Centering adjusting device for main motor shaft and crankshaft of supercharger

Through the combined design of the guide plate and the heightening plate, the precise alignment of the main motor shaft and the crankshaft of the booster is achieved, solving the problem of low alignment efficiency in the prior art, and improving assembly efficiency and accuracy.

CN223075987UActive Publication Date: 2025-07-08赖和群
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422301866.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-09-20
Publication Date
2025-07-08
Estimated Expiration
2034-09-20

AI Technical Summary

Technical Problem

In the prior art, when the supercharger spindle and crankshaft are centered, it is difficult to accurately align, resulting in low assembly efficiency, requiring repeated adjustment of the gasket, and the supercharger is of a large weight and requires the crane operation.

Method used

An adjustment device including a guide plate, a height increase plate and a limiting member is designed. By moving the height increase plate in the inclined surface of the guide plate, the height adjustment of the booster body in the vertical direction is realized. Combined with the limiting member, the support plate is prevented from moving horizontally, and ensuring accurate alignment of the main motor shaft and the crankshaft.

Benefits of technology

The accuracy and assembly efficiency of the centering of the main motor shaft and crankshaft of the supercharger are improved, the steps of repeatedly adjusting the gaskets are reduced, and the operation difficulty and time are reduced.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223075987U_ABST
    Figure CN223075987U_ABST
Patent Text Reader

Abstract

The utility model discloses a supercharger main motor shaft and crankshaft centering adjusting device which comprises a supporting frame and a supercharger body, a supporting plate is arranged at the bottom of the supercharger body, and at least one adjusting piece is arranged between the supporting frame and the supporting plate. The adjusting part comprises a guide plate, a heightening plate and a limiting part, the guide plate is detachably connected with the supporting frame, the heightening plate is located between the guide plate and the supporting frame, the contact faces of the heightening plate and the guide plate are provided with inclined faces, one end of the limiting part is connected with the supporting frame, and the other end of the limiting part is connected with the supporting frame. The other end of the limiting piece is connected with the supporting plate in a sliding mode. According to the utility model, the guide plate moves on the inclined surface of the heightening plate, so that the height of the supercharger body in the vertical direction is adjusted, and a main motor shaft of the supercharger body and a crankshaft can be accurately centered.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The utility model relates to the technical field of superchargers, in particular to an alignment adjusting device for the main motor shaft and the crankshaft of a supercharger. Background Art

[0002] When installing a supercharger, it is necessary to ensure that its drive shaft (usually connected to the crankshaft of a motor or engine) is aligned with the main shaft of the supercharger to ensure a correct connection and smooth operation between the two. Alignment is an important step in mechanical installation, which helps to reduce vibration, noise, wear and failures, and improve the efficiency and lifespan of the system.

[0003] Currently, when aligning the main shaft of a supercharger with the crankshaft, when the main shaft of the supercharger and the crankshaft are not at the same height, usually shims are placed at the bottom of the supercharger to adjust the position of the main shaft. However, due to the heavy weight of the supercharger, a hoist is required to lift the supercharger, and then shims are placed under the support frame of the supercharger. Moreover, the placed shims cannot ensure that the main shaft of the supercharger can be accurately aligned with the crankshaft. Often, shims of different thicknesses need to be repeatedly placed to ensure the accurate alignment of the main shaft of the supercharger with the crankshaft, resulting in low assembly efficiency of the supercharger. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies in the prior art. The purpose is to provide an alignment adjusting device for the main motor shaft and the crankshaft of a supercharger. By moving the position of the guide plate on the inclined surface of the height increasing plate, the height of the supercharger body in the vertical direction is adjusted, ensuring that the main motor shaft of the supercharger body can be accurately aligned with the crankshaft.

[0005] The utility model is realized by the following technical solutions:

[0006] An alignment adjusting device for the main motor shaft and the crankshaft of a supercharger, including a support frame and a supercharger body. A support plate is arranged at the bottom of the supercharger body, and at least one adjusting member is arranged between the support frame and the support plate;

[0007] The adjusting member includes a guide plate, a height increasing plate, and a limiting member. The guide plate is detachably connected to the support frame. The height increasing plate is located between the guide plate and the support frame, and inclined surfaces are provided on the contact surfaces of the height increasing plate and the guide plate. One end of the limiting member is connected to the support frame, and the other end of the limiting member is slidably connected to the support plate in the vertical direction.

[0008] Further, there are four adjusting members, and the four adjusting members are respectively distributed at the four corners of the support frame.

[0009] Further, a plurality of weight reducing holes are provided on both sides of the support frame.

[0010] Further, a rectangular hole is provided at the top of the support frame;

[0011] One end of the guide plate is provided with a fixing plate, at least one clamping member is provided on the fixing plate, a protrusion is provided at the other end of the guide plate, the protrusion is located in the rectangular hole, and the clamping member is used to fix the guide plate on the support frame.

[0012] Further, the clamping member includes a threaded rod and a first nut, the threaded rod is connected to the fixing plate by threads, the first nut is sleeved on the end of the threaded rod away from the support frame, a first gasket is also sleeved on the threaded rod, and the first gasket is located between the fixing plate and the first nut.

[0013] Further, a clamping section is further provided at the end of the threaded rod away from the support frame.

[0014] Further, the limiting member includes a bolt and a second nut, the bolt sequentially passes through the support seat and the support plate vertically and then is connected to the second nut;

[0015] A second gasket is also sleeved on the bolt, and the second gasket is located between the second nut and the support plate.

[0016] Further, strip-shaped openings are provided on both the heightening plate and the guide plate, and a part of the bolt is located in the strip-shaped opening.

[0017] Further, it further includes a cross bar and a third nut, a through hole with an inner diameter larger than the outer diameter of the cross bar is provided on the fixing plate, one end of the cross bar is connected to the heightening plate, and the other end passes through the through hole and is threadedly connected to the third nut.

[0018] Further, a blind hole is further provided at the end of the cross bar away from the heightening plate, and a first elastic member and an adjusting rod are provided in the blind hole;

[0019] A groove is provided on the side wall of the adjusting rod, a connection hole communicating with the blind hole is further provided on the side wall of the cross bar, and a locking rod for inserting into the groove is provided in the connection hole;

[0020] An annular groove is further provided on the inner wall of the connection hole, a second elastic member is provided in the annular groove, the second elastic member is sleeved on the locking rod, and one end is connected to the locking rod.

[0021] Compared with the prior art, the present utility model has the following advantages and beneficial effects:

[0022] The utility model can realize the height adjustment of the supercharger body by adjusting the position of the heightening plate arranged on the inclined surface of the guiding plate, and can meet the adjustment of the supercharger body at any height in the vertical direction by the cooperation between the guiding plate and the inclined surface of the guiding plate. Compared with the traditional method of using gaskets, the centering efficiency of the main motor shaft and the crankshaft of the supercharger body is improved. Brief Description of the Drawings

[0023] The drawings described herein are used to provide a further understanding of the embodiments of the present utility model, form a part of this application, and do not constitute a limitation to the embodiments of the present utility model. In the drawings:

[0024] Figure 1 is a schematic structural diagram of the present utility model;

[0025] Figure 2 is the present utility model Figure 1 is an enlarged structural diagram of part A in the present utility model;

[0026] Figure 3 is a schematic structural diagram of the adjusting member of the present utility model;

[0027] Figure 4 is a schematic structural diagram of the guiding plate of the present utility model;

[0028] Figure 5 is a schematic structural diagram of the heightening plate of the present utility model;

[0029] Figure 6 is the present utility model Figure 5 is an enlarged structural diagram of part B in the present utility model;

[0030] Figure 7 is a top view of the support frame of the present utility model.

[0031] Marks in the drawings and corresponding component names:

[0032] 1. Supercharger body; 2. Support plate; 3. Support frame; 4. Weight reduction hole; 5. Heightening plate; 6. Guiding plate; 7. Cross bar; 8. Clamping member; 9. Second nut; 10. Second gasket; 11. Bolt; 12. Strip-shaped opening; 14. Fixed plate; 15. Protrusion; 17. Threaded rod; 18. First nut; 19. First gasket; 20. Clamping section; 21. Third nut; 22. First elastic member; 23. Adjusting rod; 24. Third gasket; 26. Locking rod. Detailed Embodiments

[0033] In order to make the purpose, technical solutions and advantages of the present utility model clearer and more understandable, the present utility model will be further described in detail below in combination with embodiments and drawings. The illustrative embodiments and descriptions thereof of the present utility model are only used to explain the present utility model and do not constitute a limitation to the present utility model.

[0034] Embodiment

[0035] As Figures 1 to 7 shown, the utility model includes a support frame 3 and a supercharger body 1. A support plate 2 is arranged at the bottom of the supercharger body 1. At least one adjusting member is arranged between the support frame 3 and the support plate 2. The adjusting member includes a guide plate 6, a heightening plate 5 and a limiting member. The guide plate 6 is detachably connected to the support frame 3. The heightening plate 5 is located between the guide plate 6 and the support frame 3. Bevels are arranged on the contact surfaces of the heightening plate 5 and the guide plate 6. One end of the limiting member is connected to the support frame 3, and the other end of the limiting member is slidably connected to the support plate 2 in the vertical direction.

[0036] In the prior art, when installing the supercharger body 1, it is necessary to align the main motor shaft of the supercharger body 1 with the crankshaft. However, during the installation process, due to the limitation of the installation site, the axis of the main motor shaft of the supercharger body 1 and the axis of the crankshaft are not at the same height. The traditional method is to place gaskets with different thicknesses at the bottom of the support frame 3 of the supercharger body 1 to adjust the height of the axis of the main motor shaft so that it is at the same height as the axis of the crankshaft. However, since the supercharger body 1 is relatively heavy, a hoist is often required to lift the supercharger body 1 as a whole and then place the gaskets. And it is necessary to repeatedly place gaskets with different thicknesses to adjust the axis of the main motor shaft to match the crankshaft, which results in a low installation efficiency of the supercharger body 1. For this reason, an adjusting member is arranged between the existing support frame 3 and the support plate 2 at the bottom of the supercharger body 1 in this technical solution. Among them, the adjusting member includes a guide plate 6, a heightening plate 5 and a limiting member. When installing the supercharger body 1, when it is necessary to adjust the height of the main motor shaft of the supercharger body 1, move the heightening plate 5 arranged between the guide plate 6 and the support plate 2 so that the bevel surface of the heightening plate 5 moves along the bevel surface of the guide plate 6. By adjusting the heightening plate 5 to different positions on the bevel surface of the guide plate 6, the height of the support plate 2 in the vertical direction can be adjusted, thereby ensuring that the axis of the main motor shaft of the supercharger body 1 can be accurately aligned with the axis of the crankshaft. And since the height of the supercharger body 1 is realized by the bevel surfaces of the heightening plate 5 and the guide plate 6, therefore, by moving the heightening plate 5 in different directions on the bevel surface of the guide plate 6, the supercharger body 1 can be adjusted to any height, improving the installation efficiency of the supercharger body 1.

[0037] Meanwhile, to prevent the friction between the height increasing plate 5 and the support plate 2 from causing a change in the horizontal position of the support plate 2 during the movement of the height increasing plate 5 on the inclined surface of the guide plate 6, which may lead to the risk of the supercharger body 1 falling off the support frame 3, a limiting member is further provided. The provided limiting member is slidably connected to the support plate 2, enabling the support plate 2 to move vertically along the limiting member. Therefore, when the height increasing plate 5 is used to move on the guide plate 6, the provided limiting member can limit the movement of the support plate 2 in the horizontal direction while ensuring that the support plate 2 can move vertically to change the height of the supercharger body 1, further improving the assembly accuracy of the main motor shaft and the crankshaft of the supercharger body 1.

[0038] There are four adjusting members, and the four adjusting members are respectively distributed at the four corners of the support frame 3.

[0039] In this embodiment, in order to improve the accuracy of adjusting the height of the supercharger body 1, adjusting members are provided at the positions near the four corners of the top of the support frame 3. In this way, the four adjusting members can not only accurately adjust the height of the supercharger body 1, but also adjust the inclination angle of the supercharger body 1 to meet the installation requirements in different environments.

[0040] A plurality of weight reduction holes 4 are provided on both sides of the support frame 3.

[0041] In this embodiment, in order to reduce the overall weight of the supercharger body 1, weight reduction holes 4 that communicate with each other are provided on both sides of the rectangular support frame 3. The provided weight reduction holes 4 can, on the one hand, reduce the overall weight of the support frame 3, and on the other hand, facilitate the routing of other pipelines by using the provided weight reduction holes 4.

[0042] A rectangular hole is provided at the top of the support frame 3; one end of the guide plate 6 is provided with a fixing plate 14, at least one clamping member is provided on the fixing plate 14, and a protrusion 15 is provided at the other end of the guide plate 6. The protrusion 15 is located in the rectangular hole, and the clamping member is used to fix the guide plate 6 on the support frame 3.

[0043] In this embodiment, in order to ensure that the provided guide plate 6 can be detachably connected to the support frame 3, a rectangular hole is provided at the top of the support frame 3. The provided rectangular hole communicates with the weight reduction holes 4. In this way, when installing the guide plate 6, the guide plate 6 is horizontally placed on the top of the support frame 3, and the protrusion 15 at one end of the guide plate 6 is in contact with the inner wall of the rectangular hole. Finally, the provided clamping member is used in cooperation with the provided protrusion 15 to stably fix the guide plate 6 on the support frame 3.

[0044] The clamping member includes a threaded rod 17 and a first nut 18. The threaded rod 17 is connected to the fixed plate 14 by threads. The first nut 18 is sleeved on the end of the threaded rod 17 away from the support frame 3. A first gasket 19 is also sleeved on the threaded rod 17, and the first gasket 19 is located between the fixed plate 14 and the first nut 18.

[0045] In this embodiment, in order to ensure that the set clamping member can stably fix the guide plate 6 on the support frame 3 under the combined action of the mating protrusion 15, the support member includes a threaded rod 17 and a first nut 18. After the guide plate 6 is placed on the support frame 3, since the threaded rod 17 is connected to the fixed plate 14 by threads, when the threaded rod 17 is rotated, the threaded rod 17 can move upward along the side wall of the support frame 3, and finally, with the cooperation of the protrusion 15, the guide plate 6 is stably fixed on the support frame 3.

[0046] In order to prevent the threaded rod 17 from loosening, a first nut 18 and a first gasket 19 are also provided on the threaded rod 17.

[0047] A clamping section 20 is also provided at the end of the threaded rod 17 away from the support frame 3.

[0048] In this embodiment, in order to facilitate the rotation of the threaded rod 17, a clamping section 20 is also provided at the end of the threaded rod 17 outside the support frame 3. When the threaded rod 17 needs to be rotated, a pliers tool is used to clamp the clamping section 20 so as to rotate the threaded rod 17. This design avoids damage to the threads caused by the action of the pliers on the threaded rod 17.

[0049] The limiting member includes a bolt 11 and a second nut 9. The bolt vertically penetrates through the support frame 3 and the support plate 2 in sequence and is connected to the second nut 9. A second gasket 10 is also sleeved on the bolt 11, and the second gasket 10 is located between the second nut 9 and the support plate 2.

[0050] In this embodiment, in order to avoid the situation that when the height of the support plate 2 is adjusted by using the heightening plate 5, the support plate 2 is displaced under the action of friction force, resulting in the booster body 1 falling off the support frame 3, the limiting member includes a bolt 11 and a second nut 9. An assembly hole for installing the bolt 11 is provided on the support plate 2, and the inner diameter of the assembly hole is larger than the outer diameter of the bolt 11. In this way, when the inclination angle of the booster body 1 needs to be adjusted, the set limiting member can ensure that the support plate 2 can tilt on the bolt 11, and at the same time, the set bolt 11 can prevent the booster body 1 from falling off the support frame 3; after the position of the booster body 1 is adjusted, the second nut 9 and the second gasket 10 are installed on the bolt 11 and the second nut 9 is tightened, so as to ensure that the support plate 2 is stably fixed on the support frame 3.

[0051] Both the height increasing plate 5 and the guiding plate 6 are provided with strip-shaped openings 12, and a part of the bolt 11 is located within the strip-shaped openings 12.

[0052] In this embodiment, in order to ensure that the height increasing plate 5 can move along the inclined plane direction of the guiding plate 6 and prevent the height increasing plate 5 from shifting on the guiding plate 6, strip-shaped openings 12 for placing the bolts 11 are provided on both the height increasing plate 5 and the guiding plate 6. The width of the strip-shaped openings 12 is consistent with the outer diameter of the bolts 11. In this way, under the constraint of the bolts 11 within the strip-shaped openings 12, it is ensured that the height increasing plate 5 can smoothly move along the inclined plane of the guiding plate 6, and at the same time, the situation where the height increasing plate 5 falls off the guiding plate 6 is avoided.

[0053] It further includes a cross bar 7 and a third nut 21. A through hole with an inner diameter larger than the outer diameter of the cross bar 7 is provided on the fixed plate 14. One end of the cross bar 7 is connected to the height increasing plate 5, and the other end passes through the through hole and is threadedly connected to the third nut 21. A third gasket 24 is also provided on the cross bar 7.

[0054] Since the provided height increasing plate 5 is located between the support plate 2 and the guiding plate 6, its spatial position is restricted to a certain extent. Therefore, in this embodiment, in order to smoothly adjust the position of the height increasing plate 5 on the inclined plane of the guiding plate 6, a cross bar 7 connected to the height increasing plate 5 is also provided on the fixed plate 14. In this way, by pulling the cross bar 7 horizontally, the position of the height increasing plate 5 on the guiding plate 6 is adjusted.

[0055] At the same time, since the provided cross bar 7 is fixedly connected to the height increasing plate 5, when the cross bar 7 pulls the height increasing plate 5 to move along the inclined plane of the guiding plate 6, the height of the height increasing plate 5 will change. In order to ensure that the cross bar 7 can also change in the vertical direction, a through hole with an inner diameter larger than the outer diameter of the cross bar 7 is provided on the fixed plate 14, so as to ensure that the cross bar 7 has a certain amount of movement in the vertical direction within the through hole.

[0056] Specifically, in order to better realize the horizontal movement of the cross bar 7, a third nut 21 is also provided on the cross bar 7. The outer diameter of the third nut 21 is larger than the inner diameter of the through hole. When it is necessary to increase the height of the support plate 2, a wrench is used to rotate the third nut 21. When the third nut 21 sleeved on the cross bar 7 rotates, it can force the cross bar 7 to move outwards. When the cross bar 7 moves, it will pull the height increasing plate 5 to move upwards along the inclined plane of the guiding plate 6, thereby realizing the adjustment of the height of the support plate 2.

[0057] When it is necessary to lower the height of the support plate 2, first remove the third nut 21 from the cross bar 7, and then use a hammer or other item with higher hardness to strike the end of the cross bar 7, so as to force the cross bar 7 to push the height increasing plate 5 to move downward on the inclined surface of the guide plate 6. After the height of the support plate 2 is adjusted to the appropriate position, screw on the third nut 21 again, and finally the height of the support plate 2 is reduced.

[0058] A blind hole is also provided at the end of the cross bar 7 away from the height increasing plate 5. A first elastic member 22 and an adjusting rod 23 are arranged in the blind hole; a groove is provided on the side wall of the adjusting rod 23, and a connection hole communicating with the blind hole is also provided on the side wall of the cross bar 7. A locking rod 26 for inserting into the groove is arranged in the connection hole; an annular groove is further provided on the inner wall of the connection hole, and a second elastic member is arranged in the annular groove. The second elastic member is sleeved on the locking rod 26 and is connected to the locking rod 26 at one end.

[0059] In another embodiment, since a thread for connecting with the third nut 21 is provided on the cross bar 7, in order to prevent the thread from being damaged when the cross bar 7 is struck by a hammer, a first elastic member 22 and an adjusting rod are further arranged inside the end of the cross bar 7. When it is necessary to lower the height of the support plate 2 by striking the cross bar 7, only need to strike the adjusting rod 23 at the end of the cross bar 7, and the adjusting rod 23 then pushes the cross bar 7 to move, so as to realize the reduction of the height of the support plate 2; meanwhile, the first elastic member 22 arranged can reduce the impact force on the cross bar 7, achieving a certain protection effect on the cross bar 7.

[0060] At the same time, after the installation is completed, push the adjusting rod 23 into the blind hole of the cross bar 7, so that the groove on the adjusting rod 23 moves into the connection hole of the cross bar 7, and then screw on the third nut 21. Use the third nut 21 to push the locking rod 26 into the annular groove of the adjusting rod 23, so as to fix the adjusting rod 23 in the cross bar 7 and prevent the adjusting rod 23 from falling off the cross bar 7.

[0061] In order to ensure that when the third nut 21 is installed, the third nut 21 can push the locking rod 26 into the groove, the upper end of the locking rod 26 is of a spherical structure.

[0062] In another embodiment, in order to avoid the damage caused by striking the cross bar 7, when it is necessary to move the cross bar 7, one end of an additional steel plate or a metal plate with a rigid structure can be placed at the end of the height increasing plate 5, and then use a hammer to strike the other end of the steel plate. The impact force generated by striking the steel plate is used to push the position of the height increasing plate 5 to move, thus avoiding the damage caused by directly striking the cross bar 7.

[0063] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above description is only for the specific embodiments of the present utility model and is not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A centering adjustment device for the main motor shaft and the crankshaft of a supercharger, comprising a support frame (3) and a supercharger body (1). A support plate (2) is arranged at the bottom of the supercharger body (1), characterized in that, At least one adjusting member is provided between the support frame (3) and the support plate (2); The adjusting member includes a guide plate (6), a heightening plate (5) and a limiting member. The guide plate (6) is detachably connected to the support frame (3). The heightening plate (5) is located between the guide plate (6) and the support frame (3), and inclined surfaces are provided on the contact surfaces of the heightening plate (5) and the guide plate (6). One end of the limiting member is connected to the support frame (3), and the other end of the limiting member is slidably connected to the support plate (2) in the vertical direction.

2. The centering adjustment device for the main motor shaft and the crankshaft of a supercharger according to claim 1, wherein There are four adjusting members, and the four adjusting members are respectively distributed at the four corners of the support frame (3).

3. The centering adjustment device for the main motor shaft and the crankshaft of a supercharger according to claim 1, characterized in that A plurality of weight reduction holes (4) are provided on both sides of the support frame (3).

4. The centering adjustment device for the main motor shaft and the crankshaft of a supercharger according to claim 1, characterized in that, A rectangular hole is provided at the top of the support frame (3); One end of the guide plate (6) is provided with a fixing plate (14), at least one clamping member (8) is provided on the fixing plate (14), a protrusion (15) is provided at the other end of the guide plate (6), and the protrusion (15) is located in the rectangular hole. The clamping member (8) is used to fix the guide plate (6) on the support frame (3).

5. The centering adjustment device for the main motor shaft and the crankshaft of a supercharger according to claim 4, characterized in that, The clamping member (8) includes a threaded rod (17) and a first nut (18). The threaded rod (17) is connected to the fixing plate (14) by threads. The first nut (18) is sleeved on the end of the threaded rod (17) away from the support frame (3). A first gasket (19) is also sleeved on the threaded rod (17), and the first gasket (19) is located between the fixing plate (14) and the first nut (18).

6. A centering adjustment device for the main motor shaft and the crankshaft of a supercharger according to claim 5, characterized in that, A clamping section (20) is further provided at the end of the threaded rod (17) away from the support frame (3).

7. A centering adjustment device for the main motor shaft and the crankshaft of a supercharger according to claim 1, characterized in that The limiting member includes a bolt (11) and a second nut (9). The bolt vertically penetrates through the support frame (3) and the support plate (2) in sequence and then is connected to the second nut (9); A second gasket (10) is also sleeved on the bolt (11), and the second gasket (10) is located between the second nut (9) and the support plate (2).

8. A centering adjustment device for the main motor shaft and the crankshaft of a supercharger according to claim 7, characterized in that, Strip-shaped openings (12) are provided on both the heightening plate (5) and the guide plate (6), and a part of the bolt (11) is located in the strip-shaped openings (12).

9. The centering adjustment device for the main motor shaft and the crankshaft of a supercharger according to claim 4, characterized in that, It further includes a cross bar (7) and a third nut (21). A through hole with an inner diameter larger than the outer diameter of the cross bar (7) is provided on the fixing plate (14). One end of the cross bar (7) is connected to the heightening plate (5), and the other end passes through the through hole and is threadedly connected to the third nut (21).

10. A centering adjustment device for the main motor shaft and the crankshaft of a supercharger according to claim 9, characterized in that, A blind hole is further provided at the end of the cross bar (7) away from the heightening plate (5). A first elastic member (22) and an adjusting rod (23) are provided in the blind hole; A groove is provided on the side wall of the adjusting rod (23), and a connection hole communicating with the blind hole is also provided on the side wall of the cross bar (7). A locking rod (26) for inserting into the groove is provided in the connection hole; An annular groove is further provided on the inner wall of the connection hole. A second elastic member is provided in the annular groove. The second elastic member is sleeved on the locking rod (26) and is connected to the locking rod (26) at one end.