Low-noise drum brake

Abstract

The utility model is suitable for the technical field of drum brakes, and provides a low-noise drum brake which comprises a mounting plate, a brake drum brake cylinder, a reset spring, a support and a brake shoe, a threaded hole is formed in the front face of the brake drum, a hanging hole is formed in the front face of the brake shoe, a butt-joint groove is formed in the top of the brake shoe, and the mounting plate is arranged on the mounting plate. A butt joint groove is formed in the outer wall of the brake shoe, a first bolt hole is formed in the inner wall of the butt joint groove, an anti-disengaging column is fixedly connected to the inner bottom wall of the brake shoe, friction plates are movably connected to the outer wall of the brake shoe, and the split type friction plates can be sequentially installed outside the brake shoe one by one and positioned through bolts; therefore, when the friction plate is abraded after being used for a long time and needs to be replaced, the abraded single friction plate can be conveniently detached and replaced, the problem that the maintenance cost is high due to the fact that the whole friction plate needs to be replaced after being abraded is solved, the use requirement is further met, and the replacement cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to drum brake technical field, especially, relate to a low noise drum brake. BACKGROUND

[0002] Drum brake is a kind of braking mode that realizes braking by brake shoe pressing to the inside of brake drum, and drum brake is generally installed at left and right two ends, and it is widely applied to the rear wheels of various passenger cars, trucks and part of cars, and drum brake has gradually withdrawn from the car field to give way to disc brake, but due to the relatively low cost, it is still used in some economic cars, mainly for the rear wheels with small braking load and parking brake.

[0003] At present, the friction plate of drum brake adopts a whole fixed, since a large amount of heat is gathered in the braking process of brake and is difficult to dissipate, brake shoe and brake drum are more likely to deform under the influence of high temperature, and since the friction plate material is soft and the hardness is low, the friction plate is preferentially abraded in the braking process, so that the whole friction plate needs to be replaced when replacing the friction plate, and the maintenance cost is increased. UTILITY MODEL CONTENTS

[0004] The utility model provides a low noise drum brake, and aims at solving the problem of the whole fixed friction plate of drum brake, which needs to be replaced together and increases the maintenance cost.

[0005] The utility model is realized in this way, a low noise drum brake, including mounting plate, brake drum brake pump, reset spring, support and brake shoe, the front of brake drum is equipped with threaded hole, the front of brake shoe is equipped with hanging hole, the top of brake shoe is equipped with the butt joint groove, the inner wall of butt joint groove is equipped with first bolt hole, the inner bottom wall of brake shoe is fixedly connected with anti-off column, the outer wall of brake shoe is movably connected with friction plate, one side of friction plate is fixedly connected with butt joint block, the top of butt joint block is equipped with second bolt hole, one side of butt joint block is fixedly connected with positioning frame, the top of butt joint block is movably connected with bolt, the front of mounting plate is fixedly connected with limiting column.

[0006] Preferably, the inner wall of brake shoe is equipped with through hole, one side of friction plate is equipped with heat dissipation hole, and the through hole is horizontally aligned with the heat dissipation hole.

[0007] Preferably, the friction plate is movably connected with brake shoe through butt joint block, and the outer wall of butt joint block is movably connected with the inner wall of butt joint groove.

[0008] Preferably, the bolt is threadedly connected with brake shoe and butt joint block through first bolt hole and second bolt hole respectively.

[0009] Preferably, the limiting posts are staggered at both ends of the friction plate and fixedly connected with the mounting plate, and the limiting posts are hard rubber limiting posts.

[0010] Preferably, the bottom of the positioning frame is provided with a connecting groove matched with the anti-dropping post, and the positioning frame is an L-shaped positioning frame.

[0011] Preferably, the outer wall of the anti-dropping post is fixedly connected with an anti-dropping sleeve, and the anti-dropping sleeve is a rubber anti-dropping sleeve.

[0012] Compared with the prior art, the embodiment of the application has the following beneficial effects:

[0013] By setting the split friction plate, the single friction plate can be sequentially installed outside the brake shoe and positioned by the bolt, so that the worn single friction plate can be conveniently disassembled and replaced when the friction plate is worn after long-term use, thereby avoiding the problem of high maintenance cost caused by the need to replace the whole friction plate when the friction plate is worn, further meeting the use requirement and reducing the replacement cost. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 is a schematic diagram of the mounting plate structure of the utility model;

[0016] Figure 3 is a schematic diagram of the friction plate structure of the utility model;

[0017] Figure 4 is a schematic diagram of the brake shoe structure of the utility model.

[0018] In the drawing: 1, mounting plate; 2, brake drum; 3, threaded hole; 4, brake master cylinder; 5, return spring; 6, bracket; 7, brake shoe; 8, hanging hole; 9, through hole; 10, butt joint groove; 11, first bolt hole; 12, anti-dropping post; 13, anti-dropping sleeve; 14, friction plate; 15, butt joint block; 16, heat dissipation hole; 17, second bolt hole; 18, positioning frame; 19, bolt; 20, limiting post. DETAILED DESCRIPTION

[0019] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use herein of terms such as "comprise", "have" and "include" or variations such as "comprises", "comprising", "containing", "having" and "includes" is intended to be open-ended, and includes one or more items recited thereafter, including equivalents. The terms "first", "second", and the like, used in the description and in the claims, do not necessarily imply a particular order but are used to identify particular objects.

[0020] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment.

[0021] The utility model embodiment provides a kind of low noise drum brake, as shown in Figures 1-4 The front surface of the brake drum 2 is provided with a threaded hole 3, the front surface of the brake shoe 7 is provided with a hanging hole 8, the top of the brake shoe 7 is provided with a butt joint groove 10, the inner wall of the butt joint groove 10 is provided with a first bolt hole 11, the inner bottom wall of the brake shoe 7 is fixedly connected with an anti-dropping column 12, the outer wall of the brake shoe 7 is movably connected with a friction plate 14, one side of the friction plate 14 is fixedly connected with a butt joint block 15, the top of the butt joint block 15 is provided with a second bolt hole 17, one side of the butt joint block 15 is fixedly connected with a positioning frame 18, the top of the butt joint block 15 is movably connected with a bolt 19, and the front surface of the mounting plate 1 is fixedly connected with a limiting column 20.

[0022] It needs to be explained that, since the existing drum brake friction plate adopts a whole fixed, since the brake gathers a lot of heat during braking and is difficult to dissipate, the brake shoe and the brake drum are more prone to deformation under the influence of high temperature, and since the friction plate material is soft and has low hardness, the friction plate will be preferentially worn during braking, resulting in the need to replace the whole friction plate when replacing the friction plate, thereby increasing the maintenance cost, therefore, in order to solve the problem that the existing drum brake friction plate adopts a whole fixed, resulting in the need to replace the whole friction plate when replacing the friction plate, thereby increasing the maintenance cost, the present scheme sets a split friction plate 14, which can be installed on the brake shoe 7 one by one and positioned by the bolt 19, so that the worn single friction plate 14 can be conveniently replaced when the friction plate 14 is worn after long-term use, avoiding the problem of high maintenance cost caused by the need to replace the whole friction plate 14 when the friction plate 14 is worn, further meeting the use requirement and reducing the replacement cost.

[0023] Specifically, in the present embodiment, the inner wall of the brake shoe 7 is provided with a through hole 9, and the friction plate 14 is provided with a heat dissipation hole 16, and the through hole 9 is horizontally aligned with the heat dissipation hole 16, so that air can circulate and the friction plate 14 is prevented from being overheated.

[0024] As shown in the further preferred embodiment of the present application, Figure 2 The friction plate 14 is connected with the brake shoe 7 through the butt block 15, and the outer wall of the butt block 15 is connected with the inner wall of the butt groove 10, so that the friction plate 14 can be positioned and connected, thereby improving the connection and stability of the friction plate 14 after installation.

[0025] In the present embodiment, when the single worn friction plate 14 needs to be disassembled and replaced, the bolt 19 is rotated out of the first bolt hole 11 and the second bolt hole 17, and then the friction plate 14 and the brake shoe 7 are disassembled, so that the butt block 15 and the butt groove 10 are separated, and the positioning frame 18 is separated from the anti-disengagement column 12 when the friction plate 14 is disassembled, thereby facilitating the replacement of the single worn friction plate 14.

[0026] As shown in the further preferred embodiment of the present application, Figure 2 The bolt 19 is threadedly connected with the brake shoe 7 and the butt block 15 through the first bolt hole 11 and the second bolt hole 17, respectively.

[0027] In the present embodiment, the friction plate 14 can be conveniently disassembled and replaced.

[0028] As shown in the further preferred embodiment of the present application, Figure 2 The limiting columns 20 are fixedly connected with the mounting plate 1 and are arranged alternately at both ends of the friction plate 14, and the limiting columns 20 are hard rubber limiting columns.

[0029] In the embodiment, the friction plate 14 can be limited, and the stability of the friction plate 14 after installation is further improved.

[0030] In the further preferred embodiment of the utility model, as shown in the figure, Figure 3 The bottom of the positioning frame 18 is provided with a connecting groove matched with the anti-off column 12, and the positioning frame 18 is an L-shaped positioning frame.

[0031] In the embodiment, the positioning frame 18 and the anti-off column 12 are butt-jointed, so that the stability of the friction plate 14 after installation is improved.

[0032] In the further preferred embodiment of the utility model, as shown in the figure, Figures 2-4 The outer wall of the anti-off column 12 is fixedly connected with an anti-off sleeve 13, and the anti-off sleeve 13 is a rubber anti-off sleeve.

[0033] In the embodiment, the positioning frame 18 can be positioned, and the friction plate 14 is prevented from being separated due to loosening of the bolt 19.

[0034] It should be noted that, for the foregoing embodiments, in order to simply describe, they are all expressed as a series of action combinations, but those skilled in the art should know that the utility model is not limited by the action sequence described, because according to the utility model, some steps can be performed in other sequences or simultaneously. Secondly, those skilled in the art should know that the embodiments described in the specification all belong to preferred embodiments, and the actions and modules involved are not necessarily necessary for the utility model.

[0035] In several embodiments provided by the present application, it should be understood that the disclosed device can be implemented by other ways. For example, the device embodiments described above are only schematic, and for example, the division of the above units can be different, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual coupling or communication connection can be indirect coupling or communication connection through some interfaces, and can be electrical or other forms.

[0036] The units described as separate components can or can not be physically separate, and the components displayed as units can or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. According to actual needs, part or all of the units can be selected to achieve the purpose of the embodiment scheme.

[0037] The above examples are only used to illustrate the technical solutions of the present application, and are not intended to limit the protection scope of the present application. Obviously, the described examples are only some of the embodiments of the present application, not all the embodiments. Based on these examples, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of the present application. Although the present application has been described in detail with reference to the above examples, those of ordinary skill in the art can still combine, add or delete the features in the embodiments of the present application according to the circumstances without creative labor, so as to obtain different other technical solutions which do not deviate from the concept of the present application in essence, and these technical solutions also fall within the scope of the present application.

Claims

1. A low-noise drum brake, characterized in that: The invention comprises a mounting plate (1), a brake drum (2), a brake cylinder (4), a return spring (5), a bracket (6) and a brake shoe (7): a threaded hole (3) is provided on the front of the brake drum (2), a hanging hole (8) is provided on the front of the brake shoe (7), a docking groove (10) is provided on the top of the brake shoe (7), a first bolt hole (11) is provided on the inner wall of the docking groove (10), an anti-slip column (12) is fixedly connected to the inner bottom wall of the brake shoe (7), a friction plate (14) is movably connected to the outer wall of the brake shoe (7), a docking block (15) is fixedly connected to one side of the friction plate (14), a second bolt hole (17) is provided on the top of the docking block (15), a positioning frame (18) is fixedly connected to one side of the docking block (15), a bolt (19) is movably connected to the top of the docking block (15), and a limiting column (20) is fixedly connected to the front of the mounting plate (1).

2. A low-noise drum brake according to claim 1, characterized in that: A through hole (9) is provided on the inner wall of the brake shoe (7), a heat dissipation hole (16) is provided on one side of the friction plate (14), and the through hole (9) and the heat dissipation hole (16) are horizontally aligned.

3. A low-noise drum brake according to claim 1, characterized in that: The friction plate (14) is movably connected to the brake shoe (7) via a docking block (15), and the outer wall of the docking block (15) is movably connected to the inner wall of the docking groove (10).

4. A low-noise drum brake according to claim 1, characterized in that: The bolt (19) is threadedly connected to the brake shoe (7) and the docking block (15) through the first bolt hole (11) and the second bolt hole (17), respectively.

5. A low-noise drum brake according to claim 1, characterized in that: The limiting columns (20) are staggeredly arranged at both ends of the friction plate (14) and fixedly connected to the mounting plate (1), and the limiting columns (20) are hard rubber limiting columns.

6. A low-noise drum brake according to claim 1, characterized in that: A connecting groove matching the anti-slip column (12) is provided at the bottom of the positioning frame (18), and the positioning frame (18) is an L-shaped positioning frame.

7. A low-noise drum brake according to claim 1, characterized in that: The outer wall of the anti-slip column (12) is fixedly connected with an anti-slip sleeve (13), and the anti-slip sleeve (13) is a rubber anti-slip sleeve.

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