Force-saving tool

Abstract

The present invention relates to a force-saving tool, and specifically relates to a force-saving cutting, gripping or fixing tool that uses a toothed structure for separable connection to form a dual-lever mechanism, the tool comprising a working member I and a working member II which act on two sides of a structure to be gripped and are hinged by means of a pin shaft, and a connecting rod I and a connecting rod II which are configured to control the working member I and the working member II, wherein the working member I and the working member 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 member I and the teeth of the connecting rod II mesh with each other, and the teeth of the working member II and the teeth of the connecting rod I mesh with each other; and the working member I is hinged to the connecting rod I, and the working member II is hinged to the connecting rod II. The tool is force-saving to operate, and can alleviate the defect of easily causing human fatigue due to unilateral operation.

Description

Labor-saving tool TECHNICAL FIELD

[0001] The present application relates to a labor-saving tool, in particular to a labor-saving cutting, clamping or fixing tool formed by a double lever with tooth-shaped structure. BACKGROUND

[0002] Garden pruning often uses a pruning shear, for example, a conventional X-shaped scissors is used to prune thin branches, and the excess branches are pruned by operating the tail end of the handle. If thicker branches need to be pruned, a thick branch shear is usually used, for example, the thick branch shear disclosed in CN202320327394.6 invention patent, which mainly works by the cooperation of the gear and the rack to exert the same force to cut thicker branches. However, when cutting, the scissors is equivalent to one handle being fixed, and the other handle is operated to cut, which is easy to cause fatigue.

[0003] For example, some line pliers, wire pliers and other clamping and fixing tools are also conventionally provided in X shape. The X-shaped clamping and fixing tool has the defect that the length of the handle needs to be extended to save labor, but the length of the handle is affected by the operation space. Therefore, some new labor-saving clamping and fixing tools have been derived, for example, the labor-saving pliers disclosed in CN115256255A invention patent, which uses a crank to increase the length of the force arm, making it more labor-saving than existing pliers. However, such clamping tools also have the same defects as the thick branch shear disclosed in CN202320327394.6 invention patent. SUMMARY

[0004] To solve the above problems, the present application provides a labor-saving tool that can be more labor-saving when operated, and the operation process is similar to that of an X-shaped scissors, which can overcome the defect of easy fatigue of a single handle.

[0005] The present application comprises working member I and working member II that are hinged to each other and act on both sides of the structure to be clamped, and connecting rod I and connecting rod II for controlling working member I and working member II. The working member I and the working member II are provided with teeth, and the connecting rod I and the connecting rod II are also provided with teeth. The teeth of the working member I and the connecting rod II are engaged with each other, and the teeth of the working member II and the connecting rod I are engaged with each other. The working member I is hinged to the connecting rod I, and the working member II is hinged to the connecting rod II.

[0006] In use, the working member I and the working member II are respectively arranged at two sides of the structure to be clamped (for example, the branch to be pruned), the gear on the connecting rod I drives the working member II to open and close around the hinge shaft when the connecting rod I moves, the gear on the connecting rod II drives the working member I to open and close around the hinge shaft when the connecting rod II moves, meanwhile, the working member I and the connecting rod I are hinged, a screw with a thread at the tail can be arranged at the hinge position, the hinge can be realized by the nut, and the relative fixing effect can be realized at the same time, so that the connecting rod I can drive the working member I to move when the connecting rod I moves, and the connecting rod II can drive the working member II to move according to the same principle; of course, the three hinge positions can also be arranged to realize the completely free rotation, at this time, the working member I and the working member II can only rotate around the hinge shaft through the gear transmission, and the connecting rod I and the connecting rod II cannot drive the working member I and the working member II to rotate. Due to the arrangement of the gear, the opening and closing amplitude of the connecting rod I and the connecting rod II is larger than that of the X-shaped clamping tool when the working member I and the working member II open the same amplitude, and the labor can be saved when cutting or clamping.

[0007] Further, the labor-saving tool further comprises at least one reinforcing piece, the working member I and the working member II are hinged through the pin shaft I, the working member I and the connecting rod I are hinged through the pin shaft II, and the working member II and the connecting rod II are hinged through the pin shaft III; the two ends of the reinforcing piece are fixed on the pin shaft I and the pin shaft II, and / or are fixed on the pin shaft I and the pin shaft III. The reinforcing piece can prevent the working member I, the working member II, the connecting rod I and the connecting rod II from shaking, and the three hinge shafts form a triangle, so that the stability and firmness of the labor-saving tool are ensured.

[0008] Further, the hinge position is provided with a gasket, and the gasket can prevent the reinforcing piece from being abraded by the mutual friction between the reinforcing piece and the working member I, the working member II, the connecting rod I and the connecting rod II.

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

[0010] Further, the number of gears on the working member I is one more or one less than the number of gears on the working member II.

[0011] Further, in order to make the labor-saving tool more beautiful, the structure more compact, and the production cost lower, the tail of the working member I is hinged to the connecting rod I, the hinge shaft of the working member I and the connecting rod I, that is, the pin shaft II, is located below the top gear of the connecting rod I, the top of the connecting rod II is provided with a gear, the tail of the working member II is hinged to the connecting rod II, and the hinge shaft of the working member II and the connecting rod II, that is, the pin shaft III, is located below the top gear of the connecting rod II.

[0012] Further, the working part I is provided with a blade, and the working part II is provided with a rubber tooth, and the contact position between the rubber tooth and the to-be-clamped structure is sawtooth-shaped, or the working part I and the working part II are both provided with a blade, and when the blade is provided, the labor-saving tool can be used as scissors, and the rubber tooth can increase the contact area between the working part and the branch, so that the branch is fixed, the shaking of the branch is reduced, and the blade can play a shearing role, of course, the rubber tooth can be made of rubber or metal.

[0013] Further, the working part I and the working part II are both provided with a rubber tooth, a friction-resistant structure or a structure for increasing friction, and when the structure is provided, the tool can be used as a clamp or the like clamping tool, and the friction-resistant structure has an effect similar to that of the rubber tooth and can reduce the shaking of the clamped tool.

[0014] Further, the tail parts of the connecting rods I and II are used for connecting handles, and the handles are telescopic handles. The connecting rods I and II can be directly used as handles for the convenience of use in different occasions, or are used after being connected with the handles.

[0015] Compared with the prior art, the labor-saving tool has the following beneficial effects:

[0016] (1) In the case that the working part I and the working part II have the same opening as other conventional tools, the labor-saving tool can be more labor-saving than conventional clamping tools.

[0017] (2) The separation of the working part and the connecting rod can ensure that the operator is always located in the middle position of the connecting rods I and II during clamping, so that the defect that the handles are located on one side of the body during operation of the CN202320327394.6 invention and the unilateral force is easy to cause fatigue is overcome. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 is a schematic structural view of one side of an embodiment of the labor-saving tool;

[0019] Fig. 2 is a schematic view of the back of Fig. 1;

[0020] Fig. 3 is a schematic structural view of one side of another embodiment of the labor-saving tool;

[0021] Fig. 4 is a schematic view of the back of Fig. 3;

[0022] Fig. 5 is an exploded view of the embodiment 2;

[0023] Fig. 6 is an exploded view of another side of the embodiment 2;

[0024] In the figures, 1 is a working part I; 2 is a working part II; 3 is a connecting rod I; 4 is a connecting rod II; 5 is a tooth; 6 is a reinforcing piece; 7 is a pin shaft I; 8 is a pin shaft II; 9 is a pin shaft III; 10 is a rubber tooth; and 11 is a gasket. DETAILED DESCRIPTION

[0025] The following further explains the present application in combination with the drawings and examples. The directions shown in the drawings are taken as reference to Fig. 1, the left and right sides are the two ends, the upper side of Fig. 1 is the top / upper part / upper side, and the lower side of Fig. 1 is the tail / lower part / lower side. The definition of the directions is only for the convenience of understanding the present application and is not used to limit the protection scope of the present application. Embodiment

[0026] The present application is a labor-saving tool, specifically a labor-saving scissors, which can be used for pruning greenery or pruning tree branches, as shown in Figs. 1-2, comprising a working piece I 1 for shearing branches and a working piece II 2, the inner side of the working piece I 1 is provided with a blade, and the working piece II 2 is provided with a rubber tooth 10 at the position corresponding to the blade, the contact position between the rubber tooth 10 and the blade is a sawtooth structure. The working piece I 1 and the working piece II 2 are hinged through a hinge shaft I 7, which is located at the near-middle position of the length direction of the working piece I 1 and the working piece II 2. The tail of the working piece I 1 is hinged to a connecting rod I 3 through a pin shaft II 8, the tail of the working piece II 2 is hinged to a connecting rod II 4 through a pin shaft III 9, the top of the connecting rod I 3 is provided with a tooth 5, the pin shaft I 7 near the working piece II 2 is provided with a tooth 5 which is intermeshed with the tooth 5 at the top of the connecting rod I 3, the top of the connecting rod II 4 is provided with a tooth 5, and the pin shaft I 7 near the working piece I 1 is provided with a tooth 5 which is intermeshed with the tooth 5 at the top of the connecting rod II 4. At the same time, the number of the teeth 5 of the connecting rod II 4 and the working piece I 1 is two, and the number of the teeth 5 of the connecting rod I 3 and the working piece II 2 is three.

[0027] In use, the working piece I 1 and the working piece II 2 are respectively placed on both sides of the branches, the tooth 5 on the connecting rod I 3 drives the working piece II 2 to open and close around the pin shaft I 7 while the connecting rod I 3 moves, the tooth 5 on the connecting rod II 3 drives the working piece I 1 to open and close around the pin shaft I 7 while the connecting rod II 3 moves, and then the opening and closing of the working piece driven by the connecting rod is realized through the intermeshing of the two sets of intermeshing structures to realize shearing. The setting of the two sets of intermeshing structures makes the labor-saving scissors return to the original X-shaped mode, but the setting of the teeth and the transmission make it more labor-saving than the traditional X-shaped scissors, and at the same time, the operator can be located at the center line of the scissors during shearing, both hands can exert force at the same time, and the fatigue of the operator using one hand is reduced. Embodiment

[0028] This embodiment is the same as the structure of embodiment 1, except for the following features:

[0029] The pin shaft 7 and the pin shaft 8 are connected with the reinforcing sheet 6, the two ends of the reinforcing sheet 6 are fixed on the pin shaft 7 and the pin shaft 8 through the nuts, similarly, the pin shaft 7 and the pin shaft 9 are also connected with the reinforcing sheet 6, the two ends of the reinforcing sheet 6 are also fixed on the pin shaft 7 and the pin shaft 9 through the nuts. In order to prevent the friction between the working parts, the connecting rods and the reinforcing sheets, the pin shaft 7, the pin shaft 8 and the pin shaft 9 are all provided with the gaskets (not shown in the figure), the gaskets are arranged between the connecting parts and the reinforcing sheets, or arranged between the two working parts, or arranged between the working parts and the connecting rods and so on all the places where the friction loss is possible.

[0030] Meanwhile, the pin shaft 7, the pin shaft 8 and the pin shaft 9 all adopt the pin shafts provided with the threads at the tail parts, the tail parts are fixed through the nuts, the working part 1 and the connecting rod 3 are hinged, the connecting rod 3 moves at the same time, and also drives the working part 1 to move, similarly, the movement of the connecting rod 4 also drives the movement of the working part 2. Embodiment

[0031] The embodiment is the same as the structure of the embodiment 1, and has the following characteristics:

[0032] The embodiment is a labor-saving pliers, the clamping parts of the working part 1 and the working part 2 are all the wave shapes or other structures for increasing the friction force, the number of the gear teeth on the gear teeth of the working part 1, the working part 2, the connecting rod 3 and the connecting rod 4 are all two or three.

[0033]

Claims

1. A labor-saving tool comprising a working member I (1) and a working member II (2) which are hingedly connected to each other and act on both sides of a structure to be clamped, and a link I (3) and a link II (4) for controlling the working member I (1) and the working member II (2), characterized in that, The workpiece I (1) and the workpiece II (2) are provided with teeth (5), the connecting rod I (3) and the connecting rod II (4) are also provided with teeth (5), the teeth (5) of the workpiece I (1) and the connecting rod II (4) are engaged with each other, the teeth (5) of the workpiece II (2) and the connecting rod I (3) are engaged with each other, the workpiece I (1) is hinged with the connecting rod I (3), and the workpiece II (2) is hinged with the connecting rod II (4).

2. The labor saving tool of claim 1, wherein The labor-saving tool further comprises at least one reinforcing piece (6), the workpiece I (1) and the workpiece II (2) are hinged through a pin shaft I (7), the workpiece I (1) and the connecting rod I (3) are hinged through a pin shaft II (8), and the workpiece II (2) and the connecting rod II (4) are hinged through a pin shaft III (9); the two ends of the reinforcing piece (6) are fixed on the pin shaft I (7) and the pin shaft II (8) and / or the pin shaft I (7) and the pin shaft III (9).

3. The labor saving tool of claim 3, wherein The pin shaft I (7), the pin shaft II (8) and the pin shaft III (9) are provided with gaskets (11).

4. The labor saving tool of claim 1 or 2, wherein The teeth on the workpiece I (1) and the connecting rod II (4) are the same, and the number of the teeth on the workpiece II (2) and the connecting rod I (3) is the same.

5. The force multiplier tool of claim 4, wherein, The number of the teeth on the workpiece I (1) is different from the number of the teeth on the workpiece II (2).

6. The power tool of claim 1, 2, or 3, wherein the power tool is a power drill. The tail of the workpiece I (1) is hinged on the connecting rod I (3), the pin shaft II (8) is located below the top teeth (5) 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 of claim 6 wherein, The tail of the workpiece II (2) is hinged on the connecting rod II (4), the pin shaft III (9) is located below the top teeth (5) of the connecting rod II (4), and the top of the connecting rod I (3) is provided with teeth (5).

8. The force multiplier tool of claim 1, 2, or 3, wherein, The workpiece I (1) is provided with a blade, the workpiece II (2) is provided with a rubber tooth (10), and the contact position between the rubber tooth (10) and the structure to be clamped is sawtooth-shaped; or the workpiece I (1) and the workpiece II (2) are both provided with a blade, or are both provided with a rubber tooth (10), a friction-resistant structure or a structure for increasing friction.

9. The force multiplier tool of claim 1, 2, or 3, wherein, The tails of the connecting rod I (3) and the connecting rod II (4) are used for connecting a handle.

10. The labor saving tool of claim 9, wherein, The handle is a telescopic handle.

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