CN218780674U

CN218780674U - Drum brake

Info

Publication number: CN218780674U
Application number: CN202222475840.6U
Authority: CN
Inventors: 蔡蓓蓓; 冯勇
Original assignee: Zhejiang Liuhe Industrial Co ltd
Current assignee: Zhejiang Liuhe Industrial Co ltd
Priority date: 2022-09-19
Filing date: 2022-09-19
Publication date: 2023-03-31
Anticipated expiration: 2032-09-19

Abstract

The utility model provides a drum brake belongs to stopper technical field, and it has solved current drum brake's friction disc and has adopted a monoblock fixed, and not only heat-sinking capability is relatively poor to need a monoblock to change together when changing the friction disc, increased the problem of maintenance cost. This drum brake, including mounting panel, brake drum and friction disc, a plurality of mounting holes have been seted up at the back of mounting panel, and the quantity of mounting hole is four, and the front of mounting panel is fixed with the braking wheel cylinder, and the front of mounting panel is fixed with the support, and the inboard of support is rotated and is connected with the brake shoe, and the quantity of brake shoe is two, and the hanging hole has been seted up on the surface of brake shoe, and swing joint has reset spring between the hanging hole, and the laminating groove has all been seted up to both sides around the brake shoe, and the inboard of friction disc is fixed with the binding plate. The utility model discloses a friction disc components of a whole that can function independently design has not only reduced the cost of changing the friction disc to the heat-sinking capability of friction disc has been improved.

Description

Drum brake

Technical Field

The utility model relates to a stopper technical field relates to a stopper, especially a drum brake.

Background

Drum brakes, also called block brakes, are used to brake by pressing brake blocks against brake wheels. The main stream of the drum brake is of an inward-expanding type, a brake block of the drum brake is positioned on the inner side of a brake wheel, and the brake block is expanded outwards to rub the inner side of the brake wheel during braking, so that braking force is generated, the purpose of braking is achieved, the wheel is decelerated or stopped within the shortest distance as required, driving safety is ensured, and the reliable parking of an automobile is ensured, and the automatic sliding cannot be realized.

Through search, as chinese patent literature discloses an improved drum brake [ application number: CN201620435889.0; publication No.: CN205654739U ]. The drum brake comprises a brake drum, brake shoes, a brake bottom plate and a cam, wherein the brake bottom plate and the brake shoes are arranged in the brake drum; one end of the brake shoe is connected with the brake bottom plate through a cam mechanism, and the other end of the brake shoe is connected with the brake bottom plate through a bracket; and a limiting floating mechanism is arranged in the support.

The friction disc of the drum brake disclosed in the patent is fixed by a whole block, the brake is difficult to dissipate by gathering a large amount of heat in the braking process, a brake shoe and a brake drum are easy to deform under the influence of high temperature, the phenomena of brake recession and vibration are easy to generate, the braking efficiency is reduced, and the friction disc is preferentially worn in the braking process due to the fact that the friction disc is made of soft materials and is low in hardness, so that the service life of the friction disc is very short, the friction disc needs to be replaced by a whole block when being replaced, and the maintenance cost is increased.

SUMMERY OF THE UTILITY MODEL

The utility model aims at having the above-mentioned problem to current technique, provided a drum brake, this stopper adopts friction disc components of a whole that can function independently design, has not only reduced the cost of changing the friction disc to the heat-sinking capability of friction disc has been improved.

The purpose of the utility model can be realized by the following technical proposal:

the utility model provides a drum brake, includes mounting panel, brake drum and friction disc, a plurality of mounting holes have been seted up at the back of mounting panel, the quantity of mounting hole is four, the front of mounting panel is fixed with the braking wheel cylinder, the front of mounting panel is fixed with the support, the inboard rotation of support is connected with the brake shoe, the quantity of brake shoe is two, the hanging hole has been seted up on the surface of brake shoe, swing joint has reset spring between the hanging hole, laminating groove has all been seted up to both sides around the brake shoe, the inboard of friction disc is fixed with the rigging board, the internal thread of rigging board is connected with fixing bolt, the inboard of brake shoe is fixed with the fixed plate, fixing bolt and fixed plate threaded connection.

The utility model discloses a theory of operation is: when the brake shoe is used, a driver steps on the brake pedal to drive the brake wheel cylinder to extrude to two sides for braking, the brake shoe can be reset by the reset spring after braking to release braking force, the ventilation area is increased by the aid of the clearance fit of the friction plates and the heat dissipation holes, the ventilation paths can be formed by the through holes and the heat dissipation holes, thermal deformation of the brake shoe is reduced, when the friction plates are worn or damaged, the friction plates can be detached by the aid of the fixing bolts, and maintenance cost is reduced due to the fact that the friction plates can be independently replaced by the aid of split design.

The surface of the brake shoe is provided with a plurality of through holes, and the surface of the friction plate is provided with a plurality of heat dissipation holes.

The through holes and the heat dissipation holes can improve the heat dissipation capacity of the friction plate and the brake shoe.

The diameters of the through holes and the diameters of the heat dissipation holes are the same, and the positions of the through holes correspond to the positions of the heat dissipation holes.

By adopting the design, the air circulation can be ensured, and the blockage is avoided.

A plurality of threaded holes are formed in the surface of the brake drum, and the threaded holes are uniformly distributed in the surface of the brake drum.

The threaded holes are used for facilitating the installation of the brake drum on a tire of a vehicle.

The radian of the friction plates is the same as that of the brake shoe, and gaps with the same distance are arranged between the friction plates.

By adopting the design, the brake shoes of the friction plate can be ensured to be tightly attached.

The width of the attaching plate is smaller than that of the attaching groove, and the appearance of the fixing plate is the same as that of the attaching plate.

The friction plate is convenient to fix and the attractive appearance is improved by adopting the design.

The surface of the brake drum is fixed with a plurality of reinforcing ribs, and the reinforcing ribs are uniformly distributed on the surface of the brake drum.

The strength of the brake drum can be improved by adopting the reinforcing ribs.

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

1. the utility model discloses a friction disc components of a whole that can function independently design, space cooperation louvre between the friction disc has increased draught area, can take away the heat that friction braking produced, the heat altered volume of brake shoe has been reduced, because a plurality of friction disc monomers are split into to the friction disc, one or several impaired severlies in the friction disc monomer, can change alone, it then needn't change not to have the damage, the maintenance cost is reduced, the friction disc of having solved current drum brake adopts a monoblock fixed, not only heat-sinking capability is relatively poor, and need a monoblock to change together when changing the friction disc, the problem of maintenance cost has been increased.

2. The utility model discloses a through-hole and louvre can form the ventilation route, increase the speed of heat effluvium, improve the heat-sinking capability of friction disc and brake shoe.

3. The utility model discloses a screw hole is convenient for fix the brake drum, installs the brake drum on the tire of vehicle, conveniently overhauls.

Drawings

Fig. 1 is a schematic perspective view of the present invention;

FIG. 2 is a schematic view of a partial three-dimensional structure of the present invention;

FIG. 3 is a schematic view of a partial three-dimensional structure of the present invention;

fig. 4 is a schematic view of a partial three-dimensional structure of the present invention.

In the figure: 1. mounting a plate; 2. a brake drum; 3. a friction plate; 4. mounting holes; 5. a brake cylinder; 6. a support; 7. a brake shoe; 8. hanging holes; 9. a return spring; 10. a fitting groove; 11. fixing the bolt; 12. a fixing plate; 13. a through hole; 14. heat dissipation holes; 15. a threaded hole; 16. reinforcing ribs; 17. and (7) laminating the plates.

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. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Referring to fig. 1-4, the drum brake includes a mounting plate 1, a brake drum 2 and a friction plate 3, the back of the mounting plate 1 is provided with a plurality of mounting holes 4, the number of the mounting holes 4 is four, a brake cylinder 5 is fixed on the front of the mounting plate 1, a bracket 6 is fixed on the front of the mounting plate 1, the inner side of the bracket 6 is rotatably connected with brake shoes 7, the number of the brake shoes 7 is two, hanging holes 8 are formed in the surface of the brake shoes 7, a return spring 9 is movably connected between the hanging holes 8, fitting grooves 10 are formed in the front side and the rear side of the brake shoes 7, a fitting plate 17 is fixed on the inner side of the friction plate 3, a fixing bolt 11 is connected to the inner thread of the fitting plate 17, a fixing plate 12 is fixed on the inner side of the brake shoes 7, and the fixing bolt 11 is in threaded connection with the fixing plate 12; this drum brake adopts 3 components of a whole that can function independently designs of friction disc, clearance fit louvre 14 between the friction disc 3 has increased draught area, can take away the heat that friction braking produced, the heat altered shape volume of brake shoe 7 has been reduced, because 3 monomers of a plurality of friction discs are split into to friction disc 3, one or several pieces are impaired seriously in 3 monomers of friction disc, can change alone, it then needn't change not to have the damage, the maintenance cost is reduced, friction disc 3 of having solved current drum brake adopts a monoblock fixed, not only the heat-sinking capability is relatively poor, and need a monoblock to change together when changing friction disc 3, the problem of maintenance cost has been increased.

The surface of the brake shoe 7 is provided with a plurality of through holes 13, the surface of the friction plate 3 is provided with a plurality of radiating holes 14, and the through holes 13 and the radiating holes 14 can form a ventilation path, so that the heat radiating speed is increased, and the heat radiating capacity of the friction plate 3 and the brake shoe 7 is improved.

The diameter of the through hole 13 is the same as that of the heat dissipation hole 14, the through hole 13 corresponds to the position of the heat dissipation hole 14, and the design can ensure air circulation, prevent shielding and avoid blocking.

A plurality of screw holes 15 have been seted up on the surface of brake drum 2, and screw hole 15 evenly distributed is on the surface of brake drum 2, and screw hole 15 is convenient for fixed brake drum 2, installs brake drum 2 on the tire of vehicle, conveniently overhauls.

The radian of the friction plate 3 is the same as that of the brake shoe 7, and gaps with the same distance are arranged between the friction plates 3, so that the friction plate 3 can be tightly attached to the brake shoe 7, the gap between the friction plate 3 and the brake shoe 7 is prevented, and the friction plate 3 is prevented from being excessively worn.

The width of the attaching plate 17 is smaller than the width of the attaching groove 10, the appearance of the fixing plate 12 is the same as that of the attaching plate 17, the friction plate 3 is convenient to fix due to the design, the attractiveness of the friction plate 3 is improved, and the protrusion is avoided.

The surface mounting of brake drum 2 has a plurality of strengthening ribs 16, and strengthening rib 16 evenly distributed is on the surface of brake drum 2, and strengthening rib 16 can improve the intensity of brake drum 2, avoids appearing the cracked condition of junction.

The utility model discloses a theory of operation: when the brake shoe is used, a driver steps on a brake pedal, a hydraulic system of a vehicle drives a brake cylinder 5 to extrude towards two sides, the brake cylinder 5 drives a brake shoe 7 and a friction plate 3 to extrude a brake drum 2 to brake, a return spring 9 can reset the brake shoe 7 after braking to remove braking force, a ventilation area is increased by matching a gap between the friction plates 3 with a heat dissipation hole 14, a ventilation path can be formed by a through hole 13 and the heat dissipation hole 14, the heat dissipation speed is increased, the heat generated by friction braking can be taken away, the heat deformation of the brake shoe 7 is reduced, when the friction plates 3 are worn or damaged, a worker can detach the friction plates 3 through a fixing bolt 11, the friction plates 3 can be independently replaced by adopting a split design, and the friction plates without damage do not need to be replaced, so that the maintenance cost is reduced.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A drum brake comprising a mounting plate (1), a brake drum (2) and a friction plate (3), characterized in that: a plurality of mounting holes (4) have been seted up at the back of mounting panel (1), the quantity of mounting hole (4) is four, the front of mounting panel (1) is fixed with braking wheel cylinder (5), the front of mounting panel (1) is fixed with support (6), the inboard rotation of support (6) is connected with brake shoe (7), the quantity of brake shoe (7) is two, hanging hole (8) have been seted up on the surface of brake shoe (7), swing joint has reset spring (9) between hanging hole (8), laminating groove (10) have all been seted up to both sides around brake shoe (7), the inboard of friction disc (3) is fixed with rigging board (17), the inside threaded connection of rigging board (17) has fixing bolt (11), the inboard of brake shoe (7) is fixed with fixed plate (12), fixing bolt (11) and fixed plate (12) threaded connection.

2. A drum brake according to claim 1, in which: the surface of the brake shoe (7) is provided with a plurality of through holes (13), and the surface of the friction plate (3) is provided with a plurality of heat dissipation holes (14).

3. A drum brake according to claim 2, in which: the diameter of the through hole (13) is the same as that of the heat dissipation hole (14), and the positions of the through hole (13) and the heat dissipation hole (14) correspond to each other.

4. A drum brake according to claim 1 in which: the surface of the brake drum (2) is provided with a plurality of threaded holes (15), and the threaded holes (15) are uniformly distributed on the surface of the brake drum (2).

5. A drum brake according to claim 1, in which: the radian of the friction plates (3) is the same as that of the brake shoes (7), and gaps with the same distance are arranged between the friction plates (3).

6. A drum brake according to claim 1, in which: the width of the attaching plate (17) is smaller than that of the attaching groove (10), and the appearance of the fixing plate (12) is the same as that of the attaching plate (17).

7. A drum brake according to claim 1, in which: the surface of the brake drum (2) is fixed with a plurality of reinforcing ribs (16), and the reinforcing ribs (16) are uniformly distributed on the surface of the brake drum (2).