A clamping pliers with a multi-functional quick-change head

Abstract

This utility model relates to the field of manual hardware tools, and in particular to a clamping pliers with a multi-functional quick-change head. It includes left and right jaws and left and right quick-change heads. A semi-circular jaw positioning groove is provided near the upper end of the left jaw, and a spring hole is provided on one side of the jaw positioning groove. The left and right jaws are mirror images of each other. The left quick-change head has a fixing recess and a U-shaped groove. The left and right quick-change heads have identical structures. A fixing pin passes through the spring hole and U-shaped groove. The fixing recess, spring, washer, and retaining ring connect to fix the jaws. Pressing the bottom of the fixing pin compresses the spring, causing the head of the fixing pin to disengage from the fixing recess. At this point, the old quick-change head can be removed, and the required quick-change head can be replaced. Loosening the fixing pin causes it to return to the fixing recess under the action of the spring, achieving rapid replacement of the clamping pliers' quick-change heads. This utility model has multiple functions and is suitable for pressing workpieces such as wire terminals and aluminum sleeves in various working environments. Through innovative structural design, it greatly improves work efficiency and user experience.

Description

Technical Field

[0001] This utility model relates to the field of manual hardware tools, and more specifically, to a clamping pliers with a multi-functional quick-change head. Background Technology

[0002] A clamping pliers is a tool used to install workpieces such as aluminum sleeve locking clips and wire terminals. The main principle is to pass the object to be fixed, such as a wire rope, through the hole in the aluminum sleeve locking clip, and then deform the aluminum sleeve by squeezing and pressing, thereby tightly gripping the wire rope and achieving a fastening effect through friction and mechanical interlocking force.

[0003] Currently, commercially available crimping pliers can only crimp one type of wire terminal shape, and the range of specifications is limited. This inability to quickly switch between different shapes and specifications restricts their application. Therefore, developing crimping pliers capable of crimping different shapes and specifications is particularly important. Summary of the Invention

[0004] To address the shortcomings of existing products, this utility model provides a clamping pliers with a multi-functional quick-change head. This clamping pliers is easy to operate, has multiple functions, and is suitable for pressing workpieces such as wire terminals and aluminum sleeves in various working environments. Through innovative structural design, it achieves convenience and multi-functionality in the operation process, greatly improving work efficiency and user experience.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A clamping pliers with a multi-functional quick-change head includes a left jaw, a right jaw, a left quick-change head, a right quick-change head, and a fixing pin. The left jaw has a semi-circular jaw positioning groove near its upper end. A spring hole with a smaller diameter at the top and a larger diameter at the bottom is located at the junction of the two holes. The spring can be placed in the larger hole at the bottom of the spring hole, with its upper end contacting the spring positioning surface. The right jaw is a mirror image of the left jaw. The left quick-change head has a fixing recess on its outer side in the middle. The fixing recess is larger than half a circle, and its lower part is a U-shaped groove. The lower part of the left quick-change head is a semi-circular quick-change head positioning surface. The right quick-change head has the same structure as the left quick-change head. The fixing pin passes through the fixing recess, the U-shaped groove, the spring hole, and connects with the spring, a washer, and a retaining ring to fix the left jaw and left quick-change head, as well as the right jaw and right quick-change head. Push the retaining pin upwards to compress the spring. The head of the retaining pin will disengage from the retaining recess. Push the left quick-change head inwards to remove it. Press the retaining pin down and assemble the desired left quick-change head with the left jaw. The quick-change head positioning surface will mate with the jaw positioning groove. Release the retaining pin. The spring will press down the washer and retaining ring, causing the retaining pin to move downwards. The head of the retaining pin will enter the retaining recess, enabling quick-change of quick-change heads to press workpieces of different specifications and shapes. The replacement of the right quick-change head is the same.

[0006] Furthermore, the working surface of the quick-change head has different specifications of circular, square, and hexagonal shapes.

[0007] Furthermore, the tail of the fixing pin has a retaining ring groove, which cooperates with the retaining ring to limit the position of the spring.

[0008] Furthermore, the left jaw and the right jaw each have a hole at the middle and tail, allowing the bolt to pass through the mating nut for fixing the connecting pressure plate, left handle, and right handle.

[0009] Furthermore, both the lower half of the left and right handles are provided with plastic grip sleeves.

[0010] Compared with the prior art, the present invention has the following beneficial effects: 1. In this utility model, the quick-change head can be quickly changed by adjusting the quick disengagement and engagement of the fixing pin and the quick-change head fixing recess. This solves the drawback of traditional clamping pliers that can only press one type of wire terminal shape and have a small specification range. It allows the same tool to press aluminum sleeves and wire terminals of different specifications and shapes without changing tools, thus improving work efficiency. It is suitable for pressing aluminum sleeves and wire terminals in various working environments.

[0011] 2. This utility model has a simple structure and adopts a quick-change head structure to realize the replacement of different quick-change heads. It is convenient to operate and the operation process is intuitive and easy to understand, which greatly improves work efficiency and user experience. Attached Figure Description

[0012] Figure 1 This is an exploded view of the overall structure of this utility model.

[0013] Figure 2 This is a schematic diagram of the quick-change head in this utility model.

[0014] Figure 3 This is a schematic diagram of the structure of the left and right jaws in this utility model.

[0015] Figure 4 This is a schematic diagram of the structure of the fixing pin in this utility model.

[0016] In the diagram: 1. Left jaw; 2. Right jaw; 3. Left quick-change head; 4. Right quick-change head; 5. Fixing pin; 6. Spring; 7. Washer; 8. Snap ring; 9. Fixing recess; 10. U-shaped groove; 11. Spring hole; 12. Snap ring groove; 13. Quick-change head positioning surface; 14. Jaw positioning groove; 15. Bolt 1; 16. Pressure plate; 17. Nut 1; 18. Bolt 2; 19. Nut 2; 20. Left handle; 21. Right handle; 22. Plastic handle cover. Detailed Implementation

[0017] 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 some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of this utility model. Example

[0018] like Figures 1 to 4 As shown, in this embodiment, a clamping pliers with a multi-functional quick-change head includes a left jaw 1, a right jaw 2, a left quick-change head 3, a right quick-change head 4, and a fixing pin 5. The left jaw 1 has a semi-circular jaw positioning groove 14 near its upper end. A spring hole 11 is provided on one side of the jaw positioning groove 14, with a smaller diameter at the top and a larger diameter at the bottom. A spring positioning surface is located at the junction of the two diameter holes. The spring 6 can be placed in the larger hole at the bottom of the spring hole 11, with its upper end contacting the spring positioning surface. The right jaw 2... The structure is mirrored that of the left jaw 1. The left quick-change head 3 has a fixed recess 9 on its outer side in the middle. The fixed recess 9 is larger than half a circle, and its lower part is a U-shaped groove 10. The lower part of the left quick-change head 3 is a semi-circular quick-change head positioning surface 13. The right quick-change head 4 has the same structure as the left quick-change head 3. The fixing pin 5 passes through the fixed recess 9, the U-shaped groove 10, and the spring hole 11, and connects with the spring 6, the washer 7, and the retaining ring 8 to fix the left jaw 1 and the left quick-change head 3, and the right jaw 2 and the right quick-change head 4. The fixing pin 5 has a retaining ring groove 13 at its tail, which cooperates with the retaining ring 8 to limit the position of the spring 6. Push the fixing pin 5 upward to compress the spring 6. The head of the fixing pin 5 disengages from the fixing recess 9. Push the left quick-change head 3 inward to remove it. Press the fixing pin 5 and assemble the required left quick-change head 3 with the left jaw 1. The quick-change head positioning surface 13 mates with the jaw positioning groove 14. Release the fixing pin 5. The spring 6 presses down the washer 7 and the retaining ring 8, causing the fixing pin 5 to move downward. The head of the fixing pin 5 enters the fixing recess 9, realizing the quick change of the quick-change head for pressing workpieces of different specifications and shapes. The replacement of the right quick-change head 4 is the same.

[0019] In this embodiment, the working surfaces of the left quick-change head 3 and the right quick-change head 4 have different specifications of circular, square and hexagonal shapes, so that the clamping clamp can press workpieces of different shapes and specifications.

[0020] In this embodiment, the tail of the fixing pin 5 has a retaining ring groove 13, which cooperates with the retaining ring 8 to limit the position of the spring 6.

[0021] In this embodiment, the left jaw 1 and the right jaw 2 are provided with a hole in the middle and at the tail, so that the bolt 1 (15) and bolt 2 (18) can be inserted into the mating nut 1 (17) and nut 2 (19) to fix and connect the pressure plate 16, the left handle 20 and the right handle 21.

[0022] In this embodiment, both the lower half of the left handle 20 and the right handle 21 are provided with plastic grip sleeves 22. The plastic grip sleeves 22 are soft and non-slip, providing a more comfortable grip for the user. During prolonged use of the snap ring pliers, the plastic grip sleeves can effectively reduce hand fatigue and discomfort. Simultaneously, the plastic grip sleeves increase the friction between the handle and the hand, preventing slippage during use.

[0023] The working principle of this type of clamping pliers with a multi-functional quick-change head: During use, the user pushes the fixing pin 5 upwards to compress the spring 6. The head of the fixing pin 5 disengages from the fixing recess 9. The left quick-change head 3 can then be removed by pushing it inwards. Holding the fixing pin 5, the user assembles the desired left quick-change head 3 with the left jaw 1. The quick-change head positioning surface 13 mates with the jaw positioning groove 14. Releasing the fixing pin 5 causes the spring 6 to press down the washer 7 and retaining ring 8, moving the fixing pin 5 downwards. The head of the fixing pin 5 enters the fixing recess 9, allowing for quick head replacement to press workpieces of different specifications and shapes. The replacement of the right quick-change head 4 follows the same principle. By adjusting the quick disengagement and engagement of the fixing pin 5 with the fixing recess 9 on the quick-change head, the user achieves quick head replacement, overcoming the limitations of traditional clamping pliers that can only press one type of wire terminal shape and have a limited size range. This allows the same tool to press aluminum sleeves and wire terminals of different specifications and shapes without the need to change tools, improving work efficiency. It is suitable for pressing aluminum sleeves and wire terminals in various working environments.

[0024] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. Any obvious variations or modifications derived from the technical solutions of this utility model are still within the protection scope of this utility model.

Claims

1. A compression forceps with multifunctional quick-change head, comprising a left jaw (1), a right jaw (2), a left quick-change head (3), a right quick-change head (4), a fixing pin (5), characterized in that: The left jaw (1) has a jaw positioning groove (14) near the upper end. A spring hole (11) is provided on one side of the jaw positioning groove (14). The right jaw (2) is a mirror image of the left jaw (1). The left quick-change head (3) has a fixed recess (9) and a U-shaped groove (10) on the outer side of the middle. The right quick-change head (4) has the same structure as the left quick-change head (3). The fixing pin (5) passes through the fixed recess (9), U-shaped groove (10), spring hole (11) and connects with the spring (6), washer (7), and retaining ring (8) to fix the left jaw (1) and the left quick-change head (3), the right jaw (2) and the right quick-change head (4).

2. The compression forceps with multifunctional quick-change head according to claim 1, characterized in that: The jaw positioning groove (14) on the left jaw (1) is semi-circular. A spring (6) is placed in the lower part of the spring hole (11) on one side of the jaw positioning groove (14). The diameter of the spring hole (11) is smaller at the top and larger at the bottom. There is a spring positioning surface at the junction of the two diameters, which is in contact with the spring (6). The right jaw (2) is a mirror image of the left jaw (1).

3. The clamping pliers with a multi-functional quick-change head according to claim 1, characterized in that: The fixed recess (9) on the left quick-change head (3) is more than half a circle, and its lower part is a U-shaped groove (10). The working surface of the left quick-change head (3) has different specifications of circular, square and hexagonal shapes. The lower part of the left quick-change head (3) is the quick-change head positioning surface (13), which is semi-circular in shape and cooperates with the jaw positioning groove (14). The fixed pin (5) has a retaining ring groove (12) at its tail, which cooperates with the retaining ring (8).

4. The clamping pliers with a multi-functional quick-change head according to claim 1, characterized in that: The left jaw (1) and the right jaw (2) each have a hole in the middle and at the tail, so that bolt 1 (15) and bolt 2 (18) can be inserted into the mating nut 1 (17). Nut 2 (19) is used to fix the connecting pressure plate (16), left handle (20) and right handle (21).

5. The clamping pliers with a multi-functional quick-change head according to claim 4, characterized in that: The lower half of both the left handle (20) and the right handle (21) is provided with plastic grip sleeves (22).

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