A vacuum pump shell steel strip welding device

Abstract

The application relates to a vacuum pump shell steel strip welding device, and relates to the technical field of vacuum pump machining.The device comprises a support, a welding assembly, a steel strip feeding assembly, a shell supporting assembly and a detection assembly; the welding assembly is connected with the support to weld the steel strip on the shell; the shell supporting assembly comprises a supporting shaft rotationally connected with the support and a plurality of supporting plates, the supporting plates are circumferentially arranged along the supporting shaft and connected with the supporting shaft through a connecting assembly, and a rotary motor for driving the supporting shaft to rotate is arranged on the support; the detection assembly comprises a detection gear connected with the supporting shaft, a detection rack and a detection sensor, the detection gear is coaxially connected with the supporting shaft, the detection rack is slidingly connected with the support and is engaged with the detection gear, a plurality of detection protrusions are arranged on the detection rack, the detection protrusions correspond to the steel strips one by one, and the detection sensor is used for detecting the positions of the protrusions and is electrically connected with the rotary motor. The welding device has the advantages of facilitating batch processing of vacuum pump shells.

Description

Technical Field

[0001] This application relates to the technical field of vacuum pump processing, and in particular to a welding device for steel strips for vacuum pump housings. Background Technology

[0002] A vacuum pump is a device or equipment that uses mechanical, physical, chemical, or physicochemical methods to evacuate a container and create a vacuum. During operation, the rotation of the internal rotor of a vacuum pump generates a large amount of heat. To better dissipate this heat, multiple steel bars are welded onto the outer casing of the vacuum pump as heat dissipation fins.

[0003] In related technologies, such as Chinese patent publication number CN114986005A, a vacuum pump device is proposed, including a base plate, a vertical plate fixed to one side of the base plate, a rotary motor fixed to the vertical plate, a rotary shaft fixed to the output end of the rotary motor, a support plate fixed to the end of the rotary shaft, a sliding plate slidably connected to the rotary shaft, and multiple fixing devices evenly arranged between the sliding plate and the support plate. Each fixing device includes a positioning rod hinged to the sliding plate. A support rod hinged to the support plate is provided at a position corresponding to the positioning rod, and the support rod and the positioning rod are connected by a limiting rod. Multiple support cylinders are also fixed to the vertical plate, and a fixing cylinder is fixed to the bottom of the vertical plate. The piston rod of the fixing cylinder... A fixed block is fixed to the base plate. A lead screw and multiple sliding rods are also provided on one side of the base plate. The lead screw is driven to rotate by a translation motor. A sliding table is also provided above the base plate. The lead screw passes through the sliding table and is threadedly connected to the sliding table. A mounting plate is fixed on the sliding table. A welding motor is fixed on the mounting plate. A screw is fixed to the output end of the welding motor. A slider is also provided above the base plate. A threaded tube is fixed on the slider. The screw is inserted into the threaded tube and threadedly connected to the threaded tube. Connecting blocks are symmetrically fixed on both sides of the slider. A welding head is provided between the two connecting blocks. A connecting shaft is fixed on both sides of the welding head. The connecting shaft passes through the corresponding connecting block and is rotatably connected to the connecting block. A torsion spring is also provided on the connecting shaft. One end of the torsion spring is fixed to the connecting block, and the other end of the torsion spring is fixed to the connecting shaft.

[0004] This device enables automated welding of steel bars on the outer shell. During welding, the welding head moves from one end of the steel bar to the other, allowing for omnidirectional welding of the steel bar. This results in good welding quality and effectively prevents the steel bars from being shaken off during vacuum pump operation.

[0005] The aforementioned technologies have the following drawbacks: after a steel bar is welded, workers need to measure and control the rotation angle of the outer casing on-site or mark the position on the outer casing in advance to determine the position of the next steel bar, which makes the batch processing of vacuum pump casings inconvenient. Summary of the Invention

[0006] To address the issue of ease of mass production of vacuum pump housings, this application provides a welding device for steel bars of vacuum pump housings.

[0007] This application provides a welding device for steel bars on a vacuum pump housing, which adopts the following technical solution:

[0008] A vacuum pump housing steel bar welding device, comprising:

[0009] support;

[0010] A welding assembly for welding steel bars to the outer casing, the welding assembly being connected to a support and capable of moving circumferentially along the steel bars;

[0011] The steel bar feeding assembly is used to feed steel bars to a position that contacts the vacuum pump housing;

[0012] Housing support assembly for supporting the vacuum pump housing, the housing support assembly comprising:

[0013] A support shaft is rotatably connected to a bracket, and a rotary motor for driving the support shaft to rotate is provided on the bracket;

[0014] Multiple support plates are provided, which are arranged circumferentially along the support axis and connected to the support axis through a connecting component so that the multiple support plates can move in a direction close to or away from the support axis. The side of the multiple support plates away from the support axis abuts against the inner wall of the outer shell.

[0015] The welding apparatus further includes a detection component, which includes:

[0016] The inspection gear is fixedly connected coaxially to the support shaft.

[0017] The detection rack is slidably connected to the bracket and meshes with the detection gear. The detection rack is provided with multiple detection protrusions, each of which corresponds to a steel bar, and the distance between adjacent detection protrusions is the distance between adjacent steel bars.

[0018] A detection sensor is used to detect the position of the protrusion. The detection sensor is fixedly connected to the bracket and electrically connected to the rotating motor to shut down the rotating motor.

[0019] Furthermore, the connection component includes:

[0020] A connecting ring includes an inner ring and an outer ring, wherein the inner ring is threadedly connected to a support shaft, and the outer ring is rotatably sleeved on the outside of the inner ring;

[0021] Connecting ring, which connects to the support shaft;

[0022] There are multiple connecting rods, which are divided into two groups. The two groups of connecting rods are arranged along the axial direction of the support shaft. The connecting rods in the same group correspond one-to-one with the support plates. One end of the connecting rods in one group is rotatably connected to the corresponding support plate, and the other end is rotatably connected to the outer ring. One end of the connecting rods in the other group is rotatably connected to the corresponding support plate, and the other end is rotatably connected to the connecting ring. Both groups of connecting rods are inclined, and the inclination directions of the two groups of connecting rods are opposite.

[0023] Furthermore, the connecting ring is slidably connected to the support shaft along the length direction of the support shaft, and the support shaft is provided with a drive assembly for driving the connecting ring to slide.

[0024] Furthermore, the detection rack has a groove perpendicular to the length of the steel bar, the groove being a T-shaped groove, and the detection protrusion includes:

[0025] The fixing part is located inside the slide groove and can abut against the side wall of the slide groove that is away from the ground;

[0026] The positioning part is located outside the slide groove and can abut against the bracket;

[0027] The connecting part is fixedly connected to the fixing part at one end, and the other end passes through the slide groove and is threadedly connected to the positioning part.

[0028] Furthermore, the cross-section of the fixing part is set to be rectangular, and along the direction perpendicular to the length of the slide, the diagonal dimension of the cross-section of the fixing part is greater than the distance between the two side walls of the slide.

[0029] Furthermore, the moving component includes a moving cylinder, the cylinder body of which is fixedly connected to the bracket, and the piston rod of which is fixedly connected to the feeding clamp.

[0030] In summary, the beneficial technical effects of this application are as follows: the setting of the detection component allows the operator to pre-set the position of the detection protrusion, so that when the detection sensor senses the detection protrusion, it can stop the rotating motor in time, thereby facilitating the batch processing of vacuum pump housings. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 This is a partial sectional view of the support shaft in an embodiment of this application;

[0033] Figure 3 This is a schematic diagram of the overall structure of the storage box in an embodiment of this application;

[0034] Figure 4 This is a schematic diagram of the overall structure of the steel bar feeding assembly in the embodiments of this application;

[0035] Figure 5 This is a schematic diagram of the overall structure from another perspective of an embodiment of this application;

[0036] Figure 6 This is a schematic diagram of the overall structure for detecting protrusions in an embodiment of this application.

[0037] Reference numerals: 1. Bracket; 11. Rotary motor; 13. Moving cylinder; 2. Welding assembly; 21. Welding torch; 22. Base; 23. Control assembly; 231. Control screw; 232. Control motor; 3. Outer shell support assembly; 31. Support shaft; 311. Support sub-shaft; 312. Connecting sub-shaft; 3121. Positioning plate; 32. Support plate; 4. Steel bar feeding assembly; 41. Storage box; 411. Partition; 412. Gap; 413. Fixing block; 414. Positioning block; 415. Clamping hole; 42. Feeding clamp; 5. Connecting assembly; 51. Connecting ring; 511. Inner ring; 512. Outer ring 52. Connecting ring; 53. Connecting rod; 6. Drive assembly; 61. Drive gear; 62. Transmission gear; 63. Drive roller; 64. Return spring; 65. Drive rope; 7. Sliding assembly; 71. Sliding plate; 72. Sliding cylinder; 73. Sliding piston; 74. Sliding teeth; 75. Sliding bar; 8. Detection assembly; 81. Detection gear; 82. Detection rack; 821. Detection protrusion; 8211. Fixing part; 8212. Positioning part; 8213. Connecting part; 822. Slide groove; 83. Detection sensor; 9. Adjustment assembly; 91. Adjusting plate; 92. Adjusting piston; 93. Adjusting cylinder. Detailed Implementation

[0038] The technical solutions of this application will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this application. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0039] This application discloses a welding device for steel bars on a vacuum pump housing. (Refer to...) Figure 1 The welding device includes a support frame 1, a welding assembly 2, a shell support assembly 3, and a steel bar feeding assembly 4.

[0040] The bracket 1 is fixedly connected to the ground.

[0041] Reference Figure 1 and Figure 2The outer shell support assembly 3 includes a support shaft 31 and multiple support plates 32. The support shaft 31 includes a support sub-shaft 311 and a connecting sub-shaft 312. One end of the support sub-shaft 311 is rotatably connected to the bracket 1 with its own axis as the rotation axis. The other end of the support sub-shaft 311 is fixedly connected to a rotating shaft. One end of the connecting sub-shaft 312 is rotatably connected to the rotating shaft, and the axis of the rotating shaft is perpendicular to the axis of the support sub-shaft 311. The other end of the connecting sub-shaft 312 is rotatably mounted on the bracket 1. In this embodiment, two rotating wheels are rotatably connected to the bracket 1. The end of the connecting sub-shaft 312 away from the support sub-shaft 311 is mounted on the two rotating wheels, thereby achieving a rotatable connection between the connecting sub-shaft 312 and the bracket 1. In this embodiment, three support plates 32 are provided, evenly distributed along the circumference of the connecting sub-shaft 312, and multiple support plates 32 are connected to the connecting sub-shaft 312 through a connecting assembly 5.

[0042] The connecting assembly 5 includes a connecting ring 51, a connecting ring 52, and multiple connecting rods 53. The connecting ring 51 includes an inner ring 511 and an outer ring 512. The inner ring 511 is threadedly connected to the connecting sub-shaft 312, and the outer ring 512 is rotatably sleeved on the outside of the inner ring 511. To facilitate the rotation of the inner ring 511 by the operator, the inner ring 511 is larger than the outer ring 512 along the axial direction of the connecting sub-shaft 312. In this embodiment, six connecting rods 53 are provided, each divided into two groups. Each group of connecting rods 53 corresponds one-to-one with a support plate 32. One end of one group of connecting rods 53 is rotatably connected to the corresponding support plate 32, and the other end is rotatably connected to the outer ring 512. The other group of connecting rods 53 is rotatably connected to the corresponding support plate 32, and the other end is rotatably connected to the connecting ring 52. Both groups of connecting rods 53 are inclined, and the inclination directions of the two groups of connecting rods 53 are opposite.

[0043] The connecting ring 52 can slide axially along the connecting sub-shaft 312. A drive assembly 6 for driving the sliding of the connecting ring 52 is provided on the support shaft 31. The drive assembly 6 includes a drive gear 61, a transmission gear 62, a drive roller 63, a return spring 64, and a drive rope 65. The drive gear 61 is coaxially and fixedly connected to the rotating shaft. The transmission gear 62 is rotatably connected to the connecting sub-shaft 312 and meshes with the drive gear 61. The transmission gear 62 is coaxially and fixedly connected to the drive roller 63. One end of the drive rope 65 is fixedly connected to the connecting ring 52, and the other end is wound around the drive roller 63. One end of the return spring 64 is fixedly connected to the connecting ring 52, and the other end is fixedly connected to the connecting sub-shaft 312. Under the elastic force of the return spring 64, the support plate 32 is in close contact with the inner wall of the outer casing.

[0044] After the outer casing is installed in place, the worker rotates the inner ring 511 so that the support plate 32 abuts against the inner wall of the outer casing. After the outer casing is processed, the worker holds the connecting shaft 312 and rotates it, so that the transmission gear 62 rotates around the drive gear 61, thereby causing the drive rope 65 to wrap around the drive roller 63, which in turn pulls the connecting ring 52 to move away from the connecting ring 51. Finally, the abutment between the support plate 32 and the inner wall of the outer casing is released, so that the worker can remove the outer casing.

[0045] To facilitate the installation of the housing into the appropriate position by the staff, a positioning plate 3121 is fixedly connected to one end of the connecting sub-shaft 312 near the supporting sub-shaft 311, and the positioning plate 3121 can abut against one end of the housing.

[0046] Reference Figure 3 The bracket 1 has a slotted hole for the steel bar to pass through, and the slotted hole is located directly below the support shaft 31. The welding assembly 2 includes a welding torch 21 and a base 22. The welding torch 21 is fixedly connected to the base 22, and the base 22 can move along the length of the steel bar. The side of the base 22 closest to the ground can abut against the bracket 1. The bracket 1 is provided with a control assembly 23 for controlling the movement of the base 22. The control assembly 23 includes a control screw 231 and a control motor 232, and the control motor 232 is fixedly connected to the bracket 1. The control screw 231 is located on one side of the slotted hole and is arranged along the length of the steel bar, and is rotatably mounted on the bracket 1. The control screw 231 is coaxially fixedly connected to the output shaft of the control motor 232. The base 22 is threadedly connected to the control screw 231.

[0047] Once the steel bar is firmly in contact with the outer shell, the control motor 232 is activated to rotate the control screw 231 and move the base 22, thereby performing welding work on one side of the steel bar.

[0048] Reference Figure 4 and Figure 5 The steel bar feeding assembly 4 includes a storage box 41 and a feeding clamp 42. Multiple partitions 411 are fixedly connected inside the storage box 41. The partitions 411 are arranged along the length of the steel bar, and are spaced apart in a direction perpendicular to the length of the steel bar. The two partitions 411 on each side are spaced apart from the corresponding side wall of the storage box 41, thus forming multiple gaps 412 for placing the steel bars inside the storage box 41. To prevent the steel bars from tipping over when placed in the gaps 412, multiple fixing blocks 413 are fixedly connected to one side wall of the gap 412, and multiple positioning blocks 414 are fixedly connected to the other side wall. The positioning blocks 414 correspond one-to-one with the fixing blocks 413, and are spaced apart to allow the steel bars to be inserted. To improve the stability of the steel bars, the positioning blocks 414 are rubber blocks, and the distance between the positioning blocks 414 and the corresponding fixing blocks 413 is less than the thickness of the steel bar.

[0049] The storage box 41 is located below the strip hole and is connected to the bracket 1. The storage box 41 can move in a direction perpendicular to the length of the steel strip. The bracket 1 is provided with a sliding component 7 for driving the storage box 41 to slide.

[0050] The feeding clamp 42 is located below the storage box 41, and the storage box 41 has multiple clamping holes 415 for the feeding clamp 42 to pass through. The feeding clamp 42 is located below the storage box 41 and includes an integrally formed vertical rod and a U-shaped frame. The opening of the U-shaped frame faces the storage box 41, and the inner wall of the opening of the U-shaped frame is set as a slope to facilitate the insertion of the steel bar into the U-shaped frame. The feeding clamp 42 is connected to the bracket 1 and can move in a direction close to or away from the outer shell so that the steel bar and the outer shell abut against each other. The bracket 1 is provided with a moving assembly for driving the feeding clamp 42 to move. The moving assembly includes a moving cylinder 13. The cylinder body of the moving cylinder 13 is fixedly connected to the bracket 1, and the piston rod of the moving cylinder 13 is fixedly connected to the vertical rod.

[0051] The worker places the steel bar into the storage box 41. When the steel bar is being fed, the worker activates the moving cylinder 13, which drives the feeding clamp 42 to move closer to the outer shell. When the feeding clamp 42 passes through the clamping hole 415, the steel bar is inserted into the feeding clamp 42 under the action of the fixing block 413 and the positioning block 414 until the steel bar contacts the bottom wall of the U-shaped frame. This causes the feeding clamp 42 to move the steel bar until it contacts the outer shell, thus completing the feeding of the steel bar.

[0052] The sliding assembly 7 includes a sliding plate 71, two sliding cylinders 72, two sliding pistons 73, two sliding teeth 74, and two sliding bars 75. The storage box 41 is bolted to the sliding plate 71. The bracket 1 has two sliding grooves perpendicular to the length of the steel bars. Sliding blocks that slide along the sliding grooves are fixedly connected to both sides of the sliding plate 71. The sliding bars 75 are arranged along the length of the sliding grooves and are fixedly connected to the sliding plate 71. Multiple teeth are fixedly connected to the sliding bars 75, arranged sequentially along the length of the sliding bars 75. The sliding teeth 74 mesh with the teeth on the sliding bars 75 and are rotatably connected to the sliding pistons 73. A return torsion spring is provided on the sliding pistons 73, with one end fixedly connected to the sliding pistons 73 and the other end fixedly connected to the sliding teeth 74. Under the elastic force of the return torsion spring, the sliding teeth 74 mesh with the teeth on the sliding bars 75. The sliding piston 73 is sealed and slidably connected to the sliding cylinder 72 along the length of the sliding groove, and the sliding cylinder 72 is bolted to the bracket 1. The bracket 1 is provided with an adjustment assembly for adjusting the movement of the sliding piston 73.

[0053] The control adjustment component increases the pressure inside the sliding cylinder 72, causing the sliding piston 73 to move the sliding teeth 74, which in turn moves the sliding bar 75, i.e., the storage box 41 moves. The control adjustment component also decreases the pressure inside the sliding cylinder 72, causing the sliding piston 73 to move the sliding teeth 74 in the opposite direction. Since the sliding teeth 74 are rotatably connected to the sliding piston 73, the sliding teeth 74 do not easily move the sliding bar 75, thus causing the sliding teeth 74 to reset, and the storage box 41 does not easily move.

[0054] The adjusting assembly 9 includes an adjusting spring, an adjusting plate 91, an adjusting piston 92, and an adjusting cylinder 93. The adjusting cylinder 93 is bolted to the bracket 1 and communicates with the sliding cylinder 72. Both the adjusting cylinder 93 and the sliding cylinder 72 contain hydraulic oil. The adjusting plate 91 is fixedly connected to the piston rod of the moving cylinder 13. The adjusting piston 92 is sealed and slidably connected to the adjusting cylinder 93 and is located on the moving trajectory of the adjusting plate 91. The adjusting spring is located inside the adjusting cylinder 93, with one end abutting against the bottom of the adjusting cylinder 93 and the other end abutting against the adjusting piston 92. Under the action of the adjusting spring's elastic force, the adjusting piston 92 is positioned at its extension point from the adjusting cylinder 93.

[0055] Reference Figure 5 and Figure 6 The welding device also includes a detection assembly 8 for detecting the rotation angle of the support shaft 31. The detection assembly 8 includes a detection gear 81, a detection rack 82, and a detection sensor 83. The detection gear 81 is coaxially and fixedly connected to the connecting sub-shaft 312. The detection rack 82 is slidably connected to the bracket 1 along a direction perpendicular to the length of the steel strip. The detection rack 82 is located on the side of the detection gear 81 facing away from the ground, and the detection rack 82 meshes with the detection gear 81. The detection gear 81 is provided with a plurality of detection protrusions 821, each corresponding to a steel strip. The detection sensor 83 is fixedly connected to the bracket 1 to detect the position of the protrusions 821. In this embodiment, the detection sensor 83 is a laser sensor.

[0056] To enable the detection rack 82 to be used for positioning steel bars with different spacings, a T-shaped groove 822 is formed along its length on the detection rack 82. The detection protrusion 821 includes a fixing part 8211, a positioning part 8212, and a connecting part 8213. The fixing part 8211 has a rectangular cross-section and is located inside the groove 822. Along the length of the groove 822, the diagonal dimension of the fixing part 8211 is larger than the distance between the two side walls of the groove 822, thus making it difficult for the fixing part to rotate within the groove 822. The positioning part 8212 is located outside the groove 822, and its size is larger than the opening size of the groove 822, allowing the positioning part 8212 to abut against the side of the bracket 1. The connecting part 8213 is rod-shaped, with one end fixedly connected to the fixing part 8211 and the other end extending out of the groove 822 and threadedly connected to the positioning part 8212. When the operator needs to adjust the position of the detection protrusion 821, rotate the positioning part 8212 to release the contact between the positioning part 8212 and the bracket 1, and then slide the detection protrusion 821 to the appropriate position; when the detection protrusion 821 is moved into place, rotate the positioning part 8212 to make the positioning part 8212 contact the bracket 1 so that the detection protrusion 821 is not easy to move further.

[0057] The implementation principle of the vacuum pump housing steel bar welding device in this application embodiment is as follows: After the operator installs the housing onto the housing support assembly 3, the moving cylinder 13 is activated, which causes the feeding clamp 42 to move the steel bar to a position that abuts against the housing. At this time, the welding assembly 2 is controlled so that the welding assembly 2 can weld the steel bar. After one steel bar is welded, the rotary motor 11 is activated, which causes the detection gear 81 to drive the detection rack 82 to move until the detection protrusion 821 is aligned with the detection sensor 83, so as to complete the positioning of the next welding position of the steel bar.

[0058] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A welding device for steel bars on the outer casing of a vacuum pump, characterized in that, include: Support (1); Welding assembly (2) for welding steel bars to the outer shell, the welding assembly (2) is connected to the bracket (1) and is movable along the circumference of the steel bars; The steel bar feeding assembly (4) is used to feed the steel bar to a position that abuts against the vacuum pump housing; The outer shell support assembly (3) is used to support the vacuum pump housing. The outer shell support assembly (3) includes: a support shaft (31) which is rotatably connected to the bracket (1). The bracket (1) is provided with a rotary motor (11) for driving the support shaft (31) to rotate. Multiple support plates (32) are provided. Multiple support plates (32) are arranged circumferentially along the support shaft (31) and connected to the support shaft (31) through the connecting component (5) so that multiple support plates (32) can move in a direction close to or away from the support shaft (31). The side of multiple support plates (32) away from the support shaft (31) abuts against the inner wall of the outer shell. The welding apparatus further includes a detection component (8), which includes: The detection gear (81) is coaxially and fixedly connected to the support shaft (31); The detection rack (82) is slidably connected to the bracket (1) and meshes with the detection gear (81). The detection rack (82) is provided with a plurality of detection protrusions (821). The detection protrusions (821) correspond one-to-one with the steel bars, and the distance between adjacent detection protrusions (821) is the distance between adjacent steel bars. The detection sensor (83) is used to detect the position of the detection protrusions (821). The detection sensor (83) is fixedly connected to the bracket (1) and electrically connected to the rotary motor (11) to turn off the rotary motor (11).

2. The vacuum pump housing steel bar welding device according to claim 1, characterized in that, The connecting assembly (5) includes: a connecting ring (51), including an inner ring (511) and an outer ring (512), wherein the inner ring (511) is threadedly connected to the support shaft (31), and the outer ring (512) is rotatably sleeved on the outside of the inner ring (511); a connecting ring (52), which is connected to the support shaft (31); and a connecting rod (53), which is provided in multiple forms, and the multiple connecting rods (53) are divided into two groups. The two groups of connecting rods (53) are arranged axially along the support shaft (31). The connecting rods (53) in the same group correspond one-to-one with the support plate (32). One end of one group of connecting rods (53) is rotatably connected to the corresponding support plate (32), and the other end is rotatably connected to the outer ring (512). One end of the other group of connecting rods (53) is rotatably connected to the corresponding support plate (32), and the other end is rotatably connected to the connecting ring (52). Both groups of connecting rods (53) are inclined, and the inclination directions of the two groups of connecting rods (53) are opposite.

3. The vacuum pump housing steel bar welding device according to claim 2, characterized in that, The connecting ring (52) is slidably connected to the support shaft (31) along the length direction of the support shaft (31), and the support shaft (31) is provided with a driving assembly (6) for driving the connecting ring (52) to slide.

4. The vacuum pump housing steel bar welding device according to claim 3, characterized in that, The support shaft (31) includes a connecting sub-shaft (312) and a support sub-shaft (311). One end of the support sub-shaft (311) is rotatably connected to the frame, and the other end is rotatably connected to one end of the connecting sub-shaft (312) via a rotating shaft. The other end of the connecting sub-shaft (312) is mounted on the bracket (1). The drive assembly (6) includes: a drive gear (61), which is coaxially and fixedly connected to the rotating shaft; a transmission gear (62), which is rotatably connected to the connecting sub-shaft (312) and meshes with the drive gear (61); a drive roller (63), which is coaxially and fixedly connected to the transmission gear (62); a return spring (64), which is sleeved on the outside of the connecting sub-shaft (312), and one end of the return spring (64) is fixedly connected to the connecting sub-shaft (312), and the other end is fixedly connected to the connecting ring (52); and a drive rope (65), one end of which is fixedly connected to the connecting ring (52), and the other end is wound around the drive roller (63).

5. The vacuum pump housing steel bar welding device according to claim 1, characterized in that, The detection rack (82) has a groove (822) perpendicular to the length of the steel bar. The groove (822) is a T-shaped groove. The detection protrusion (821) includes: a fixing part (8211) located inside the groove (822) and able to abut against the side wall of the groove (822) away from the ground; a positioning part (8212) located outside the groove (822) and able to abut against the bracket (1); and a connecting part (8213) with one end fixedly connected to the fixing part (8211) and the other end threadedly connected to the positioning part (8212) through the groove (822).

6. The vacuum pump housing steel bar welding device according to claim 5, characterized in that, The cross-section of the fixing part (8211) is rectangular, and along the direction perpendicular to the length of the slide (822), the diagonal dimension of the cross-section of the fixing part (8211) is greater than the distance between the two side walls of the slide (822).

7. The vacuum pump housing steel bar welding device according to claim 1, characterized in that, The steel bar feeding assembly (4) includes: a storage box (41), located below the outer shell support assembly (3), and slidably connected to the bracket (1) in a direction perpendicular to the length of the steel bar. The bracket (1) is provided with a sliding assembly (7) for driving the storage box (41) to slide; a feeding clamp (42), used to clamp the steel bar. The feeding clamp (42) is connected to the bracket (1) and can move in a direction close to or away from the outer shell to bring the steel bar into contact with the outer shell. The bracket (1) is provided with a moving assembly for driving the feeding clamp (42) to move.

8. The vacuum pump housing steel bar welding device according to claim 7, characterized in that, The moving component includes a moving cylinder (13), the cylinder body of which is fixedly connected to the bracket (1), and the piston rod of which is fixedly connected to the feeding clamp (42).

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