Limiting opening pliers

Abstract

The utility model discloses a limit open mouth pliers relates to pliers technical field, including fixed plier body, movable plier body, fixed plier handle and movable plier handle, the fixed plier body includes fixed jaw and symmetrically set up in the mounting plate of fixed jaw both sides, the movable plier body is installed in the mounting plate, the fixed plier handle is fixed plier body, the movable plier body is fixed plier body, the movable plier body is fixed plier body, and the movable plier body is fixed plier body. A pull connecting piece is arranged between the end part of the movable clamp handle and the movable clamp body, a limiting connecting piece is arranged between the movable clamp handle and the mounting plate at the mounting position of the pull connecting piece on the movable clamp handle, and an abutting plate is rotationally arranged on the movable clamp handle, so that the abutting plate can be directly operated during pulling; the jaw can be kept in the open state through the abutting plate so that the mouth mold can be conveniently replaced, meanwhile, the limiting piece used for fixing the mouth mold is arranged at the position of the jaw, the mouth mold can be prevented from moving, and the mouth mold can be rapidly replaced.

Description

Technical Field

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

[0002] Among the existing tools for workers, many workers need to use pliers. There are many types of existing pliers. One of the more common pliers is used in conjunction with a die. By coordinating with different types of dies, the pliers can be used to work on workpieces of different sizes at any time. Since the jaws of this type of existing pliers will automatically close when they are opened, it is necessary to continuously move the pliers handle to keep the jaws open when changing the die. The die of the jaws needs to be changed while the jaws are pulled. Since the jaws need to be kept open and the die needs to be changed, the operation is very inconvenient. Utility Model Content

[0003] Purpose of the utility model: The technical problem to be solved by the utility model is to provide a limited opening pliers, which solves the problem that the existing pliers for replacing the mouth mold cannot maintain the jaws in the open state.

[0004] Technical Solution

[0005] In order to solve the above problems, the technical solution provided by the present invention is:

[0006] A limited opening pliers comprises a fixed pliers body, a movable pliers body, a fixed pliers handle and a movable pliers handle, the fixed pliers body comprises a fixed jaw and mounting plates symmetrically arranged on both sides of the fixed jaw, the movable pliers body is mounted in the mounting plate, a pulling connecting piece is provided between the end of the movable pliers handle and the movable pliers body, a limiting connecting piece is provided between the movable pliers handle and the mounting plate at the mounting position of the pulling connecting piece on the movable pliers handle, and an abutment plate is rotatably provided on the movable pliers handle.

[0007] Furthermore, the abutment plate abuts against the mounting plate while maintaining the fixed caliper body and the movable caliper body in an open state.

[0008] Furthermore, a side connecting piece is provided between the fixed clamp handle and the movable clamp handle.

[0009] Furthermore, a torsion spring is provided on the pulling connection member located on the fixed clamp handle, and two supporting interfaces are provided on the torsion spring. One side of the supporting interface is fixedly connected to the movable clamp body, and the other side is arranged in the fixed clamp handle.

[0010] Furthermore, the fixed clamp body is provided with reinforcing nails.

[0011] Furthermore, both the fixed caliper body and the movable caliper body are provided with elastic limiting pins, which pass through the fixed caliper body and the movable caliper body, and one side of the fixed caliper body and the movable caliper body is provided with a spring that cooperates with the end of the elastic limiting pin.

[0012] Furthermore, a die is installed in the jaws of the fixed pliers body and the jaws of the movable pliers body.

[0013] Furthermore, the die on the movable caliper body abuts against the side surface of the mounting plate of the fixed caliper body.

[0014] Beneficial effects

[0015] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects:

[0016] The technical solution provided by the utility model is to set an abutment plate on the movable clamp handle, and to complete the restriction of the movable clamp handle by rotating the abutment plate after the jaws are opened. The abutment plate can be rotated manually, and because it is set on the movable clamp handle, it is convenient to directly operate the abutment plate when pulling. The jaws can be maintained in an open state through the abutment plate to facilitate the replacement of the die. At the same time, a limiter for fixing the die is set at the jaw position, which can prevent the die from moving and enable the die to be replaced quickly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic structural diagram of Example 1 of the present utility model;

[0018] Figure 2 This is a cross-sectional view of the jaws of Example 1 of the present invention;

[0019] Figure 3 This is a closed cross-sectional view of the jaws of Example 1 of the present utility model;

[0020] Figure 4 This is a schematic diagram of the switching of the abutment plate in Example 1 of the present utility model;

[0021] Figure 5 This is a schematic diagram of the coordination of the elastic limiting pin 23 of Example 1 of the present utility model;

[0022] Figure 6 This is a cross-sectional view of the limiting pin 23 of Example 1 of the present utility model. DETAILED DESCRIPTION

[0023] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0024] Example 1

[0025] Combined with attachment Figure 1-6 A limited opening pliers is used to keep the existing pliers body in a state and facilitate the replacement of the jaw die. The pliers body as a whole is composed of a fixed pliers body 10 and a movable pliers body 11 for installing the die, a fixed pliers handle 12 fixed at the end of the fixed pliers body 10, and a movable pliers handle 13 that drives the movable pliers body 11 to open and close. The movable pliers body 11 and the fixed pliers body 10 form the jaws, and the fixed pliers handle 12 and the movable pliers handle 13 are both hollow structures.

[0026] Mounting plates 20 are provided on both sides of the fixed caliper body 10. The mounting plates 20 extend from both sides of the fixed caliper body 10 to one side and are symmetrically arranged. An installation space is formed between the symmetrical mounting plates 20 for installing relevant power and limiting components that drive the movable caliper body 11 and the fixed caliper body 10 to open and close. The movable caliper body 11 cooperates with the fixed caliper body 10 and is rotatably installed on the fixed caliper body 10. The movable caliper body 11 rotates around the fixed caliper body 10 to realize the opening and closing of the fixed caliper body 10 and the movable caliper body 11.

[0027] A plurality of connectors are provided in the installation space formed by the symmetrical mounting plate 20, each connector consisting of shafts rotatably arranged at both ends and a connecting rod connected between the connecting shafts at both ends. In other embodiments, the shafts at both ends can be replaced with rivets, and the connector only needs to satisfy that the shaft for connection at one end drives the connecting rod to rotate around the shaft for connection at the other end.

[0028] The connecting parts include a pulling connecting part 14, a limiting connecting part 15, and a side connecting part 16. The pulling connecting part 14, the limiting connecting part 15, and the side connecting part 16 all have one end set on the movable clamp handle 13. The pulling connecting part 14, the limiting connecting part 15, and the side connecting part 16 are used to move the movable clamp handle 13 and limit the moving direction of the movable clamp handle 13, thereby driving the movable clamp body 11 to rotate around the fixed clamp body 10. At this time, the fixed clamp body 10 and the movable clamp body 11 are opened to form a jaw.

[0029] One end of the pulling connection member 14 is located at the end of the movable clamp handle 13, and the other end is installed on the end of the movable clamp body 10; one end of the limiting connection member 16 is installed on the end of the movable clamp handle 13, and the other end of the limiting connection member 16 is installed on the mounting plate 20 in the mounting space, and the end of the limiting connection member 16 installed on the movable clamp handle 13 and the end of the pulling connection member 14 installed on the movable clamp handle 13 are arranged at the same position, and the side on which the limiting connection member 15 is installed on the mounting plate 20 is located on the side away from the fixed clamp handle 12; one end of the side connection member 16 is installed on the movable clamp handle 13, and the other end is installed on the fixed clamp handle 12. At the same time, the end portion of the fixed clamp handle 10 is fixedly installed in the mounting space between the mounting plates 20, and the end of the side connection member 16 installed on the movable clamp handle 13 is located on the outside of the end of the pulling connection member 14 installed on the movable clamp handle 13.

[0030] By pulling the connecting piece 14, the limiting connecting piece 15 and the side connecting piece 16 together, the user only needs to pull the movable clamp handle 13 outward to move the movable clamp handle 13 a certain distance away from the jaws along a curved track. The housing pulls the movable clamp body 11 to rotate clockwise around the fixed clamp body 10, thereby opening the movable clamp body 11 and the fixed clamp body 10.

[0031] At the same time, when the movable clamp handle 13 retracts, the movable clamp body 11 rotates around the fixed clamp body 10 , and the movable clamp body 11 and the fixed clamp body 10 are closed again.

[0032] The limit connecting member 16 is mounted on a shaft connected to one end of the fixed pliers handle 12 and is provided with a torsion spring. The torsion spring is sleeved on the shaft connected to the lower limit connecting member 16 on the fixed pliers handle 12. At the same time, the torsion spring extends out of two supporting interfaces, one end of which is connected to the movable pliers body 11 and the other end is arranged in the fixed pliers handle 12. As a result, the movable pliers body 11 rotates clockwise around the fixed pliers body 10. When the user pulls the movable pliers handle 13 to open the jaws, the torsion spring is compressed and has an elastic force. When the user stops pulling the movable pliers handle 13, the torsion spring releases the elastic force, causing the movable pliers handle 13 to retract, thereby automatically closing the jaws.

[0033] The abutment plate 21 is installed on the side of the movable clamp handle 13, which is convenient for keeping the jaws in the normally open state and eliminating the need for the user to keep pulling the movable clamp handle 13. The abutment plate 21 abuts against the mounting plate 20, thereby blocking the retraction of the movable clamp body 13, making it impossible for the movable clamp body 13 to retract and keep the jaws in the state of being opened; the abutment plate 21 rotates around one end, and when the jaws do not need to be kept in the normally open state, the abutment plate 21 does not need to rotate, and the side with the rotating structure is close to the jaws, and the abutment plate 21 is away from the jaws. At this time, when the user no longer pulls the movable clamp handle 13, the abutment plate 21 will not contact the mounting plate 20, thereby not causing any interference with the movable clamp body 13. The abutment plate 21 is installed on the side of the movable clamp handle 13, which is convenient for direct operation when the movable clamp handle 13 is pulled open.

[0034] When the jaws need to remain in a normally open state, after pulling the movable clamp handle 13, the user manually rotates the abutment plate 21, which rotates 180 degrees around the rotating structure, so that the abutment plate 21 abuts the mounting plate 20. At this time, the movable clamp handle 13 cannot retract, thereby keeping the jaws open. The mounting structure of the abutment plate 21 can be selected as an integral rotating shaft, or a modular rivet or other structural component, which is installed on the side end of the abutment plate 21 to enable the abutment plate 21 to rotate. At the same time, a certain damping can be provided to prevent the abutment plate 21 from swinging on its own and provide a good rotation feel.

[0035] A mouth die 19 is installed in the jaw position of the fixed jaw body 10 and the movable jaw body 11. The jaw positions of the fixed jaw body 10 and the movable jaw body 11 have a structure that engages with the mouth die, which facilitates the engagement of the fixed jaw body 10 and the movable jaw body 11 with the mouth die. Elastic limiting pins 23 are provided on the fixed jaw body 10 and the movable jaw body 11. The elastic limiting pins 23 are used to limit the mouth die so that the mouth die is not easy to fall off from the fixed jaw body 10 and the movable jaw body 11.

[0036] The elastic limiting nail 23 is respectively installed in the fixed clamp body 10 and the movable clamp body 11 to assist in replacing the die and prevent the die from moving during replacement. The elastic limiting nail 23 is composed of a nail body and an outward-flashing end arranged at both ends of the nail body. A through hole for installing the elastic limiting nail 23 is provided in the fixed clamp body 10 and the movable clamp body 11. The nail body of the elastic limiting nail 23 passes through the through hole and is arranged in the through hole. One end of the through hole in the fixed clamp body 10 and the movable clamp body 11 is directly penetrated into an opening, and the other end is provided with a local opening smaller than the inner diameter of the through hole for passing the nail body of the elastic limiting nail 23. A spring is sleeved on the elastic limiting nail 23, and one end of the spring is in contact with the outward-flashing end of the elastic limiting nail 23 The user can press the outward-expanded end of the elastic limiting nail 23 at one end of the partial opening to move the outward-expanded end close to the partial opening. At this time, the elastic limiting nail 23 is open, and the user can replace the mouth die installed in the fixed clamp body 10 and the movable clamp body 11. After the installation is completed, the user only needs to release the squeezing of the elastic limiting nail 23. Under the elastic force of the spring, the outward-expanded end of the elastic limiting nail 23 on the side of the partial opening is pressed back on the mouth die. At this time, the outward-expanded end of the elastic limiting nail 23 forms a restrictive effect on the mouth die, so that the mouth die cannot move.

[0037] The die is provided with a stepped notch that matches the outward-expanding end, and the outward-expanding end enters into the notch on the die, thereby realizing restriction on the die.

[0038] The fixed pliers body 10 is also provided with a reinforcement nail 24, which is set on the side of the elastic limiting nail 23 on the fixed pliers body 10, and cooperates with the elastic limiting nail 23 to reinforce the mouth die installed on the fixed pliers body 10. The reinforcement nail 24 is preferably threaded and arranged on the fixed pliers body 10. The reinforcement nail 10 is pressed on the surface of the mouth die, and the reinforcement nail 24 cooperates with the elastic limiting nail 23 to limit the mouth die located on the fixed pliers body 10.

[0039] Reinforcement nails are selectively provided on the movable jaw body 11. Since the movable jaw body 11 will carry the die to move synchronously when it moves, the side of the die close to the mounting plate 20 is a flat surface. Therefore, when the movable jaw body 11 is opened, the side of the die on the movable jaw body 11 will abut against the side of the mounting plate. The side of the mounting plate 20 is also a flat surface. After the die abuts against the mounting plate 20, it will be subjected to force, and cooperate with the elastic limiting nails 23 on the movable jaw body 11 to play a good limiting role on the die installed on the movable jaw body 11.

[0040] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A limited opening pliers, characterized in that, The invention comprises a fixed pliers body, a movable pliers body, a fixed pliers handle and a movable pliers handle, wherein the fixed pliers body comprises a fixed jaw and mounting plates symmetrically arranged on both sides of the fixed jaw, the movable pliers body is mounted in the mounting plate, a pulling connection piece is provided between the end of the movable pliers handle and the movable pliers body, and a limiting connection piece is provided between the movable pliers handle and the mounting plate at the mounting position of the pulling connection piece on the movable pliers handle. An abutment plate is rotatably provided on the movable clamp handle.

2. The limited opening pliers according to claim 1, characterized in that: The abutment plate abuts against the mounting plate while maintaining the fixed caliper body and the movable caliper body in an open state.

3. The limited opening pliers according to claim 1, characterized in that: A side connecting piece is provided between the fixed clamp handle and the movable clamp handle.

4. The limited opening pliers according to claim 3, characterized in that: The pulling connection piece on the fixed clamp handle is provided with a torsion spring, and the torsion spring is provided with two supporting interfaces. One side of the supporting interface is fixedly connected to the movable clamp body, and the other side is arranged in the fixed clamp handle.

5. The limited opening pliers according to claim 1, characterized in that: The fixed clamp body is provided with a reinforcing nail.

6. The limited opening pliers according to claim 1, characterized in that: The fixed caliper body and the movable caliper body are both provided with elastic limiting nails, which pass through the fixed caliper body and the movable caliper body, and one side of the fixed caliper body and the movable caliper body is provided with a spring that cooperates with the end of the elastic limiting nail.

7. The limited opening pliers according to claim 1, characterized in that: Mouth dies are installed in the fixed jaw body and the movable jaw body.

8. The limited opening pliers according to claim 1, characterized in that: The die on the movable pliers body abuts against the side surface of the mounting plate of the fixed pliers body.

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