Large-tonnage drive axle with central brake

Abstract

The large-tonnage drive axle with the central brake comprises a main speed reducer, an axle housing, a hub brake disc assembly, a brake caliper and an air chamber, the main speed reducer, a support and the central brake are installed in the center of the axle housing, the hub brake disc assembly and the brake caliper are installed at the two ends of the axle housing respectively, and the air chamber is arranged on the brake caliper. The device is characterized in that the main reducer is provided with a support and a central brake; a central brake is adopted, so that the braking torque of an axle is increased, and the problems of vehicle landslide, tire abrasion, endangering of life safety of a driver and use safety of the vehicle and the like caused by insufficient parking braking force when the vehicle is parked on a slope road section are solved; the parking braking torque is increased through the application of the central brake, the safety of the vehicle parking on the slope can be guaranteed, full braking is achieved, the problem caused by insufficient parking braking force is solved, and the stability and reliability of the whole vehicle parking on the slope road section are guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts, in particular to a large-tonnage drive axle with a central brake. Background Art

[0002] As mining vehicles develop towards larger tonnage, they are restricted by mining road conditions and need to meet the requirements of reliable braking when fully loaded uphill and downhill at a speed of 30 km / h. Figure 1 As shown, the conventional drive axle includes a main reducer 1, a bridge housing 2, an air chamber 3, a brake caliper 4, and a wheel hub brake disc assembly 5. The conventional drive axle braking is achieved by the driver stepping on the brake to cause the air chamber to push the brake caliper and the wheel hub brake disc assembly to generate friction, thereby slowing down the wheels until they stop rotating. When the vehicle is parked on a slope, the vehicle is subjected to a downward force along the slope, and the braking force requirement is bound to increase based on the conventional drive axle.

[0003] At present, for large-tonnage drive axles, when fully loaded, the braking torque provided by the axle can only meet the braking torque requirements of the vehicle when driving on a flat road, and the braking torque is insufficient when driving on a certain slope; to increase the braking torque, it is necessary to increase the wheel-end air chamber specifications or increase the braking radius of the wheel hub brake disc; due to the limitations of the air chamber specifications on the market, the air chamber specifications cannot be increased; only the braking radius of the wheel hub brake disc can be increased, which is also unable to meet the braking requirements due to the limitations of the frame and tire specifications. If the braking force is insufficient, it will cause the vehicle's braking distance to increase, landslide, and lead to wheel drag, brake failure, collision and other faults, endangering life and property safety. Utility Model Content

[0004] The purpose of the utility model is to overcome the shortcomings of the above-mentioned prior art and provide a large-tonnage drive axle with a central brake.

[0005] The technical solution provided by the utility model is: a large-tonnage drive axle with a central brake, comprising a main reducer, a bridge housing, an air chamber, a brake caliper, and a wheel hub brake disc assembly; the main reducer is arranged at the center of the bridge housing, and wheel hub brake disc assemblies are arranged at both ends of the bridge housing respectively, and a brake caliper is arranged on the wheel hub brake disc assembly, and the two cooperate with each other, and an air chamber is arranged on the brake caliper; it is characterized in that a bracket and a central brake are arranged on the main reducer; the central brake is composed of a central brake disc, a central brake caliper, and a central brake air chamber; the central brake disc is installed on the main reducer, and the central brake caliper is installed on the bracket after cooperating with the central brake disc, and a central brake air chamber is arranged on the central brake caliper.

[0006] Furthermore, the braking torque of the central brake is 4800 N.m.

[0007] Furthermore, the central brake disc is directly mounted on the input end of the final reducer 1 .

[0008] Beneficial effects of the utility model:

[0009] 1. The central brake is used to reduce the specifications of the wheel-end brakes, which can match the tires of common specifications and reduce the cost of later maintenance of tires;

[0010] 2. The application of the central brake solves the problem of insufficient braking force, avoids vehicle failures such as increased braking distance, landslides, wheel dragging, brake failure, and crashes caused by insufficient braking force, and increases the service life of the drive axle and tires;

[0011] 3. The structure is compact. It does not affect the frame layout, does not increase the tire specifications, and does not affect the vehicle's braking on slopes. At the same time, it can obtain a larger wheel braking torque, ensuring the stability and reliability of the braking of the entire vehicle throughout its life cycle. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the existing drive axle structure;

[0013] Figure 2 It is a structural schematic diagram of the utility model;

[0014] Figure 3 It is a structural schematic diagram of the central brake of the utility model.

[0015] In the figure, 1. main reducer, 2. bridge housing, 3. air chamber, 4. brake caliper, 5. wheel hub brake disc assembly, 6. central brake, 7. bracket. DETAILED DESCRIPTION

[0016] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings.

[0017] like Figure 2 , 3As shown, a large-tonnage drive axle with a central brake is composed of a main reducer 1, a bridge housing 2, an air chamber 3, a brake caliper 4, a wheel hub brake disc assembly 5, a central brake 6 and a bracket 7; the size of the wheel hub brake disc assembly 5 is adapted to the tire specification 18.00R25 commonly used in the market; the central brake 6 is composed of a central brake disc 61, a central brake caliper 62, and a central brake air chamber 63; with the bridge housing 2 as the base, the main reducer 1 is installed at the center of the bridge housing 2, the brake caliper 4 is matched with the wheel hub brake disc assembly 5 and then installed at both ends of the bridge housing 2, and the air chamber 3 is installed on the brake caliper 4 at the wheel end; The bracket 7 and the central brake 6 are installed on the shell of the main reducer 1, and the central brake disc 61 is directly installed on the input end of the main reducer 1. The parking brake torque of 4800N·m is increased at the input end of the drive axle. While ensuring the braking effectiveness, the braking force arm is reduced. The structure is compact and the interference between the central brake and the frame is avoided to ensure reliable braking of the vehicle. The central brake caliper 62 of the central brake 6 is installed on the bracket 7. During installation, the central brake caliper 62 is first matched with the central brake disc 61, and then the central brake caliper 62 is fastened to the bracket 7, and finally the central brake air chamber 63 is installed on the central brake caliper 62.

[0018] The utility model discloses a large-tonnage drive axle with a central brake. When working, the main reducer receives the power transmitted by the engine, and transmits the power to the wheel hub brake disc assemblies 5 at both ends of the bridge housing through the internal gear system, so as to drive the wheels to rotate; when the vehicle brakes, the air chambers 3 at both ends push the brake calipers 4 to rub against the wheel hub brake disc assemblies 5, so as to generate braking force, so as to slow the vehicle down to a low speed or stop the vehicle, and then the central brake 6 is started, and the central brake air chamber 63 of the central brake 6 pushes the central brake caliper 62 to rub against the central brake disc 61, so as to generate braking torque at the input end of the main reducer, so as to meet the braking requirements of the whole vehicle and make the vehicle brake reliable.

[0019] The utility model has a compact structure. By adding a central brake and increasing the braking torque, the braking force of the vehicle can be guaranteed when parking on a slope, and the stable and reliable braking of the entire axle throughout its life cycle can be guaranteed. At the same time, through the application of the central brake, the increase of the wheel-end braking mechanism is effectively avoided, and tires of commonly used specifications on the market can be fully applied, thereby reducing the cost of later repair and maintenance of the vehicle and increasing the service life of the drive axle.

[0020] The above description is only for the implementation mode of the utility model, and does not limit the patent scope of the utility model. Any equivalent structure or equivalent process transformation made by using the contents of the utility model specification and drawings, or directly or indirectly used in other related technical fields, are also included in the patent protection scope of the utility model.

Claims

1. A large-tonnage drive axle with a central brake, comprising a main reducer (1), a bridge housing (2), an air chamber (3), a brake caliper (4), and a wheel hub brake disc assembly (5); the main reducer (1) is arranged at the center of the bridge housing (2), wheel hub brake disc assemblies (5) are arranged at both ends of the bridge housing (2), a brake caliper (4) is arranged on the wheel hub brake disc assembly (5), the two cooperate with each other, and the brake caliper (4) is arranged on the air chamber (3); the characteristics are as follows: The main reducer (1) is provided with a bracket (7) and a central brake (6); the central brake (6) is composed of a central brake disc (61), a central brake caliper (62), and a central brake air chamber (63); the central brake disc (61) is mounted on the main reducer (1), the central brake caliper (62) is mounted on the bracket (7) after being matched with the central brake disc (61), and the central brake caliper (62) is provided with a central brake air chamber (63).

2. A large-tonnage drive axle with a central brake according to claim 1, characterized in that: The braking torque of the central brake (6) is 4800 Nm.

3. A large-tonnage drive axle with a central brake according to claim 1, characterized in that: The central brake disc (61) is directly mounted on the input end of the main reducer (1).

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