CN213711692U

CN213711692U - Stepless speed change clutch

Info

Publication number: CN213711692U
Application number: CN202022385573.4U
Authority: CN
Inventors: 刘凯; 李佳明
Original assignee: Zhejiang Maoquan Machinery Co ltd
Current assignee: Zhejiang Maoquan Machinery Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-07-16
Anticipated expiration: 2030-10-23

Abstract

The utility model relates to a stepless speed change clutch, including driving shaft and along fixed dustcoat, sliding tray, the fixed disk that the driving shaft axial set gradually, fixed dustcoat, fixed disk all link firmly with the driving shaft. The opposite surfaces of the sliding disc and the fixed outer cover are respectively fixed with a roller support, the roller support is provided with a plurality of inclined guide plates, the inclined guide plates of the two roller supports are inclined up and down relatively to form a roller raceway, and rollers are arranged in the roller raceway in a rolling manner; the outer end of an inclined guide plate of the roller support on the sliding disc is convexly provided with a sliding piece, the sliding piece protrudes out of the outer edge of the sliding disc, the inner wall of the fixed outer cover is respectively provided with an axially extending sliding groove corresponding to each sliding piece, and the sliding piece is embedded in the sliding groove to form axial sliding fit. The roller only realizes speed change in the structure, and torque transmission is realized by utilizing sliding contact of the sliding piece and the sliding groove, so that the clutch works more stably and smoothly, is not blocked and has low failure rate.

Description

Stepless speed change clutch

Technical Field

The utility model relates to a clutch technical field especially relates to a stepless speed change clutch.

Background

The stepless speed change device comprises a driving clutch, a driven clutch and a transmission belt, wherein the driving clutch is connected with the engine shaft, and when the engine shaft rotates, the driving clutch drives the driven clutch through the transmission belt to realize power output. The active clutch in the prior art mainly comprises a driving shaft, a fixed outer cover, a sliding disc and a fixed disc, wherein a roller path and a roller structure are designed between the fixed disc and the sliding disc. When the vehicle engine is started and oil is added, the roller moves outwards along the inclined roller path due to the rotating centrifugal force, pushes the sliding disc to move towards the fixed disc, clamps the transmission belt between the sliding disc and the fixed disc and drives the driven clutch to operate. And the ball automatically returns to one side of the raceway close to the driving shaft until the vehicle is flamed out. However, in the above-mentioned technology, the roller also has a function of transmitting torque while realizing speed change by centrifugal flinging, which is likely to cause failure such as unsmooth speed change and seizure, and the ball is severely worn and has a short service life, which may affect the driving safety and reliability in severe cases.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that overcome above-mentioned problem, and provided a stepless speed change clutch that variable speed is steady fast, not jamming, the fault rate is low, the reliability is higher.

The technical scheme of the utility model is that:

a stepless speed change clutch, including driving shaft and along fixed dustcoat, sliding tray, the fixed disk that the driving shaft axial set gradually, fixed dustcoat, fixed disk all link firmly its characterized in that with the driving shaft: the opposite surfaces of the sliding disc and the fixed outer cover are respectively fixed with a roller support, the roller support is provided with a plurality of inclined guide plates, the inclined guide plates of the two roller supports are inclined up and down relatively to form a roller raceway, and rollers are arranged in the roller raceway in a rolling manner; the outer end of an inclined guide plate of the roller support on the sliding disc is convexly provided with a sliding piece, the sliding piece protrudes out of the outer edge of the sliding disc, the inner wall of the fixed outer cover is respectively provided with an axially extending sliding groove corresponding to each sliding piece, and the sliding piece is embedded in the sliding groove to form axial sliding fit.

In the structure, the roller rolls outwards along the roller raceway under the action of centrifugal force to push the sliding disc to slide towards one side of the fixed disc, the roller only changes speed in the process and does not transfer torque, and the transmission of the torque of the engine is realized by utilizing the axial sliding contact of the sliding piece along the sliding groove, so that the clutch works more stably and smoothly.

Further, stepless speed change clutch in, be connected with the extension spring between two liang of adjacent rollers for each roller of synchronous pulling removes, the atress is even and can automatic re-setting.

Further, stepless speed change clutch in, the protruding connecting cylinder that is equipped with in the middle of the sliding plate, the roller support suit is on the connecting cylinder, and the driving shaft runs through in the connecting cylinder and still supports between the two to press and be connected with the spring. The roller is always supported between the upper inclined guide plate and the lower inclined guide plate through the elasticity of the spring, and smooth work is guaranteed.

Further, among the stepless speed change clutch, the slope baffle both sides are turned over respectively and are rolled over the curb plate that blocks that is used for blockking that the roller rolls off, improve operational reliability.

Further, in the stepless speed change clutch of the present invention, the sliding member is sleeved with a bushing to reduce sliding wear between the sliding member and the sliding groove.

Further, in the stepless speed change clutch of the present invention, the slider is integrally formed with the inclined guide plate.

Further, stepless speed change clutch in, a stall hole has been seted up in the middle of the fixed dustcoat, be formed with on the driving shaft with the portion of splining that the stall hole is anastomotic, the portion of splining runs through in the stall hole and both stall the cooperation and pass through nut fixed connection.

The utility model has the advantages that: the structure mutually independent the speed changing and torque transmitting structures, and adds the slider and the chute structure to replace the roller to transmit the torque of the engine, so that the roller only realizes the function of external throwing and speed changing under the action of centrifugal force, does not bear the acting force of torque transmission, is not easy to generate the clamping stagnation condition, obviously improves the working smoothness of the clutch, and has extremely low failure rate; meanwhile, the abrasion of the roller is slowed down to a certain degree, and the service life is prolonged.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic diagram of the explosion structure of the present invention.

Detailed Description

The present invention will now be further described with reference to the accompanying drawings:

referring to fig. 1 and 2, the stepless speed change clutch of this embodiment includes a driving shaft 1 and a fixed outer cover 2, a sliding disk 3 and a fixed disk 4 sequentially arranged along the axial direction of the driving shaft 1, wherein the fixed outer cover 2 and the fixed disk 4 are fixedly connected with the driving shaft 1. The roller support 5 is fixed on the opposite surfaces of the sliding disc 3 and the fixed outer cover 2, the roller support 5 is provided with a plurality of inclined guide plates 5a, the inclined guide plates 5a of the two roller supports 5 are inclined up and down relatively to form a roller raceway, rollers 6 are arranged in the roller raceway in a rolling mode, and blocking side plates 5b used for blocking the rollers 6 from rolling down are respectively folded on the two sides of the inclined guide plates 5 a. Wherein, a slide piece 5c is convexly arranged at the outer end of the inclined guide plate 5a of the roller bracket 5 positioned on the sliding disk 3, and the slide piece 5c is integrally formed with the inclined guide plate 5 a. The sliders 5c protrude out of the outer edge of the sliding disc 3, axially extending sliding grooves 2a are respectively formed in the inner wall of the fixed outer cover 2 corresponding to the sliders 5c, and the sliders 5c are embedded in the sliding grooves 2a to form axial sliding fit.

In the embodiment, a tension spring 7 is connected between every two adjacent rollers 6. The middle of the sliding disc 3 is convexly provided with a connecting cylinder 8, the roller support 5 is sleeved on the connecting cylinder 8, and the driving shaft 1 penetrates through the connecting cylinder 8 and is connected with a spring 9 in a pressing mode. Each roller 6 can be synchronously pulled by the tension spring 7 to be uniformly stressed and synchronously thrown outwards, and meanwhile, the roller can be automatically reset by the tension spring 7 when the rotating speed is reduced; the sliding disk 3 is pressed upwards by the spring 9, thereby ensuring that the rollers 6 simultaneously abut against the inclined guide plates 5a on the upper and lower sides.

In order to improve the connection stability and firmness of the fixed outer cover 2 and the driving shaft 1, a rotation stopping hole 2b is formed in the middle of the fixed outer cover 2, a rotation stopping portion 1a matched with the rotation stopping hole 2b is formed on the driving shaft 1, the rotation stopping portion 1a penetrates through the rotation stopping hole 2b, and the rotation stopping portion are matched and fixedly connected through nuts.

In addition, in order to further reduce the sliding abrasion between the sliding piece 5c and the sliding groove 2a and have good heat dissipation performance, the sliding piece 5c is sleeved with a bushing 10.

After the engine is started, when the rotating speed reaches a certain speed and centrifugal force, the roller 6 can roll outwards under the action of the centrifugal force, because two sides of the roller 6 are abutted between the upper inclined guide plate 5a and the lower inclined guide plate 5a, the roller can roll along the gradient of a roller path between the two inclined guide plates 5a, the sliding disc 3 is pushed to be close to the fixed disc 4, so that a belt between the sliding disc 3 and the fixed disc 4 is clamped tightly, the driven clutch is driven to operate and change speed, when the rotating speed is reduced and the centrifugal force is reduced, the roller 6 is reset along the roller path under the reset acting force of the tension spring 7, and therefore conversion and clutch of different. In the process, the roller 6 only plays a role in realizing speed change, and transmits the torque of the engine through the sliding contact of the sliding piece 5c, the bush 10 and the sliding groove 2a, so that the speed change clutch is more stable and smooth, is not easy to jam, and the service life is greatly prolonged.

The specific embodiments described herein are merely illustrative of the principles of the present invention and its efficacy, and are not intended to limit the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Therefore, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical idea of the present invention shall be covered by the claims of the present invention.

Claims

1. The utility model provides a stepless speed change clutch, includes driving shaft and along fixed dustcoat, sliding disk, the fixed disk that the driving shaft axial set gradually, fixed dustcoat, fixed disk all link firmly its characterized in that with the driving shaft: the opposite surfaces of the sliding disc and the fixed outer cover are respectively fixed with a roller support, the roller support is provided with a plurality of inclined guide plates, the inclined guide plates of the two roller supports are inclined up and down relatively to form a roller raceway, and rollers are arranged in the roller raceway in a rolling manner; the outer end of an inclined guide plate of the roller support on the sliding disc is convexly provided with a sliding piece, the sliding piece protrudes out of the outer edge of the sliding disc, the inner wall of the fixed outer cover is respectively provided with an axially extending sliding groove corresponding to each sliding piece, and the sliding piece is embedded in the sliding groove to form axial sliding fit.

2. The stepless speed change clutch of claim 1, wherein: tension springs are connected between every two adjacent rollers.

3. The stepless speed change clutch of claim 1, wherein: the middle of the sliding disc is convexly provided with a connecting cylinder, the roller support is sleeved on the connecting cylinder, the driving shaft penetrates through the connecting cylinder, and a spring is connected between the driving shaft and the connecting cylinder in a pressing mode.

4. The stepless speed change clutch of claim 1, wherein: and blocking side plates for blocking the rollers from rolling off are respectively turned on two sides of the inclined guide plate.

5. The stepless speed change clutch of claim 1, wherein: and the sliding piece is sleeved with a bushing.

6. The stepless speed change clutch according to claim 1 or 5, characterized in that: the slider is integrally formed with the inclined guide plate.

7. The stepless speed change clutch of claim 1, wherein: the middle of the fixed outer cover is provided with a rotation stopping hole, a rotation stopping part matched with the rotation stopping hole is formed on the driving shaft, and the rotation stopping part penetrates through the rotation stopping hole, is matched with the rotation stopping hole in a rotation stopping way and is fixedly connected with the rotation stopping hole through a nut.