Assembling fixture for brake chamber of heavy trailer

Abstract

The utility model discloses a heavy trailer brake chamber assembly fixture, which relates to the field of brake chamber assembly tools and comprises a toothed bar, an upper fixture and a lower fixture, the upper fixture and the lower fixture are used for clamping the front end face and the rear end face of a brake chamber, the upper fixture is fixed at the front end of the toothed bar, and the lower fixture is mounted on the toothed bar through a movable slider. The movable sliding block drives the lower clamp to move front and back through the ratchet mechanism so as to adjust the relative position between the upper clamp and the lower clamp. By designing the structures of the upper clamp, the lower clamp, the toothed bar and the movable sliding block, the tool reduces the labor intensity of maintenance personnel. Operators can easily and accurately assemble the brake chamber, and physical exhaustion and operation difficulty are reduced.

Description

Technical Field

[0001] The utility model relates to the field of brake chamber assembly tools, in particular to a heavy trailer brake chamber assembly fixture. Background Art

[0002] The brake chamber of a heavy-duty trailer is a key component in the braking system and comes in either single-chamber or dual-chamber configurations. While the chamber plays a crucial role in the braking system of trailers and trailer discs, frequent failures are common due to the system's frequent use. Disassembly and analysis revealed that the primary symptom of brake chamber failure is a damaged brake diaphragm. This problem is typically repaired by disassembling the brake chamber and replacing the damaged diaphragm.

[0003] During brake chamber repairs, the parking air brake cylinder spring's high preload presents significant challenges during assembly. To ensure safety, assembly must be performed on a press or bench vise, gradually compressing the spring until the mating surfaces—the front and rear end faces of the brake chamber and the brake diaphragm—are fully in contact and compressed. This ensures proper assembly of the chamber. Failure to strictly follow assembly procedures can lead to safety accidents.

[0004] Because the disassembly and repair of heavy-duty trailer brake chambers require specialized equipment (such as a press or bench vise), two maintenance personnel are typically required to work together to ensure safety. This process is not only cumbersome but also wastes human resources. Especially in the event of a sudden breakdown, with only one maintenance person available, or when specialized equipment is unavailable at the repair site, the disassembly and repair of the brake chamber becomes even more time-consuming and labor-intensive, significantly increasing safety risks. Utility Model Content

[0005] The purpose of the present utility model is to provide a heavy-duty trailer brake chamber assembly fixture to solve the problems raised in the above-mentioned background technology, so as to complete on-site maintenance without using special equipment, simplify the process flow, and realize single-person operation, thereby improving maintenance efficiency, reducing maintenance intensity, reducing maintenance personnel, and also improving the safety of maintenance operations.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solution: a heavy-duty trailer brake chamber assembly fixture, comprising a gear rod and an upper clamp and a lower clamp for clamping the front and rear end surfaces of the brake chamber, wherein the upper clamp is fixed to the front end of the gear rod, and the lower clamp is installed on the gear rod through a movable slider, and the movable slider drives the lower clamp to move forward and backward through a ratchet mechanism to adjust the relative position between the upper clamp and the lower clamp.

[0007] Preferably, the ratchet mechanism includes a shift block, a stop block, a ratchet and a control handle; the shift block is connected to the control handle and pushes the ratchet to roll, and the stop block cooperates with the ratchet and forms an opening and closing action under the rolling of the ratchet.

[0008] Preferably, the control handles are on opposite sides of the upper clamp and the lower clamp.

[0009] Preferably, the upper clamp and the lower clamp have the same structure.

[0010] Preferably, the upper clamp and the lower clamp are integrally formed into a U-shaped fork structure.

[0011] Preferably, the lower clamp is connected to the movable slider by welding.

[0012] Compared with existing technologies, the present invention offers the following advantages: the assembly tool eliminates the need for specialized equipment, such as a press or bench vise, simplifying the assembly and disassembly process for heavy-duty trailer brake chambers. The fixture structure and gear design allow for rapid assembly and disassembly of brake chambers, reducing the number of complex steps involved.

[0013] This assembly tool allows for single-person operation, eliminating the need for two maintenance personnel to work together as in traditional methods, significantly improving maintenance efficiency. The combination of the movable slider and ratchet mechanism makes operation more convenient and efficient.

[0014] By designing the structure of the upper and lower clamps, gear rods and movable slides, the tool reduces the labor intensity of maintenance personnel. Operators can easily and accurately assemble the brake chamber, reducing physical exertion and operating difficulty.

[0015] Traditional methods pose safety risks due to the high spring preload. This tool ensures safe operation through the coordination of a ratchet mechanism, a shift block, and a backstop, effectively preventing dangerous situations such as spring breakage.

[0016] This assembly tool is simple and portable, making it suitable for temporary repairs in various environments. Whether in the workshop or in the field, the tool can be quickly put into use in the event of a sudden failure, eliminating the need for a dedicated operating environment.

[0017] By enabling single-person operation and streamlining the process, the tool reduces the need for maintenance personnel, saving human resources and time costs, while also avoiding maintenance delays and additional costs caused by the lack of dedicated equipment.

[0018] In summary, the heavy-duty trailer brake chamber assembly fixture has significant beneficial effects in simplifying the maintenance process, improving efficiency, reducing strength, enhancing safety, and adapting to different maintenance environments, providing an efficient, safe, and convenient heavy-duty trailer brake chamber maintenance solution. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0020] In the figure: 1. Gear rod; 2. Upper clamp; 3. Lower clamp; 4. Moving slide; 5. Shift block; 6. Stop block; 7. Ratchet; 8. Control handle. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] The heavy-duty trailer brake chamber assembly fixture includes a gear rod 1, an upper clamp 2 and a lower clamp 3 for clamping, wherein the upper and lower clamps 3 are used to clamp the front and rear end faces of the brake chamber. The upper clamp 2 and the lower clamp 3 have the same structure, which is in the form of a U-shaped fork. The upper clamp 2 and the lower clamp 3 cooperate with the brake chamber end face structure to effectively press the front and rear end faces of the brake chamber while avoiding the brake push rod and the adjusting bolt, thereby ensuring that the brake chamber end cover moves stably during the assembly process and the joint surface position will not deviate, thereby avoiding the disadvantage of repeatedly adjusting the joint position when tightening with a bench vise.

[0023] The upper clamp 2 is fixed to the front end of the gear rod 1, and the lower clamp 3 is installed on the gear rod 1 through a movable slider 4. The movable slider 4 drives the lower clamp 3 to move back and forth through a ratchet mechanism to adjust the relative position between the upper clamp 2 and the lower clamp 3; wherein, the ratchet mechanism includes a shift block 5, a stop block 6, a ratchet 7 and a control handle 8; the shift block 5 is connected to the control handle 8 and pushes the ratchet 7 to roll, the stop block 6 cooperates with the ratchet 7 and forms an opening and closing action under the rolling of the ratchet 7; the control handle 8 is on the opposite side of the upper clamp 2 and the lower clamp 3.

[0024] In the above embodiment, the lower clamp 3 is welded to the movable slider 4 as a whole, the control handle 8 is pressed downward, and the ratchet 7 rolls and engages with the gear rod 1 through the gear teeth, so that the movable slider 4 is displaced up and down along the gear rod 1. The reciprocating motion of the control handle 8 is used to change the relative position between the upper clamp 2 and the lower clamp 3, thereby achieving the clamping of the front and rear end covers of the brake air chamber. When the lever 5 and the stop block 6 cooperate with the ratchet 7, the lever block 5 pushes the ratchet 7 to roll under the action of the control handle 8. At the same time, the stop block 6 forms a continuous opening and closing action under the rolling action of the ratchet 7. When the ratchet 7 stops rolling, the stop block 6 completes the last closing action, produces a locking effect on the ratchet 7, and completes the locking between the upper clamp 2 and the lower clamp 3; the control handle 8 is pushed up to a certain position, the lever block 5 presses the stop block 6 to release the lock of the stop block 6, and the control handle 8 continues to be pushed up, and the lever block 5 disengages from the ratchet 7 under the reverse action. At this time, the lever block 5 and the stop block 6 are disengaged from the ratchet 7, and the ratchet 7 can roll freely, thereby realizing the free movement of the movable slider 4 on the gear rod 1, thereby releasing the clamping force between the upper clamp 2 and the lower clamp 3.

[0025] When the entire heavy-duty trailer brake chamber assembly fixture is in use, the lower clamp 3 of the brake chamber disassembly and assembly tool is inserted into the outer edge surface of the rear cavity end cover of the brake chamber to be assembled, and the components of the brake chamber (front and rear cavities, brake diaphragm, push rod) are assembled in the installation order. The control handle 8 is pressed down. When the upper clamp 2 contacts the outer edge surface of the front cavity end cover of the brake chamber and produces a pressing effect, the relative positions of the components of the brake chamber are adjusted and continued to be pressed down. The upper clamp 2 descends to a certain position, and the front and rear cavity end faces of the brake chamber are fully in contact and pressed with the brake diaphragm. At this time, the retaining ring bolts are tightened to complete the assembly of the brake chamber.

[0026] The above is only a preferred specific implementation method of the present invention, but the protection scope of the present invention is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the present invention can make equivalent replacements or changes based on the technical solution and utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. Heavy-duty trailer brake chamber assembly fixture, characterized by: The invention comprises a gear rod (1) and an upper clamp (2) and a lower clamp (3) for clamping the front and rear end surfaces of the brake air chamber, wherein the upper clamp (2) is fixed to the front end of the gear rod (1), and the lower clamp (3) is installed on the gear rod (1) via a movable slider (4), and the movable slider (4) drives the lower clamp (3) to move forward and backward through a ratchet mechanism to adjust the relative position between the upper clamp (2) and the lower clamp (3).

2. The heavy-duty trailer brake chamber assembly fixture according to claim 1, characterized in that: The ratchet mechanism comprises a shift block (5), a stop block (6), a ratchet (7) and a control handle (8); the shift block (5) is connected to the control handle (8) and pushes the ratchet (7) to roll, and the stop block (6) cooperates with the ratchet (7) and forms an opening and closing action under the rolling of the ratchet (7).

3. The heavy-duty trailer brake chamber assembly fixture according to claim 2, characterized in that: The control handle (8) is on opposite sides of the upper clamp (2) and the lower clamp (3).

4. The heavy-duty trailer brake chamber assembly fixture according to claim 1, characterized in that: The upper clamp (2) and the lower clamp (3) have the same structure.

5. The heavy-duty trailer brake chamber assembly fixture according to claim 4, characterized in that: The upper clamp (2) and the lower clamp (3) are integrally formed into a U-shaped fork structure.

6. The heavy-duty trailer brake chamber assembly fixture according to claim 1, characterized in that: The lower clamp (3) is welded to the movable slider (4).

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