Telescopic electric welding machine ground wire clamp

Abstract

The utility model belongs to the technical field of welding machine ground wire clamps, and particularly relates to a telescopic electric welding machine ground wire clamp. Comprising two clamping handles, the middle positions of the two clamping handles are hinged through a pin shaft, the pin shaft is sleeved with a torsion spring, the two clamping handles are connected with clamping plates in a sliding mode, the two clamping plates are connected to the two clamping handles in a bolting mode respectively, the two clamping plates are connected through a grounding wire, any one of the two clamping plates is connected with a wiring terminal in a bolting mode, and the clamping ends of the clamping plates are connected with copper sheets in a bolting mode. And hanging nuts are obliquely welded at the clamping ends of the clamping plates. According to the ground wire clamp, the clamping arms of the ground wire clamp can stretch out and draw back according to needs, so that the ground wire clamp adapts to different sizes of workpieces, and when tubular workpieces are clamped, the outer wall of the tubular workpieces can be clamped, and slipping is prevented.

Description

Technical Field

[0001] The utility model belongs to the technical field of welding machine ground wire clamps, in particular to a retractable welding machine ground wire clamp. Background Art

[0002] The ground wire clamp of the electric welder, also known as the ground clamp or ground wire clamp, has the main function of connecting the ground wire of the electric welder to the welding workpiece to form a welding circuit. It is connected to the negative pole of the power supply and is responsible for transmitting the current required for welding. It plays an important role in ensuring the stability of the current during welding and preventing safety accidents. At present, the ground wire clamp of the electric welder adopts a clamp structure to clamp the plates and pipes to be welded. When welding large-diameter pipes, the maximum opening of the ground wire clamp is small, and it is impossible to clamp the outer wall of the pipe. Especially when the pipe is finally butted, since the pipe has no other open parts, it cannot be clamped on the pipe wall at the open part of the pipe. It can only clamp the bracket. However, due to the poor contact between the bracket and the pipe, it is impossible to ignite and ignite the arc normally, which affects the welding. It requires multiple adjustments or even directly welding the pipe to the bracket, which is inconvenient to operate. Summary of the invention

[0003] The utility model aims to provide a retractable ground wire clamp for electric welding machine to solve the problems existing in the prior art.

[0004] The utility model solves the technical problem by adopting the following technical scheme: a retractable ground wire clamp for electric welding machine, comprising a clamp handle, wherein the clamp handle has two clamp handles, the middle positions of the two clamp handles are hinged by a pin shaft, a torsion spring is sleeved on the pin shaft, the two clamp handles are both slidably connected with clamp plates, the two clamp plates are respectively bolted to the two clamp handles, the two clamp plates are connected by a ground wire, any one of the two clamp plates is bolted with a wiring terminal, the clamping end of the clamp plate is bolted with a copper sheet, and the clamping end of the clamp plate is obliquely welded with a hanging nut.

[0005] Furthermore, the clamp handle is a square tube, and an internal thread hole is opened on the clamp handle, and a positioning bolt is threaded into the internal thread hole. Wing plates are welded at both ends of one side of the clamp handle, and one end of the wing plates of the two clamp handles are staggered and overlapped. The pin shaft is passed through the overlapping part of the wing plates of the two clamp handles, and the two clamp handles are hinged through the wing plates and the pin shaft.

[0006] Furthermore, the clamping end of the splint is provided with an inclined surface, the hanging nut is welded on the inclined surface, the splint is inserted into the inner cavity of the clamp handle, the splint is slidably connected through the inner cavity of the clamp handle, a plurality of through holes are opened on the splint, the positioning bolts pass through the through holes, the splint is bolted to the splint by the positioning bolts, and four clamping teeth are symmetrically arranged on both sides of the clamping end of the splint.

[0007] Furthermore, the copper sheet is bent and bolted to the clamping end of the clamping plate through a bolt pair that penetrates the clamping plate and the copper sheet. The copper sheet faces the clamping surface, and the bending part of the copper sheet is located between the clamping teeth on both sides of the clamping plate and is higher than the clamping teeth.

[0008] Furthermore, one end of the grounding wire is connected to the bolt pair between the clamping plate and the copper sheet, and the other end of the grounding wire is connected to the bolt pair between another clamping plate and the copper sheet after passing through the pin shaft.

[0009] Furthermore, any one of the two clamping plates is bolted to a wiring terminal through a bolt pair, and the wiring terminal is located on a side of the clamping plate away from the clamping surface.

[0010] Furthermore, a hanging bolt is threadedly connected inside the hanging nut. After the hanging bolt is threadedly connected to the hanging nut, the bolt tail of the hanging bolt tilts outwards and protrudes from the hanging nut.

[0011] The utility model has the following beneficial effects:

[0012] 1. The utility model can extend and retract the clamping arm of the ground wire clamp as required, so as to adapt to different sizes of workpieces, and when clamping a tubular workpiece, it can clamp the outer wall of the main pipe to prevent it from slipping.

[0013] 2. According to the different sizes of welding workpieces, different sliding clamps are used, and the clamps are fixed in appropriate positions by positioning bolts, so that the clamping arm of the ground clamp can be extended and retracted to meet the clamping requirements of welding workpieces of different sizes.

[0014] 3. Since the clamping end of the grounding clamp is easy to slip when clamping the tubular workpiece, after the hanging nut is threadedly connected with the hanging bolt, an obtuse angle is formed between the hanging bolt and the clamping plate. When the grounding clamp is clamped on both radial sides of the tubular workpiece, the grounding clamp can be clamped on the tubular workpiece to prevent it from slipping.

[0015] 4. When clamping a plate-shaped workpiece, a larger opening is not required, and the clamping plate can be slid and stored in the clamping handle, thereby reducing the volume of the ground clamp and facilitating operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the utility model.

[0017] Figure 2 It is a structural schematic diagram of the utility model when clamping a tubular workpiece.

[0018] Among them: 1. Clamp handle; 2. Pin shaft; 3. Torsion spring; 4. Clamp plate; 5. Ground wire; 6. Terminal block; 7. Copper sheet; 8. Hanging nut; 9. Internal thread hole; 10. Positioning bolt; 11. Through hole; 12. Bolt pair; 13. Wing plate; 14. Hanging bolt. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with specific embodiments and drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0020] Embodiment 1:

[0021] like Figure 1 As shown, a retractable grounding clamp for an electric welding machine comprises a clamping handle 1. The clamping handles 1 have two parts. The middle positions of the two clamping handles 1 are hinged by a pin shaft 2. A torsion spring 3 is sleeved on the pin shaft 2. The two clamping handles 1 are slidably connected with a clamping plate 4. The two clamping plates 4 are bolted to the two clamping handles 1 respectively. The two clamping plates 4 are connected by a grounding wire 5. Any one of the two clamping plates 4 is bolted with a wiring terminal 6. The clamping end of the clamping plate 4 is bolted with a copper sheet 7. The clamping end of the clamping plate 4 is welded with a hanging nut 8 at an angle.

[0022] The clamping handle 1 is in the shape of a square tube, and is provided with an internal thread hole 9 which passes through the clamping handle 1. A positioning bolt 10 is threadedly connected to the internal thread hole 9. Wing plates 13 are welded to both ends of one side of the clamping handle 1. One end of the wing plates 13 of the two clamping handles 1 are staggered and overlapped, and the pin shaft 2 is connected to the overlapping part of the wing plates 13 of the two clamping handles 1. The two clamping handles 1 are hinged through the wing plates 13 and the pin shaft 2.

[0023] The clamp handle 1 is used to be opened and closed after being grasped by hand, so as to clamp the welding workpiece through the clamp plate 4. At the same time, the clamp handle 1 can make the clamp plate 4 slide therein, thereby playing the role of a clamping arm of the telescopic ground clamp.

[0024] The clamping end of the clamping plate 4 is provided with an inclined surface, and the hanging nut 8 is welded on the inclined surface. The clamping plate 4 is inserted into the inner cavity of the clamping handle 1. The clamping plate 4 is slidably connected to the clamping plate 4 through the inner cavity of the clamping handle 1. A plurality of through holes 11 are opened on the clamping plate 4, and the positioning bolts 10 pass through the through holes 11. The clamping plate 4 is bolted to the clamping plate 4 by the positioning bolts 10. Four clamping teeth are symmetrically arranged on both sides of the clamping end of the clamping plate 4.

[0025] According to the different sizes of the welding workpiece, the clamping plate 4 is slidably fixed at a suitable position by means of the positioning bolts 10, so as to meet the clamping requirements of welding workpieces of different sizes.

[0026] The copper sheet 7 is bent, and is bolted to the clamping end of the clamping plate 4 through a bolt pair 12 that penetrates the clamping plate 4 and the copper sheet 7. The copper sheet 7 faces the clamping surface, and the bending part of the copper sheet 7 is located between the clamping teeth on both sides of the clamping plate 4 and is higher than the clamping teeth. The copper sheet 7 can better transmit current.

[0027] One end of the grounding wire 5 is connected to the bolt pair 12 between the clamping plate 4 and the copper sheet 7 , and the other end of the grounding wire 5 is connected to the bolt pair 12 between the other clamping plate 4 and the copper sheet 7 after passing through the pin shaft 2 .

[0028] Any one of the two clamping plates 4 is bolted to the connecting terminal 6 through a bolt pair 12 , and the connecting terminal 6 is located on a side of the clamping plate 4 away from the clamping surface.

[0029] Embodiment 2:

[0030] like Figure 2 As shown, this embodiment provides a retractable ground wire clamp for electric welding machine, and the structure is basically the same as that of embodiment 1, except that:

[0031] A hanging bolt is threadedly connected inside the hanging nut 8. After the hanging bolt 14 is threadedly connected to the hanging nut 8, the bolt tail of the hanging bolt 14 tilts outwards and protrudes from the hanging nut 8.

[0032] Since the clamping end of the grounding clamp is easy to slip when clamping the tubular workpiece, after the hanging bolt 14 is threadedly connected to the hanging nut 8, an obtuse angle is formed between the hanging bolt 14 and the clamping plate 4. When the grounding clamp is clamped on both radial sides of the tubular workpiece, the grounding clamp can be clamped on the tubular workpiece to prevent it from slipping.

[0033] The working principle of the utility model is:

[0034] When in use, the bottom line of the welding machine is fixed on the terminal 6. For plate-shaped workpieces, a large opening is not required, so the clamping arm of the grounding clamp does not need to be very long, and there is no need to use the hanging bolt 14. The clamp handle 1 is held by hand to open the two clamping plates 4 to clamp the plate-shaped workpiece. At this time, the clamping teeth are stuck on both sides of the workpiece, and the copper sheet 7 higher than the clamping teeth directly contacts the workpiece, so that the welding machine generates a circuit.

[0035] Since the clamping end of the ground wire clamp is easy to slip when clamping a tubular workpiece, when it is necessary to clamp the tubular workpiece, the hanging bolt 14 is screwed into the hanging nut 8. After the hanging bolt 14 is threadedly connected to the hanging nut 8, an obtuse angle is formed between the hanging bolt 14 and the clamping plate 4. When the ground wire clamp is clamped on both radial sides of the tubular workpiece, the ground wire clamp can be clamped on the tubular workpiece to prevent it from slipping.

[0036] If the diameter of the tubular workpiece is large, unscrew the positioning bolt 10, pull the clamp 4 outward from the clamp handle 1, adjust the extension length of the clamp 4 so that the two clamps 4 can clamp the outer wall of the pipe after opening, and fix the clamp 4 with the positioning bolt 10, thereby enlarging the opening of the grounding wire 5 so that it can clamp the pipe with a larger diameter.

[0037] The above-described embodiments are merely descriptions of preferred implementations of the present invention, and are not intended to limit the concept and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by ordinary persons in the art to the technical solution of the present invention shall fall within the scope of protection of the present invention.

[0038] The technology, shape and structure parts not described in detail in the present invention are all known technologies.

Claims

1. A retractable ground wire clamp for electric welding machine, characterized in that: It includes two clamping handles, the middle position of the two clamping handles is hinged by a pin shaft, a torsion spring is sleeved on the pin shaft, the two clamping handles are slidably connected with a clamping plate, the two clamping plates are bolted to the two clamping handles respectively, the two clamping plates are connected by a grounding wire, any one of the two clamping plates is bolted with a wiring terminal, the clamping end of the clamping plate is bolted with a copper sheet, and the clamping end of the clamping plate is welded with a hanging nut at an angle.

2. The retractable welding machine grounding clamp according to claim 1, characterized in that: The clamp handle is in the shape of a square tube, and is provided with an internal thread hole that passes through the clamp handle. A positioning bolt is threaded into the internal thread hole. Wing plates are welded at both ends of one side of the clamp handle. One end of the wing plates of the two clamp handles are staggered and overlapped, and a pin shaft is passed through the overlapping part of the wing plates of the two clamp handles. The two clamp handles are hinged through the wing plates and the pin shaft.

3. The retractable welding machine grounding clamp according to claim 2, characterized in that: The clamping end of the splint is provided with an inclined surface, the hanging nut is welded on the inclined surface, the splint is inserted in the inner cavity of the clamp handle, the splint is slidably connected through the inner cavity of the clamp handle, a plurality of through holes are opened on the splint, the positioning bolts pass through the through holes, the splint is bolted to the splint by the positioning bolts, and four clamping teeth are symmetrically arranged on both sides of the clamping end of the splint.

4. The retractable welding machine grounding clamp according to claim 3, characterized in that: The copper sheet is bent and bolted to the clamping end of the clamping plate through a bolt pair that penetrates the clamping plate and the copper sheet. The copper sheet faces the clamping surface, and the bending part of the copper sheet is located between the clamping teeth on both sides of the clamping plate and is higher than the clamping teeth.

5. The retractable welding machine grounding clamp according to claim 4, characterized in that: One end of the grounding wire is connected to the bolt pair between the clamping plate and the copper sheet, and the other end of the grounding wire is connected to the bolt pair between another clamping plate and the copper sheet after passing through the pin shaft.

6. The retractable ground wire clamp for electric welding machine according to claim 5, characterized in that: Any one of the two clamping plates is bolted to a connecting terminal through a bolt pair, and the connecting terminal is located on a side of the clamping plate away from the clamping surface.

7. The retractable ground wire clamp for electric welding machine according to claim 3, characterized in that: A hanging bolt is threadedly connected inside the hanging nut. After the hanging bolt is threadedly connected to the hanging nut, the bolt tail of the hanging bolt tilts outwards and protrudes from the hanging nut.

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