Continuously variable transmission and motorcycle

Abstract

The utility model relates to the field of motorcycle transmissions, and discloses a continuously variable transmission which comprises an executing mechanism and a speed change mechanism, the speed change mechanism comprises an input assembly, an output assembly and a connecting piece, the connecting piece is arranged between the input assembly and the output assembly in a tensioning mode, and the executing mechanism comprises a displacement assembly and a measuring assembly. The measuring assembly can measure the moving distance of the displacement assembly, the displacement assembly comprises a driving part, a speed reduction part, an inner screw rod and a sleeve, the speed reduction part is coaxially arranged in the driving part and meshed with the output end of the driving part, the sleeve is arranged at the output end of the speed reduction part, and the inner screw rod is arranged on the outer wall of the sleeve in a sleeving mode and matched with the sleeve in a threaded mode. The end, away from the driving part, of the inner lead screw is rotationally connected with the primary belt pulley driving wheel, the speed reducing part can decelerate the driving part and drive the sleeve to rotate, the inner lead screw can axially move on the outer wall of the sleeve, and therefore the primary belt pulley driving wheel is close to or away from the primary belt pulley fixed wheel; and the diameter of the input assembly tensioning connecting piece is further changed.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle transmissions, specifically to continuously variable transmissions (CVTs) and motorcycles. Background Technology

[0002] A continuously variable transmission (CVT) is an automatic transmission system that can continuously change the gear ratio. Its core feature is that it does not require fixed gears; instead, it achieves smooth acceleration and deceleration by adjusting the contact radius of the drive belt or chain. This type of transmission is widely used in automobiles, motorcycles, and other vehicles, offering advantages such as simple structure, small size, good fuel economy, and high driving comfort.

[0003] A multi-scheme, modular, constant-power stepless speed regulating mechanism, disclosed in patent number CN204153070U, achieves stepless speed regulation by reducing or increasing the distance between the moving and fixed wheels of a split-type connecting wheel. During machine operation, the connecting wheel rotates, and a bearing is housed within a bearing support. The outer ring of the bearing is fixed to the bearing support, while the inner ring of the bearing is fixed to the connecting wheel. When the connecting wheel rotates, only the inner ring of the bearing rotates, while the outer ring and bearing support remain stationary. This allows for stepless speed regulation using the bearing support. In use, the speed regulating component directly or indirectly controls the up-and-down movement of the bearing support, causing the moving wheel of the split-type connecting wheel pair to move up and down, changing the distance between the moving and fixed wheels of the connecting wheel pair, thereby changing the transmission speed ratio of the two connecting wheel pairs and achieving stepless mechanical speed regulation.

[0004] However, in practical applications, the drive wheel, stationary wheel, motor, intermediate shaft gear and other actuator structures of the gearbox connecting parts are all installed inside the motorcycle. Therefore, during motorcycle assembly, the motor and other structures that make up the actuators need to be installed one by one before the pulley cover and other structures of the motorcycle can be installed, resulting in low overall motorcycle assembly efficiency. Utility Model Content

[0005] The present invention aims to provide a continuously variable transmission (CVT) and a motorcycle to solve the problem of low assembly efficiency in motorcycles.

[0006] To achieve the above objectives, this utility model adopts the following technical solution: a continuously variable transmission (CVT), including an actuator and a transmission mechanism. The transmission mechanism includes an input component, an output component, and a connecting member. The connecting member is tensioned between the input component and the output component. The output component includes a crankshaft, a primary pulley fixed pulley, and a primary pulley moving pulley. Both the primary pulley moving pulley and the primary pulley fixed pulley are located on the crankshaft, and the primary pulley moving pulley can move axially along the crankshaft. The primary pulley moving pulley is located on the side away from the motorcycle, and the primary pulley fixed pulley is located on the side closer to the motorcycle. The actuator includes a positioning mechanism... The displacement assembly includes a drive component, a reducer, an internal lead screw, and a sleeve. The reducer is coaxially mounted inside the drive component and meshes with the output end of the drive component. The sleeve is located at the output end of the reducer. The internal lead screw is sleeved on the outer wall of the sleeve and threadedly engaged with the sleeve. The end of the internal lead screw away from the drive component is rotatably connected to the primary pulley. The reducer can reduce the speed of the drive component and drive the sleeve to rotate, allowing the internal lead screw to move axially on the outer wall of the sleeve. This causes the primary pulley to move closer to or further away from the primary pulley, thereby changing the diameter of the input assembly tensioning connector.

[0007] Traditional ECVT transmissions include actuators, pulley housings, primary pulley fixed pulley, primary pulley driven pulley, secondary pulley fixed pulley, secondary pulley driven pulley, crankshaft, and output shaft. The actuators move the primary pulley driven pulley axially along the crankshaft to shift gears. Furthermore, the primary pulley fixed pulley is located near the pulley housing, meaning it's closer to the outside of the motorcycle, while the primary pulley driven pulley is closer to the inside. The transmission's motor, intermediate shaft gears, and other actuator structures are also installed inside the motorcycle's pulley housing. Therefore, during motorcycle assembly, the motor and other components must be installed one by one before the pulley housing and other structures can be installed, resulting in low overall motorcycle assembly efficiency.

[0008] The beneficial effects of this solution are as follows: To solve the above problems, the applicant has developed a technology that installs the actuator on the outside of the pulley housing cover. This means that the pulley housing cover can be installed first without installing the actuator, thus completing the motorcycle assembly first. After the motorcycle is assembled, the external actuator can be fastened to the pulley housing cover to quickly complete the installation of the gearbox actuator, effectively improving the motorcycle assembly efficiency. Moreover, the motorcycle assembly and actuator assembly can be carried out simultaneously. After the motorcycle is assembled, the assembled actuator can be directly connected to the motorcycle, making the actuator installation more convenient and improving the motorcycle assembly efficiency.

[0009] At the same time, the actuator, being independent of the motorcycle, can improve heat dissipation efficiency and can be equipped with an independent sealing and lubrication system. During motorcycle maintenance, the actuator and its lubrication system can be maintained separately without disassembling the motorcycle's powertrain, making maintenance more convenient.

[0010] In this design, the primary pulley drive wheel is located on the side closer to the pulley housing cover, and the primary pulley stationary wheel is located on the side closer to the motorcycle. Therefore, when the primary pulley drive wheel is moved along the axial direction of the sleeve by the actuator to shift gears, the structure that drives the primary pulley drive wheel to move will not be blocked by the primary pulley stationary wheel, thus enabling the aforementioned external attachment technology to be realized.

[0011] Preferably, as an improvement, the input component includes a secondary pulley fixed pulley, a secondary pulley moving pulley, and an output shaft. Both the secondary pulley moving pulley and the secondary pulley fixed pulley are located on the outer wall of the output shaft, and the secondary pulley moving pulley can move axially along the outer wall of the output shaft. The secondary pulley moving pulley is located on the side closer to the motorcycle, and the secondary pulley fixed pulley is located on the side farther away from the motorcycle. A limiting ring is provided at the end of the secondary pulley fixed pulley closer to the motorcycle, and a preload spring is provided between the limiting ring and the secondary pulley moving pulley.

[0012] The beneficial effects are as follows: by arranging the secondary pulley moving wheel and the secondary pulley stationary wheel in opposite directions to the primary pulley moving wheel and the primary pulley stationary wheel, stepless speed matching between the output component and the input component is achieved. The limit ring is used to install the preload spring, which is used to cooperate with the output component to change the distance between the secondary pulley moving wheel and the secondary pulley stationary wheel, thereby changing the diameter of the input component tensioning connector.

[0013] Preferably, as an improvement, the actuator further includes a measuring component, which includes a distance sensor and a signal block. The signal block is located on the outer wall of the inner lead screw and moves axially with the inner lead screw. The distance sensor is located on one side of the output end of the displacement component and can detect the movement distance of the signal block.

[0014] The advantages are: in this solution, only one sensor is needed to accurately measure displacement, and compared with the current method of using both angle sensor and stroke sensor to achieve displacement measurement, the structure of this solution is simpler and the weight of the measuring mechanism is smaller.

[0015] Preferably, as an improvement, the distance sensor is a stroke sensor, and the end of the signal block near the distance sensor has an inclined surface. The distance between the end of the inclined surface near the end of the inner lead screw and the inner lead screw is greater than or less than the distance between the end of the inclined surface away from the end of the inner lead screw and the inner lead screw.

[0016] The beneficial effects are as follows: Due to the inclined setting, there is a difference in the distance between the end of the inclined plane near the end of the inner lead screw and the end away from the end of the inner lead screw and the sensor. When shifting gears, the signal block moves axially synchronously, and the inclined plane moves accordingly. The relative position of the inclined plane and the sensor changes, so that the sensor can detect the change in the distance between itself and the signal block. The stroke sensor can collect the magnetic field change signal of the stroke displacement, thereby determining the position of the inclined plane more quickly and accurately, thus improving the measurement efficiency and accuracy.

[0017] Preferably, as an improvement, the speed change mechanism is located inside the pulley housing cover, the outer wall of the pulley housing cover has an opening, and a housing is located at the opening. The drive component and the reducer component are located on the outer wall of the housing at the end away from the pulley housing cover, and the output end of the reducer component rotates through into the housing. The sleeve, the inner lead screw, and the measuring component are all located inside the housing. A positioning groove is provided on the inner wall of the housing, and the positioning groove extends along the axial direction of the inner lead screw. The end of the signal block away from the inner lead screw is located in the positioning groove and slides in cooperation with the positioning groove.

[0018] The beneficial effects are as follows: During the gear shifting process, since the signal block is eccentrically set on the outer wall of the inner lead screw, the inner lead screw can be guided by the cooperation between the positioning groove and the signal block, thereby preventing the inner lead screw from rotating on its own. While simplifying the structure, it ensures that the inner lead screw can move axially, pushing the primary pulley along the axis, thereby completing the gear shifting.

[0019] Preferably, as an improvement, a first bearing is provided between the sleeve and the outer shell, and 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.

[0020] The beneficial effects are: the bearing supports the sleeve, preventing it from shaking during rotation. The connector is used to connect the reducer and the sleeve, allowing the drive component to rotate the sleeve.

[0021] Preferably, as an improvement, it also includes a mounting base, which is disposed on the outer wall of the housing, and the distance sensor is disposed on the mounting base.

[0022] The beneficial effect is that the sensor can be quickly installed in the preset position on the housing by simply mounting the mounting base on the housing.

[0023] Preferably, as an improvement, a limiting ring is provided at the end of the sleeve near the driving member, and a plurality of limiting rods are evenly provided at the end of the limiting ring near the inner lead screw, and the signal block can abut against the limiting rods; or a plurality of limiting grooves are evenly provided at the end of the limiting ring near the inner lead screw, and an abutting rod is provided at the end of the signal block near the limiting ring, and the abutting rod can abut against the inner wall of the limiting groove.

[0024] The beneficial effects are as follows: By setting a limiting ring on the outer wall of the sleeve to limit the movement distance of the inner lead screw on the outer wall of the sleeve, the inner lead screw is prevented from rotating out of the connection range of the sleeve. During the rotation of the sleeve, the limiting rod moves in a circular motion with the limiting ring. When the inner lead screw moves towards the sleeve, the rotating limiting rod will abut against the side wall of the signal block. When the signal block abuts against the limiting rod, the driving component controls the sleeve to stop rotating, thereby avoiding the signal block from hitting the limiting ring, and thus preventing the first bearing from deforming or being damaged under the impact of the inner lead screw, improving the service life of the actuator. Alternatively, by setting an abutting rod and a limiting groove, when the abutting rod abuts against the end of the limiting groove, the driving component controls the sleeve to stop rotating, thereby avoiding the signal block from hitting the limiting ring, and thus preventing the first bearing from deforming or being damaged under the impact of the inner lead screw, improving the service life of the actuator.

[0025] Preferably, as an improvement: the signal block includes a permanent magnet block, and the distance sensor is a Hall sensor.

[0026] The beneficial effect is that, through the Hall effect between the Hall sensor and the permanent magnet on the signal block, the moving distance of the signal block can be accurately detected.

[0027] A motorcycle comprising the continuously variable transmission (CVT) described above. Attached Figure Description

[0028] Figure 1 This is a top view of Embodiment 1 of the present invention;

[0029] Figure 2 for Figure 1 Sectional view at point AA. Detailed Implementation

[0030] The following detailed description illustrates the specific implementation method:

[0031] The reference numerals in the accompanying drawings include: 1. Pulley housing cover; 2. Crankshaft; 3. Primary pulley fixed pulley; 4. Primary pulley moving pulley; 5. Mounting tube; 6. Secondary pulley fixed pulley; 7. Secondary pulley moving pulley; 8. Output shaft; 9. First connecting tube; 10. Limiting ring; 11. Preload spring; 12. Housing; 13. Drive component; 14. Connecting component; 15. Oil seal; 16. Sleeve; 17. First bearing; 18. Internal lead screw; 19. Second connecting tube; 20. Second bearing; 21. Distance sensor; 22. Signal block; 23. Mounting base; 24. Inclined surface.

[0032] Example 1

[0033] Example 1 is basically as shown in the appendix. Figure 1-2 As shown, Figure 1The continuously variable transmission shown includes a pulley housing cover 1, an actuator, and a transmission mechanism. The pulley housing cover 1 is fixedly installed on the outer wall of the motorcycle by bolts. In this embodiment, the transmission mechanism is located inside the pulley housing cover 1. The transmission mechanism includes an input component, an output component, and a connecting component.

[0034] like Figure 2 The output component shown is located to the left of the input component. The output component includes a crankshaft 2, a primary pulley fixed pulley 3, and a primary pulley moving pulley 4. The primary pulley fixed pulley 3 is sleeved on the lower end of the crankshaft 2 and connected to the crankshaft 2 by a spline. The primary pulley moving pulley 4 is coaxially fixed with an installation tube 5. The installation tube 5 is sleeved on the outer wall of the crankshaft 2 and has a small clearance fit with the crankshaft 2, so that the primary pulley moving pulley 4 can move axially along the outer wall of the crankshaft 2. In this embodiment, the primary pulley moving pulley 4 is located above the primary pulley fixed pulley 3, that is, the primary pulley fixed pulley 3 is close to the inside of the motorcycle, while the primary pulley moving pulley 4 is close to the pulley housing cover 1.

[0035] The input component includes a secondary pulley fixed pulley 6, a secondary pulley movable pulley 7, and an output shaft 8. The upper and lower ends of the secondary pulley fixed pulley 6 are coaxially integrally formed with a first connecting pipe 9. The output shaft 8 passes through the secondary pulley fixed pulley 6 along the first connecting pipe 9 and drives the secondary pulley fixed pulley 6 to rotate synchronously. The secondary pulley movable pulley 7 is sleeved on the lower end of the first connecting pipe 9. The secondary pulley movable pulley 7 and the first connecting pipe 9 are fitted with a small clearance, so that the secondary pulley movable pulley 7 can move relative to the secondary pulley fixed pulley 6 along the first connecting pipe 9 axially. In this embodiment, the secondary pulley movable pulley 7 is located below the secondary pulley fixed pulley 6, that is, the secondary pulley fixed pulley 6 is close to the pulley housing cover 1, while the secondary pulley movable pulley 7 is close to the inside of the motorcycle. The lower end of the first connecting pipe 9 is integrally formed with a limit ring 10. The outer wall of the lower end of the first connecting pipe 9 is sleeved with a pre-tension spring 11, and the two ends of the pre-tension spring 11 abut against the secondary pulley movable pulley 7 and the limit ring 10, respectively.

[0036] The connector is tensioned between the input component and the output component. In this embodiment, the connector is a belt. Specifically, the left end of the belt is tensioned between the primary pulley drive pulley 4 and the primary pulley stationary pulley 3, and the right end of the belt is tensioned between the secondary pulley drive pulley 7 and the secondary pulley stationary pulley 6.

[0037] An opening is provided on the outer wall of the pulley housing cover 1 located above the output component. A housing 12 is fixedly installed at the opening by bolts. The housing 12 is used to install the actuator.

[0038] The actuator includes a displacement component and a measuring component. The measuring component measures the movement distance of the displacement component. The displacement component includes a drive component 13, a reducer, an internal lead screw 18, and a sleeve 16. The drive component 13 is bolted to the upper end of the housing 12. The reducer is coaxially disposed inside the drive component 13 and meshes with the output end of the drive component 13. The specific structure is as described in the prior art (Chinese Patent Publication No.: CN222423329U), and will not be elaborated further here. A connector 14 is bolted to the lower end of the output end of the reducer, and the lower end of the connector 14 rotates through an opening into the housing 12. An oil seal 15 is fixedly installed between the connector 14 and the housing 12. The sleeve 16 is located inside the housing 12, and the upper end of the sleeve 16 is interference-fitted to the lower end of the connector 14 via a spline. A first bearing 17 is fixedly installed between the sleeve 16 and the housing 12. The outer wall of sleeve 16 is threaded, and the inner lead rod 18 is threaded to the outer wall of sleeve 16. The upper end of the primary pulley 4 is coaxially integrally formed with a second connecting pipe 19, and the upper end of the second connecting pipe 19 extends into the sleeve 16 and is clearance-fitted with the sleeve 16. A second bearing 20 is fixedly installed between the inner lead rod 18 and the second connecting pipe 19. The second bearing 20 is not only used to connect the inner lead rod 18 and the second connecting pipe 19, so that the inner lead rod 18 can drive the primary pulley 4 to move axially through the second connecting pipe 19, but also to prevent the second connecting pipe 19 from driving the inner lead rod 18 to rotate, thereby improving the accuracy of the measuring component. An oil seal 15 is provided between the lower outer wall of the second connecting pipe 19 and the lower inner wall of the inner lead rod 18. The speed reducer can reduce the speed of the drive component 13 and drive the sleeve 16 to rotate, so that the inner lead rod 18 can move axially on the outer wall of sleeve 16.

[0039] It also includes a measuring component, which includes a distance sensor 21 and a signal block 22. The signal block 22 is located on the left side wall of the inner lead screw 18 and is integrally formed with the inner lead screw 18. A mounting base 23 is fixedly installed on the left end of the housing 12 by bolts. The distance sensor 21 is fixedly installed on the mounting base 23. The distance sensor 21 is a travel sensor. An inclined surface 24 is formed at the end of the signal block 22 opposite to the distance sensor 21. The inclined surface 24 is inclined to the left at the top and to the right at the bottom, so that the distance between the part of the inclined surface 24 opposite to the travel sensor and the travel sensor gradually increases from top to bottom. The inner wall of the outer casing 12 is provided with a positioning groove, which extends along the axial direction of the inner lead screw 18. The cross-section of the signal block 22 along the radial direction of the inner lead screw 18 is fan-shaped, which increases the contact area between the signal block 22 and the positioning groove and increases the stability of the inner lead screw 18 when it moves axially. The signal block 22 is located in the positioning groove and slides in cooperation with the positioning groove. The cooperation between the positioning groove and the signal block 22 can limit the inner lead screw 18, so that when the drive component 13 drives, the inner lead screw 18 can slide axially along the sleeve 16, thereby driving the primary belt pulley 4 to move axially along the crankshaft 2.

[0040] The upper outer wall of the sleeve 16 is integrally formed with a limiting ring. Several limiting rods (not shown in the figure) are uniformly fixedly installed at the lower end of the limiting ring by welding. In this embodiment, there are 3 limiting rods. By increasing the number of limiting rods, the probability of the signal block 22 abutting against the limiting rods is increased, thereby further avoiding the collision between the inner lead screw 18 and the limiting ring. When the inner lead screw 18 moves towards the sleeve 16, the rotating limiting rod will abut against the side wall of the signal block 22. When the signal block 22 abuts against the limiting rod, the driving component 13 controls the sleeve 16 to stop rotating, thereby avoiding the signal block 22 from hitting the limiting ring, and thus preventing the first bearing 17 from deforming or being damaged under the impact of the inner lead screw 18, thereby 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 22 can be fixedly installed by welding with abutting rods. The abutting rods abut against the end of the limiting grooves, thereby stopping the rotation of the sleeve 16 and avoiding the inner lead screw 18 from hitting the limiting ring.

[0041] The specific implementation process is as follows:

[0042] In this transmission structure, the actuator is housed within the outer casing 12, which is attached to the outer wall of the pulley housing 1. During installation, the inner lead screw 18 is not obstructed by the primary pulley fixed pulley 3, allowing for quick and secure connection with the primary pulley moving pulley 4. When the actuator needs to shift gears, the drive unit 13 is activated, and the output is transmitted through the reducer. This causes the connecting piece 14, connected to the output end of the reducer, to rotate the sleeve 16, causing the inner lead screw 18 to move axially along the sleeve 16. Simultaneously, the inner lead screw 18 drives the primary pulley moving pulley 4 to move synchronously. At this time, the signal block 22 also moves synchronously, causing a change in the position of the inclined plane 24 relative to the stroke sensor, resulting in a change in the distance detected by the stroke sensor. Based on the change and the slope of the inclined plane 24, the axial sliding distance of the inner lead screw 18 along the sleeve 16 can be quickly calculated. This distance is the axial movement distance of the primary pulley moving pulley 4 along the sleeve 16, thus determining the shift amount.

[0043] This application also proposes a motorcycle that includes the aforementioned continuously variable transmission (CVT), as well as other necessary components that make up the motorcycle, which will not be described in detail here but can be referred to in the prior art.

[0044] Example 2

[0045] Based on Embodiment 1, the signal block 22 in this embodiment is elongated and extends axially along the inner lead screw 18. The signal block 22 includes a permanent magnet; specifically, in this embodiment, the permanent magnet is a magnet, and the signal block 22 is formed by encapsulating a plastic shell around the magnet. The signal block 22 is bolted to the inner lead screw 18. Meanwhile, the distance sensor 21 in this embodiment is a Hall sensor, with its detection end located behind and opposite to the signal block 22. Compared to Embodiment 1, the Hall sensor in this embodiment utilizes the Hall effect to detect the movement distance of the signal block 22.

[0046] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. Continuously variable transmission, characterized in that: The system includes an actuator and a transmission mechanism. The transmission mechanism includes an input component, an output component, and a connector. The connector is tensioned between the input and output components. The output component includes a crankshaft, a primary pulley fixed pulley, and a primary pulley moving pulley. Both the primary pulley moving pulley and the primary pulley fixed pulley are located on the crankshaft, and the primary pulley moving pulley can move axially along the crankshaft. The primary pulley moving pulley is located on the side away from the motorcycle, and the primary pulley fixed pulley is located on the side closer to the motorcycle. The actuator includes a displacement component, which includes a drive component, a reducer, an internal lead screw, and a sleeve. The reducer is coaxially located inside the drive component and meshes with the output end of the drive component. The sleeve is located at the output end of the reducer. The internal lead screw is sleeved on the outer wall of the sleeve and threaded into the sleeve. The end of the internal lead screw away from the drive component is rotatably connected to the primary pulley moving pulley. The reducer can reduce the speed of the drive component and drive the sleeve to rotate, so that the internal lead screw can move axially on the outer wall of the sleeve, thereby causing the primary pulley moving pulley to move closer to or away from the primary pulley fixed pulley, thus changing the diameter of the input component tension connector.

2. Continuously variable transmission according to claim 1, characterized in that The input component includes a secondary pulley fixed pulley, a secondary pulley moving pulley, and an output shaft. Both the secondary pulley moving pulley and the secondary pulley fixed pulley are located on the outer wall of the output shaft, and the secondary pulley moving pulley can move axially along the outer wall of the output shaft. The secondary pulley moving pulley is located on the side closer to the motorcycle, and the secondary pulley fixed pulley is located on the side farther away from the motorcycle. A limit ring is provided at the end of the secondary pulley fixed pulley closer to the motorcycle, and a preload spring is provided between the limit ring and the secondary pulley moving pulley.

3. Continuously variable transmission according to claim 2, characterized in that The actuator also includes a measuring component, which includes a distance sensor and a signal block. The signal block is located on the outer wall of the inner lead screw and moves axially with the inner lead screw. The distance sensor is located on one side of the output end of the displacement component and can detect the movement distance of the signal block.

4. Continuously variable transmission according to claim 3, characterized in that The distance sensor is a stroke sensor. The end of the signal block near the distance sensor has an inclined surface. The distance between the end of the inclined surface near the end of the inner lead screw and the inner lead screw is greater than or less than the distance between the end of the inclined surface away from the end of the inner lead screw and the inner lead screw.

5. The continuously variable transmission according to claim 4, characterized in that: The speed change mechanism is located inside the pulley housing cover. An opening is provided on the outer wall of the pulley housing cover, and a housing is provided at the opening. The drive component and the reducer are located on the outer wall of the housing at the end away from the pulley housing cover, and the output end of the reducer rotates through into the housing. The sleeve, the inner lead screw, and the measuring components are all located inside the housing. A positioning groove is provided on the inner wall of the housing, and the positioning groove extends along the axial direction of the inner lead screw. The end of the signal block away from the inner lead screw is located in the positioning groove and slides in cooperation with the positioning groove.

6. Continuously variable transmission according to claim 5, characterized in that A first bearing is provided between the sleeve and the outer shell, and a connecting piece is provided at the output end of the speed reducer. The connecting piece is connected to the sleeve by a spline.

7. Continuously variable transmission according to claim 6, characterized in that It also includes a mounting base, which is located on the outer wall of the housing, and the distance sensor is located on the mounting base.

8. Continuously variable transmission according to claim 7, characterized in that A limiting ring is provided at one end of the sleeve near the drive component, and several limiting rods are evenly provided at one end of the limiting ring near the inner lead screw, and the signal block can abut against the limiting rods; or several limiting grooves are evenly provided at one end of the limiting ring near the inner lead screw, and an abutting rod is provided at one end of the signal block near the limiting ring, and the abutting rod can abut against the inner wall of the limiting groove.

9. Continuously variable transmission according to claim 3, characterized in that: The signal block includes a permanent magnet block, and the distance sensor is a Hall sensor.

10. A motorcycle characterized by the fact that: A continuously variable transmission comprising the continuously variable transmission of any one of claims 1 to 8.

Images