Displacement measuring mechanism for ECVT actuator

Abstract

The utility model relates to the field of motorcycles, and particularly discloses a displacement measuring mechanism for an ECVT actuator. Comprising a distance sensor and a signal block, the signal block can move in the axial direction of the output shaft, and the distance sensor is located in the side direction of the output shaft and can detect the moving distance of the signal block. According to the displacement measuring mechanism for the CVT actuator, the problem that the structure of the displacement measuring mechanism is relatively complex is solved.

Description

Technical Field

[0001] This utility model relates to the field of motorcycles, and more specifically to the field of displacement measurement for ECVT actuators. Background Technology

[0002] Most motorcycles currently use continuously variable transmissions (CVTs) with plenum plates. When a CVT is working, the plenum plates are affected by the engine speed. As the speed gradually increases, the plenum plates are subjected to an outward force against the large spring, causing them to move radially along the outer edge of the slide plate. This increases the force pressing against the axially moving driven plate, increasing its working radius and decreasing the diameter of the driven plate, thus changing the gear ratio and achieving continuously variable transmission. Current CVTs require an angle sensor to measure rotational angle and a stroke sensor to measure linear displacement. The angle sensor is mounted on the input or output shaft to monitor the shaft's rotational angle, while the stroke sensor is mounted on the pulley adjustment structure to monitor pulley position changes. The coordinated action of these two sensors is essential for accurate control of the CVT.

[0003] Because continuously variable transmissions (CVTs) primarily rely on friction between the belt and the pulleys for power transmission, they suffer from low transmission efficiency, high fuel consumption, and the pulleys are prone to wear and require regular replacement, resulting in high maintenance costs and low reliability. The low transmission efficiency also limits their application to small-displacement vehicles, making them unsuitable for high-performance motorcycles with high torque output. While current ECVT transmissions also employ mechanical displacement sensors for displacement measurement, the measurement mechanism remains relatively complex. Utility Model Content

[0004] The present invention aims to provide a displacement measuring mechanism for ECVT actuators to solve the problem of relatively complex structure of displacement measuring mechanisms.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a displacement measuring mechanism for an ECVT actuator, comprising a distance sensor and a signal block, wherein the signal block can move along the axial direction of the output shaft, and the distance sensor is located on the side of the output shaft and can detect the moving distance of the signal block.

[0006] The beneficial effects of this plan are:

[0007] In this solution, the distance sensor can directly measure the movement distance of the signal block. Therefore, only one sensor is needed to accurately measure the displacement. Compared with the current method of using both angle sensor and stroke sensor to achieve displacement measurement, this solution has a simpler structure and a lighter measuring mechanism.

[0008] In traditional ECVT transmissions, the transmission's motor, intermediate shaft gears, and other actuators are installed inside the motorcycle. Therefore, during motorcycle assembly, the motor and other components that make up the actuators must be installed one by one before installing the pulley cover and other structures, resulting in low overall motorcycle assembly efficiency. To solve this problem, the applicant has developed a technology that mounts the actuator structure on the outside of the motorcycle pulley cover. This allows for the priority installation of the pulley cover without needing to install the actuator itself, effectively improving motorcycle assembly efficiency. Furthermore, motorcycle assembly and actuator assembly can be performed simultaneously; after motorcycle assembly, the assembled actuator can be directly connected to the motorcycle, making actuator installation more convenient and further improving assembly efficiency. Simultaneously, having the actuator independent of the motorcycle improves heat dissipation efficiency and allows for independent sealing and lubrication systems. During motorcycle maintenance, the actuator and its lubrication system can be maintained separately without disassembling the motorcycle's powertrain, making maintenance more convenient.

[0009] Based on the above improvements, the measuring mechanism in the applicant's solution effectively reduces the weight and space occupied by the measuring mechanism. When applied to the actuator, it can reduce the weight and volume of the actuator, making the actuator more secure when suspended on the outside of the motorcycle.

[0010] Furthermore, the signal block has an inclined surface on the side facing the distance sensor, and the distance between the end of the inclined surface near the output shaft and the output shaft is greater than or less than the distance between the end of the inclined surface away from the output shaft and the output shaft.

[0011] The beneficial effects of this plan are:

[0012] In this solution, the axial movement distance of the signal block is determined by the cooperation of a distance sensor and an inclined plane. Due to the inclined plane's tilt, there is a difference in the distance between the sensor and the end of the inclined plane closer to the output shaft and the end farther from the output shaft. When shifting gears, the signal block moves axially synchronously, and the inclined plane moves accordingly. The relative positions of the inclined plane and the sensor change, and the distance detected by the sensor changes. Therefore, this solution only requires one sensor to accurately measure displacement. Compared with the current method of using both angle and stroke sensors to achieve displacement measurement, this solution has a simpler structure and a lighter measuring mechanism.

[0013] Furthermore, the cross-section of the inclined plane along the radial direction of the output shaft is fan-shaped.

[0014] The beneficial effects of this solution are as follows: When the signal block rotates with the output shaft without shifting gears, the distance between the inclined plane and the sensor remains the same, and the distance measured by the sensor will not change, thereby further improving the side profile accuracy.

[0015] Furthermore, the distance sensor is a travel sensor.

[0016] The beneficial effects of this solution are: 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 measurement efficiency and accuracy.

[0017] Furthermore, it also includes an inner lead screw, which is sleeved on the outside of the output shaft and can move along the axial direction of the output shaft, with a signal block mounted on the inner lead screw.

[0018] The beneficial effects of this solution are as follows: when shifting gears, the primary pulley is driven to move synchronously along the axial direction by adjusting the inner lead screw. The inner lead screw is located on the outside of the output shaft, and the signal block is located on the inner lead screw and will not be blocked by other structures, thus ensuring that the distance sensor can perform detection.

[0019] Furthermore, a sleeve is coaxially fixed to the output shaft gear, and the inner screw is sleeved on the sleeve and threaded into the sleeve.

[0020] The beneficial effects of this solution are as follows: the output shaft gear drives the sleeve to rotate, which in turn drives the internal lead screw to move axially through the thread between the sleeve and the internal lead screw, pushing the primary pulley axially to achieve gear shifting. During this process, the sleeve supports the internal lead screw. After the signal block is eccentrically positioned on the internal lead screw, a limiting groove that mates with the signal block is provided on the gearbox housing. The engagement between the signal block and the side wall of the limiting groove guides the internal lead screw, preventing it from rotating. This simplifies the structure while ensuring that the internal lead screw can be adjusted axially, thus completing gear shifting.

[0021] Furthermore, a bearing is provided between the internal lead screw and the primary belt pulley.

[0022] The beneficial effect of this solution is that the bearing supports the sleeve, so that the sleeve will not rotate when the output shaft rotates.

[0023] Furthermore, it also includes a mounting base on which the sensor is mounted.

[0024] The beneficial effect of this solution is that the sensor can be quickly installed in a preset position inside the gearbox by simply mounting the mounting bracket on the gearbox housing.

[0025] Furthermore, the signal block includes a permanent magnet block, and the distance sensor is a Hall sensor.

[0026] The beneficial effect of this scheme is that the movement distance of the signal block can be accurately detected through the Hall effect between the Hall sensor and the permanent magnet on the signal block. Attached Figure Description

[0027] Figure 1 This is a front view of Embodiment 1 of this utility model. Detailed Implementation

[0028] The following detailed description illustrates the specific implementation method:

[0029] The reference numerals in the accompanying drawings include: internal lead screw 1, signal block 2, inclined plane 21, output shaft gear 3, mounting base 4, stroke sensor 5, gearbox housing 6, primary pulley drive wheel 7, and bearing 8.

[0030] Example 1

[0031] Example 1 is basically as follows Figure 1 As shown, the displacement measuring mechanism for the ECVT actuator includes a distance sensor, a mounting base 4, a signal block 2, an inner lead screw 1, and a sleeve. The sleeve is fitted onto the output shaft, with its upper end coaxially fixed to the output shaft gear 3, and a bearing 8 installed between its lower end and the output shaft. The inner lead screw 1 is fitted onto the sleeve and threaded into it. The signal block 2 is welded to the left end of the inner lead screw 1, and its cross-section along the radial direction of the inner lead screw 1 is fan-shaped.

[0032] In this embodiment, the distance sensor is a stroke sensor 5, which is mounted on the mounting base 4 and located to the left of the signal block 2. Specifically, the mounting base 4 is bolted to the gearbox housing 6. The side of the signal block 2 facing away from the inner lead screw 1 is an inclined surface 21, which is opposite to the stroke sensor 5. Specifically, in this embodiment, the inclined surface 21 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 21 opposite to the stroke sensor 5 gradually increases from top to bottom.

[0033] The specific implementation process is as follows:

[0034] When a gear shift is required, the sleeve rotates with the output shaft gear 3, causing the inner lead screw 1 to move axially along the sleeve, which in turn drives the primary pulley 7 to move synchronously. At this time, the signal block 2 also moves synchronously, and the position of the inclined plane 21 opposite to the stroke sensor 5 changes, causing the distance detected by the stroke sensor 5 to change. Based on the change and the slope of the inclined plane 21, the distance that the inner lead screw 1 slides axially can be quickly calculated. This distance is the distance that the primary pulley 7 moves axially, thus determining the gear shift amount.

[0035] Example 2

[0036] Based on Embodiment 1, the difference lies in that the signal block 2 in this embodiment is elongated and extends axially along the inner lead screw 1. The signal block 2 includes a permanent magnet; specifically, in this embodiment, the permanent magnet is a magnet, and the signal block 2 is formed by encapsulating a plastic shell around the magnet. The signal block 2 is mounted on the inner lead screw 1 by bolts. Meanwhile, the distance sensor in this embodiment is a Hall sensor, with its detection end located behind and opposite to the signal block 2. Compared to Embodiment 1, the Hall sensor in this embodiment utilizes the Hall effect to detect the movement distance of the signal block 2.

[0037] 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 displacement measuring mechanism for an ECVT actuator, characterized in that: It includes a distance sensor and a signal block, the signal block being movable along the axial direction of the output shaft, and the distance sensor being located laterally to the output shaft and capable of detecting the moving distance of the signal block.

2. The displacement measuring mechanism for ECVT actuators according to claim 1, characterized in that: The signal block has an inclined surface on the side facing the distance sensor. The distance between the end of the inclined surface near the output shaft and the output shaft is greater than or less than the distance between the end of the inclined surface away from the output shaft and the output shaft.

3. The displacement measuring mechanism for ECVT actuators according to claim 2, characterized in that: The cross-section of the inclined plane along the radial direction of the output shaft is fan-shaped.

4. The displacement measuring mechanism for ECVT actuators according to claim 1, characterized in that: The distance sensor is a travel sensor.

5. The displacement measuring mechanism for an ECVT actuator according to claim 1, characterized in that: It also includes an inner lead screw, which is sleeved on the outside of the output shaft and can move along the axial direction of the output shaft, and the signal block is disposed on the inner lead screw.

6. The displacement measuring mechanism for an ECVT actuator according to claim 5, characterized in that: The output shaft gear is coaxially fixed with a sleeve, and the inner screw is sleeved on the sleeve and threaded into the sleeve.

7. The displacement measuring mechanism for an ECVT actuator according to claim 6, characterized in that: A bearing is provided between the internal lead screw and the primary belt pulley.

8. The displacement measuring mechanism for an ECVT actuator according to claim 1, characterized in that: It also includes a mounting base on which the distance sensor is mounted.

9. The displacement measuring mechanism for an ECVT actuator according to claim 1, characterized in that: The signal block includes a permanent magnet block, and the distance sensor is a Hall sensor.

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