A welding fixture for coupling production

Abstract

The present invention relates to the field of welding positioning technology, and in particular to a welding fixture for coupling production, comprising: a base motor, a clamping frame, an adjusting device installed between the base motor and the clamping frame, and a clamping assembly arranged between the clamping frames, wherein a clamping space is provided in the middle of the clamping frame, and four sliding openings are provided in an annular shape, and the clamping assembly is arranged inside the sliding opening, and the clamping assembly includes four clamping blocks, and the four clamping blocks are slidably arranged inside the four sliding openings; the upper surface of the clamping frame is provided with four strip grooves in an annular shape, and a heat dissipation assembly is provided on the upper side of the strip grooves, and the heat dissipation assembly includes a ring tube, four limiting tubes, four sliding tubes and a connecting tube, and the ring tube is provided inside the clamping frame, and the four limiting tubes are slidably arranged in the four strip grooves by telescopic parts. The present invention can be adjusted according to the size of the welded coupling, thereby ensuring the cooling and heat dissipation effect of the welding position.

Description

Technical Field

[0001] The invention relates to the technical field of welding positioning, and in particular to a welding fixture for producing couplings. Background Art

[0002] A coupling is a device that connects two shafts or a shaft and a rotating part. They rotate together during the transmission of motion and power and do not disengage under normal circumstances. It is sometimes also used as a safety device to prevent the connected parts from being subjected to excessive loads and play an overload protection role. During the production process of the coupling, the shaft and the connecting parts need to be combined and welded.

[0003] Patent publication number CN106607663A discloses a coupling fork welding tool, comprising: a fork shaft and a tapered shank, a through hole provided in the middle of the fork shaft, one end of the tapered shank inserted into the through hole, and a half-coupling device provided at the other end, a first steel pipe and a second steel pipe connected on both sides of the fork shaft, a first cover plate and a second cover plate provided at the other ends of the first and second steel pipes, a first baffle provided on the outside of the first cover plate, a second baffle provided on the outside of the second cover plate, and the first baffle and the first, second, and second cover plates fixedly connected by bolts. The above tool facilitates the welding of the fork shaft and the tapered shank, improves welding accuracy and quality, and ensures a tight connection between the fork shaft and the steel pipe by providing a step structure between the fork shaft and the steel pipe.

[0004] However, during the welding process, due to the small size of the coupling components, heat is easily accumulated around the welding position. The local high temperature causes the coupling connector or keyway to deform, affecting subsequent assembly. Summary of the Invention

[0005] The purpose of the present invention is to solve the shortcomings of the prior art that heat accumulation around the welding position is easily caused, local high temperature causes deformation of the coupling's connecting parts or keyways, and affects subsequent assembly, and to propose a welding fixture for coupling production.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A welding fixture for coupling production, comprising: a base motor, a clamping frame, an adjustment device installed between the base motor and the clamping frame, and a clamping assembly arranged between the clamping frames, wherein the clamping frame is provided with a clamping space in the middle and has four sliding openings in an annular shape, the clamping assembly is arranged inside the sliding openings, and the clamping assembly includes four clamping blocks, and the four clamping blocks are slidably arranged inside the four sliding openings;

[0008] The upper surface of the clamping frame is provided with four strip grooves in a ring shape, and a heat dissipation component is provided on the upper side of the strip groove. The heat dissipation component includes a ring tube, four limiting tubes, four sliding tubes and a connecting tube. The ring tube is arranged inside the clamping frame, and the four limiting tubes are respectively slidably arranged inside the four strip grooves through telescopic parts. The two ends of the sliding tube are respectively sealed and slidably arranged inside two adjacent limiting tubes. The four limiting tubes and the four sliding tubes form a heat dissipation ring, and the connecting tube is fixedly connected between the ring tube and the limiting tube.

[0009] Preferably, the clamping assembly further comprises four clamping pieces, which are respectively fixedly connected to one end of the four clamping blocks close to the middle of the clamping space, and the clamping pieces are arc-shaped pieces, and the four clamping pieces form a clamping ring.

[0010] Preferably, the telescopic member includes a slider and a telescopic tube, the slider is limitedly slidably arranged inside the strip groove, one end of the telescopic tube is communicated with the ring tube, and the other end is fixedly connected to the side of the slider.

[0011] Preferably, the adjustment device includes a rotating disk and four limit rods. The rotating disk is arranged at the output end of the base motor, and four adjustment openings are opened on the rotating disk. The four limit rods are respectively fixedly connected to the bottom of the clamping block and are clamped inside the adjustment openings.

[0012] Preferably, a limiting assembly is provided on the upper side of each of the four limiting tubes, and the four limiting assemblies are used to limit the welding parts.

[0013] Preferably, the limiting assembly includes two telescopic rods and a limiting block, the two telescopic rods are fixedly connected to the upper surface of the limiting tube, the limiting block is vertically fixedly connected to one end of the telescopic rod away from the limiting tube, and the limiting block is an arc-shaped block.

[0014] Preferably, a plurality of mounting openings are provided on the upper side of the clamping block, cooling openings are provided on the sides of the mounting openings, and cooling components are provided inside the mounting openings for cooling the upper end of the shaft.

[0015] Preferably, the cooling assembly includes multiple cooling tubes, connecting tubes, elastic tubes and fins, the multiple cooling tubes are respectively arranged inside multiple mounting ports, the connecting tubes are inverted U-shape, the two ends of the multiple cooling tubes are respectively connected to the two sides of the connecting tube, the elastic tube is connected between the connecting tube and the ring tube, and the multiple fins are fixedly connected to the inside of the connecting tube.

[0016] Preferably, the limiting tube and the sliding tube are both flat tubes, and the sliding tube is made of an elastic material; the upper end of the connecting tube is arc-shaped and is made of an elastic material.

[0017] Preferably, an adjustment base is provided in the middle of the clamping frame, and the adjustment base is used to drive the shaft rod to move up and down. The adjustment base includes a telescopic column and four telescopic arms. The telescopic column is vertically fixedly connected to the middle of the clamping frame, and the four telescopic arms are annularly fixedly connected to the side of the upper end of the telescopic column.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. During welding, according to the diameter of the shaft, the limiting tube will slide under the drive of the telescopic member, so that the two ends of the sliding tube slide inside the limiting tube, changing the diameter of the heat dissipation ring, and ensuring that the heat dissipation ring moves below the welding position. During welding, the coolant inside the ring tube is introduced into the heat dissipation ring through the connecting tube, thereby uniformly dissipating heat at the welding position, avoiding excessively high local temperature of the welded part and deformation of the welded part. The present invention can be adjusted according to the size of the welded coupling, thereby ensuring the cooling and heat dissipation effect of the welding position and avoiding deformation of the welding position.

[0020] 2. By setting up multiple clamping rings that can form an annular shape, the shaft is rigidly clamped from the outside to prevent the shaft from deformation, thereby ensuring that the entire coupling will not have welding deviation and ensuring the use of the coupling;

[0021] 3. The cooling liquid will be introduced into the interior of the telescopic tube, causing the tube to expand and extend, pushing the slider toward the middle of the clamping frame, thereby driving the cooling ring above the slider to shrink toward the middle. It will automatically adapt and adjust according to the diameter of the shaft welded in the middle, ensuring heat dissipation at the welding position. There is no need to manually adjust the position of the cooling ring before welding. After the coolant is introduced, it will automatically adapt and adjust, thereby effectively dissipating heat for welding shafts of different diameters.

[0022] 4. The base motor drives the rotating disk to rotate, so that the limit rod slides inside the adjustment port. This method can quickly adjust the position of multiple clamping blocks synchronously, thereby improving the rapid clamping and removal of shafts of different diameters;

[0023] 5. During the movement of the heat dissipation ring, the limit block will contact the side of the connector. As the heat dissipation ring moves, the telescopic rod will stretch and retract, thereby applying multiple forces of the same size and pointing to the center of the circle to the placed connector through the limit blocks on multiple sides, completing the position limit of the connector, avoiding the center deviation caused during the welding process, and ensuring the adaptability of the coupling after welding;

[0024] 6. The coolant is introduced into the cooling ring through the ring pipe, and the cooling pipe can cool the position of the shaft. At the same time, the connecting pipe is exposed to the outside of the clamping block, which can absorb heat and cool the air around the clamping position to ensure the overall temperature of the position below the welding. At the same time, a coolant outlet pipe is set below the connecting pipe to discharge the heat exchange coolant to ensure the cooling and heat dissipation effect during long-term welding.

[0025] 7. A sensor is installed inside the telescopic arm. When the clamping block moves inward and clamps the shaft, the telescopic arm will be compressed. When the clamping block clamps to the outside of the shaft, the length of the telescopic arm does not change. The sensor inside the telescopic arm sends a static signal to the base motor to prevent the clamping block from continuing to move inward, causing excessive clamping force on the shaft, thereby causing deformation of the clamping part of the shaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a front structural schematic diagram of a welding fixture for coupling production proposed by the present invention;

[0027] Figure 2 This is a schematic diagram of the bottom structure of a welding fixture for coupling production proposed by the present invention;

[0028] Figure 3 This is a schematic diagram of the top view of a welding fixture for coupling production proposed by the present invention;

[0029] Figure 4 This is a schematic cross-sectional view of a welding fixture for coupling production proposed by the present invention;

[0030] Figure 5 This is a schematic structural diagram of a heat dissipation assembly of a welding fixture for coupling production proposed by the present invention;

[0031] Figure 6 This is a schematic structural diagram of a limit assembly of a welding fixture for coupling production proposed by the present invention;

[0032] Figure 7 This is a schematic structural diagram of a cooling assembly of a welding fixture for coupling production proposed by the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of an adjustment base of a welding fixture for coupling production proposed by the present invention.

[0034] In the figure: 1. Base motor; 2. Clamping frame; 3. Adjusting device; 31. Rotating disk; 32. Limiting rod; 4. Clamping assembly; 41. Clamping block; 42. Clamping plate; 5. Heat dissipation assembly; 51. Ring tube; 52. Limiting tube; 53. Sliding tube; 54. Connecting tube; 6. Telescopic member; 61. Slider; 62. Telescopic tube; 7. Limiting assembly; 71. Telescopic rod; 72. Limiting block; 8. Cooling assembly; 81. Cooling tube; 82. Connecting tube; 83. Elastic tube; 84. Fin; 9. Adjusting base; 91. Telescopic column; 92. Telescopic arm. DETAILED DESCRIPTION

[0035] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0036] The terms "upper", "lower", "left", "right", "middle" and "one" used in the present invention are only for the convenience of description and are not intended to limit the scope of the present invention. Changes or adjustments to their relative relationships should be regarded as within the scope of the present invention without substantially changing the technical content.

[0037] Reference Figures 1-8 A welding fixture for coupling production includes: a base motor 1, a clamping frame 2, an adjustment device 3 installed between the base motor 1 and the clamping frame 2, and a clamping assembly 4 arranged between the clamping frames 2. The clamping frame 2 is provided with a clamping space in the middle and has four sliding openings in an annular shape. The clamping assembly 4 is arranged inside the sliding openings. The clamping assembly 4 includes four clamping blocks 41. The four clamping blocks 41 are slidably arranged inside the four sliding openings.

[0038] The upper surface of the clamping frame 2 is provided with four strip grooves in an annular shape, and a heat dissipation assembly 5 is provided on the upper side of the strip grooves. The heat dissipation assembly 5 includes a ring tube 51, four limiting tubes 52, four sliding tubes 53 and a connecting tube 54. The ring tube 51 is arranged inside the clamping frame 2, and the four limiting tubes 52 are respectively slidably arranged inside the four strip grooves through the telescopic parts 6. The two ends of the sliding tube 53 are respectively sealed and slidably arranged inside two adjacent limiting tubes 52. The four limiting tubes 52 and the four sliding tubes 53 form a heat dissipation ring, and the connecting tube 54 is fixedly connected between the ring tube 51 and the limiting tube 52.

[0039] In an embodiment of the above technical solution, the shaft rod to be welded is placed inside the clamping assembly 4, and the connecting part to be welded is placed above the heat dissipation assembly 5. At the same time, the position where the connecting part needs to be welded is aligned with the position where the shaft rod needs to be welded. During welding, according to the diameter of the shaft rod, the limiting tube 52 will slide under the drive of the telescopic part 6, so that the two ends of the sliding tube 53 slide inside the limiting tube 52, changing the diameter of the heat dissipation ring, and ensuring that the heat dissipation ring moves to the bottom of the welding position. During welding, the coolant inside the ring tube 51 is introduced into the heat dissipation ring through the connecting tube 54, so as to evenly dissipate heat at the welding position, avoiding causing the local temperature of the welded part to be too high and causing deformation of the welded part.

[0040] The present invention can be adjusted according to the size of the welded coupling, thereby ensuring the cooling and heat dissipation effect on the welding position and avoiding deformation of the welding position.

[0041] The preferred technical solution in this embodiment is:

[0042] Reference Figure 2 and Figure 3 The clamping assembly 4 also includes four clamping pieces 42, which are respectively fixedly connected to one end of the four clamping blocks 41 close to the middle of the clamping space. The clamping piece 42 is an arc-shaped piece, and the four clamping pieces 42 form a clamping ring.

[0043] During the welding process of the coupling, the temperature at the welding position will diffuse to the side close to the weld. Due to the increase in local temperature, the shaft at the clamping position will be deformed. By setting up multiple clamping rings that can form a ring, the shaft is rigidly clamped from the outside to avoid deformation of the shaft, thereby ensuring that the coupling as a whole will not have welding deviation and ensuring the use of the coupling.

[0044] Reference Figure 3 and Figure 6 The annular tube 51 passes through the strip groove, and the telescopic member 6 includes a slider 61 and a telescopic tube 62. The slider 61 is limitedly slidably arranged inside the strip groove. One end of the telescopic tube 62 is connected to the annular tube 51, and the other end is fixedly connected to the side of the slider 61.

[0045] Since the diameters of different shafts are different, different locations require heat dissipation and cooling during welding. In order to ensure the absorption of heat diffused outward from the welding location, the diameter of the heat dissipation ring needs to be adjusted according to the size of the shaft.

[0046] Before welding, after the heat dissipation liquid is introduced into the interior of the ring tube 51, the heat dissipation liquid will be introduced into the interior of the telescopic tube 62, thereby causing the telescopic tube 62 to expand and extend, pushing the slider 61 toward the middle of the clamping frame 2, thereby driving the heat dissipation ring above the slider 61 to retract toward the middle, and automatically adapting and adjusting according to the diameter of the shaft rod welded in the middle, and setting the heat dissipation ring below the welding position to ensure heat dissipation of the welding position.

[0047] There is no need to manually adjust the position of the heat dissipation ring before welding. After the coolant is introduced, it will automatically adapt and adjust, thereby effectively dissipating heat when welding shafts of different diameters.

[0048] Reference Figure 2 The adjusting device 3 includes a rotating disk 31 and four limiting rods 32. The rotating disk 31 is arranged at the output end of the base motor 1, and four adjusting ports are opened on the rotating disk 31. The four limiting rods 32 are respectively fixedly connected to the bottom of the clamping block 41 and are clamped inside the adjusting ports.

[0049] The base motor 1 drives the rotating disk 31 to rotate, so that the limit rod 32 slides inside the adjustment mouth. Since the position of the clamping frame 2 above is fixed, the limit rod 32 drives the clamping block 41 to slide inside the sliding mouth, thereby clamping and limiting shafts of different diameters. This method can quickly and synchronously adjust the positions of multiple clamping blocks 41, thereby improving the rapid clamping and disassembly of shafts of different diameters.

[0050] Reference Figure 7 , the upper sides of the four limiting tubes 52 are each provided with a limiting assembly 7, and the four limiting assemblies 7 are used to limit the position of the connecting piece;

[0051] The limiting assembly 7 includes two telescopic rods 71 ​​and a limiting block 72. The two telescopic rods 71 ​​are fixedly connected to the upper surface of the limiting tube 52. The limiting block 72 is vertically fixedly connected to one end of the telescopic rod 71 away from the limiting tube 52. The limiting block 72 is an arc-shaped block.

[0052] Since different connectors have different sizes, if the connection position is not restricted during the welding process, the centers of the connector and the shaft rod will not coincide during the welding process, resulting in different welding position gaps, which will cause the connection of the coupling components to be offset, affecting the use of the overall assembly of the coupling. Therefore, before welding, the position of the connector needs to be restricted so that the center of the connector and the center of the shaft rod coincide to ensure the consistency of the welding width.

[0053] Before welding, the connector is placed above the heat dissipation ring, and heat dissipation liquid is introduced into the telescopic tube 62 to expand the telescopic tube 62, and the heat dissipation ring is moved to the welding position. During the movement of the heat dissipation ring, the limit block 72 will contact the side of the connector. As the heat dissipation ring moves, the telescopic rod 71 is stretched and retracted, thereby applying multiple forces of the same size and pointing to the center of the circle to the placed connector through the limit blocks 72 on multiple sides, completing the position limitation of the connector, avoiding the center offset caused during the welding process, and ensuring the adaptability of the coupling after welding.

[0054] Reference Figure 7 , the upper side of the clamping block 41 is provided with a plurality of mounting openings, the side of the mounting opening is provided with a cooling opening, and a cooling component 8 is provided inside the mounting opening, and the cooling component 8 is used for cooling the upper end of the shaft;

[0055] The cooling assembly 8 includes a plurality of cooling tubes 81, a connecting tube 82, an elastic tube 83, and fins 84. The plurality of cooling tubes 81 are respectively arranged inside the plurality of mounting openings. The connecting tube 82 is in an inverted U shape. The ends of the plurality of cooling tubes 81 are respectively connected to the two sides of the connecting tube 82. The elastic tube 83 is connected between the connecting tube 82 and the ring tube 51. The plurality of fins 84 are fixedly connected to the inner side of the connecting tube 82.

[0056] The limiting tube 52 and the sliding tube 53 are both flat tubes, and the sliding tube 53 is made of elastic material. The upper end of the connecting tube 82 is arc-shaped and is also made of elastic material.

[0057] During the welding process, not only the connecting parts are affected by high temperature, but also the shaft is affected by the welding heat. In order to avoid the heat deformation of the welding end of the shaft, the shaft also needs to be cooled and dissipated.

[0058] Since the heat of the shaft is mostly accumulated at the welding end during the welding process, multiple cooling pipes 81 are set near the welding position, and the coolant is introduced into the cooling ring through the ring pipe 51. The cooling pipe 81 can cool and dissipate heat at the position of the shaft. At the same time, the connecting pipe 82 is exposed to the outside of the clamping block 41, and can absorb heat and cool the air around the clamping position to ensure the overall temperature of the position below the welding. At the same time, a coolant outlet pipe is set below the connecting pipe 82 to discharge the heat exchange coolant to ensure the cooling and heat dissipation effect during long-term welding.

[0059] The upper heat dissipation assembly 5 and the lower cooling assembly 8 are used to cool the connector and the shaft simultaneously, thereby improving the cooling efficiency while ensuring the cooling effect.

[0060] Reference Figure 8An adjustment base 9 is provided in the middle of the clamping frame 2, and the adjustment base 9 is used to drive the shaft to move up and down. The adjustment base 9 includes a telescopic column 91 and four telescopic arms 92. The telescopic column 91 is vertically fixedly connected to the middle of the clamping frame 2, and the four telescopic arms 92 are annularly fixedly connected to the upper side of the telescopic column 91.

[0061] Due to the different lengths and diameters of different shafts, in the process of placing the shaft, in order to prevent the shorter shaft from falling to the bottom of the clamping space, or when the connecting part needs to be welded to the middle of the shaft, etc., the position of the shaft needs to be adjusted. The adjustment base 9 can complete the adjustment of the shaft position according to the needs of use.

[0062] At the same time, a sensor is set inside the telescopic arm 92. When the clamping block 41 moves inward and clamps the shaft, the telescopic arm 92 will be compressed. When the clamping block 41 clamps to the outside of the shaft, the length of the telescopic arm 92 does not change. The sensor inside the telescopic arm 92 sends a static signal to the base motor 1, thereby preventing the clamping block 41 from continuing to move inward, causing excessive clamping force on the shaft, and causing deformation of the clamping part of the shaft.

[0063] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A welding fixture for coupling production, comprising: A base motor (1), a clamping frame (2), an adjusting device (3) installed between the base motor (1) and the clamping frame (2), and a clamping assembly (4) arranged between the clamping frames (2), characterized in that a clamping space is provided in the middle of the clamping frame (2), and four sliding openings are opened in an annular shape, the clamping assembly (4) is arranged inside the sliding opening, and the clamping assembly (4) includes four clamping blocks (41), and the four clamping blocks (41) are slidably arranged inside the four sliding openings; The upper surface of the clamping frame (2) is provided with four strip grooves in an annular shape, and a heat dissipation assembly (5) is provided on the upper side of the strip groove. The heat dissipation assembly (5) includes a ring tube (51), four limit tubes (52), four sliding tubes (53) and a connecting tube (54). The ring tube (51) is provided inside the clamping frame (2), and the four limit tubes (52) are respectively slidably provided inside the four strip grooves through the telescopic member (6). Both ends of the sliding tube (53) are respectively sealed and slidably provided inside two adjacent limit tubes (52). The four limit tubes (52) and the four sliding tubes (53) form a heat dissipation ring, and the connecting tube (54) is fixedly connected between the ring tube (51) and the limit tube (52). The upper side of the clamping block (41) is provided with a plurality of mounting openings, the side of the mounting opening is provided with a cooling opening, and a cooling component (8) is provided inside the mounting opening, and the cooling component (8) is used for cooling the upper end of the shaft; The cooling assembly (8) includes a plurality of cooling pipes (81), a connecting pipe (82), an elastic pipe (83) and a fin (84), wherein the plurality of cooling pipes (81) are respectively arranged inside a plurality of mounting openings, the connecting pipe (82) is inverted U-shaped, and the ends of the plurality of cooling pipes (81) are respectively set up Connected to both sides of the connecting tube (82), the elastic tube (83) is connected between the connecting tube (82) and the ring tube (51), and the plurality of fins (84) are fixedly connected to the inner side of the connecting tube (82).

2. A welding fixture for coupling production according to claim 1, characterized in that: The clamping assembly (4) further comprises four clamping pieces (42), the four clamping pieces (42) being fixedly connected to one end of the four clamping blocks (41) close to the middle of the clamping space, respectively. The clamping pieces (42) are arc-shaped pieces, and the four clamping pieces (42) form a clamping ring.

3. A welding fixture for coupling production according to claim 1, characterized in that: The annular tube (51) passes through the strip groove, and the telescopic member (6) includes a slider (61) and a telescopic tube (62). The slider (61) is limitedly slidably arranged inside the strip groove, and one end of the telescopic tube (62) is connected to the annular tube (51), and the other end is fixedly connected to the side of the slider (61).

4. A welding fixture for coupling production according to claim 1, characterized in that: The adjusting device (3) comprises a rotating disk (31) and four limiting rods (32). The rotating disk (31) is arranged at the output end of the base motor (1), and four adjusting openings are opened on the rotating disk (31). The four limiting rods (32) are respectively fixedly connected to the bottom of the clamping block (41) and are clamped inside the adjusting openings.

5. The welding fixture for coupling production according to claim 1, characterized in that: A limiting assembly (7) is provided on the upper side of each of the four limiting tubes (52), and the four limiting assemblies (7) are used to limit the position of the connecting piece.

6. A welding fixture for coupling production according to claim 5, characterized in that: The limiting assembly (7) comprises two telescopic rods (71) and a limiting block (72). The two telescopic rods (71) are fixedly connected to the upper surface of the limiting tube (52). The limiting block (72) is vertically fixedly connected to one end of the telescopic rod (71) away from the limiting tube (52). The limiting block (72) is an arc-shaped block.

7. A welding fixture for coupling production according to claim 1, characterized in that: The limiting tube (52) and the sliding tube (53) are both flat tubes, and the sliding tube (53) is made of an elastic material. The upper end of the connecting tube (82) is arc-shaped and is made of an elastic material.

8. The welding fixture for coupling production according to claim 1, characterized in that: An adjustment base (9) is provided in the middle of the clamping frame (2), and the adjustment base (9) is used to drive the shaft to move up and down. The adjustment base (9) includes a telescopic column (91) and four telescopic arms (92). The telescopic column (91) is vertically fixedly connected to the middle of the clamping frame (2), and the four telescopic arms (92) are annularly fixedly connected to the upper side of the telescopic column (91).

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