises the following steps when being assembled:
s1, connecting a bottom fork 2, a motor and a rear hub assembly 3;
firstly separating a left bracket from a right bracket, then placing a motor and a rear hub assembly 3 between the left bracket and the right bracket, respectively connecting the left end and the right end of a motor shaft 4 with the inner holes of a front support 26 through bearings 27, then penetrating a rear mounting shaft 25 through a left beam body 21, a rear hub assembly 3 and a right beam body 23, respectively fixedly connecting the left end and the right end of a rear mounting seat with the left beam body 21 and the right beam body 23, and then connecting a left connecting frame 22 with a right connecting frame 24 to realize the connection of a bottom fork 2, the motor and the rear hub assembly 3;
s2, connecting a motor, a motor fixing seat 6 and a frame 1;
firstly, mounting grooves on the left side and the right side of the lower portion of a frame 1 are inserted into a motor shaft 4, then two motor mounting seats are respectively connected with the left end and the right end of the motor shaft 4 in a threaded mode, after the motor mounting seats are screwed, the motor mounting seats on the left side are connected with the frame 1 through three bolts 9, the motor mounting seats on the right side are connected with the frame 1 through three other bolts 9, and the concrete operation of connection is that the bolts 9 penetrate through first fixing holes and are in threaded connection with corresponding second fixing holes.
Finally, it is noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications and equivalents may be made thereto without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered by the scope of the claims of the present utility model.
Claims (10)
1. The utility model provides an electric motor car motor drive structure, includes frame (1), motor, bottom fork (2) and back wheel hub assembly (3), back wheel hub assembly (3) with the rear portion of bottom fork (2) rotates and is connected, its characterized in that: the motor comprises a motor shaft (4) and a motor shell (5) capable of rotating relative to the motor shaft (4), and the left end and the right end of the motor shaft (4) respectively extend out of the motor shell (5); the left end and the right end of the motor shaft (4) are respectively and rotatably connected with the front part of the bottom fork (2), and the left end and the right end of the motor shaft (4) are respectively and fixedly connected with the lower part of the frame (1) through a motor fixing seat (6); the motor is characterized in that a first sprocket (7) is arranged on the motor shell (5), a second sprocket (8) is arranged on the hub assembly, and the first sprocket (7) is in transmission connection with the second sprocket (8).
2. The electric vehicle motor drive structure of claim 1, wherein: bottom fork (2) include left socle and right branch frame, the left socle includes left beam body (21) and left link (22), the right branch frame includes right beam body (23) and right link (24), the left part of left link (22) with the middle part of left beam body (21) is connected, the right part of left link (22) with the left part of right link (24) is connected, the right part of right link (24) with the middle part of right beam body (23) is connected.
3. The electric vehicle motor drive structure of claim 2, wherein: the bottom fork (2) further comprises a rear mounting shaft (25), and the left end and the right end of the rear mounting shaft (25) are fixedly connected with the rear part of the left beam body (21) and the rear part of the right beam body (23) respectively.
4. A motor drive structure for an electric vehicle as set forth in claim 3, wherein: the front part of the left beam body (21) and the front part of the right beam body (23) are respectively provided with a front support (26), and the motor shaft (4) is connected with an inner hole of the front support (26) through a bearing (27); the rear hub assembly (3) is rotatably connected with the rear mounting shaft (25).
5. A motor drive structure for an electric vehicle as set forth in claim 3, wherein: the middle parts of the two motor fixing seats (6) are respectively provided with a mounting hole used for being connected with the motor shaft (4), and the mounting holes are communicated in the left-right direction.
6. The electric vehicle motor drive structure of claim 5, wherein: external threads (41) for being in threaded connection with the mounting holes are arranged on the left part and the right part of the motor shaft (4).
7. The electric vehicle motor drive structure of claim 5, wherein: a plurality of first fixing holes are formed in the two motor fixing seats (6) at intervals along the circumferential direction of the mounting holes, second fixing holes are formed in the positions, corresponding to the first fixing holes, of the frame (1) respectively, bolts (9) penetrate through the first fixing holes and are in threaded connection with the corresponding second fixing holes, and the frame (1) is connected with the motor fixing seats (6).
8. The electric vehicle motor drive structure of claim 2, wherein: the left connecting frame (22) is provided with a left support (28) protruding upwards, the right connecting frame (24) is provided with a right support (29) protruding upwards, and the left support (28) and the right support (29) form a shock absorber mounting seat.
9. The electric vehicle motor drive structure of claim 2, wherein: weight reducing holes (210) are formed in the left beam body (21) and the right beam body (23).
10. The electric vehicle motor drive structure of claim 1, wherein: the number of teeth of the first chain wheel (7) is smaller than the number of teeth of the second chain wheel (8).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322092136.7U CN220363433U (en) | 2023-08-04 | 2023-08-04 | Motor transmission structure of electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322092136.7U CN220363433U (en) | 2023-08-04 | 2023-08-04 | Motor transmission structure of electric vehicle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220363433U true CN220363433U (en) | 2024-01-19 |
Family
ID=89519861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322092136.7U Active CN220363433U (en) | 2023-08-04 | 2023-08-04 | Motor transmission structure of electric vehicle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220363433U (en) |
-
2023
- 2023-08-04 CN CN202322092136.7U patent/CN220363433U/en active Active
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| GR01 | Patent grant | ||
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