CN218215746U

CN218215746U - Electric welding grounding clamp

Info

Publication number: CN218215746U
Application number: CN202222599188.9U
Authority: CN
Inventors: 杜蒙军
Original assignee: Zhejiang Lishuai Magnetics Co ltd
Current assignee: Zhejiang Lishuai Magnetics Co ltd
Priority date: 2022-09-29
Filing date: 2022-09-29
Publication date: 2023-01-03
Anticipated expiration: 2032-09-29

Abstract

The utility model discloses an electric welding grounding clamp, which comprises a first clamping arm and a second clamping arm which are hinged with each other, wherein both the two clamping arms comprise a handheld end and a clamping end; the clamping end of the first clamping arm is provided with a first clamping piece, the clamping end of the second clamping wall is provided with a second clamping piece, the first clamping piece is provided with a plane clamping part, the second clamping piece is provided with an arc surface clamping part, the plane clamping part and the arc surface clamping part are oppositely arranged to form an openable clamping opening, and the electric conductivity of the first clamping piece is greater than that of the second clamping piece; and the first clamping arm is provided with a wire holder electrically communicated with the first clamping piece. The utility model discloses an electric welding ground connection pincers compact structure, it is convenient to use, long service life, the circuit is simple, and the electric current is unobstructed.

Description

Electric welding grounding clamp

Technical Field

The utility model belongs to the technical field of the electric welding anchor clamps, concretely relates to electric welding ground connection pincers.

Background

During electric welding, a workpiece to be welded needs to be connected with a grounding wire of welding equipment by using grounding clamps, when the welding device is used, the grounding clamps are connected with the grounding wire of the welding equipment, then a welding piece needing grounding is clamped by the grounding clamps, and a welding rod of the electric welding equipment forms a loop during welding. Current ground connection pincers are the welding piece of adaptation different shapes to keep sufficient clamping-force, the exposed core of two arm locks of ground connection pincers all is equipped with the arc holding piece, and two arc holding pieces adopt the good copper sheet of electric conductive property to make more, and two arc holding pieces all conduct electricity, and in order to guarantee that the electric current forms a return circuit, still the overlap joint has electrically conductive bridge between two arc holding pieces. The grounding clamp with the structure has the following disadvantages: firstly, the arc-shaped clamping pieces and the welding pieces are in line contact, the contact area is small, the instantaneous current is large, the heat is high, the arc-shaped clamping pieces are easy to puncture, and the grounding clamp is damaged; moreover, the current on one of the clamping pieces needs to reach the other clamping piece through the conductive bridge and then reach the wire holder, so that the circuit is complex, the current is not smooth enough, and the grounding effect is influenced.

Disclosure of Invention

The utility model discloses electric welding ground connection pincers fragile among the prior art, the not enough unobstructed problem of electric current provides an electric welding ground connection pincers.

The invention aims to be realized by the following technical scheme:

an electric welding grounding clamp comprises a first clamping arm and a second clamping arm which are hinged with each other, wherein both the first clamping arm and the second clamping arm comprise a handheld end and a clamping end; the clamping end of the first clamping arm is provided with a first clamping sheet, the clamping end of the second clamping wall is provided with a second clamping sheet, the first clamping sheet is provided with a plane clamping part, the second clamping sheet is provided with an arc surface clamping part, the plane clamping part and the arc surface clamping part are oppositely arranged to form an openable clamping opening, and the electric conductivity of the first clamping sheet is greater than that of the second clamping sheet; and the first clamping arm is provided with a wire holder electrically communicated with the first clamping piece. In the scheme, the two clamping parts adopt different clamping surfaces, and the plane clamping part and the arc surface clamping part are matched with each other, so that the two clamping parts can be adapted to welding parts in different shapes and can keep enough clamping force; the plane clamping part is in surface contact with the welding part, the arc surface clamping part is in line contact with the welding part, the contact area of the first clamping piece and the welding part is larger than that of the second clamping piece and the welding part, and the electric conductivity of the first clamping piece is larger than that of the second clamping piece, so that current can be guided to directly reach the wiring seat from the first clamping piece, a conductive bridge is not required to be connected between the two clamping pieces, and the circuit is simple and smooth; meanwhile, the contact area of the first clamping piece and the welding piece is large, the problem of large instantaneous current and high heat is not easy to occur, and the grounding clamp is not easy to burn out.

Preferably, the first clamping piece and the wire holder are integrally formed copper parts, and the second clamping piece is an iron copper-plated part. The first clamping piece and the wire holder are integrally arranged, so that a circuit is further simplified, and smooth current is ensured.

Preferably, an assembly hole is formed in the clamping end of the first clamping arm, the wire holder penetrates out of the assembly hole, the wire holder is located on the outer side of the first clamping arm, and the first clamping piece is located on the inner side of the first clamping arm. The assembling mode is quick and convenient.

Preferably, the first clamping piece further comprises a connecting portion connected with the wire holder, the clamping end of the first clamping arm is provided with a first assembling groove, the planar clamping portion is clamped and embedded in the first assembling groove, and the clamping surface of the planar clamping portion protrudes out of the first assembling groove. By the aid of the assembling mode, assembling stability and assembling precision of the first clamping piece can be improved, and the whole grounding clamp is compact in structure.

Preferably, a plurality of grooves are concavely arranged on the clamping surface of the plane clamping part, and the grooves are arranged in the middle of the clamping surface at intervals. The arrangement can ensure that the contact area of the plane clamping part and the welding part is large enough, and can improve the clamping force of the plane clamping part.

Preferably, the second clamping piece further comprises assembling portions formed on two sides of the arc-shaped clamping portion, the clamping end of the second clamping arm is provided with a second assembling groove, the assembling portions are embedded in the second assembling groove in a clamping mode, and at least part of the arc-shaped clamping portion protrudes out of the second assembling groove. By the assembly mode, the assembly stability and the assembly precision of the second clamping piece can be improved, and the structure of the whole grounding clamp is more compact.

Preferably, the middle parts of the first clamping arm and the second clamping arm are hinged through a hinged shaft, and a torsion spring for keeping clamping force is sleeved on the hinged shaft.

Preferably, the first clamping arm is detachably and fixedly connected with the arc piece. The setting up of arc starting sheet makes things convenient for the electric welding ignition, avoids directly igniteing on welding piece and electrode holders, causes the damage of welding piece and electrode holders, and the arc starting sheet can be dismantled, convenient the change.

Preferably, the arc starting sheet is an integrated copper piece and comprises a lapping part and an arc starting part, the lapping part is lapped on the clamping end of the first clamping arm through a bolt, and the arc starting part extends towards the side of the clamping end. Above-mentioned setting makes things convenient for the arc starting piece assembly, and can make the structure of whole ground connection pincers more compact.

Compared with the prior art, the utility model discloses following beneficial effect has: the clamping parts of the two clamping pieces adopt different structures and are matched with the plane clamping part and the cambered surface clamping part, the two clamping parts are in surface contact and line contact with an electric welding piece respectively, so that the contact areas of the two clamping pieces and the electric welding piece are different, the electric conductivity of the two clamping pieces is different, the guide current directly reaches the wire holder from the first clamping piece, a conductive bridge does not need to be lapped between the two clamping pieces, and the circuit is simple and smooth; the contact area between the electric welding piece and the plane clamping part is large, so that the problem of large instantaneous current and high heat is not easy to occur, and the service lives of the clamping sheet and the grounding clamp are prolonged; the first clamping piece and the wire holder are integrally formed, so that the circuit is further simplified, and the current is ensured to be smooth; the assembly groove is formed in the clamping end, so that the assembly stability and the assembly precision of the two clamping pieces are improved; the arrangement of the arc striking piece is convenient for electric welding ignition and arc striking.

Drawings

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

FIG. 2 is a schematic view of the first and second clamp arms of the present invention;

FIG. 3 is a schematic structural view of the first clamping piece and the wire holder of the present invention;

FIG. 4 is a schematic structural view of a second clamping piece of the present invention;

FIG. 5 is a schematic structural view of a middle arcing piece of the present invention;

the labels in the figure are: a first clamp arm 11; a second clamp arm 12; a handheld end 13; a clamping end 14; a hinge shaft 15; a torsion spring 16; fitting holes 17; a second fitting groove 18; a first clamping piece 20; a plane holding portion 21; a recess 211; a connecting portion 22; a second clamping piece 30; a cambered surface clamping portion 31; the fitting portion 32; an arc starting piece 40; a lap portion 41; an arcing portion 42; a wire holder 50.

Detailed Description

The invention will be further described with reference to the embodiments shown in the drawings to which:

as shown in fig. 1-5, the present embodiment discloses an electric welding ground clamp, which includes a first clamping arm 11 and a second clamping arm 12 hinged to each other, both of which include a handheld end 13 and a clamping end 14, the middle portions of both of the clamping arms are hinged to each other through a hinge shaft 15, and a torsion spring 16 for maintaining the clamping force is sleeved on the hinge shaft 15.

The clamping end 14 of first arm lock 11 has first centre gripping piece 20 through the bolt rigid coupling, the clamping end 14 of second centre gripping wall has second centre gripping piece 30 through the bolt rigid coupling, wherein first centre gripping piece 20 has plane clamping part 21, second centre gripping piece 30 has cambered surface clamping part 31, plane clamping part 21 sets up the centre gripping mouth that forms one and can open and shut with cambered surface clamping part 31 relatively, and the electric conductivity of first centre gripping piece 20 is greater than the electric conductivity of second centre gripping piece 30, first centre gripping piece 20 is copper spare, second centre gripping piece 30 is indisputable copper-plated finished piece. The two clamping parts adopt different clamping surfaces, the plane clamping part 21 and the arc surface clamping part 31 are matched with each other, so that the welding parts in different shapes can be adapted, and enough clamping force can be kept; the contact area of the plane clamping part 21 and the welding part is small, the contact area of the arc surface clamping part 31 and the welding part is small, and the electric conductivity of the first clamping piece 20 is larger than that of the second clamping piece 30, so that the current can be guided to directly reach the wiring seat 50 from the first clamping piece 20, a conductive bridge is not required to be connected between the two clamping pieces, and the circuit is simple and smooth; meanwhile, the contact area of the first clamping piece 20 and the welding piece is large, the problem of large instantaneous current and high heat is not easy to occur, the grounding clamp is not easy to burn out, and the service life is long.

The clamping end 14 of the first clamping arm 11 is provided with a wire holder 50 electrically connected to the first clamping piece 20, in this embodiment, in order to further simplify the circuit and ensure smooth current, the wire holder 50 and the first clamping piece 20 are integrally formed as a copper piece; an assembly hole 17 is opened at the clamping end 14 of the first clamping arm 11, the wire holder 50 penetrates out of the assembly hole 17, the wire holder 50 is located at the outer side of the first clamping arm 11, the first clamping piece 20 is located at the inner side of the first clamping arm 11, and during assembly, only the fixedly connection of the first clamping piece 20 and the first clamping arm 11 needs to be completed, so that the wire holder 50 does not need to be assembled additionally, and the assembly is convenient.

The first clamping piece 20 further comprises a connecting part 22 connected with the wire holder 50, the clamping end 14 of the first clamping arm 11 is provided with a first assembling groove, the plane clamping part 21 is clamped in the first assembling groove and fixed through a bolt, the assembling groove can improve the assembling stability and the assembling precision of the first clamping piece 20, and the structure of the whole grounding clamp is more compact; the clamping surface of the plane clamping part 21 protrudes out of the first assembling groove so as to ensure that the plane clamping part 21 can be fully contacted with a welding part for conduction; many recesses 211 are concavely provided on the clamping face of the plane clamping part 21, the recesses 211 are arranged at the middle part of the clamping face at intervals to ensure that the contact area of the plane clamping part 21 and the welding part is large enough and improve the clamping force of the plane clamping part 21.

The second clamping piece 30 further comprises assembling portions 32 formed on two sides of the arc-shaped clamping portion 31, the clamping end 14 of the second clamping arm 12 is provided with a second assembling groove 18, the assembling portions 32 are clamped in the second assembling groove 18 and fixed through bolts, the assembling mode can improve the assembling stability and assembling precision of the second clamping piece 30, and the structure of the whole grounding clamp is more compact; the arc clamping portion 31 at least partially protrudes from the second assembling groove 18 to cooperate with the plane clamping portion 21 to clamp the welding member.

The first clamping arm 11 is detachably and fixedly connected with an arc sheet 40, the arc sheet 40 is convenient for electric welding ignition, the damage of a welding part and an electric welding clamp caused by direct ignition on the welding part and the electric welding clamp is avoided, and the arc sheet 40 is detachable and convenient to replace and maintain; the arc striking plate 40 is an integrated copper piece and comprises a lapping part 41 and an arc striking part 42, wherein the lapping part 41 is lapped on the clamping end 14 of the first clamping arm 11 through a bolt and shares the bolt with the first clamping plate 20 so as to simplify the assembly; the arcing portion 42 extends laterally of the clamping end 14 to facilitate ignition and arcing.

The utility model discloses an electric welding ground connection pincers compact structure, it is convenient to use, long service life, the circuit is simple, and the electric current is unobstructed.

It is to be understood that in the claims, the specification of the present invention, all "including … …" are to be understood in an open meaning, i.e., in a meaning equivalent to "comprising at least … …", and not in a closed meaning, i.e., in a meaning not to be understood as "comprising only … …". 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.

The above description is only the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and those skilled in the art should be able to make changes, modifications, additions or substitutions within the scope of the present invention.

Claims

1. An electric welding grounding clamp comprises a first clamping arm and a second clamping arm which are hinged with each other, wherein both the two clamping arms comprise a handheld end and a clamping end; and the first clamping arm is provided with a wire holder electrically communicated with the first clamping piece.

2. An electric welding ground clamp according to claim 1, wherein said first holding piece and said wire holder are made of copper and said second holding piece is made of copper.

3. An electric welding ground clamp according to claim 2, wherein said clamping end of said first clamping arm defines an assembly opening, said wire holder extends through said assembly opening, said wire holder is disposed on an outer side of said first clamping arm, and said first clamping tab is disposed on an inner side of said first clamping arm.

4. An electric welding ground clamp according to claim 3, wherein said first clamping piece further comprises a connecting portion for connecting with the wire holder, the clamping end of said first clamping arm has a first assembling groove, said planar clamping portion is inserted into the first assembling groove, and the clamping surface of the planar clamping portion protrudes out of the first assembling groove.

5. The earth welding tongs as claimed in claim 4, wherein the holding surfaces of the planar holding portions are recessed with a plurality of grooves spaced at the middle of the holding surfaces.

6. An electric welding ground clamp according to claim 1, wherein said second clamping piece further comprises mounting portions formed on both sides of said arc-shaped clamping portion, said clamping end of said second clamping arm has a second mounting groove, said mounting portions are snap-fitted into said second mounting groove, and said arc-shaped clamping portion at least partially protrudes from said second mounting groove.

7. An electric welding ground clamp according to claim 1, wherein the first and second clamp arms are hinged at their middle portions by a hinge shaft, and a torsion spring for maintaining a clamping force is fitted around the hinge shaft.

8. An electric welding ground clamp according to any one of claims 1-7, wherein said first clamp arms are removably secured to an arc piece.

9. An electric welding ground clamp according to claim 8, wherein said arc striking plate is a one-piece copper member including a connecting portion and an arc striking portion, said connecting portion being bolted to the clamping end of the first clamping arm, said arc striking portion extending laterally of the clamping end.