阅读说明：本技术 一种新型的制动器 (Novel brake ) 是由 张家林 万志远 李映平 张太豪 王永澳 于 2021-08-26 设计创作，主要内容包括：本发明公开了一种新型的制动器,主要涉及制动器领域；包括制动鼓,所述制动鼓内设有制动轮缸总成,所述制动轮缸总成的左右两端均设有制动蹄总成,两个所述制动蹄总成之间设有复位弹簧,所述制动蹄总成的一端与制动轮缸总成抵接,另一端与制动鼓铰接,所述制动蹄总成包括腹板,所述腹板上设有翼缘,所述翼缘的横截面为等腰梯形,翼缘的两侧面上均设有摩擦衬块；所述制动鼓内设有与制动蹄总成相适应的摩擦槽,所述摩擦槽的横截面为等腰梯形；本发明结构紧凑、制动力矩大,制动效果好,能够降低制作和使用成本。(The invention discloses a novel brake, mainly relating to the field of brakes; the brake shoe assembly comprises a brake drum, wherein a brake wheel cylinder assembly is arranged in the brake drum, brake shoe assemblies are arranged at the left end and the right end of the brake wheel cylinder assembly, a return spring is arranged between the two brake shoe assemblies, one end of each brake shoe assembly is abutted against the brake wheel cylinder assembly, the other end of each brake shoe assembly is hinged with the brake drum, each brake shoe assembly comprises a web plate, a flange is arranged on each web plate, the cross section of each flange is isosceles trapezoid, and friction pads are arranged on two side faces of each flange; a friction groove matched with the brake shoe assembly is arranged in the brake drum, and the cross section of the friction groove is in an isosceles trapezoid shape; the invention has compact structure, large braking torque and good braking effect, and can reduce the manufacturing and using cost.)

1. The utility model provides a novel brake, includes brake drum (1), be equipped with brake wheel cylinder assembly (2) in brake drum (1), both ends all are equipped with brake shoe assembly (3), two about brake wheel cylinder assembly (2) be equipped with reset spring (4) between brake shoe assembly (3), the one end and brake wheel cylinder assembly (2) butt of brake shoe assembly (3), the other end is articulated with brake drum (1), brake shoe assembly (3) include web (31), be equipped with edge of a wing (32) on web (31), its characterized in that:

the cross section of the flange (32) is isosceles trapezoid, and two side faces of the flange (32) are provided with friction pads (33);

the brake drum (1) is internally provided with a friction groove (11) matched with the brake shoe assembly (3), and the cross section of the friction groove (11) is isosceles trapezoid.

2. A novel brake according to claim 1, characterized in that: both ends of the flange (32) are provided with a stop block (34), and the stop blocks (34) are fixedly connected with the web plate (31).

3. A novel brake according to claim 1, characterized in that: one end of the flange (32) close to the web (31) is provided with a flange (35) extending outwards, and the end face of one end of the flange (35) far away from the web (31) is abutted to the friction pad (33).

4. A novel brake according to claim 1, characterized in that: the middle part of one end of the flange (32) close to the web plate (31) is provided with a slot (36) which is matched with the web plate (31).

5. A novel brake according to claim 1, characterized in that: and an avoidance groove (12) is arranged at one end of the friction groove (11) far away from the brake shoe assembly (3).

6. A novel brake according to claim 1, characterized in that: brake wheel cylinder assembly (2) includes cylinder body (21), both ends all are equipped with cylinder cap (22) about cylinder body (21), cylinder body (21) are equipped with two pistons (23), the one end that piston (23) are close to cylinder cap (22) is equipped with kicking block (24), kicking block (24) run through cylinder cap (22), and with cylinder cap (22) sliding connection, the one end and web (31) butt that cylinder body (21) are stretched out in kicking block (24).

Technical Field

The invention relates to the field of brakes, in particular to a novel brake.

Background

At present, the brake shoe assembly of the existing brake generally comprises a web plate, an arc plate welded on the web plate, and a friction lining adhered or riveted on the arc plate, the contact mode between the brake shoe assembly and the inner surface of the brake drum is plane contact, the purpose of tightly contacting the brake shoe assembly with the inner surface of the brake drum is achieved by pushing one end of the brake shoe assembly through the brake wheel cylinder assembly, under the condition that the thrust provided by the brake wheel cylinder assembly is certain, the friction force between the brake shoe assembly and the brake drum is determined by the contact area between the friction lining and the brake drum, the larger the contact area is, the greater the friction, the better the braking effect, which results in that in certain applications, for optimal braking effect, larger friction linings are required, the brake has larger volume, larger installation space and higher manufacturing and using cost.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a novel brake adopting V-shaped annular surface contact, which has the advantages of compact structure, large braking torque, good braking effect and capability of reducing manufacturing and using costs.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a novel brake comprises a brake drum, wherein a brake wheel cylinder assembly is arranged in the brake drum, brake shoe assemblies are arranged at the left end and the right end of the brake wheel cylinder assembly, a return spring is arranged between the two brake shoe assemblies, one end of each brake shoe assembly is abutted against the corresponding brake wheel cylinder assembly, the other end of each brake shoe assembly is hinged with the brake drum, each brake shoe assembly comprises a web plate, a flange is arranged on each web plate,

the cross section of the flange is isosceles trapezoid, and the two side faces of the flange are provided with friction lining blocks;

and a friction groove matched with the brake shoe assembly is arranged in the brake drum, and the cross section of the friction groove is in an isosceles trapezoid shape.

Preferably, both ends of the flange are provided with stop blocks, and the stop blocks are fixedly connected with the web plate.

Preferably, one end of the flange close to the web is provided with a flange extending outwards, and the end face of one end of the flange far from the web abuts against the friction pad.

Preferably, the middle part of one end of the flange close to the web is provided with a slot adapted to the web.

Preferably, an avoidance groove is formed in one end, far away from the brake shoe assembly, of the friction groove.

Preferably, the brake wheel cylinder assembly includes the cylinder body, both ends all are equipped with the cylinder cap about the cylinder body, the cylinder body is equipped with two pistons, the one end that the piston is close to the cylinder cap is equipped with the kicking block, the kicking block runs through the cylinder cap, and with cylinder cap sliding connection, the one end and the web butt that the cylinder body was stretched out to the kicking block.

Compared with the prior art, the invention has the beneficial effects that:

the brake shoe assembly comprises two friction pads which are arranged in a V shape, the two friction pads on the brake shoe assembly are matched with friction grooves in a brake drum to form V-shaped annular surface contact, equivalent friction factors can be improved, and under the condition that thrust provided by the brake cylinder assembly is certain, the friction force obtained by the invention is larger than that of a traditional plane contact mode, the structure is compact, the braking torque is large, the braking effect is good, and the manufacturing and using cost can be reduced.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;

FIG. 3 is a schematic structural view of a brake drum;

FIG. 4 is a schematic diagram of a brake cylinder assembly;

FIG. 5 is a view in the direction B of FIG. 4;

FIG. 6 is a left side view of FIG. 4;

FIG. 7 is a cross-sectional view taken along line C-C of FIG. 6;

FIG. 8 is a schematic view of the flange structure;

FIG. 9 is a right side view of FIG. 8;

FIG. 10 is a left side view of FIG. 8;

FIG. 11 is a cross-sectional view taken along line D-D of FIG. 10;

FIG. 12 is a schematic diagram of a brake cylinder assembly;

FIG. 13 is a force analysis graph of two object plane contacts;

FIG. 14 is a force analysis graph of groove-surface contact of two objects.

The reference numbers in the drawings:

1. a brake drum; 11. a friction groove; 12. an avoidance groove;

2. a brake wheel cylinder assembly; 21. a cylinder body; 22. a cylinder cover; 23. a piston; 24. a top block;

3. a brake shoe assembly; 31. a web; 32. a flange; 33. a friction pad; 34. a stopper; 35. a flange; 36. a slot;

4. a return spring.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

Example (b): as shown in fig. 1-12, the present invention is a novel brake, which is suitable for different types of brakes such as shoe brakes, etc., and includes a brake drum 1, wherein a brake wheel cylinder assembly 2 is disposed in the brake drum 1, the brake wheel cylinder assembly 2 can adopt the prior art, and the connection manner of the brake wheel cylinder assembly 2 and the brake drum 1 can also adopt the prior art. Preferably, brake wheel cylinder assembly 2 includes cylinder body 21, both ends all are equipped with cylinder cap 22 about cylinder body 21, cylinder body 21 is equipped with two pistons 23, the one end that piston 23 is close to cylinder cap 22 is equipped with kicking block 24, kicking block 24 run through cylinder cap 22 and with cylinder cap 22 sliding connection, the one end and the web 31 butt that kicking block 24 stretches out cylinder body 21 can be with two brake shoe assemblies 3 jack-ups simultaneously. Brake wheel cylinder assembly 2 all is equipped with brake shoe assembly 3 in both ends about, two be equipped with reset spring 4 between the brake shoe assembly 3, the one end of brake shoe assembly 3 and brake wheel cylinder assembly 2's kicking block 24 butt, the other end passes through the articulated elements and is articulated with brake drum 1, brake shoe assembly 3 includes web 31, the welding has flange 32 on the web 31, and is preferred, the middle part that flange 32 is close to the one end of web 31 is equipped with slot 36 that suits with web 31, inserts the back in slot 36 with web 31, and the rewelding can guarantee the fastness of being connected between web 31 and the flange 32.

The cross section of the flange 32 is isosceles trapezoid, friction pads 33 are arranged on two side surfaces of the flange 32, and the friction pads 33 can be fixed on the flange 32 in an adhering or riveting mode;

the brake drum 1 is internally provided with a friction groove 11 matched with the brake shoe assembly 3, the cross section of the friction groove 11 is isosceles trapezoid, the flange 32 is inserted into the friction groove 11, the brake wheel cylinder assembly 2 pushes the brake shoe assembly 3, and the friction lining 33 can be in contact with the inner wall of the friction groove 11 to generate friction force.

The two friction pads 33 on the flange 32 are arranged in a V shape, the two friction pads 33 on the brake shoe assembly 3 are matched with the friction groove 11 in the brake drum 1 to form V-shaped annular surface contact, the equivalent friction factor can be improved, and under the condition that the thrust provided by the brake cylinder assembly 2 is certain, the friction force obtained by the invention is larger than that obtained by the traditional plane contact mode, so that the whole brake has a compact structure, large braking torque and good braking effect, and the manufacturing and using cost can be reduced.

Preferably, in order to prevent the friction pad from falling off, the flanges 32 are provided at both ends thereof with stoppers 34, the stoppers 34 are fixedly connected to the web 31, and the stoppers 34 block the friction pad 33, so that the friction pad 33 can be prevented from falling off along the length direction of the flanges 32 when the force is applied thereto.

Preferably, in order to prevent the pad from falling off, a flange 35 extending outward is provided at one end of the flange 32 close to the web 31, an end surface of one end of the flange 35 remote from the web 31 abuts against the pad 33, and the flange 35 is configured to block the pad 33, so that the pad 33 can be prevented from falling off in the width direction of the flange 32.

Preferably, in order to ensure effective contact between the pads and the grooves, the end of the grooves 11 remote from the shoe assembly 3 is provided with an escape groove 12, and during braking, the end face of the shoe assembly 3 can be inserted into the escape groove 12, so as to ensure effective contact between the pads 33 and the grooves 11.

The amount of friction force generated between the contact surfaces of the two objects is related to the shape of the contact surfaces of the two objects. Thus, if the contact pattern of the two objects is a flat contact, as shown in FIG. 13, then F_N21＝F_NTherefore, F_f21＝μF_N(ii) a If the contact between the two objects is groove-surface contact, as shown in FIG. 14, the groove angle is 2 θ_VDue to F_N21＝F_N/sinθ_VTherefore F is_f21＝μF_N/sinθ_V(ii) a Since 0 DEG < theta_V< 90 deg., so 0 < sin theta_V< 1, the friction force generated by the V-shaped contact is greater than that of the flat contact when other conditions of the two objects are not changed.

The equivalent friction factor of the V-shaped groove surface is 1/sin theta of plane contact_VSo that theta_VThe smaller the equivalent friction factor of the V-groove surface.

Under the condition of keeping other conditions unchanged, the equivalent friction factor of the V-shaped drum brake is changed to be 1/sin theta_VThe structure is more compact, and the device can be used in the environment with limited installation.