Large-torque kart clutch

Abstract

The utility model relates to a large-torque kart clutch. The large-torque kart clutch comprises a transmission shaft, a fixed disc, a sliding disc, a cover plate and a clutch cover, the clutch cover is rotatably connected with the transmission shaft in the circumferential direction, and the sliding disc is connected with the transmission shaft in an axial sliding mode. A plurality of slope grooves are formed in the sliding disc in the circumferential direction in a concave mode, the fixed disc is provided with a slope face, a roller raceway gradually shallower outwards in the radial direction is defined by the slope grooves and the slope face, and rollers are movably arranged in the roller raceway. A friction plate set is arranged between the sliding disc and the cover plate and comprises a plurality of friction plates arranged outside the sliding disc in an empty sleeving mode and steel plates arranged between every two friction plates, the steel plates are connected with the sliding disc through splines, a plurality of protruding lugs are arranged on the outer peripheries of the friction plates, and a plurality of axial sliding ways are correspondingly arranged on the clutch cover. The convex lugs are embedded in the axial slide ways to form axial sliding connection; a spring is connected between the sliding disc and the cover plate in an abutting mode. The structure is large in torque, stable in clutch and long in service life.

Description

Technical Field

[0001] The utility model belongs to the technical field of clutches, in particular to a large torque kart clutch. Background Art

[0002] The existing kart clutch generally includes a transmission shaft, a clutch plate fixed to the transmission shaft, centrifugal blocks distributed along the circumference of the clutch plate and radially slidable, tension springs connected between the two centrifugal blocks, and a clutch cover movably mounted on the transmission shaft. When the engine drives the transmission shaft to rotate to a certain speed, the centrifugal force generated will throw the centrifugal blocks away, so that the centrifugal blocks contact the clutch cover to achieve power transmission; when the engine speed slows down or stops, the tension spring will shrink the centrifugal blocks inward, and the clutch cover will be disengaged from the transmission, playing a clutch role. In the above structure, when the centrifugal blocks are rigidly combined with the centrifuge cover, large noise and vibration are generated, and due to the small contact area and relatively weak bonding force, they are prone to slipping and high temperature when the transmitted torque is large, thus causing the clutch to fail. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the above problems and provide a large torque kart clutch, which has the advantages of large transmission torque, stable clutch, not easy to slip, long service life, etc.

[0004] The technical solution of the utility model is:

[0005] The camshaft is connected to the transmission shaft in an axial direction in sequence, wherein the clutch cover is rotatably connected to the transmission shaft in a circumferential direction, and the sliding plate is axially slidably connected to the transmission shaft; a plurality of ramp grooves are concavely arranged on the sliding plate in a circumferential direction, the fixed plate has a ramp surface, and a roller raceway that gradually becomes shallower along the radial direction outward is enclosed between the ramp groove and the ramp surface, and a roller is movably arranged in the roller raceway; a friction plate group is arranged between the sliding plate and the cover plate, and the friction plate group includes a plurality of friction plates that are hollowly sleeved outside the sliding plate and steel plates that are arranged between two friction plates, the steel plates are connected to the sliding plate by splines, the friction plates are provided with a plurality of lugs along the outer circumferential edge, and a plurality of axial slideways are correspondingly arranged on the clutch cover, and the lugs are embedded in the axial slideways to form an axial sliding connection; a spring is also at least indirectly abutted between the sliding plate and the cover plate.

[0006] In the above structure, the roller is swung outward under the action of centrifugation and cooperates with the pressure spring to realize the clutch function. The transmission torque is achieved by clamping the friction plate and the steel plate. The contact area is significantly increased, so the transmission torque is much larger, it is not easy to slip and fail, and the clutch noise is low.

[0007] Furthermore, in the high-torque kart clutch described in the utility model, the transmission shaft has a first stage, a cover plate and a flange nut are sequentially inserted into the first stage, a threaded locking fit is adopted between the flange nut and the first stage, and the cover plate is pressed onto the first stage, which has a simple structure and is easy to install.

[0008] Furthermore, in the high-torque kart clutch described in the utility model, the roller includes a cylindrical iron core and an engineering plastic layer wrapped around the outer side of the iron core, which can effectively reduce the sound during centrifugal swinging, and the noise reduction effect is obvious.

[0009] Furthermore, in the high-torque kart clutch described in the utility model, the friction plate includes an annular metal frame and friction material layers abutting against the end surfaces on both sides of the metal frame.

[0010] Furthermore, in the high-torque kart clutch described in the utility model, the transmission shaft has a second stage, the clutch cover is sleeved on the second stage with a bushing provided therebetween, and the second stage is also provided with a retaining ring for preventing the clutch cover from axially escaping.

[0011] Furthermore, in the high-torque kart clutch described in the utility model, an annular flange is formed on the cover plate extending toward the sliding disk side, a spring adjustment seat is sleeved on the annular flange, and an axial sliding connection is formed between the spring adjustment seat and the annular flange, and the spring abuts between the spring adjustment seat and the cover plate; an adjustment screw is also threadedly connected to the cover plate, and the end of the adjustment screw is axially fixed and circumferentially rotatably connected to the spring adjustment seat. By adding structures such as a spring adjustment seat and an adjustment screw to change the preload force of the spring, the situation of unstable clutch response or even failure caused by the decrease of elastic force of the spring after long-term work can be avoided, and the service life of the clutch can be extended.

[0012] Furthermore, in the high-torque kart clutch described in the utility model, the spring adjustment seat and the annular flange are connected via a spline.

[0013] Furthermore, in the high-torque kart clutch described in the utility model, an adjustment port is provided on the clutch cover corresponding to the adjustment screw, so as to facilitate rotation adjustment of the adjustment screw directly from the outside.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model utilizes the cooperation of rollers and pressure springs to realize the clutch function, and transmits torque through the clamping cooperation of friction plates and steel plates. Compared with the traditional structure in which both clutch and torque transmission rely on centrifugal blocks, the contact area of ​​torque transmission is significantly increased. Since the resistance generated by the friction plate and the steel plate is 50% greater than that of the original structure, the transmission torque is significantly improved, and the clutch is more stable. At the same time, a layer of engineering plastic is wrapped around the outer layer of the roller core, which can effectively reduce the sound when it is thrown off, the clutch noise is lower, and the service life is long.

[0016] 2. The utility model adds structures such as a spring adjustment seat and an adjustment screw on the cover plate. When the elastic force of the spring decreases after long-term work, the axial position of the spring adjustment seat can be changed by rotating the adjustment screw, thereby realizing the change of the spring preload force without replacing parts, thereby extending the service life of the clutch. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic cross-sectional view of the structure of Example 1.

[0018] Figure 2 This is a schematic diagram of the explosion structure of Example 1.

[0019] Figure 3 This is a schematic cross-sectional view of the structure of Example 2. DETAILED DESCRIPTION

[0020] The utility model is now further described in conjunction with the accompanying drawings:

[0021] Example 1

[0022] Reference Figure 1 and Figure 2 As shown, this embodiment proposes a high-torque kart clutch, including a transmission shaft 1, on which a fixed plate 2, a sliding plate 3, a cover plate 4, and a clutch cover 5 are sequentially mounted in the axial direction, the clutch cover 5 is rotatably connected to the transmission shaft 1 in the circumferential direction, and the sliding plate 3 is axially slidably connected to the transmission shaft 1. The sliding plate 3 is circumferentially concave with a plurality of ramp grooves 3a, the fixed plate 2 has a ramp surface 2a, and the ramp grooves 3a and the ramp surface 2a enclose a roller raceway that gradually becomes shallower radially outward, and a roller 6 is movably arranged in the roller raceway; the roller 6 includes a cylindrical iron core and an engineering plastic layer (not shown in the figure) wrapped around the outer side of the iron core.

[0023] A friction plate group is provided between the sliding plate 3 and the cover plate 4. The friction plate group includes a plurality of friction plates 7 which are loosely sleeved outside the sliding plate 3 and steel plates 8 which are provided between the friction plates 7. The friction plates 7 include an annular metal frame and a friction material layer which is attached to the end surfaces of both sides of the metal frame. The steel plates 8 are connected to the sliding plate 3 via a spline. The friction plates 7 are provided with a plurality of lugs 7a along the outer periphery. The clutch cover 5 is provided with a plurality of axial slideways 5a correspondingly. The lugs 7a are embedded in the axial slideways 5a to form an axial sliding connection. A spring 9 is also abutted between the sliding plate 3 and the cover plate 4.

[0024] The transmission shaft 1 has a first stage 1a and a second stage 1b. The first stage 1a is sequentially sleeved with a cover plate 4 and a flange nut 10. The flange nut 10 and the first stage 1a are thread-locked and the cover plate 4 is pressed against the first stage 1a. The clutch cover 5 is sleeved on the second stage 1b with a bushing 11 provided therebetween. The second stage 1b is also provided with a retaining ring 12 for preventing the clutch cover 5 from axially escaping.

[0025] During normal operation, when the transmission shaft 1 is connected to the engine, when the speed is low, the roller 6 is located deeper in the roller track, the friction plate 7 and the steel plate 8 are in a relaxed state, and the torque on the transmission shaft 1 is not transmitted to the clutch cover 5; as the speed increases, the roller 6 is thrown outward under the action of centrifugal force, and through the cooperation of the ramp groove 3a and the ramp surface 2a, the sliding plate 3 is pushed to move axially and press the friction plate 7 and the steel plate 8, and the torque on the transmission shaft 1 is transmitted to the clutch cover 5 through the friction plate 7 and the steel plate 8; in this process, due to the large-area contact between the friction plate 7 and the steel plate 8, the resistance generated is 50% greater than that of the traditional structure, the transmitted torque is significantly improved, the clutch is smoother, not easy to slip, the service life is longer, and the working noise is smaller.

[0026] Example 2

[0027] Reference Figure 3 This embodiment is basically the same as the embodiment 1, except that: the cover plate 4 is formed with an annular flange 4a extending toward the sliding plate 3, the annular flange 4a is sleeved with a spring adjustment seat 14, and the spring adjustment seat 14 and the annular flange 4a are axially slidably connected by splines, and the spring 9 abuts between the spring adjustment seat 14 and the cover plate 4; the cover plate 4 is also threadedly connected with an adjustment screw 13, and the end of the adjustment screw 13 is axially fixed and circumferentially rotatably connected to the spring adjustment seat 14. In order to facilitate adjustment, the clutch cover 5 is provided with an adjustment port 5b corresponding to the adjustment screw 13.

[0028] In this embodiment, the preload force of the spring 9 can be changed by changing the axial position of the spring adjustment seat 14 on the annular flange 4a. When the spring 9 is fatigued due to long-term work and the elastic force is insufficient, the adjusting screw 13 can be rotated from the adjustment port 5b to push the spring adjustment seat 14 so that the elastic force of the spring 9 can meet the normal working requirements. There is no need to disassemble and replace parts, the service life is long, and it saves time and effort.

[0029] The specific embodiments described herein are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present invention shall still be covered by the claims of the present invention.

Claims

1. A high torque kart clutch, comprising a transmission shaft, characterized in that: The transmission shaft is axially provided with a fixed plate, a sliding plate, a cover plate, and a clutch cover in sequence, the clutch cover and the transmission shaft are circumferentially rotatably connected, and the sliding plate and the transmission shaft are axially slidably connected; the sliding plate is circumferentially concavely provided with a plurality of ramp grooves, the fixed plate has a ramp surface, the ramp groove and the ramp surface are enclosed to form a roller raceway which gradually becomes shallower along the radial outward direction, and the rollers are movably arranged in the roller raceway; a friction plate group is provided between the sliding plate and the cover plate, the friction plate group includes a plurality of friction plates which are hollowly sleeved outside the sliding plate and steel plates which are arranged between two friction plates, the steel plates are connected to the sliding plate by splines, the friction plates are provided with a plurality of lugs along the outer circumference, the clutch cover is correspondingly provided with a plurality of axial slideways, the lugs are embedded in the axial slideways to form an axial sliding connection; a spring is also at least indirectly abutted between the sliding plate and the cover plate.

2. The high torque kart clutch according to claim 1, characterized in that: The transmission shaft has a first stage, a cover plate and a flange nut are sequentially inserted into the first stage, and a threaded locking fit is adopted between the flange nut and the first stage to press the cover plate onto the first stage.

3. The high torque kart clutch according to claim 1, characterized in that: The roller comprises a cylindrical iron core and an engineering plastic layer wrapped around the outer side of the iron core.

4. The high torque kart clutch according to claim 1, characterized in that: The friction plate comprises an annular metal frame and friction material layers abutting against the end surfaces on both sides of the metal frame.

5. The high torque kart clutch according to claim 1, characterized in that: The transmission shaft is provided with a second stage, the clutch cover is sleeved on the second stage with a bushing arranged therebetween, and the second stage is also provided with a retaining ring for preventing the clutch cover from axially escaping.

6. The high torque kart clutch according to claim 1, characterized in that: The cover plate is provided with an annular flange extending toward the sliding disk side, the annular flange is sleeved with a spring adjustment seat, and an axial sliding connection is formed between the spring adjustment seat and the annular flange, and the spring abuts between the spring adjustment seat and the cover plate; an adjusting screw is also threadedly connected to the cover plate, and the end of the adjusting screw is axially fixed and circumferentially rotatably connected to the spring adjustment seat.

7. The high torque kart clutch according to claim 6, characterized in that: The spring adjustment seat and the annular flange are connected via a spline.

8. The high torque kart clutch according to claim 6, characterized in that: The clutch cover is provided with an adjustment opening corresponding to the adjustment screw.

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