Horseshoe structure for lightweight drum brake

Abstract

The utility model discloses a horseshoe structure for a lightweight drum brake, which belongs to the technical field of automobile processing and comprises a brake drum, a brake block is rotatably arranged in the brake drum, a bottom plate mechanism is mounted on the brake drum and comprises a chassis, a horseshoe mounting frame is fixedly arranged on the chassis, and the brake block is mounted on the bottom plate mounting frame. A shoe shaft is fixedly arranged on the shoe mounting frame, and a shoe mechanism is rotationally arranged on the shoe shaft. According to the utility model, through the arrangement of the ball bearing, lubricating grease which is more than five times of that of the bushing can be stored between the rolling shafts, the long-mileage running can be ensured, the maintenance is not needed, and the original rolling pair is changed into a linear contact rolling pair, so that the rotation of the shoe shaft and the ball bearing is more sensitive.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of automobile processing, and specifically relates to a lightened drum brake horseshoe structure. BACKGROUND

[0002] Lightening of an automobile means reducing the curb weight of the automobile as much as possible under the premise of guaranteeing the strength and safety performance of the automobile, thereby improving the power performance of the automobile, reducing fuel consumption and lowering exhaust pollution.

[0003] With the increasing demand of customers for the quality of the whole vehicle, and some vehicle models such as express delivery vehicles and towing vehicles needing maintenance-free structures, some vehicle models are overloaded and go through mountain roads, which accelerates the service life of automobile parts, in the prior art, the horseshoe axle and the horseshoe bush are a rotary pair, and the horseshoe bush can be filled with lubricating grease, but the amount of the lubricating grease is very small, which leads to short maintenance mileage and frequent maintenance. UTILITARY MODEL

[0004] The utility model solves the technical problems in the prior art, and provides a lightened drum brake horseshoe structure.

[0005] The technical scheme adopted to solve the above technical problems is as follows: a lightened drum brake horseshoe structure, comprising a brake drum, a brake block rotatably arranged in the brake drum, a bottom plate mechanism installed on the brake drum, the bottom plate mechanism comprising a bottom disc, a horseshoe mounting frame fixedly arranged on the bottom disc, a horseshoe axle fixedly arranged on the horseshoe mounting frame, and a horseshoe mechanism rotatably arranged on the horseshoe axle.

[0006] The horseshoe mechanism comprises a horseshoe, the horseshoe is arranged in an arc-shaped sheet shape, a friction sheet is fixedly arranged on the outer arc surface of the horseshoe, a horseshoe beam is fixedly arranged on the inner arc surface of the horseshoe, a roller is rotatably arranged at one end of the horseshoe beam, the roller is arranged in correspondence with the brake block, a horseshoe bush is fixedly arranged at the other end of the horseshoe beam, a ball bearing is arranged on the inner wall of the horseshoe bush, the ball bearing comprises a bearing sleeve fixedly arranged on the inner wall of the horseshoe bush, and a roller shaft is rotatably arranged in a circumferential array on the inner wall of the bearing sleeve.

[0007] Through the technical scheme, when the two ends of the brake block push the two rollers to move, one end of the shoe beam is moved to the inner wall of the brake drum, and the other end of the shoe beam is rotatable around the shoe axle, the ball bearing is arranged on the inner wall of the shoe bushing, more than 5 times of lubricating grease can be stored between the rollers, long distance driving can be ensured without maintenance, and the original rolling pair is changed into a linear contact rolling pair, so that the shoe axle and the ball bearing rotate more sensitively.

[0008] Further, the shoe beam is provided with light weight holes.

[0009] Further, the shoe beam is provided in an arc-shaped sheet shape, the inner arc edge of the shoe beam is fixedly provided with a separation sheet, and the separation sheet is fixedly provided with a reinforcing rib between the shoe beam and the shoe.

[0010] Further, the shoe beam is provided in an arc-shaped sheet shape, the inner arc edge of the shoe beam is fixedly provided with a separation sheet, and the separation sheet is fixedly provided with a reinforcing rib between the shoe beam and the shoe.

[0011] Further, the shoe beam is provided in an arc-shaped sheet shape, the inner arc edge of the shoe beam is fixedly provided with a separation sheet, and the separation sheet is fixedly provided with a reinforcing rib between the shoe beam and the shoe.

[0012] Further, the shoe beam is provided in an arc-shaped sheet shape, the inner arc edge of the shoe beam is fixedly provided with a separation sheet, and the separation sheet is fixedly provided with a reinforcing rib between the shoe beam and the shoe.

[0013] The beneficial effects of the utility model are as follows:

[0014] (1) the ball bearing is arranged, when the two ends of the brake block push the two rollers to move, one end of the shoe beam is moved to the inner wall of the brake drum, and the other end of the shoe beam is rotatable around the shoe axle, the ball bearing is arranged on the inner wall of the shoe bushing, more than 5 times of lubricating grease can be stored between the rollers, long distance driving can be ensured without maintenance, and the original rolling pair is changed into a linear contact rolling pair, so that the shoe axle and the ball bearing rotate more sensitively.

[0015] (2) the bottom plate mechanism is arranged, the bottom plate adopts a new structure, the original double shoe axle hole is changed into a single shoe axle hole, the braking torque is slightly increased due to the improvement of the structure, but the weight of the bottom plate is effectively reduced. ACCURACY OF DRAWINGS

[0016] Figure 1 It is a perspective view of a light-weight drum brake shoe structure of the utility model;

[0017] Figure 2 It is a perspective view of a bottom plate mechanism of a light-weight drum brake shoe structure of the utility model;

[0018] Figure 3It is the perspective view of the shoe mechanism of the shoe structure of the light-weight drum brake;

[0019] Figure 4 It is the perspective view of the friction plate of the shoe structure of the light-weight drum brake;

[0020] Figure 5 It is the perspective view of the shoe piece shaft of the shoe structure of the light-weight drum brake;

[0021] Figure 6 It is the perspective view of the ball bearing of the shoe structure of the light-weight drum brake.

[0022] Reference signs: 1, brake drum; 2, bottom plate mechanism; 21, bottom disc; 22, shoe mounting frame; 23, shoe piece shaft; 3, shoe mechanism; 31, shoe piece; 32, friction plate; 33, shoe piece beam; 34, spring pin; 35, roller; 36, isolation piece; 37, light-weight hole; 38, reinforcing rib; 39, shoe bushing; 4, brake block; 5, return spring; 6, ball bearing; 61, bearing sleeve; 62, roller shaft. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further described in detail by combining with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0024] As Figures 1-6 shown, the shoe structure of the light-weight drum brake of the embodiment, including brake drum 1, brake drum 1 is rotationally arranged with brake block 4, brake drum 1 is installed with bottom plate mechanism 2, bottom plate mechanism 2 includes bottom disc 21, bottom disc 21 is fixedly provided with shoe mounting frame 22, shoe mounting frame 22 is fixedly provided with shoe piece shaft 23, shoe piece shaft 23 is rotationally arranged with shoe mechanism 3 on it;

[0025] The horseshoe mechanism 3 comprises a shoe 31 arranged in an arc-shaped sheet shape, a friction sheet 32 fixedly arranged on the outer arc surface of the shoe 31, a shoe beam 33 fixedly arranged on the inner arc surface of the shoe 31, a roller 35 rotatably arranged at one end of the shoe beam 33, the roller 35 being arranged corresponding to the brake block 4, a shoe bushing 39 fixedly arranged at the other end of the shoe beam 33, a ball bearing 6 arranged on the inner wall of the shoe bushing 39, the ball bearing 6 comprising a bearing sleeve 61 fixedly arranged on the inner wall of the shoe bushing 39, and a plurality of rollers 62 arranged in a circumferential array on the inner wall of the bearing sleeve 61. By arranging the ball bearing 6 on the inner wall of the shoe bushing 39, more than one times of lubricating grease than the bushing 5 can be stored between the rollers 62, so that a longer driving distance can be ensured without maintenance. In addition, the original rolling pair is changed to a line contact rolling pair, so that the shoe shaft 23 and the ball bearing 6 rotate more sensitively. Moreover, the original double shoe shaft hole is changed to a single shoe shaft hole, so that the braking torque is slightly increased due to the improved structure, but the weight of the bottom plate is effectively reduced.

[0026] A light hole 37 is arranged on the shoe beam 33 to further reduce the weight of the shoe beam 33.

[0027] The shoe beam 33 is arranged in an arc-shaped sheet shape, the inner arc edge of the shoe beam 33 is fixedly provided with a separation sheet 36, the separation sheet 36 and the shoe beam 33 and the shoe 31 are fixedly provided with a reinforcing rib 38, and the reinforcing rib 38 is arranged to ensure that the structure does not decrease in strength while achieving lightweight of the automobile.

[0028] The horseshoe mechanism 3 adopts a welded shoe structure, and the friction sheet 32 adopts an unequal thickness friction sheet structure. The unequal thickness friction sheet structure makes the friction material more reasonably used, prolongs the service life of the brake, and uses the punch welding technology to achieve the performance requirements with the lightest weight under the condition that the strength meets the requirements.

[0029] The chassis 21 is forged from 45 steel isothermal quenching, and the internal organization of the material is made more dense by forging and other processing methods, the crystal of the material is improved, and the strength and toughness of the material are greatly improved.

[0030] The shoe beam 33 is fixedly provided with a spring pin 34, and the spring pins 34 of the two shoe beams 33 are provided with a return spring 5.

[0031] The working principle of the embodiment is as follows: when the brake is used, the driver steps on the brake, so that the brake block 4 is driven to rotate through the brake mechanism, and the two rollers 35 are moved through the two ends of the brake block 4, so that one end of the brake beam 33 is moved to the inner wall of the brake drum 1, so that the brake shoe 31 is moved to the inner wall of the rotating brake drum 1, so that the reset spring 5 is stretched and deformed, so that the friction plate 32 fixedly arranged on the brake shoe 31 is in contact with the inner wall of the rotating brake drum 1, so that the brake drum 1 is stopped, and after the brake is released, the brake block 4 is reset, the reset spring 5 is restored due to the deformation, so as to pull the two brake beams 33 to reset, so as to reset the brake shoe 31, so that the friction plate 32 is away from the inner wall of the brake drum 1, when the two rollers 35 are moved through the two ends of the brake block 4, so that one end of the brake beam 33 is moved to the inner wall of the brake drum 1, and the other end of the brake beam 33 is rotatably arranged around the brake shoe shaft 23, the ball bearing 6 is arranged on the inner wall of the brake shoe 23, and more than 5 times of lubricating grease can be stored between the rolling shaft 62 and the rolling shaft 62, so that long-distance driving is ensured without maintenance, and the original rolling pair is replaced by a linear contact rolling pair, so that the brake shoe shaft 23 and the ball bearing 6 rotate more sensitively, the light weight hole 37 is further arranged to reduce the weight of the brake beam 33, the reinforcing rib 38 is arranged to ensure that the strength of the structure is not reduced while realizing the light weight of the automobile, the unequal thickness friction plate structure is adopted, so that the friction material can be more reasonably used, the service life of the brake is prolonged, the punching and welding technology is used to achieve the performance requirement with the lightest weight under the condition that the strength meets the requirement, the chassis 21 is made of 45 steel isothermal quenching forged, the material inside is made more dense through forging and pressing processing methods, the crystal of the material is improved, and the strength and toughness of the material are greatly improved.

[0032] The above merely describes a preferred embodiment of the present application, and is not intended to limit the protection scope of the present application.

Claims

1. A lightened shoe structure for a drum brake, comprising a brake drum (1), characterized in that: The brake drum (1) is provided with a brake block (4) rotating therein, and a bottom plate mechanism (2) is installed on the brake drum (1), wherein the bottom plate mechanism (2) comprises a bottom disc (21), a shoe mounting rack (22) is fixedly arranged on the bottom disc (21), a shoe shaft (23) is fixedly arranged on the shoe mounting rack (22), and a shoe mechanism (3) is rotatably arranged on the shoe shaft (23); The shoe mechanism (3) comprises a shoe piece (31), the shoe piece (31) is arranged in an arc-shaped piece shape, a friction piece (32) is fixedly arranged on the outer arc surface of the shoe piece (31), a shoe piece beam (33) is fixedly arranged on the inner arc surface of the shoe piece (31), a roller (35) is rotatably arranged at one end of the shoe piece beam (33), the roller (35) is arranged in correspondence with the brake block (4), a shoe bushing (39) is fixedly arranged at the other end of the shoe piece beam (33), a ball bearing (6) is arranged on the inner wall of the shoe bushing (39), and the ball bearing (6) comprises a bearing sleeve (61) fixedly arranged on the inner wall of the shoe bushing (39), and a rolling shaft (62) is rotatably arranged in a circumferential array on the inner wall of the bearing sleeve (61).

2. The light-weighted drum brake shoe structure according to claim 1, characterized in that, Lightweight holes (37) are formed in the shoe piece beam (33).

3. The light-weighted drum brake shoe structure according to claim 1, characterized in that, The shoe piece beam (33) is arranged in an arc-shaped piece shape, and a separation piece (36) is fixedly arranged at the inner arc edge of the shoe piece beam (33), wherein a reinforcing rib (38) is fixedly arranged between the separation piece (36), the shoe piece beam (33) and the shoe piece (31).

4. The light-weighted drum brake shoe structure according to claim 1, characterized in that, The shoe mechanism (3) adopts a welded shoe structure, and the friction piece (32) adopts an unequal-thickness friction piece structure.

5. The light-weighted drum brake shoe structure according to claim 1, characterized in that, The bottom disc (21) is forged by isothermal quenching of 45 steel.

6. The light-weighted drum brake shoe structure according to claim 1, characterized by Spring pins (34) are fixedly arranged on the shoe piece beam (33), and a return spring (5) is arranged between the spring pins (34) of two shoe piece beams (33).

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