CN210968516U

CN210968516U - Self-locking pliers for nuclear power station maintenance

Info

Publication number: CN210968516U
Application number: CN201921296124.3U
Authority: CN
Inventors: 庞守军
Original assignee: China Nuclear Industry Maintenance Co Ltd
Current assignee: China Nuclear Industry Maintenance Co Ltd
Priority date: 2019-08-09
Filing date: 2019-08-09
Publication date: 2020-07-10
Anticipated expiration: 2029-08-09

Abstract

The utility model provides a self-locking pliers for nuclear power station maintenance, which comprises a pliers body, wherein the pliers body comprises a pivot, two pliers handles and two pliers heads respectively connected with the two pliers handles, and the two pliers handles are hinged through the pivot so that the two pliers heads are matched with a clamping workpiece; the self-locking pliers further comprise a locking assembly for locking the two pliers handles, the locking assembly comprises a pin shaft, a screw rod hinged with one pliers handle through the pin shaft and a locking nut for locking the other pliers handle on the screw rod, and a through hole for the screw rod to penetrate through is formed in the other pliers handle. When a workpiece needs to be clamped for a long time, one end of the screw rod is rotatably arranged on one of the clamp handles through the pin shaft, the other end of the screw rod penetrates through the through hole, the two clamp handles are mutually closed to clamp the workpiece, and the locking nut is screwed at the other end of the screw rod to lock the two clamp handles, so that the hand clamp can clamp the workpiece for a long time with stable and unchangeable torque, the workpiece is prevented from being loosened and displaced or falling off, and the operation efficiency is effectively improved.

Description

Self-locking pliers for nuclear power station maintenance

Technical Field

The utility model belongs to the technical field of the nuclear power station overhauls, more specifically say, relate to a auto-lock pincers for nuclear power station overhauls.

Background

In the process of nuclear power station maintenance, a hand vice is usually needed to clamp a workpiece for processing or repairing. When the current hand pliers are used for clamping workpieces to carry out repair processing such as polishing, sawing and the like, the pliers handles need to be tightly held by manual hand force, and then the pliers jaws can clamp the workpieces. However, the repair process such as polishing and sawing often requires a long time, and since an operator needs to grip the forceps handle with a hand in a fixed state for a long time during the repair operation, muscle fatigue is easily generated to loosen the forceps handle, so that the forceps are difficult to maintain a stable clamping force to clamp the workpiece for a long time, the workpiece often moves in the jaws, and even falls off from the jaws in severe cases, thereby prolonging the repair operation time and reducing the operation efficiency.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a self-locking pliers for nuclear power station overhauls, the pliers that aim at solving the existence among the prior art relies on artifical hand power to tightly hold the pincers handle, is difficult to keep firm clamping-force to carry out long-term centre gripping to the work piece, leads to the work piece to produce not hard up displacement or the problem that drops keeping silent.

In order to achieve the purpose, the technical scheme adopted by the utility model is to provide a self-locking pliers for nuclear power station maintenance, which comprises a pliers body; the pliers body comprises a pivot, two pliers handles and two pliers heads respectively connected with the two pliers handles, and the two pliers handles are hinged through the pivot so that the two pliers heads are matched with and used for clamping a workpiece; the self-locking pliers further comprise locking assemblies for locking the two pliers handles, each locking assembly comprises a pin shaft axially arranged in parallel to the pivot shaft, a screw rod hinged to one of the pliers handles through the pin shaft, and a locking nut for locking the other pliers handle to the screw rod, and a through hole for the screw rod to penetrate through is formed in the other pliers handle.

Furthermore, the locking assembly further comprises a ring sleeve connected with the screw rod, and the ring sleeve is sleeved on the pin shaft.

Furthermore, a limiting groove is concavely arranged on the inner side of the clamp handle corresponding to the pin shaft, and the ring sleeve is sleeved in the limiting groove.

Further, the angle range of the ring sleeve rotating in the limiting groove is 0-60 degrees.

Further, the limiting groove is arranged to be an arc-shaped groove.

Furthermore, a pin hole is formed in the position, corresponding to the pin shaft, of the clamp handle in the limiting groove, and the pin shaft is inserted into the pin hole.

Furthermore, one end of the pin shaft is radially and convexly provided with a retaining ring, and the retaining ring is abutted against the clamp handle corresponding to the pin shaft.

Further, the outer diameter of the ring sleeve is larger than the diameter of the screw rod.

Further, the locking nut is a butterfly nut.

Furthermore, the inner sides of the two forceps heads are provided with forceps teeth which are mutually meshed and matched.

The utility model provides a from locking pliers for nuclear power station overhauls beneficial effect lies in: compared with the prior art, the utility model provides a self-locking pliers for nuclear power station overhauls, through the round pin axle that is equipped with articulated screw rod on a pincers handle, and set up the through-hole that supplies the screw rod to pass on another pincers handle, then when the long-time centre gripping work piece of needs, rotate the one end of screw rod through the round pin axle and install on a pincers handle, pass the through-hole with the other end of screw rod, make two pincers handles draw close each other in order to press from both sides tight work piece, screw lock nut in order to lock two pincers handles again at the other end of screw rod, thereby make the pliers can carry out long-term centre gripping to the work piece with stable unchangeable moment, avoid the work piece to produce not hard up. When the workpiece does not need to be clamped for a long time, the locking nut on the screw rod is unscrewed, the screw rod is detached from the two forceps handles, the conventional use function of the pliers can be recovered, and the pliers are simple to operate, convenient and practical. In addition, the screw is rotatably arranged on one clamp handle through the pin shaft, so that when a workpiece is clamped, the screw is rotated to adjust the opening degree between the two clamp handles, the hand clamp can be suitable for workpieces with different thicknesses or diameters, and the applicability is wide.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive labor.

Fig. 1 is a schematic structural view of a self-locking pliers for nuclear power station maintenance provided in an embodiment of the present invention;

fig. 2 is an exploded schematic view of a self-locking pliers for nuclear power station maintenance provided in an embodiment of the present invention;

fig. 3 is a schematic view of a partial cross-sectional structure of a self-locking pliers for nuclear power station maintenance provided in an embodiment of the present invention;

FIG. 4 is an enlarged, fragmentary, schematic view of FIG. 3;

fig. 5 is a schematic side view of a self-locking pliers for nuclear power station maintenance provided by the embodiment of the present invention, wherein a handle of the self-locking pliers is provided with a limit groove;

fig. 6 is a schematic side view of the self-locking pliers for nuclear power station maintenance provided by the embodiment of the present invention, wherein a through hole is formed on the other handle;

fig. 7 is a side view structure diagram of a round pin axle of auto-lock hand for nuclear power station overhaul that the embodiment of the utility model provides.

Wherein, in the drawings, the reference numerals are mainly as follows:

1-a clamp body; 11-a pivot; 12-a forceps handle; 13-binding clip; 131-clamp teeth; 2-a workpiece;

3-a locking assembly; 31-a pin shaft; 311-baffle ring; 32-screw rod; 33-a lock nut; 34-ring sleeve;

4-a through hole; 5-limiting groove; 6-pin hole.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

It will be understood that when an element is referred to as being "connected" or "disposed" to another element, it can be directly on the other element or be indirectly connected to the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or be indirectly connected to the other element.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise. The meaning of "a number" is one or more unless specifically limited otherwise.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Referring to fig. 1 to 3, the self-locking pliers for nuclear power station maintenance provided by the present invention will now be described. The utility model provides a from locking pliers for nuclear power station overhauls, including the pincers body 1, the pincers body 1 includes pivot 11, two pincers handles 12, two binding clip 13 that link to each other with two pincers handles 12 respectively, and two pincers handles 12 are articulated through pivot 11 to when pinching close and drawing close two pincers handles 12, make two binding clip 13 each other bite and tightly cooperate and carry out the centre gripping for work piece 2. The self-locking pliers further comprise a locking assembly 3 for locking the two pliers handles 12, the locking assembly 3 comprises a pin shaft 31 axially arranged in parallel to the pivot 11, a screw rod 32 hinged to one pliers handle 12 through the pin shaft 31, and a locking nut 33 for locking the other pliers handle 12 to the screw rod 32, and a through hole 4 for the screw rod 32 to pass through is formed in the other pliers handle 12.

Compared with the prior art, the self-locking pliers for nuclear power station maintenance provided by the utility model has the advantages that the pin shaft 31 of the hinged screw 32 is arranged on one pliers handle 12, the through hole 4 for the screw 32 to pass through is arranged on the other pliers handle 12, when the workpiece 2 needs to be clamped for a long time, one end of the screw rod 32 is rotatably arranged on one of the clamp handles 12 through the pin shaft 31, the other end of the screw rod 32 passes through the through hole 4, the two clamp handles 12 are mutually closed to clamp the workpiece 2, the other end of the screw rod 32 is screwed with the locking nut 33, the other clamp handle 12 can be locked on the screw rod 32, therefore, the pliers can clamp the workpiece 2 for a long time with stable and unchangeable torque, the fatigue caused by tightly holding the pliers handle 12 by manual hand force to clamp the workpiece 2 is eliminated, the clamped workpiece 2 can be prevented from loosening and displacing or falling off, and the working efficiency is effectively improved. When the workpiece 2 does not need to be clamped for a long time, the locking nut 33 on the screw rod 32 is unscrewed, and the screw rod 32 is detached from the two forceps handles 12, so that the conventional use function of the pliers can be recovered, and the pliers are simple to operate, convenient and practical. In addition, since the screw 32 is rotatably mounted on one of the handles 12 through the pin 31, the screw 32 can be rotated to adjust the opening between the two handles 12 when the workpiece 2 is clamped, so that the pliers can be applied to workpieces 2 of various thicknesses or diameters, and the versatility is good.

Specifically, please refer to fig. 3 and fig. 6 together, as a specific embodiment of the self-locking pliers for nuclear power station overhaul provided by the present invention, the shape and size of the through hole 4 is a circular hole matched with the screw rod 32, the aperture of the through hole 4 is greater than or equal to the diameter of the screw rod 32, and preferably, the aperture of the through hole 4 is slightly greater than the diameter of the screw rod 32 for enhancing stability.

Further, referring to fig. 3 and 4 together, as a specific embodiment of the self-locking pliers for nuclear power plant overhaul provided by the present invention, the locking assembly 3 further includes a ring sleeve 34 connected to the screw rod 32, and the ring sleeve 34 is sleeved on the pin 31.

In this embodiment, preferably, the ring sleeve 34 is rotatably sleeved on the pin 31 to enable the screw 32 to rotate around the pin 31, that is, by arranging the ring sleeve 34 at one end of the screw 32, the ring sleeve 34 is rotatably sleeved on the pin 31, which not only can enhance the connection strength between the screw 32 and the pin 31, but also can ensure the smoothness of the rotation of the screw 32, so as to facilitate the rotation of the adjusting screw 32 to enable the other end of the screw 32 to rapidly penetrate through the through hole 4 on the other forceps handle 12, thereby improving the efficiency of the forceps for clamping the workpiece 2.

Further, please refer to fig. 3 and fig. 4 together, as a specific embodiment of the self-locking pliers for nuclear power station overhaul provided by the present invention, the inner side of the pliers handle 12 corresponding to the pin 31 is concavely provided with a limit groove 5, and the ring sleeve 34 is disposed in the limit groove 5.

In this embodiment, the inner side of the forceps handle 12 corresponding to the pin 31 is concavely provided with a limiting groove 5 for limiting the rotation angle of the screw 32 around the pin 31, wherein the ring sleeve 34 is rotatably disposed in the limiting groove 5 to limit the rotation angle of the screw 32 around the pin 31, so that the screw 32 can only rotate within a small angle range, and the stability of the screw 32 and the lock nut 33 for locking the two forceps handles 12 is enhanced. The ring sleeve 34 is arranged in the limiting groove 5, so that the volume of the self-locking pliers is reduced.

Specifically, under the limiting action of the limiting groove 5, the rotation angle range of the ring sleeve 34 in the limiting groove 5 is 0 to 60 degrees, that is, the screw 32 can rotate within the angle range of 0 to 60 degrees, so that when the workpiece 2 is clamped, the screw 32 is rotated to adjust the opening degree between the two forceps handles 12, so that the pliers can be suitable for workpieces 2 with different thicknesses or diameters, and the universality is good.

Further, please refer to fig. 3 and fig. 4 together, as a specific implementation manner of the self-locking pliers for nuclear power station overhaul provided by the present invention, the limiting groove 5 is set to be an arc-shaped groove to avoid interference obstruction caused by the free rotation of the ring sleeve 34 by the limiting groove 5, and the stability and reliability of the rotation adjustment of the screw 32 are improved.

Further, please refer to fig. 2 together, as a specific embodiment of the self-locking pliers for nuclear power station overhaul provided by the present invention, a pin hole 6 is provided on the position of the limiting groove 5 on the pliers handle 12 corresponding to the pin shaft 31, and the pin shaft 31 is inserted into the pin hole 6.

In this embodiment, the pin hole 6 is provided at the position of the limiting groove 5 on the forceps handle 12 corresponding to the pin shaft 31, and the pin shaft 31 is detachably mounted in the pin hole 6, so that when the workpiece 2 does not need to be clamped for a long time, the pin shaft 31 and the screw rod 32 are quickly detached from the forceps handle 12, the conventional use function of the forceps is recovered, and the forceps are simple to operate, convenient and practical.

Further, please refer to fig. 7 together, as the utility model provides a specific implementation of a self-locking pliers for nuclear power station overhaul, the one end of round pin axle 31 radially is protruding to be equipped with and keeps off ring 311, keeps off ring 311 and supports on a pincers handle 12 (on the pincers handle 12 that round pin axle 31 corresponds), fixes a position round pin axle 31 through keeping off ring 311, strengthens the stability that round pin axle 31 installed in pinhole 6.

Further, please refer to fig. 4 together, as a specific embodiment of the self-locking pliers for nuclear power plant overhaul provided by the present invention, the outer diameter of the ring sleeve 34 is larger than the diameter of the screw rod 32, preferably, the outer diameter of the ring sleeve 34 is twice the diameter of the screw rod 32, so as to facilitate the connection between the screw rod 32 and the pin 31 and enhance the connection strength between the screw rod 32 and the pin 31.

Further, as the utility model provides a concrete implementation mode of a auto-lock pincers for nuclear power station overhauls, lock nut 33 is the butterfly nut to under the condition that does not need use tools, can conveniently screw fast or unscrew the operation with the butterfly nut at screw rod 32, the convenience that the reinforcing pincers used.

Further, please refer to fig. 1 together, as the utility model provides a specific implementation of a self-locking pliers for nuclear power station overhaul, two binding clip 13 structures are the same, and the inboard of two binding clip 13 all is equipped with mutual interlock complex tong teeth to prevent the work piece 2 slippage of centre gripping between two binding clip 13, strengthen the steadiness of pliers centre gripping work piece 2.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The utility model provides a auto-lock pincers for nuclear power station overhauls, includes the pincers body, its characterized in that: the pliers body comprises a pivot, two pliers handles and two pliers heads respectively connected with the two pliers handles, and the two pliers handles are hinged through the pivot so that the two pliers heads are matched with and used for clamping a workpiece; the self-locking pliers further comprise locking assemblies for locking the two pliers handles, each locking assembly comprises a pin shaft axially arranged in parallel to the pivot shaft, a screw rod hinged to one of the pliers handles through the pin shaft, and a locking nut for locking the other pliers handle to the screw rod, and a through hole for the screw rod to penetrate through is formed in the other pliers handle.

2. The self-locking pliers for nuclear power plant overhaul of claim 1 wherein: the locking assembly further comprises a ring sleeve connected with the screw rod, and the ring sleeve is sleeved on the pin shaft.

3. The self-locking pliers for nuclear power plant overhaul of claim 2 wherein: the inner side of the clamp handle corresponding to the pin shaft is concavely provided with a limiting groove, and the ring sleeve is sleeved in the limiting groove.

4. Self-locking pliers for nuclear power plant overhaul as claimed in claim 3, characterized in that: the angle range of the ring sleeve rotating in the limiting groove is 0-60 degrees.

5. Self-locking pliers for nuclear power plant overhaul as claimed in claim 3, characterized in that: the limiting groove is arranged into an arc-shaped groove.

6. Self-locking pliers for nuclear power plant overhaul as claimed in claim 3, characterized in that: the positions of the clamp handles corresponding to the pin shafts and the limiting grooves are provided with pin holes, and the pin shafts are inserted into the pin holes.

7. The self-locking pliers for nuclear power plant overhaul of claim 6 wherein: and one end of the pin shaft is radially and convexly provided with a retaining ring, and the retaining ring is abutted against the clamp handle corresponding to the pin shaft.

8. The self-locking pliers for nuclear power plant overhaul of claim 2 wherein: the outer diameter of the ring sleeve is larger than the diameter of the screw rod.

9. The self-locking pliers for nuclear power plant overhaul of claim 1 wherein: the locking nut is a butterfly nut.

10. Self-locking pliers for nuclear power plant maintenance as claimed in any one of claims 1 to 9, characterized in that: the inner sides of the two forceps heads are provided with forceps teeth which are mutually meshed and matched.