A split pin dismounting tool for UIC brake pad replacement

Abstract

The utility model discloses an open pin dismounting tool for UIC brake pad replacement belongs to component dismounting technical field. The open pin dismounting tool provided by the utility model, including frock body, H type split pin department and tow department, H type split pin department includes first split pin department and second split pin department, its internal clearance is matched with the tail portion of open pin to be dismounted, and the clearance of the clamping groove structure of tow department is matched with the head of open pin to be dismounted, when dismounting, first split pin department is matched with open pin tail portion, and the tail end of open pin is reset with force upward, after resetting, the head of open pin is clamped tightly using tow department, and open pin is taken out by pulling down, when installing, second split pin department is matched with open pin tail portion, and the tail end of open pin is bent by sending force downward. Adopt the open pin dismounting tool provided by the utility model, can be accurately operated to open pin in the narrow space, solve the problem that the prior art is difficult to operate in the narrow space, improve the convenience and efficiency of dismounting.

Description

Technical Field

[0001] This utility model relates to the field of component disassembly and assembly technology, specifically to a cotter pin disassembly and assembly tool for replacing UIC brake pads. Background Technology

[0002] In the safety assurance system for high-speed train operation, the UIC brake pads used in the CRH2G train have undergone secondary protection modifications, innovatively incorporating a cotter pin structure to enhance the safety redundancy of the braking system. This technological upgrade effectively avoids the risk of brake pad detachment under high-frequency vibration conditions, reduces operational safety hazards caused by brake component failure, and provides a solid guarantee for the safe operation of the train. However, while the addition of cotter pins improves safety, it also presents new challenges to the daily maintenance of the brake pads.

[0003] The current UIC brake pad replacement process for CRH2G EMUs relies on multi-tool collaboration and requires complex operations to be completed within extremely limited maintenance space. Workers must use pliers, hammers, and screwdrivers to precisely reposition the old cotter pin to its initial position before pulling it out of the pin hole. When installing the new cotter pin, pliers are used to fold the tail pin axially, and the hammer is repeatedly used to ensure a tight fit between the cotter pin and the brake pad support, forming an anti-loosening structure. This traditional method not only demands a high level of operator skill and spatial awareness but also, due to the confined working environment, easily leads to inconvenient tool use and cumbersome procedures, significantly extending maintenance time and severely hindering the overall efficiency of EMU maintenance.

[0004] Therefore, how to achieve rapid and accurate disassembly and installation of cotter pins has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] The purpose of this utility model is to provide a cotter pin removal and installation tool for UIC brake pad replacement, so as to overcome the problem of difficulty in replacing UIC brake pads due to operation in a confined space in the prior art.

[0006] The present invention solves the above-mentioned technical problems through the following technical solution:

[0007] A cotter pin removal and installation tool for UIC brake pad replacement includes a tool body, an H-shaped splitting pin section, and a pulling part; the H-shaped splitting pin section includes a first horizontal section, a second horizontal section, and a vertical section connected sequentially from top to bottom; on one side of the vertical section, the first horizontal section is shorter than the second horizontal section, forming the first splitting pin section; on the other side of the vertical section, the first horizontal section is longer than the second horizontal section, forming the second splitting pin section; the internal gap between the first splitting pin section and the second splitting pin section matches the tail of the cotter pin to be removed; the bottom of the second horizontal section is fixedly connected to the upper end of the tool body;

[0008] The drag section has a slot structure with the opening direction of the slot structure parallel to the first horizontal section. The bottom of the slot structure is fixedly connected to one side of the bottom of the tooling body. The other side of the bottom of the tooling body is provided with an arc-shaped chamfer. The gap of the slot structure matches the head of the cotter pin to be disassembled.

[0009] A further improvement of this utility model is that the tooling body is provided with several through holes.

[0010] A further improvement of this utility model is that the cross-section of the through hole is one of a circle, a square, a rectangle or an ellipse, and is evenly distributed along the vertical direction of the tooling body.

[0011] A further improvement of this utility model is that the internal gap between the first splitting pin and the second splitting pin matches the tail of the cotter pin to be disassembled, specifically as follows:

[0012] The height of the internal gap between the first and second split pins is 1 to 1.2 times the thickness of the tail of the cotter pin to be disassembled.

[0013] A further improvement of this utility model is that the gap of the slot structure matches the head of the cotter pin to be disassembled specifically as follows:

[0014] The clearance height of the slot structure is 1 to 1.2 times the head thickness of the cotter pin to be disassembled.

[0015] A further improvement of this utility model is that the surface of the tooling body is provided with a wavy anti-slip texture.

[0016] A further improvement of this utility model is that the tooling body is made of one of stainless steel, aluminum alloy or titanium alloy.

[0017] A further improvement of this utility model is that the material of the H-shaped split pin is one of stainless steel, aluminum alloy or titanium alloy.

[0018] A further improvement of this utility model is that the material of the towing part is one of stainless steel, aluminum alloy or titanium alloy.

[0019] A further improvement of this utility model is that the tooling body, the H-shaped splitting pin, and the dragging part are integrally formed.

[0020] Compared with the prior art, the positive and progressive effects of this utility model are as follows:

[0021] This utility model provides a cotter pin removal and installation tool for UIC brake pad replacement, comprising a tool body, an H-shaped splitting pin section, and a pulling part. The H-shaped splitting pin section includes a first splitting pin section and a second splitting pin section, the internal gap of which matches the tail of the cotter pin to be removed. The slot structure gap of the pulling part matches the head of the cotter pin to be removed. During removal, the first splitting pin section is aligned with the tail of the cotter pin, and upward force is applied to reset the tail of the cotter pin. After reset, the pulling part is used to clamp the head of the cotter pin, and the cotter pin is pulled downward to remove it. During installation, the second splitting pin section is aligned with the tail of the cotter pin, and downward force is applied to bend the tail of the cotter pin. Using this cotter pin removal and installation tool, precise operation of the cotter pin can be achieved in confined spaces, solving the problem of difficulty in operation in confined spaces in existing technologies, and improving the convenience and efficiency of removal.

[0022] Furthermore, the through-hole design allows for the removal of some material while maintaining the basic structural strength of the tooling body, thereby effectively reducing the overall weight of the tooling and making it easier and more convenient for operators to disassemble and assemble the UIC brake pad cotter pins.

[0023] Furthermore, when the through holes are evenly distributed along the vertical direction of the tooling body, the structural strength of the tooling body can be more uniform and reasonable. This can avoid stress concentration caused by excessive or insufficient local material, allowing the various parts of the tooling to share the load more evenly when subjected to external forces, thereby improving the overall durability and reliability of the tooling and extending its service life.

[0024] Furthermore, the wavy anti-slip texture can effectively increase the friction between the tooling body and the operator's hand. When performing the disassembly and assembly of cotter pins, the operator can hold the tooling more firmly and prevent it from slipping in their hand, thereby improving the accuracy and safety of the operation. Attached Figure Description

[0025] The accompanying drawings are provided to further illustrate the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention.

[0026] Figure 1 This is a schematic diagram of the cotter pin disassembly and assembly tool for replacing UIC brake pads according to the present invention;

[0027] Figure 2 This is a front view of the first splitting pin and the second splitting pin of this utility model.

[0028] Wherein, 1 is the first horizontal part; 2 is the vertical part; 3 is the second horizontal part; 4 is the tooling body; 5 is the dragging part; 6 is the through hole; 7 is the first splitting pin part; and 8 is the second splitting pin part. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0031] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0032] In the description of the embodiments of this utility model, it should be noted that if terms such as "upper," "lower," "horizontal," or "inner" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use, they are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the utility model. Furthermore, terms such as "first" and "second" are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0033] Furthermore, the use of the term "horizontal" does not imply that the component must be absolutely horizontal, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0034] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0035] The present invention will be further described in detail below with reference to the accompanying drawings. The description is intended to explain the present invention and not to limit it.

[0036] See Figure 1 and Figure 2 A cotter pin removal and installation tool for UIC brake pad replacement includes a tool body 4, an H-shaped split pin section, and a dragging section 5. The H-shaped split pin section includes a first horizontal section 1, a second horizontal section 3, and a vertical section 2 connected sequentially from top to bottom. On one side of the vertical section 2, the first horizontal section 1 is shorter than the second horizontal section 3, forming a first split pin section 7. On the other side of the vertical section 2, the first horizontal section 1 is longer than the second horizontal section 3, forming a second split pin section 8. The internal gap between the first split pin section 7 and the second split pin section 8 matches the tail of the cotter pin to be removed. The bottom of the second horizontal section 3 is fixedly connected to the upper end of the tool body 4.

[0037] The drag section 5 is a slot structure. The opening direction of the slot structure is parallel to the first horizontal section 1. The bottom of the slot structure is fixedly connected to one side of the bottom of the tooling body 4. The other side of the bottom of the tooling body 4 is provided with an arc-shaped chamfer. The gap of the slot structure matches the head of the cotter pin to be disassembled.

[0038] During disassembly, the first split pin 7 is matched with the tail of the cotter pin. After the slot is locked in place, upward force is applied to reset the tail of the cotter pin using the lever principle. Once both ends of the cotter pin are reset and flat, the dragging part 5 is used to lock the head of the cotter pin and pull it downward to remove it. During installation, the second split pin 8 is matched with the tail of the cotter pin. After locking in place, downward force is applied to bend the tail of the cotter pin using the lever principle, making it fit tightly against the brake pad support, thus forming a reliable anti-loosening and fastening state. By making full use of the lever principle, the disassembly and assembly of the UIC brake pad cotter pin can be completed in a confined space, greatly improving maintenance efficiency. The time required to replace a single brake pad has been reduced from 6 minutes to 2 minutes, an efficiency increase of 200%.

[0039] The cotter pin disassembly and assembly tool provided by this utility model enables precise operation of cotter pins in confined spaces, solving the problem of difficulty in operation in confined spaces in the prior art, and improving the convenience and efficiency of disassembly.

[0040] Specifically, the tooling body 4 is provided with several through holes 6; the through holes can remove some material while ensuring the basic structural strength of the tooling body, thereby effectively reducing the overall weight of the tooling and making it easier and more convenient for operators to disassemble and assemble the UIC brake pad cotter pin.

[0041] Specifically, the cross-section of the through hole 6 is one of a circle, square, rectangle or ellipse, and is evenly distributed along the vertical direction of the tooling body 4. When the through holes are evenly distributed along the vertical direction of the tooling body, the structural strength of the tooling body is more uniform and reasonable, which can avoid stress concentration caused by too much or too little material in some areas. When the tooling is subjected to external forces, each part can more evenly distribute the load, thereby improving the overall durability and reliability of the tooling and extending its service life.

[0042] Specifically, the internal clearance between the first split pin 7 and the second split pin 8 matches the tail of the cotter pin to be disassembled as follows:

[0043] The height of the internal gap between the first split pin 7 and the second split pin 8 is 1 to 1.2 times the thickness of the tail of the cotter pin to be disassembled.

[0044] Specifically, the gap of the slot structure matches the head of the cotter pin to be disassembled as follows:

[0045] The clearance height of the slot structure is 1 to 1.2 times the head thickness of the cotter pin to be disassembled.

[0046] Specifically, the surface of the tooling body 4 is provided with a wave-shaped anti-slip texture; the wave-shaped anti-slip texture can effectively increase the friction between the tooling body and the operator's hand, so that when performing the disassembly and assembly of cotter pins, the operator can hold the tooling more firmly and prevent the tooling from slipping in the hand, thereby improving the accuracy and safety of the operation.

[0047] Specifically, the tooling body 4 is made of one of stainless steel, aluminum alloy or titanium alloy.

[0048] Specifically, the H-shaped split pin is made of one of stainless steel, aluminum alloy, or titanium alloy.

[0049] Specifically, the material of the towing part 5 is one of stainless steel, aluminum alloy or titanium alloy.

[0050] Specifically, the tooling body 4, the H-shaped splitting pin, and the dragging part 5 are integrally formed structures.

[0051] Finally, it should be noted that the embodiments listed above are merely one or more specific manifestations of the technical solution of this utility model. Their purpose is to clearly illustrate the concept, principle, and application of this utility model through specific examples, and is by no means intended to limit the scope of protection of this utility model to these specific embodiments. In fact, the true value of this utility model lies in its proposed technical ideas and innovations, rather than its manifestations or implementation methods.

[0052] For those skilled in the art, after thoroughly reading and understanding the technical solution of this utility model, they are fully capable of making various changes, modifications, or equivalent substitutions to the specific embodiments of the utility model based on their own professional knowledge and skills. These changes may include, but are not limited to: adjusting the range of technical parameters, optimizing the algorithm flow to improve efficiency, and replacing some technical components to achieve better compatibility or reduce costs. As long as these modified technical solutions substantially retain the technical features claimed by the original utility model, that is, they can still achieve the core functions and effects of this utility model, then these changes should be considered to fall within the scope of protection of the pending claims of this utility model.

[0053] Furthermore, with the continuous progress and development of technology, new technical means and methods are constantly emerging, which provides ample space for the further improvement and perfection of this utility model. Therefore, the scope of protection of this utility model should also include reasonable and foresightful improvements and extensions based on existing technology. As long as these improvements and extensions do not deviate from the basic principles and core concept of this utility model, they should be regarded as equivalents of this utility model and are equally protected by patent rights.

Claims

1. A cotter pin removal and installation tool for replacing UIC brake pads, characterized in that, The tooling includes a tooling body (4), an H-shaped split pin, and a dragging part (5). The H-shaped split pin includes a first horizontal part (1), a second horizontal part (3), and a vertical part (2) connected from top to bottom. On one side of the vertical part (2), the first horizontal part (1) is shorter than the second horizontal part (3), forming the first split pin (7). On the other side of the vertical part (2), the first horizontal part (1) is longer than the second horizontal part (3), forming the second split pin (8). The internal gap between the first split pin (7) and the second split pin (8) matches the tail of the cotter pin to be disassembled. The bottom of the second horizontal part (3) is fixedly connected to the upper end of the tooling body (4). The drag section (5) is a slot structure. The opening direction of the slot structure is parallel to the first horizontal section (1). The bottom of the slot structure is fixedly connected to one side of the bottom of the tool body (4). The other side of the bottom of the tool body (4) is provided with an arc chamfer. The gap of the slot structure matches the head of the cotter pin to be disassembled.

2. The cotter pin removal and installation tool for UIC brake pad replacement according to claim 1, characterized in that, The tooling body (4) is provided with several through holes (6).

3. The cotter pin removal and installation tool for UIC brake pad replacement according to claim 2, characterized in that, The cross-section of the through hole (6) is one of a circle, a square, a rectangle or an ellipse, and is distributed at equal intervals along the vertical direction of the tooling body (4).

4. The cotter pin removal and installation tool for UIC brake pad replacement according to claim 1, characterized in that, The internal clearance between the first split pin (7) and the second split pin (8) matches the tail of the cotter pin to be disassembled as follows: The height of the internal gap between the first split pin (7) and the second split pin (8) is 1 to 1.2 times the thickness of the tail of the cotter pin to be disassembled.

5. A cotter pin removal and installation tool for UIC brake pad replacement according to claim 1, characterized in that, Specifically, the gap of the slot structure matches the head of the cotter pin to be disassembled as follows: The clearance height of the slot structure is 1 to 1.2 times the head thickness of the cotter pin to be disassembled.

6. A cotter pin removal and installation tool for UIC brake pad replacement according to claim 1, characterized in that, The surface of the tool body (4) is provided with a wave-shaped anti-slip texture.

7. A cotter pin removal and installation tool for UIC brake pad replacement according to claim 1, characterized in that, The tooling body (4) is made of stainless steel, aluminum alloy or titanium alloy.

8. A cotter pin removal and installation tool for UIC brake pad replacement according to claim 1, characterized in that, The H-shaped split pin is made of one of stainless steel, aluminum alloy or titanium alloy.

9. A cotter pin removal and installation tool for UIC brake pad replacement according to claim 1, characterized in that, The material of the towing part (5) is one of stainless steel, aluminum alloy or titanium alloy.

10. A cotter pin removal and installation tool for UIC brake pad replacement according to claim 1, characterized in that, The tooling body (4), the H-shaped splitting pin and the dragging part (5) are integrally formed structures.

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