CN213235879U

CN213235879U - Replaceable drum brake clearance automatic compensation device

Info

Publication number: CN213235879U
Application number: CN202020252681.1U
Authority: CN
Inventors: 邓季石
Original assignee: Minghong Industry Co ltd
Current assignee: Minghong Industry Co ltd
Priority date: 2019-12-27
Filing date: 2020-03-04
Publication date: 2021-05-18
Anticipated expiration: 2030-03-04
Also published as: TWM593485U

Abstract

The utility model provides a removable formula drum brakes clearance automatic compensation arrangement, include: swing arm and compensation group, the one end of swing arm is pin joint portion, and the other end is equipped with the curb plate for one side of group's portion of connecting and group's portion of connecting, be equipped with the pivot between group's portion of connecting and the curb plate, the tip that pin joint portion was kept away from to the curb plate is equipped with the compression leg, be equipped with screw A and threaded connection in the pivot and have the screw rod, compensation group is including the adjustment section of thick bamboo that has the internal thread hole and adjustment section of thick bamboo and screw rod threaded connection, the one end butt pivot. The utility model provides a pair of removable formula drum brakes clearance automatic compensation arrangement, the device can be dismantled through the mounting, makes the unable interlock of interlock board and interlock wheel, can directly rotate to reset to initial position to an adjustment section of thick bamboo, and only need to change the lining piece can, can avoid the waste of resource and have the efficiency that reduces consumer's burden.

Description

Replaceable drum brake clearance automatic compensation device

Technical Field

The utility model relates to a brake equipment, in particular to removable formula drum brake clearance automatic compensation arrangement.

Background

The existing drum brake has good self-braking function, the diameter of the brake drum of the drum brake can be much smaller than that of the brake disc of the disc brake under the condition of generating the same braking torque, and the drum brake has the advantages of low part cost, convenient maintenance and the like, so that the drum brake is widely applied to the braking systems of automobiles, locomotives, bicycles or other various vehicles. It is worth noting that the drum brake is easy to wear the brake lining of the brake shoe with the increase of the braking frequency, so that the distance between the brake lining and the brake drum is enlarged, and the brake cable for driving the brake lining must be pulled for a longer distance to make the brake lining of the brake shoe contact and rub the brake drum, in other words, the stroke of the user pulling the brake pull rod or stepping the brake pedal must be prolonged, so as to obtain the same braking force as before the brake lining of the brake shoe is not worn.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned not enough among the prior art, the utility model provides a clearance automatic compensation arrangement is braked to removable formula drum can press brake handle to interval between the brake shoe of automatic adjustment brake shoe and the brake drum, with the wearing and tearing of compensation brake shoe.

In order to achieve the above object, the utility model adopts the following technical scheme:

a replaceable drum brake gap automatic compensation device comprises: the swing arm and the compensation group, one end of the swing arm is a pin joint part, the other end of the swing arm is an assembly part and one side of the assembly part is provided with a side plate, a rotating shaft is arranged between the assembly part and the side plate, the end part of the side plate, which is far away from the pin joint part, is provided with a pressure column, the rotating shaft is provided with a screw hole A and a screw rod in threaded connection, the compensation group comprises an adjustment cylinder with an internal thread hole, the adjustment cylinder is in threaded connection with the screw rod, one end of the adjustment cylinder is abutted against the rotating shaft, the outer side of the adjustment cylinder is sleeved with a bearing sleeve with a shaft hole, an one-way bearing is arranged between the adjustment cylinder and the bearing sleeve, the outer wall of the bearing sleeve is provided with a linkage plate and a linkage wheel, the linkage plate is provided with a guide hole, the guide hole is used for the pressure column to stretch into, the screw rod is close to the end of the rotating shaft and sleeved with a butt-joint piece.

As an improvement, the adjusting cylinder is in a step shape, a ring groove is arranged on the outer side of the small diameter, and a ring body is sleeved on the outer side of the ring groove.

As an improvement, the abutting part is provided with a ring groove, and the ring body is arranged between the ring groove and the ring groove.

As an improvement, one end of the abutting piece is an abutting part, one end face of the adjusting cylinder abuts against the abutting part, and a shell cylinder is arranged on the outer peripheral face of the abutting piece.

As an improvement, the shell is provided with a flange which protrudes towards the inner diameter direction and is embedded in a caulking groove arranged on the outer wall of the bearing sleeve.

As an improvement, the outer peripheral wall of the bearing sleeve is in a step shape, the large-diameter end is a blocking part, the small-diameter part of the bearing sleeve is sleeved with the linkage plate and the linkage wheel, the linkage plate is sleeved on the small-diameter part of the bearing sleeve through a through hole, one side of the linkage plate is abutted against the blocking part, and the linkage wheel is arranged on the outer side of the bearing sleeve through a hole.

As an improvement, the linkage plate is provided with a screw hole B, one side of the linkage wheel is provided with a through hole, and the fixing piece penetrates through the through hole and is screwed in the screw hole B.

The utility model has the advantages that:

the device can ensure that the distance between the brake lining and the brake drum is formed at a preset level by pressing the brake handle, so that the vehicle can keep the optimal braking effect. In addition, when the brake shoe of the brake shoe is seriously worn, and the distance between the brake shoe and the brake drum cannot be adjusted to the same level as that before the brake shoe is worn, the device can be detached through the fixing part, so that the linkage plate and the linkage wheel cannot be linked, the adjusting cylinder can be directly rotated and reset to the initial position, and only the brake shoe needs to be replaced, thereby avoiding the waste of resources and having the effect of reducing the burden of consumers.

Drawings

Fig. 1 is an exploded perspective view of a first preferred embodiment of the present invention.

Fig. 2 is a perspective view of the first preferred embodiment of the present invention.

Fig. 3 is a front view of the first preferred embodiment of the present invention.

Fig. 4 is a left side view of fig. 3.

Fig. 5 is a sectional view taken along line a-a of fig. 4.

Fig. 6 is a diagram of the adjustment situation shown in fig. 5.

Reference symbol comparison table:

1-swing arm, 11-pivoting part, 12-assembling part, 13-side plate, 131-compression column, 14-rotating shaft, 141-screw hole A, 15-screw rod, 2-compensation group, 21-adjusting cylinder, 211-internal thread, 212-ring groove, 22-bearing sleeve, 221-shaft hole, 222-one-way bearing, 223-stopping part, 224-caulking groove, 23-linkage plate, 231-perforation, 232-guide hole, 233-screw hole B, 24-linkage wheel, 241-hole, 242-through hole, 25-fixing part, 26-abutting part, 261-abutting end, 262-abutting part, 263-ring body, 264-ring groove, 27-shell cylinder and 271-flange.

Detailed Description

The following describes the present invention with reference to the accompanying drawings. In which like parts are designated by like reference numerals. It should be noted that the terms "front," "back," "left," "right," "upper" and "lower" used in the following description refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

In order to make the content of the present invention more clearly understood, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the attached drawings in the embodiment of the present invention.

As shown in fig. 1-6, the end of the swing arm 1 is a pivot portion 11, the pivot portion 11 can be combined with a shaft post (not shown) of a conventional drum brake device of a vehicle, so that when a brake handle of the vehicle is pressed, the swing arm 1 can be pulled by a brake cable to rotate, and the swing arm 1 can drive a brake shoe of the drum brake device to move, so as to reduce the rotation speed of the wheel or stop the wheel from rotating, and when the brake handle of the vehicle is stopped being pressed, the shaft post of the drum brake device can be reset to rotate, and the swing arm 1 is reset to an accurate position, so that the distance between the brake shoe of the drum brake device and the brake drum is formed at a predetermined distance. This is the basic operation principle of a drum brake device for a vehicle.

The other end of the swing arm 1 is provided with an assembling portion 12, the assembling portion 12 and a side plate 13 can support the rotating shaft 14 to be positioned and pivoted together, the side plate 13 can extend out from the swing arm 1, and the side plate 13 is provided with a protruding pressing column 131. The rotating shaft 14 is provided with a screw hole A141 for screwing the screw rod 15, and the other end of the screw rod 15 is connected with a brake cable.

The compensation set 2 is provided with an adjusting cylinder 21, the adjusting cylinder 21 has an internal thread 211 capable of being screwed on one end of the screw 15, one end surface of the adjusting cylinder 21 abuts against the abutting part 262 of the rotating shaft 14 or the abutting part 26, the adjusting cylinder 21 is accommodated in the shaft hole 221 of the bearing sleeve 22, and a one-way bearing 222 is arranged between the adjusting cylinder 21 and the bearing sleeve 22, so that the bearing sleeve 22 can only rotate in one direction relative to the adjusting cylinder 21, for example, the outer wall of the one-way bearing 222 is combined with the shaft hole 221 of the bearing sleeve 22, and the inner wall of the inner ring of the one-way bearing 222 is combined with the outer wall of the adjusting cylinder 21, so that the bearing sleeve 22 can only rotate in one direction relative to the adjusting cylinder 21 in a loose.

The outer peripheral wall of the bearing sleeve 22 preferably forms a stop portion 223 by utilizing the difference between the large diameter and the small diameter, the small diameter portion can be used for the linking plate 23 and the linking wheel 24 to be sequentially sleeved, the linking plate 23 can be sleeved on the small diameter portion of the bearing sleeve 22 through the through hole 231, the side of the linking plate 23 can abut against the stop portion 223, the linking wheel 24 is combined with the outer peripheral wall of the bearing sleeve 22 through the hole 241, so that the linking plate 23 is limited between the stop portion 223 and the linking wheel 24 and can rotate relative to the bearing sleeve 22, and the hole 241 of the linking wheel 24 and the bearing sleeve 22 can be combined in a tight fit manner, so that the linking wheel 24 and the bearing sleeve 22 synchronously rotate. The linkage plate 23 further has a guide hole 232, the guide hole 232 is for the pressing column 131 of the side plate 13 to extend into, so that the pivot of the swing arm 1 can press the linkage plate 23 to pivot through the pressing column 131. The linkage plate 23 and the linkage wheel 24 can be combined by the fixing member 25, so that the linkage plate 23 and the linkage wheel 24 can synchronously rotate, the linkage plate 23 has a screw hole B233, the linkage wheel 24 has a through hole 242, the fixing member 25 can be a screw member, so that the fixing member 25 can pass through the through hole 242 to be screwed with the screw hole B233, so that the linkage plate 23 and the linkage wheel 24 can synchronously rotate, and the fixing member 25 can be disassembled, so that the linkage wheel 24 can be separated from the linkage plate 23, and the linkage wheel 24 and the bearing sleeve 22 can be rotated, thereby adjusting the rotation of the adjusting cylinder 21.

In order to make the end surface of the adjusting cylinder 21 and the rotating shaft 14 have a stable effect, the adjusting cylinder further comprises an abutting member 26, an end of the abutting member 26 has an abutting end 261, the abutting end 261 can be matched with the outer peripheral surface of the rotating shaft 14, so that the abutting member 26 can be stably abutted against the rotating shaft 14 through the abutting end 261, and the other end of the abutting member 26 has an abutting portion 262, so that the end surface of the adjusting cylinder 21 can be abutted against the abutting portion 262. The adjusting cylinder 21 may further have a ring groove 212 on the outer peripheral surface thereof, the ring groove 212 may be used for the elastically deformable ring body 263 to be sleeved thereon, and the abutting member 26 may further have a ring groove 264, such that the ring body 263 may be interposed between the ring groove 212 and the ring groove 264, and the abutting member 26 and the adjusting cylinder 21 may have a better combination effect. In addition, the outer peripheral surface of the abutting member 26 may further have a casing 27, the casing 27 may have a flange 271 protruding toward the inner diameter direction, and the flange 271 may be fitted into the insertion groove 224 of the outer peripheral wall of the bearing housing 22, so that the compensating group 2 has better waterproof and antifouling effects.

The end of the brake cable is connected with one end of the screw rod 15, and the other end of the brake cable is connected with a brake handle of the vehicle. When the brake handle is pressed, the brake cable pulls the swing arm 1, and the brake cable screw 15 forms a non-linear included angle, so that when the brake cable pulls the swing arm 1, the screw 15 rotates at a small angle (6-8 degrees) along the center of the rotating shaft 14, and the screw 15 and the brake cable are approximately in a straight line; and the swing arm 1 is rotated counterclockwise (in the drawing) in accordance with the center of the shaft column coupled to the drum brake device of the vehicle.

When the screw 15 rotates at a small angle with respect to the center of the rotating shaft 14, the pressing rod 131 presses the linking plate 23 to pivot the linking plate 23 clockwise (as shown in fig. 4) with respect to the center of the pivoted through hole 231, the linking plate 23 and the linking wheel 24 are combined by the fixing member 25 to allow the linking wheel 24 to rotate synchronously, the linking wheel 24 is combined with the outer circumferential wall of the bearing sleeve 22, and the outer ring of the one-way bearing 222 cannot rotate relative to the inner ring, so that the linking wheel 24 can drive the adjusting cylinder 21 to rotate synchronously via the one-way bearing 222, and the adjusting cylinder 21 screwed on the screw 15 can move axially relative to the screw 15 in the direction of the brake line W, thereby achieving a predetermined spacing between the brake pad and the brake drum of the brake pad and maintaining the drum brake device at an optimal braking effect.

Referring to fig. 6, when the adjustment cylinder 21 moves to the end of the screw 15 after a long time use and cannot move axially towards the brake cable, at this time, the operator can detach the fixing member 25 to disengage the coupling plate 23 and the coupling wheel 24, so that the adjustment cylinder 21 can be directly rotated and reset to the initial position, and only the brake pads of the drum brake device need to be replaced, and when the replacement is completed, the operator can use the fixing member 25 to combine the coupling plate 23 and the coupling wheel 24 to couple the coupling plate 23 and the coupling wheel 24, so that the brake pads of the drum brake device can be replaced, and the distance between the brake pads and the brake drum of the drum brake device is at the predetermined level.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the present invention, and all modifications, equivalents, improvements and the like that are made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A replaceable drum brake clearance automatic compensation device is characterized by comprising: swing arm (1) and compensation group (2), the one end of swing arm (1) is pin joint portion (11), and the other end is equipped with curb plate (13) for one side of group's connection portion (12) and group's connection portion (12), be equipped with pivot (14) between group's connection portion (12) and curb plate (13), the tip that pin joint portion (11) were kept away from in curb plate (13) is equipped with compression leg (131), be equipped with screw A (141) and threaded connection screw rod (15) in pivot (14), compensation group (2) are equipped with bearing housing (22) that have shaft hole (221) including adjusting section of thick bamboo (21) and screw rod (15) threaded connection, the one end butt pivot (14) of adjusting section of thick bamboo (21), the outside cover of adjusting section of thick bamboo (21) is equipped with bearing housing (22) that have shaft hole (221), be equipped with one-way bearing (222) between adjusting section of thick bamboo (21) and bearing housing (22), the outer wall of bearing housing (22) is equipped with 23) The brake cable is provided with a guide hole (232), the guide hole (232) and a pressure supply column (131) are arranged in a stretching mode, the linkage plate (23) and the linkage wheel (24) are connected through a fixing piece (25) and rotate synchronously, one end of the screw rod (15) is fixedly provided with a brake cable, the end portion, far away from the screw rod (15), of the brake cable extends out of the screw rod (15) to be arranged, and the end portion, close to the rotating shaft (14), of the screw rod (15) is sleeved with a butt-joint piece (26).

2. The replaceable drum brake clearance automatic compensating device as claimed in claim 1, wherein: the adjusting cylinder (21) is in a step shape, a ring groove (212) is arranged on the outer side of the small diameter, and a ring body (263) is sleeved on the outer side of the ring groove (212).

3. The replaceable drum brake clearance automatic compensating device as claimed in claim 2, wherein: the abutting part (26) is provided with an annular groove (264), and the annular body (263) is arranged between the annular groove (212) and the annular groove (264).

4. The replaceable drum brake clearance automatic compensating device as claimed in claim 3, wherein: one end of the abutting piece (26) is an abutting part (262), one end face of the adjusting cylinder (21) abuts against the abutting part (262), and the outer peripheral surface of the abutting piece (26) is provided with a shell cylinder (27).

5. The replaceable drum brake clearance automatic compensating device as claimed in claim 4, wherein: the shell (27) is provided with a flange (271) protruding towards the inner diameter direction, and the flange (271) is embedded in an embedding groove (224) formed in the outer wall of the bearing sleeve (22).

6. The replaceable drum brake clearance automatic compensating device as claimed in claim 1 or 5, wherein: the outer peripheral wall of the bearing sleeve (22) is in a step shape, the large-diameter end is a stopping portion (223), the small-diameter portion of the bearing sleeve (22) is used for sleeving the linkage plate (23) and the linkage wheel (24), the linkage plate (23) is sleeved on the small-diameter portion of the bearing sleeve (22) through a through hole (231) which penetrates through the linkage plate, one side of the linkage plate (23) abuts against the stopping portion (223), and the linkage wheel (24) is arranged on the outer side of the bearing sleeve (22) through a hole (241).

7. The replaceable drum brake clearance automatic compensating device as claimed in claim 6, wherein: the linkage plate (23) is provided with a screw hole B (233), one side of the linkage wheel (24) is provided with a through hole (242), and the fixing piece (25) penetrates through the through hole (242) and is screwed in the screw hole B (233).