CN113183095A - Safety mounting pliers for cotter pin - Google Patents
Safety mounting pliers for cotter pin Download PDFInfo
- Publication number
- CN113183095A CN113183095A CN202110350289.XA CN202110350289A CN113183095A CN 113183095 A CN113183095 A CN 113183095A CN 202110350289 A CN202110350289 A CN 202110350289A CN 113183095 A CN113183095 A CN 113183095A
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- China
- Prior art keywords
- shearing
- clamping
- mounting
- clamping part
- pliers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/20—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same inserting or withdrawing split pins or circlips
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25B—TOOLS OR BENCH DEVICES NOT OTHERWISE PROVIDED FOR, FOR FASTENING, CONNECTING, DISENGAGING OR HOLDING
- B25B27/00—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for
- B25B27/14—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same
- B25B27/20—Hand tools, specially adapted for fitting together or separating parts or objects whether or not involving some deformation, not otherwise provided for for assembling objects other than by press fit or detaching same inserting or withdrawing split pins or circlips
- B25B27/205—Pliers or tweezer type tools with tow actuated jaws
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Snaps, Bayonet Connections, Set Pins, And Snap Rings (AREA)
- Shearing Machines (AREA)
Abstract
The invention discloses cotter pin safety mounting pliers which comprise a mounting box, wherein the upper side and the lower side of the interior of the mounting box are respectively provided with a shearing part and a clamping part in a sliding manner along the same direction, the shearing end of the shearing part and the clamping end of the clamping part both extend to the exterior of the mounting box, and a clamping area is formed between the shearing end of the shearing part and the clamping end of the clamping part; a shearing blade is arranged on one side, close to the clamping part, of the shearing end of the shearing part, a shearing driving assembly for driving the shearing part to linearly move towards the clamping part is arranged at one end of the shearing part, and a clamping driving assembly for driving the clamping part to linearly move towards the shearing part is arranged at one end of the clamping part; the split pin mounting device has the advantages of convenience in use, high split pin mounting efficiency and good split pin mounting quality.
Description
Technical Field
The invention belongs to the technical field of cotter pin installation devices, and particularly relates to cotter pin safety installation pliers.
Background
In the aircraft assembly process, there are many places to use cotter pin insurance. The manner of installing the cotter pin is: after the hexagonal slotted nut is screwed, the cotter pin is inserted into the nut groove and the hole at the tail part of the bolt, then the cotter pin is bent to the position near the groove of the nut to be hexagonal slotted, the length of the redundant cotter pin is removed, and the cotter pin is bent to the position near the groove of the hexagonal nut. In the existing cotter pin process, the mode of removing the unnecessary part of the cotter pin is to use a chisel or use a wire cutter to clamp, then the insurance is folded into the mounting groove of the bolt, and the insurance on the two sides is mounted in the corresponding groove to finish the mounting. The existing installation mode has low efficiency, unstable quality and high requirement on skill level.
Disclosure of Invention
The invention aims to provide safety mounting pliers for a cotter pin, which can effectively improve the mounting efficiency and the mounting quality of the cotter pin and have the advantages of simple operation, compact and simple structure and strong universality.
The invention is realized by the following technical scheme:
a safety mounting clamp for a cotter pin comprises a mounting box, wherein a shearing part and a clamping part are respectively arranged on the upper side and the lower side of the interior of the mounting box in a sliding mode along the same direction, the shearing end of the shearing part and the clamping end of the clamping part extend to the exterior of the mounting box, and a clamping area is formed between the shearing end of the shearing part and the clamping end of the clamping part; one side that is close to the clamping part on the shearing end of shearing part is provided with the shearing blade, the one end of shearing part is provided with the shearing drive assembly that drives the shearing part towards clamping part linear movement, and the one end of clamping part is provided with the centre gripping drive assembly that drives the clamping part towards the shearing part linear movement.
In order to better realize the invention, further, an installation groove for installing the shearing driving assembly is further arranged at one end of the shearing part close to the shearing driving assembly, and a connecting groove connected with the clamping driving assembly is arranged at one end of the clamping part close to the clamping driving assembly.
In order to better realize the invention, an elastic reset piece is further arranged between one end of the shearing part far away from the clamping part and the inner wall of the mounting box.
In order to better realize the invention, the shearing driving assembly comprises a rotating handle, a pushing block and a rotating pin shaft, the rotating pin shaft is rotatably installed in an installation groove at one end of the shearing part, the pushing block is sleeved on the rotating pin shaft, a pushing arc surface for pushing the side wall of the installation groove is arranged at the edge of the pushing block, and an active handle extending to the outside of the installation groove is arranged at the top of the pushing block.
In order to better realize the invention, further, the shearing part is an L-shaped sliding clamp, the shearing end of the L-shaped sliding clamp extends to the outside of the mounting box, and the pressed end of the L-shaped sliding clamp is provided with a mounting groove; the shearing end of the L-shaped sliding pliers is provided with a vertical installation seam, and a shearing blade is installed in the installation seam.
In order to better realize the invention, a waist-shaped lightening hole is further arranged on the L-shaped sliding clamp.
In order to better realize the invention, the clamping driving assembly further comprises an adjusting screw rod which is installed at one end of the installation box in a threaded mode and extends into the installation box, and one end, close to the clamping portion, of the adjusting screw rod is in rotary clamping connection with the connecting groove at one end of the clamping portion.
In order to better realize the invention, the clamping part comprises a clamping block and a movable block, the movable block is arranged at the lower side in the mounting box in a sliding manner, one end of the movable block, which is close to the shearing part, is provided with the clamping block, and the clamping end of the clamping block extends to the outer side of the mounting box; one end of the movable block, which is far away from the shearing part, is provided with a connecting groove.
In order to better implement the invention, further, the connecting groove is a T-shaped groove.
In order to better realize the invention, the mounting box is further provided with a limiting piece for limiting and locking the shearing driving assembly.
Compared with the prior art, the invention has the following advantages and beneficial effects:
(1) according to the invention, the shearing part and the clamping part are arranged in the mounting box in a sliding manner along the same direction, the shearing driving assembly drives the shearing part to slide towards the direction close to or far away from the clamping part, and the clamping driving assembly drives the clamping part to slide towards the direction close to or far away from the shearing part, so that the distance between the shearing part and the clamping part is adjusted, and the mounting box can adapt to compatible clamping and mounting of cotter pins with different specifications on hexagonal slotted nuts with different specifications, and has wide applicability and strong practicability;
(2) according to the hexagonal slotted nut cutting device, the shearing blade is arranged at the shearing end of the shearing part, the clamping driving assembly drives the clamping part to slide towards the shearing tool, and the hexagonal slotted nut is clamped through the clamping end of the clamping part and the cutting edge of the shearing blade, so that the hexagonal slotted nut is clamped and positioned, the hexagonal slotted nut is prevented from moving in the subsequent process of cutting off and pushing the cotter pin, and the mounting quality of the final cotter pin is further ensured;
(3) according to the invention, the clamping driving assembly is only required to be adjusted in advance, the clamping part is driven to be close to the shearing part to clamp and fix the hexagonal slotted nut, the positioning and fixing of the hexagonal slotted nut are realized, then the shearing driving assembly is adjusted to drive the shearing part to move towards the direction close to the clamping part, so that the shearing blade is driven to cut off the cotter pin, and meanwhile, the cotter pin at the cut-off part is pushed to the inside of the mounting groove of the hexagonal slotted nut through the shearing blade, so that the mounting of the cotter pin on the hexagonal slotted nut is efficiently completed, the working efficiency is greatly improved, and the mounting quality of the cotter pin is ensured.
Drawings
FIG. 1 is a schematic view of the internal structure of the present invention;
FIG. 2 is a schematic structural view of a shear drive assembly and a clamp drive assembly;
FIG. 3 is a schematic view of the present invention;
FIG. 4 is a schematic structural view of the clamping portion;
FIG. 5 is a schematic view of the adjusting screw;
FIG. 6 is a schematic view of a shear blade configuration;
FIG. 7 is a schematic structural view of a shear drive assembly;
FIG. 8 is a schematic view of the structure of the shearing part;
fig. 9 is a schematic structural view of the mounting box.
Wherein: 1-mounting a box; 2-a shearing section; 3-a clamping part; 4-a shearing blade; 5-a shear drive assembly; 6-a clamping drive assembly; 7-an elastic return member; 31-a clamping block; 32-a movable block; 51-a turning handle; 52-pushing the block; 53-rotating the pin; 61-adjusting screw.
Detailed Description
Example 1:
the cotter pin safety mounting pliers of the embodiment comprise a mounting box 1, as shown in fig. 1-9, wherein the upper side and the lower side of the inside of the mounting box 1 are respectively provided with a shearing part 2 and a clamping part 3 in a sliding manner along the same direction, the shearing end of the shearing part 2 and the clamping end of the clamping part 3 both extend to the outside of the mounting box 1, and a clamping area is formed between the shearing end of the shearing part 2 and the clamping end of the clamping part 3; one side that is close to clamping part 3 on the shearing end of shearing part 2 is provided with shearing blade 4, the one end of shearing part 2 is provided with the shearing drive assembly 5 that drives shearing part 2 towards 3 linear movement of clamping part, the one end of clamping part 3 is provided with the centre gripping drive assembly 6 that drives clamping part 3 towards 2 linear movement of shearing part.
The use principle is as follows:
insert the split pin in hexagon slotted nut's the mounting hole at first, the part that extends to the mounting hole outside with the split pin again is bent the mounting groove department that corresponds on hexagon slotted nut according to the installation requirement, then will treat the hexagon slotted nut who installs the split pin and place in the centre gripping district that the shearing end of shearing portion 2 and the tip of clamping part 3 constitute, and with the terminal surface laminating of a side end face of the hexagonal prism nut head of hexagon slotted nut and the tip of clamping part 3, the position of while manual regulation hexagon slotted nut, make mounting groove on the hexagon slotted nut align with shearing blade 4 on the shearing end of shearing portion 2. Then drive clamping part 3 through centre gripping drive assembly 6 and move towards the direction that is close to shearing part 2 for the tip of clamping part 3 and the blade of shearing blade 4 are with hexagonal slotted nut centre gripping location. Then can drive shearing part 2 through shearing drive assembly 5 and move towards the direction that is close to clamping part 3, and then drive and shear blade 4 and aim at the mounting groove jack-in on the hexagonal slotted nut, cut off the split pin through the shearing force that produces between shearing blade 4 and the mounting groove, accomplish the installation of split pin in pushing into the mounting groove with remaining split pin simultaneously, then according to the above-mentioned mode to the split pin of opposite side install can.
Further, for preventing to cause the removal of clamping part 3 and cracked safety pin bullet to fly when shearing the split pin, consequently set up the elastic sheet rubber that has at the exposed core of clamping part 3 to increase the frictional force between clamping part 3 and the hexagonal slotted nut, cushion through the sheet rubber simultaneously, avoid the instantaneous atress fracture of split pin, and then avoid the split pin fracture back bullet to fly.
Example 2:
the present embodiment is further optimized on the basis of embodiment 1, as shown in fig. 1 and 8, an installation groove for installing the shearing driving component 5 is further provided at one end of the shearing portion 2 close to the shearing driving component 5, and a connection groove connected with the clamping driving component 6 is provided at one end of the clamping portion 3 close to the clamping driving component 6.
An upper sliding groove and a lower sliding groove are arranged on the upper side and the lower side of the interior of the mounting box 1 in parallel along the same direction, a shearing part 2 is arranged in the upper sliding groove in a sliding mode, and a clamping part 3 is arranged in the lower sliding groove in a sliding mode. The top that the clamping part 3 was kept away from to shearing part 2 one end is provided with mounting groove, and mounting groove's thickness is half of shearing part 2 thickness, and the drive end of shearing drive assembly 5 extends to mounting groove's inside and contacts with mounting groove's lateral wall, pushes away mounting groove's lateral wall through the drive end of shearing drive assembly 5, and then drives shearing part 2 linear sliding.
Other parts of this embodiment are the same as embodiment 1, and thus are not described again.
Example 3:
the present embodiment is further optimized based on the above embodiment 1 or 2, and as shown in fig. 1, an elastic restoring member 7 is further disposed between one end of the cutting portion 2 away from the clamping portion 3 and the inner wall of the mounting box 1.
When shearing drive assembly 5 towards the mounting groove lateral wall of the direction extrusion shearing portion 2 one end that is close to clamping part 3, elasticity piece 7 that resets compresses this moment, and after shearing drive assembly 5 removed the extrusion force, elasticity piece 7 that resets this moment restores to the original state and drives shearing part 2 and slide towards the direction of keeping away from clamping part 3 and reset.
The rest of this embodiment is the same as embodiment 1 or 2, and therefore, the description thereof is omitted.
Example 4:
the present embodiment is further optimized on the basis of any one of the above embodiments 1-3, as shown in fig. 2 and 7, the shearing driving assembly 5 includes a rotating handle 51, a pushing block 52 and a rotating pin 53, the rotating pin 53 is rotatably installed in the installation groove at one end of the shearing portion 2, the rotating pin 53 is sleeved with the pushing block 52, the edge of the pushing block 52 is provided with a pushing arc surface for pushing the side wall of the installation groove, and the top of the pushing block 52 is provided with an active handle 51 extending to the outside of the installation groove.
The pushing block 52 is driven to rotate around the rotating pin shaft 53 by pressing the rotating handle 51, so that the pushing arc surface at the edge of the pushing block 52 is driven to extrude the inner wall of the mounting groove at one end of the shearing part 2 towards the direction close to the clamping block 3, and the shearing part 2 is driven to slide towards the direction close to the clamping part 3.
Other parts of this embodiment are the same as any of embodiments 1 to 3, and thus are not described again.
Example 5:
the present embodiment is further optimized on the basis of any one of the above embodiments 1 to 4, as shown in fig. 1 and 8, the cutting end of the L-shaped sliding clamp extends to the outside of the mounting box 1, and the compression end of the L-shaped sliding clamp is provided with a mounting groove; the shearing end of the L-shaped sliding pliers is provided with a vertical installation seam, and a shearing blade 4 is installed in the installation seam.
Two mounting holes are formed in the shearing end of the L-shaped sliding pliers corresponding to the mounting seam, and two connecting holes are formed in the shearing blade 4 corresponding to the two mounting holes. Inserting the shearing blade 4 into the mounting seam, enabling the cutting edge of the shearing blade 4 to extend to the outer side of the mounting seam towards the clamping part 3, then inserting the connecting bolt into the aligned mounting hole and the connecting hole and screwing down, and further realizing the fixed mounting of the shearing blade 4 in the mounting seam.
Other parts of this embodiment are the same as any of embodiments 1 to 4, and thus are not described again.
Example 6:
the embodiment is further optimized on the basis of any one of the embodiments 1 to 5, as shown in fig. 8, the L-shaped sliding clamp is provided with a waist-shaped lightening hole, and the weight of the L-shaped sliding clamp is effectively lightened by the waist-shaped lightening hole, so that the L-shaped sliding clamp is driven to move more easily and more easily.
Other parts of this embodiment are the same as any of embodiments 1 to 5, and thus are not described again.
Example 7:
the present embodiment is further optimized based on any one of the above embodiments 1 to 6, as shown in fig. 1 and 5, the clamping driving assembly 6 includes an adjusting screw 61 threadedly mounted at one end of the mounting box 1 and extending into the mounting box 1, and one end of the adjusting screw 61 close to the clamping portion 3 is rotatably clamped with the connecting groove.
One end of the mounting box 1, which is far away from the shearing part 2, is provided with a threaded hole corresponding to the clamping part 3, an adjusting screw 61 is installed in the threaded hole in a threaded manner, the pushing end of the adjusting screw 61 extends to the inside of the mounting box 1, and the adjusting end of the adjusting screw 61 extends to the outside of the mounting box 1. A connecting column 62 is arranged on the pushing end of the adjusting screw rod 61, and the other end of the connecting column 62 is connected with the clamping part 3; a knurled adjusting disc is connected to the adjusting end of the adjusting screw 61.
The adjusting screw 61 is rotated through the knurled adjusting disc, so that the adjusting screw 61 is driven to linearly move, and the connecting column 62 pushes the clamping part 3 to slide towards the direction close to the shearing part 2.
Further, the connecting groove is a T-shaped groove, a T-shaped boss is arranged at the pushing end of the adjusting screw 61 corresponding to the inner contour of the T-shaped groove, and the T-shaped boss can rotate in the T-shaped groove and simultaneously pushes the T-shaped groove to linearly move.
Other parts of this embodiment are the same as any of embodiments 1 to 6, and thus are not described again.
Example 8:
the present embodiment is further optimized on the basis of any one of the above embodiments 1 to 7, as shown in fig. 1 and 4, the clamping portion 3 includes a clamping block 31 and a movable block 32, the movable block 32 is slidably disposed at the lower side inside the mounting box 1, one end of the movable block 32 close to the cutting portion 2 is provided with the clamping block 31, and a clamping end of the clamping block 31 extends to the outside of the mounting box 1; one end of the movable block 32, which is far away from the shearing part 2, is provided with a connecting groove.
The clamping end of the clamping block 31 extends to the outer side of the mounting box 1, the connecting end of the clamping block 31 is connected with one end of the movable block 32, and the other end of the movable block 32 is provided with a connecting groove.
In order to stably clamp the hexagonal slotted nut by the clamping block 31, the cross-sectional area of the clamping end of the clamping block 31 is larger than that of the connecting end of the clamping block 31.
Other parts of this embodiment are the same as any of embodiments 1 to 7, and thus are not described again.
Example 9:
this embodiment is further optimized on the basis of any one of the above embodiments 1 to 8, the mounting box 1 is further provided with a limiting part for limiting the locking and shearing of the driving assembly 5, the limiting part is a limiting ring which is rotatably arranged at the top of the mounting box 1 and corresponds to the rotating handle 51, the end of the rotating handle 51 is provided with a limiting groove which is clamped with the limiting ring, the limiting ring is clamped with the limiting groove on the rotating handle 51 by rotating the limiting ring, and the rotation of the rotating handle 51 is limited by the limiting ring.
Other parts of this embodiment are the same as any of embodiments 1 to 8, and thus are not described again.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (10)
1. The safety mounting pliers for the cotter pin comprise a mounting box (1) and are characterized in that the upper side and the lower side of the interior of the mounting box (1) are respectively provided with a shearing part (2) and a clamping part (3) in a sliding mode along the same direction, the shearing end of the shearing part (2) and the clamping end of the clamping part (3) both extend to the exterior of the mounting box (1), and a clamping area is formed between the shearing end of the shearing part (2) and the clamping end of the clamping part (3); one side that is close to clamping part (3) is provided with shearing blade (4) on the shearing end of shearing part (2), the one end of shearing part (2) is provided with drives shearing part (2) towards clamping part (3) linear movement's shearing drive assembly (5), the one end of clamping part (3) is provided with drives clamping part (3) towards clamping part (2) linear movement's centre gripping drive assembly (6).
2. Cotter pin safety mounting pliers according to claim 1, characterized in that the end of the cutting part (2) close to the cutting drive assembly (5) is further provided with a mounting groove for mounting the cutting drive assembly (5), and the end of the clamping part (3) close to the clamping drive assembly (6) is provided with a connecting groove for connecting with the clamping drive assembly (6).
3. Cotter pin safety mounting pliers according to claim 1, characterized in that an elastic reset element (7) is arranged between the end of the cutting part (2) remote from the clamping part (3) and the inner wall of the mounting box 1.
4. The cotter pin safety mounting pliers according to claim 2 or 3, wherein the shearing driving assembly (5) comprises a rotating handle (51), a pushing block (52) and a rotating pin shaft (53), the rotating pin shaft (53) is rotatably mounted in a mounting groove at one end of the shearing part (2), the rotating pin shaft (53) is sleeved with the pushing block (52), the edge of the pushing block (52) is provided with a pushing arc surface for pushing the side wall of the mounting groove, and the top of the pushing block (52) is provided with an active handle (51) extending to the outside of the mounting groove.
5. The cotter pin insurance mounting pliers according to claim 4, wherein the cutting part (2) is an L-shaped sliding pliers, the cutting end of the L-shaped sliding pliers extends to the outside of the mounting box (1), and the pressed end of the L-shaped sliding pliers is provided with a mounting groove; the shearing end of the L-shaped sliding pliers is provided with a vertical installation seam, and a shearing blade (4) is installed in the installation seam.
6. The cotter pin safety setting pliers of claim 5, wherein the L-shaped sliding pliers are provided with waist-shaped lightening holes.
7. The cotter pin insurance mounting pliers according to claim 2 or 3, wherein the clamping driving component (6) comprises an adjusting screw rod (61) which is installed at one end of the mounting box (1) in a threaded mode and extends into the mounting box (1), and one end, close to the clamping part (3), of the adjusting screw rod (61) is rotationally clamped with a connecting groove in the clamping part (3).
8. The cotter pin insurance mounting pliers according to claim 7, wherein the clamping part (3) comprises a clamping block (31) and a movable block (32), the movable block (32) is arranged at the lower side inside the mounting box (1) in a sliding manner, one end of the movable block (32) close to the shearing part (2) is provided with the clamping block (31), and the clamping end of the clamping block (31) extends to the outer side of the mounting box (1); one end of the movable block (32) far away from the shearing part (2) is provided with a connecting groove.
9. The cotter pin safety setting pliers of claim 8, wherein the connecting groove is a T-shaped groove.
10. Cotter pin safety pliers according to any one of claims 1 to 3, wherein the mounting box (1) is further provided with a stop for stopping the locking of the shear drive assembly (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110350289.XA CN113183095B (en) | 2021-03-31 | 2021-03-31 | Cotter pin insurance installation pincers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110350289.XA CN113183095B (en) | 2021-03-31 | 2021-03-31 | Cotter pin insurance installation pincers |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113183095A true CN113183095A (en) | 2021-07-30 |
| CN113183095B CN113183095B (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110350289.XA Active CN113183095B (en) | 2021-03-31 | 2021-03-31 | Cotter pin insurance installation pincers |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113183095B (en) |
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| CN111251207A (en) * | 2018-11-30 | 2020-06-09 | 施耐宝公司 | Button pin for pliers |
| CN209953912U (en) * | 2019-04-15 | 2020-01-17 | 杭州南宇医疗器械有限公司 | Wire cutting pliers |
| CN210537607U (en) * | 2019-07-19 | 2020-05-19 | 江苏世邦建设有限公司 | Landscape plant afforestation beta pruning pincers |
| CN210550751U (en) * | 2019-09-24 | 2020-05-19 | 冯睿 | Multifunctional tool pipe wrench for heating ventilation |
| CN210909093U (en) * | 2019-11-19 | 2020-07-03 | 苏州海卓派沃液压技术有限公司 | Mechanical arm machining clamp |
| CN212399285U (en) * | 2020-05-12 | 2021-01-26 | 张家港威尔斯五金科技有限公司 | Integrative pincers of trimming wire stripping |
| CN212193281U (en) * | 2020-06-09 | 2020-12-22 | 中冶建工集团有限公司 | Positioning type pipe cutting pliers |
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|---|---|
| CN113183095B (en) | 2022-05-10 |
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