A wet brake assembly structure

Abstract

The utility model relates to wet brake technical field, and disclose a kind of wet brake assembly structure, solve the structure design of existing wet brake hub shell unreasonable, its processing is complicated, increase process manufacturing cost, and the disassembly is very inconvenient when damaging, it includes transmission box, the lower part of transmission box is detachably connected brake connecting shell by bolt, brake connecting shell inner chamber inserts end transmission gear, the outside of brake connecting shell is provided with brake hub shell, brake hub shell is alternately stacked and installed brake steel sheet and brake friction disc, the outside of brake steel sheet and brake friction disc is fixed by brake cover plate axial compression, the joint surface of transmission box and brake connecting shell is provided with sealing ring;Through the integral assembly of brake hub shell assembly, realize quick disassembly, reduce single component disassembly time;The fixed laminated sequence of friction pair avoids repositioning, significantly reduces maintenance complexity.

Description

Technical Field

[0001] This utility model belongs to the technical field of wet brakes, specifically a wet brake assembly structure. Background Technology

[0002] A wet brake is a device that achieves braking function through oil cooling and lubrication. It is mainly used in high-load, frequent braking scenarios (such as construction machinery and heavy vehicles). Its core structure consists of alternating layers of brake steel pads and friction discs, all of which are immersed in a closed oil chamber. During braking, hydraulic or mechanical force is used to press the friction pads and steel pads together, using friction to convert kinetic energy into heat energy. At the same time, the circulating oil continuously carries away heat and lubricates the contact surfaces, effectively avoiding overheating and wear caused by dry friction.

[0003] Tractors operate in complex environments. When the brake hub housing is damaged after long-term use and needs to be disassembled for repair or replacement, the brake cover plate must be removed first, then the brake pads and brake friction discs must be removed, and then the sealing cover and bolts must be removed. In addition, the large end gear in the transmission box will also hinder the disassembly of the hub housing. Therefore, the large end gear must also be removed before the brake hub housing can be completely removed. The disassembly process is quite complicated.

[0004] The wet brake hub housing is mounted to the transmission housing with four bolts. Four sealing caps and O-rings are installed on the bolt sides to prevent oil from leaking out of the housing. Because the four holes in the brake hub housing and the sealing caps are precision-fitted, the four holes in the brake hub housing need to be drilled and then milled during processing, which requires high process requirements and is complicated. In addition, O-ring grooves need to be machined on the four sealing caps, which also greatly increases the manufacturing cost.

[0005] Because there are four bolt holes inside the wet brake hub housing, the brake friction disc cannot directly contact it. Therefore, an additional brake pad must be installed, which not only increases production costs but also wastes space inside the brake hub housing. Utility Model Content

[0006] In view of the above situation and to overcome the defects of the prior art, this utility model provides a wet brake assembly structure, which effectively solves the problems of unreasonable structural design of existing wet brake hub housings, complicated processing, increased manufacturing costs, and inconvenient disassembly when damaged.

[0007] To achieve the above objectives, this utility model provides the following technical solution: a wet brake assembly structure, including a transmission housing, the lower part of which is detachably connected to a brake connecting shell by bolts, a large end-drive gear is embedded in the inner cavity of the brake connecting shell, a brake hub shell is provided on the outside of the brake connecting shell, brake steel pads and brake friction discs are alternately stacked and installed inside the brake hub shell, the outer sides of the brake steel pads and brake friction discs are axially pressed and fixed by a brake cover plate, and a sealing ring is provided on the mating surface of the transmission housing and the brake connecting shell.

[0008] Preferably, the brake pad substrate is made of high-quality carbon structural steel, the surface of the brake pad is hardened and wear-resistant, the brake friction disc is made of copper-based powder metallurgy material, the braking engagement and disengagement are achieved by the rotation of the pressure plate, the brake cover is provided with an oil injection channel and an oil level observation window, and the oil injection channel connects the brake chamber and the transmission housing oil sump.

[0009] Preferably, the output shaft torque is transmitted through gear meshing on the outer side of the large end-drive gear, the gear teeth of the large end-drive gear are carburized and quenched, and a magnetic drain plug is provided at the bottom of the transmission housing.

[0010] Preferably, the brake connecting shell is provided with heat dissipation fins.

[0011] Preferably, the bolts are made of symmetrically distributed high-strength alloy steel and are equipped with spring washers to prevent loosening.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] (1) The brake hub housing assembly is assembled as a whole, which enables quick disassembly and reduces the disassembly time of a single part; the fixed stacking sequence of the friction pair avoids misalignment during reassembly, significantly reducing maintenance complexity and making it suitable for high-frequency maintenance scenarios.

[0014] (2) The symmetrical distribution of bolts and spring washers ensures stable connection rigidity during disassembly and prevents the risk of bolt breakage; the step-by-step disassembly design of the rotary seal ring and cover plate sealing structure facilitates the partial replacement of vulnerable parts, avoids the overall scrapping of the shell, and reduces maintenance costs. Attached Figure Description

[0015] The accompanying drawings are provided to further understand the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation thereof.

[0016] In the attached diagram:

[0017] Figure 1 This is a schematic diagram of the existing wet brake assembly structure;

[0018] Figure 2This is a schematic diagram of the assembly structure of the wet brake of this utility model;

[0019] In the diagram: 1. Transmission housing; 2. Brake connecting housing; 3. End-drive large gear; 4. Brake hub housing; 5. Brake steel pads; 6. Brake friction disc; 7. Brake cover plate; 8. Bolt; 9. Pressure plate. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0021] Depend on Figure 2 The present invention includes a transmission housing 1, the lower part of which is detachably connected to a brake connecting shell 2 by bolts 8. A large end transmission gear 3 is embedded in the inner cavity of the brake connecting shell 2. The large transmission gear 3 is linked to an external transmission shaft through a spline. A brake hub shell 4 is provided on the outside of the brake connecting shell 2. Brake steel pads 5 and brake friction discs 6 are alternately stacked in the brake hub shell 4 to form a wet multi-disc brake assembly. The outer sides of the brake steel pads 5 and brake friction discs 6 are axially pressed and fixed by a brake cover plate 7. A sealing ring is provided on the mating surface of the transmission housing 1 and the brake connecting shell 2 to prevent lubricating oil leakage.

[0022] The brake pad 5 is made of high-quality carbon structural steel, and the surface of the brake pad is hardened and wear-resistant. The brake friction disc 6 is made of copper-based powder metallurgy material. Braking engagement and disengagement are achieved by rotating the pressure disc 9. The brake cover plate 7 is equipped with an oil injection channel and an oil level observation window. The oil injection channel connects the brake chamber and the transmission housing oil sump to achieve lubricating oil circulation. The bolts 8 are made of symmetrically distributed high-strength alloy steel material. The connection rigidity is ensured by controlling the preload, and spring washers are configured to prevent loosening.

[0023] During disassembly, the operator first removes the fixing screws of the brake cover plate 7 and removes the cover plate to expose the internal brake components. Then, using a puller, the operator applies force evenly to pull the brake hub housing 4, along with the stacked brake pads 5 and brake friction discs 6, out of the brake connecting housing 2 as a whole. The friction pair components are arranged in order to avoid incorrect reassembly. The symmetrically distributed bolts 8 between the transmission housing 1 and the brake connecting housing 2 are removed, and the two housings are gently tapped apart to quickly complete the disassembly.

[0024] The output shaft torque is transmitted through gear meshing on the outer side of the large end drive gear 3. The gear teeth of the large end drive gear 3 are carburized and quenched. A magnetic drain plug is installed at the bottom of the transmission housing 1.

[0025] The brake connecting housing 2 is equipped with heat dissipation fins to dissipate braking heat through forced oil circulation or natural convection.

Claims

1. A wet brake assembly structure, comprising a transmission housing (1), characterized in that: The lower part of the transmission housing (1) is detachably connected to the brake connecting shell (2) by bolts (8). The end transmission gear (3) is embedded in the inner cavity of the brake connecting shell (2). The brake hub shell (4) is provided on the outside of the brake connecting shell (2). Brake steel pads (5) and brake friction discs (6) are alternately stacked in the brake hub shell (4). The outer sides of the brake steel pads (5) and brake friction discs (6) are axially pressed and fixed by the brake cover plate (7). A sealing ring is provided on the mating surface of the transmission housing (1) and the brake connecting shell (2).

2. The wet brake assembly structure according to claim 1, characterized in that: The base of the brake steel sheet (5) is high-quality carbon structural steel. The surface of the brake steel sheet (5) is hardened and wear-resistant. The brake friction disc (6) is made of copper-based powder metallurgy material. Braking engagement and disengagement are achieved by rotating the pressure plate (9). The brake cover plate (7) is provided with an oil injection channel and an oil level observation window. The oil injection channel connects the brake chamber and the transmission housing oil sump.

3. The wet brake assembly structure according to claim 1, characterized in that: The output shaft torque is transmitted through gear meshing on the outer side of the large end drive gear (3). The gear teeth of the large end drive gear (3) are carburized and quenched. A magnetic drain plug is provided at the bottom of the transmission housing (1).

4. The wet brake assembly structure according to claim 1, characterized in that: The brake connecting shell (2) is provided with heat dissipation fins.

5. The wet brake assembly structure according to claim 1, characterized in that: The bolts (8) are made of symmetrically distributed high-strength alloy steel and are equipped with spring washers to prevent loosening.

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