ECVT executing mechanism of motorcycle

Abstract

The invention relates to the technical field of motorcycles, and discloses a motorcycle ECVT executing mechanism which comprises a driving unit, an executing unit and a mounting unit, the driving unit comprises a driving motor, the executing unit comprises a fork shaft and a separation fork, the fork shaft is arranged on a motorcycle through the mounting unit and communicates with the driving motor, and the separation fork is fixedly arranged on the fork shaft; the free end is hinged to the release bearing to form a release lever, and the release lever converts rotation power of the driving motor into power for driving the release bearing to reciprocate. Rotation power of the driving motor is converted into power for driving the release bearing to reciprocate through the release lever structure, the transmission ratio is adjusted, and stepless speed change is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of motorcycles, and particularly to a motorcycle ECVT actuator. Background Art

[0002] In the field of motorcycle power transmission, continuously variable transmission systems (CVTs) have been widely used due to their characteristic of enabling the engine to always operate under the best working conditions. Currently, the continuously variable transmission system (CVT) of motorcycles mainly adopts the method of pulley beads continuously variable transmission as the actuator for continuously variable transmission. Based on the centrifugal force principle, during the operation of the motorcycle, the pulley beads generate centrifugal force under the influence of rotational speed, automatically adjust the transmission ratio, and achieve continuously variable transmission.

[0003] However, there are many problems to be solved urgently in the existing pulley bead continuously variable transmission actuator. From the perspective of transmission efficiency, it relies on frictional transmission between the belt and the pulley disc. This transmission method has large energy losses, resulting in relatively low transmission efficiency, and thus high fuel consumption. This not only increases the user's usage cost but also does not conform to the current development trend of energy conservation and environmental protection. In terms of component maintenance, key components such as pulley discs are extremely easy to wear during long-term frictional transmission. Frequent wear makes these components need to be replaced regularly, which not only reduces the reliability of the system but also significantly increases the user's maintenance cost, bringing a lot of inconvenience to the user. In addition, due to the limitations of its transmission efficiency, the pulley bead continuously variable transmission actuator is usually only applicable to small-displacement models and is difficult to meet the power requirements of high-performance motorcycles with large torque output, restricting the application of the motorcycle continuously variable transmission system to a wider range of models. Summary of the Invention

[0004] The present invention aims to provide a motorcycle ECVT actuator to replace the pulley bead structure, thereby improving the reliability of the actuator and at the same time improving the transmission efficiency.

[0005] To achieve the above object, the present invention adopts the following technical solution: A motorcycle ECVT actuator includes a driving unit and an executing unit. The executing unit includes a fork shaft, a separating fork, and a separating bearing. The fork shaft is rotatably arranged on the motorcycle and can rotate under the drive of the driving unit. The separating fork is fixedly arranged on the fork shaft, and the free end of the separating fork is hinged to the separating bearing, thereby converting the rotation of the driving unit into the swinging of the separating fork, and further driving the separating bearing to linearly reciprocate through the swinging of the separating fork.

[0006] The beneficial effects of this solution are as follows: In this solution, a separating lever structure is formed by a cross shaft and a release fork. The rotational power of the driving unit is converted into the power to drive the release bearing to reciprocate by using the separating lever structure. When the release fork pushes the release bearing, the thrust of the release bearing pushes the movable pulley of the primary pulley of the continuously variable transmission (CVT), so that the movable pulley moves toward the stationary pulley side, increasing the linear velocity of the primary pulley, and further increasing the transmission ratio. When the release fork pulls the release bearing, the pulling force of the release bearing pulls the movable pulley of the primary pulley of the continuously variable transmission (CVT), so that the movable pulley moves away from the stationary pulley side, decreasing the linear velocity of the primary pulley, and further decreasing the transmission ratio, realizing stepless speed change.

[0007] Furthermore, the driving unit further includes a gear transmission assembly. The gear transmission assembly is arranged between the cross shaft and the driving motor and can transmit the power of the driving motor to the cross shaft. By connecting the output shaft of the driving motor and the cross shaft through the gear transmission assembly, the power transmission from the driving motor to the cross shaft is more accurate and stable. At the same time, it has high transmission efficiency, is suitable for high-power transmission, has a compact structure, and has little influence on the load of the motorcycle.

[0008] Furthermore, the gear transmission assembly includes a worm and a turbine. The worm and the turbine are adapted to each other and can receive the rotational power transmitted by the driving motor. A spline is arranged at the rotation center of the turbine and is connected to the cross shaft through the spline, so as to transmit the rotational power to the cross shaft.

[0009] Beneficial effects: In this solution, the motor drives the worm to rotate, and the worm drives the turbine to rotate, thereby enabling the release bearing to reciprocate up and down, providing stepless speed change power for the movable pulley of the primary pulley and the belt. Compared with the prior art, the actuator of the present invention can significantly improve the transmission efficiency and reduce fuel consumption. At the same time, it can reduce vulnerable parts, improve the system reliability and reduce the maintenance cost. In addition, in this solution, the turbine and worm are used for transmission. Compared with the structure of the weight, the response is more timely and reliable, and the transmission efficiency is higher, so as to provide a reliable stepless speed change solution for high-performance motorcycles with large torque output. In addition, compared with the crossed helical gear transmission, the structure of the turbine and worm transmission is more compact. At the same time, the meshing tooth surfaces of the turbine and worm are in line contact, and the load-carrying capacity is better than that of the crossed helical gear transmission structure.

[0010] Furthermore, the gear transmission assembly further includes an internal gear ring, which is a bowl-shaped cylindrical structure composed of a side wall and a closed end. The side wall is provided with internal teeth, and the closed end is provided with a notch; one end of the worm is provided with a flat square shaft section adapted to the notch of the closed end. The flat square shaft section is inserted into the notch from the outside of the closed end of the internal gear ring to form a flat square connection; the output shaft of the driving motor is provided with a gear section, and the internal gear ring is rotatably arranged between the output shaft of the driving motor and the worm and meshes with the gear section of the output shaft of the driving motor. By arranging an internal gear ring between the output shaft of the driving motor and the worm, the power of the driving motor is decelerated by one stage through the internal gear ring and then transmitted to the worm to form a two-stage deceleration, and the worm to the turbine forms a three-stage deceleration, so that the high speed of the driving motor is reduced to the low speed required by the actuator, facilitating the control of the actuator.

[0011] Furthermore, the installation unit includes a first positioning block and a second positioning block. The first positioning block and the second positioning block are detachably fixed to the motorcycle, and the fork shaft is rotatably arranged on the first positioning block and the second positioning block. By arranging the first positioning block and the second positioning block to be detachably fixed to the motorcycle, when the fork shaft is damaged, it is convenient to disassemble the fork shaft, thereby reducing the difficulty of replacement and repair.

[0012] Furthermore, the installation unit further includes a housing. The gear transmission assembly is integrated in the housing, and the housing is detachably connected to the motorcycle and arranged on the side far from the motorcycle. Through the design of the housing, the gear transmission assembly is integrated into the housing and detachably connected to the side far from the motorcycle, so that the actuator can be made into an external structure. For consumers or maintenance personnel, during maintenance, the damaged actuator can be directly disassembled and replaced, or the damaged actuator can be directly disassembled for repair without completely disassembling the continuously variable transmission (CVT), reducing the difficulty of daily maintenance. For producers, when assembling products, the main structure of the motorcycle can be assembled first, and then the external actuator can be mounted on the motorcycle main body, improving the assembly efficiency.

[0013] Furthermore, the housing further includes a first motor housing and a second motor housing. The first motor housing is fixedly connected to the second motor housing by bolts, the second motor housing and the second positioning block are fixedly connected by bolts, both ends of the fork shaft are respectively provided with fork shaft bushings and rotatably arranged on the first positioning block and the second positioning block through the fork shaft bushings, and the first positioning block and the second positioning block are fixedly connected to the motorcycle by bolts. Splitting the housing into the first motor housing and the second motor housing reduces the difficulty of integrating the gear transmission assembly into the housing and the difficulty of subsequent maintenance.

[0014] Furthermore, it further includes a measurement unit, which is used to detect the angular data of the turbine rotation and can control the start of the drive motor according to the detected angular data. The rotation angle of the separation lever is adjusted in real time by the motor, replacing the mechanical transmission with "electronic logic" to achieve infinitely smooth power output and maximized energy efficiency, eliminating the shift jerks of the traditional continuously variable transmission (CVT). At the same time, through the seamless coupling of electric power and mechanical power, the engine operating conditions are always optimized in the efficient range.

[0015] Furthermore, the measurement unit includes an angle sensor, which is fixed on the housing and connected to a TCU. The TCU is electrically connected to the drive motor and can control the start of the drive motor. Through the organic integration of the angle sensor and the drive motor by the TCU, replacing the mechanical transmission with "electronic logic" to achieve infinitely smooth power output and maximized energy efficiency, the engine operating conditions are always optimized in the efficient range. Description of the Drawings

[0016] Figure 1 It is the front view of the embodiment of the present invention; Figure 2 It is Figure 1 the cross-sectional view taken along line A-A in Figure 3 It is Figure 1 the cross-sectional view taken along line B-B in Figure 4 It is Figure 1 the cross-sectional view taken along line C-C in

[0017] The reference numerals in the drawings of the specification include: release bearing 11, primary pulley driving wheel 121, primary pulley fixed wheel 122, output shaft 123, pulley housing cover 13, positioning block one 21, positioning block two 22, motor housing one 231, motor housing two 232, fork shaft 31, release fork 32, drive motor 41, motor output shaft 411, worm 421, turbine 422, internal gear ring 423, angle sensor 5, sleeve 6, spacer 7. Detailed Embodiment

[0018] Embodiment 1 Embodiment 1 is basically as shown in the Figures 1-4 drawing, such as the Figures 1-4 motorcycle ECVT actuator shown, which is used to be embedded in the existing motorcycle continuously variable transmission (CVT) to realize the motorcycle continuously variable transmission function, including an installation unit, a drive unit, an execution unit and a measurement unit. As shown in the Figure 4 drawing, the motorcycle continuously variable transmission (CVT) includes a pulley housing cover 13 and an output assembly. The pulley housing cover 13 is fixedly connected to the motorcycle by bolts and wraps and installs the output assembly inside the pulley housing cover 13.

[0019] As shown in theFigure 4 As shown in the figure, the output component includes a primary belt pulley fixed wheel 122, a primary belt pulley moving wheel 121, and an output shaft 123. The primary belt pulley fixed wheel 122 and the primary belt pulley moving wheel 121 are both arranged on the output shaft 123, and the primary belt pulley moving wheel 121 can move axially along the output shaft 123. Specifically, a sleeve 6 is provided between the primary belt pulley moving wheel 121 and the output shaft 123. The sleeve 6 is sleeved on the output shaft 123 and has a small clearance transition fit with the primary belt pulley moving wheel 121, enabling the primary belt pulley moving wheel 121 to slide axially along the output shaft 123, thereby reducing the wear of the output shaft 123 and lowering the cost of subsequent maintenance. A release bearing 11 is sleeved on the output shaft 123, and the release bearing 11 is slidably arranged on the sleeve 6 and can push the primary belt pulley moving wheel 121 to move axially along the output shaft 123.

[0020] The installation unit includes a positioning block one 21 and a positioning block two 22. The positioning block one 21 and the positioning block two 22 can be detachably fixed to the inner side of the pulley housing cover 13. Specifically, the positioning block one 21 and the positioning block two 22 are respectively fixedly connected to the inner side of the pulley housing cover 13 by bolts.

[0021] The drive unit includes a drive motor 41 and a gear transmission assembly. The drive motor 41 includes a motor body and a motor output shaft 411. The motor body is fixedly connected to the inner side of the pulley housing cover 13 by bolts. The gear transmission assembly is integrated in the housing. As Figure 3 shown in the figure, the gear transmission assembly includes an internal gear, a turbine 422, and a worm 421. The internal gear, the turbine 422, and the worm 421 are all rotatably arranged on the inner side of the pulley housing cover 13. Specifically, the internal gear ring 423 is a bowl-shaped cylindrical structure composed of a side wall and a closed end. The side wall is provided with internal teeth, and the closed end is provided with a notch; one end of the worm 421 is provided with a flat square shaft section adapted to the notch of the closed end. The flat square shaft section is inserted into the notch from the outside of the closed end of the internal gear ring 423 and forms a flat square connection; the motor output shaft 411 is provided with a gear section and meshes with the internal teeth on the side wall of the internal gear ring 423, thereby transmitting the rotational power of the drive motor 41 to the turbine 422 through the worm 421.

[0022] The execution unit includes a fork shaft 31 and a release fork 32. As Figure 1 、 Figure 2 shown in the figure, the fork shaft 31 is rotatably provided with a bushing and is rotatably arranged between the positioning block one 21 and the positioning block two 22 through the bushing. The left end of the fork shaft 31 is provided with a spline and is connected to the turbine 422 through the spline. The release fork 32 is welded to the fork shaft 31 and is hinged to the release bearing 11 through the free end to form a release lever, thereby converting the rotational force of the drive motor 41 into the power source for the reciprocating movement of the release bearing 11 by using the release lever.

[0023] As Figure 1 、 Figure 2As shown in the figure, the measuring unit includes an angle sensor 5, which is fixed on the housing and connected to a TCU. The TCU is electrically connected to the drive motor 41 and can control the start of the drive motor 41.

[0024] During use, the output shaft 411 of the drive motor 41 is in internal meshing with the internal gear ring 423 to achieve primary transmission. The internal gear ring 423 is in secondary transmission with the worm 421, and the worm 421 is in tertiary transmission with the turbine 422. The rotation speed of the drive motor 41 is reduced through the tertiary transmission. Then, the turbine 422 converts the rotational motion into the up-and-down reciprocating motion of the release bearing 11 through the spline-connected fork shaft 31, causing the driving pulley of the primary pulley 121 to approach or move away from the fixed pulley of the primary pulley 122, changing the transmission ratio of the output assembly. Specifically, when the release bearing 11 moves toward the driving pulley side under the push of the release fork 32, the driving pulley of the primary pulley 121 approaches the fixed pulley of the primary pulley 122, and the transmission ratio of the output assembly increases; conversely, when the release bearing 11 moves away from the driving pulley side under the push of the release fork 32, the driving pulley of the primary pulley 121 moves away from the fixed pulley of the primary pulley 122, and the transmission ratio of the output assembly decreases. At the same time, the angle sensor 5 drives the turbine 422 to rotate through the worm 421 to collect the signal of the angle change and sends it to the TCU for processing, so that the TCU can understand the state of the release bearing 11 and thus know the state of the continuously variable transmission (CVT).

[0025] Embodiment 2 Embodiment 2 is basically the same as Embodiment 1, except that in the output assembly of the motorcycle continuously variable transmission (CVT), the positions of the driving pulley of the primary pulley and the fixed pulley of the primary pulley are reversed, that is, the driving pulley of the primary pulley is arranged on the side close to the pulley housing cover. The mounting assembly further includes a motor housing one 231 and a motor housing two 232. The motor housing one 231 and the motor housing two 232 are connected by bolts to form a housing. The drive motor 41 is fixed on the motor housing one 231 by bolts. The transmission assembly is installed inside the housing. The motor housing two 232 is connected to the positioning block two 22 by bolts to form an external-mounted actuator. The positioning block one 21 and the positioning block two 22 are respectively fixed on the outside of the pulley housing cover 13 by bolts, so as to fix the external-mounted actuator outside the motorcycle continuously variable transmission (CVT) through the positioning block one 21 and the positioning block two 22, and drive the motorcycle continuously variable transmission (CVT) through the external-mounted actuator. During assembly, the overall vehicle assembly of the motorcycle can be completed first. When the motorcycle assembly is completed, the externally-mounted actuator can be buckled on the pulley housing cover to quickly complete the installation of the transmission actuator, effectively improving the assembly efficiency of the motorcycle. Moreover, the assembly of the motorcycle and the assembly of the actuator can be carried out simultaneously. After the motorcycle assembly is completed, the assembled actuator can be directly connected to the motorcycle, making the installation of the actuator more convenient and improving the assembly efficiency of the motorcycle at the same time.

[0026] Meanwhile, during subsequent maintenance, the actuator can also be independently maintained without disassembling the continuously variable transmission (CVT) of the motorcycle, reducing the workload and difficulty of maintenance.

[0027] Embodiment 3 Embodiment 3 is basically the same as Embodiment 2, except that a spacer block 7 is further provided between the release bearing 11 and the driven pulley 121 of the primary pulley. The spacer block 7 is sleeved outside the sleeve 6 and has a small clearance transition fit with the sleeve 6, enabling the spacer block 7 to slide axially along the output shaft 123. By providing the spacer block 7, the modification to the components of the existing continuously variable transmission (CVT) can be reduced, and the cost of upgrading is lowered. This makes it possible to push the driven pulley 121 of the primary pulley to slide through the release bearing 11 without making major modifications to the existing continuously variable transmission (CVT) of the motorcycle.

[0028] The above are only embodiments of the present invention. Specific technical solutions and / or common knowledge such as characteristics well known in the art are not described in detail herein. It should be noted that the technical means for solving problems in the above embodiments of the present invention can be combined to solve multiple technical problems simultaneously. For those skilled in the art, without departing from the technical solution of the present invention, several modifications and improvements can still be made, which should also be regarded as the protection scope of the present invention, and these will not affect the implementation effect of the present invention and the practicality of the patent. The protection scope required by this application should be based on the content of its claims, and the specific implementation manners described in the specification can be used to interpret the content of the claims.

Claims

1. Motorcycle ECVT actuator, characterized in that: It includes a driving unit and an execution unit. The execution unit includes a fork shaft, a release fork, and a release bearing. The fork shaft is rotatably arranged on the motorcycle and can be rotated under the drive of the driving unit. The release fork is fixedly arranged on the fork shaft, and the free end of the release fork is hinged to the release bearing, so as to convert the rotation of the driving unit into the swing of the release fork, and further drive the release bearing to linearly reciprocate through the swing of the release fork.

2. The motorcycle ECVT actuator according to claim 1, characterized in that: The driving unit includes a driving motor and a gear transmission assembly. The driving motor is fixed on the motorcycle. The gear transmission assembly is arranged between the fork shaft and the driving motor and can transmit the power of the driving motor to the fork shaft.

3. The motorcycle ECVT actuator according to claim 2, wherein: The gear transmission assembly includes a worm and a turbine. The worm is adapted to the turbine and can receive the rotational power transmitted by the driving motor. A spline is arranged at the rotation center of the turbine and is connected to the fork shaft through the spline, so as to transmit the rotational power to the fork shaft.

4. The motorcycle ECVT actuator according to claim 3, wherein: The gear transmission assembly further includes an internal gear ring. The internal gear ring is a bowl-shaped cylindrical structure composed of a side wall and a closed end. Internal teeth are arranged on the side wall, and a notch is arranged on the closed end. One end of the worm is provided with a flat square shaft section adapted to the notch of the closed end. The flat square shaft section is inserted into the notch from the outside of the closed end of the internal gear ring and forms a flat square connection. A gear section is arranged on the output shaft of the driving motor. The internal gear ring is rotatably arranged between the output shaft of the driving motor and the worm and meshes with the gear section of the output shaft of the driving motor.

5. The motorcycle ECVT actuator according to claim 4, characterized in that: It further includes a mounting unit. The mounting unit includes a positioning block one and a positioning block two. The positioning block one and the positioning block two are detachably fixed on the motorcycle. The fork shaft is rotatably arranged on the positioning block one and the positioning block two.

6. The motorcycle ECVT actuator according to claim 5, wherein: The mounting unit further includes a housing. The gear transmission assembly is integrated in the housing. The housing is detachably connected to the motorcycle and is arranged on the side far from the motorcycle.

7. The motorcycle ECVT actuator according to claim 6, characterized in that: The housing further includes a motor housing one and a motor housing two. The motor housing one is fixedly connected to the motor housing two through bolts. The motor housing two and the positioning block two are fixedly connected through bolts. Fork shaft bushings are respectively arranged at both ends of the fork shaft and the fork shaft is rotatably arranged on the positioning block one and the positioning block two through the fork shaft bushings. The positioning block one and the positioning block two are fixedly connected to the motorcycle through bolts.

8. The motorcycle ECVT actuator according to claim 7, wherein: It further includes a measuring unit. The measuring unit is used to detect the angular data of the turbine rotation and can control the start of the driving motor according to the detected angular data.

9. The motorcycle ECVT actuator according to claim 8, wherein: The measuring unit includes an angle sensor. The angle sensor is fixed on the housing and is connected to a TCU. The TCU is electrically connected to the driving motor and can control the start of the driving motor.

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