CN113618650A

CN113618650A - Improved locking pliers

Info

Publication number: CN113618650A
Application number: CN202110863546.XA
Authority: CN
Inventors: 张瑜; 李烨
Original assignee: Shanghai Nuclear Engineering Research and Design Institute Co Ltd
Current assignee: Shanghai Nuclear Engineering Research and Design Institute Co Ltd
Priority date: 2021-07-29
Filing date: 2021-07-29
Publication date: 2021-11-09

Abstract

The invention belongs to the field of nuclear power measurement systems, and particularly discloses improved locking pliers, which comprise hexagonal jaws, fixed handles, movable handles, tension springs, an anti-opening device, jaw adjusting jackscrews and pins, wherein the hexagonal jaws are fixed on the fixed handles; a movable handle is arranged on one side of the fixed handle, a hexagonal jaw is arranged at one end of the fixed handle and one end of the movable handle, the shape of the hexagonal jaw is matched with that of a hexagonal nut, the hexagonal jaw comprises an upper jaw mouth and a lower jaw mouth, and the bottom side of the right end of the upper jaw mouth, the right end of the lower jaw mouth and the end part of the fixed handle are connected through a first pin shaft; the hexagonal jaw is completely the same as the clamped hexagonal nut in shape, so that the hexagonal jaw is completely matched with the clamped hexagonal nut after being closed, and the opening prevention device is arranged to ensure that the hexagonal jaw cannot be opened, so that a larger torque value is ensured, and the clamped workpiece is not deformed to ensure that the workpiece can be detached during subsequent maintenance.

Description

Improved locking pliers

Technical Field

The invention relates to the field of nuclear power measurement systems, in particular to an improved locking pliers.

Background

The nuclear measuring instrument outside the reactor in the nuclear power station detects very weak signals with only a muA level, and the functions of the nuclear measuring instrument are to control the reaction speed and trigger shutdown, so that the safety of the reactor is ensured, which is very important. With the stricter requirements on the safety of nuclear power plants, the technical requirements on cables for transmitting signals are higher, and in order to shield the interference of background noise generated by the operation of the nuclear power plants on the cable transmission signals, a layer of copper armor is additionally arranged outside a triaxial cable in the latest nuclear power plants in the world at present. The torque value of the sealing nut at the copper armor sealing joint is required to be 85ft-lbf [115m-N ], the torque value is quite large, when the torque is applied, the fixed end of the sealing nut is difficult to clamp by using a wrench and the existing locking pliers, even the hexagonal head of the nut is ground to be round, the torque value cannot meet the requirement, and the nut cannot be loosened during maintenance.

Disclosure of Invention

The present invention is directed to an improved locking pliers to solve the above problems.

In order to achieve the purpose, the invention provides the following technical scheme: an improved locking pliers comprises a hexagonal jaw, a fixed handle, a movable handle, a tension spring, an anti-opening device, a jaw adjusting jackscrew and a pin; the improved hexagonal wrench is characterized in that a movable handle is arranged on one side of the fixed handle, a hexagonal jaw is arranged at one end of the fixed handle and one end of the movable handle, the hexagonal jaw is matched with a hexagonal nut in shape, the hexagonal jaw comprises an upper wrench mouth and a lower wrench mouth, the bottom side of the right end of the upper wrench mouth, the right end of the lower wrench mouth and the end of the fixed handle are connected through a first pin shaft, and the top side of the right end of the upper wrench mouth is connected with the end of the movable handle through a second pin shaft.

Preferably, the fixed handle is of a hollow structure, the middle of the inner wall of the fixed handle is fixedly connected with one end of a tension spring, and the other end of the tension spring is fixedly connected with the surface of the right end of the upper clamp mouth.

Preferably, the fixed handle is kept away from hexagon one end of keeping silent and is seted up threaded hole, and threaded hole female connection has the adjustment jackscrew of keeping silent, the adjustment jackscrew of keeping silent is located fixed handle inside one end and regulating spring one end fixed connection.

Preferably, the other end of the adjusting spring is fixedly connected with the connecting rod, the other end of the connecting rod is hinged with the pressing rod, and the other end of the pressing rod is located inside the movable handle and is connected with the movable handle through a third pin shaft.

Preferably, an opening preventing device is arranged on the outer side of the hexagonal jaw and comprises a body, a groove and a pin hole; the body is U-shaped structure.

Preferably, body inner wall one side is provided with the recess, the recess size keeps silent the size with the hexagon and corresponds, and the body surface is located the recess both sides and has seted up the cotter hole, and the hexagon is kept silent both sides and is corresponded and be provided with the pin, and the body keeps silent fixed connection with the hexagon through the cooperation of cotter hole and pin.

Compared with the prior art, the invention has the beneficial effects that: the hexagonal jaw is completely the same as the clamped hexagonal nut in shape, so that the hexagonal jaw is completely matched with the clamped hexagonal nut after being closed, and the opening prevention device is arranged to ensure that the hexagonal jaw cannot be opened, so that a larger torque value is ensured, and the clamped workpiece is not deformed to ensure that the workpiece can be detached during subsequent maintenance.

Drawings

FIG. 1 is a schematic view of the overall structure of the present invention;

fig. 2 is a schematic structural view of the opening prevention device of the present invention.

In the figure: 1. a hexagonal jaw; 101. an upper plier mouth; 102. a lower plier mouth; 2. fixing a handle; 3. a movable handle; 4. a first pin shaft; 5. a second pin shaft; 6. a tension spring; 7. adjusting jackscrews at the jaw; 8. adjusting the spring; 9. a connecting rod; 10. a pressure lever; 11. a third pin shaft; 12. an anti-opening device; 121. a body; 122. a groove; 123. a pin hole; 13. a pin.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

As shown in FIGS. 1-2; the invention provides improved locking pliers, which comprise hexagonal jaws 1, fixed handles 2, movable handles 3, tension springs 6, an anti-opening device 12, jaw adjusting jackscrews 7 and pins 13, wherein the hexagonal jaws are fixed on the fixed handles; the improved pliers are characterized in that a movable handle 3 is arranged on one side of the fixed handle 2, a hexagonal jaw 1 is arranged at one end of the fixed handle 2 and one end of the movable handle 3, the shape of the hexagonal jaw 1 is matched with that of a hexagonal nut, the hexagonal jaw 1 comprises an upper pliers mouth 101 and a lower pliers mouth 102, the bottom side of the right end of the upper pliers mouth 101, the right end of the lower pliers mouth 102 and the end of the fixed handle 2 are connected through a first pin shaft 4, and the top side of the right end of the upper pliers mouth 101 is connected with the end of the movable handle 3 through a second pin shaft 5.

Furthermore, the inside of the fixed handle 2 is of a hollow structure, the middle part of the inner wall of the fixed handle 2 is fixedly connected with one end of the tension spring 6, and the other end of the tension spring 6 is fixedly connected with the surface of the right end of the upper clamp mouth 101.

Further, the fixed handle 2 is kept away from the hexagon and is kept silent 1 one end and seted up threaded hole, and threaded hole female connection has the adjustment jackscrew 7 of keeping silent, the adjustment jackscrew 7 of keeping silent is located the inside one end of fixed handle 2 and adjusting spring 8 one end fixed connection.

Further, the other end of the adjusting spring 8 is fixedly connected with a connecting rod 9, the other end of the connecting rod 9 is hinged to a pressing rod 10, and the other end of the pressing rod 10 is located inside the movable handle 3 and is connected with the movable handle 3 through a third pin shaft 11.

Further, an opening prevention device 12 is arranged outside the hexagonal jaw 1, and the opening prevention device 12 comprises a body 121, a groove 122 and a pin hole 123; the body 121 has a U-shaped structure.

Further, body 121 inner wall one side is provided with recess 122, recess 122 size and hexagon are kept silent 1 size and are corresponded, and body 121 surface lies in recess 122 both sides and has seted up cotter hole 123, and hexagon is kept silent 1 both sides and is corresponded and be provided with pin 13, and body 121 is kept silent 1 fixed connection with the hexagon through the cooperation of cotter hole 123 and pin 13.

The invention provides improved locking pliers, which comprise hexagonal jaws 1, fixed handles 2, movable handles 3, tension springs 6, an anti-opening device 12, jaw adjusting jackscrews 7 and pins 13, wherein the hexagonal jaws are fixed on the fixed handles; when the hexagonal nut clamping device is used, a user controls the hexagonal jaw 1 to clamp and fix a hexagonal nut through opening and closing the movable handle 3 and the fixed handle 2, the hexagonal jaw 1 clamps and stabilizes the hexagonal nut through closing the upper jaw 101 and the lower jaw 102, then, the user can rotate the jaw adjusting jackscrew 7 through the threaded connection between the jaw adjusting jackscrew 7 and the threaded hole, when the jaw adjusting jackscrew extends inwards, the adjusting spring 8 is compressed, the connecting rod 9 drives the pressing rod 10 to move, the opening degree between the movable handle 3 and the fixed handle 2 can be finely adjusted through the movement of the pressing rod 10, so that the hexagonal nut is clamped more firmly by the hexagonal jaw 1, and the hexagonal jaw 1 is matched with the hexagonal nut in shape, so that the hexagonal jaw 1 is completely matched with the clamped hexagonal nut after being completely closed, and the clamped hexagonal nut always keeps the original hexagonal shape, can dismantle when guaranteeing follow-up maintenance, later, will prevent opening device 12 and clinch the hexagon and keep silent 1 through the cooperation of pin 13 with pin hole 123 to prevent opening and shutting of hexagon and keep silent 1.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. An improved locking pliers is characterized in that: comprises a hexagonal jaw (1), a fixed handle (2), a movable handle (3), a tension spring (6), an anti-opening device (12), a jaw adjusting jackscrew (7) and a pin (13); the improved pliers are characterized in that a movable handle (3) is arranged on one side of the fixed handle (2), a hexagonal jaw (1) is arranged at one end of the fixed handle (2) and one end of the movable handle (3), the shape of the hexagonal jaw (1) is matched with that of a hexagon nut, the hexagonal jaw (1) comprises an upper pliers mouth (101) and a lower pliers mouth (102), the bottom side of the right end of the upper pliers mouth (101), the right end of the lower pliers mouth (102) and the end of the fixed handle (2) are connected through a first pin shaft (4), and the top side of the right end of the upper pliers mouth (101) is connected with the end of the movable handle (3) through a second pin shaft (5).

2. An improved locking pliers as claimed in claim 1 wherein: the interior of the fixed handle (2) is of a hollow structure, the middle of the inner wall of the fixed handle (2) is fixedly connected with one end of a tension spring (6), and the other end of the tension spring (6) is fixedly connected with the surface of the right end of the upper clamp nozzle (101).

3. An improved locking pliers as claimed in claim 1 wherein: the hexagon of keeping away from in fixed handle (2) keeps away from and keeps silent (1) one end threaded hole, and threaded hole female connection has and keeps silent adjustment jackscrew (7), keep silent adjustment jackscrew (7) and be located fixed handle (2) inside one end and regulating spring (8) one end fixed connection.

4. An improved locking pliers as claimed in claim 3 wherein: the other end of the adjusting spring (8) is fixedly connected with the connecting rod (9), the other end of the connecting rod (9) is hinged to the pressing rod (10), and the other end of the pressing rod (10) is located inside the movable handle (3) and is connected with the movable handle (3) through a third pin shaft (11).

5. An improved locking pliers as claimed in claim 1 wherein: an opening preventing device (12) is arranged on the outer side of the hexagonal jaw (1), and the opening preventing device (12) comprises a body (121), a groove (122) and a pin hole (123); the body (121) is of a U-shaped structure.

6. An improved locking pliers as claimed in claim 5 wherein: body (121) inner wall one side is provided with recess (122), recess (122) size and hexagon are kept silent (1) size and are corresponded, and body (121) surface is located recess (122) both sides and has seted up cotter hole (123), and hexagon is kept silent (1) both sides and is corresponded and be provided with pin (13), and body (121) are kept silent (1) fixed connection with the hexagon through the cooperation of cotter hole (123) and pin (13).