Motorcycle ECVT actuator

Abstract

The utility model relates to the field of motorcycle transmission, disclose motorcycle ECVT actuating mechanism, including driving part and transmission mechanism, transmission mechanism includes the driving gear, intermediate gear and driven gear that engage in proper order, be equipped with the screw portion on the driven gear, the screw portion is connected with the screw rod in screw thread, driving part drives the screw rod to push the axial movement of the moving disc axle. To replace the inertia of prilzhu and make the belt moving disc produce axial displacement and make the belt contact diameter change, thereby reliable, efficient, suitable for big torque stepless speed change.

Description

Technical Field

[0001] This utility model relates to the field of motorcycle transmissions, specifically to the ECVT actuator for motorcycles. Background Technology

[0002] Motorcycle CVTs mainly consist of continuously variable transmissions with plenum plates. When the CVT is working, the plenum plates are affected by the engine speed. As the speed gradually increases, the plenum plates overcome the outward force of the large spring and move radially along the outer edge of the disc along the slide groove. This increases the force that compresses the axially moving disc, increases the working radius, reduces the diameter of the disc, and changes the rotation ratio, thereby achieving continuously variable transmission.

[0003] The drawbacks of this technology:

[0004] 1. Low transmission efficiency; Because the continuously variable transmission system relies on the friction transmission between the belt and the pulley, the transmission efficiency is relatively low, resulting in high fuel consumption.

[0005] 2. Low reliability and high maintenance cost: Although the structure is simple, components such as the pulley are prone to wear and tear and need to be replaced regularly;

[0006] 3. Limited application range: Due to its low transmission efficiency, the variator continuously variable transmission (CVT) is usually used in small-displacement vehicles and is not suitable for high-performance motorcycles with high torque output. Utility Model Content

[0007] This utility model aims to provide a motorcycle ECVT actuator that replaces the plenum which relies on inertia to cause the belt to drive the disc axially, thereby changing the belt contact diameter and achieving reliable, efficient, and high-torque continuously variable transmission.

[0008] To achieve the above objectives, the present invention adopts the following technical solution: The motorcycle ECVT actuator includes a driving component and a transmission mechanism. The transmission mechanism includes a driving gear, an intermediate gear, and a driven gear that mesh in sequence. The driven gear is provided with a threaded part, and a lead screw is threadedly connected to the threaded part. The driving component drives the lead screw to push the moving disc to move axially.

[0009] The beneficial effects of this plan are:

[0010] The intermediate gear reduces speed and increases torque for the drive component. Through a threaded connection with a lead screw, it converts rotational motion into axial movement, thereby compressing the moving disc and changing its diameter. Subsequently, the belt's inertia causes the belt to move axially, changing the belt contact diameter and achieving reliable, efficient, and high-torque continuously variable transmission (CVT). In this design, there are one or more intermediate gears. Furthermore, the drive gear includes an external gear and an internal gear coaxially connected. The output shaft of the drive component meshes with the internal gear, and the external gear meshes with the intermediate gear.

[0011] Furthermore, the intermediate gear includes a small intermediate gear and a large intermediate gear that are coaxially connected. The large intermediate gear meshes with the external gear of the driving gear, and the small intermediate gear meshes with the driven gear.

[0012] Furthermore, the lead screw is a tubular object with threads on the inner side. One end of the lead screw is used for detachable connection with the moving plate inside the gearbox, and the other end of the lead screw is sleeved on the outside of the drive gear and threadedly connected to the drive gear.

[0013] Furthermore, a displacement measuring unit is provided on the side of the lead screw. The displacement measuring unit includes a distance sensor and a signal block. The signal block is located on the lead screw and can move with the lead screw. The distance sensor is located on the side of the output shaft and can detect the moving distance of the signal block.

[0014] The signal block has an inclined surface on the side facing the distance sensor. The distance between one end of the inclined surface and the main input shaft is greater than or less than the distance between the other end and the main input shaft. In this scheme, the axial movement distance of the signal block is determined by the cooperation between the distance sensor and the inclined surface.

[0015] Alternatively, the signal block may include a permanent magnet block, and the distance sensor may be a Hall sensor. In this solution, the movement distance of the signal block can be accurately detected through the Hall effect between the Hall sensor and the permanent magnet block on the signal block.

[0016] Furthermore, the limiting hole includes a positioning notch for accommodating the signal block, and the signal block and the positioning notch cooperate to limit the rotation of the lead screw.

[0017] Furthermore, it includes a housing, which is disposed between the gearbox and the motorcycle body, with the gearbox drive plate disposed on the side closer to the motorcycle body.

[0018] Furthermore, it includes a housing mounted on the outer surface of the gearbox, with the gearbox's drive plate positioned on the side away from the motorcycle body.

[0019] Furthermore, a first limiting part is provided circumferentially between the driven gear and the lead screw. Before the lead screw abuts against the driven gear, the first limiting part abuts against the signal block.

[0020] Furthermore, the driven gear has several arc-shaped grooves circumferentially arranged on the side near the lead screw, and the parts between the arc-shaped grooves protrude relative to each other to form a first limiting part; the signal block has a second limiting part on the side near the driven gear, and the rotation trajectory of the second limiting part is projected within the range of the arc-shaped grooves and the first limiting part. Before the lead screw abuts against the driven gear, the first limiting part and the second limiting part abut against each other.

[0021] This solution also has the following effects:

[0022] 1. Internal gears have the advantages of compact structure, smooth transmission, high precision and high overlap. Since they are in direct contact with the output shaft of the drive component, they can be removed and maintained together with the output shaft of the drive component, without the need for separate maintenance.

[0023] 2. To achieve a more symmetrical and regular overall appearance for easier installation on a motorcycle and maximize space utilization, this design places the motor output shaft as close as possible to the center of the overall structure. This facilitates the connection and fixation of the power input motor to the design, resulting in a compact structure, reasonable layout, and space-saving effect. Compared to a linear arrangement, this design forms a triangle with the drive shaft, driven shaft, and output shaft. With a constant gear radius, this minimizes the outer contour area of ​​the overall plane, further saving space.

[0024] 3. A traditional ECVT transmission includes an actuator, pulley cover, fixed plate, and moving plate. The actuator moves the moving plate axially to achieve continuously variable shifting. The fixed plate is located near the pulley cover, i.e., closer to the outside of the motorcycle, while the moving plate is closer to the inside. The actuator structure is also installed inside the pulley cover. Therefore, during motorcycle assembly, the motor and other components that make up the actuator must be installed one by one before the pulley cover and other components can be installed. In other words, all the above parts need to be prepared and then installed at once. This process involves many and complex parts, resulting in low overall motorcycle assembly efficiency.

[0025] In this solution, the driving components, drive gear, intermediate gear, and driven gear of the actuator are first integrated onto the housing. The supplier can assemble the actuator in advance and sell it uniformly. The processing plant can first install the gearbox on the motorcycle body, and then fix the integrated actuator directly to the outside of the gearbox pulley cover. The lead screw of the actuator is connected to the gearbox drive plate, thereby achieving rapid assembly. Finally, the pulley cover and the housing are connected by bolts and other parts.

[0026] 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.

[0027] The gearbox that is paired with this solution has its drive plate closer to the outside of the motorcycle, that is, the side closer to the pulley housing cover. Therefore, when the drive plate is moved axially along the output shaft to achieve gear shifting, the structure that drives the drive plate to move will not be blocked by the fixed plate, thus enabling the above-mentioned external attachment technology to be realized.

[0028] 4. Due to the inclined surface of the signal block, there is a difference in the distance between the end of the inclined surface near the output shaft and the end away from the output shaft and the distance sensor. When shifting gears, the signal block moves axially synchronously, and the inclined surface moves accordingly. The relative position of the inclined surface and the distance sensor changes, and the distance detected by the distance sensor changes. Therefore, this solution only needs to set up one distance sensor to accurately measure 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.

[0029] In this scheme, the distance sensor is a Hall effect travel sensor, which can collect the magnetic field change signal of the travel displacement, thereby determining the position of the inclined plane more quickly and accurately, thus improving measurement efficiency and accuracy. Attached Figure Description

[0030] Figure 1 This is a top view of Example 1 installed on the gearbox;

[0031] Figure 2 This is a front view of Example 1 installed on the gearbox;

[0032] Figure 3 for Figure 2 Sectional view along axis AA;

[0033] Figure 4 This is a top view of Example 2 installed on the gearbox;

[0034] Figure 5 for Figure 4 Sectional view along axis AA;

[0035] Figure 6 for Figure 4 BB-direction sectional view. Detailed Implementation

[0036] The following detailed description illustrates the specific implementation method:

[0037] The reference numerals in the accompanying drawings include: housing 1, moving disc 2, motor 3, driving gear 4, driving shaft 41, external gear 42, internal gear 43, intermediate gear 5, intermediate shaft 51, small intermediate gear 52, large intermediate gear 53, driven gear 6, driven shaft 61, threaded part 62, lead screw 7, distance sensor 81, signal block 82, and housing cover 9.

[0038] Example 1

[0039] Example 1 is basically as follows Figures 1-3As shown: The motorcycle ECVT actuator includes a housing 1, which is disposed between the gearbox and the motorcycle body. The gearbox drive plate 2 is disposed on the side closer to the motorcycle body. The housing 1 contains a drive component and a transmission mechanism. The drive component is a motor 3, which is bolted to the motorcycle body. The transmission mechanism includes a drive shaft 41, an intermediate shaft 51, and a driven shaft 61. The central axes (centers) of the drive shaft 41, intermediate shaft 51, and driven shaft 61 are connected to form a triangle.

[0040] like Figure 3 As shown in the figure, the upper side is the side closest to the motorcycle body; the lower end of the drive shaft 41 is assembled and rotated with the outer housing 1 using a bearing. The drive shaft 41 has an external gear 42 and an internal gear 43 integrally formed on the same axis. The drive shaft 41, the external gear 42 and the internal gear 43 form the drive gear 4. The internal gear 43 is located above the external gear 42 with its opening facing upward, and it meshes with the output shaft of the drive component. The output shaft of the drive component is eccentrically set relative to the internal gear 43.

[0041] The intermediate shaft 51 is inserted into the housing 1 and rotatably connected to the housing 1. A small intermediate gear 52 and a large intermediate gear 53 are integrally formed on the intermediate shaft 51. The small intermediate gear 52 is located below the large intermediate gear 53. The large intermediate gear 53 meshes with the external gear 42. The intermediate shaft 51, the small intermediate gear 52, and the large intermediate gear 53 constitute the intermediate gear 5.

[0042] The driven shaft 61 is inserted into and rotatably connected to the motorcycle body. A driven gear 6 is integrally formed on the driven wheel. A ball bearing is provided between the driven gear 6 and the driven shaft 61. The driven gear 6 meshes with the small intermediate gear 52. The lower surface of the driven gear 6 is provided with a threaded part 62. A lead screw 7 is threadedly connected to the threaded part 62. The lead screw 7 is a tubular object with threads on the inner side. The lower end of the lead screw 7 is used to engage with the moving disc 2 in the gearbox. After the lower end of the lead screw 7 is engaged, the lead screw 7 and the moving disc 2 move axially together. In this embodiment, the engagement can be achieved by partially inserting the lead screw 7 into the chuck and clamping it.

[0043] The inner side of the housing 1 has an inward convex groove (not shown in the figure). A limit block is integrally formed on the lead screw 7. The limit block is slidably disposed in the groove. The groove is used to limit the rotation of the limit block and the lead screw 7.

[0044] Example 2

[0045] like Figures 4-6 As shown, the difference between Embodiment 2 and Embodiment 1 is that the housing 1 is installed on the outer surface of the gearbox, and the corresponding gearbox drive plate 2 is located on the side away from the motorcycle body.

[0046] It also includes a cover 9, which mates with the housing 1 to protect the internal transmission mechanism, such as... Figure 6As shown, the lower side is the side close to the motorcycle body and gearbox. The drive component is bolted to the housing 1. Compared with embodiment 1, the structure of the drive gear 4 is reversed: the inner gear 43 is located below the outer gear 42 and the opening is downward, and it meshes with the output shaft of the drive component; the structure and meshing method of the intermediate gear 5 and the driven gear 6 remain unchanged, and the upper end of the drive shaft 41 is assembled with the housing cover 9 using a shoulder bushing.

[0047] The driven shaft 61 and the driven gear 6 are integrally formed on their upper surfaces. A ball bearing is provided between the driven shaft 61 and the housing cover 9, thereby enabling the driven shaft 61 and the housing cover 9 to be rotatably connected.

[0048] like Figure 5 As shown, a displacement measuring unit is provided on one side of the lead screw 7. The displacement measuring unit includes a distance sensor 81 and a signal block 82. The signal block 82 is the limiting block in Embodiment 1. The signal block 82 is integrally formed on the outside of the lead screw 7. The distance sensor 81 is bolted to the inside of the housing 1. The side of the signal block 82 facing the distance sensor 81 has an inclined surface. 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 other end and the output shaft. The distance sensor 81 is a stroke sensor that can collect the magnetic field change signal of the stroke displacement, thereby determining the position of the inclined surface more quickly and accurately.

[0049] Example 3

[0050] Example 3 is based on Example 2: Several first limiting parts are welded at equal angles around the driven gear 6 near the lead screw 7. The specific number is determined according to the design. In this example, three first limiting parts are welded. The first limiting parts are pins. When the lead screw 7 rotates close to the driven gear 6 to the limit position, the signal block 82 on the lead screw 7 abuts against one of the pins, thereby preventing the lead screw 7 from directly hitting the driven gear 6, thus avoiding damage to the ball bearing between the driven gear 6 and the driven shaft 61.

[0051] Example 4

[0052] Example 4 is based on Example 2: As an improvement of Example 2, since the thickness of the driven gear 6 is usually not too thick, if the pin is directly welded to the driven gear 6, it will easily affect the mechanical properties of the driven gear 6.

[0053] Therefore, in this solution, the driven gear 6 is provided with three arc-shaped grooves on the side near the lead screw 7, and the part between the arc-shaped grooves protrudes to form a first limiting part; the signal block 82 is provided with a second limiting part on the side near the driven gear 6, and the rotation trajectory of the second limiting part is projected within the range of the arc-shaped groove and the first limiting part. When the lead screw 7 rotates close to the driven gear 6 to the limit position, the second limiting part first rotates into the arc-shaped groove, and then the second limiting part continues to rotate until it abuts against the first limiting part.

[0054] Example 5

[0055] The difference between Example 5 and Example 2 is that in Example 2, the signal block 2 is elongated and extends along the axial direction of the lead screw 1. The signal block 2 includes a permanent magnet; specifically, in this example, 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 lead screw 1 by bolts. Meanwhile, the distance sensor in this example uses a Hall effect sensor, with its detection end located behind and opposite the signal block 2. Compared to Example 2, the Hall effect sensor in this example utilizes the Hall effect to detect the movement distance of the signal block 2.

[0056] The limiting hole includes a positioning notch for accommodating the signal block 82, and the signal block 82 and the positioning notch cooperate to limit the rotation of the lead screw 7.

[0057] 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: It includes a driving component and a transmission mechanism. The transmission mechanism includes a driving gear, an intermediate gear and a driven gear that mesh in sequence. The driven gear is provided with a threaded part, and a lead screw is threadedly connected to the threaded part. The driving component drives the lead screw to push the moving disc to move axially.

2. The motorcycle ECVT actuator according to claim 1, characterized in that: The driving gear includes an external gear and an internal gear that are coaxially connected. The output shaft of the driving component meshes with the internal gear, and the external gear meshes with the intermediate gear.

3. The motorcycle ECVT actuator according to claim 1, characterized in that: The intermediate gears include a small intermediate gear and a large intermediate gear that are coaxially connected. The large intermediate gear meshes with the external gear of the driving gear, and the small intermediate gear meshes with the driven gear.

4. The motorcycle ECVT actuator according to claim 1, characterized in that: The lead screw is a tubular object with threads on the inside. One end of the lead screw is used to detachably connect to the moving plate in the gearbox, and the other end of the lead screw is sleeved on the outside of the drive gear and threadedly connected to the drive gear.

5. The motorcycle ECVT actuator according to claim 4, characterized in that: A displacement measuring unit is provided on the side of the lead screw. The displacement measuring unit includes a distance sensor and a signal block. The signal block is located on the lead screw and can move with the lead screw. The distance sensor is located on the side of the output shaft and can detect the moving distance of the signal block. The signal block has an inclined surface on the side facing the distance sensor, and the distance between one end of the inclined surface and the main input shaft is greater than or less than the distance between the other end and the main input shaft. Alternatively, the signal block may include a permanent magnet block, and the distance sensor may be a Hall sensor.

6. The motorcycle ECVT actuator according to claim 5, characterized in that: The limiting hole includes a positioning notch for accommodating the signal block, and the signal block and the positioning notch cooperate to limit the rotation of the lead screw.

7. The motorcycle ECVT actuator according to claim 1, characterized in that: It includes a housing, which is located between the gearbox and the motorcycle body, with the gearbox drive plate located on the side closer to the motorcycle body.

8. The motorcycle ECVT actuator according to claim 1, characterized in that: It includes a housing, which is mounted on the outer surface of the gearbox, and the gearbox's drive plate is located on the side away from the motorcycle body.

9. The motorcycle ECVT actuator according to claim 5, characterized in that: A first limiting part is provided circumferentially between the driven gear and the lead screw. Before the lead screw abuts against the driven gear, the first limiting part abuts against the signal block.

10. The motorcycle ECVT actuator according to claim 9, characterized in that: The driven gear has several arc-shaped grooves circumferentially on the side near the lead screw, and the parts between the arc-shaped grooves protrude relative to each other to form a first limiting part; the signal block has a second limiting part on the side near the driven gear, and the rotation trajectory of the second limiting part is projected within the range of the arc-shaped grooves and the first limiting part. Before the lead screw is pressed against the driven gear, the first limiting part and the second limiting part abut against each other.

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