Drum brake of heavy truck

Abstract

The utility model belongs to the technical field of vehicle braking, in particular to a drum brake of a heavy truck, which comprises a fixed bottom plate, a brake shoe, a driving cylinder and a return spring, mounting seats of the brake shoe are rotatably connected onto the fixed bottom plate through a rotating shaft, and the driving cylinder and the return spring are mounted between the mounting seats. A brake pad is integrally arranged on an arc-shaped base plate arranged on the outer side of the placement seat, a connecting lug on the arc-shaped base plate is fixedly connected to the placement seat through a fixing bolt, and a rubber gasket is arranged between the arc-shaped base plate and the placement seat. According to the utility model, the brake pad is arranged on the placement seat through the arc-shaped substrate and is matched with the placement seat to form a complete brake shoe, when maintenance and overhaul are needed, the arc-shaped substrate can be separated from the placement seat only by disassembling the bolts for fixing the arc-shaped substrate on the placement seat, and after a new arc-shaped substrate is replaced and installed, the brake shoe can be repaired. And the structure is simple, the whole operation is simple and convenient, the maintenance efficiency of the embroidery is high, and the use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicle brakes, in particular to a heavy truck drum brake. Background Art

[0002] Drum brakes, also called block brakes, achieve braking by pressing the brake pads against the brake wheel. Drum brakes are an early design of the braking system, with the brake pads (brake shoes) located inside the brake wheel. When braking, the brake pads open outwards and rub against the inside of the brake wheel to achieve the purpose of braking.

[0003] Drum brakes are cheap and in line with traditional designs. During the braking process of a four-wheeled car, due to the effect of inertia, the load on the front wheels usually accounts for 70%-80% of the total load of the car. The front wheel braking force is greater than the rear wheel, and the rear wheel plays an auxiliary braking role. Therefore, in order to save costs, car manufacturers use a front disc and rear drum braking method. However, for heavy vehicles, since the speed is generally not very high, the durability of the brake shoes is also higher than that of disc brakes, so many heavy vehicles still use a four-wheel drum design.

[0004] However, as a component for manufacturing the braking force of heavy-duty drum brakes, brake pads play a vital role. After being used for a period of time, they are worn out and cannot meet the needs of effective braking. Therefore, the brakes or brake pads need to be replaced. The existing brake pads are fixedly installed on the brake shoes of the brakes. The entire brake shoes need to be removed before the brake pads can be disassembled and replaced. The operation is cumbersome and inconvenient to use. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a heavy-duty truck drum brake, which solves the problem that the existing brake pad is fixedly installed on the brake shoe of the brake, and the entire brake shoe needs to be removed before the brake pad can be disassembled and replaced, which is cumbersome and inconvenient to use.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned purpose, the utility model specifically adopts the following technical solutions:

[0009] A heavy truck drum brake comprises a fixed base plate, a brake shoe, a driving cylinder and a return spring. The mounting seat of the brake shoe is rotatably connected to the fixed base plate via a rotating shaft, the driving cylinder and the return spring are arranged between the mounting seats, and a brake pad is integrally arranged on an arc-shaped base plate arranged outside the mounting seat, the connecting ear on the arc-shaped base plate is fixedly connected to the mounting seat via fixing bolts, and a rubber gasket is arranged between the arc-shaped base plate and the mounting seat.

[0010] Furthermore, an outer side of the mounting seat is provided with a mounting groove for fitting into the arc-shaped substrate, a brake pad on one side of the arc-shaped substrate is provided with evenly distributed countersunk grooves, and a connecting ear and a limiting plug are integrally provided on one side of the arc-shaped substrate that is attached to the mounting seat, through grooves are provided at positions corresponding to the connecting ears and the limiting plug, and the connecting ears are fixedly connected to the fixing bolts through the through grooves, the fixing bolts are threadedly connected to the bolt seats provided on the mounting seat, and the limiting plugs are provided in cooperation with the through grooves at the corresponding positions.

[0011] Furthermore, one end of the driving cylinder is rotatably connected to the rotating shaft through a connecting ring sleeve, and the other end of the driving cylinder is rotatably connected to a rivet through a connecting ring, and the rivet is fixedly connected to a through hole opened on the mounting seat.

[0012] Furthermore, hooks are integrally provided at both ends of the return spring, and the hooks are hung on spring hanging holes opened at corresponding positions of the mounting seat.

[0013] (III) Beneficial effects

[0014] Compared with the prior art, the utility model provides a heavy truck drum brake, which has the following beneficial effects:

[0015] The utility model discloses that the brake pad is installed on the mounting seat through the arc-shaped base plate, and they are matched together to form a complete brake shoe. When maintenance and repair are needed, it is only necessary to remove the bolts fixing the arc-shaped base plate on the mounting seat, so that the arc-shaped base plate can be separated from the mounting seat, and after replacing with a new one and installing it, the two can be fixed by the bolts. The utility model has a simple structure, the whole operation is simple and convenient, the maintenance efficiency is high, and it is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is an exploded view of the brake shoe in the utility model;

[0018] Figure 3 It is a cross-sectional view of the placement seat in the utility model.

[0019] In the figure: 1. fixed base plate; 2. brake shoe; 201. mounting seat; 2011. mounting groove; 2012. bolt seat; 2013. through hole; 2014. spring hanging hole; 2015. through groove; 202. arc base plate; 2021. brake pad; 2022. sink groove; 2023. connecting ear; 2024. limiting plug; 203. rubber gasket; 204. fixing bolt; 3. driving cylinder; 4. return spring. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example

[0022] like Figure 1 , Figure 2 and Figure 3 As shown, an embodiment of the utility model proposes: a heavy-duty truck drum brake, comprising a fixed base plate 1, a brake shoe 2, a driving cylinder 3 and a return spring 4. The mounting seat 201 of the brake shoe 2 is rotatably connected to the fixed base plate 1 through a rotating shaft. The fixed base plate 1 serves as a mounting component of the entire brake, and cooperates with bolts to stably connect the entire brake to the wheel hub of the heavy truck to achieve the purpose of stable installation. The driving cylinder 3 and the return spring 4 are arranged between the mounting seats 201. The driving cylinder 3 is used to push the brake shoe 2 to move on the fixed base plate 1, so that the brake shoe 2 contacts the brake hub to achieve the purpose of stable braking. At the same time, after the braking is completed, the driving cylinder 3 cancels the driving force on the brake shoe 2, and the return spring 4 is used to drive the brake shoe 2 to move and reset, so as to achieve the cancellation operation of the brake, and the mounting seat 2 01 A brake pad 2021 is integrally provided on the curved substrate 202 placed on the outer side, and the brake pad 2021 is used as the contact component between the brake and the brake hub, and the friction between the two is used to generate braking force to achieve the purpose of effective braking. The connecting ear 2023 on the curved substrate 202 is fixedly connected to the mounting seat 201 by a fixing bolt 204, ensuring that the curved substrate 202 is stably installed on the mounting seat 201, realizing rapid disassembly and assembly operations between the two, improving the convenience of use, and facilitating subsequent maintenance and repair. In addition, a rubber gasket 203 is placed between the curved substrate 202 and the mounting seat 201 to form a soft contact between the two, so as to buffer the stress acting on the two components during braking, reduce wear during use, extend the service life, and achieve long-term and stable use.

[0023] like Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, a placement groove 2011 is provided on the outer side of the placement seat 201 to fit the arc-shaped substrate 202, and the brake pad 2021 is stably installed on the placement seat 201 by using the arc-shaped substrate 202, so that the two are stably matched and connected together and can be used stably. The brake pad 2021 on one side of the arc-shaped substrate 202 is provided with evenly distributed sink grooves 2022, and the sink grooves 2022 are convenient for enhancing the contact braking efficiency between the brake pad 2021 and the brake hub, thereby enhancing the braking effect. A connecting ear 2023 and a limiting plug block 2024 are integrally provided on one side of the arc-shaped substrate 202 that is attached to the placement seat 201, and through grooves 2015 are provided on the placement seat 201 at positions corresponding to the connecting ear 2023 and the limiting plug block 2024. The connecting ear 2023, the limiting plug block 2024 and the through groove 2015 on the placement seat 201 are used. The cooperation between them can stably install the curved base plate 202 and the brake pad 2021 on the mounting seat 201, so that the two are smoothly connected, and at the same time it is convenient to achieve quick and convenient disassembly and assembly operations, which is convenient for subsequent maintenance and repair, and improves the convenience of use. The connecting ear 2023 passes through the through slot 2015 and is fixedly connected to the fixing bolt 204. The fixing bolt 204 is threadedly connected to the bolt seat 2012 set on the mounting seat 201. The connecting ear 2023 is stably connected to the mounting seat 201 by using the fixing bolt 204, so that the curved base plate 202 and the mounting seat 201 are stably connected. The limiting plug block 2024 is cooperated with the through slot 2015 at the corresponding position to improve the stability of the connection between the two, and avoid the curved base plate 202 and the brake pad 2021 from falling off from the mounting seat 201 during braking, thereby ensuring stable use.

[0024] like Figure 1 , Figure 2 and Figure 3 As shown, in some embodiments, one end of the driving cylinder 3 is rotatably connected to the rotating shaft through a connecting ring sleeve, so that one end of the driving cylinder 3 can be stably connected to the mounting seat 201, so that appropriate rotation can be generated during the operation of the driving cylinder 3 to avoid operation interference and ensure stable and smooth operation. The other end of the driving cylinder 3 is rotatably connected to the rivet through a connecting ring. During operation, the end of the driving cylinder 3 can generate appropriate rotation on the rivet to avoid motion interference and ensure stable operation. The rivet is fixedly connected to the through hole 2013 opened on the mounting seat 201, so that the other end of the driving cylinder 3 can be connected to another mounting seat 201. When the driving cylinder 3 is running, the entire brake shoe 2 is pushed to rotate around the rotating shaft on the fixed base plate 1, so that the brake pad 2021 of the brake shoe 2 tightly contacts the brake hub to complete the braking operation.

[0025] like Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, both ends of the return spring 4 are integrally provided with hooks, and the hooks are hooked on the spring hanging holes 2014 opened at the corresponding positions of the mounting seat 201. By utilizing the cooperation between the hooks at both ends and the spring hanging holes 2014, the return spring 4 is stably connected to the mounting seats 201 of the two brake shoes 2. After the driving cylinder 3 drives the brake shoe 2 to move, the brake shoe 2 is reset and the braking operation is canceled, thereby ensuring stable use.

[0026] Finally, it should be noted that the above description is only a preferred embodiment of the utility model and is not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A heavy truck drum brake, comprising a fixed base plate (1), a brake shoe (2), a drive cylinder (3) and a return spring (4), characterized in that: The mounting seat (201) of the brake shoe (2) is rotatably connected to the fixed base plate (1) via a rotating shaft, a driving cylinder (3) and a return spring (4) are arranged between the mounting seats (201), and a brake pad (2021) is integrally arranged on the arc-shaped base plate (202) arranged outside the mounting seat (201), a connecting ear (2023) on the arc-shaped base plate (202) is fixedly connected to the mounting seat (201) via a fixing bolt (204), and a rubber gasket (203) is arranged between the arc-shaped base plate (202) and the mounting seat (201).

2. A heavy truck drum brake according to claim 1, characterized in that: The outer side of the placement seat (201) is provided with a placement groove (2011) for fitting with the arc-shaped base plate (202); a brake pad (2021) on one side of the arc-shaped base plate (202) is provided with evenly distributed recessed grooves (2022); and a connecting ear (2023) and a limiting plug block (2024) are integrally provided on one side of the arc-shaped base plate (202) that is in contact with the placement seat (201); a through groove (2015) is provided at positions corresponding to the connecting ear (2023) and the limiting plug block (2024) on the placement seat (201); and the connecting ear (2023) passes through the through groove (2015) and is fixedly connected to the fixing bolt (204); the fixing bolt (204) is threadedly connected to a bolt seat (2012) provided on the placement seat (201); and the limiting plug block (2024) is provided in cooperation with the through groove (2015) at the corresponding position.

3. A heavy truck drum brake according to claim 1, characterized in that: One end of the driving cylinder (3) is rotatably connected to the rotating shaft via a connecting ring sleeve, and the other end of the driving cylinder (3) is rotatably connected to a rivet via a connecting ring sleeve, and the rivet is fixedly connected to a through hole (2013) opened on the placement seat (201).

4. A heavy truck drum brake according to claim 1, characterized in that: Both ends of the return spring (4) are integrally provided with hooks, and the hooks are hooked on spring hanging holes (2014) provided at corresponding positions of the placement seat (201).

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