Pliers pivoting structure capable of improving labor-saving effect and diagonal pliers, nipper pliers and cutting pliers based on pliers pivoting structure

Abstract

A plier pivot joint structure capable of improving labor-saving effect and diagonal pliers, nipper pliers and cutting pliers based on the same comprise a first pivot joint portion, a second pivot joint portion and a pivot of the plier, and the pivot is connected to the front portion of the first pivot joint portion and the front portion of the second pivot joint portion. The first pivot joint part and the second pivot joint part are provided with a first arc hole and a second arc hole which take the center of the pivot as the circle center respectively, the first arc hole and the second arc hole are arranged in a staggered mode, and the first pivot joint part is perpendicularly connected with a first reinforcing pin inserted into the second arc hole. A first reinforcing pin inserted into the first arc hole is perpendicularly connected to the first pivot joint part, a second reinforcing pin inserted into the first arc hole is perpendicularly connected to the second pivot joint part, the first reinforcing pin is matched with the second arc hole, the second reinforcing pin is matched with the first arc hole, and when the first pivot joint part and the second pivot joint part rotate relatively, the first reinforcing pin and the second reinforcing pin slide along the long diameter of the second arc hole and the long diameter of the first arc hole respectively. The labor-saving clamp can solve the technical problem that the traditional clamp tool cannot further improve the labor-saving effect.

Description

Technical Field

[0001] The utility model belongs to the technical field of hardware tools, and in particular relates to a pliers pivot structure capable of improving the labor-saving effect, and diagonal pliers, needle-nosed pliers and wire cutters based on the structure. Background Art

[0002] Pliers tools are generally composed of two cross-hinged pliers bodies, with the length of the pliers handle being longer than the length of the pliers head, and the labor-saving effect is achieved through the principle of leverage. In order to improve the labor-saving process, the user can increase the length ratio of the pliers handle to the pliers head as much as possible. However, in actual applications, due to the need to consider the strength of the pivotal part of the pliers body and the shear resistance of the pivot, the pivot is usually set in the middle of the pivot part, and the pivot has a larger diameter. Such a structure makes it impossible to further reduce the distance between the pivot and the clamping point of the pliers head. Due to the limitation of the human hand's grip range and the requirement of the pliers head opening, the length of the pliers handle cannot be increased at will. The final result is that the labor-saving effect cannot be further improved on the current traditional structure of pliers tools. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a pliers pivot structure which can improve the labor-saving effect, thereby solving the technical problem that traditional pliers tools cannot further improve the labor-saving effect.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pliers pivot structure that can improve the labor-saving effect, including a first pivot part, a second pivot part and a pivot of the pliers, the front ends of the first pivot part and the second pivot part are respectively used to connect the corresponding pliers heads, and the rear ends are respectively used to connect the corresponding pliers handles, the first pivot part and the second pivot part are partially overlapped, and it is characterized in that the pivot is connected to the front parts of the first pivot part and the second pivot part, and the first pivot part and the second pivot part are respectively provided with a first arc hole and a second arc hole with the center of the pivot as the center of the circle, the first arc hole and the second arc hole are staggered with each other, a first reinforcing pin inserted into the second arc hole is vertically connected to the first pivot part, and a second reinforcing pin inserted into the first arc hole is vertically connected to the second pivot part, the first reinforcing pin is adapted to the second arc hole, and the second reinforcing pin is adapted to the first arc hole, when the first pivot part and the second pivot part rotate relatively, the first reinforcing pin and the second reinforcing pin slide along the long diameter of the second arc hole and the first arc hole respectively.

[0005] As a preferred solution, the first reinforcement pin and the second reinforcement pin are cylindrical pins or waist-shaped pins with a waist-shaped cross section.

[0006] As a preferred solution, the top ends of the first reinforcement pin and the second reinforcement pin are radially extended to form circular stop caps, and the opposite ends of the first arc hole and the second arc hole are provided with step holes that cooperate with the stop caps, and the stop caps are embedded in the step holes.

[0007] As a preferred solution, the facing surfaces of the first pivot part and the second pivot part are respectively provided with step surfaces protruding towards each other, the two step surfaces abut against each other, and the pivot, the first arc hole and the second arc hole are all provided on the step surfaces.

[0008] The utility model further aims to solve the technical problem of providing a diagonal cutting pliers to solve the technical problem that the current diagonal cutting pliers cannot further improve the labor-saving effect.

[0009] In order to solve the above technical problems, the technical solution adopted by the utility model is: a diagonal pliers, including the above-mentioned pliers pivot structure that can improve the labor-saving effect, the front ends of the first pivot part and the second pivot part are respectively connected with mutually matching pliers heads, the opposite sides of the pliers heads are respectively provided with mutually engaging cutting edges, and the rear ends of the first pivot part and the second pivot part are respectively connected with pliers handles.

[0010] The utility model further aims to solve the technical problem of providing a long-nosed pliers to solve the technical problem that the current long-nosed pliers cannot further improve the labor-saving effect.

[0011] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pair of needle-nose pliers, including the above-mentioned pliers pivot structure that can improve the labor-saving effect, the front ends of the first pivot part and the second pivot part are respectively connected with mutually matching pliers heads, and the rear ends of the first pivot part and the second pivot part are respectively connected with pliers handles.

[0012] The utility model further aims to solve the technical problem of providing a wire cutter to solve the technical problem that the existing wire cutters cannot further improve the labor-saving effect.

[0013] In order to solve the above technical problems, the technical solution adopted by the utility model is: a pair of wire pliers, including the above-mentioned pliers pivot structure that can improve the labor-saving effect, the front ends of the first pivot part and the second pivot part are respectively connected to mutually matching pliers heads, and the rear ends of the first pivot part and the second pivot part are respectively connected to pliers handles.

[0014] The beneficial effect of the utility model is that the utility model utilizes the first reinforcing pin and the second reinforcing pin to share the shear force exerted on the pivot, so that the diameter of the pivot can be further reduced. On the basis of further reducing the diameter of the pivot, the center of the pivot can also be further moved toward the direction of the clamp head, thereby further reducing the distance between the clamp head and the center of the pivot, expanding the ratio of the power arm to the resistance arm, and achieving the technical goal of further improving the labor-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The specific implementation of the utility model is further described in detail below with reference to the accompanying drawings, wherein:

[0016] Figure 1It is a schematic diagram of the combined state of the pivot structure of the pliers of the utility model;

[0017] Figure 2 It is a schematic diagram of the exploded state of the pivot structure of the pliers of the utility model;

[0018] Figure 3 This is another specific structural exploded state schematic diagram of the pliers pivot structure of the utility model;

[0019] Figure 4 It is a schematic diagram of the structure of needle-nosed pliers adopting the pliers pivot structure of the utility model;

[0020] Figure 5 It is a schematic diagram of the structure of wire cutters using the pliers pivot structure of the utility model;

[0021] Figure 1~Figure 5 Middle: 1. first pivoting part, 2. second pivoting part, 3. pivot, 4. pliers head, 5. pliers handle, 6. first arc hole, 7. second arc hole, 8. first reinforcement pin, 9. second reinforcement pin, 10. retracting cap, 11. step hole, 12. step surface, 13. cutting edge. DETAILED DESCRIPTION

[0022] The specific implementation scheme of the utility model is described in detail below in conjunction with the accompanying drawings. Example 1

[0023] like Figure 1 and Figure 2 A pliers pivot structure that can improve the labor-saving effect is shown, comprising a first pivot part 1, a second pivot part 2 and a pivot 3 of the pliers, wherein the front ends of the first pivot part 1 and the second pivot part 2 are respectively used to connect the corresponding pliers heads 4, and the rear ends are respectively used to connect the corresponding pliers handles 5, the first pivot part 1 and the second pivot part 2 are partially overlapped, the pivot 3 is connected to the front parts of the first pivot part 1 and the second pivot part 2, and the first pivot part 1 and the second pivot part 2 are respectively provided with a first arc hole 6 with the center of the pivot 3 as the center of the circle. , the second circular arc hole 7, the first circular arc hole 6 and the second circular arc hole 7 are staggered with each other, the first pivot part 1 is vertically connected with a first reinforcing pin 8 inserted into the second circular arc hole 7, and the second pivot part 2 is vertically connected with a second reinforcing pin 9 inserted into the first circular arc hole 6, the first reinforcing pin 8 is adapted to the second circular arc hole 7, and the second reinforcing pin 9 is adapted to the first circular arc hole 6, when the first pivot part 1 and the second pivot part 2 rotate relative to each other, the first reinforcing pin 8 and the second reinforcing pin 9 slide along the long diameter of the second circular arc hole 7 and the first circular arc hole 6 respectively.

[0024] When the pliers are clamping or shearing a workpiece, the pivot 3, the first reinforcing pin 8 and the second reinforcing pin 9 jointly provide a supporting force for the first pivot 1 and the second pivot 2, which can effectively reduce the shear force on the pivot 3 and prevent the pivot 3 from breaking. On this basis, the present embodiment can use a pivot 3 with a smaller diameter to hinge the first pivot 1 and the second pivot 2, and the center of the pivot 3 with a smaller diameter can be further offset toward the direction of the pliers head 4, thereby shortening the resistance arm, extending the power arm, and expanding the ratio of the power arm to the resistance arm, further improving the labor-saving effect of the pliers.

[0025] like Figure 1 As shown, the first reinforcing pin 8 and the second reinforcing pin 9 of this embodiment are cylindrical pins. In practical applications, the first reinforcing pin 8 and the second reinforcing pin 9 can also be waist-shaped pins with waist-shaped cross-sections, such as Figure 3 shown.

[0026] The advantages of using cylindrical pins are simple structure and low manufacturing cost, but since the contact surface between the first reinforcing pin 8 and the second reinforcing pin 9 and the second arc hole 7 and the first arc hole 6 is small, the pressure on the force-bearing surface is large, so it is easy to deform or wear, which affects the service life. Although the waist-shaped pin has a complex structure and increases the manufacturing cost, the waist-shaped pin has stronger shear resistance, better wear resistance and longer service life during use.

[0027] In order to improve the stability of the first pivotal part 1 and the second pivotal part 2 during relative rotation, the present embodiment further forms circular stop caps 10 radially extending outwardly at the top ends of the first reinforcement pin 8 and the second reinforcement pin 9, and the opposite ends of the first arc hole 6 and the second arc hole 7 are provided with step holes 11 cooperating with the stop caps 10, and the stop caps 10 are embedded in the step holes 11.

[0028] Through the cooperation of the stop cap 10 and the step hole 11, the fitting connection between the first pivot part 1 and the second pivot part 2 is more stable, and the first pivot part 1 and the second pivot part 2 are not prone to torsion when they rotate relative to each other, thereby improving the user experience.

[0029] In this embodiment, stepped surfaces 12 projecting toward each other are further provided on the facing surfaces of the first pivoting portion 1 and the second pivoting portion 2, respectively. The two stepped surfaces 12 abut against each other, and the pivot 3, the first arc hole 6, and the second arc hole 7 are all provided on the stepped surfaces 12. The provision of the stepped surfaces 12 increases the thickness of the first pivoting portion 1 and the second pivoting portion 2, and improves the strength of the first pivoting portion 1 and the second pivoting portion 2.

[0030] The first pivot part 1 and the second pivot part 2 need to overlap and fit together and need to rotate relative to each other, which requires that the fitting surfaces of the first pivot part 1 and the second pivot part 2 are relatively smooth. Therefore, the fitting surfaces of the first pivot part 1 and the second pivot part 2 need to be finely processed. The larger the fitting surface, the higher the processing cost. In this embodiment, the step surface 12 is provided to reduce the area that needs to be finely processed, thereby reducing the processing cost.

[0031] The working principle of this embodiment is: this embodiment utilizes the first reinforcing pin 8 and the second reinforcing pin 9 to share the shear force exerted on the pivot 3, so that the diameter of the pivot 3 can be further reduced. On the basis of further reducing the diameter of the pivot 3, the center of the pivot 3 can also be further moved toward the pliers head 4, thereby further reducing the distance between the pliers head 4 and the center of the pivot 3, expanding the ratio of the power arm to the resistance arm, and achieving the technical goal of further improving the labor-saving effect. Example 2

[0032] like Figure 1 The diagonal pliers shown include the pliers pivot structure described in the above-mentioned embodiment 1 that can improve the labor-saving effect, the front ends of the first pivot part 1 and the second pivot part 2 are respectively connected with mutually matching pliers heads 4, the opposite sides of the pliers heads 4 are respectively provided with mutually engaging cutting edges 13, and the rear ends of the first pivot part 1 and the second pivot part 2 are respectively connected with pliers handles. Example 3

[0033] like Figure 4 The shown type of needle-nosed pliers comprises the pliers pivot structure described in the above-mentioned embodiment 1 which can improve the labor-saving effect, wherein the front ends of the first pivot part 1 and the second pivot part 2 are respectively connected with mutually matching pliers heads 4, and the rear ends of the first pivot part 1 and the second pivot part 2 are respectively connected with pliers handles 5. Example 4

[0034] like Figure 5 The wire cutters shown include the pliers pivot structure described in the above embodiment 1 that can improve the labor-saving effect, the front ends of the first pivot part 1 and the second pivot part 2 are respectively connected to the pliers heads 4 that cooperate with each other, and the rear ends of the first pivot part 1 and the second pivot part 2 are respectively connected to the pliers handles 5.

[0035] The above embodiments are only illustrative of the principles and effects of the invention, as well as some embodiments of its application, and are not intended to limit the invention. It should be pointed out that a person skilled in the art can make several modifications and improvements without departing from the inventive concept of the invention, and all of these belong to the protection scope of the invention.

Claims

1. A pliers pivot structure capable of improving labor-saving effect, comprising a first pivot part (1), a second pivot part (2) and a pivot (3) of the pliers, wherein the front ends of the first pivot part (1) and the second pivot part (2) are respectively used to connect to the corresponding pliers heads (4), and the rear ends are respectively used to connect to the corresponding pliers handles (5), and the first pivot part (1) and the second pivot part (2) are partially overlapped, characterized in that: The pivot (3) is connected to the front part of the first pivot part (1) and the second pivot part (2); a first arc hole (6) and a second arc hole (7) are respectively provided on the first pivot part (1) and the second pivot part (2), with the center of the pivot (3) as the center of the circle; the first arc hole (6) and the second arc hole (7) are arranged in a staggered manner; a first reinforcing pin (8) inserted into the second arc hole (7) is vertically connected to the first pivot part (1); a second reinforcing pin (9) inserted into the first arc hole (6) is vertically connected to the second pivot part (2); the first reinforcing pin (8) is matched with the second arc hole (7), and the second reinforcing pin (9) is matched with the first arc hole (6); when the first pivot part (1) and the second pivot part (2) rotate relative to each other, the first reinforcing pin (8) and the second reinforcing pin (9) slide along the long diameter of the second arc hole (7) and the first arc hole (6) respectively.

2. The pliers pivot structure capable of improving the labor-saving effect according to claim 1, characterized in that: The first reinforcing pin (8) and the second reinforcing pin (9) are cylindrical pins or waist-shaped pins with a waist-shaped cross section.

3. The pliers pivot structure capable of improving the labor-saving effect according to claim 1, characterized in that: The top ends of the first reinforcing pin (8) and the second reinforcing pin (9) are radially extended outward to form circular stop caps (10), and the opposite ends of the first arc hole (6) and the second arc hole (7) are provided with step holes (11) that cooperate with the stop caps (10), and the stop caps (10) are embedded in the step holes (11).

4. The pliers pivot structure capable of improving the labor-saving effect according to claim 1, characterized in that: The facing surfaces of the first pivotal portion (1) and the second pivotal portion (2) are respectively provided with stepped surfaces (12) that protrude towards each other, the two stepped surfaces (12) abut against each other, and the pivot shaft (3), the first circular arc hole (6), and the second circular arc hole (7) are all provided on the stepped surfaces (12).

5. A diagonal pliers, characterized in that: The invention comprises a pliers pivot structure capable of improving the labor-saving effect as claimed in any one of claims 1 to 4, wherein the front ends of the first pivot part (1) and the second pivot part (2) are respectively connected to mutually matching pliers heads (4), the opposite sides of the pliers heads (4) are respectively provided with mutually engaging cutting edges (13), and the rear ends of the first pivot part (1) and the second pivot part (2) are respectively connected to pliers handles.

6. A needle-nosed pliers, characterized in that: The invention comprises a pliers pivot structure capable of improving the labor-saving effect as claimed in any one of claims 1 to 4, wherein the front ends of the first pivot part (1) and the second pivot part (2) are respectively connected to mutually matching pliers heads (4), and the rear ends of the first pivot part (1) and the second pivot part (2) are respectively connected to pliers handles (5).

7. A wire cutter, characterized in that: The invention comprises a pliers pivot structure capable of improving the labor-saving effect as claimed in any one of claims 1 to 4, wherein the front ends of the first pivot part (1) and the second pivot part (2) are respectively connected to mutually matching pliers heads (4), and the rear ends of the first pivot part (1) and the second pivot part (2) are respectively connected to pliers handles (5).

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