CN211648846U

CN211648846U - Anti-lock drum brake

Info

Publication number: CN211648846U
Application number: CN202020261145.8U
Authority: CN
Inventors: 王少华
Original assignee: Anhui Sanzhi Brake Co ltd
Current assignee: Anhui Sanzhi Brake Co ltd
Priority date: 2020-03-05
Filing date: 2020-03-05
Publication date: 2020-10-09
Anticipated expiration: 2030-03-05

Abstract

The utility model discloses an anti-lock drum brake, including fixed mounting in the epaxial braking backplate of car axle and with car axletree rely on antifriction bearing sliding connection's brake drum, fixed mounting has the rotation support on the braking backplate, rotate on the rotation support respectively through two erection joint round pins and be connected with the brake shoe, and two brake shoe symmetries set up in the inner circle of brake drum inboard, still respectively fixedly connected with first return spring and second return spring between two brake shoes. The utility model discloses in, when arc friction disc sticiss friction braking with the interior disc of brake drum, the arc friction disc can also compress the buffering through the bolster, can prevent or slow down the vehicle because emergency brake and the direct dead situation of wheel appears, and then reduces the car and appear the off tracking, sideslip phenomenons such as in the emergency brake in-process to be favorable to reducing the emergence of traffic accident, satisfied people's user demand.

Description

Anti-lock drum brake

Technical Field

The utility model relates to a stopper technical field especially relates to an anti-locking drum brake.

Background

The drum brake is characterized in that a brake transmission mechanism is utilized to enable a brake shoe to press a brake friction plate on the inner side of a brake drum, so that braking force is generated, wheels are decelerated or the vehicle stops within the shortest distance according to requirements, driving safety is guaranteed, and the vehicle can be parked reliably and cannot automatically slide.

An anti-lock brake system (ABS) for an automobile can monitor the speed of all wheels in real time through a rotating speed sensor to prevent the wheels from being locked, so that the steerability and the stability of the automobile during braking are kept. In recent years, the electric automobile industry in China develops rapidly, but because the traditional anti-lock brake system cannot meet the rear shaft type arrangement of the electric automobile, the traditional gear ring (with teeth arranged outside and distributed on the circumferential wall) cannot fixedly detect the rotation of the tire, and therefore, many electric automobiles on the market at present cannot be provided with the standard assembly anti-lock brake system.

In addition, when the wheels are locked by the drum brake in the prior art, the roundness, the gap, the shape and the smoothness of the working surface of the brake drum in the vehicle cannot be completely consistent, so that the generated braking torque is not completely consistent, the phenomena of deviation, sideslip and the like occur in the braking process of the vehicle, and sometimes even serious traffic accidents are caused. To this end, we provide an anti-lock drum brake.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the shortcoming that exists among the prior art, and the drum brake of anti-lock who proposes.

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

an anti-lock drum brake comprises a brake back plate fixedly mounted on an automobile axle and a brake drum slidably connected with the automobile axle by a rolling bearing, wherein a rotary support is fixedly mounted on the brake back plate, brake shoes are respectively and rotatably connected to the rotary support through two mounting connecting pins, the two brake shoes are symmetrically arranged on the inner side of an inner ring of the brake drum, a first return spring and a second return spring are respectively and fixedly connected between the two brake shoes, and the second return spring is adjacent to the rotary support;

the last cam drive axle of installing that rotates of braking backplate, fixed cover has connect the cam in the cam drive axle, and the cam sets up with rotating the support relatively, and two brake shoes keep away from one of rotating the support and serve respectively roll connection have a roller, and two rollers are located the both sides of cam respectively and offset rolling contact with the cam, still be provided with the arc friction disc between brake shoe and the brake drum, the inboard rotation of arc friction disc is connected with a plurality of connecting rods, and the outside of brake shoe is equipped with the spread groove, and the one end that the arc friction disc was kept away from to the connecting rod extends to in the spread groove and fixedly connected with is used for anti-.

Preferably, the specific material of the buffer member is any one of a buffer spring and a buffer elastic sheet.

Preferably, the arc-shaped friction plate is rotatably connected with the connecting rod through a rotating pin.

Preferably, the arc-shaped friction plate and the brake shoe are both arc-shaped integrally, and the brake drum is annular integrally.

Preferably, a plurality of connecting rods are equidistantly arranged at intervals on the inner side of the arc-shaped friction plate.

Preferably, the first return spring and the second return spring are arranged in parallel, and the first return spring is adjacent to the cam.

Compared with the prior art, the beneficial effects of the utility model are that:

1. in the utility model, the cam is driven to rotate by the cam driving shaft, the rollers and the brake shoes on two sides can be expanded when the cam rotates, the first return spring and the second return spring are stretched and deformed, and the connecting rod, the buffer part and the arc friction plate are integrally expanded outwards when the two brake shoes are expanded outwards, so that the outer arc surface of the arc friction plate is tightly pressed on the inner circular surface of the rotating brake drum, and the aim of decelerating or stopping the automobile is fulfilled by the friction force;

2. meanwhile, when the arc friction plate and the inner circular surface of the brake drum are tightly pressed for friction braking, the arc friction plate also buffers the buffer parts in the extrusion connecting grooves through the connecting rod, so that the compression deformation buffer of the buffer parts can prevent or slow down the direct occurrence of wheel locking of the vehicle due to emergency braking, thereby being beneficial to reducing the phenomena of deviation, sideslip and the like of the vehicle in the emergency braking process and further reducing traffic accidents.

3. In addition, for the vehicles which cannot be provided with standard anti-lock brake systems in the market, the risk of locking of the wheels due to emergency braking is greatly reduced, and the use requirements of people are greatly met.

To sum up, among this drum brake, the interior disc of arc friction disc and brake drum is compressing friction braking when, and the arc friction disc can also compress the buffering through the bolster, can prevent or slow down the vehicle because emergency braking and the direct situation that the wheel locks appears, and then reduces the car and appear phenomenons such as off tracking, sideslip at emergency braking in-process to be favorable to reducing the emergence of traffic accident, satisfied people's user demand greatly.

Drawings

Fig. 1 is a schematic structural diagram of an anti-lock drum brake according to the present invention;

fig. 2 is an enlarged schematic structural view of a portion a in fig. 1 according to the present invention;

fig. 3 is a schematic view of a connection structure between the cam driving shaft and the cam according to the present invention.

In the figure: the brake comprises a brake back plate 1, a brake drum 2, a rotary support 3, a mounting connecting pin 4, a brake shoe 5, an arc-shaped friction plate 6, a connecting rod 611, a buffering member 612, a connecting groove 613, a rotary pin 614, a cam driving shaft 7, a cam 8, a roller 9, a first return spring 10 and a second return spring 11.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments.

Referring to fig. 1-3, an anti-lock drum brake comprises a brake back plate 1 fixedly mounted on an automobile axle and a brake drum 2 slidably connected with the automobile axle by a rolling bearing, wherein a rotary support 3 is fixedly mounted on the brake back plate 1, brake shoes 5 are respectively rotatably connected to the rotary support 3 through two mounting connecting pins 4, the two brake shoes 5 are symmetrically arranged on the inner side of an inner ring of the brake drum 2, a first return spring 10 and a second return spring 11 are respectively and fixedly connected between the two brake shoes 5, and the second return spring 11 is adjacent to the rotary support 3;

rotate on the braking backplate 1 and install cam drive shaft 7, cam drive shaft 7 is last to be fixed to have cup jointed cam 8, and cam 8 sets up with rotating support 3 relatively, and two brake shoes 5 are kept away from one of rotating support 3 and are served roll connection respectively and have roller 9, and two rollers 9 are located cam 8's both sides respectively and offset rolling contact with cam 8, still be provided with arc friction disc 6 between brake shoe 5 and the brake drum 2, the inboard rotation of arc friction disc 6 is connected with a plurality of connecting rods 611, and the outside of brake shoe 5 is equipped with spread groove 613, and the one end that arc friction disc 6 was kept away from to connecting rod 611 extends to in spread groove 613 and fixedly connected with is used for antilock's bolster 612. The utility model discloses an anti-lock drum brake, arc friction disc 6 and brake drum 2's interior disc compress tightly when friction braking, and arc friction disc 6 can also compress the buffering through bolster 612, can prevent or slow down the vehicle because emergency braking and the direct dead risk of wheel that appears, and then reduce the car and appear the off tracking, phenomenon such as sideslip at the emergency braking in-process to be favorable to reducing the emergence of traffic accident, satisfied people's user demand.

Specifically, the specific material of the buffer 612 is any one of a buffer spring and a buffer elastic sheet.

Specifically, the arc-shaped friction plate 6 is rotatably connected with the connecting rod 611 through a rotating pin 614.

Specifically, the arc-shaped friction plate 6 and the brake shoe 5 are both arc-shaped integrally, and the brake drum 2 is annular integrally.

Specifically, the plurality of connecting rods 611 are arranged at equal intervals on the inner side of the arc-shaped friction plate 6.

Specifically, the first return spring 10 and the second return spring 11 are arranged in parallel, and the first return spring 10 is adjacent to the cam 8.

The working principle is as follows: when an automobile brakes, the cam 8 is driven to rotate by the cam driving shaft 7, and when two protruding parts on the cam 8 rotate, the rollers 9 and the brake shoes 5 on two sides can be expanded by taking the mounting connecting pin 4 as a rotation center, and meanwhile, the first return spring 10 and the second return spring 11 are stretched and deformed, and meanwhile, when the two brake shoes 5 expand outwards, the connecting rod 611, the buffer 612 and the arc-shaped friction plate 6 are integrally expanded outwards, so that the outer arc surface of the arc-shaped friction plate 6 is tightly pressed on the inner circular surface of the rotating brake drum 2, and the aim of decelerating or stopping the automobile is fulfilled by friction force; meanwhile, when the arc-shaped friction plate 6 and the inner circular surface of the brake drum 2 are subjected to tight compression friction braking, the arc-shaped friction plate 6 also buffers the buffer member 612 in the extrusion connecting groove 613 through the connecting rod 611, so that the situation that wheels of a vehicle are locked directly due to sudden braking can be prevented or slowed down through compression deformation buffering of the buffer member 612, and therefore the phenomena of deviation, sideslip and the like of the vehicle in the sudden braking process are favorably reduced, and traffic accidents are further reduced.

In addition, for the vehicles which cannot be provided with standard anti-lock brake systems in the market, the risk of locking of the wheels due to emergency braking is greatly reduced, and the use requirements of people are greatly met.

The above, only be the concrete implementation of the preferred embodiment of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art is in the technical scope of the present invention, according to the technical solution of the present invention and the utility model, the concept of which is equivalent to replace or change, should be covered within the protection scope of the present invention.

Claims

1. An anti-lock drum brake comprises a brake back plate (1) fixedly mounted on an automobile axle and a brake drum (2) slidably connected with the automobile axle through a rolling bearing, and is characterized in that a rotary support (3) is fixedly mounted on the brake back plate (1), brake shoes (5) are rotatably connected to the rotary support (3) through two mounting connecting pins (4) respectively, the two brake shoes (5) are symmetrically arranged on the inner side of an inner ring of the brake drum (2), a first return spring (10) and a second return spring (11) are fixedly connected between the two brake shoes (5) respectively, and the second return spring (11) is adjacent to the rotary support (3);

rotate on braking backplate (1) and install cam drive axle (7), fixed cover on cam drive axle (7) has connect cam (8), and cam (8) set up with rotating support (3) relatively, and one of rotating support (3) is kept away from in two brake shoes (5) serves and to serve respectively roll connection have roller (9), and two rollers (9) are located the both sides of cam (8) respectively and offset rolling contact with cam (8), still be provided with arc friction disc (6) between brake shoe (5) and brake drum (2), the inboard rotation of arc friction disc (6) is connected with a plurality of connecting rods (611), and the outside of brake shoe (5) is equipped with spread groove (613), and connecting rod (611) keep away from in the bolster one end of arc friction disc (6) extends to spread groove (613) and fixedly connected with is used for anti-lock's bumper member (612).

2. An anti-lock drum brake according to claim 1, wherein said buffer member (612) is made of any one of a buffer spring and a buffer dome.

3. Anti-lock drum brake according to claim 1, characterized in that said arc-shaped friction discs (6) are rotatably connected to the connecting rod (611) by means of a rotation pin (614).

4. An anti-lock drum brake according to claim 1, characterized in that said arc-shaped friction plates (6) and said brake shoes (5) are of an arc-shaped configuration as a whole, and said brake drum (2) is of an annular configuration as a whole.

5. An anti-lock drum brake according to claim 1, characterized in that a plurality of tie rods (611) are arranged equidistantly and at intervals inside the arc-shaped friction plates (6).

6. Anti-lock drum brake according to claim 1, characterized in that said first return spring (10) and said second return spring (11) are arranged parallel to each other and in that said first return spring (10) is adjacent to said cam (8).