A centering device for compressor assembly

Abstract

The present invention discloses a centering device for compressor assembly, comprising a machine platform, on which a support member, a displacement mechanism 1, a displacement mechanism 2 and a limit mechanism are installed, the displacement mechanism 1 and the displacement mechanism 2 are drivingly connected to a moving plate, a pressing mechanism is respectively installed on the left and right sides of the upper part of the moving plate, a pressing member is drivingly connected on the pressing mechanism, the pressing mechanism comprises a mounting seat 1, a fixing plate is installed on the upper part of the mounting seat 1, and an extension plate is installed on the outer side of the fixing plate. The present invention can realize the centering process between the cylinder head and the cylinder.

Description

Technical Field

[0001] The invention relates to the technical field of compressor production, and more specifically, to a centering device for compressor assembly. Background Art

[0002] Micro compressors are small in size, light in weight, high in power, low in energy consumption, quiet and vibration-free, variable in frequency, and easy to precisely control. They are the first choice for ideal mobile or portable small thermal management systems. Micro compressors can be widely used in refrigeration units of air conditioning devices, water cooling devices, and commercial refrigeration devices. In the production of micro compressors, due to the high assembly precision requirements, the cylinder head and cylinder need to be centered. Summary of the invention

[0003] The object of the present invention is to overcome the above-mentioned deficiencies of the prior art and provide a centering device for compressor assembly.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] The present invention discloses a centering device for assembling a compressor, comprising a machine platform, on which a support member, a displacement mechanism 1, a displacement mechanism 2 and a limiting mechanism are installed, the displacement mechanism 1 and the displacement mechanism 2 are drivingly connected to a movable plate, a clamping mechanism is respectively installed on the left and right sides of the upper part of the movable plate, the clamping mechanism is drivingly connected to a clamping member, the clamping mechanism comprises a mounting seat 1, a fixed plate is installed on the upper part of the mounting seat 1, an extension plate is installed on the outer side of the fixed plate, a driving mechanism 1 is arranged on the extension plate, a sliding block is slidingly arranged on the mounting seat 1, the driving mechanism 1 is drivingly connected to the sliding block, the clamping member comprises a mounting block 1 installed on the sliding block, a clamping block is installed on the inner side of the mounting block 1, the limiting mechanism comprises a mounting seat 3, a pneumatic measuring instrument is installed on the mounting seat 3, the pneumatic measuring instrument comprises a positioning shaft, a measuring shaft is connected to the upper part of the positioning shaft, and a clamping mechanism installed on the machine platform is also included.

[0006] Furthermore, a second driving mechanism is installed on the fixed plate, and a locking block is connected to the second driving mechanism. A locking slope is provided on the inner side of the locking block, and a fixed block is installed on the outer side of the sliding block, and a roller is rotatably provided on the fixed block.

[0007] Furthermore, the limiting mechanism includes a base installed on the machine platform, a mounting block 2 is arranged on the upper part of the base, a mounting seat 2 is connected to the mounting block 2, a through hole 1 is opened in the mounting block 2, a movable groove is opened in the mounting seat 2, a limiting block is arranged in the movable groove, a through hole 2 is opened on the side of the mounting block 2, the movable groove is connected with the through hole 1 through the through hole 2, a part of the limiting block is arranged through the through hole 2, a mounting arm is installed on the mounting block 2, a driving mechanism 3 is installed on the mounting arm, the driving mechanism 3 is drivingly connected to a movable rod, a part of the movable rod is located in the through hole 1, a driving inclined surface is arranged in the middle position of the movable rod near one side of the limiting block, a mounting groove is arranged in the mounting seat 2 at a position above the limiting block, a fixing pin is connected to the limiting block, a spring is connected to the fixing pin, and the other end of the spring is connected to the inner wall of the mounting groove.

[0008] Furthermore, a limiting groove is provided on one side of the movable rod away from the limiting block, the limiting groove is arranged along the axial direction of the movable rod, a limiting pin is installed on the second mounting block, and a part of the limiting pin passes through the second mounting block and extends into the limiting groove.

[0009] Furthermore, the clamping mechanism includes a mounting plate installed on the machine platform, a side of the mounting plate close to the limiting mechanism is connected to a support arm, a rotating rod is hinged on the support arm, a pressure block is installed at one end of the rotating rod close to the limiting mechanism, and the pressure block is located above the limiting mechanism. The clamping mechanism also includes a lifting mechanism, which drives the end of the rotating rod connected away from the limiting mechanism.

[0010] Furthermore, a plurality of supporting mechanisms are arranged on the machine platform, and the supporting mechanisms include a base installed on the machine platform, on which a sliding seat 1 is slidably arranged, and a sliding seat 2 is slidably arranged on the upper part of the sliding seat 1, and the upper end of the sliding seat 2 is connected to the bottom surface of the movable plate, and the sliding directions of the sliding seat 1 and the sliding seat 2 are perpendicular to each other.

[0011] Furthermore, a plurality of sections are arranged on the outer periphery of the positioning shaft.

[0012] Furthermore, the pneumatic measuring instrument comprises a plurality of supporting shafts, which are arranged around the positioning shaft. The pneumatic measuring instrument further comprises a limiting shaft, which can pass through the hole on the cylinder.

[0013] The beneficial effect of the present invention is that the cylinder head can be moved on the cylinder to adjust the position of the cylinder head so that the centers of the two circles are opposite to each other up and down, thereby completing the centering process before the cylinder head is installed on the cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 A schematic diagram of the structure of a centering device for assembling a compressor in this embodiment;

[0015] Figure 2 is a structural schematic diagram of the base station in this embodiment;

[0016] Figure 3 This is a schematic diagram of the installation of the displacement mechanism 1 and the displacement mechanism 2 in this embodiment;

[0017] Figure 4 A structural schematic diagram of the tightening mechanism in this embodiment;

[0018] Figure 5 It is a partial structural schematic diagram of the tightening mechanism in this embodiment;

[0019] Figure 6 Schematic diagram of a structure of the limiting mechanism in this embodiment;

[0020] Figure 7 is a cross-sectional view of the limiting mechanism in this embodiment;

[0021] Figure 8 is a cross-sectional view of the limiting mechanism in this embodiment;

[0022] Fig. 9 is a cross-sectional view of the support member in this embodiment;

[0023] Fig.10 is a structural schematic diagram of a support member in this embodiment;

[0024] Fig.11 Schematic diagram of driving the moving plate in this embodiment.

[0025] 1. Table; 2. Protective cover; 3. Opening 1; 4. Opening 2; 5. Displacement mechanism 1; 6. Displacement mechanism 2; 7. Moving plate; 8. Limiting mechanism; 9. Clamping mechanism; 10. Clamping member; 11. Mounting plate; 12. Support arm; 13. Rotating rod; 14. Lifting mechanism; 15. Pressing block; 16. Adjusting handle 1; 17. Adjusting screw rod 1; 18. Guide seat 1; 19. Moving block 1; 20. Adjusting handle 2; 21. Transmission rod; 22. Commutator; 23. Adjusting screw rod 2; 24. Guide seat 2; 25. Moving block 2; 26. Transmission frame 1; 27. Transmission frame 2; 28. Support member; 29. ​​Base; 30. Sliding seat 1; 31. Sliding seat 2; 32. Mounting seat 1; 33. Sliding block; 34. Mounting block 1 ;35. Tightening block;36. Fixing plate;37. Extension plate;38. Driving mechanism one;39. Trigger mechanism;40. Driving mechanism two;41. Locking block;42. Locking slope;43. Fixing block;44. Roller;45. Base;46. Mounting block two;47. Mounting seat two;48. Mounting arm;49. Driving mechanism three;50. Limiting block;51. Through hole one;52. Movable groove;53. Through hole two;54. Movable rod;55. Driving slope;56. Limiting groove;57. Limiting pin;58. Fixing pin;59. Spring;60. Mounting seat three;61. Pneumatic measuring instrument;62. Positioning shaft;63. Measuring shaft;64. Support shaft;65. Limiting shaft;66. Section;67. Cylinder;68. Cylinder head;69. Mounting groove. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-Figure 11As shown, a centering device for compressor assembly includes a machine table 1, on which a support member 28, a displacement mechanism 1 5, a displacement mechanism 2 6 and a limit mechanism 8 are installed. The displacement mechanism 1 5 and the displacement mechanism 2 6 are drivingly connected to a movable plate 7, and the displacement mechanism 1 5 and the displacement mechanism 2 6 are perpendicular to the driving direction of the movable plate 7. A tightening mechanism 9 is respectively installed on the left and right sides of the upper part of the movable plate 7, and the tightening mechanism 9 is drivingly connected to a tightening member 10. The tightening mechanism 9 includes a mounting seat 1 32, and a fixed plate 36 is installed on the upper part of the mounting seat 1 32. An extension plate 37 is installed on the outer side of the fixed plate 36, and a driving mechanism 1 38 is arranged on the extension plate 37. The driving mechanism 1 38 is a cylinder or a hydraulic cylinder. A sliding block 33 is slidably disposed on the mounting seat 1 32, and a driving mechanism 1 38 drives and connects the sliding block 33. The abutting member 10 includes a mounting block 1 34 mounted on the sliding block 33, and a abutting block 35 is mounted on the inner side of the mounting block 1 34. The total number of abutting blocks 35 on the mounting blocks 1 34 on both sides is not less than three. The three abutting blocks 35 can ensure the clamping of the cylinder head 68 and will not deviate when adjusting the position of the cylinder head 68. The installation position of the abutting block 35 on the mounting block 1 34 is adjustable to adapt to the clamping of cylinder heads 68 with different diameters.

[0028] The outer side of the sliding block 33 is connected to a trigger mechanism 39, on which an adjustment screw is installed, and a trigger that matches the adjustment screw is provided on the mounting seat 1 32. When the driving mechanism 1 38 drives the sliding block 33 to move, the adjustment screw on the trigger mechanism 39 can contact the trigger on the mounting seat 1 32, indicating that the sliding block 33 has moved into place, so that the driving mechanism 1 38 stops running. By turning the adjustment screw, the installation position of the adjustment screw on the trigger mechanism 39 can be adjusted, so that when the adjustment screw contacts the trigger, the abutting block 35 on the sliding block 33 can just abut against the outer wall of the cylinder head 68, and the driving mechanism 1 38 can be stopped in time to avoid excessive pressure on the cylinder head 68 by the abutting block 35 and damage to the cylinder head 68.

[0029] The limiting mechanism 8 includes a mounting seat 60, on which a pneumatic measuring instrument 61 is installed. The pneumatic measuring instrument 61 includes a positioning shaft 62, on the upper part of which a measuring shaft 63 is connected. The cylinder 67 is sleeved on the positioning shaft 62, and the cylinder 67 is centered by the positioning shaft 62. The cylinder cover 68 is placed on the cylinder 67, and the measuring shaft 63 passes through the center hole on the cylinder cover 68.

[0030] The cylinder 67 is sleeved on the positioning shaft 62, and then the limiting block 50 of the limiting mechanism 8 abuts against the cylinder 67, thereby completing the limiting fixation of the cylinder 67. The cylinder head 68 is placed on the cylinder 67. The driving mechanism 1 38 drives the sliding block 33 to move inward, so that the tightening block 35 is close to the cylinder head 68 so that the tightening block 35 abuts against the outer periphery of the cylinder head 68. Several tightening blocks 35 work together to clamp and fix the cylinder head 68. The position of the movable plate 7 is adjusted by the displacement mechanism 1 5 and the displacement mechanism 2 6, thereby driving the tightening mechanism 9 to move to complete the adjustment of the position of the cylinder head 68. Since the position of the cylinder 67 on the pneumatic measuring instrument 61 is fixed, the distance between the side wall of the center hole of the cylinder head 68 and the outer wall of the measuring shaft 63 can be detected by the pneumatic measuring instrument 61, so as to detect the position of the center of the center hole of the cylinder head 68 as a basis for adjusting the position of the cylinder head 68. The cylinder cover 68 is adjusted to the right position so that the center of the center hole of the cylinder cover 68 is opposite to the center of the cylinder 67 to meet the assembly requirements. Then the two are fixed relatively by bolts.

[0031] The fixed plate 36 is provided with a second driving mechanism 40, which is connected to a locking block 41. A locking slope 42 is provided on the inner side of the locking block 41, which gradually tilts outward from the direction close to the second driving mechanism 40 to the direction away from the second driving mechanism 40. A fixed block 43 is provided on the outer side of the sliding block 33, and a roller 44 is rotatably provided on the fixed block 43. The sliding block 33 moves into position, that is, after the pressing block 35 presses against the outer periphery of the cylinder head 68. The second driving mechanism 40 drives the locking block 41 to move toward the sliding block 33. As the locking block 41 moves forward, the locking slope 42 can press against the roller 44 and press tightly, thereby preventing the sliding block 33 from retreating, ensuring that the pressing block 35 can clamp the cylinder head 68, and the cylinder head 68 will not loosen during the adjustment process of the cylinder head 68. The second driving mechanism 40 is a cylinder or a hydraulic cylinder.

[0032] The limiting mechanism 8 includes a base 45 installed on the machine 1, a mounting block 46 is arranged on the upper part of the base 45, a mounting seat 47 is connected to the mounting block 46, a through hole 51 is opened in the mounting block 46, a movable groove 52 is opened in the mounting seat 47, a limiting block 50 is arranged in the movable groove 52, a through hole 53 is opened on the side of the mounting block 46, the movable groove 52 is connected with the through hole 51 through the through hole 53, a part of the limiting block 50 is arranged through the through hole 53, a mounting arm 48 is installed on the mounting block 46, a driving mechanism 3 49 is installed on the mounting arm 48, the driving mechanism 3 49 is connected to the movable rod 54, a part of the movable rod 54 is located in the through hole 1 51, a driving inclined surface 55 is arranged in the middle position of the movable rod 54 close to the limiting block 50, and the driving inclined surface 55 is inclined in the direction away from the limiting block 50 from the direction close to the driving mechanism 3 49 to the direction away from the driving mechanism 3 49.

[0033] A mounting groove 69 is provided in the mounting seat 2 47 at a position above the limit block 50, a fixing pin 58 is connected to the limit block 50, a spring 59 is connected to the fixing pin 58, and the other end of the spring 59 is connected to the inner wall of the mounting groove 69. Under the action of the spring 59, the front end of the limit block 50 abuts against the rear side of the movable rod 54. When the front end of the limit block 50 contacts the outer periphery of the movable rod 54 at the maximum diameter, the rear end of the limit block 50 is located at the limit position, at which time the rear end of the limit block 50 can abut against the outer wall of the cylinder 67, thereby cooperating with the positioning shaft 62 inside and outside to completely fix the cylinder 67.

[0034] The driving mechanism three 49 drives the movable rod 54 to move in the through hole one 51. Due to the setting of the driving inclined surface 55, when the front end of the limit block 50 contacts the driving inclined surface 55, the rear end of the limit block 50 will move forward and break away from the contact with the cylinder 67, thereby loosening the cylinder 67 so that the cylinder 67 can be removed from the positioning shaft 62.

[0035] A limiting groove 56 is provided on one side of the movable rod 54 away from the limiting block 50. The limiting groove 56 is arranged along the axial direction of the movable rod 54. A limiting pin 57 is installed on the second mounting block 46. A part of the limiting pin 57 passes through the second mounting block 46 and extends into the limiting groove 56. The movement of the movable rod 54 is limited by the cooperation between the limiting pin 57 and the limiting groove 56.

[0036] The displacement mechanism 15 includes an adjusting screw rod 17, a moving block 19 is installed on the adjusting screw rod 17, an adjusting handle 16 is connected to the front end of the adjusting screw rod 17, a guide seat 18 is installed on the machine 1, and the moving block 19 is slidably set on the guide seat 18, and the guide seat 18 is set along the front and rear directions. The displacement mechanism 26 includes a transmission rod 21, a commutator 22 and an adjusting screw rod 23, the transmission rod 21 and the adjusting screw rod 23 are connected through the commutator 22, the front end of the transmission rod 21 is connected to the adjusting handle 20, a moving block 25 is installed on the adjusting screw rod 23, a guide seat 24 is installed on the machine 1, the moving block 25 is slidably set on the guide seat 24, and the moving block 25 is set along the left and right directions. The lower part of the movable plate 7 is connected to a transmission frame 1 26 and a transmission frame 2 27. The movable block 19 is located in the transmission frame 1 26. The front and rear ends of the movable block 19 abut against the inner wall of the transmission frame 1 26. A gap is left between the left and right ends of the movable block 19 and the inner wall of the transmission frame 1 26. The movable block 25 is located in the transmission frame 27. The left and right ends of the movable block 25 abut against the inner wall of the transmission frame 27. A gap is left between the front and rear ends of the movable block 25 and the inner wall of the transmission frame 27. By adjusting the handle 16 to drive the adjusting screw rod 17 to rotate, when the moving block 19 moves forward and backward, the front and rear ends of the moving block 19 abut against the inner wall of the transmission frame 1 26, so that the moving block 19 drives the moving plate 7 to move forward and backward through the transmission frame 1 26, and there is a gap between the front and rear ends of the moving block 25 and the inner wall of the transmission frame 2 27. Since the position of the moving plate 7 needs to be adjusted less and only needs to be fine-tuned, the setting of the gap makes the moving block 25 not affect the movement of the moving plate 7. Similarly, when the moving block 25 drives the moving plate 7 to move through the transmission frame 2 27, the moving block 19 will not affect the movement of the moving plate 7. The displacement mechanism 1 5 and the displacement mechanism 2 6 work together to adjust the position of the moving plate 7.

[0037] A protective cover 2 is provided on the upper part of the machine 1. An opening 3 is provided on the front side of the protective cover 2 for the first adjustment handle 16 and the second adjustment handle 20 to pass through. An opening 2 4 is provided on the upper part of the protective cover 2 for the limit mechanism 8 to be exposed.

[0038] The device also includes a clamping mechanism installed on the machine 1, the clamping mechanism includes a mounting plate 11 installed on the machine 1, a support arm 12 is connected to the side of the mounting plate 11 close to the limiting mechanism 8, a rotating rod 13 is hinged on the support arm 12, a pressing block 15 is installed at one end of the rotating rod 13 close to the limiting mechanism 8, and the pressing block 15 is located above the limiting mechanism 8. The clamping mechanism also includes a lifting mechanism 14, and the lifting mechanism 14 drives the end of the rotating rod 13 away from the limiting mechanism 8. The lifting mechanism 14 is a cylinder, the cylinder is hinged on the machine 1, and the upper end of the piston rod of the cylinder is hinged to the end of the rotating rod 13 away from the limiting mechanism 8. After completing the centering adjustment of the cylinder head 68, the lifting mechanism 14 drives the hinged end of the rotating rod 13 to rise, so that the rotating rod 13 drives the pressing block 15 to descend, and the pressing block 15 is pressed on the cylinder head 68 to further fix the position of the cylinder head 68. Then, the cylinder 67 and the cylinder head 68 are connected by bolts to fix the two.

[0039] A number of supporting mechanisms are arranged on the machine 1, and the supporting mechanisms include a base 29 installed on the machine 1, a sliding seat 30 is slidably arranged on the base 29, a sliding seat 2 31 is slidably arranged on the upper part of the sliding seat 1 30, the upper end of the sliding seat 2 31 is connected to the bottom surface of the movable plate 7, and the sliding directions of the sliding seat 1 30 and the sliding seat 2 31 are perpendicular to each other. The supporting mechanism is used to provide effective support when the movable plate 7 moves.

[0040] A plurality of cut surfaces 66 are arranged on the periphery of the positioning shaft 62, and the cut surfaces 66 are evenly distributed on the periphery of the positioning shaft 62. The arrangement of the cut surfaces 66 makes it possible for the periphery of the positioning shaft 62 and the inner wall of the cylinder 67 to not fit completely together but to have a gap. The remaining portion of the periphery of the positioning shaft 62 can still rest against the inner wall of the cylinder 67 to achieve positioning, and the gap makes it convenient for the cylinder 67 to be mounted on or removed from the positioning shaft 62.

[0041] The pneumatic measuring instrument 61 includes a plurality of supporting shafts 64 , which are arranged around the positioning shaft 62 . The supporting shafts 64 can support the cylinder 67 . The pneumatic measuring instrument 61 also includes a limiting shaft 65 , which can pass through the limiting hole on the cylinder 67 to position the cylinder 67 .

[0042] The above is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions under the concept of the present invention belong to the protection scope of the present invention. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the present invention should also be regarded as the protection scope of the present invention.

Claims

1. A centering device for compressor assembly, characterized in that: The invention comprises a machine platform (1), on which a support member (28), a displacement mechanism 1 (5), a displacement mechanism 2 (6) and a limit mechanism (8) are installed, wherein the displacement mechanism 1 (5) and the displacement mechanism 2 (6) are drivingly connected to a movable plate (7), and a clamping mechanism (9) is respectively installed on the left and right sides of the upper part of the movable plate (7), and the clamping mechanism (9) is drivingly connected to a clamping member (10), and the clamping mechanism (9) comprises a mounting seat 1 (32), and a fixing plate (36) is installed on the upper part of the mounting seat 1 (32), and an extension plate (37) is installed on the outer side of the fixing plate (36), and a driving member (10) is provided on the extension plate (37). The driving mechanism (38) comprises a first mounting seat (32) on which a sliding block (33) is slidably arranged, the first driving mechanism (38) drives the sliding block (33), the abutting member (10) comprises a first mounting block (34) mounted on the sliding block (33), a abutting block (35) is mounted on the inner side of the first mounting block (34), the limiting mechanism (8) comprises a third mounting seat (60), a pneumatic measuring instrument (61) is mounted on the third mounting seat (60), the pneumatic measuring instrument (61) comprises a positioning shaft (62), the upper part of the positioning shaft (62) is connected to a measuring shaft (63); the limiting mechanism (8) also comprises a mounting seat (60) mounted on the machine platform. (1) on a base (45), the base (45) is provided with a second mounting block (46) on the upper part, the second mounting block (46) is connected to a second mounting seat (47), the second mounting block (46) is provided with a first through hole (51), the second mounting seat (47) is provided with a movable groove (52), a limit block (50) is provided in the movable groove (52), a second through hole (53) is provided on the side of the second mounting block (46), the movable groove (52) is connected to the first through hole (51) through the second through hole (53), a part of the limit block (50) is provided through the second through hole (53), and a mounting block (46) is provided with a mounting An arm (48), a driving mechanism three (49) is installed on the mounting arm (48), the driving mechanism three (49) is drivingly connected to a movable rod (54), a portion of the movable rod (54) is located in the through hole one (51), a driving inclined surface (55) is provided at a middle position of the movable rod (54) near a side of the limit block (50), a mounting groove (69) is provided in the mounting seat two (47) at a position above the limit block (50), a fixing pin (58) is connected to the limit block (50), a spring (59) is connected to the fixing pin (58), and the other end of the spring (59) is connected to the inner wall of the mounting groove (69);The machine also comprises a clamping mechanism installed on the machine platform (1), the clamping mechanism comprising a mounting plate (11) installed on the machine platform (1), a side of the mounting plate (11) close to the limiting mechanism (8) is connected to a support arm (12), a rotating rod (13) is hingedly connected to the support arm (12), a pressing block (15) is installed at one end of the rotating rod (13) close to the limiting mechanism (8), the pressing block (15) is located above the limiting mechanism (8), and the clamping mechanism also comprises a lifting mechanism (14), the lifting mechanism (14) drives the end of the rotating rod (13) away from the limiting mechanism (8). ; 2. A compressor assembly centering device according to claim 1, characterized in that: The fixing plate (36) is provided with a second driving mechanism (40), the second driving mechanism (40) is drivingly connected to a locking block (41), an inner side of the locking block (41) is provided with a locking inclined surface (42), and an outer side of the sliding block (33) is provided with a fixing block (43), and a roller (44) is rotatably provided on the fixing block (43).

3. A compressor assembly centering device according to claim 1, characterized in that: A limiting groove (56) is provided on a side of the movable rod (54) away from the limiting block (50), and the limiting groove (56) is arranged along the axial direction of the movable rod (54). A limiting pin (57) is installed on the second mounting block (46), and a part of the limiting pin (57) passes through the second mounting block (46) and extends into the limiting groove (56).

4. A compressor assembly centering device according to claim 1, characterized in that: The machine platform (1) is provided with a plurality of supporting mechanisms, the supporting mechanisms comprising a base (29) mounted on the machine platform (1), a sliding seat (30) being slidably provided on the base (29), a sliding seat (31) being slidably provided on the upper part of the sliding seat (30), the upper end of the sliding seat (31) being connected to the bottom surface of the movable plate (7), and the sliding directions of the sliding seat (30) and the sliding seat (31) being perpendicular to each other.

5. A compressor assembly centering device according to claim 1, characterized in that: The outer periphery of the positioning shaft (62) is provided with a plurality of cut surfaces (66).

6. A compressor assembly centering device according to claim 1, characterized in that: The pneumatic measuring instrument (61) comprises a plurality of supporting shafts (64) which are arranged around a positioning shaft (62). The pneumatic measuring instrument (61) further comprises a limiting shaft (65) which can pass through a limiting hole on a cylinder (67).

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