CN218625181U

CN218625181U - Engine brake clutch

Info

Publication number: CN218625181U
Application number: CN202223251189.0U
Authority: CN
Inventors: 伍怀秋
Original assignee: Chongqing Changxing Industrial Co ltd
Current assignee: Chongqing Changxing Industrial Co ltd
Priority date: 2022-12-02
Filing date: 2022-12-02
Publication date: 2023-03-14
Anticipated expiration: 2032-12-02

Abstract

The utility model discloses an engine brake clutch, which comprises a driving shaft, a movable wheel, a fixed wheel fixed at one end of the driving shaft, and a shaft sleeve sleeved on the driving shaft through a bidirectional needle bearing, wherein the left end of the shaft sleeve faces the fixed wheel, and the movable wheel is rotationally matched with the outer side surface of the shaft sleeve through a bushing; the device also comprises a T-shaped sleeve sleeved on the driving shaft through a one-way needle bearing and a sliding cam ring arranged between the end face cam ring and the inner side end face of the moving wheel. The utility model discloses engine braking clutch, it can utilize axle sleeve, slip cam ring, T shape cover and one-way bearing to realize anti-dragging engine and brakies the vehicle, can not appear abnormal sound in braking process moreover to can not cause the drive belt to press from both sides the problem of hindering in the braking process, the braking torque of transmission is big, and braking effect is good.

Description

Engine brake clutch

Technical Field

The utility model relates to a transmission technical field, concretely relates to clutch.

Background

In the prior art, as shown in the attached figure 1 of the specification, a driving shaft is provided with a one-way clutch 1, when an engine idles, a cam pin 2 on the driving shaft is pushed by an internal spring to lean against the inside of the one-way clutch 1 to slide, a transmission belt is sleeved on the one-way clutch and is separated from a fixed wheel 3 and a movable wheel 4 on two sides, and power output by the engine cannot be transmitted by the transmission belt, so that the power is cut off in an idling state. When the rotating speed of a driven wheel of the continuously variable transmission is greater than that of a driving wheel, the rotating speed of the driving isolator driven by the transmission belt is greater than that of the driving shaft, at the moment, the cam pin 2 on the driving shaft is blocked on a spiral step surface in the isolator, and the cam pin 2 can drive the isolator to axially move when moving on the spiral step surface in the isolator, so that the transmission belt is clamped by the inclined ring part 101 at the end part of the isolator shaft and the moving wheel 4, power is reversely transmitted to the engine, and the braking of the engine by utilizing reverse dragging is realized. However, when the existing stepless speed change clutch with the braking function brakes, the cam pin 2 collides with the spiral step surface in the isolator to give out 'possible, correct and correct' abnormal sound when the engine is reversely dragged, which can affect the mood of drivers; moreover, because the contact area between the inclined plane ring part 101 and the transmission belt is smaller, the transmitted braking force is smaller, and the braking effect is poorer; meanwhile, the contact area between the inclined ring part 101 and the transmission belt is small, and the problem of local clamping damage of the transmission belt is easily caused.

SUMMERY OF THE UTILITY MODEL

In view of the above, an object of the present invention is to provide an engine brake clutch to solve the technical problems that the conventional stepless speed change clutch will generate abnormal sound when performing the braking function, the transmission belt is easy to be partially clamped, the braking effect is poor, and the like.

The utility model discloses engine brake clutch, including driving shaft, removal wheel and the fixed pulley of fixing in driving shaft one end, still include the axle sleeve of cover on the driving shaft through two-way bearing, the left end of axle sleeve is towards the fixed pulley, the removal wheel is through the lateral surface normal running fit of bush and axle sleeve;

the engine braking clutch also comprises a T-shaped sleeve sleeved on the driving shaft through a one-way needle bearing, wherein the T-shaped sleeve comprises a sleeve body and an end face cam ring connected to the right end of the sleeve body;

the engine braking clutch further comprises a sliding cam ring arranged between the end face cam ring and the inner side end face of the moving wheel, an axial groove is formed in the right end of the shaft sleeve, a clamping block in sliding fit with the axial groove in the right end of the shaft sleeve is arranged on the sliding cam ring, and spiral faces in sliding fit with each other are arranged on the end face cam ring and the sliding cam ring.

Furthermore, the engine brake clutch further comprises a roller seat, rollers uniformly arranged on the roller seat along the circumferential direction, a rocker arm hinged on the moving wheel and leaning against the outer circle surface of the roller, a sliding seat sleeved on the driving shaft and in sliding fit with the driving shaft, and a spiral spring with one end abutting against the roller seat and the other end abutting against the sliding seat, wherein the moving wheel is connected with the sliding seat through a screw.

The utility model has the advantages that:

the utility model discloses engine braking clutch, it can utilize axle sleeve, slip cam ring, T shape cover and one-way bearing to realize anti-engine of dragging to brake the vehicle, can not appear abnormal sound in braking process moreover to can not cause the drive belt to press from both sides the problem of hindering in the braking process, the braking torque of transmission is big, and braking effect is good.

Drawings

Fig. 1 is a schematic view of a conventional engine brake clutch.

FIG. 2 is a schematic diagram of a brake clutch of the engine according to the embodiment.

Fig. 3 is a schematic perspective view of the shaft sleeve.

Fig. 4 is a schematic perspective view of the T-shaped sleeve.

Fig. 5 is a perspective view of the slide cam ring.

Fig. 6 is a perspective view of the sleeve mounted on the drive shaft.

Figure 7 is a perspective view of the sliding cam ring mounted on the bushing.

FIG. 8 is a perspective view of the T-shaped sleeve in cooperation with the sliding cam ring.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and examples.

As shown in fig. 2, the engine brake clutch in this embodiment includes a driving shaft 1, a movable wheel 2, a fixed wheel 3 fixed at one end of the driving shaft, and a sleeve 5 sleeved on the driving shaft through a bidirectional needle bearing 4, wherein the left end of the sleeve faces the fixed wheel, and the movable wheel is rotatably engaged with the outer side surface of the sleeve through a bushing 6. In the specific implementation, one or two bidirectional needle bearings can be used.

The engine braking clutch also comprises a T-shaped sleeve 7 which is sleeved on the driving shaft through a one-way needle bearing 17, wherein the T-shaped sleeve comprises a sleeve body 71 and an end face cam ring 72 connected to the right end of the sleeve body.

The engine brake clutch further comprises a sliding cam ring 8 arranged between the end face cam ring and the inner end face of the moving wheel, an axial groove 51 is formed in the right end of the shaft sleeve, a clamping block 81 in sliding fit with the axial groove in the right end of the shaft sleeve is arranged on the sliding cam ring, and spiral faces 9 in sliding fit with each other are arranged on the end face cam ring and the sliding cam ring.

The engine brake clutch in the embodiment further includes a roller seat 10, rollers 11 disposed on the roller seat along the circumferential direction, a rocker arm 12 hinged to the moving wheel and leaning against the outer circumferential surface of the roller, a sliding seat 13 sleeved on the driving shaft and sliding-engaged with the driving shaft, and a coil spring 14 having one end abutting against the roller seat and the other end abutting against the sliding seat, wherein the moving wheel and the sliding seat are connected through a screw 15. In practical implementation, check rings can be arranged between the left end face of the shaft sleeve and the fixed wheel 1, between the inner end face of the moving wheel and the sliding cam ring 8, and between the end face cam ring 72 and the roller seat 10, so that the effects of adjusting assembly intermittence, improving contact surface wear resistance and the like can be achieved.

In the embodiment of the engine brake clutch, when the engine drives the driving shaft to rotate in an idle speed state, the driving shaft drives the moving wheel to rotate through the roller seat, and at the moment, because the rotating speed of the moving wheel is low, the centrifugal force generated by the rotation of the rocker arm is not enough to push the moving wheel to contact with the transmission belt 16; therefore, in the idling state, the power of the engine cannot be output by the clutch, and the clutch is in a power-cut state. When the rotating speed of the engine rises, the centrifugal force generated by the rocker arm can push the moving wheel to move axially to clamp the transmission belt, and at the moment, the power output by the engine can be transmitted to the transmission belt through the driving shaft, the fixed wheel and the moving wheel, so that the power output is realized.

The principle of the engine braking clutch for braking by using the reverse-dragging engine is as follows:

when the rotating speed of the shaft sleeve 5, the sliding cam ring 8 and the T-shaped sleeve 7 is higher than the rotating speed of the driving shaft under the driving of the transmission belt, the one-way needle bearing 17 is in a reverse locking state, and the T-shaped sleeve 7 drives the driving shaft to rotate reversely through the one-way needle bearing 17, so that the engine is braked by utilizing reverse dragging.

And in the braking process of the back-dragging engine, when the sleeve 5 rotates through the sliding cam ring 8, the end face cam ring and the sliding cam ring can also slide relatively along the spiral surface, and because the axial position of the end face cam ring 72 is fixed, the sliding cam ring can move axially in the sliding process along the spiral surface, the axial movement of the sliding cam ring can push the moving wheel to move towards the transmission belt, so that the transmission belt is clamped tightly, the transmission belt can also transmit power to the driving shaft through the driving wheel and the moving wheel, the strength of the back-dragging engine is increased, and the braking effect is further improved.

And the utility model discloses engine brake clutch can not appear abnormal sound at braking in-process, and the area of contact of drive belt and action wheel and removal wheel is big among the braking process, and the braking torque of transmission is big, and braking effect is good, and the problem that the drive belt part is pressed from both sides and is hindered can not appear.

Finally, it is noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting, and although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present invention can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should be covered by the scope of the claims of the present invention.

Claims

1. A kind of engine brake clutch, including driving shaft, moving wheel and fixed wheel fixed on one end of driving shaft, characterized by that: the movable wheel is in running fit with the outer side face of the shaft sleeve through a bush;

2. The engine braking clutch of claim 1, wherein: the device comprises a driving shaft, a driving wheel seat, a roller, a rocker arm, a sliding seat, a spiral spring and a screw, wherein the roller is uniformly arranged on the roller seat along the circumferential direction, the rocker arm is hinged on the moving wheel and leans against the outer circular surface of the roller, the sliding seat is sleeved on the driving shaft and is in sliding fit with the driving shaft, one end of the spiral spring is propped against the roller seat, the other end of the spiral spring is propped against the sliding seat, and the moving wheel is connected with the sliding seat through the screw.