ECVT executing mechanism of motorcycle

Abstract

The utility model 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, and the sleeve is arranged at the output end of the speed reduction piece. The inner lead screw is arranged on the outer wall of the sleeve in a sleeving mode and matched with the sleeve in a threaded mode, and the speed reduction piece can decelerate the driving piece and drive the sleeve to rotate, so that the inner lead screw 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] This utility model relates to the field of motorcycle technology, specifically to a motorcycle ECVT actuator. Background Technology

[0002] The EVCT actuator in motorcycles is an electronic continuously variable transmission (CVT) technology. Its core lies in using an electronic control system to continuously change the gear ratio, thereby optimizing the vehicle's power output and fuel economy. This type of automatic transmission, capable of continuously changing the gear ratio, is characterized by the elimination of fixed gears; it achieves smooth acceleration and deceleration by adjusting the contact radius of the drive belt or chain. Widely used in automobiles, motorcycles, and other vehicles, this type of transmission offers advantages such as simple structure, small size, good fuel economy, and high driving comfort.

[0003] Existing continuously variable transmission (CVT) mechanisms for motorcycles mainly consist of variator pulley actuators. However, since CVTs rely primarily on friction between the belt and the pulley during operation, they suffer from low transmission efficiency, high fuel consumption, and wear-prone pulleys that require regular replacement. This results in high maintenance costs and low reliability. Furthermore, the low transmission efficiency limits their application to small-displacement motorcycles, making them unsuitable for high-performance motorcycles with high torque output. Therefore, we propose an ECVT actuator for motorcycles to address these issues. Utility Model Content

[0004] The present invention aims to provide an ECVT actuator for motorcycles to replace the plenum structure, thereby improving the reliability of the actuator and increasing transmission efficiency.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a motorcycle ECVT actuator, including a displacement assembly, the displacement assembly including a drive component, a reducer component, an inner lead screw and a sleeve, the reducer component being coaxially disposed inside the drive component and meshing with the output shaft of the drive component, the sleeve being disposed at the output end of the reducer component, the inner lead screw being sleeved on the outer wall of the sleeve and threadedly engaged with the sleeve, the reducer component being able to reduce the speed of the drive component and drive the sleeve to rotate, so that the inner lead screw can move axially on the outer wall of the sleeve.

[0006] The beneficial effects of this solution are as follows: the speed reducer can not only reduce the output speed of the drive component, but also reduce the impact and vibration caused by the high speed of the drive component, extend the service life of each component, and enhance the reliability of the system. By placing the speed reducer inside the drive component and meshing it with the output shaft of the drive component, the installation height of the drive component and the speed reducer is shortened, and the volume of the displacement component is reduced. Through the threaded engagement between the inner screw and the sleeve, the rotating sleeve drives the inner screw to move axially along its outer wall, thereby quickly pushing the primary pulley to move, thus improving the reliability of the actuator and improving the transmission efficiency.

[0007] Traditional ECVT transmissions include actuators, pulley housings, primary pulley fixed pulley, primary pulley driven pulley, secondary pulley fixed pulley, secondary pulley driven pulley, output shaft, and input shaft. The actuators move the primary pulley driven pulley axially along the output shaft 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] To address the aforementioned issues, the applicant has developed a technology that mounts the actuator on the outside of the pulley housing cover. This allows for the priority installation of the pulley housing cover without the need for an actuator, thus prioritizing the completion of the motorcycle's overall assembly. Once the motorcycle is assembled, the external actuator can be quickly attached to the pulley housing cover to complete the installation of the gearbox actuator, effectively improving the motorcycle's assembly efficiency. Furthermore, the motorcycle assembly and actuator assembly can be performed simultaneously. After the motorcycle is assembled, the assembled actuator can be directly connected to the motorcycle, making actuator installation more convenient and further enhancing the motorcycle's 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] Preferably, as an improvement, it 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 shaft of the displacement component and can detect the moving distance of the signal block.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] Preferably, as an improvement, it also includes a housing, with the measuring component disposed inside the housing, the driving component and the speed reducer disposed on the outer wall of the housing, and a positioning groove provided on the inner wall of the housing. The positioning groove extends axially along the output end of the speed reducer, and the end of the signal block away 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 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.

[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 effect is that setting the cross-section of the signal block to a fan shape can increase the contact area between the signal block and the positioning groove, thereby increasing the stability of the internal lead screw during axial movement.

[0018] Preferably, as an improvement, the output end of the speed reducer is provided with a connector, which is connected to the sleeve via a spline.

[0019] The beneficial effect is that the connector is used to connect the reducer and the sleeve, so that the drive can drive the sleeve to rotate.

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

[0021] The beneficial effect is that the bearing supports the sleeve, preventing it from shaking when rotating.

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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, thus 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, thus 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 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. 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: housing 1, drive component 2, connector 3, oil seal 4, sleeve 5, bearing 6, internal lead screw 7, distance sensor 8, signal block 9, mounting base 10, and inclined surface 11.

[0032] Example 1

[0033] Example 1 is basically as shown in the appendix. Figure 1-2 As shown, Figure 1The illustrated motorcycle ECVT actuator includes a housing 1 and a displacement assembly. The housing 1 is bolted to the outer wall of the motorcycle. The displacement assembly includes a drive component 2, a reduction component, an internal lead screw 7, and a sleeve 5. The drive component 2 is bolted to the upper end of the housing 1. The reduction component is coaxially disposed within the drive component 2 and meshes with the output shaft of the drive component 2. The specific structure is similar to existing technology (Chinese Patent Publication No.: CN222423329U), and will not be elaborated further here. Figure 2 As shown, the output end of the reducer is fixedly mounted with a connector 3 by bolts, and the lower end of the connector 3 rotatably penetrates into the housing 1. An oil seal 4 is fixedly installed between the connector 3 and the outer wall. The sleeve 5 is rotatably mounted inside the housing 1, and the upper end of the sleeve 5 is connected to the lower end of the connector 3 by a spline. A bearing 6 is fixedly installed between the upper end of the sleeve 5 and the housing 1. The outer wall of the sleeve 5 is threaded, and the inner screw 7 is threaded to the outer wall of the sleeve 5. The reducer can reduce the speed of the drive 2 and drive the sleeve 5 to rotate, so that the inner screw 7 can move axially on the outer wall of the sleeve 5.

[0034] It also includes a measuring component, which 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. The left end of the outer shell 1 is fixedly mounted with a mounting base 10 by bolts. The distance sensor 8 is fixedly mounted on the mounting base 10. The distance sensor 8 is a stroke sensor. The end of the signal block 9 opposite to the distance sensor 8 has an inclined surface 11. The inclined surface 11 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 11 opposite to the stroke sensor gradually increases from top to bottom. The inner wall of the outer shell 1 has a positioning groove that 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 of the inner lead screw 7 when it moves axially. The signal block 9 is located in the positioning groove and slides in cooperation 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 drive component 2 drives, the inner lead screw 7 can slide axially along the sleeve 5, thereby driving the primary pulley to move axially.

[0035] The upper outer wall of the sleeve 5 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 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 component 2 controls the sleeve 5 to stop rotating, thereby avoiding the signal block 9 from hitting the limiting ring, and thus preventing the bearing 6 from deforming or being damaged under the impact of the inner lead screw 7, improving the service life of the actuator. Of course, 3 limiting grooves can also be opened at the lower end of the limiting ring. The upper end of the signal block 9 is fixedly installed with abutting rods by welding. The abutting rods abut against the end of the limiting grooves, thereby stopping the rotation of the sleeve 5 and avoiding the inner lead screw 7 from hitting the limiting ring.

[0036] The specific implementation process is as follows:

[0037] When the actuator needs to shift gears, the drive unit 2 is activated and output is transmitted through the reducer. This causes the connecting piece 3, which is connected to the output end of the reducer, to rotate the sleeve 5, causing the inner lead screw 7 to move along the axial direction of the sleeve 5. At the same time, the inner lead screw 7 drives the primary pulley to move synchronously. At this time, the signal block 9 also moves synchronously, and the position of the inclined plane 11 relative to the stroke sensor changes, causing the distance detected by the stroke sensor to change. Based on the change and the slope of the inclined plane 11, the sliding distance of the inner lead screw 7 along the axial direction of the sleeve 5 can be quickly calculated. This distance is the distance the primary pulley moves along the axial direction of the sleeve 5, thereby determining the gear shift amount.

[0038] Example 2

[0039] Based on Embodiment 1, the signal block 9 in this embodiment is elongated and extends axially along the inner lead screw 7. The signal block 9 includes a permanent magnet; specifically, in this embodiment, the permanent magnet is a magnet, and the signal block 9 is formed by encapsulating a plastic shell around the magnet. The signal block 9 is mounted on the inner lead screw 7 by bolts. Meanwhile, the distance sensor 8 in this embodiment is a Hall sensor, with its detection end located behind and opposite the signal block 9. Compared to Embodiment 1, the Hall sensor in this embodiment utilizes the Hall effect to detect the movement distance of the signal block 9.

[0040] 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. A motorcycle ECVT actuator, characterized in that: The device includes a displacement assembly, which comprises a drive component, a reducer, an inner lead screw, and a sleeve. The reducer is coaxially disposed within the drive component and meshes with the output shaft of the drive component. The sleeve is disposed at the output end of the reducer. The inner lead screw is sleeved on the outer wall of the sleeve and threadedly engaged with the sleeve. The reducer can reduce the speed of the drive component and drive the sleeve to rotate, so that the inner lead screw can move axially on the outer wall of the sleeve.

2. The motorcycle ECVT actuator according to claim 1, characterized in that: It 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 shaft of the displacement component and can detect the movement distance of the signal block.

3. The motorcycle ECVT actuator according to claim 2, 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.

4. The motorcycle ECVT actuator according to claim 3, characterized in that: It also includes a housing, with the measuring components located inside the housing, and the driving and reducing components located on the outer wall of the housing. A positioning groove is provided on the inner wall of the housing, extending axially along the output end of the reducing component. The end of the signal block away from the inner lead screw is slidably installed in the positioning groove.

5. The motorcycle ECVT actuator according to claim 4, characterized in that: 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: The output end of the speed reducer is equipped with a connector, which is connected to the sleeve via a spline.

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

8. The motorcycle ECVT actuator according to claim 7, 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.

9. The motorcycle ECVT actuator according to claim 8, 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.

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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