A kind of pliers with multiple specifications and easy-to-change heads

Abstract

The present invention proposes a multi-specification, easily replaceable-head pliers, comprising a handle and a pliers head detachably connected to the handle; the handle comprises a handle insert arranged at the front end; a limiting countersunk hole is provided in the handle insert; a first inclined surface is provided on one side of the limiting countersunk hole, and a second inclined surface is provided on the other side; the pliers head comprises a third inclined surface arranged at the tail; a limiting boss is provided on the side of the pliers head; the first inclined surface matches the third inclined surface; and the limiting countersunk hole matches the limiting boss. The multi-specification, easily replaceable-head pliers of the present invention have a simple structure, strong rigidity, high torque, and are easy to use. The pliers head can be quickly inserted into the handle, and a double limiting method is used to achieve a quick and stable connection between the pliers head and the handle, thereby achieving multiple uses with one handle, saving materials and costs, and solving the problems of the existing interchangeable-head circlip pliers, such as complicated head replacement steps, poor structural rigidity, low torque, and a small scope of application, which cannot be applied to high-torque pliers structures.

Description

Technical Field

[0001] The present invention relates to the technical field of hand tools, in particular to a pair of pliers with multiple specifications and easily replaceable heads. Background Art

[0002] Currently, most of the multifunctional interchangeable head circlip pliers sold on the market have an external torsion spring, a double coaxial and four fasteners superimposed limit structure. A variety of pliers heads can be detachably connected to the handle through this structure, thus achieving the purpose of one pliers for multiple uses. However, this type of multifunctional interchangeable head circlip pliers still has the following shortcomings in actual use:

[0003] (1) When replacing pliers with different specifications, it is necessary to first remove the fasteners with a tool or press hard on both sides of the center of the pliers shaft, turn the locking plate 90° to the vertical direction, take out the pliers for replacement, and then lock the fasteners or turn the locking plate 90° to lock the pliers to complete the replacement. The operation steps are complicated and inconvenient to replace, especially when working under special working conditions (for example, when working at height, one hand sometimes needs to maintain body balance, and when working in a dark environment, one hand needs to hold lighting equipment). It is particularly inconvenient to replace the pliers.

[0004] (2) If the replaced pliers head is accidentally touched at the tail end during operation, it is easy to cause the pliers head to flip over and detach from the handle positioning guide post, causing its function to fail. The operator needs to manually re-install it into the handle positioning guide post before it can continue to be used.

[0005] (3) This form is limited to the structure of circlip pliers and cannot be used for pliers with other functions.

[0006] (4) This structure has poor rigidity and small torque.

[0007] Therefore, it is necessary to invent a multifunctional replaceable head pliers that is easy to replace multiple pliers heads and is not prone to functional failure. Summary of the Invention

[0008] In order to solve the above problems, the present invention provides a pair of pliers with multiple specifications and easily replaceable heads.

[0009] The technical solution of the present invention is: a pair of pliers with multiple specifications and easily replaceable heads, comprising a handle and a pliers head detachably connected to the handle; the handle comprises a handle insert arranged at the front end; a limiting countersunk hole is provided in the handle insert; a first inclined surface is provided on one side of the limiting countersunk hole, and a second inclined surface is provided on the other side; the pliers head comprises a third inclined surface arranged at the tail; a limiting boss is provided on the side of the pliers head; the first inclined surface matches the third inclined surface; the limiting countersunk hole matches the limiting boss.

[0010] Furthermore, a positioning hole is provided at the front end of the handle, and the positioning hole matches the limiting countersunk hole; fasteners are provided in the positioning hole and the limiting countersunk hole; and the handle and the handle insert are connected via the fasteners.

[0011] Furthermore, the handle and the handle insert are connected by welding.

[0012] Furthermore, the handle includes an upper handle and a lower handle; the upper handle and the lower handle are movably connected via two handle fixing members.

[0013] Furthermore, the handle insert includes an upper handle insert and a lower handle insert; a circular arc is provided on one side of the upper handle insert, and a semicircular arc is provided on the front end side of the lower handle; the circular arc matches the semicircular arc and is used to limit the starting and ending positions of the opening and closing of the upper handle and the lower handle.

[0014] Furthermore, an independent torsion spring is provided in the pliers head.

[0015] Furthermore, the pliers head includes a scissors assembly, an oblique nozzle assembly, a pointed nozzle assembly, a wire cutter assembly, and a wire stripper assembly.

[0016] The multi-specification easy-to-change head pliers of the present invention have a simple structure, strong rigidity, large torque, and are easy to use. The pliers head can be quickly inserted into the handle and fit together through the first inclined surface and the third inclined surface in the handle insert; the limiting boss is buckled into the limiting countersunk hole in a double limiting manner, which realizes the connection between the pliers head and the handle, thereby realizing multiple uses of one handle, saving materials and costs, and solving the problems of the existing interchangeable head circlip pliers, such as complicated head changing steps, poor structural rigidity, small torque, small scope of application, and inability to be applicable to high-torque pliers structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the present invention;

[0018] Figure 2 It is an exploded view of the structure of the present invention;

[0019] Figure 3 A cross-sectional view of the local structure of the upper handle insert and the lower handle;

[0020] Figure 4 Schematic diagram of the structure of the nozzle assembly;

[0021] Figure 5 Schematic diagram of the structure of the scissors assembly;

[0022] Figure 6 It is a structural diagram of the oblique nozzle assembly;

[0023] Figure 7It is a structural diagram of a wire cutter assembly;

[0024] Figure 8 Schematic diagram of the structure of the wire stripper assembly.

[0025] In the figure, handle-1, pliers head-2; handle insert-1.1, limiting countersunk hole-1.2, first bevel-1.3, second bevel-1.4, positioning hole-1.5, fastener-1.6, upper handle-1.7, lower handle-1.8, handle fixing part-1.9, semicircular arc-1.10; third bevel-2.1, limiting boss-2.2, independent torsion spring-2.3, scissors assembly-2.4, oblique nozzle assembly-2.5, pointed nozzle assembly-2.6, wire cutters assembly-2.7, wire stripper assembly-2.8; upper handle insert-1.1.1, lower handle insert-1.1.2, arc-1.1.3. DETAILED DESCRIPTION

[0026] The following is a detailed description of the multi-specification easy-to-change head pliers of the present invention with reference to the accompanying drawings.

[0027] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 、 Figure 8As shown, a multi-specification easily interchangeable head pliers comprises a handle 1 and a pliers head 2 detachably connected to the handle 1; the handle 1 comprises a handle insert 1.1 arranged at the front end; a limiting countersunk hole 1.2 is provided in the handle insert 1.1; a first inclined surface 1.3 is provided on one side of the limiting countersunk hole 1.2, and a second inclined surface 1.4 is provided on the other side; the pliers head 2 comprises a third inclined surface 2.1 arranged at the rear end; a limiting boss 2.2 is provided on the side of the pliers head 2; the first inclined surface 1.3 matches the third inclined surface 2.1; the limiting countersunk hole 1.2 matches the limiting boss 2.2; a positioning hole 1.5 is provided at the front end of the handle 1, the positioning hole 1.5 matches the limiting countersunk hole 1.2; a fastener 1.6 is provided between the positioning hole 1.5 and the limiting countersunk hole 1.2; the handle 1 and the handle insert 1.1 are connected by the fastener 1.6; The handle 1 is connected to the handle insert 1.1 by welding; the handle 1 includes an upper handle 1.7 and a lower handle 1.8; the upper handle 1.7 and the lower handle 1.8 are movably connected by two handle fixing parts 1.9; the handle insert 1.1 includes an upper handle insert 1.1.1 and a lower handle insert 1.1.2; a circular arc 1.1.3 is provided on one side of the upper handle insert 1.1.1, and a semicircular arc 1.10 is provided on the front side of the lower handle 1.8; the circular arc 1.1.3 matches the semicircular arc 1.10, and is used to limit the starting and ending positions of the opening and closing of the upper handle 1.7 and the lower handle 1.8; an independent torsion spring 2.3 is provided in the pliers head 2; the head of the pliers head 2 includes a scissors assembly 2.4, an oblique nozzle assembly 2.5, a pointed nozzle assembly 2.6, a wire cutter assembly 2.7, and a wire stripper assembly 2.8.

[0028] In actual use, the user only needs to take out the required pliers head 2 and insert it into the front end of the handle 1 to complete the installation of the pliers head; during the insertion process, the second bevel 1.4 plays a guiding role, making the insertion of the pliers head 2 more convenient, and the first bevel 1.3 in the handle insert 1.1 is fitted with the third bevel 2.1, and the limiting boss 2.2 is buckled into the limiting countersunk hole 1.2. The double limiting method realizes a quick and firm connection between the pliers head 2 and the handle 1.

[0029] The above description is merely a preferred embodiment of the present invention and does not constitute any form of limitation to the present invention. Although the present invention has been disclosed as a preferred embodiment, it is not intended to limit the present invention. Any technician familiar with the present profession can make slight changes or modifications to equivalent embodiments using the technical contents disclosed above without departing from the scope of the technical solution of the present invention. However, any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A multi-specification easy-to-change head pliers, characterized in that: it comprises a handle (1) and a pliers head (2) detachably connected to the handle (1); the handle (1) comprises a handle insert (1.1) arranged at the front end; a limiting countersunk hole (1.2) is provided in the handle insert (1.1); a first inclined surface (1.3) is provided on one side of the limiting countersunk hole (1.2), and a second inclined surface (1.4) is provided on the other side; the pliers head (2) comprises a third inclined surface (2.1) arranged at the tail; a limiting boss (2.2) is provided on the side of the pliers head (2); the first inclined surface (1.3) matches the third inclined surface (2.1); the limiting countersunk hole (1.2) matches the limiting boss (2.2); The front end of the handle (1) is provided with a positioning hole (1.5), and the positioning hole (1.5) matches the limiting countersunk hole (1.2); the positioning hole (1.5) and the limiting countersunk hole (1.2) are provided with a fastener (1.6); the handle (1) and the handle insert (1.1) are connected via the fastener (1.6); The handle (1) and the handle insert (1.1) are connected by welding; The handle (1) comprises an upper handle (1.7) and a lower handle (1.8); the upper handle (1.7) and the lower handle (1.8) are movably connected via two handle fixing members (1.9); The handle insert (1.1) comprises an upper handle insert ( 1.1.1) and a lower handle insert (1.1.2); a circular arc (1.1.3) is provided on one side of the upper handle insert (1.1.1), and a semicircular arc (1.10) is provided on one side of the front end of the lower handle (1.8); the circular arc (1.1.3) matches the semicircular arc (1.10) and is used to limit the opening and closing start and end positions of the upper handle (1.7) and the lower handle (1.8).

2. The multi-specification easily replaceable head pliers according to claim 1, characterized in that: An independent torsion spring (2.3) is provided in the pliers head (2).

3. The multi-specification easily replaceable head pliers according to claim 2, characterized in that: The head of the pliers head (2) comprises a scissors assembly (2.4), an oblique mouth assembly (2.5), a pointed mouth assembly (2.6), a wire cutter assembly (2.7), and a wire stripper assembly (2.8).

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