Labor-saving pliers

Abstract

The labor-saving pliers comprise a first pliers body and a second pliers body which are connected through a hinged shaft, a ratchet wheel assembly is arranged on the first pliers body in a rotating mode, a first pawl piece is arranged on the second pliers body, a second pawl piece is arranged on the first pliers body, and the first pawl piece and the second pawl piece are both used for being meshed with the ratchet wheel assembly in a retaining mode. The first pincer body and the second pincer body are close to each other to drive the ratchet wheel assembly, the first pawl piece and the second pawl piece to move relatively and be meshed so as to position the first pincer body and the second pincer body. According to the utility model, the ratchet wheel assembly is matched with the pawl piece for use, so that labor-saving positioning of the plier body is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of pliers, in particular to a pair of labor-saving pliers. Background Art

[0002] Pliers are commonly used hardware tools, generally including two pliers handles. The shearing function is achieved by holding the two pliers handles and moving the two pliers handles closer or farther from each other. Since the hand needs to exert force when shearing, long-term operation can easily cause hand fatigue. In order to solve such problems, some labor-saving pliers have emerged. The principles of labor-saving pliers are mainly as follows: first, the lever principle is used to convert the force applied to the handle into the force of clamping or interrupting objects, thereby reducing the force of the hand; second, the lever arm principle is used to change the design or structure of the pliers, such as increasing the length of the pliers handle to make the lever arm longer, thereby reducing the need to exert force. The first is to increase the force to achieve the purpose of labor saving; the third is to use the blade principle to change the blade shape of the pliers, such as using a bevel blade or overlapping blade design, which can reduce the force applied to the handle and further improve the labor saving effect; the fourth is to adopt an eccentric design to shorten the distance between the center wheel and the blade of the pliers, so that the axis is closer to the front end, reducing the length of the resistance arm, thereby increasing the clamping force under the same force and achieving the labor saving effect; the fifth is to use the lever structure. Through the lever structure formed by the grip and the handle and the lever effect of the pliers head itself, the force can be amplified when the grip is closed to achieve labor saving.

[0003] However, no matter which of the above-mentioned labor-saving methods is used, for operating the pliers, the hand needs to continuously exert force when clamping in order to perform operations such as shearing and clamping, which is inconvenient to use. Utility Model Content

[0004] The utility model aims to provide a labor-saving pliers to solve the above problems existing in the current labor-saving pliers.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A kind of force-saving pliers comprises a first pliers body and a second pliers body connected by a hinge shaft, a ratchet assembly is rotatably arranged on the first pliers body, a first pawl piece is arranged on the second pliers body, and a second pawl piece is arranged on the first pliers body, both the first pawl piece and the second pawl piece are used to engage with the ratchet assembly to stop retreat, and the first pliers body and the second pliers body are close to each other to drive the ratchet assembly and the first pawl piece and the second pawl piece to move relative to and engage with each other, so as to position the first pliers body and the second pliers body.

[0007] Further, the ratchet assembly includes a rotating shaft, a first ratchet and a second ratchet, the rotating shaft is rotatably set on the first pliers body, and the first ratchet and the second ratchet are both fixed on the rotating shaft, wherein the first ratchet and the second ratchet are arranged at intervals, the first pliers body is arranged on the top surface of the first pliers body, and the second pliers body is arranged on the bottom surface of the first pliers body, the first pawl member is used to engage with the first ratchet, and the second pawl member is used to engage with the second ratchet.

[0008] Furthermore, a first quadrangular prism and a second quadrangular prism are arranged on the rotating shaft along the axial direction, a first square hole is arranged on the first ratchet wheel, a second square hole is arranged on the second ratchet wheel, the first quadrangular prism is inserted in the first square hole, and the second quadrangular prism is inserted in the second square hole.

[0009] Furthermore, a plurality of first stop pawls are arranged on the first pawl member, and the first stop pawls are used to engage with the first ratchet wheel. A first torsion spring is arranged on the second pliers body, and the first pawl member is close to the first ratchet wheel through the first torsion spring so that the first stop pawl engages with the first ratchet wheel.

[0010] Furthermore, a first unlocking member is provided on the first pawl member, and the first unlocking member is used to drive the first stop pawl to disengage from the engagement with the first ratchet wheel.

[0011] Furthermore, a limit lock block is provided on the second pliers body, and a corresponding limit portion is provided on the first pawl member, and the limit lock block is used to be engaged in the limit portion to disengage the first stop pawl from meshing with the first ratchet wheel.

[0012] Furthermore, a second stop pawl is provided at the end of the second pawl member, and the second stop pawl is used to engage with the second ratchet wheel. A second torsion spring is provided on the first pliers body, and the second pawl member is close to the second ratchet wheel through the second torsion spring so that the second stop pawl engages with the second ratchet wheel.

[0013] Furthermore, a second unlocking member is provided on the second pawl member, and the second unlocking member is used to drive the second stop pawl to disengage from the engagement with the second ratchet wheel.

[0014] Beneficial effects of the utility model:

[0015] The labor-saving pliers of the utility model, through the cooperation of the ratchet assembly and the pawl, can keep the pliers body in a stable clamping state without continuous force when performing operations such as clamping, shearing, and clamping. This design effectively reduces the burden on the user's hands and reduces the degree of hand fatigue, making long-term operation easier and more efficient. The anti-retraction effect of the ratchet pawl enables the pliers body to be automatically locked in the clamping state, without the user having to continuously apply force, thereby achieving a labor-saving effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a front view of the labor-saving pliers of the utility model;

[0017] Figure 2 It is a rear view of the labor-saving pliers of the utility model;

[0018] Figure 3 It is a three-dimensional diagram (exploded diagram) of the labor-saving pliers of the utility model;

[0019] Figure 4 yes Figure 3 A schematic diagram of the structure from another angle;

[0020] Figure 5 It is a structural schematic diagram (explosion diagram) of a ratchet assembly in the labor-saving pliers of the utility model.

[0021] The names corresponding to the marks in the figure are:

[0022] Hinge shaft 1, first pliers body 2, second pliers body 3, ratchet assembly 4, rotating shaft 41, first quadrangular prism 411, second quadrangular prism 412, first ratchet 42, first square hole 421, second ratchet 43, second square hole 431, first pawl member 5, first stop pawl 51, first torsion spring 52, first unlocking member 53, second pawl member 6, second stop pawl 61, second torsion spring 62, second unlocking member 63, limiting lock block 7. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0024] The utility model provides a labor-saving pliers, aiming to solve the problem that the hands need to exert continuous force during operations such as clamping, shearing and clamping of traditional pliers, and realizes labor-saving positioning of the pliers body through the coordinated use of the ratchet assembly and the pawl member.

[0025] like Figure 1 - Figure 5 As shown, the labor-saving pliers of the utility model include a first pliers body 2 and a second pliers body 3 connected by a hinge shaft 1, a ratchet assembly 4 is rotatably provided on the first pliers body 2, and a first ratchet member 5 and a second ratchet member 6 are provided on the second pliers body 3.

[0026] Figure 4 and Figure 5 As shown, the ratchet assembly 4 includes a rotating shaft 41, a first ratchet 42 and a second ratchet 43. The rotating shaft 41 is rotatably set on the first pliers body 2. The first ratchet 42 and the second ratchet 43 are both fixed on the rotating shaft 41 and are spaced apart. The first ratchet 42 is located on the top surface of the first pliers body 2, and the second ratchet 43 is located on the bottom surface of the first pliers body 2.

[0027] The rotating shaft 41 is provided with a first quadrangular prism 411 and a second quadrangular prism 412 along the axial direction, the first ratchet 42 is provided with a first square hole 421, and the second ratchet 43 is provided with a second square hole 431. The first quadrangular prism 411 is inserted into the first square hole 421, and the second quadrangular prism 412 is inserted into the second square hole 431, so as to realize the fixed connection between the ratchet and the rotating shaft.

[0028] Figure 1 and Figure 3 As shown, a plurality of first stop pawls 51 are arranged on the first pawl member 5, and these first stop pawls 51 are used to mesh with the first ratchet 42. A first torsion spring 52 is provided on the second caliper body 3, and the first pawl member 5 is close to the first ratchet 42 through the first torsion spring 52, so that the first stop pawl 51 and the first ratchet 42 are kept in meshing state. The first pawl member 5 is also provided with a first unlocking member 53, which is used to drive the first stop pawl 51 to disengage from the meshing with the first ratchet 42.

[0029] Figure 2 and Figure 4 As shown, the end of the second pawl member 6 is provided with a second stop pawl 61 for engaging with the second ratchet 43. A second torsion spring 62 is provided on the first caliper body 2, and the second pawl member 6 is close to the second ratchet 43 through the second torsion spring 62, so that the second stop pawl 61 and the second ratchet 43 are kept in an engaged state. The second pawl member 6 is also provided with a second unlocking member 63 for driving the second stop pawl 61 to disengage from the second ratchet 43.

[0030] Figure 1 As shown, the second clamp body 3 is also provided with a limit lock block 7, and the first pawl member 5 is provided with a corresponding limit portion 54. When unlocking is required, the limit lock block 7 can be engaged in the limit portion 54, so that the first pawl member 5 moves as a whole, thereby driving the first stop pawl 51 to disengage from the first ratchet wheel 42.

[0031] Working principle:

[0032] When it is necessary to clamp or shear an object, the user first moves the first pliers body 2 and the second pliers body 3 closer to each other by hand. As the two are closer, the ratchet assembly 4 also rotates, and the stop pawls on the first pawl member 5 and the second pawl member 6 respectively engage with the first ratchet 42 and the second ratchet 43 to achieve the positioning of the pliers. At this time, due to the stop effect of the ratchet pawls, the user can maintain the clamping state of the pliers without continuous force.

[0033] When the clamping needs to be released, the user can respectively drive the first stop pawl 51 and the second stop pawl 61 to disengage from the ratchet wheel by operating the first unlocking member 53 and the second unlocking member 63. At the same time, the first pawl member 5 can be moved as a whole by operating the limit lock block 7, so as to quickly release the clamping state.

[0034] Through the above-mentioned implementation mode, the labor-saving pliers of the utility model realize labor-saving positioning during operations such as clamping, shearing, and clamping, effectively reducing the burden on the user's hands and improving work efficiency.

[0035] Obviously, the described embodiments are only a part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field belong to the protection scope of the utility model.

Claims

1. A labor-saving pliers, characterized in that: It includes a first pliers body and a second pliers body connected by a hinge shaft, a ratchet assembly is rotatably arranged on the first pliers body, a first pawl member is arranged on the second pliers body, and a second pawl member is arranged on the first pliers body, both the first pawl member and the second pawl member are used to engage with the ratchet assembly to stop retreat, and the first pliers body and the second pliers body are close to each other to drive the ratchet assembly and the first pawl member and the second pawl member to move relative to and engage with each other, so as to position the first pliers body and the second pliers body.

2. The labor-saving pliers according to claim 1, characterized in that: The ratchet assembly includes a rotating shaft, a first ratchet and a second ratchet, the rotating shaft is rotatably set on the first pliers body, the first ratchet and the second ratchet are both fixed on the rotating shaft, wherein the first ratchet and the second ratchet are arranged at intervals, the first pliers body is arranged on the top surface of the first pliers body, the second pliers body is arranged on the bottom surface of the first pliers body, the first pawl member is used to engage with the first ratchet, and the second pawl member is used to engage with the second ratchet.

3. The labor-saving pliers according to claim 2, characterized in that: A first quadrangular prism and a second quadrangular prism are arranged on the rotating shaft along the axial direction, a first square hole is arranged on the first ratchet wheel, a second square hole is arranged on the second ratchet wheel, the first quadrangular prism is inserted in the first square hole, and the second quadrangular prism is inserted in the second square hole.

4. The labor-saving pliers according to claim 3, characterized in that: A plurality of first stop pawls are arranged on the first pawl member, and the first stop pawls are used to engage with the first ratchet wheel. A first torsion spring is arranged on the second pliers body, and the first pawl member is brought close to the first ratchet wheel through the first torsion spring so that the first stop pawl engages with the first ratchet wheel.

5. The labor-saving pliers according to claim 4, characterized in that: The first pawl member is provided with a first unlocking member, and the first unlocking member is used to drive the first stop pawl to disengage from the engagement with the first ratchet wheel.

6. The labor-saving pliers according to claim 5, characterized in that: The second pliers body is provided with a limit lock block, the first pawl is provided with a corresponding limit portion, and the limit lock block is used to be engaged in the limit portion to disengage the first stop pawl from the engagement with the first ratchet wheel.

7. The labor-saving pliers according to claim 2, characterized in that: A second stop pawl is provided at the end of the second pawl member, and the second stop pawl is used to engage with the second ratchet wheel. A second torsion spring is provided on the first pliers body, and the second pawl member is close to the second ratchet wheel through the second torsion spring so that the second stop pawl engages with the second ratchet wheel.

8. The labor-saving pliers according to claim 7, characterized in that: The second pawl member is provided with a second unlocking member, and the second unlocking member is used to drive the second stop pawl to disengage from the engagement with the second ratchet wheel.

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