CN218022044U

CN218022044U - Stepless speed change device for electric motorcycle

Info

Publication number: CN218022044U
Application number: CN202222460208.4U
Authority: CN
Inventors: 屠申富; 屠昌德
Original assignee: Yuhuan Dongfang Automobile Brake Factory
Current assignee: Yuhuan Dongfang Automobile Brake Factory
Priority date: 2022-09-15
Filing date: 2022-09-15
Publication date: 2022-12-13
Anticipated expiration: 2032-09-15

Abstract

The utility model provides a continuously variable transmission that electric motorcycle used belongs to variable speed technical field. It has solved the short problem of life. The power transmission device comprises an input shaft, a transmission shaft and an output shaft which are all parallel, wherein power is transmitted between the input shaft and the transmission shaft through a belt, an output gear is fixed on the transmission shaft, a one-way clutch is connected on the output shaft, an inner ring of the one-way clutch is fixedly connected with the output shaft, an outer ring of the one-way clutch is fixed with the output shaft along the axial direction, and meshing teeth meshed with the output gear are arranged on the outer peripheral side of the outer ring of the one-way clutch. It has the advantages of long service life, long sliding distance and the like.

Description

Stepless speed change device for electric motorcycle

Technical Field

The utility model belongs to the technical field of the variable speed, a infinitely variable speed device that electric motorcycle used is related to.

Background

The traditional motorcycles are gasoline motorcycles, which realize power driving by burning gasoline in an engine, but with the influence of various factors such as gradual improvement of national requirements on carbon emission, higher noise of gasoline motorcycles and the like, more and more electric motorcycles begin to appear in the market. An electric motorcycle is a motorcycle which takes a battery as an energy source and converts electric energy into mechanical energy by a motor. Like gasoline motorcycles, some electric motorcycles also use a continuously variable transmission device, which includes an input shaft for receiving power of a motor, a transmission shaft parallel to the input shaft, and an output shaft parallel to the transmission shaft and used for outputting power to wheels, wherein the input shaft is provided with a driving wheel, the transmission shaft is provided with a driven wheel, the driving wheel is matched with the driven wheel through a belt, the transmission ratio between the driving wheel and the driven wheel can be changed (the structure of the continuously variable transmission device is the same as that of the gasoline motorcycle), and the transmission shaft and the output shaft transmit power through a reduction gear.

However, in the actual operation of the electric motorcycle, when the motor stops, the electric motorcycle is in a sliding state, the output shaft is still rotating at the moment, the output shaft can transmit sliding power to the input shaft through the transmission shaft and the belt, so that the abrasion of the belt can be aggravated, the motor can be damaged, and the service life is shortened.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem that prior art exists, provide a infinitely variable transmission for electric motorcycle, solved the short problem of life.

The purpose of the utility model can be realized by the following technical proposal:

the stepless speed change device for the electric motorcycle comprises an input shaft, a transmission shaft and an output shaft which are all parallel, wherein power is transmitted between the input shaft and the transmission shaft through a belt, and an output gear is fixed on the transmission shaft.

When the electric motorcycle runs, the power of the motor is transmitted to the input shaft and is transmitted to the transmission shaft through the belt, the transmission shaft transmits the power to the outer ring of the one-way clutch through the output gear, and the outer ring drives the inner ring to rotate so that the power is transmitted to the output shaft and is finally received by the wheels. When a user controls the motor to stop, the electric motorcycle is in a free sliding state, the output shaft still rotates at the moment, the inner ring also rotates along with the output shaft and slips with the outer ring, and the output gear, the transmission shaft, the belt and the input shaft can be kept still all the time, so that the output shaft cannot reversely drive the rotating shaft of the motor to rotate under the state, the abrasion of the belt is avoided, the damage to the motor is reduced, and the service life is prolonged. Furthermore, this also reduces the kinetic energy loss of the sliding and lengthens the sliding distance.

In the continuously variable transmission for the electric motorcycle, one side of the outer ring is provided with an annular mounting groove, the inner ring is positioned in the annular mounting groove, the one-way clutch further comprises a plurality of rollers arranged between the outer ring and the inner ring, the output shaft is fixedly connected with a transmission member, the transmission member is circumferentially fixed with the inner ring, and the transmission member seals a notch of the annular mounting groove.

The one-way clutch is a roller type one-way clutch, the outer ring can drive the inner ring to rotate through the rollers when rotating, and when the outer ring loses power but the inner ring still rotates, the outer ring and the inner ring can slip. The inner ring is positioned in the annular mounting groove and can still form circumferential fixation with the output shaft through a transmission part; and the notch of annular mounting groove is sealed again to the driving medium, makes the roller can not fall out from annular mounting groove like this, has also guaranteed the reliability of structure when increase of service life.

In the continuously variable transmission for an electric motorcycle, the transmission member is engaged with the output shaft through a spline, the output shaft is provided with a convex ring, the other side of the outer ring abuts against the convex ring, the output shaft is provided with a limiting member, and the limiting member abuts against the transmission member along the axial direction of the output shaft.

The limiting part is abutted against the transmission part along the axial direction of the output shaft, the transmission part is connected with the inner ring, the inner ring is positioned in the outer ring, the outer ring is abutted against the convex ring of the output shaft, and the limiting part is matched with the convex ring to ensure that the outer ring, the inner ring and the transmission part are fixed together with the output shaft along the axial direction.

In the above-mentioned stepless speed change device for an electric motorcycle, the transmission member is disc-shaped, the inner ring is provided with a plurality of sockets, and the transmission member is provided with a plurality of insertion blocks inserted into the sockets.

In the continuously variable transmission for an electric motorcycle, as another technical scheme, the transmission member includes a sleeve-shaped body and a sheet body fixedly connected outside the sleeve-shaped body along an axial direction, the sleeve-shaped body is fixedly connected with the inner ring, and the sheet body closes a notch of the annular mounting groove.

When specifically producing, can be directly as an organic whole with the processing of cover form body and inner ring, can directly seal the notch of annular mounting groove after the axial fixity is connected outside the cover form body with the lamellar body.

In the continuously variable transmission for the electric motorcycle, the sheet body is sleeved outside the sleeve-shaped body, the sleeve-shaped body is further clamped with the positioning clamp spring, and the sheet body is positioned between the positioning clamp spring and the inner ring.

Compared with the prior art, the stepless speed change device for the electric motorcycle is characterized in that the output shaft is connected with the one-way clutch, and the outer ring of the one-way clutch is provided with the meshing teeth meshed with the output gear, so that when the electric motorcycle is in a free sliding state, the inner ring of the one-way clutch rotates along with the output shaft but slips between the inner ring and the outer ring, the output gear, the transmission shaft, the belt and the input shaft can be always kept still, the output shaft cannot reversely drive the rotating shaft of the motor to rotate in the state, the abrasion of the belt is avoided, the damage to the motor is reduced, and the service life is prolonged. Furthermore, this also reduces the kinetic energy loss of the sliding and lengthens the sliding distance.

Drawings

Fig. 1 is a sectional view of a first embodiment of a continuously variable transmission for an electric motorcycle.

FIG. 2 is a schematic view of the input shaft in the first embodiment.

FIG. 3 is a partially exploded view of the input shaft according to one embodiment.

FIG. 4 is a partially exploded view of an alternate angle at the input shaft according to one embodiment.

FIG. 5 is an exploded view of the one-way clutch according to one embodiment.

In the figure, 1, an input shaft; 2. a drive shaft; 3. a motor; 4. a belt; 5. a driving wheel; 5a, a main fixed wheel disc; 5b, driving a wheel disc; 6. a platen; 7. a ball bearing; 8. a driven wheel; 8a, an auxiliary fixed wheel disc; 8b, an auxiliary movable wheel disc; 9. pressing the spring; 10. a box body; 11. an output shaft; 11a, a convex ring; 12. an output gear; 13. a one-way clutch; 13a, an outer ring; 13a1, meshing teeth; 13a2, an annular mounting groove; 13b, an inner ring; 13b1, a positioning groove; 13b2, a socket; 13c, a roller; 13d, a support spring; 14. a transmission member; 14a, an insert block; 15. a bearing; 16. and a limiting member.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

Example one

As shown in fig. 1 to 5, the continuously variable transmission for the electric motorcycle includes a bracket (not shown), an input shaft 1 and a transmission shaft 2 both rotatably connected to the bracket and parallel to each other, and a motor 3 connected to one end of the input shaft 1, wherein power is transmitted between the input shaft 1 and the transmission shaft 2 through a belt 4. Specifically, the input shaft 1 is provided with a driving wheel 5, the transmission shaft 2 is provided with a driven wheel 8, and the belt 4 is sleeved on the driving wheel 5 and the driven wheel 8. Wherein, action wheel 5 is including fixing the main fixed wheel dish 5a at the 1 other end of input shaft and can follow the action wheel dish 5b of the 1 activity of input shaft, action wheel dish 5b is compared in main fixed wheel dish 5a and will be closer to motor 3, still be fixed with pressure disk 6 on the input shaft 1, pressure disk 6 is located the one side of main fixed wheel dish 5b dorsad main fixed wheel dish 5a, be equipped with a plurality of balls 7 that set up around input shaft 1 between action wheel dish 5b and the pressure disk 6, be equipped with a plurality of movable grooves on the action wheel dish 5b and each ball 7 is located the movable inslot that corresponds, ball 7 can be followed movable groove and moved towards action wheel dish 5b edge and promote the main fixed wheel dish 5b and be close to towards main fixed wheel dish 5a when input shaft 1 rotates. The driven wheel 8 comprises an auxiliary fixed wheel disc 8a fixed on the transmission shaft 2 and an auxiliary movable wheel disc 8b capable of moving along the transmission shaft 2, the main fixed wheel disc 5a and the auxiliary movable wheel disc 8b are located on the same side, the driving wheel disc 5b and the auxiliary fixed wheel disc 8a are located on the same side, and a jacking spring 9 capable of enabling the auxiliary movable wheel disc 8b to be close to the auxiliary fixed wheel disc 8a is further arranged on the transmission shaft 2. One side of the bracket is fixed with a box body 10, an output shaft 11 is rotationally connected in the box body 10, one end of the output shaft 11 extends out of the box body 10, one end of a transmission shaft 2 extends into the box body 10, an auxiliary fixed wheel disc 8a is closer to the box body 10 than an auxiliary movable wheel disc 8b, the transmission shaft 2 is parallel to the output shaft 11, one end of the transmission shaft 2 extending into the box body 10 is fixedly connected with an output gear 12, the output shaft 11 positioned in the box body 10 is connected with a one-way clutch 13, the one-way clutch 13 comprises an inner ring 13b, an outer ring 13a and a plurality of rollers 13c arranged between the inner ring 13b and the outer ring 13a, the outer ring 13a and the output shaft 11 are fixed along the axial direction, the inner ring 13b of the one-way clutch 13 is fixedly connected with the output shaft 11, the outer ring 13a of the one-way clutch 13 is provided with meshing teeth 13a1 meshed with the output gear 12, and the outer diameter of the output gear 12 is smaller than the outer diameter of the outer ring 13 a.

Further, as shown in fig. 3, 4 and 5, an annular mounting groove 13a2 is provided at one side of the outer ring 13a, the inner ring 13b is located in the annular mounting groove 13a2, a plurality of positioning grooves 13b1 are provided at the outer peripheral side of the inner ring 13b, each roller 13c is located in the corresponding positioning groove 13b1, the positioning groove 13b1 is arc-shaped, the distance from the bottom wall of the positioning groove 13b1 to the center line of the inner ring 13b gradually increases along the rotation direction of the outer ring 13a, a support spring 13d is further provided in each positioning groove 13b1, one end of the support spring 13d is fixed to the groove wall of the positioning groove 13b1, the other end of the support spring 13d abuts against the roller 13c, and the roller 13c moves from the position where the distance from the bottom wall of the positioning groove 13b1 to the center line of the inner ring 13b is smaller to the position where the bottom wall of the positioning groove 13b1 is farther from the bottom wall of the center line of the inner ring 13b1 to the center line of the inner ring 13b and abuts against the inner peripheral wall of the outer ring 13 a. The output shaft 11 in the box 10 is fixedly connected with a transmission member 14, the transmission member 14 is circumferentially fixed with the inner ring 13b, and the transmission member 14 seals the notch of the annular mounting groove 13a 2.

As shown in fig. 1, 2, 3 and 4, the transmission member 14 is disc-shaped, the inner ring 13b is provided with a plurality of insertion holes 13b2, and the transmission member 14 is provided with a plurality of insertion blocks 14a inserted into the insertion holes 13b 2. Specifically, the transmission member 14 is in spline fit with the output shaft 11, a protruding ring 11a is provided outside the output shaft 11, the other side of the outer ring 13a abuts against the protruding ring 11a, a limiting member 16 is provided on the output shaft 11, and the limiting member 16 abuts against the transmission member 14 along the axial direction of the output shaft 11. A bearing 15 is arranged between the other end of the output shaft 11 and the box body 10, the limiting piece 16 is in a sleeve shape, the other end of the limiting piece 16 abuts against the bearing 15, and the outer ring 13a, the inner ring 13b and the transmission piece 14 are axially fixed together with the output shaft 11 through the arrangement.

When the electric motorcycle runs, the power of the motor 3 is transmitted to the input shaft 1 and is transmitted to the transmission shaft 2 through the belt 4, the transmission shaft 2 transmits the power to the outer ring 13a through the output gear 12, the outer ring 13a drives the inner ring 13b to rotate through the roller 13c, so that the power is transmitted to the output shaft 11 through the transmission piece 14, and finally the power is received by the wheels. When a user controls the motor 3 to stop, the electric motorcycle is in a free sliding state, the output shaft 11 still rotates at the moment, the inner ring 13b also rotates along with the output shaft 11 but slips with the outer ring 13a, and the output gear 12, the transmission shaft 2, the belt 4 and the input shaft 1 can be kept still all the time, so that the output shaft 11 cannot reversely drive the rotating shaft of the motor 3 to rotate under the state, the abrasion of the belt 4 is avoided, the damage to the motor 3 is reduced, and the service life is prolonged. Furthermore, the kinetic energy loss of the sliding is reduced, and the sliding distance is prolonged.

Example two

The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: in this embodiment, the limiting member 16 is a limiting snap spring fixed outside the output shaft 11 in a snap-fit manner.

EXAMPLE III

The structure and principle of this embodiment are basically the same as those of the first embodiment, except that: in this embodiment, the transmission member 14 includes a sleeve-shaped body and a sheet body fixedly connected outside the sleeve-shaped body along the axial direction, the sleeve-shaped body is fixedly connected with the inner ring 13b, and the sheet body closes the notch of the annular mounting groove 13a 2. Specifically, the sheet body is sleeved outside the sleeve-shaped body, a positioning clamp spring is further clamped on the sleeve-shaped body, and the sheet body is located between the positioning clamp spring and the inner ring 13 b.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The stepless speed change device for the electric motorcycle comprises an input shaft (1), a transmission shaft (2) and an output shaft (11) which are all parallel, wherein power is transmitted between the input shaft (1) and the transmission shaft (2) through a belt (4), and an output gear (12) is fixed on the transmission shaft (2), and is characterized in that a one-way clutch (13) is connected onto the output shaft (11), an inner ring (13 b) of the one-way clutch (13) is fixedly connected with the output shaft (11), an outer ring (13 a) of the one-way clutch (13) is fixed with the output shaft (11) along the axial direction, and meshing teeth (13 a 1) meshed with the output gear (12) are arranged on the outer circumferential side of the outer ring (13 a) of the one-way clutch (13).

2. The continuously variable transmission device for the electric motorcycle according to claim 1, wherein an annular mounting groove (13 a 2) is formed in one side of the outer ring (13 a), the inner ring (13 b) is located in the annular mounting groove (13 a 2), the one-way clutch (13) further includes a plurality of rollers (13 c) disposed between the outer ring (13 a) and the inner ring (13 b), a transmission member (14) is fixedly connected to the output shaft (11), the transmission member (14) and the inner ring (13 b) are circumferentially fixed, and the transmission member (14) closes a notch of the annular mounting groove (13 a 2).

3. Continuously variable transmission unit for an electric motorcycle according to claim 2, wherein the transmission member (14) is spline-fitted to the output shaft (11), the output shaft (11) has a collar (11 a) outside thereof and the other side of the outer ring (13 a) abuts against the collar (11 a), the output shaft (11) is provided with a limiting member (16), and the limiting member (16) abuts against the transmission member (14) in the axial direction of the output shaft (11).

4. Continuously variable transmission for electric motorcycles according to claim 2 or 3, wherein the transmission member (14) has a disk shape, the inner ring (13 b) is provided with a plurality of insertion holes (13 b 2) and the transmission member (14) is provided with a plurality of insertion blocks (14 a) inserted into the insertion holes (13 b 2).

5. Continuously variable transmission unit for electric motorcycles according to claim 2 or 3, wherein said transmission member (14) comprises a sleeve-shaped body and a plate body fixedly connected to the outside of the sleeve-shaped body in the axial direction, the sleeve-shaped body being fixedly connected to the inner ring (13 b), the plate body closing the notch of the annular mounting groove (13 a 2).

6. The continuously variable transmission for electric motorcycles as claimed in claim 5, wherein said plate body is sleeved outside said sleeve-shaped body, a positioning snap spring is further engaged with said sleeve-shaped body, and said plate body is located between said positioning snap spring and said inner ring (13 b).