阅读说明：本技术 一种自行车用环保型鼓式制动器 (Environment-friendly drum brake for bicycle ) 是由 孙浙勇 俞慧勇 于 2020-06-08 设计创作，主要内容包括：本发明涉及鼓式制动器技术领域,尤其涉及一种自行车用环保型鼓式制动器,包括制动底板和制动鼓,所述制动底板的上端固定安装有制动轮缸,所述制动轮缸的两端均连接有制动蹄,所述制动蹄的下端均通过转轴与制动底板转动连接,所述制动蹄最下端相互靠近的一侧均转动连接有连接杆,所述制动底板的下端固定安装有水平状的固定管,所述固定管位于制动蹄之间,且连接杆的一端延伸至固定管的内部,所述连接杆靠近固定管的一端均连接有第一活塞,所述固定管中部的上端固定连接有第一连接管的下端,本装置使用时,能够实现制动蹄的自动调节,提高摩擦片的利用率,进而降低了装置的使用成本,使得装置更加的环保。(The invention relates to the technical field of drum brakes, in particular to an environment-friendly drum brake for a bicycle, which comprises a brake bottom plate and a brake drum, wherein the upper end of the brake bottom plate is fixedly provided with a brake wheel cylinder, two ends of the brake wheel cylinder are respectively connected with a brake shoe, the lower end of the brake shoe is respectively rotatably connected with the brake bottom plate through a rotating shaft, one side of the lowest end of the brake shoe, which is close to each other, is respectively rotatably connected with a connecting rod, the lower end of the brake bottom plate is fixedly provided with a horizontal fixed pipe, the fixed pipe is positioned between the brake shoes, one end of the connecting rod extends into the fixed pipe, one end of the connecting rod, which is close to the fixed pipe, is respectively connected with a first piston, the upper end of the middle part of the fixed pipe is fixedly connected with the lower end of a first connecting pipe, and then reduced the use cost of device for the device is more environmental protection.)

1. The environment-friendly drum brake for the bicycle comprises a brake bottom plate (1) and a brake drum (5) and is characterized in that a brake wheel cylinder (2) is fixedly mounted at the upper end of the brake bottom plate (1), brake shoes (3) are connected to the two ends of the brake wheel cylinder (2), the lower ends of the brake shoes (3) are rotatably connected with the brake bottom plate (1) through rotating shafts, a connecting rod (7) is rotatably connected to one side, close to each other, of the lowest end of each brake shoe (3), a horizontal fixed pipe (6) is fixedly mounted at the lower end of the brake bottom plate (1), the fixed pipe (6) is located between the brake shoes (3), one end of the connecting rod (7) extends to the inside of the fixed pipe (6), one end, close to the fixed pipe (6), of the connecting rod (7) is connected with a first piston (8), and the upper end of the middle of the fixed pipe (6) is fixedly connected with the lower end of a first connecting pipe, the upper end of the first connecting pipe (10) is connected with the lower end of a first storage tank (11), the upper end of the first storage tank (11) is in an open shape, the upper end of the first storage tank (11) is connected with a first cover plate (14) through threads, an exhaust hole is formed in the first cover plate (14), the lower end of the first cover plate (14) is connected with a second piston (12) through a spring (13), the second piston (12) is in contact with the side wall of the first storage tank (11), one end of a second connecting pipe (15) is connected to the side wall of the first storage tank (11), when the spring (13) is in a natural extension length, the second piston (12) covers the joint of the second connecting pipe (15) and the first storage tank (11), the other end of the second connecting pipe (15) is connected with the lower end of a second storage tank (17), a one-way valve (16) is installed on the second connecting pipe (15), the inlet end of the one-way valve (16) is close to the first reservoir (11).

2. The drum brake assembly according to claim 1, wherein the second reservoir (17) has an open top, the second reservoir (17) has a second cover plate (19) screwed to the top of the second reservoir, and the second cover plate (19) has vent holes.

3. An environmentally friendly drum brake for bicycles, as claimed in claim 2, wherein said second reservoir (17) is internally provided with a third piston (18).

4. An environmentally friendly drum brake according to claim 3, wherein a pull cord (22) is connected between said third piston (18) and said second cover plate (19).

5. The drum brake assembly as claimed in claim 1 or 4, wherein a filling opening (20) is further formed in a sidewall of the first reservoir (11), and a third cover plate (21) is screwed to an opening of the filling opening (20).

6. An environment friendly drum brake for bicycles, as claimed in claim 5, wherein said first piston (8) is fixedly mounted with a fixed block (9) on one side close to the connecting rod (7), said fixed block (9) being rotatably connected with the corresponding connecting rod (7).

7. An environmentally friendly drum brake for bicycles, as claimed in claim 6, wherein the axis of rotation between the anchor block (9) and the connecting rod (7) is parallel to the axis of rotation between the connecting rod (7) and the brake shoe (3).

8. An environmentally friendly drum brake for bicycles, as claimed in claim 7, wherein said brake shoe (3) is provided with a friction plate (4) on the side close to the brake drum (5).

9. An environmentally friendly drum brake for bicycles, as claimed in claim 8, wherein a stopper is further fixedly provided on the inner wall of the first reservoir (11), and a lower end surface of the stopper contacts with an upper end surface of the second piston (12).

Technical Field

The invention relates to the technical field of drum brakes, in particular to an environment-friendly drum brake for a bicycle.

Background

The friction plate of the drum brake is continuously worn in the use process, so that the gap between the friction plate and the brake drum is continuously enlarged, the operation lag time of the brake mechanism is increased, and the driving safety of a vehicle is influenced. In order to keep the clearance between the friction plate and the brake drum within a proper range, clearance adjusting mechanisms which are automatically adjusted, such as a pawl bolt mechanism or a worm gear mechanism, are designed, the clearance adjusting mechanisms are complex in structure, more in assembly and complex in matching relation, and the cost and the maintenance difficulty of the brake are increased.

When the friction plate is worn to the extent that the friction plate needs to be replaced, the friction plate and the whole gap adjusting mechanism are usually required to be detached together, so that the waste of parts is caused to a certain extent, and the use cost of the device is increased.

Disclosure of Invention

The invention aims to solve the defects in the prior art and provides an environment-friendly drum brake for a bicycle.

In order to achieve the purpose, the invention adopts the following technical scheme:

an environment-friendly drum brake for a bicycle comprises a brake base plate and a brake drum, wherein a brake wheel cylinder is fixedly mounted at the upper end of the brake base plate, brake shoes are connected at two ends of the brake wheel cylinder, the lower ends of the brake shoes are rotatably connected with the brake base plate through rotating shafts, one sides, close to each other, of the lowest ends of the brake shoes are rotatably connected with connecting rods, horizontal fixing pipes are fixedly mounted at the lower end of the brake base plate and positioned between the brake shoes, one ends of the connecting rods extend into the fixing pipes, one ends, close to the fixing pipes, of the connecting rods are connected with first pistons, the upper end of the middle part of each fixing pipe is fixedly connected with the lower end of a first connecting pipe, the upper end of each first connecting pipe is connected with the lower end of a first storage tank, the upper end of the first storage tank is open, and a first cover plate is connected to the upper end, the exhaust hole has been seted up on the first apron, the lower extreme of first apron passes through the spring coupling second piston, the second piston contacts with the lateral wall of first storage tank, be connected with the one end of second connecting pipe on the lateral wall of first storage tank, when the spring was in the length of natural extension, the second piston covered the second connecting pipe with the junction of first storage tank, the other end of second connecting pipe is connected with the lower extreme of second storage tank, install the check valve on the second connecting pipe, the entrance point and the first storage tank of check valve are close to mutually.

Preferably, the upper end of the second storage tank is open, the upper end of the second storage tank is connected with a second cover plate through threads, and the second cover plate is provided with an exhaust hole.

Preferably, a third piston is disposed inside the second reservoir.

Preferably, a traction rope is connected between the third piston and the second cover plate.

Preferably, a liquid filling port is further formed in the side wall of the first storage tank, and a third cover plate is connected to an opening of the liquid filling port through threads.

Preferably, a fixed block is fixedly mounted on one side, close to the connecting rod, of the first piston, and the fixed block is rotatably connected with the corresponding connecting rod.

Preferably, a rotating shaft between the fixed block and the connecting rod is parallel to a rotating shaft between the connecting rod and the brake shoe.

Preferably, friction plates are arranged on one sides, close to the brake drum, of the brake shoes.

Preferably, a stop block is further fixedly arranged on the inner wall of the first storage tank, and the lower end face of the stop block is in contact with the upper end face of the second piston.

The invention has the beneficial effects that: when the device is used, after the friction plate becomes thin, the motion amplitude of the brake shoe becomes large, so that the motion amplitude of the connecting rod becomes large, the distance between the first pistons becomes small, the first pistons can squeeze lubricating oil into the first storage tank during motion, the second pistons move upwards after being pressed, when the spring is completely compressed, redundant lubricating oil can be discharged into the second storage tank through the second connecting pipe, after the brake is stopped, the spring resets, the distance between the first pistons becomes small due to the fact that the lubricating oil between the first storage tank and the fixed pipe becomes small, and then the initial distance between the brake shoe and the brake drum becomes small, automatic adjustment of the brake shoe is achieved, the utilization rate of the friction plate is improved, the use cost of the device is further reduced, and the device is more environment-friendly.

Drawings

FIG. 1 is a schematic front view of an environment-friendly drum brake for a bicycle according to the present invention;

FIG. 2 is a schematic structural view of a fixing tube and a first reservoir of an environmentally friendly drum brake for a bicycle according to the present invention;

FIG. 3 is a schematic view of a second reservoir of an environmentally friendly drum brake for a bicycle according to the present invention.

In the figure: the brake device comprises a brake bottom plate 1, a brake wheel cylinder 2, a brake shoe 3, a friction plate 4, a brake drum 5, a fixed pipe 6, a connecting rod 7, a first piston 8, a fixed block 9, a first connecting pipe 10, a first storage tank 11, a second piston 12, a spring 13, a first cover plate 14, a second connecting pipe 15, a one-way valve 16, a second storage tank 17, a third piston 18, a second cover plate 19, a liquid injection port 20, a third cover plate 21 and a traction rope 22.

Detailed Description

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

Referring to fig. 1-3, an environment-friendly drum brake for a bicycle comprises a brake base plate 1 and a brake drum 5, wherein the brake base plate 1 is installed on a frame, the brake drum 5 is installed on an axle, a brake wheel cylinder 2 is fixedly installed at the upper end of the brake base plate 1, the brake wheel cylinder 2 can be replaced by a rotating cam correspondingly, two ends of the brake wheel cylinder 2 are both connected with brake shoes 3, the lower ends of the brake shoes 3 are both rotatably connected with the brake base plate 1 through rotating shafts, one sides of the lowest ends of the brake shoes 3 close to each other are both rotatably connected with a connecting rod 7, the lower end of the brake base plate 1 is fixedly installed with a horizontal fixing pipe 6, the fixing pipe 6 is located between the brake shoes 3, one end of the connecting rod 7 extends into the fixing pipe 6, one end of the connecting rod 7 close to the fixing pipe 6 is both connected with a first piston 8, the upper end of the middle part of the fixing, the upper end of the first connecting pipe 10 is connected with the lower end of the first storage tank 11, the upper end of the first storage tank 11 is open, the upper end of the first storage tank 11 is connected with a first cover plate 14 through threads, the first cover plate 14 is provided with an exhaust hole, the lower end of the first cover plate 14 is connected with a second piston 12 through a spring 13, the second piston 12 is contacted with the side wall of the first storage tank 11, one end of a second connecting pipe 15 is connected on the side wall of the first storage tank 11, when the spring 13 is in a natural extension length, the second piston 12 covers the junction of the second connection pipe 15 and the first reservoir 11, the other end of the second connecting pipe 15 is connected with the lower end of a second storage tank 17, a one-way valve 16 is installed on the second connecting pipe 15, the inlet end of the check valve 16 is close to the first reservoir 11, and the fixed pipe 6 and the first reservoir 11 are filled with lubricating oil.

Further, the upper end of the second storage tank 17 is open, the upper end of the second storage tank 17 is connected with a second cover plate 19 through threads, and the second cover plate 19 is provided with an exhaust hole.

Further, a third piston 18 is provided inside the second reservoir 17.

Furthermore, a pulling rope 22 is connected between the third piston 18 and the second cover plate 19, and after the second cover plate 19 is removed, the third piston 19 can be conveniently taken out through the pulling rope 22.

Furthermore, a liquid filling port 20 is further provided on the side wall of the first storage tank 11, a third cover plate 21 is connected to the opening of the liquid filling port 20 through a screw thread, and after the second cover plate 21 is opened, lubricating oil can be replenished to the first storage tank 11 through the liquid filling port 20.

Further, a fixing block 9 is fixedly mounted on one side, close to the connecting rod 7, of the first piston 8, and the fixing block 9 is rotatably connected with the corresponding connecting rod 7.

Further, the rotation axis between the fixing block 9 and the connecting rod 7 is parallel to the rotation axis between the connecting rod 7 and the brake shoe 3.

Furthermore, friction plates 4 are arranged on one sides of the brake shoes 3 close to the brake drum 5.

Further, a stopper is fixedly arranged on the inner wall of the first storage tank 11, the lower end surface of the stopper contacts with the upper end surface of the second piston 12, and the lowest position of the second piston 12 can be limited under the action of the stopper.

In the embodiment, when the device is used, after the friction plate 4 becomes thin, the movement amplitude of the brake shoe 3 becomes large, so that the movement amplitude of the connecting rod 7 becomes large, the distance between the end parts of the connecting rod 7 is smaller, the distance between the first pistons 8 becomes smaller, the first pistons 8 can squeeze lubricating oil into the first storage tank 11 when moving, the second pistons 12 move upwards after being pressed, when the springs 13 are completely compressed, redundant lubricating oil can be discharged into the second storage tank 17 through the second connecting pipes 15, because the check valves 16 are arranged on the second connecting pipes 15, the lubricating oil in the second storage tank 17 can not enter the first storage tank 11 again, after the brake is stopped, the springs 13 reset, because the lubricating oil between the first storage tank 11 and the fixed pipes 6 becomes small, the distance between the first pistons 8 becomes small, and further the initial distance between the brake shoe 3 and the brake drum 5 becomes small, so that the automatic adjustment of the brake shoe 3 is realized, the utilization rate of the friction plate 4 is improved, and the use cost of the device is further reduced, so that the device is more environment-friendly.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.