Electric shock protection device of electric welding machine

Abstract

The utility model discloses an electric shock protection device of an electric welding machine, which relates to the technical field of electric shock protection devices and comprises a box body, a protective cover is arranged on the surface of the box body, a metal shielding body is arranged on the inner wall of the box body, and first metal columns penetrating through the inner wall of the box body are arranged at four corners of the bottom end of the metal shielding body. Four supporting assemblies are arranged at the bottom end of the box body; the four supporting assemblies each comprise a round hole top frame, and the four round hole top frames are arranged at the four corners of the bottom end of the box body correspondingly. The beneficial effects of the utility model are that the square hole disc is moved to be separated from the square block so as to realize the dismounting of the grounding spring, the second metal column pushes the slip ring and the grounding spring after being attached to the slip ring, and the second metal column compresses the grounding spring through the slip ring so as to enable the square hole disc to be tightly attached to the first metal column until the round hole bottom frame is attached to the round hole top frame. Therefore, the grounding spring is very convenient to replace.

Description

Technical Field

[0001] The utility model relates to an anti-electric shock protection device, in particular to an anti-electric shock protection device for an electric welding machine, and belongs to the technical field of anti-electric shock protection devices. Background Art

[0002] The electric welder uses the high-temperature arc generated when the positive and negative poles are short-circuited to melt the solder on the welding rod and the material to be welded, so that the contacted objects are combined. Its structure is equivalent to a high-power transformer. Due to the high working voltage of the electric welder and the relatively complex working environment, coupled with the possible irregular operation of the user, there are high safety hazards, and a special anti-electric shock device needs to be installed.

[0003] Among them, the "anti-electric shock safety protection device for an electric welding machine" disclosed in the application number "CN201710963544.1" "comprises a metal shielding body, an insulating sleeve is connected to the outer surface of the metal shielding body, a grounding spring is connected to the bottom of the metal shielding body, a protective tube is arranged around the grounding spring, four brackets are connected to the lower surface of the grounding spring, an empty slot is arranged in the center of the bracket, a secondary spring is arranged in the empty slot, three terminals are installed on the side of the metal shielding body, a horizontal detection circuit is arranged between the two horizontal terminals, a vertical detection circuit is arranged between the two vertical terminals, a first amplifying circuit is connected to the horizontal detection circuit, a second amplifying circuit is connected to the center of the vertical detection circuit, the first amplifying circuit and the second amplifying circuit are connected to an emergency control switch, and the automatic grounding of the electric welding machine is realized by arranging the metal shielding body and the grounding spring, and the anti-electric shock safety of the electric welding machine is performed by utilizing the principle of equipotential body. Full protection", after further search, it was found that the "anti-electric shock energy-saving device for electric welding machine" disclosed in its application number "CN202010821891.2" "comprises a box body; the outer surface of the box body is composed of a metal shielding cavity and an insulating sleeve, and the bottom surface of the metal shielding cavity is connected with a protective cavity and a No. 1 spring, and the bottom end of the No. 1 spring is connected with a metal block; the top end of the side wall of the box body is symmetrically connected with a slideway, and a slide plate is slidably connected inside the slideway, and a rotating plate is rotatably connected to the outer end of the slide plate, and a pull rod is fixed between the two symmetrical rotating plates, and a slide groove is provided at the inner end of the slide groove, and a slider is slidably connected inside the slide groove, and a card slot is provided on the box body corresponding to the slider; the present invention arranges a pull rod on the box body of the electric welding machine, so that the staff can only pull the electric welding machine in the horizontal direction when moving the electric welding machine, effectively reducing the situation where the metal block at the bottom of the electric welding machine is detached from the ground and the grounding fails during operation, thereby improving the stability and safety of the electric welding machine at work. "

[0004] However, the above two methods still have the following defects: the spring relaxes after long-term use, and its ability to prevent the metal block from leaving the ground decreases, reducing the grounding effect; the spring is fixed at the bottom of the metal shielding body, which is inconvenient to disassemble and replace. Utility Model Content

[0005] The utility model aims to provide an anti-electric shock protection device for an electric welding machine, so as to solve the problem that the existing spring is fixedly arranged at the bottom end of a metal shielding body and is inconvenient to disassemble and replace.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an anti-electric shock protection device for an electric welding machine, comprising a box body, a protective cover is provided on the surface of the box body, a metal shielding body is provided on the inner wall of the box body, four corners of the bottom end of the metal shielding body are provided with a first metal column penetrating the inner wall of the box body, and four supporting components are provided at the bottom end of the box body; the four supporting components all include a circular hole top frame, the four circular hole top frames are respectively arranged at the four corners of the bottom end of the box body, the inside of the four circular hole top frames are provided with a grounding component, and both sides of the four circular hole top frames are provided with a fixing component; the four grounding components all include square blocks, the four square blocks are respectively arranged at one end of four first metal columns, the surfaces of the four square blocks are slidably connected with square hole disks, one end of the four square hole disks are provided with grounding springs, one end of the four grounding springs are provided with slip rings, and one end of the four slip rings are slidably provided with a second metal column.

[0007] As a preferred technical solution of the utility model, the inner walls of the four slip rings are slidably connected with vertical poles, the four vertical poles are made of PVC material, the surfaces of the four second metal columns are provided with two anti-slip blocks, the four slip rings and four square hole plates are made of metal, and the other ends of the four square hole plates are slidably connected to one end of the four first metal columns respectively.

[0008] As a preferred technical solution of the utility model, one end of the four vertical poles is respectively connected to one end of four second metal columns, the surfaces of the four vertical poles are provided with anti-rotation grooves, and the inner walls of the four anti-rotation grooves are slidably connected with anti-rotation blocks connected to the inner wall of the slip ring.

[0009] As a preferred technical solution of the utility model, the inner walls of the four circular hole top frames are provided with reinforcement rings, the bottom ends of the four circular hole top frames are slidably connected to the circular hole bottom frames, the inner walls of the four circular hole bottom frames are provided with support legs, the surfaces of the four support legs are provided with storage grooves that slide with the surface of the second metal column, the four storage grooves are respectively arranged on the outside of the four grounding springs, and the inner walls on both sides of the four storage grooves are provided with anti-slip grooves that slide with the anti-slip blocks.

[0010] As a preferred technical solution of the present utility model, positioning seats are provided on both sides of the four circular hole top frames. Positioning grooves and through holes are formed on the surfaces of the eight positioning seats. Positioning blocks that are slidable in the positioning grooves are provided on both sides of the four circular hole bottom frames. Fixing holes communicating with the through holes are formed on one sides of the eight positioning blocks. The other sides of four of the positioning blocks are respectively slidably connected to one side of the four circular hole top frames, and the other sides of the other four positioning blocks are respectively slidably connected to the other side of the four circular hole top frames.

[0011] As a preferred technical solution of the present utility model, the eight fixing components all include U-shaped frames. The eight U-shaped frames are respectively arranged on one side of the eight positioning seats. Screws are threadedly connected to the surfaces of four of the U-shaped frames. Turntables are provided at one ends of the four screws. Stop disks are provided at the other ends of the four screws. Fixing rods that are engaged with the fixing holes are provided at one ends of the four stop disks. The surfaces of the four fixing rods are respectively slidably connected to the inner walls of the four through holes. Limiting frames are provided on the inner walls of the four U-shaped frames. The four limiting frames are respectively sleeved on the outsides of the four screws.

[0012] As a preferred technical solution of the present utility model, the surface of the protective cover is coated with insulating paint, and insulating handles are provided on both sides of the top end of the protective cover.

[0013] Compared with the related art, the anti-electric shock protection device of an electric welding machine provided by the present utility model has the following beneficial effects:

[0014] 1. Move the square hole plate to make the square hole plate separate from the square block, realizing the disassembly of the grounding spring. After the second metal column fits the slip ring, it will push the slip ring and the grounding spring. The second metal column compresses the grounding spring through the slip ring, making the square hole plate closely adhere to the first metal column until the circular hole bottom frame fits the circular hole top frame, completing the replacement of the grounding spring, which is very convenient;

[0015] 2. The first metal column will limit the rotation of the square hole plate through the square block, and the vertical rod will limit the rotation of the slip ring through the rotation suppression block and the rotation suppression groove, preventing the grounding spring from being twisted due to the rotation of the slip ring and the square hole plate, and prolonging the service life of the grounding spring;

[0016] 3. When the circular hole bottom frame moves upward, it drives the positioning block to move, and the positioning block will slide into the positioning groove, completing the alignment of the circular hole top frame and the circular hole bottom frame, and improving the installation efficiency of the circular hole bottom frame. Description of the Drawings

[0017] Figure 1 is a structural schematic diagram of the present utility model;

[0018] Figure 2 is a side sectional structural schematic diagram of the present utility model;

[0019] Figure 3 Structural schematic diagram of the support component of the present utility model;

[0020] Figure 4 For the present utility model Figure 3 Enlarged structural schematic diagram at position A;

[0021] Figure 5 Sectional structural schematic diagram of the support component of the present utility model;

[0022] Figure 6 Exploded structural schematic diagram of the grounding component of the present utility model.

[0023] In the figure: 1, box body; 2, protective cover; 3, metal shielding body; 4, insulating handle; 5, first metal column; 6, support component; 601, round hole top frame; 602, reinforcing ring; 603, round hole bottom frame; 604, support leg; 605, storage groove; 606, anti - detachment groove; 607, positioning seat; 608, positioning groove; 609, through hole; 610, positioning block; 611, fixing hole; 7, grounding component; 701, square block; 702, square hole plate; 703, grounding spring; 704, slip ring; 705, vertical rod; 706, second metal column; 707, anti - detachment block; 708, anti - rotation groove; 709, anti - rotation block; 8, fixing component; 801, C - shaped frame; 802, screw; 803, retaining disc; 804, fixing rod; 805, limiting frame. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1:

[0026] Please refer to Figure 1-6 , the present utility model provides an anti - electric shock protection device for a welding machine, including a box body 1. A protective cover 2 is fixedly arranged on the surface of the box body 1, a metal shielding body 3 is fixedly arranged on the inner wall of the box body 1. Four corners at the bottom end of the metal shielding body 3 are fixedly provided with first metal columns 5 penetrating the inner wall of the box body 1, and four support components 6 are arranged at the bottom end of the box body 1;

[0027] The surface of the protective cover 2 is coated with insulating paint. Both sides at the top end of the protective cover 2 are fixedly provided with insulating handles 4. The protective cover 2 protects the box body 1 of the welding machine, only exposing the operation surface and the bottom end of the box body 1 of the welding machine. The insulating paint improves the anti - leakage performance of the protective cover 2, and the insulating handles 4 facilitate pulling the protective cover 2;

[0028] The four supporting components 6 each include a round hole top frame 601, which are respectively fixedly arranged at the four corners of the bottom end of the box body 1, and the four round hole top frames 601 are each provided with a grounding component 7 inside, and both sides of the four round hole top frames 601 are each provided with a fixing component 8, and the round hole top frame 601 is used to support the box body 1;

[0029] The inner walls of the four circular hole top frames 601 are fixed with reinforcement rings 602, the bottom ends of the four circular hole top frames 601 are slidably connected with the circular hole bottom frames 603, the inner walls of the four circular hole bottom frames 603 are fixed with support legs 604, the surfaces of the four support legs 604 are provided with storage grooves 605 that slide with the surfaces of the second metal pillars 706, the four storage grooves 605 are respectively sleeved on the outside of the four grounding springs 703, the inner walls on both sides of the four storage grooves 605 are provided with anti-slip grooves 606 that slide with the anti-slip blocks 707, the reinforcement ring 602 supports the inner wall of the circular hole top frame 601 to enhance the impact resistance of the circular hole top frame 601, and the support legs 604 support the box body 1 through the circular hole bottom frame 603 and the circular hole top frame 601;

[0030] Positioning seats 607 are fixedly provided on both sides of the four circular hole top frames 601, and positioning grooves 608 and through holes 609 are provided on the surfaces of the eight positioning seats 607. Positioning blocks 610 that slide with the positioning grooves 608 are fixedly provided on both sides of the four circular hole bottom frames 603, and one side of the eight positioning blocks 610 is provided with a fixing hole 611 that is connected with the through holes 609, wherein the other sides of the four positioning blocks 610 are respectively slidably connected to one side of the four circular hole top frames 601, and the other sides of the other four positioning blocks 610 are respectively slidably connected to the other sides of the four circular hole top frames 601, and the positioning blocks 610 slide into the positioning grooves 608 to complete the alignment of the circular hole top frame 601 and the circular hole bottom frame 603, thereby improving the installation efficiency of the circular hole bottom frame 603;

[0031] Specifically, the circular hole top frame 601 and the circular hole bottom frame 603 are fixedly connected through the fixing assembly 8. At this time, the supporting legs 604 support the box body 1 through the circular hole bottom frame 603 and the circular hole top frame 601, and the circular hole top frame 601 and the circular hole bottom frame 603 are sleeved on the outside of the grounding spring 703. When the grounding spring 703 needs to be disassembled and replaced, the fixing assembly 8 is first released, and then the circular hole bottom frame 603 is moved downward to separate the circular hole bottom frame 603 from the circular hole top frame 601, and the grounding spring 703 and the slip ring 704 are exposed. Then, the grounding spring 703 is pulled along, and the grounding spring 703 drives the square hole plate 702 to move downward, causing the square hole plate 702 to separate from the block 701 and the first metal column 5, and the disassembly of the grounding spring 703 is completed, which is very convenient.

[0032] Embodiment 2:

[0033] The four grounding components 7 each include a block 701, the four blocks 701 are fixedly arranged at one end of the four first metal pillars 5, the surfaces of the four blocks 701 are slidably connected with a square hole disk 702, one end of the four square hole disks 702 are provided with a grounding spring 703, one end of the four grounding springs 703 are fixedly provided with a slip ring 704, and one end of the four slip rings 704 are slidably provided with a second metal pillar 706;

[0034] The inner walls of the four slip rings 704 are slidably connected with the vertical poles 705, and the four vertical poles 705 are made of PVC material. Two anti-drop blocks 707 are fixed on the surfaces of the four second metal pillars 706. The four slip rings 704 and the four square hole plates 702 are made of metal. The other ends of the four square hole plates 702 are respectively slidably connected to one end of the four first metal pillars 5. The four vertical poles 705 are made of PVC material to prevent the vertical poles 705 from generating induced electromotive force when the grounding spring 703 guides the leakage current. The leakage current is introduced into the ground through the first metal pillar 5, the square hole plate 702, the grounding spring 703, the slip ring 704 and the second metal pillar 706, so as to prevent the box 1 of the electric welding machine from being electrified and prevent the staff from being electrically shocked during operation.

[0035] One end of the four vertical rods 705 is fixedly connected to one end of the four second metal columns 706 respectively, and the surfaces of the four vertical rods 705 are provided with anti-rotation grooves 708. The inner walls of the four anti-rotation grooves 708 are slidably connected with anti-rotation blocks 709 connected to the inner wall of the slip ring 704. When sliding downward, the slip ring 704 slides downward along the surface of the vertical rod 705 until the slip ring 704 is supported by the second metal column 706. The vertical rod 705 limits the rotation of the slip ring 704 through the anti-rotation block 709 and the anti-rotation groove 708, so as to prevent the grounding spring 703 from being twisted due to the rotation of the slip ring 704, thereby extending the service life of the grounding spring 703;

[0036] Specifically, when replacing the grounding spring 703, first separate the round hole top frame 601 and the round hole bottom frame 603, move the square hole plate 702 upward to make the square hole plate 702 sleeved on the surface of the square block 701. Then move the round hole bottom frame 603 upward. The round hole bottom frame 603 will drive the anti-detachment block 707 and the second metal column 706 to move upward through the anti-detachment groove 606. The second metal column 706 pushes the vertical rod 705 to move upward, so that the slip ring 704 is sleeved on the surface of the vertical rod 705. After the second metal column 706 fits with the slip ring 704, it pushes the slip ring 704 and the grounding spring 703. The grounding spring 703 will push the square hole plate 702 upward, making the square hole plate 702 abutted by the first metal column 5. Then the second metal column 706 compresses the grounding spring 703 through the slip ring 704 until the round hole bottom frame 603 fits with the round hole top frame 601, completing the replacement of the grounding spring 703, which is very convenient. It should be emphasized that after the replacement of the grounding spring 703, it is in a compressed state. The square hole plate 702 will be closely attached to the first metal column 5 under the elastic force of the grounding spring 703, and the slip ring 704 will be closely attached to the second metal column 706 under the elastic force of the grounding spring 703. The leakage current of the electric welding machine is introduced into the ground through the first metal column 5, the square hole plate 702, the grounding spring 703, the slip ring 704 and the second metal column 706, preventing the box body 1 of the electric welding machine from being electrified and preventing the staff from getting an electric shock during operation.

[0037] Embodiment 3:

[0038] Each of the eight fixing components 8 includes a C-shaped frame 801. The eight C-shaped frames 801 are respectively fixedly arranged on one side of the eight positioning seats 607. Screws 802 are threadedly connected to the surfaces of four of the C-shaped frames 801. A turntable is fixedly provided at one end of each of the four screws 802, and a retaining disc 803 is fixedly provided at the other end of each of the four screws 802. A fixing rod 804 that engages with the fixing hole 611 is fixedly provided at one end of each of the four retaining discs 803. The surfaces of the four fixing rods 804 are respectively slidably connected to the inner walls of the four through holes 609. Limit frames 805 are fixedly provided on the inner walls of the four C-shaped frames 801, and the four limit frames 805 are respectively sleeved outside the four screws 802;

[0039] Specifically, the turntable is rotated to drive the screw rod 802 to move, and the screw rod 802 will move toward the direction close to the positioning block 610 while rotating. The screw rod 802 drives the fixing rod 804 to move through the baffle plate 803, so that the fixing rod 804 slides into the fixing hole 611 until the fixing rod 804 is supported by the inner wall of one end of the fixing hole 611. At this time, the fixing rod 804 will support the positioning block 610 in the vertical direction. The fixing rod 804 cooperates with the positioning seat 607 that supports the positioning block 610 in the horizontal direction to complete the positioning of the positioning block 611. 0 is fixed to realize the fixed connection between the round hole top frame 601 and the round hole bottom frame 603, and the installation of the round hole bottom frame 603 is completed. The turntable is rotated in the reverse direction to cause the fixing rod 804 to disengage from the fixing hole 611, and the fixation of the round hole bottom frame 603 is released. When the fixing rod 804 is disengaged from the fixing hole 611, the baffle plate 803 moving in the reverse direction is blocked by the limit frame 805, and the turntable cannot be rotated further. It is not necessary to determine that the fixing rod 804 is disengaged from the fixing hole 611 after the fixing rod 804 is disengaged from the through hole 609, which reduces the number of turns of the turntable and is more convenient.

[0040] When in use, first, the fixing rod 804 is disengaged from the fixing hole 611 by rotating the turntable to release the fixation of the circular hole bottom frame 603, then the circular hole top frame 601 and the circular hole bottom frame 603 are separated, and the square hole plate 702 of the grounding spring 703 is moved to cause the square hole plate 702 to be disengaged from the block 701, so as to realize the removal of the grounding spring 703. When a new grounding spring 703 needs to be installed, the square hole plate 702 of the new grounding spring 703 is moved upward to cause the square hole plate 702 to be sleeved on the surface of the block 701, and then the circular hole bottom frame 603 is moved upward, and the circular hole bottom frame 603 will pass through the anti-slip groove 606 and the anti-slip groove 607. The block 707 and the second metal column 706 will push the vertical rod 705 to move upward, so that the slip ring 704 is sleeved on the surface of the vertical rod 705. After the second metal column 706 is fitted with the slip ring 704, it pushes the slip ring 704 and the grounding spring 703. The grounding spring 703 will push the square hole plate 702 to move upward, so that the square hole plate 702 is supported by the first metal column 5. Then, the second metal column 706 will compress the grounding spring 703 through the slip ring 704, so that the square hole plate 702 is closely attached to the first metal column 5, until the round hole bottom frame 603 is fitted with the round hole top frame 601, and the replacement of the grounding spring 703 is completed, which is very convenient.

[0041] It should be emphasized that after the round hole top frame 601 and the round hole bottom frame 603 are fixed, the grounding spring 703 is in a compressed state, the square hole plate 702 is pressed against the first metal column 5 by the elastic force of the grounding spring 703, and the slip ring 704 is pressed against the second metal column 706 by the elastic force of the grounding spring 703, and the leakage current of the electric welder is introduced into the ground through the first metal column 5, the square hole plate 702, the grounding spring 703, the slip ring 704 and the second metal column 706, so as to prevent the box 1 of the electric welder from being charged and prevent the staff from being electrically shocked during operation;

[0042] It should also be added that the first metal column 5 limits the rotation of the square hole disk 702 through the square block 701, and the vertical rod 705 limits the rotation of the slip ring 704 through the anti-rotation block 709 and the anti-rotation groove 708, thereby preventing the grounding spring 703 from being twisted due to the rotation of the slip ring 704 and the square hole disk 702, thereby extending the service life of the grounding spring 703, and the circular hole bottom frame 603 drives the positioning block 610 to move when moving upward, and the positioning block 610 will slide into the positioning groove 608 to complete the alignment of the circular hole top frame 601 and the circular hole bottom frame 603, thereby improving the installation efficiency of the circular hole bottom frame 603.

[0043] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-electric shock protection device for an electric welding machine, comprising a box (1), characterized in that: The surface of the box (1) is provided with a protective cover (2), the inner wall of the box (1) is provided with a metal shield (3), the four corners at the bottom end of the metal shield (3) are provided with first metal columns (5) penetrating the inner wall of the box (1), and the bottom end of the box (1) is provided with four support components (6); The four supporting components (6) each comprise a circular hole top frame (601), the four circular hole top frames (601) being respectively arranged at four corners of the bottom end of the box body (1), the four circular hole top frames (601) each being provided with a grounding component (7) inside, and the four circular hole top frames (601) each being provided with a fixing component (8) on both sides; The four grounding components (7) each comprise a block (701), the four blocks (701) being respectively arranged at one end of four first metal pillars (5), the surfaces of the four blocks (701) being slidably connected with a square hole disk (702), one end of the four square hole disks (702) being provided with a grounding spring (703), one end of the four grounding springs (703) being provided with a slip ring (704), and one end of the four slip rings (704) being slidably provided with a second metal pillar (706).

2. The anti-electric shock protection device for an electric welding machine according to claim 1, characterized in that: The inner walls of the four slip rings (704) are slidably connected to the vertical rods (705), the four vertical rods (705) are made of PVC material, the surfaces of the four second metal columns (706) are provided with two anti-slip blocks (707), the four slip rings (704) and the four square hole plates (702) are made of metal, and the other ends of the four square hole plates (702) are slidably connected to one end of the four first metal columns (5) respectively.

3. The anti-electric shock protection device for an electric welding machine according to claim 2, characterized in that: One end of the four vertical rods (705) is connected to one end of four second metal pillars (706) respectively, and the surfaces of the four vertical rods (705) are provided with anti-rotation grooves (708), and the inner walls of the four anti-rotation grooves (708) are slidably connected with anti-rotation blocks (709) connected to the inner wall of the slip ring (704).

4. The anti-electric shock protection device for an electric welding machine according to claim 2, characterized in that: The inner walls of the four circular hole top frames (601) are all provided with reinforcement rings (602), the bottom ends of the four circular hole top frames (601) are all slidably connected to the circular hole bottom frames (603), the inner walls of the four circular hole bottom frames (603) are all provided with support legs (604), the surfaces of the four support legs (604) are all provided with receiving grooves (605) that slide with the surface of the second metal column (706), the four receiving grooves (605) are respectively sleeved on the outside of the four grounding springs (703), and the inner walls on both sides of the four receiving grooves (605) are all provided with anti-slip grooves (606) that slide with the anti-slip blocks (707).

5. The anti-electric shock protection device for an electric welding machine according to claim 4, characterized in that: Positioning seats (607) are provided on both sides of the four circular hole top frames (601). Positioning grooves (608) and through holes (609) are formed on the surfaces of the eight positioning seats (607). Positioning blocks (610) that slide with the positioning grooves (608) are provided on both sides of the four circular hole bottom frames (603). Fixing holes (611) communicating with the through holes (609) are formed on one sides of the eight positioning blocks (610). The other sides of four of the positioning blocks (610) are respectively slidably connected to one sides of the four circular hole top frames (601), and the other sides of the other four positioning blocks (610) are respectively slidably connected to the other sides of the four circular hole top frames (601).

6. The anti-electric shock protection device for an electric welding machine according to claim 5, characterized in that: The eight fixing components (8) each include a C-shaped frame (801). The eight C-shaped frames (801) are respectively arranged on one sides of the eight positioning seats (607). Screws (802) are threadedly connected to the surfaces of four of the C-shaped frames (801). One ends of the four screws (802) are each provided with a turntable, and the other ends of the four screws (802) are each provided with a retaining disc (803). Fixing rods (804) that engage with the fixing holes (611) are provided at one ends of the four retaining discs (803). The surfaces of the four fixing rods (804) are respectively slidably connected to the inner walls of the four through holes (609). Limiting frames (805) are provided on the inner walls of the four C-shaped frames (801). The four limiting frames (805) are respectively sleeved on the exteriors of the four screws (802).

7. The anti-electric shock protection device for an electric welding machine according to claim 1, characterized in that: The surface of the protective cover (2) is coated with insulating paint. Insulating handles (4) are provided on both sides of the top end of the protective cover (2).

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