Cotter pin bending tool

Abstract

The utility model discloses a cotter pin bending tool, which comprises a bending pipe, one end of the bending pipe is half-sectioned along the axis to form an arc-shaped groove plate, two side edges of the arc-shaped groove plate are symmetrically and fixedly provided with lug blocks, an inserting rod is fixedly arranged between the two lug blocks in a penetrating manner, and the inserting rod is perpendicular to the axis of the bending pipe; the whole grab handle is cylindrical, and the other end of the bent pipe is detachably inserted into the grab handle along the axis of the grab handle. The end of the arc-shaped groove plate abuts against the root portions of the pin legs of the cotter pin, the inserting rod is inserted between the two pin legs, clamping of one pin leg is achieved, the grab handle is pulled to drive the bending pipe to rotate integrally, the pin legs of the cotter pin are bent from the root portions according to the lever principle, time and labor are saved, the pin legs are not prone to slipping in the bending process, and the bending efficiency of the cotter pin is improved. The safety of a user is ensured; the grab handle and the bending pipe are arranged in a detachable mode, when cotter pins of different positions and types are bent, the bending pipes of different sizes can be replaced, and the use range of the cotter pin bending device is widened.

Description

Technical Field

[0001] This utility model relates to the field of cotter pin installation technology, specifically to a cotter pin bending fixture. Background Technology

[0002] During the maintenance of rail vehicles, it is necessary to disassemble and reassemble cotter pins in many places on the vehicle. For example, cotter pins are widely used in anti-roll torsion bars on bogies, traction rods, various connecting components in the braking system, and coupler buffer devices to ensure the safety and reliability of mechanical connections. As an important safety component, cotter pins play an irreplaceable role in ensuring the normal operation of the vehicle and the safety of passengers.

[0003] Traditionally, cotter pins are opened using pliers. However, for some thicker and harder cotter pins, such as safety cable cotter pins, height valve stem cotter pins, and high-strength cotter pins used in suspension systems, opening them with pliers becomes extremely difficult. Especially when dealing with short pin legs, excessive force can cause the pliers to slip, increasing the difficulty of operation and potentially leading to hand injuries or cuts, posing a significant safety hazard. This method is labor-intensive and relatively inefficient, especially when dealing with large-scale maintenance tasks, where the limitations of traditional tools become even more apparent.

[0004] Therefore, this application proposes a cotter pin bending fixture to solve the above-mentioned technical problems. Utility Model Content

[0005] The main purpose of this invention is to address the aforementioned shortcomings by providing a cotter pin bending fixture that can quickly and accurately assist operators in completing bending work, thereby improving work efficiency while reducing the risk of operator injury.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A cotter pin bending fixture includes: a bending tube, one end of which is half-sectioned along the axis to form an arc-shaped groove plate, with lugs symmetrically fixed on both sides of the arc-shaped groove plate, and an insert rod fixedly inserted between two lugs, the insert rod being perpendicular to the axis of the bending tube; and a handle, which is cylindrical in shape, with the other end of the bending tube detachably inserted into the handle along the axis of the handle.

[0008] Furthermore, the end of the bent tube with the arc-shaped groove plate is bent, and the bent part covers the entire arc-shaped groove plate.

[0009] Furthermore, the end of the arc-shaped groove plate is provided with a slot for engaging the pin leg of the cotter pin.

[0010] Furthermore, the outer convex corners of the arc-shaped groove plate and the ear block are chamfered.

[0011] Furthermore, the end of the handle is provided with a insertion hole for inserting the bent tube. The outer wall of the handle is provided with a plurality of countersunk threaded holes communicating with the insertion hole along the radial direction of the handle. The bent tube is provided with positioning holes corresponding to the countersunk threaded holes. The screw is screwed into the countersunk threaded hole and passes through the positioning hole to fix the bent tube in the insertion hole.

[0012] Furthermore, an insert is fixedly provided on the outer wall of the bent tube inserted into the handle portion. The insert is parallel to the axis of the bent tube. A slot is provided on the inner wall of the insertion hole to engage with the insert. When the insert is engaged with the slot and the bent tube is fully inserted into the insertion hole, the countersunk threaded hole and the positioning hole are aligned one by one.

[0013] Furthermore, anti-slip rubber dots are evenly arranged around the outer wall of the handle.

[0014] Furthermore, the handle is provided with a pressing groove for placing the thumb.

[0015] The beneficial effects of this utility model are reflected in:

[0016] This invention utilizes the end of an arc-shaped groove plate to abut against the root of the cotter pin leg, and inserts a rod between the two legs to achieve locking of one leg. By bending the handle, the bending tube rotates as a whole, using the lever principle to bend the cotter pin leg from the root, saving time and effort. Furthermore, the leg is unlikely to slip during bending, ensuring user safety. By making the handle and bending tube detachable, different sizes of bending tubes can be replaced when bending cotter pins of different positions and types, thus expanding its application range. Attached Figure Description

[0017] The accompanying drawings, which form part of this application, are used to provide a further understanding 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 undue limitation of the present invention. In the drawings:

[0018] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0019] Figure 2 This is an embodiment of the present utility model. Figure 1 Enlarged view of the structure at point A;

[0020] Figure 3 This is a schematic diagram of the internal structure of the handle according to an embodiment of the present invention;

[0021] Figure 4 This is a schematic diagram of the internal structure of the handle according to an embodiment of the present invention;

[0022] Figure 5 This is a schematic diagram of the insertion of the insert and slot according to an embodiment of the present invention;

[0023] Figure 6 This is a schematic diagram of the usage state of an embodiment of the present utility model;

[0024] Figure 7 This is an embodiment of the present utility model. Figure 6 Enlarged view of the structure at point B.

[0025] In the diagram: 1. Bending tube; 2. Arc-shaped groove plate; 3. Ear block; 4. Insert rod; 5. Handle; 6. Slot; 7. Cotter pin; 8. Insertion hole; 9. Countersunk threaded hole; 10. Positioning hole; 11. Screw; 12. Insert strip; 13. Slot; 14. Anti-slip rubber dot; 15. Pressing groove. Detailed Implementation

[0026] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] like Figure 1-7 As shown, this utility model provides a cotter pin bending fixture, comprising:

[0028] The bent tube 1 has an arc-shaped groove 2 formed by half-sectioning one end along the axis. The two sides of the arc-shaped groove 2 are symmetrically fixed with ear blocks 3. An insert rod 4 is fixedly inserted between the two ear blocks 3. The insert rod 4 is perpendicular to the axis of the bent tube 1. The handle 5 is cylindrical in shape. The other end of the bent tube 1 is detachably inserted into the handle 5 along the axis of the handle 5.

[0029] like Figure 6 and Figure 7As shown, in use, the user holds the handle 5, places the arc-shaped groove plate 2 outside the cotter pin 7 legs, and inserts the rod 4 between the two legs. The end of the arc-shaped groove plate 2 abuts against the root of one of the legs. By bending the handle 5 outwards, the leg that is engaged between the rod 4 and the end of the arc-shaped groove plate 2 can be bent from its root. The other leg can be bent in the same way, or directly by manually pressing it down, thus completing the bending of both legs of the cotter pin 7. During the bending process, the legs are unlikely to slip out between the arc-shaped groove plate 2 and the rod 4, saving time and effort and reducing the risk of injury to the operator.

[0030] In one embodiment, the end of the bent pipe 1 with the arc-shaped groove plate 2 is bent, and the bent part covers the entire arc-shaped groove plate 2.

[0031] like Figure 6 and Figure 7 As shown, in actual operation, there are often other structures and components around the cotter pin 7. If the bending tube 1 is straight, when the handle 5 is bent, the bending tube 1 is very likely to interfere with the structures or components around the cotter pin 7, making it impossible to bend the pin leg of the cotter pin 7 to the required angle, which will have an adverse effect on the installation of the cotter pin 7. When the end of the bending tube 1 is set to be curved, under the same external conditions, it can have more swing space than the straight bending tube 1, ensuring the effective bending of the pin leg of the cotter pin 7.

[0032] It is worth explaining that the length of the bent portion of the bent tube 1 and the curvature of the bend need to be determined according to the actual application scenario, such as the length of the cotter pin 7 leg, the positional relationship between the interference structure around the cotter pin 7 and the cotter pin 7, etc.

[0033] In one embodiment, the end of the arc-shaped groove plate 2 is provided with a slot 6 for engaging the pin leg of the cotter pin 7.

[0034] With this design, when the end of the arc-shaped groove plate 2 abuts against the root of the cotter pin 7, the cotter pin is engaged in the slot 6. During the process of turning the handle 5, the cotter pin is difficult to slide up and down at the end of the arc-shaped groove plate 2 under the limiting effect of the slot 6, thus ensuring the stability of operation.

[0035] In one embodiment, the outer convex corners of the arc-shaped groove plate 2 and the ear block 3 are chamfered.

[0036] This design prevents sharp, protruding edges from scratching users.

[0037] In one embodiment, the end of the handle 5 is provided with a insertion hole 8 for inserting the bent tube 1. The outer wall of the handle 5 is provided with a plurality of countersunk threaded holes 9 communicating with the insertion hole 8 along the radial direction of the handle 5. The bent tube 1 is provided with a positioning hole 10 corresponding to the countersunk threaded hole 9. The screw 11 is screwed into the countersunk threaded hole 9 and passes through the positioning hole 10 to fix the bent tube 1 in the insertion hole 8.

[0038] With this design, by inserting the straight end of the bent tube 1 into the insertion hole 8, aligning the positioning hole 10 and the countersunk threaded hole 9, and then using the screw 11 to pass through the positioning hole 10 and the countersunk threaded hole 9, the connection and fixation between the bent tube 1 and the handle 5 can be completed. It is easy to assemble and disassemble. When bending cotter pins 7 in different positions and of different types, bent tubes 1 of different sizes can be replaced.

[0039] In one embodiment, an insert 12 is fixedly provided on the outer wall of the part of the bent tube 1 inserted into the handle 5. The insert 12 is parallel to the axis of the bent tube 1. A slot 13 is provided on the inner wall of the insertion hole 8 to engage with the insert 12. When the insert 12 is engaged with the slot 13 and the bent tube 1 is fully inserted into the insertion hole 8, the countersunk threaded hole 9 is aligned with the positioning hole 10.

[0040] With this design, the countersunk threaded hole 9 and the positioning hole 10 can be automatically aligned under the limiting effect of the insertion of the insert 12 and the slot 13, which improves the convenience of installing the bent tube 1. In addition, it further avoids relative rotation between the bent tube 1 and the handle 5, ensuring the stability of the bent tube 1 during use.

[0041] In one embodiment, anti-slip rubber dots 14 are evenly arranged around the outer wall of the handle 5.

[0042] This design increases the coefficient of friction between the user's hand and the handle 5, reducing the possibility of the handle 5 slipping out of the hand during use.

[0043] In one embodiment, the handle 5 has a pressing groove 15 for placing the thumb.

[0044] With this design, when the user holds the handle 5, the thumb can be placed in the pressing groove 15, making it easier for the user to exert force when bending the handle 5 and improving the ease of use.

[0045] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention.

[0046] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0047] Furthermore, "multiple" refers to two or more. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

Claims

1. A cotter pin bending fixture, characterized in that, include: A bent tube (1) has an arc-shaped groove plate (2) formed by half-sectioning one end along the axis. Ear blocks (3) are symmetrically fixed on both sides of the arc-shaped groove plate (2). A plug rod (4) is fixedly inserted between the two ear blocks (3). The plug rod (4) is perpendicular to the axis of the bent tube (1). The handle (5) is cylindrical in shape, and the other end of the bent tube (1) is detachably inserted into the handle (5) along the axis of the handle (5).

2. The cotter pin bending fixture as described in claim 1, characterized in that, The bent tube (1) has an arc-shaped groove plate (2) at one end that is bent, and the bent part covers the entire arc-shaped groove plate (2).

3. The cotter pin bending fixture as described in claim 2, characterized in that, The end of the arc-shaped groove plate (2) is provided with a slot (6) for engaging the pin leg of the cotter pin (7).

4. The cotter pin bending fixture as described in claim 3, characterized in that, The outer corners of the arc-shaped groove plate (2) and the ear block (3) are chamfered.

5. The cotter pin bending fixture as described in claim 4, characterized in that, The end of the handle (5) is provided with a insertion hole (8) for inserting the bent tube (1). The outer wall of the handle (5) is provided with a plurality of countersunk threaded holes (9) that communicate with the insertion hole (8) along the radial direction of the handle (5). The bent tube (1) is provided with a positioning hole (10) that corresponds one-to-one with the countersunk threaded hole (9). The screw (11) is screwed into the countersunk threaded hole (9) and passes through the positioning hole (10) to fix the bent tube (1) in the insertion hole (8).

6. The cotter pin bending fixture as described in claim 5, characterized in that, A strip (12) is fixedly installed on the outer wall of the part of the bent tube (1) inserted into the handle (5). The strip (12) is parallel to the axis of the bent tube (1). A slot (13) is provided on the inner wall of the insertion hole (8) to engage with the strip (12). When the strip (12) is engaged with the slot (13) and the bent tube (1) is fully inserted into the insertion hole (8), the countersunk threaded hole (9) is aligned with the positioning hole (10).

7. A cotter pin bending fixture as described in claim 6, characterized in that, Anti-slip rubber dots (14) are evenly arranged around the outer wall of the handle (5).

8. The cotter pin bending fixture as described in claim 7, characterized in that, The handle (5) has a pressing groove (15) for placing the thumb.

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