A special-purpose pliers for assembling a terminal

Abstract

This utility model provides a special pliers for assembling terminal blocks, including a first pliers handle, a second pliers handle, a pivot, a thin pliers head, a thick pliers head, and an anti-pinch limiting component. The first pliers handle and the second pliers handle are hinged together by the pivot. The thin pliers head is detachably mounted on the front end of the first pliers handle, and the thick pliers head is detachably mounted on the front end of the second pliers handle. The clamping ends of the thin pliers head and the thick pliers head are respectively provided with a first clamping block and a second clamping block extending in the same direction. The opposing end faces of the first clamping block and the second clamping block are provided with a wavy toothed surface. The inner side of the thick pliers head adjacent to the second clamping block is provided with an outwardly curved avoidance arc surface, which creates a clamping gap between the first clamping block and the second clamping block. The front end of the first pliers handle is provided with an anti-pinch groove, and the front end of the second pliers handle is provided with an anti-pinch post. The anti-pinch limiting component detachably connects the anti-pinch post and the anti-pinch groove. This utility model relates to the field of assembly tooling technology.

Description

Technical Field

[0001] This utility model relates to the field of assembly tooling technology, and in particular to a special pliers for assembling terminal blocks. Background Technology

[0002] Terminal block assembly is a critical operation in electrical connections, requiring reliable fixing of wires and terminals to ensure conductivity. Traditional terminal block assembly fixtures are mostly fixed designs. While they can install multiple wires simultaneously, they have significant drawbacks: these fixtures require the wires to be in a ribbon configuration, meaning they must be pre-stripped and neatly arranged before installation. However, in practical applications, ordinary cables often cannot maintain consistent spacing and arrangement. Irregular spacing between wires prevents simultaneous insertion into the terminal blocks, increasing operational difficulty and reducing assembly efficiency. This fixed design is poorly suited for non-ideal cable conditions and cannot adapt to flexible working scenarios.

[0003] To address the shortcomings of fixed tooling, the industry has developed portable terminal block assembly pliers. These pliers simplify the structure, for example by adding positioning and clamping claws to the head of ordinary pliers, enabling convenient operation in confined spaces or when short-circuiting cables. Their advantages include stable structure, compact size for easy portability, and compatibility with rapid assembly scenarios involving different numbers of terminal blocks. However, existing portable assembly pliers still have several drawbacks: First, the clamping ends lack an effective engagement mechanism, resulting in unstable clamping force and a tendency to loosen or damage wires during operation; second, the plier head design does not consider anti-pinch features, potentially causing accidental injury to wires or the operator during clamping; furthermore, the pliers lack a safety locking device, allowing the handles to accidentally open and close repeatedly when not in use, increasing storage and carrying risks; finally, the plier head is usually fixed, making it difficult to disassemble and replace, limiting its flexibility to adapt to different assembly needs. These shortcomings restrict the practicality and safety of portable assembly pliers and urgently require improvement.

[0004] Therefore, it is particularly important to develop a new type of special clamp for assembling terminal blocks to address the aforementioned problems in the existing technology, in order to improve clamping reliability, operational safety and ease of maintenance. Utility Model Content

[0005] In view of the above-mentioned defects in the prior art, this utility model provides a special pliers for assembling terminal blocks, which aims to solve the problems of unstable clamping force, easy damage to wires, lack of safety locking function and non-removable and replaceable pliers head in the prior art.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a special pliers for assembling terminal blocks, comprising a first pliers handle, a second pliers handle, a pivot, a thin pliers head, a thick pliers head, and an anti-pinch limiting component. The first pliers handle and the second pliers handle are hinged together by the pivot. The thin pliers head is detachably mounted on the front end of the first pliers handle, and the thick pliers head is detachably mounted on the front end of the second pliers handle. The clamping ends of the thin pliers head and the thick pliers head are respectively provided with a first clamping block and a second clamping block extending in the same direction. The opposite end faces of the first clamping block and the second clamping block are provided with wavy toothed surfaces. The inner side of the thick pliers head adjacent to the second clamping block is provided with an outwardly curved avoidance arc surface. The avoidance arc surface creates a clamping gap between the first clamping block and the second clamping block. The front end of the first pliers handle is provided with an anti-pinch groove, and the front end of the second pliers handle is provided with an anti-pinch post. The anti-pinch limiting component is detachably connected to the anti-pinch post and the anti-pinch groove for locking the pliers handle in the closed state.

[0007] Based on the above, the beneficial effects of a special pliers for assembling terminal blocks are that it solves the problems of unstable clamping force, easy damage to wires, lack of safety locking function, and non-removable and replaceable pliers heads in the existing terminal block assembly pliers; mainly reflected in:

[0008] 1. This utility model enhances the friction and engagement of the clamping end faces by setting the wavy tooth surface on the opposite end faces of the first clamping block and the second clamping block, thereby achieving the stability and reliability of the clamping force and solving the problem of wire loosening caused by unstable clamping force in the prior art.

[0009] 2. This utility model avoids the arc surface set on the inner side of the thick clamp head adjacent to the second clamping block and bends outward to form a clamping gap, which reduces the contact pressure and stress concentration during the clamping process, realizes the protection of the wire, and solves the problem of easy damage to the wire in the prior art.

[0010] 3. This utility model uses an anti-pinch limiting component to detachably connect the anti-pinch post at the front end of the second clamp handle to the anti-pinch groove at the front end of the first clamp handle. When not in use, the clamp handle is locked in a closed state, which prevents the risk of pinching injury or tool damage caused by accidental opening or closing of the clamp handle, thereby improving operational safety and storage convenience.

[0011] 4. This utility model allows for the detachable installation of a thin plier head on the front end of the first plier handle and a thick plier head on the front end of the second plier handle. This detachable installation method allows users to quickly replace the plier heads according to assembly requirements, realizing modular maintenance and adaptive adjustment of the plier heads, and solving the problem of insufficient flexibility caused by the non-removable replacement of plier heads in the prior art.

[0012] Furthermore, the anti-pinch limiting component includes an anti-pinch limiting member and a limiting post. The anti-pinch limiting member has a post hole and a slot hole at both ends. The post hole is fixedly sleeved on the anti-pinch post, and the slot hole is located directly above the anti-pinch slot. The limiting post can be detachably passed through the slot hole and inserted into the anti-pinch slot in sequence.

[0013] Based on the above, the beneficial effects of the anti-pinch limiting component are that, through the cooperative design of the anti-pinch limiting component and the limiting post, the pliers handle can be detachably locked in the closed state, preventing the pliers from being accidentally opened or closed when not in use, thus improving safety and portability.

[0014] Furthermore, the first pliers handle has a first trapezoidal mounting boss at its front end, the second pliers handle has a second trapezoidal mounting boss at its front end, the thin pliers head has a first mounting groove that matches the first trapezoidal mounting boss, and the thick pliers head has a second mounting groove that matches the second trapezoidal mounting boss. The thin pliers head is fixed by a first pin passing through the first mounting groove and the first trapezoidal mounting boss, and the thick pliers head is fixed by a second pin passing through the second mounting groove and the second trapezoidal mounting boss.

[0015] Based on the above, the beneficial effects of the first trapezoidal mounting boss are: it forms a stable mounting reference surface at the front end of the first pliers handle, forming a trapezoidal fit with the first mounting groove of the thin pliers head, thus achieving precise positioning of the pliers head; the beneficial effects of the second trapezoidal mounting boss are: it forms a stable mounting reference surface at the front end of the second pliers handle, forming a trapezoidal fit with the second mounting groove of the thick pliers head, thus achieving precise positioning of the pliers head; the beneficial effects of the first mounting groove are: it forms a trapezoidal fit structure with the first trapezoidal mounting boss, thus achieving rapid positioning and reliable fixing of the thin pliers head; the beneficial effects of the second mounting groove are: it forms a trapezoidal fit structure with the second trapezoidal mounting boss, thus achieving rapid positioning and reliable fixing of the thick pliers head; the beneficial effects of the first pin are: it penetrates the first mounting groove and the first trapezoidal mounting boss, thus achieving a detachable fixed connection of the thin pliers head; the beneficial effects of the second pin are: it penetrates the second mounting groove and the second trapezoidal mounting boss, thus achieving a detachable fixed connection of the thick pliers head.

[0016] Furthermore, the opening direction of the first mounting groove faces the thick pliers head, and the opening direction of the second mounting groove faces the thin pliers head.

[0017] Furthermore, the thickness of the first trapezoidal mounting boss and the second trapezoidal mounting boss is less than the thickness of the front end of the clamp handle.

[0018] Furthermore, the limiting post is made of rubber.

[0019] Based on the above, the beneficial effects of using rubber material for the limit post are that it realizes the elastic buffer function of the anti-pinch limit component, effectively absorbs the impact force when the locking handle is closed, prevents rigid collision between metal parts, and the rubber material has anti-slip properties, which enhances the fixing effect of the limit post in the anti-pinch groove and improves the safety of use.

[0020] To more clearly illustrate the above-mentioned features of this utility model and the objectives it aims to achieve, the present utility model will be further described below in conjunction with the accompanying drawings and specific embodiments. Attached Figure Description

[0021] Figure 1 : This is a perspective view of the present invention.

[0022] Figure 2 : This is an exploded view of the present invention.

[0023] Explanation of reference numerals: 1-First clamp handle, 11-Anti-pinch groove, 12-First trapezoidal mounting boss, 2-Second clamp handle, 21-Anti-pinch post, 22-Second trapezoidal mounting boss, 3-Spindle, 4-Thin clamp head, 41-First clamping block, 42-First mounting groove, 43-First pin, 5-Thick clamp head, 51-Second clamping block, 52-Avoidance arc surface, 53-Second mounting groove, 54-Second pin, 6-Wave toothed surface, 7-Clamping gap, 8-Anti-pinch limiting component, 81-Anti-pinch limiting component, 811-Post hole, 812-Slot hole, 82-Limiting post. Detailed Implementation

[0024] like Figures 1-2 As shown, a special clamp for assembling terminal blocks includes a first clamp handle 1, a second clamp handle 2, a pivot 3, a thin clamp head 4, a thick clamp head 5, and an anti-pinch limiting assembly 8. The first clamp handle 1 and the second clamp handle 2 are hinged together by the pivot 3. The thin clamp head 4 is detachably mounted on the front end of the first clamp handle 1, and the thick clamp head 5 is detachably mounted on the front end of the second clamp handle 2. The clamping ends of the thin clamp head 4 and the thick clamp head 5 are respectively provided with a first clamping block 41 and a second clamping block 51 extending in the same direction. Both the first clamping block 41 and the second clamping block 51 have wavy toothed surfaces 6 on their opposite end faces. The thick clamping head 5 has an outwardly curved avoidance arc surface 52 on its inner side adjacent to the second clamping block 51. The avoidance arc surface 52 creates a clamping gap 7 between the first clamping block 41 and the second clamping block 51. The front end of the first clamping handle 1 has an anti-pinch groove 11, and the front end of the second clamping handle 2 has an anti-pinch post 21. The anti-pinch limiting component 8 is detachably connected to the anti-pinch post 21 and the anti-pinch groove 11 to lock the clamping handle in the closed state.

[0025] The anti-pinch limiting component 8 includes an anti-pinch limiting member 81 and a limiting post 82. The anti-pinch limiting member 81 has a post hole 811 and a slot hole 812 at both ends. The post hole 811 is fixedly sleeved on the anti-pinch post 21. The slot hole 812 is located directly above the anti-pinch groove 11. The limiting post 82 can be detachably passed through the slot hole 812 and inserted into the anti-pinch groove 11.

[0026] The first clamp handle 1 has a first trapezoidal mounting boss 12 at its front end, and the second clamp handle 2 has a second trapezoidal mounting boss 22 at its front end. The thin clamp head 4 has a first mounting groove 42 that matches the first trapezoidal mounting boss 12, and the thick clamp head 5 has a second mounting groove 53 that matches the second trapezoidal mounting boss 22. The thin clamp head 4 is fixed by a first pin 43 passing through the first mounting groove 42 and the first trapezoidal mounting boss 12, and the thick clamp head 5 is fixed by a second pin 54 passing through the second mounting groove 53 and the second trapezoidal mounting boss 22.

[0027] The opening of the first mounting groove 42 faces the thick pliers head 5, and the opening of the second mounting groove 53 faces the thin pliers head 4.

[0028] The thickness of the first trapezoidal mounting boss 12 and the second trapezoidal mounting boss 22 is less than the thickness of the front end of the clamp handle.

[0029] The limiting post 82 is made of rubber.

[0030] In summary, the specific embodiments of this utility model are as follows:

[0031] First, the user prepares special pliers and installs the pliers heads according to the type of terminal block to be assembled. The thin pliers head 4 is aligned with the first trapezoidal mounting boss 12 at the front end of the first pliers handle 1 through its first mounting groove 42, ensuring the opening faces the thick pliers head 5. Then, the first pin 43 is inserted for fixation. Simultaneously, the second mounting groove 53 of the thick pliers head 5 is aligned with the second trapezoidal mounting boss 22 at the front end of the second pliers handle 2, ensuring the opening faces the thin pliers head 4, and the second pin 54 is inserted for fixation. After completing the pliers head installation, the user holds the first pliers handle 1 and the second pliers handle 2, and opens and closes the pliers body through the hinge operation of the pivot 3 to assemble the terminal block. During clamping, the first clamping block 41 of the thin pliers head 4 and the second clamping block 51 of the thick pliers head 5 move relative to each other, and their wavy tooth surface 6 engages with the wire surface, enhancing the clamping effect. The thick pliers head 5 maintains stability; at the same time, the avoidance arc surface 52 of the thick pliers head 5 forms a clamping gap 7, reducing the stress concentration of the wire and preventing damage. After operation, in the non-use state, the user uses the anti-pinch limit component 8 to lock the pliers handle in the closed state: first, the post hole 811 of the anti-pinch limit component 81 is sleeved on the anti-pinch post 21 of the second pliers handle 2, so that the slot hole 812 is aligned with the anti-pinch groove 11 of the first pliers handle 1, and then the rubber limit post 82 is inserted into the slot hole 812 and embedded in the anti-pinch groove 11 to achieve elastic locking and prevent accidental opening and closing. When unlocking, the pliers body can be restored by pulling out the limit post 82. During maintenance, the thin pliers head 4 or the thick pliers head 5 can be quickly replaced by removing the first pin 43 or the second pin 54 to adapt to different assembly requirements. The whole process ensures reliable clamping, safe operation and convenient maintenance.

[0032] The above description is only the optimal solution embodiment of this utility model and is not intended to limit this utility model. Various modifications or substitutions made by those skilled in the art to this utility model without departing from the essence and protection scope of this utility model should also be within the protection scope of this utility model.

Claims

1. A special pliers for assembling terminal blocks, characterized in that: The device includes a first clamp handle (1), a second clamp handle (2), a pivot (3), a thin clamp head (4), a thick clamp head (5), and an anti-pinch limiting assembly (8). The first clamp handle (1) and the second clamp handle (2) are hinged together by the pivot (3). The thin clamp head (4) is detachably mounted on the front end of the first clamp handle (1), and the thick clamp head (5) is detachably mounted on the front end of the second clamp handle (2). The clamping ends of the thin clamp head (4) and the thick clamp head (5) are respectively provided with a first clamping block (41) and a second clamping block (51) extending in the same direction. The end faces of the holding blocks (51) are provided with wavy toothed surfaces (6). The thick pliers head (5) has an outwardly curved avoidance arc surface (52) on the inner side of the second clamping block (51). The avoidance arc surface (52) forms a clamping gap (7) between the first clamping block (41) and the second clamping block (51). The front end of the first pliers handle (1) is provided with an anti-pinch groove (11). The front end of the second pliers handle (2) is provided with an anti-pinch post (21). The anti-pinch limiting component (8) is detachably connected to the anti-pinch post (21) and the anti-pinch groove (11) to lock the pliers handle in the closed state.

2. The terminal assembly pliers according to claim 1, characterized in that: The anti-pinch limiting component (8) includes an anti-pinch limiting member (81) and a limiting post (82). The anti-pinch limiting member (81) has a post hole (811) and a slot hole (812) at both ends. The post hole (811) is fixedly sleeved on the anti-pinch post (21). The slot hole (812) is located directly above the anti-pinch groove (11). The limiting post (82) can be detachably passed through the slot hole (812) and inserted into the anti-pinch groove (11).

3. The special pliers for assembling terminal blocks according to claim 1, characterized in that: The first clamp handle (1) has a first trapezoidal mounting boss (12) at its front end, and the second clamp handle (2) has a second trapezoidal mounting boss (22) at its front end. The thin clamp head (4) has a first mounting groove (42) that matches the first trapezoidal mounting boss (12), and the thick clamp head (5) has a second mounting groove (53) that matches the second trapezoidal mounting boss (22). The thin clamp head (4) is fixed by a first pin (43) passing through the first mounting groove (42) and the first trapezoidal mounting boss (12), and the thick clamp head (5) is fixed by a second pin (54) passing through the second mounting groove (53) and the second trapezoidal mounting boss (22).

4. The special pliers for assembling terminal blocks according to claim 3, characterized in that: The opening direction of the first mounting groove (42) faces the thick pliers head (5), and the opening direction of the second mounting groove (53) faces the thin pliers head (4).

5. A special pliers for assembling terminal blocks according to claim 3, characterized in that: The thickness of the first trapezoidal mounting boss (12) and the second trapezoidal mounting boss (22) is less than the thickness of the front end of the clamp handle.

6. The special pliers for assembling terminal blocks according to claim 2, characterized in that: The limiting post (82) is made of rubber.

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