Sheet metal part welding positioning equipment

Abstract

The invention discloses sheet metal part welding positioning equipment which comprises a supporting unit, the supporting unit comprises a welding platform, and a first weldment supporting plate and a second weldment adjusting plate are symmetrically arranged on the welding platform; the weldment transferring unit comprises two mounting plates fixedly mounted on the welding platform, the two mounting plates are symmetrically arranged, mounting shafts are symmetrically mounted on the mounting plates, one mounting shaft is rotationally connected with a first steering supporting rod, the other mounting shaft is rotationally connected with a second steering supporting rod, and the first steering supporting rod is rotationally connected with a second steering supporting rod; according to the sheet metal part welding and positioning equipment, through cooperation of the first weldment supporting plate, the second weldment adjusting plate and the second weldment clamping assembly on the bearing plate, it can be ensured that the relative position error of the two sheet metal parts before welding is controlled within the extremely small range, the quality problems that the size is out of tolerance, and welding seams are not uniform are effectively solved, and the product quality is improved. And the assembling performance and appearance quality of the product are greatly improved, and the strict requirement of the high-end manufacturing industry for precise sheet metal part welding is met.

Description

Technical Field

[0001] The invention relates to the technical field of sheet metal welding, in particular to a sheet metal welding positioning device. Background Art

[0002] In today's industrial manufacturing field, sheet metal welding is an extremely critical processing procedure, widely used in many industries such as machinery manufacturing, automobile production, and electronic equipment shell processing. With the continuous improvement of product refinement and the increasingly stringent market requirements for product quality and production efficiency, the accuracy and efficiency of sheet metal welding have become increasingly important.

[0003] Traditional sheet metal welding operations mostly rely on manual operation, and welders rely on experience and simple tools to complete the positioning and welding of weldments. In the positioning stage, simple clamps or pads are usually used to temporarily fix the sheet metal on the workbench. The accuracy of this fixing method is very limited. On the one hand, due to the lack of precise positioning assistance, it is difficult for workers to ensure that the relative position of the two sheet metal parts to be welded fully meets the welding requirements. Slight position deviations may cause weld size deviations and uneven welds after welding, seriously affecting the assembly performance and appearance quality of the product. On the other hand, manual operation is inefficient. Each adjustment of the weldment position and replacement of the clamp takes a lot of time, especially when facing mass production tasks, which greatly slows down the production progress. Moreover, long-term and high-intensity manual positioning work can easily make workers tired, further exacerbating the risk of operational errors and burying hidden dangers for product quality. Secondly, the position adjustment after the two welded sheet metal parts are bonded is likely to cause scratches on the surface of the sheet metal parts. Summary of the invention

[0004] In order to solve the deficiencies mentioned in the above-mentioned background technology, the purpose of the present invention is to provide a sheet metal welding positioning device. Through the cooperation of the first weldment support plate, the second weldment adjustment plate and the second weldment clamping assembly on the load-bearing plate, it can ensure that the relative position error of the two sheet metal parts before welding is controlled within an extremely small range, effectively avoiding quality problems such as dimensional tolerance and uneven welds, greatly improving the assembly performance and appearance quality of the product, and meeting the stringent requirements of the high-end manufacturing industry for precision sheet metal welding.

[0005] The purpose of the present invention can be achieved through the following technical solutions:

[0006] A sheet metal welding positioning device, comprising:

[0007] The supporting unit comprises a welding platform on which a first weldment supporting plate and a second weldment adjusting plate are symmetrically arranged;

[0008] A weldment transfer unit includes a mounting plate fixedly mounted on a welding platform, wherein two mounting plates are provided, the two mounting plates are symmetrically arranged, mounting shafts are symmetrically arranged on the mounting plates, a first steering support rod is rotatably connected to one mounting shaft, a second steering support rod is rotatably connected to the other mounting shaft, the first steering support rod and the second steering support rod are arranged parallel to each other, a load-bearing plate is arranged between the tops of a plurality of first steering support rods and the second steering support rods, the load-bearing plate is arranged horizontally, a plurality of mounting shafts are located in the same horizontal plane, and a second weldment clamping assembly is arranged on the load-bearing plate.

[0009] Further preferably, the interiors of the first steering support rod and the second steering support rod are both hollow structures, a first screw is provided through the top of the first steering support rod, a second screw is provided through the top of the second steering support rod, the first screw and the first steering support rod are threadedly connected, the second screw and the second steering support rod are threadedly connected, a first connecting box is sleeved on the top end of the first screw, the first screw and the first connecting box are rotatably connected, a second connecting box is provided between the two second screws, the end of the second screw extends to the interior of the second connecting box, the second screw and the second connecting box are rotatably connected, a connecting shaft is rotatably connected to the load-bearing plate, a connecting piece is fixedly connected to the first connecting box and the second connecting box, and the load-bearing plate is rotatably connected between the connecting shaft and the connecting piece.

[0010] Further preferably, a limiting groove is provided on the first steering support rod and the second steering support rod, the limiting groove is internally slidably connected to the limiting rod, the first connecting box is fixedly connected to the limiting rod on the first steering support rod, and the second connecting box is fixedly connected to the limiting rod on the second steering support rod.

[0011] Further preferably, a partition is fixedly connected to the interior of the second connecting box, and a first synchronization shaft is rotatably connected to the partition, first bevel gears are fixedly installed at both ends of the first synchronization shaft, and a second bevel gear is fixedly connected to the top end of the second screw, and the first bevel gear and the second bevel gear are meshingly connected.

[0012] Further preferably, a third bevel gear is fixedly connected to the top end of the first screw rod, a second synchronization shaft is arranged between the first connecting box and the second connecting box, a ball cage universal joint is arranged at the middle position of the second synchronization shaft, both ends of the second synchronization shaft extend to the interior of the first connecting box and the second connecting box respectively, a fourth bevel gear is fixedly connected to the end of the second synchronization shaft, the third bevel gear is meshingly connected to the fourth bevel gear located inside the first connecting box, and the second bevel gear is meshingly connected to the fourth bevel gear located inside the second connecting box.

[0013] Further preferably, a rotating motor is installed on the second connection box, the output end of the rotating motor extends to the inside of the second connection box, a fifth bevel gear is fixedly installed on the output end of the rotating motor, and the fifth bevel gear is meshingly connected with the second bevel gear.

[0014] Further preferably, the second weldment clamping assembly includes a first hydraulic rod installed on the load-bearing plate, the output end of the first hydraulic rod is fixedly connected to a lifting platform, a telescopic guide rod is installed on the top of the lifting platform, and the top end of the telescopic guide rod is fixedly connected to the load-bearing plate.

[0015] Further preferably, a plurality of slide grooves are fixedly connected to the load-bearing plate, a fixture base is slidably connected inside the slide grooves, and fixing screws are threadedly connected to the fixture base, and the fixing screws are used to install and fix the fixture base.

[0016] Further preferably, a second hydraulic rod is fixedly installed inside the clamp base, the output end of the second hydraulic rod passes through the clamp base and is fixedly connected to a push-pull block, a push rod is symmetrically rotatably connected to the clamp base, one end of the push rod away from the clamp base is rotatably connected to an L-shaped clamp arm, and the turning point of the L-shaped clamp arm is rotatably connected to the push-pull block.

[0017] Beneficial effects of the present invention:

[0018] 1. The present invention can ensure that the relative position error of the two sheet metal parts before welding is controlled within a very small range through the cooperation of the first weldment support plate, the second weldment adjustment plate and the second weldment clamping assembly on the load-bearing plate, effectively avoiding quality problems such as dimensional over-tolerance and uneven welds, greatly improving the assembly performance and appearance quality of the product, and meeting the stringent requirements of high-end manufacturing industry for precision sheet metal welding;

[0019] 2. Compared with traditional manual operation, the present invention reduces the requirements for workers' operating proficiency, and also reduces the labor intensity of workers, greatly shortens the positioning time of a single weldment, and has more significant advantages in mass production. It can quickly respond to market demand, improve enterprise production capacity, reduce labor costs, and create greater economic benefits for the enterprise. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below in conjunction with the accompanying drawings.

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the weldment transfer unit in the present invention;

[0023] Figure 3 It is a schematic diagram of the structure of the fourth bevel gear and the second bevel gear in the present invention;

[0024] Figure 4 is a cross-sectional view of the second connection box structure in the present invention;

[0025] Figure 5 This is a schematic diagram of the structure of the second synchronous shaft and the second screw in the present invention;

[0026] Figure 6 It is a cross-sectional view of the structure of the first steering support rod and the second steering support rod in the present invention;

[0027] Figure 7 It is a schematic diagram of the structure of the second weldment clamping assembly in the present invention;

[0028] Figure 8 It is a schematic diagram of the internal structure of the clamp base in the present invention.

[0029] In the figure:

[0030] 100, support unit; 101, welding platform; 102, first weldment support plate; 103, second weldment adjustment plate;

[0031] 200, weldment transfer unit; 201, mounting plate; 202, mounting shaft; 203, first steering support rod; 204, second steering support rod; 205, load-bearing plate; 206, first screw rod; 207, second screw rod; 208, first connection box; 209, second connection box; 210, connection shaft; 211, connection piece; 212, limit groove; 213, limit rod; 214, partition; 215, first synchronization shaft; 216, first bevel gear; 217, second bevel gear; 218, third bevel gear; 219, second synchronization shaft; 220, ball cage universal coupling; 221, fourth bevel gear; 222, rotating motor; 223, fifth bevel gear;

[0032] 300, second weldment clamping assembly; 301, first hydraulic rod; 302, lifting platform; 303, telescopic guide rod; 304, slide groove; 305, clamp base; 306, fixing screw; 307, second hydraulic rod; 308, push-pull block; 309, push rod; 310, L-shaped clamp arm. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] like Figure 1-8 As shown, a sheet metal welding positioning device comprises:

[0036] The supporting unit 100 includes a welding platform 101 , on which a first weldment supporting plate 102 and a second weldment adjusting plate 103 are symmetrically arranged.

[0037] The weldment transfer unit 200 includes a mounting plate 201 fixedly mounted on the welding platform 101, wherein two mounting plates 201 are provided, and the two mounting plates 201 are symmetrically arranged, and mounting shafts 202 are symmetrically installed on the mounting plates 201, and a first steering support rod 203 is rotatably connected to one of the mounting shafts 202, and a second steering support rod 204 is rotatably connected to the other mounting shaft 202, and the first steering support rod 203 and the second steering support rod 204 are arranged parallel to each other, and a load-bearing plate 205 is arranged between the tops of the plurality of first steering support rods 203 and the second steering support rods 204, and the load-bearing plate 205 is arranged horizontally, and the plurality of mounting shafts 202 are located in the same horizontal plane, and a second weldment clamping assembly 300 is arranged on the load-bearing plate 205.

[0038] The interiors of the first steering support rod 203 and the second steering support rod 204 are both hollow structures. A first screw 206 is provided through the top of the first steering support rod 203, and a second screw 207 is provided through the top of the second steering support rod 204. The first screw 206 is threadedly connected to the first steering support rod 203, and the second screw 207 is threadedly connected to the second steering support rod 204. A first connecting box 208 is sleeved on the top of the first screw 206, and the first screw 206 and the first connecting box 208 are rotatably connected. A second connecting box 209 is provided between the two second screws 207, and the end of the second screw 207 extends to the inside of the second connecting box 209, and the second screw 207 and the second connecting box 209 are rotatably connected. A connecting shaft 210 is rotatably connected to the load-bearing plate 205, and a connecting piece 211 is fixedly connected to the first connecting box 208 and the second connecting box 209, and the load-bearing plate 205 is rotatably connected through the connecting shaft 210 and the connecting piece 211.

[0039] The first steering support rod 203 and the second steering support rod 204 are both provided with a limiting groove 212, and the internal sliding connection of the limiting groove 212 is connected to the limiting rod 213, the first connecting box 208 is fixedly connected to the limiting rod 213 on the first steering support rod 203, and the second connecting box 209 is fixedly connected to the limiting rod 213 on the second steering support rod 204, ensuring that the first connecting box 208 and the second connecting box 209 are not offset during the lifting process, thereby further improving the lifting stability of the load-bearing plate 205.

[0040] A partition plate 214 is fixedly connected to the interior of the second connecting box 209, and a first synchronization shaft 215 is rotatably connected to the partition plate 214. First bevel gears 216 are fixedly installed at both ends of the first synchronization shaft 215. A second bevel gear 217 is fixedly connected to the top end of the second screw rod 207. The first bevel gear 216 and the second bevel gear 217 are meshingly connected.

[0041] A third bevel gear 218 is fixedly connected to the top end of the first screw rod 206, a second synchronization shaft 219 is arranged between the first connection box 208 and the second connection box 209, a ball cage universal joint 220 is arranged in the middle position of the second synchronization shaft 219, both ends of the second synchronization shaft 219 extend to the interior of the first connection box 208 and the second connection box 209 respectively, a fourth bevel gear 221 is fixedly connected to the end of the second synchronization shaft 219, the third bevel gear 218 is meshingly connected with the fourth bevel gear 221 located in the first connection box 208, and the second bevel gear 217 is meshingly connected with the fourth bevel gear 221 located in the second connection box 209.

[0042] A rotating motor 222 is installed on the second connection box 209 , and an output end of the rotating motor 222 extends into the interior of the second connection box 209 . A fifth bevel gear 223 is fixedly installed on the output end of the rotating motor 222 , and the fifth bevel gear 223 is meshedly connected with the second bevel gear 217 .

[0043] The second weldment clamping assembly 300 includes a first hydraulic rod 301 installed on the bearing plate 205, the output end of the first hydraulic rod 301 is fixedly connected to a lifting platform 302, a telescopic guide rod 303 is installed on the top of the lifting platform 302, and the top end of the telescopic guide rod 303 is fixedly connected to the bearing plate 205. The first hydraulic rod 301 can drive the lifting platform 302 to move up and down, and the telescopic guide rod 303 provides guidance for the lifting platform 302 to ensure the stability of its lifting process and meet the need for fine-tuning the height of the weldment during welding.

[0044] The load-bearing plate 205 is fixedly connected with a plurality of slide grooves 304, the interior of the slide grooves 304 is slidably connected with a fixture base 305, the fixture base 305 is threadedly connected with a fixing screw 306, and the fixing screw 306 is used to install and fix the fixture base 305. The fixture base 305 can be flexibly slidably adjusted in the slide grooves 304 according to the shape, size and welding position requirements of the sheet metal to be welded, and is fixed by the fixing screw 306 to achieve adaptive clamping of different weldments.

[0045] A second hydraulic rod 307 is fixedly installed inside the clamp base 305. The output end of the second hydraulic rod 307 passes through the clamp base 305 and is fixedly connected to a push-pull block 308. A push rod 309 is symmetrically rotatably connected to the clamp base 305. The end of the push rod 309 away from the clamp base 305 is rotatably connected to an L-shaped clamp arm 310. The turning point of the L-shaped clamp arm 310 is rotatably connected to the push-pull block 308. When the second hydraulic rod 307 is working, the push-pull block 308 and the push rod 309 drive the L-shaped clamp arm to tighten or loosen, thereby achieving reliable clamping of the second weldment and ensuring that the weldment is stable and motionless during the transfer and welding process.

[0046] Working principle:

[0047] Before officially starting the welding production task, the operator fine-tunes the equipment according to the size, shape, material and other characteristics of the sheet metal to be welded. First, by adjusting the fine-tuning mechanism of the second weldment adjustment plate 103, the clamp base 305 slides in the slide groove 304, and adjusts it according to the preset second weldment welding position and angle, and then fixes the clamp base 305 with the fixing screws 306.

[0048] Next, the rotating motor 222 is started, and the rotating motor 222 drives the fifth bevel gear 223 to rotate, and the fifth bevel gear 223 drives the second bevel gear 217 meshing therewith to rotate, and through the first bevel gears 216 at both ends of the first synchronization shaft 215, the two second screws 207 are driven to rotate. Since the second synchronization shaft 219 is provided between the first connection box 208 and the second connection box 209, the second bevel gear 217 drives the second synchronization shaft 219 through the fourth bevel gear 221, and then drives the third bevel gear 218 to rotate, and the first screw 206 also rotates synchronously. Under the action of the threaded transmission, the first screw 206 and the second screw 207 are respectively lifted and lowered in the first steering support rod 203 and the second steering support rod 204, driving the first connection box 208 and the second connection box 209 to move up and down, thereby adjusting the height of the bearing plate 205 to match the height of the first weldment, facilitating the subsequent transfer of the weldment, and the height of the bearing plate 205 is positively correlated with the transfer distance of the second weldment.

[0049] When welding is officially carried out, the first sheet metal is placed on the first weldment support plate 102, and the position of the weldment is initially fixed by using the positioning pins and positioning grooves (common basic positioning structures, not shown in detail in this application) on its surface. Then the second weldment is placed on the second weldment adjustment plate 103, and the angle and position of the second weldment are adjusted according to the preset welding position and angle, and the spacing between the preset welding position and the nearest installation axis 202 is the same as the spacing between the second weldment and the nearest installation axis 202. The angle adjustment process is carried out on the second weldment adjustment plate 103 to avoid scratches on the surface of the sheet metal caused by hard movement.

[0050] Subsequently, the first steering support rod 203 and the second steering support rod 204 are rotated to move the second weldment clamping assembly 300 to the second weldment, and the second hydraulic rod 307 is started. The output end of the second hydraulic rod 307 retracts, pushing the push-pull block 308 to move. The push-pull block 308 drives the push rod 309 to rotate, thereby tightening the L-shaped clamp arm to firmly clamp the second weldment to ensure that it does not move during the transfer and welding process.

[0051] Then reverse the second steering support rod 204 again. During the rotation, the load-bearing plate 205 is in a horizontal state, thereby maintaining a stable angle of the second weldment. The first hydraulic rod 301 can fine-tune the height of the lifting platform 302 and the second weldment according to the welding process requirements to ensure that the joint of the two weldments is in the best welding position.

[0052] After the welder is ready, he starts the welding equipment and accurately welds the two sheet metal parts along the pre-designed weld path.

[0053] After welding is completed, the output end of the second hydraulic rod 307 retracts, the clamping of the weldment is released, and the welded workpiece is taken out. The subsequent sheet metal parts repeat the above process in sequence, and this cycle is repeated to achieve efficient and accurate sheet metal welding.

[0054] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0055] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A sheet metal welding positioning device, characterized in that: include: A support unit (100) comprising a welding platform (101), wherein a first weldment support plate (102) and a second weldment adjustment plate (103) are symmetrically arranged on the welding platform (101); A weldment transfer unit (200) comprises a mounting plate (201) fixedly mounted on a welding platform (101), wherein two mounting plates (201) are provided, and the two mounting plates (201) are symmetrically arranged, and the mounting plates (201) are located in the middle of a first weldment support plate (102) and a second weldment adjustment plate (103), and mounting shafts (202) are symmetrically mounted on the mounting plates (201), and a first steering support rod (203) is rotatably connected to one of the mounting shafts (202), and the other mounting shaft (202) is rotatably connected to the first steering support rod (203). A second steering support rod (204) is rotatably connected to each of the mounting shafts (202); the first steering support rod (203) and the second steering support rod (204) are arranged parallel to each other; a load-bearing plate (205) is arranged between the tops of the plurality of first steering support rods (203) and the second steering support rod (204); the load-bearing plate (205) is arranged horizontally; the plurality of mounting shafts (202) are located on the same horizontal plane; and a second weldment clamping assembly (300) is arranged on the load-bearing plate (205).

2. The sheet metal welding positioning device according to claim 1, characterized in that: The interiors of the first steering support rod (203) and the second steering support rod (204) are both hollow structures. A first screw rod (206) is provided through the top of the first steering support rod (203), and a second screw rod (207) is provided through the top of the second steering support rod (204). The first screw rod (206) and the first steering support rod (203) are threadedly connected, and the second screw rod (207) and the second steering support rod (204) are threadedly connected. A first connecting box (208) is sleeved on the top of the first screw rod (206). The first screw rod (206) and the second screw rod (207) are threadedly connected. A connecting box (208) is rotatably connected between the two second screw rods (207), a second connecting box (209) is arranged between the two second screw rods (207), the end of the second screw rod (207) extends into the interior of the second connecting box (209), the second screw rod (207) and the second connecting box (209) are rotatably connected, a connecting shaft (210) is rotatably connected to the load-bearing plate (205), the first connecting box (208) and the second connecting box (209) are fixedly connected with a connecting piece (211), and the load-bearing plate (205) is rotatably connected to the connecting piece (211) via the connecting shaft (210).

3. The sheet metal welding positioning device according to claim 2, characterized in that: The first steering support rod (203) and the second steering support rod (204) are both provided with a limiting groove (212), the limiting groove (212) is internally slidably connected to the limiting rod (213), the first connecting box (208) is fixedly connected to the limiting rod (213) on the first steering support rod (203), and the second connecting box (209) is fixedly connected to the limiting rod (213) on the second steering support rod (204).

4. The sheet metal welding positioning device according to claim 3, characterized in that: A partition (214) is fixedly connected inside the second connection box (209), and a first synchronization shaft (215) is rotatably connected to the partition (214). First bevel gears (216) are fixedly installed at both ends of the first synchronization shaft (215), and a second bevel gear (217) is fixedly connected to the top end of the second screw rod (207), and the first bevel gear (216) and the second bevel gear (217) are meshingly connected.

5. The sheet metal welding positioning device according to claim 4, characterized in that: A third bevel gear (218) is fixedly connected to the top end of the first screw rod (206); a second synchronization shaft (219) is arranged between the first connection box (208) and the second connection box (209); a ball cage universal joint (220) is arranged at the middle position of the second synchronization shaft (219); two ends of the second synchronization shaft (219) extend to the inside of the first connection box (208) and the second connection box (209) respectively; a fourth bevel gear (221) is fixedly connected to the end of the second synchronization shaft (219); the third bevel gear (218) is meshingly connected to the fourth bevel gear (221) located inside the first connection box (208); and the second bevel gear (217) is meshingly connected to the fourth bevel gear (221) located inside the second connection box (209).

6. The sheet metal welding positioning device according to claim 5, characterized in that: A rotating motor (222) is installed on the second connection box (209), and the output end of the rotating motor (222) extends to the interior of the second connection box (209). A fifth bevel gear (223) is fixedly installed on the output end of the rotating motor (222), and the fifth bevel gear (223) is meshingly connected with the second bevel gear (217).

7. The sheet metal welding positioning device according to claim 6, characterized in that: The second weldment clamping assembly (300) comprises a first hydraulic rod (301) mounted on a load-bearing plate (205); the output end of the first hydraulic rod (301) is fixedly connected to a lifting platform (302); a telescopic guide rod (303) is mounted on the top of the lifting platform (302); and the top end of the telescopic guide rod (303) is fixedly connected to the load-bearing plate (205).

8. The sheet metal welding positioning device according to claim 7, characterized in that: A plurality of slide grooves (304) are fixedly connected to the load-bearing plate (205), a clamp base (305) is slidably connected inside the slide grooves (304), a fixing screw (306) is threadedly connected to the clamp base (305), and the fixing screw (306) is used to install and fix the clamp base (305).

9. The sheet metal welding positioning device according to claim 8, characterized in that: A second hydraulic rod (307) is fixedly installed inside the clamp base (305), and the output end of the second hydraulic rod (307) passes through the clamp base (305) and is fixedly connected to a push-pull block (308). A push rod (309) is symmetrically rotatably connected to the clamp base (305), and one end of the push rod (309) away from the clamp base (305) is rotatably connected to an L-shaped clamp arm (310), and the turning point of the L-shaped clamp arm (310) is rotatably connected to the push-pull block (308).

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