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 displacement assembly, the displacement assembly comprises a driving piece, a speed reduction piece, an inner lead screw and a sleeve, the speed reduction piece is coaxially arranged in the driving piece and meshed with an output shaft of the driving piece, the sleeve is arranged at the output end of the speed reduction piece, and the inner lead screw is arranged on the outer wall of the sleeve in a sleeving mode and is in threaded fit with the sleeve; and the speed reducing part can reduce the speed of the driving part and drive the sleeve to rotate, so that the inner screw rod can axially move on the outer wall of the sleeve. Through the threaded fit of the inner screw rod and the sleeve, the rotating sleeve drives the inner screw rod to move on the outer wall of the sleeve in the axial direction, and therefore the primary belt wheel driving wheel can be rapidly pushed to move, the reliability of the executing mechanism is improved, and meanwhile the transmission efficiency is improved.

Description

Technical Field

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

[0002] The EVCT actuator of a motorcycle is a kind of electronic continuously variable transmission technology. Its core lies in realizing continuous change of the transmission ratio through an electronic control system, so as to optimize the power output and fuel economy of the vehicle. An automatic transmission system that can continuously change the transmission ratio has the core feature that it does not require fixed gears, and realizes a smooth acceleration and deceleration process by adjusting the contact radius of the transmission belt or chain. This kind of transmission is widely used in vehicles such as automobiles and motorcycles, and has the advantages of simple structure, small volume, good fuel economy, and high driving comfort.

[0003] The existing motorcycle continuously variable transmission mechanism is mainly a centrifugal ball continuously variable transmission actuator. However, since the centrifugal ball continuously variable transmission mainly relies on frictional transmission between the belt and the pulley disc during operation, the transmission efficiency is low, the fuel consumption is high, the pulley disc is easily worn and needs to be replaced regularly, resulting in high maintenance costs and low reliability of the transmission. At the same time, the low transmission efficiency also makes the transmission mainly applied to small-displacement models and is not suitable for high-performance motorcycles with large torque output. Therefore, we propose a motorcycle ECVT actuator to solve the above problems. Summary of the Invention

[0004] The present invention aims to provide a motorcycle ECVT actuator to replace the centrifugal ball 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 displacement assembly. The displacement assembly includes a driving member, a reducing member, an inner lead screw, and a sleeve. The reducing member is coaxially arranged inside the driving member and meshes with the output shaft of the driving member. The sleeve is arranged at the output end of the reducing member. The inner lead screw is sleeved on the outer wall of the sleeve and is in threaded cooperation with the sleeve. The reducing member can reduce the speed of the driving member and drive the sleeve to rotate, so that the inner lead screw can axially move on the outer wall of the sleeve.

[0006] The beneficial effects of this solution are as follows: The reducing member can not only reduce the output speed of the driving member, but also reduce the impact and vibration caused by the high speed of the driving member, extend the service life of each component, enhance the reliability of the system. By arranging the reducing member inside the driving member and meshing it with the output shaft of the driving member, the installation height of the driving member and the reducing member is shortened, and the volume of the displacement assembly is reduced. Through the threaded cooperation between the inner lead screw and the sleeve, the rotating sleeve drives the inner lead screw to axially move on its outer wall, so as to quickly push the movable pulley of the primary belt pulley to move, thereby improving the reliability of the actuator and at the same time improving the transmission efficiency.

[0007] Traditional ECVT transmissions include an actuator, a pulley housing cover, a primary pulley fixed wheel, a primary pulley moving wheel, a secondary pulley fixed wheel, a secondary pulley moving wheel, an output shaft, and an input shaft. The actuator is used to move the primary pulley moving wheel axially along the output shaft for shifting gears. Moreover, the primary pulley fixed wheel is arranged on one side close to the pulley housing cover, that is, the primary pulley fixed wheel is close to the outside of the motorcycle, and the primary pulley moving wheel is close to the inside of the motorcycle. The actuator structures such as the motor and the intermediate shaft gear of the transmission are also installed inside the pulley housing cover of the motorcycle. Therefore, when assembling the motorcycle, it is necessary to complete the installation of structures such as the motor that make up the actuator one by one before installing structures such as the pulley housing cover, resulting in a low overall assembly efficiency of the motorcycle.

[0008] To solve the above problems, the applicant has developed a technology of installing the actuator outside the pulley housing cover. That is, the pulley housing cover can be preferentially installed without installing the actuator, and the overall assembly of the motorcycle can be preferentially completed. After the motorcycle is assembled, 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 is assembled, 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.

[0009] At the same time, the actuator being independent of the motorcycle can also improve the heat dissipation efficiency and can be provided with an independent sealing and lubrication system. During the maintenance process of the motorcycle, it is not necessary to disassemble the power assembly of the motorcycle to separately maintain the actuator and the lubrication system of the actuator, making the maintenance more convenient.

[0010] Preferably, as an improvement, it further includes a measurement component. The measurement component includes a distance sensor and a signal block. The signal block is arranged on the outer wall of the inner lead screw and moves axially along with the inner lead screw. The distance sensor is arranged on one side of the output shaft of the displacement component, and the distance sensor can detect the moving distance of the signal block.

[0011] The beneficial effect is that in this solution, only one sensor needs to be set to accurately measure the displacement. And compared with the current method that requires the cooperation of an angle sensor and a stroke sensor to achieve displacement measurement, the structure of this solution is simpler and the weight of the measurement mechanism is smaller.

[0012] Preferably, as an improvement, the distance sensor is a stroke sensor. A slope is provided at one end of the signal block close to the distance sensor. The distance between the end of the slope close to the end of the inner lead screw and the inner lead screw is greater than or less than the distance between the end far from the end of the inner lead screw and the inner lead screw.

[0013] The beneficial effects are as follows: Since the inclined plane is inclined, there is a difference in the distances between the two ends of the inclined plane close to and far from the end of the inner lead screw and the sensor. During gear shifting, the signal block moves axially synchronously. At this time, the inclined plane moves accordingly, and the relative position between the inclined plane and the sensor changes, causing the sensor to detect a change in the distance from the signal block. The stroke sensor can collect the magnetic field change signal of the stroke displacement, thereby more quickly and accurately determining the position of the inclined plane, and improving the measurement efficiency and accuracy.

[0014] Preferably, as an improvement, it further includes a housing. The measuring component is arranged inside the housing, and the driving part and the reduction part are arranged on the outer wall of the housing. A positioning groove is formed on the inner wall of the housing, and the positioning groove extends along the axial direction of the output end of the reduction part. One end of the signal block far from the inner lead screw is slidably installed in the positioning groove.

[0015] The beneficial effects are as follows: During the gear shifting process, since the signal block is eccentrically arranged on the outer wall of the inner lead screw, the inner lead screw can be guided through the cooperation between the positioning groove and the signal block, thereby preventing the inner lead screw from rotating. While simplifying the structure, it ensures that the inner lead screw can move axially, pushing the primary pulley along the axial direction to complete the gear shifting.

[0016] Preferably, as an improvement, the cross-section of the signal block along the radial direction of the inner lead screw is fan-shaped.

[0017] The beneficial effects are as follows: Setting the cross-section of the signal block as fan-shaped can increase the contact area between the signal block and the positioning groove, and increase the stability during the axial movement of the inner lead screw.

[0018] Preferably, as an improvement, a connecting piece is arranged at the output end of the reduction part, and the connecting piece is connected to the sleeve through a spline.

[0019] The beneficial effects are as follows: The connecting piece is used to connect the reduction part and the sleeve, enabling the driving part to drive the sleeve to rotate.

[0020] Preferably, as an improvement, a bearing is arranged between the sleeve and the housing.

[0021] The beneficial effects are as follows: The bearing supports the sleeve to prevent the sleeve from shaking during rotation.

[0022] Preferably, as an improvement, it further includes a mounting seat. The mounting seat is arranged on the outer wall of the housing, and the distance sensor is arranged on the mounting seat.

[0023] The beneficial effects are as follows: By installing the mounting seat on the housing, the sensor can be quickly installed at the preset position on the housing.

[0024] Preferably, as an improvement, a limiting ring is provided at one end of the sleeve close to the driving member. A number of limiting rods are evenly provided at one end of the limiting ring close to the inner lead screw, and the signal block can abut against the limiting rods; or a number of limiting grooves are evenly formed at one end of the limiting ring close to the inner lead screw, and an abutting rod is provided at one end of the signal block close to the limiting ring, and the abutting rod can abut against the inner wall of the limiting groove.

[0025] The beneficial effects are as follows: By providing a limiting ring on the outer wall of the sleeve to limit the moving distance of the inner lead screw on the outer wall of the sleeve and prevent the inner lead screw from rotating out of the connection range of the sleeve. During the rotation of the sleeve, the limiting rods move in a circular motion along with the limiting ring. When the inner lead screw moves towards the sleeve, the rotating limiting rods will abut against the side wall of the signal block. When the signal block abuts against the limiting rods, the driving member controls the sleeve to stop rotating, thereby preventing the signal block from hitting the limiting ring, further preventing the first bearing from deforming or being damaged under the impact of the inner lead screw, and improving the service life of the actuator. Or by providing an abutting rod and a limiting groove, when the abutting rod abuts against the end of the limiting groove, the driving member controls the sleeve to stop rotating, thereby preventing the signal block from hitting the limiting ring, further preventing the first bearing from deforming or being damaged under the impact of the inner lead screw, and improving the service life of the actuator.

[0026] Preferably, as an improvement, the signal block includes a permanent magnet block, and the distance sensor is a Hall sensor.

[0027] The beneficial effects are as follows: In this solution, under the Hall effect between the Hall sensor and the permanent magnet block on the signal block, the moving distance of the signal block can be accurately detected. Description of the Drawings

[0028] Figure 1 is a top view of Embodiment 1 of the present invention; Figure 2 is Figure 1 a cross-sectional view taken along line A-A in Detailed Description of the Invention

[0029] The following is a further detailed description through specific embodiments: The reference numerals in the accompanying drawings of the specification include: housing 1, driving member 2, connecting member 3, oil seal 4, sleeve 5, bearing 6, inner lead screw 7, distance sensor 8, signal block 9, mounting seat 10, inclined surface 11.

[0030] Embodiment 1 Embodiment 1 is basically as shown in the attached Figure 1-2 shown, as Figure 1The shown motorcycle ECVT actuator includes a housing 1 and a displacement component. The housing 1 is fixedly installed on the outer wall of the motorcycle by bolts. The displacement component includes a driving member 2, a reduction member, an inner lead screw 7 and a sleeve 5. The driving member 2 is fixedly installed at the upper end of the housing 1 by bolts. The reduction member is coaxially arranged inside the driving member 2 and meshes with the output shaft of the driving member 2. The specific structure is as in the prior art (Chinese Patent Publication No.: CN222423329U), and will not be elaborated here. As Figure 2 shown, a connecting member 3 is fixedly installed at the output end of the reduction member by bolts, and the lower end of the connecting member 3 rotates through the housing 1. An oil seal 4 is fixedly installed between the connecting member 3 and the outer wall. The sleeve 5 is rotatably installed inside the housing 1, and the upper end of the sleeve 5 is connected to the lower end of the connecting member 3 by splines. A bearing 6 is fixedly installed between the upper end of the sleeve 5 and the housing 1. Threads are provided on the outer wall of the sleeve 5, and the inner lead screw 7 is threadedly connected to the outer wall of the sleeve 5. The reduction member can reduce the speed of the driving member 2 and drive the sleeve 5 to rotate, so that the inner lead screw 7 can axially move on the outer wall of the sleeve 5.

[0031] It further includes a measuring component. The measuring component includes a distance sensor 8 and a signal block 9. The signal block 9 is located on the left side wall of the inner lead screw 7 and is integrally formed with the inner lead screw 7. A mounting seat 10 is fixedly installed at the left end of the housing 1 by bolts. The distance sensor 8 is fixedly installed on the mounting seat 10. The distance sensor 8 is a travel sensor. An inclined surface 11 is provided at one end of the signal block 9 opposite to the distance sensor 8. The inclined surface 11 is inclined with the upper end to the left and the lower end to the right, so that from top to bottom, the distance between the part of the inclined surface 11 opposite to the travel sensor and the travel sensor gradually increases. A positioning groove is provided on the inner wall of the housing 1, and the positioning groove extends along the axial direction of the inner lead screw 7. The cross-section of the signal block 9 along the radial direction of the inner lead screw 7 is fan-shaped, which increases the contact area between the signal block 9 and the positioning groove and increases the stability when the inner lead screw 7 axially moves. The signal block 9 is located in the positioning groove and is slidably matched with the positioning groove. The cooperation between the positioning groove and the signal block 9 can limit the inner lead screw 7, so that when the driving member 2 drives, the inner lead screw 7 can axially slide along the sleeve 5, thereby driving the primary pulley to axially move.

[0032] A limiting ring is integrally formed on the outer wall of the upper end of the sleeve 5. A number of limiting rods (not shown in the figure) are uniformly and fixedly installed at the lower end of the limiting ring by welding. In this embodiment, the number of limiting rods is set to 3. By increasing the number of limiting rods, the probability of the signal block 9 abutting against the limiting rods is increased, thereby further avoiding the collision between the inner lead screw 7 and the limiting ring. When the inner lead screw 7 moves towards the sleeve 5, the rotating limiting rod will abut against the side wall of the signal block 9. When the signal block 9 abuts against the limiting rod, the driving member 2 controls the sleeve 5 to stop rotating, thereby avoiding the signal block 9 hitting the limiting ring, and further preventing the bearing 6 from deforming or being damaged under the impact of the inner lead screw 7, and improving the service life of the actuator. Of course, 3 limiting grooves can also be opened at the lower end of the limiting ring, and the upper end of the signal block 9 is fixedly installed with an abutting rod by welding. The sleeve 5 stops rotating by abutting the abutting rod against the end of the limiting groove, thereby avoiding the inner lead screw 7 hitting the limiting ring.

[0033] The specific implementation process is as follows: When the actuator needs to shift gears, the driving member 2 is started and output through the speed reducer, so that the connecting member 3 connected to the output end of the speed reducer drives the sleeve 5 to rotate, and the inner lead screw 7 moves along the axial direction of the sleeve 5. At the same time, the inner lead screw 7 drives the primary pulley moving wheel to move synchronously. At this time, the signal block 9 also moves synchronously, and the position of the inclined surface 11 relative to the travel sensor changes, so that the distance detected by the travel sensor changes. At this time, according to the change amount and the slope of the inclined surface 11, the axial sliding distance of the inner lead screw 7 along the sleeve 5 can be quickly calculated. This distance is the axial movement distance of the primary pulley moving wheel along the sleeve 5, so as to determine the shift amount.

[0034] Embodiment 2 On the basis of Embodiment 1, the signal block 9 in this embodiment is strip-shaped and extends along the axial direction of the inner lead screw 7. The signal block 9 includes a permanent magnet block. Specifically, the permanent magnet block in this embodiment is a magnet, and the signal block 9 is formed by plastic coating outside the magnet. The signal block 9 is installed on the inner lead screw 7 by bolts. At the same time, the distance sensor 8 in this embodiment uses a Hall sensor, and the detection end of the Hall sensor is located at the rear side of the signal block 9 and faces the signal block 9. Compared with Embodiment 1, the Hall sensor in this embodiment uses the Hall effect to detect the moving distance of the signal block 9.

[0035] The above are only embodiments of the present invention, and common general technical solutions and / or characteristics in the solution are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present invention, several deformations and improvements can 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 practicability of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. Motorcycle ECVT actuator, characterized in that: It includes a displacement component, which comprises a driving member, a speed reducer, an inner lead screw and a sleeve. The speed reducer is coaxially arranged inside the driving member and meshes with the output shaft of the driving member. The sleeve is arranged at the output end of the speed reducer. The inner lead screw is sleeved on the outer wall of the sleeve and is in threaded cooperation with the sleeve. The speed reducer can reduce the speed of the driving member and drive the sleeve to rotate, so that the inner lead screw can axially move on the outer wall of the sleeve.

2. The motorcycle ECVT actuator according to claim 1, characterized in that: It further includes a measurement component, which comprises a distance sensor and a signal block. The signal block is arranged on the outer wall of the inner lead screw and axially moves along with the inner lead screw. The distance sensor is arranged on one side of the output shaft of the displacement component. The distance sensor can detect the moving distance of the signal block.

3. The motorcycle ECVT actuator according to claim 2, wherein: The distance sensor is a travel sensor. A slope is provided at one end of the signal block close to the distance sensor. The distance between one end of the slope close to the end of the inner lead screw and the inner lead screw is greater than or less than the distance between the other end of the slope far from the end of the inner lead screw and the inner lead screw.

4. The motorcycle ECVT actuator according to claim 3, wherein: It further includes a housing. The measurement component is arranged inside the housing. The driving member and the speed reducer are arranged on the outer wall of the housing. A positioning groove is provided on the inner wall of the housing, and the positioning groove extends axially along the output end of the speed reducer. One end of the signal block far from the inner lead screw is slidably installed in the positioning groove.

5. The motorcycle ECVT actuator according to claim 4, wherein: The cross-section of the signal block along the radial direction of the inner lead screw is fan-shaped.

6. The motorcycle ECVT actuator according to claim 5, characterized in that: A connecting member is provided at the output end of the speed reducer, and the connecting member is connected to the sleeve by a spline.

7. The motorcycle ECVT actuator according to claim 6, characterized in that: A bearing is provided between the sleeve and the housing.

8. The motorcycle ECVT actuator according to claim 7, characterized in that: It further includes a mounting seat, which is arranged on the outer wall of the housing, and the distance sensor is arranged on the mounting seat.

9. The motorcycle ECVT actuator according to claim 8, wherein: A limiting ring is provided at one end of the sleeve close to the driving member. A plurality of limiting rods are evenly arranged at one end of the limiting ring close to the inner lead screw, and the signal block can abut against the limiting rods; or a plurality of limiting grooves are evenly provided at one end of the limiting ring close to the inner lead screw, and an abutting rod is provided at one end of the signal block close to the limiting ring, and the abutting rod can abut against the inner wall of the limiting groove.

10. The motorcycle ECVT actuator according to claim 2, characterized in that: The signal block includes a permanent magnet block, and the distance sensor is a Hall sensor.

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