Labor-saving tool

Abstract

The utility model relates to a labor-saving tool, in particular to a labor-saving shearing, clamping or fixing tool which adopts a tooth-shaped structure to realize split connection so as to form double levers. The clamping mechanism comprises a work piece I and a work piece II which act on two sides of a structure to be clamped and are hinged through a pin shaft, and a connecting rod I and a connecting rod II which are used for controlling the work piece I and the work piece II, and is characterized in that teeth are arranged on the work piece I and the work piece II, and teeth are also arranged on the connecting rod I and the connecting rod II; teeth of the work piece I are meshed with teeth of the connecting rod II, teeth of the work piece II are meshed with teeth of the connecting rod I, the work piece I is hinged to the connecting rod I, and the work piece II is hinged to the connecting rod II. According to the utility model, the operation is labor-saving, and the defect that one-side operation is easy to cause fatigue of people can be relieved.

Description

Technical Field

[0001] The utility model relates to a labor-saving tool, in particular to a labor-saving shearing, clamping or fixing tool which adopts a tooth-shaped structure to realize split connection and thus form a double lever. Background Art

[0002] A type of pruning shear is often used for garden pruning. For example, conventional X-shaped scissors are often used to prune plants with thinner branches, and the excess branches and leaves are trimmed by operating the tail end of the handle. If it is necessary to prune plants with thicker branches, thick branch shears are often used. For example, the thick branch shears disclosed in the utility model patent CN202320327394.6. The main principle is that the gear and rack cooperate with each other to apply the same force, so that thicker branches can be cut. However, when cutting with this type of scissors, it is equivalent to fixing one handle and cutting by operating the other handle, which can easily make people tired.

[0003] Another example is some clamping and fixing tools such as crimping pliers and wire cutters, which are conventionally set in an X shape. The disadvantage of X-shaped clamping and fixing tools is that if you want to save effort, you can only extend the handle, but the length of the handle will be affected by the operating space. For this reason, some new types of labor-saving clamping and fixing tools have been developed. For example, the labor-saving pliers disclosed in the invention patent CN115256255A use a crank to increase the length of the lever arm, which is more labor-saving when used than the pliers of the prior art. However, this type of clamping tool also has the disadvantages of the pruning shears disclosed in the utility model patent CN202320327394.6. Utility Model Content

[0004] In order to solve the above problems, the present invention provides a pair of scissors that can be operated more labor-savingly and has an operation process similar to that of X-shaped scissors, and can use two handles to exert force together to overcome the defect that a single-side handle is easily fatigued.

[0005] The utility model includes a working piece I and a working piece II which are hinged to each other and act on both sides of a structure to be clamped, and a connecting rod I and a connecting rod II which are used to control the working piece I and the working piece II. The working piece I and the working piece II are both provided with teeth, and the connecting rod I and the connecting rod II are also provided with teeth. The teeth of the working piece I and the connecting rod II are meshed with each other, and the teeth of the working piece II and the connecting rod I are meshed with each other. The working piece I extends downward and is hinged to the connecting rod I on a pin shaft II. The working piece II extends downward and is hinged to the connecting rod II on a pin shaft III.

[0006] When in use, working piece I and working piece II are respectively placed on both sides of the structure to be clamped (for example, a branch to be pruned). When connecting rod I moves, the teeth on connecting rod I drive working piece II to open and close around the hinge axis. When connecting rod II moves, the teeth on connecting rod II drive working piece I to open and close around the hinge axis. At the same time, working piece I and connecting rod I are hinged. A screw with a threaded tail can be used at the hinge position. The nut can be used to achieve hinge connection and can play a relative fixing role. It can make connecting rod I move while driving working piece I to move. By the same token, the movement of connecting rod II will also drive the movement of working piece II. Of course, the three hinge positions can also achieve completely free rotation through the setting of the hinge axis. At this time, working piece I and working piece II can only rotate around the hinge axis through the transmission of the teeth, and the movement of connecting rod I and connecting rod II can no longer drive working piece I and working piece II to rotate. Due to the setting of the teeth, when the working piece I and the working piece II are opened to the same extent, the opening and closing range of the connecting rod I and the connecting rod II is larger than that of the X-shaped clamping tool, which saves more effort when shearing or clamping.

[0007] Furthermore, the labor-saving tool includes at least one reinforcement plate. Working member I and working member II are hingedly connected by pin I. Working member I extends downwardly and is hingedly connected to connecting rod I by pin II. Working member II extends downwardly and is hingedly connected to connecting rod II by pin III. The two ends of the reinforcement plate are fixed to pins I and II, and / or to pins I and III. The reinforcement plate prevents working member I, working member II, and connecting rods I and II from shaking. The three hinge axes form a triangle, ensuring the stability and firmness of the labor-saving tool.

[0008] Furthermore, a gasket is provided at the hinged position, and the function of the gasket is to prevent wear caused by friction between the reinforcement plate and the working piece I, the working piece II, and the connecting rod I and the connecting rod II.

[0009] Furthermore, the number of teeth on the working member I and the connecting rod II is the same, the number of teeth on the working member II and the connecting rod I is the same, and the number of teeth on the working member I and the working member II can be the same or different. The different number of teeth can make the opening speed of the working member I and the working member II different.

[0010] Furthermore, the number of teeth on the workpiece I is 1 more or 1 less than the number of teeth on the workpiece II.

[0011] Furthermore, in order to make the labor-saving tool more beautiful, more compact and have lower production costs, the tail of the working part I is hinged to the connecting rod I, and the hinge axis of the working part I and the connecting rod I, namely the pin shaft II, is located on the lower side of the teeth at the top of the connecting rod I, and the top of the connecting rod II is provided with teeth. The tail of the working part II is hinged to the connecting rod II, and the hinge axis of the working part II and the connecting rod II, namely the pin shaft III, is located on the lower side of the teeth at the top of the connecting rod II.

[0012] Furthermore, the working piece I is provided with a blade, and the working piece II is provided with a rubber tooth, and the contact position between the rubber tooth and the structure to be clamped is serrated, or both the working piece I and the working piece II are provided with blades. When the blades are provided, the labor-saving tool can be used as scissors. The provision of the rubber tooth can increase the contact area between the working piece and the branch, facilitate the fixing of the branch, reduce the shaking of the branch, and facilitate the blade to play a shearing role. Of course, the rubber tooth can be made of rubber or metal.

[0013] Furthermore, both the working piece I and the working piece II are provided with rubber teeth. When this setting is made, the tool can be used as a clamping tool such as pliers. The role of the friction-resistant structure is similar to that of the rubber teeth, which can reduce the shaking of the clamped tool.

[0014] Furthermore, the tails of the connecting rods I and II are used to connect handles, which are retractable handles. To facilitate use in different occasions, the connecting rods I and II can be used directly as handles, or connected to handles for use.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] (1) The present invention can save more effort than conventional clamping tools when the openings of working piece I and working piece II are the same as those of other conventional tools;

[0017] (2) The separate arrangement of the working piece and the connecting rod enables the operator to always be located in the middle position between connecting rods I and II during clamping, thus overcoming the defect of the utility model patent CN202320327394.6 in which the handle is located on one side of the body during operation, which leads to fatigue easily due to unilateral force. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of one side of Example 1 of the utility model;

[0019] Figure 2 for Figure 1 Schematic diagram on the back;

[0020] Figure 3 This is a schematic diagram of the structure of one side of Example 2 of the present utility model;

[0021] Figure 4 for Figure 3 Schematic diagram on the back;

[0022] Figure 5 This is an exploded view of Example 2;

[0023] Figure 6 This is another side exploded view of Example 2;

[0024] Among them, 1-working part I; 2-working part II; 3-connecting rod I; 4-connecting rod II; 5-tooth; 6-reinforcement plate; 7-pin shaft I; 8-pin shaft II; 9-pin shaft III; 10-rubber tooth; 11-gasket. DETAILED DESCRIPTION

[0025] The present invention will be further explained below with reference to the accompanying drawings and embodiments. Figure 1 For reference, the left and right sides are the ends. Figure 1 The upper side is the top / upper part / upper side, Figure 1 The lower side is the tail / lower part / lower side. The definition of this orientation is only for the convenience of understanding the present invention and is not used to limit the scope of protection of the present invention.

[0026] Example 1

[0027] A labor-saving tool, in particular a labor-saving scissors, can be used to trim green bushes or prune tree branches, such as Figure 1-2 As shown, it includes a working piece I1 and a working piece II2 for shearing branches. Working piece I1 is provided with a blade on its inner side, and working piece II2 is provided with a rubber thread 10 at a position corresponding to the blade. The contact position of the rubber thread 10 with the blade is a serrated structure. Working piece I1 and working piece II2 are hinged by hinge shaft I7, which is located near the middle of the length direction of working piece I1 and working piece II2. The tail of working piece I1 extends downward and is hinged to connecting rod I3 through pin shaft II8. The tail of working piece II2 extends downward and is hinged to connecting rod II4 through pin shaft III9. Connecting rod I3 is provided with teeth 5 at the top. Working piece II2 is provided with teeth 5 near pin shaft I7, which mesh with the teeth 5 at the top of connecting rod I3. Connecting rod II4 is also provided with teeth 5 at the top. Working piece I1 is provided with teeth 5 near pin shaft I7, which mesh with the teeth 5 at the top of connecting rod II4. Meanwhile, the number of teeth 5 on the connecting rod II4 and the working piece I1 is two, and the number of teeth 5 on the connecting rod I3 and the working piece II2 is three.

[0028] During use, working piece I1 and working piece II2 are placed on either side of the branch, respectively. As connecting rod I3 moves, the teeth 5 on connecting rod I3 drive working piece II2 to open and close around pin I7. Similarly, as connecting rod II3 moves, the teeth 5 on connecting rod II3 drive working piece I1 to open and close around pin I7. Thus, through the two sets of meshing structures, the connecting rod drives the working pieces to open and close, achieving shearing. The two sets of meshing structures return the labor-saving scissors to their original X-shaped form, but the teeth's arrangement and transmission make them more labor-saving than traditional X-shaped scissors. Furthermore, the operator can remain at the center line of the scissors during shearing, applying force with both hands simultaneously, reducing fatigue from single-handed exertion.

[0029] Example 2

[0030] This embodiment has the same structure as the first embodiment except for the following features:

[0031] Pins I7 and II8 are connected to reinforcement plates 6, with both ends secured to them via nuts. Similarly, pins I7 and III9 are also connected to reinforcement plates 6, with both ends secured to them via nuts. To prevent friction between the working parts, between the connecting rods, and between the connecting rods and the reinforcement plates, pins I7, II8, and III9 are all equipped with washers. These washers are placed between the connecting parts and the reinforcement plates, between the two working parts, between the working parts and the connecting rods, and in all other locations where friction loss may occur.

[0032] At the same time, pin shaft I7, pin shaft II8 and pin shaft III9 all use pin shafts with threads at the tail, which are fixed by nuts. The working part I1 and connecting rod I3 are hinged. When connecting rod I3 moves, it will also drive the working part I1 to move. By the same token, the movement of connecting rod II4 will also drive the movement of working part II2.

[0033] Example 3

[0034] This embodiment has the same structure as the first embodiment except for the following features:

[0035] This embodiment is a labor-saving wire cutter. The clamping parts of the working piece I1 and the working piece II2 are all wavy or have other structures that increase friction. The number of teeth on the teeth of the working piece I1, the working piece II2, the connecting rod I3, and the connecting rod II4 are two or three.

Claims

1. A labor-saving tool comprising a mutually hinged working piece I (1) and a working piece II (2) acting on both sides of a structure to be clamped, and a connecting rod I (3) and a connecting rod II (4) for controlling the working piece I (1) and the working piece II (2), characterized in that: The working piece I (1) and the working piece II (2) are both provided with teeth (5), and the connecting rod I (3) and the connecting rod II (4) are also provided with teeth (5). The teeth (5) of the working piece I (1) and the connecting rod II (4) are meshed with each other, and the teeth (5) of the working piece II (2) and the connecting rod I (3) are meshed with each other. The working piece I (1) extends downward and is hinged to the connecting rod I (3) at the pin shaft II (8), and the working piece II (2) extends downward and is hinged to the connecting rod II (4) at the pin shaft III (9).

2. The labor-saving tool according to claim 1, characterized in that: The labor-saving tool further comprises at least one reinforcing plate (6), wherein the working piece I (1) and the working piece II (2) are hinged via a pin shaft I (7), the working piece I (1) and the connecting rod I (3) are hinged via a pin shaft II (8), and the working piece II (2) and the connecting rod II (4) are hinged via a pin shaft III (9); both ends of the reinforcing plate (6) are fixed on the pin shaft I (7) and the pin shaft II (8), and / or fixed on the pin shaft I (7) and the pin shaft III (9).

3. The labor-saving tool according to claim 2, characterized in that: Gaskets (11) are provided on the pin shaft I (7), the pin shaft II (8) and the pin shaft III (9).

4. The labor-saving tool according to claim 1 or 2, characterized in that: The teeth on the working piece I (1) and the connecting rod II (4) are the same, and the number of teeth on the working piece II (2) and the connecting rod I (3) is the same.

5. The labor-saving tool according to claim 4, characterized in that: The number of teeth on the working piece I (1) is different from the number of teeth on the working piece II (2).

6. The labor-saving tool according to claim 1 or 2, characterized in that: The tail of the working piece I (1) is hinged on the connecting rod I (3), the pin II (8) is located on the lower side of the teeth (5) at the top of the connecting rod I (3), and the top of the connecting rod II (4) is provided with teeth (5).

7. The labor-saving tool according to claim 6, characterized in that: The tail of the working piece II (2) is hinged on the connecting rod II (4), the pin III (9) is located on the lower side of the teeth (5) at the top of the connecting rod II (4), and the top of the connecting rod I (3) is provided with teeth (5).

8. The labor-saving tool according to claim 1, 2 or 3, characterized in that: The working piece I (1) is provided with a blade, and the working piece II (2) is provided with a rubber tooth (10), and the contact position of the rubber tooth (10) with the structure to be clamped is serrated; or the working piece I (1) and the working piece II (2) are both provided with a blade, or both are provided with a rubber tooth (10).

9. The labor-saving tool according to claim 1, 2 or 3, characterized in that: The tails of the connecting rod I (3) and the connecting rod II (4) are used to connect the handles.

10. The labor-saving tool according to claim 9, characterized in that: The handle is a retractable handle.

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