A base plate spindle welding fixture for an air compressor

Abstract

The application relates to the technical field of spindle welding fixtures, in particular to a bottom disc spindle welding fixture of an air compressor, which comprises a suspension mechanism, a shaft end calibration mechanism installed on the suspension mechanism, a shaft end clamping mechanism installed on the suspension mechanism, a distance adjusting mechanism connected in the shaft end clamping mechanism and a spindle clamped in the shaft end clamping mechanism and the shaft end calibration mechanism. The suspension mechanism is fixedly installed on a workbench or a wall, the shaft end calibration mechanism is movably installed on the suspension mechanism, the first pre-pressing piece and the second pre-pressing piece are moved towards the two ends of the spindle by controlling two racks through a motor, until the two ends of the spindle are quickly positioned and clamped, the two tapering column heads are finally retracted into the shell, the port of the shell is pressed against the shaft end surface, and the spindle is driven to rotate through cooperation of an external transmission device, so that the efficiency of welding repair is further improved.

Description

Technical Field

[0001] This invention relates to the field of spindle welding fixture technology, specifically to a chassis spindle welding fixture for an air compressor. Background Technology

[0002] The air compressor spindle is a core component that supports the rotor system and transmits power. It is connected to a motor via a coupling, converting electrical energy into mechanical energy to drive the impeller to rotate at high speed, thereby achieving the purpose of gas compression.

[0003] Since the spindle is a pipe component of the air compressor, wear will occur between the spindle and other components such as bearings and rotors. Once the wear becomes severe, the bearing and rotor mounting points on the spindle will become loose, which will affect the service life of the air compressor and also pose certain safety hazards. Therefore, the worn spindle needs to be repaired by welding to ensure that the spindle can rotate with excellent performance. However, the existing spindle welding fixture uses double-head fixing, which increases the coverage area of ​​the spindle and affects the efficiency of spindle welding. At the same time, the double-head fixing method requires double-end calibration, making the operation more complicated.

[0004] In view of this, a chassis spindle welding fixture for air compressors was designed to solve the above problems. Summary of the Invention

[0005] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0006] Therefore, the technical solution adopted in this invention is as follows:

[0007] A chassis spindle welding fixture for an air compressor includes a suspension mechanism, a shaft end calibration mechanism mounted on the suspension mechanism, a shaft end clamping mechanism mounted on the suspension mechanism, an adjustment mechanism connected within the shaft end clamping mechanism, and a spindle clamped within the shaft end clamping mechanism and the shaft end calibration mechanism. The suspension mechanism includes a truss, within which two crossbeams are fixedly installed. Positioning plates are fixedly installed at the inner ends of the crossbeams. A housing is fixedly installed at the bottom of the two crossbeams, and a motor is fixedly installed within the housing. Gears are fixedly installed on the motor. The shaft end calibration mechanism includes two base plates movably mounted on the two crossbeams. Two vertical rods are fixedly installed within the base plates. Top plates are installed at the top of the two vertical rods. U-shaped buckles are fixedly installed at the bottom of the base plates. A first pre-compression component is fixedly installed on the inner side of one base plate, and a second pre-compression component is fixedly installed on the inner side of the other base plate. Racks are fixedly installed at the bottom of both base plates. Both ends of the spindle are respectively clamped within the first and second pre-compression components.

[0008] In a preferred embodiment, the present invention may be further configured such that: the suspension mechanism further includes a load-bearing plate fixed to the workbench by expansion bolts, a fixed beam arm is fixedly installed on the inner side of the load-bearing plate, a hydraulic component is movably installed inside the load-bearing plate, an adapter is movably installed at the top end of the fixed beam arm, a fixed plate is installed at the outer end of the adapter, and a hydraulic sub-rod inside the hydraulic component is movably installed on the fixed plate.

[0009] In a preferred embodiment, the present invention can be further configured as follows: an auxiliary shaft is movably mounted inside the top support plate, two housings are snapped into the inner end of the auxiliary shaft, two combined bolts are installed inside the two housings, a conical column head is movably mounted inside the two housings, two sliders are fixedly mounted on the conical column head, and a compression spring is provided on the outside of the conical column head;

[0010] The inner wall of the outer casing is provided with a sliding groove, and the slider is movably installed in the sliding groove.

[0011] In a preferred embodiment, the present invention can be further configured as follows: the shaft end clamping mechanism includes a slide movably mounted on the outside of the crossbeam, two tail support plates and two head support plates symmetrically distributed on the two slides respectively, and the tail support plates and head support plates are provided with sliding grooves inside, and hexagonal threaded sleeves are movably mounted in the tail support plates and head support plates, with limit chucks installed in the internal threads of the hexagonal threaded sleeves, springs provided on the outside of the limit chucks, and arc-shaped pads installed on the inner end of the limit chucks.

[0012] In a preferred embodiment, the present invention can be further configured such that: the middle part of the limiting clamp is provided with a cylindrical end, and the cylindrical end is adapted to penetrate into the slide groove.

[0013] In a preferred embodiment, the present invention may be further configured such that: the adjusting mechanism includes a stabilizing pad fixedly mounted on one of the first support plates, a traction frame movably mounted in one of the tail support plates, two lever arms movably mounted between the stabilizing pad and the traction frame, a bidirectional lead screw movably mounted in the middle of the stabilizing pad, and an internal end plate movably mounted on the inner side of the traction frame, with the bidirectional lead screw threaded into the internal end plate.

[0014] In a preferred embodiment, the invention may be further configured such that the racks are adapted to extend through the U-shaped buckle, and the two racks are adapted to mesh with the gear.

[0015] In a preferred embodiment, the present invention can be further configured such that: the auxiliary shaft is composed of a T-shaped column head and a pulley, the tapered column head away from the auxiliary shaft is adapted to bear pressure at the center position of the outer end of the main shaft, and an anti-slip pad is fixedly installed on the end face of the housing facing the main shaft.

[0016] In a preferred embodiment, the present invention may be further configured such that the carriage, tail support plate and head support plate are all made of stainless steel, and the tail support plate and head support plate are both L-shaped.

[0017] In a preferred embodiment, the invention may be further configured such that the length of the traction frame is twice the lever arm length, and the section of the bidirectional lead screw is mounted inside the stabilizing pad via bearings.

[0018] By adopting the above technical solution, the beneficial effects achieved by the present invention are as follows:

[0019] 1. This invention involves fixing a suspension mechanism to a workbench or wall and mounting a shaft end calibration mechanism on the suspension mechanism. A motor controls two racks to bring the first preload and second preload components closer together towards both ends of the main shaft until the ends are quickly positioned and engaged. The two continuously contracting conical heads eventually retract into the housing, and the housing's ports press against the shaft end faces. Combined with an external transmission device, this allows the quickly positioned and calibrated main shaft to actively rotate during welding repair, further improving the efficiency of welding repair.

[0020] 2. This invention utilizes hydraulic components to control the truss to tilt and flip the spindle based on its irregular outer surface structure, until the horizontally positioned spindle flips around the top of the fixed beam arm. After flipping, the irregular part of the spindle's outer surface can be used with a handheld welding gun and laser welding for angle adjustment welding, improving the aesthetics of the weld on the outer inclined surface of the spindle.

[0021] 3. The present invention uses a shaft end clamping mechanism that is movably installed on two crossbeams and a distance adjustment mechanism to control the spacing of the shaft end clamping mechanism until the two sets of limit chucks move to both sides of the designated welding part of the spindle. As the housing drives the spindle to rotate, the part of the spindle that is pressured by the two sets of limit chucks can get stronger support during welding, ensuring the stability of the spindle during welding repair and subsequent polishing. Attached Figure Description

[0022] Figure 1 This is a schematic diagram illustrating the use of the present invention;

[0023] Figure 2 This is a bottom view diagram of the present invention;

[0024] Figure 3 This is a schematic diagram of the suspension mechanism of the present invention;

[0025] Figure 4 This is a schematic diagram of the shaft end calibration mechanism of the present invention;

[0026] Figure 5 For the present invention Figure 4 A partial diagram of the explosion;

[0027] Figure 6 For the present invention Figure 5 Enlarged view of point A in the middle;

[0028] Figure 7 This is a schematic diagram of the adjusting mechanism of the present invention;

[0029] Figure 8 This is a schematic diagram of the shaft end clamping mechanism of the present invention.

[0030] Figure label:

[0031] 100. Suspension mechanism; 110. Load-bearing plate; 1101. Fixed beam arm; 1102. Adapter; 120. Hydraulic component; 130. Fixing plate; 140. Truss; 1401. Crossbeam; 1402. Positioning plate; 150. Chassis; 1501. Motor; 1502. Gear;

[0032] 200. Shaft end calibration mechanism; 210. Base plate; 2101. Vertical rod; 2102. Top plate; 2103. U-shaped buckle; 220. First preload component; 230. Second preload component; 240. Rack; 250. Auxiliary shaft; 2501. Housing; 2502. Conical column head; 2503. Slider; 2504. Compression spring; 2505. Combination bolt; 2506. Slide groove;

[0033] 300. Shaft end clamping mechanism; 310. Slide carriage; 320. Tail support plate; 330. First support plate; 340. Slide groove; 350. Limiting chuck; 3501. Arc-shaped pad; 360. Spring; 370. Hexagonal threaded sleeve;

[0034] 400. Adjustment mechanism; 410. Stabilizing pad; 420. Double-acting lead screw; 430. Built-in end plate; 440. Traction frame; 450. Lever arm;

[0035] 500, spindle. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0037] It should be understood that these descriptions are merely exemplary and are not intended to limit the scope of the invention.

[0038] The following describes, with reference to the accompanying drawings, some embodiments of an air compressor chassis spindle welding fixture provided by the present invention. Example 1:

[0039] Combination Figures 1 to 8As shown, the present invention provides a chassis spindle welding fixture for an air compressor, comprising a suspension mechanism 100, a shaft end calibration mechanism 200 mounted on the suspension mechanism 100, a shaft end clamping mechanism 300 mounted on the suspension mechanism 100, an adjusting mechanism 400 connected within the shaft end clamping mechanism 300, and a spindle 500 clamped within the shaft end clamping mechanism 300 and the shaft end calibration mechanism 200. The suspension mechanism 100 provides a carrier for the shaft end calibration mechanism 200 and the shaft end clamping mechanism 300. The shaft end calibration mechanism 200 is used to perform double-end face calibration and rotation assistance on the spindle 500. The shaft end clamping mechanism 300 is used to perform double-end calibration and limit clamping on the spindle 500. The adjusting mechanism 400 is used to adjust the spacing of the shaft end clamping mechanism 300 to enhance the compressive strength of the part of the spindle 500 to be welded.

[0040] The suspension mechanism 100 includes a truss 140, two crossbeams 1401 are fixedly installed inside the truss 140, a positioning plate 1402 is fixedly installed at the inner end of the crossbeams 1401, a housing 150 is fixedly installed at the bottom of the two crossbeams 1401, a motor 1501 is fixedly installed inside the housing 150, and a gear 1502 is fixedly installed on the motor 1501.

[0041] The shaft end calibration mechanism 200 includes two base plates 210 movably mounted on two crossbeams 1401. Two vertical rods 2101 are fixedly installed inside the base plates 210. A top support plate 2102 is installed on the top of the two vertical rods 2101. A U-shaped buckle 2103 is fixedly installed on the bottom of the base plates 210. A first preload 220 is fixedly installed on the inner side of one base plate 210, and a second preload 230 is fixedly installed on the inner side of the other base plate 210. A rack 240 is fixedly installed on the bottom of both base plates 210.

[0042] The rack 240 is adapted to pass through the U-shaped buckle 2103, and the two racks 240 are adapted to mesh with the gear 1502;

[0043] The shaft end clamping mechanism 300 includes a slide 310 movably mounted on the outside of the crossbeam 1401. Two tail support plates 320 and two first support plates 330 are symmetrically distributed on the two slides 310 respectively. The tail support plates 320 and the first support plates 330 are both provided with sliding grooves 340. Hexagonal threaded sleeves 370 are movably mounted in the tail support plates 320 and the first support plates 330. Limiting chucks 350 are installed in the internal threads of the hexagonal threaded sleeves 370. Springs 360 are provided on the outside of the limiting chucks 350. Arc-shaped pads 3501 are installed on the inner end of the limiting chucks 350.

[0044] The carriage 310, tail support plate 320 and head support plate 330 are all made of stainless steel, and the tail support plate 320 and head support plate 330 are both L-shaped.

[0045] The limiting chuck 350 has a cylindrical end in the middle, and the cylindrical end is adapted to penetrate into the slide groove 340.

[0046] The two ends of the main shaft 500 are respectively engaged in the first pre-compression component 220 and the second pre-compression component 230.

[0047] When in use, the hydraulic component 120 is controlled in advance via the cloud until the hydraulic rod inside the hydraulic component 120 extends and pushes the fixed plate 130 and the truss 140 to be lifted upward away from the workbench or the ground until the truss 140 and the two crossbeams 1401 are parallel to the workbench or the ground.

[0048] As the motor 1501 starts and runs, the gear 1502 drives the two racks 240 to extend relative to each other. After the two racks 240 extend relative to each other, they will drive the two base plates 210 to move closer to the motor 1501 as the center. At the same time, the main shaft 500 is placed horizontally between the two base plates 210. As the two base plates 210 continue to retract, the first preload 220 and the second preload 230 will quickly clamp the two ends of the main shaft 500. The two auxiliary shafts 250, which are movably installed inside the two top plates 2102, will cooperate with the housing 2501 and the conical column head 2502 to adapt and clamp the center part of the end face of the main shaft 500.

[0049] Through an external transmission device and a pulley on one of the auxiliary shafts 250 segments of the track drive, the two outer shells 2501 pressed against the end face of the main shaft 500 will effectively assist the rotation of the clamped and horizontally positioned main shaft 500. After the main shaft 500 is assisted in rotation, it can be used with a handheld welding gun or an automated welding device for compensatory repair. By retracting the two sets of limit chucks 350, the two sets of limit chucks 350 will limit and constrain both sides of the welded segment of the main shaft 500, which can ultimately provide a sufficiently stable load-bearing capacity for subsequent polishing operations. Example 2:

[0050] Combination Figures 3 to 6 As shown, based on Embodiment 1, the suspension mechanism 100 further includes a load-bearing plate 110 fixed to the workbench by expansion bolts. A fixed beam arm 1101 is fixedly installed on the inner side of the load-bearing plate 110. A hydraulic component 120 is movably installed inside the load-bearing plate 110. An adapter 1102 is movably installed at the top of the fixed beam arm 1101. A fixed plate 130 is installed at the outer end of the adapter 1102. The hydraulic sub-rod inside the hydraulic component 120 is movably installed on the fixed plate 130.

[0051] Preferably, the load-bearing plate 110 has holes inside, and the load-bearing plate 110 is fixedly installed on the workbench or wall by multiple expansion bolts. The bottom end of the fixed beam arm 1101 is fixed inside the load-bearing plate 110 by pre-tightening bolts. According to the lifting height of the truss 140, the angle between the fixed beam arm 1101 and the load-bearing plate 110 is adjusted by using the pre-tightening bolts. Finally, the device can lift the main shaft 500 of different lengths at the selected height, ensuring that the lifted main shaft 500 is convenient for workers at different heights to perform welding, thereby reducing the problem of back injury caused by frequent bending over.

[0052] An auxiliary shaft 250 is movably installed inside the top support plate 2102. Two housings 2501 are snapped into the inner end of the auxiliary shaft 250. Two combination bolts 2505 are installed inside the two housings 2501. A conical column head 2502 is movably installed inside the two housings 2501. Two sliders 2503 are fixedly installed on the conical column head 2502. A compression spring 2504 is provided on the outside of the conical column head 2502.

[0053] The inner wall of the outer casing 2501 is provided with a sliding groove 2506, and the slider 2503 is movably installed in the sliding groove 2506;

[0054] The auxiliary shaft 250 consists of a T-shaped column head and a pulley. The tapered column head 2502, which is away from the auxiliary shaft 250, is adapted to bear pressure at the center of the outer end of the main shaft 500. The outer casing 2501 is fixedly installed with an anti-slip pad on the end face facing the main shaft 500.

[0055] Preferably, the rod segment of the auxiliary shaft 250 is mounted inside the top support plate 2102 via bearings, while the two outer shells 2501 are fixedly mounted outside the inner end of the auxiliary shaft 250 via two combination bolts 2505, and one end of the compression spring 2504 is fixedly mounted inside the tapered column head 2502, while the other end of the compression spring 2504 is adapted to bear pressure on the inner wall of the two outer shells 2501 after closing;

[0056] A T-shaped insert is fixedly installed at the inner end of the conical column head 2502, and the T-shaped insert is movably installed inside the two outer shells 2501 after they are closed. Example 3:

[0057] Combination Figure 7 and Figure 8 As shown, in the above embodiment, the adjusting mechanism 400 includes a stabilizing pad 410 fixedly installed on one of the first support plates 330, a traction frame 440 movably installed in one of the tail support plates 320, two lever arms 450 movably installed between the stabilizing pad 410 and the traction frame 440, a bidirectional lead screw 420 movably installed in the middle of the stabilizing pad 410, and an inner end plate 430 movably installed on the inner side of the traction frame 440, and the bidirectional lead screw 420 is threaded into the inner end plate 430.

[0058] The length of the traction frame 440 is twice that of the lever arm 450, and the rod segment of the double-acting screw 420 is mounted inside the stabilizing pad 410 via bearings.

[0059] Preferably, the stabilizing pad 410 is fixedly installed at the bottom of one of the first support plates 330 by welding, while the end of the traction frame 440 away from the lever arm 450 is movably installed in the plate end of the outer end of one of the tail support plates 320 via a shaft. According to the selection of different length spindles 500 and the areas to be repaired on their outer surfaces, the wheel at the outer end of the rotating double-acting screw 420 is used until the inner end plate 430 is relatively extended along the threaded section of the double-acting screw 420. Finally, the traction frame 440 and the two lever arms 450 will relatively retract, and the two sets of evenly distributed limit clamps 350 will perform bilateral limit clamping on the parts to be repaired on the outer surfaces of spindles 500 of different lengths. This ensures that after the damaged parts on the outer surface of the spindle 500 are welded, it is also convenient for subsequent polishing and avoids abnormal vibration during the repair of the spindle 500.

[0060] The working principle and usage process of this invention are as follows: The load-bearing plate 110 is fixedly installed on the workbench or wall using multiple expansion bolts. Then, the hydraulic component 120 is operated via the cloud. As the hydraulic sub-rod inside the hydraulic component 120 extends outward, the outer end of the hydraulic sub-rod pushes the fixing plate 130 and the adapter 1102 to tilt sideways around the top of the fixed beam arm 1101 until the truss 140 is parallel to the ground or workbench surface.

[0061] Next, the motor 1501 is started via the cloud. The motor 1501, in conjunction with the gear 1502, will drive the two racks 240. When the two racks 240 retract relative to each other, the two sets of bottom support plates 210, vertical rods 2101, and top support plates 2102 will move closer together with the auxiliary shaft 250 as the center. Then, the worker needs to place the main shaft 500 to be repaired and welded horizontally between the first pre-pressing component 220 and the second pre-pressing component 230 until the first pre-pressing component 220 and the second pre-pressing component 230 are positioned and sleeved at both ends of the main shaft 500. As the first pre-pressing component 220 and the second pre-pressing component 230 continue to extend into the shaft end of the main shaft 500, the two conical column heads 2502 will finally be pressed against the center position of the shaft end. After being pressed, the conical column heads 2502 will retract into the two outer shells 2501 until the outer ports of the two sets of outer shells 2501 bear the pressure on the end face of the shaft end of the main shaft 500.

[0062] Then manually rotate the double-acting screw 420 until the inner end plate 430 moves laterally along the threaded section of the double-acting screw 420, and the traction frame 440 and the lever arm 450 will stretch relative to each other. Finally, the distance between the two tail support plates 320 and the two head support plates 330 can be finely adjusted until the two adjacent sets of limit chucks 350 move to the two sides of the main shaft 500 segment selected for repair. Then, according to the different diameters at both ends of the main shaft 500, use a wrench to adjust the four hexagonal threaded sleeves 370 in sequence until the two adjacent limit chucks 350 limit the two sides of the main shaft 500 segment.

[0063] The external transmission device and track are connected to the pulley at the outer end of one of the auxiliary shafts 250. The auxiliary shaft 250 is driven by the external transmission device and track. At this time, the main shaft 500, which is clamped in the middle by the two auxiliary shafts 250, can rotate in conjunction with the welding repair operation. At the same time, during the rotation of the main shaft 500, the tilt of the main shaft 500 relative to the ground or workbench can be controlled by operating the hydraulic components 120, so as to achieve efficient welding repair according to the contour of the irregular parts on the outer surface of the main shaft 500.

[0064] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A chassis spindle welding fixture for an air compressor, comprising a suspension mechanism (100), characterized in that, It also includes a shaft end calibration mechanism (200) mounted on the suspension mechanism (100), a shaft end clamping mechanism (300) mounted on the suspension mechanism (100), a distance adjustment mechanism (400) connected in the shaft end clamping mechanism (300), and a main shaft (500) clamped in the shaft end clamping mechanism (300) and the shaft end calibration mechanism (200); the suspension mechanism (100) includes a truss (140), two crossbeams (1401) are fixedly installed in the truss (140), a positioning plate (1402) is fixedly installed at the inner end of the crossbeams (1401), a housing (150) is fixedly installed at the bottom of the two crossbeams (1401), a motor (1501) is fixedly installed in the housing (150), and a gear (1501) is fixedly installed on the motor (1501). 02); The shaft end calibration mechanism (200) includes two base plates (210) movably mounted on two crossbeams (1401). Two vertical rods (2101) are fixedly installed inside the base plates (210). A top plate (2102) is installed on the top of the two vertical rods (2101). A U-shaped buckle (2103) is fixedly installed on the bottom of the base plates (210). A first preload component (220) is fixedly installed on the inner side of one of the base plates (210), and a second preload component (230) is fixedly installed on the inner side of the other base plate (210). A rack (240) is fixedly installed on the bottom of both base plates (210). The two ends of the main shaft (500) are respectively snapped into the first preload component (220) and the second preload component (230). The suspension mechanism (100) also includes a load-bearing plate (110) fixed to the workbench by expansion bolts. A fixed beam arm (1101) is fixedly installed on the inner side of the load-bearing plate (110). A hydraulic component (120) is movably installed inside the load-bearing plate (110). An adapter (1102) is movably installed at the top of the fixed beam arm (1101). A fixed plate (130) is installed at the outer end of the adapter (1102). The hydraulic sub-rod inside the hydraulic component (120) is movably installed on the fixed plate (130). An auxiliary shaft (250) is movably installed inside the top support plate (2102). Two outer shells (2501) are snapped into the inner end of the auxiliary shaft (250). Two combination bolts (2505) are installed inside the two outer shells (2501). A conical column head (2502) is movably installed inside the two outer shells (2501). Two sliders (2503) are fixedly installed on the conical column head (2502). A compression spring (2504) is provided on the outside of the conical column head (2502). A first sliding groove (2506) is opened on the inner wall of the outer shell (2501), and the sliders (2503) are movably installed in the first sliding groove (2506).

2. The chassis spindle welding fixture for an air compressor according to claim 1, characterized in that, The shaft end clamping mechanism (300) includes a slide (310) movably mounted on the outside of the crossbeam (1401). Two tail support plates (320) and two first support plates (330) are symmetrically distributed on the two slides (310). The tail support plates (320) and the first support plates (330) are both provided with a second sliding groove (340). Hexagonal threaded sleeves (370) are movably mounted in the tail support plates (320) and the first support plates (330). A limit chuck (350) is threaded in the hexagonal threaded sleeve (370). A spring (360) is provided on the outside of the limit chuck (350). An arc-shaped pad (3501) is installed on the inner end of the limit chuck (350).

3. The chassis spindle welding fixture for an air compressor according to claim 2, characterized in that, The limiting clamp (350) has a cylindrical end in the middle, and the cylindrical end is adapted to penetrate into the second slide groove (340).

4. The chassis spindle welding fixture for an air compressor according to claim 1, characterized in that, The adjusting mechanism (400) includes a stabilizing pad (410) fixedly installed on one of the first support plates (330) and a traction frame (440) movably installed in one of the tail support plates (320). Two lever arms (450) are movably installed between the stabilizing pad (410) and the traction frame (440). A double-acting screw (420) is movably installed in the middle of the stabilizing pad (410). An internal end plate (430) is movably installed on the inner side of the traction frame (440), and the double-acting screw (420) is threaded into the internal end plate (430).

5. The chassis spindle welding fixture for an air compressor according to claim 1, characterized in that, The rack (240) is adapted to pass through the U-shaped buckle (2103), and the two racks (240) are adapted to mesh with the gear (1502).

6. The chassis spindle welding fixture for an air compressor according to claim 1, characterized in that, The auxiliary shaft (250) is composed of a T-shaped column head and a pulley. The conical column head (2502) is adapted to bear pressure at the center position of the outer end of the main shaft (500) away from the auxiliary shaft (250). The outer shell (2501) is fixedly installed with an anti-slip pad on the end face facing the main shaft (500).

7. The chassis spindle welding fixture for an air compressor according to claim 2, characterized in that, The carriage (310), tail support plate (320) and head support plate (330) are all made of stainless steel, and the tail support plate (320) and head support plate (330) are both L-shaped.

8. The chassis spindle welding fixture for an air compressor according to claim 4, characterized in that, The length of the traction frame (440) is twice the length of the lever arm (450), and the rod segment of the bidirectional lead screw (420) is mounted inside the stabilizing pad (410) via bearings.

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