Positioning and fixing device for rotating body of dynamic balancing machine

Abstract

The utility model provides a positioning and fixing device of a dynamic balancing machine rotating body, which comprises a sandwich cylinder, a rotor and a bearing seat, the sandwich cylinder is used for an external rotating body shaft to pass through, the sandwich cylinder comprises a plurality of elastic clamping pieces, the plurality of elastic clamping pieces are all positioned at the end part of the sandwich cylinder and are distributed at equal intervals in the circumferential direction, and the bearing seat is arranged on the outer side of the sandwich cylinder. The elastic clamping piece comprises a connecting protruding piece. The elastic clamping pieces extrude the external rotating part shaft, so that connection treatment between the sandwich cylinder and the external rotating part shaft is completed, after assembly is completed, the sandwich cylinder and the rotor can rotate along with the external rotating part shaft, and under the action of the bearing seat, the rotating stability of the external rotating part shaft is improved; the elastic clamping pieces comprise the connecting protruding pieces located at the ends of the elastic clamping pieces, so that when the sandwich cylinder and the external rotating body shaft are assembled, a dustproof wall arranged on the outer ring of the product shaft sleeve can be avoided, and connection treatment between the sandwich cylinder and the external rotating body shaft is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of dynamic balancing machines, in particular to a positioning and fixing device for a rotating body of a dynamic balancing machine. Background Art

[0002] Dynamic balancing machine is a kind of equipment used to correct and balance rotating mechanical parts (such as shafts, wheels, fans, etc.). At present, fans, motors and other related products are all classified as rotating products in their mechanical working angle. In an ideal state, the mass distribution of rotating parts should be uniform, and the deviation centrifugal force generated by the products in working motion is the same.

[0003] In actual situations, due to uneven material distribution of rotating parts, uneven mold distribution, or errors in product processing, these factors will cause the product to generate deviated centrifugal force during operation. This deviated centrifugal force causes vibration when it rotates, and the vibration will cause the product to produce noise and wear the internal structural parts of the product, thus seriously affecting the performance and life of the product. Therefore, in the manufacturing process of such products, it is necessary to perform dynamic balancing correction on the rotating parts.

[0004] The invention with publication number CN114061832A proposes a wheel assembly dynamic balancing machine positioning fixture, including a fixed seat and a main shaft. A through hole is provided in the middle portion of the fixed seat, and the main shaft is arranged in the through hole and extends to both ends of the fixed seat; there are multiple bosses in a circular array on the side wall of the main shaft, and the surface of the boss away from the main shaft is an inclined surface, and the inclined surface is inclined in the direction of the wheel assembly and from high to low. However, when connecting the rotating body, the outer ring of the sleeve of the product may be provided with a dust wall. Due to the obstruction of the dust wall, the positioning and fixing structure of the dynamic balancing machine may not be connected to the rotating body shaft normally. Therefore, this scheme specifically proposes a positioning and fixing device for the rotating body of the dynamic balancing machine to solve the above problem. Utility Model Content

[0005] In view of this, the utility model proposes a positioning and fixing device for the rotating body of a dynamic balancing machine, wherein a plurality of elastic clips squeeze the external rotating shaft, thereby completing the connection between the core tube and the external rotating shaft. After assembly, the core tube and the rotor can rotate together with the external rotating shaft, and under the action of the bearing seat, the rotation stability of the rotating shaft is increased. By providing the elastic clips including the connection convex pieces at the ends thereof, the dustproof wall provided on the outer ring of the product sleeve can be avoided when assembling the core tube and the external rotating shaft, thereby facilitating the connection between the core tube and the external rotating shaft.

[0006] The technical solution of the utility model is implemented as follows: The utility model provides a positioning and fixing device for the rotating body of a dynamic balancing machine, including a sandwich tube, a rotor and a bearing seat, wherein:

[0007] The core tube is used for the external rotating body shaft to pass through, the core tube comprises a plurality of elastic clips, the plurality of elastic clips are all located at the ends of the core tube and are equidistantly distributed in the circumferential direction, the elastic clips comprise connecting protrusions, the connecting protrusions are located at the ends of the elastic clips, and the connecting protrusions are arc-shaped;

[0008] The rotor is sleeved on the outer side of the core tube and fixedly connected to the core tube. The rotor includes a clamping tube portion. The plurality of elastic clips are all located on the inner side of the clamping tube portion and fit with the clamping tube portion. The inner wall of the clamping tube portion is an inclined wall.

[0009] The bearing seat is located outside the rotor and is rotatably connected to the rotor. An assembly hole is provided on the bearing seat.

[0010] On the basis of the above technical solution, preferably, a supporting groove is opened on the bearing seat, and the supporting groove is annular. The rotor includes a supporting part, and the supporting part is adapted to the shape of the supporting groove and is rotatably arranged on the inner side of the supporting groove.

[0011] On the basis of the above technical solution, preferably, it also includes a deep groove ball bearing group, wherein,

[0012] A deep groove ball bearing group is arranged inside the bearing seat and connected to the rotor.

[0013] On the basis of the above technical solution, preferably, it also includes a flange block and assembly bolts, wherein:

[0014] A flange block is arranged on one side of the bearing seat and is used to limit the deep groove ball bearing group. A first bolt hole is opened on the flange block, and a second bolt hole is opened on the bearing seat. The assembly bolt passes through the first bolt hole and is threadedly connected with the second bolt hole.

[0015] On the basis of the above technical solution, preferably, a protective groove is provided on a side of the flange block away from the bearing seat, and the assembly bolt is located on an inner side of the protective groove.

[0016] On the basis of the above technical solution, preferably, it also includes an inner ring flat gasket, an outer ring flat gasket and a middle nut, wherein:

[0017] A center nut is threadedly connected to the rotor and is located on the inner side of the flange block. The inner ring flat gasket is sleeved on the circumference of the rotor and is located between the center nut and the deep groove ball bearing group.

[0018] The outer ring flat gasket is sleeved on the circumferential side of the rotor and is located outside the inner ring flat gasket. The outer ring flat gasket is located between the flange block and the deep groove ball bearing group.

[0019] On the basis of the above technical solution, preferably, it also includes a middle flat gasket, wherein,

[0020] The deep groove ball bearing group comprises an upper deep groove ball bearing and a lower deep groove ball bearing. The intermediate flat washer is sleeved on the circumferential side of the rotor and is located between the upper deep groove ball bearing and the lower deep groove ball bearing.

[0021] On the basis of the above technical solution, preferably, it also includes a pulley, wherein:

[0022] A pulley is threadedly connected to the rotor and is located on a side of the center nut away from the bearing seat, and is used to be connected to a rotating drive member of the dynamic balancing machine.

[0023] On the basis of the above technical solution, preferably, it further includes a buffer spring and a rear nut, wherein:

[0024] A rear nut, threadedly connected to the core tube and located at a side of the pulley away from the bearing seat;

[0025] A buffer spring is sleeved on the core tube, and two ends of the buffer spring are respectively in contact with the pulley and the rear nut.

[0026] On the basis of the above technical solution, preferably, it also includes a ball head wave top screw, wherein,

[0027] A mounting hole is provided at the end of the core tube, the ball head wave top screw is threadedly connected to the inner side of the mounting hole, and the end of the ball head wave top screw is spherical.

[0028] The positioning and fixing device of the rotating body of the dynamic balancing machine of the utility model has the following beneficial effects compared with the prior art:

[0029] (1) The connection is made by passing the external rotating body shaft through the inner side of the sandwich tube, and then a plurality of elastic clips are squeezed through the rotor to complete the connection between the sandwich tube and the external rotating body shaft. The bearing seat is rotated and connected to the outer side of the rotor, and bolts are passed through the assembly hole to connect to the external assembly platform, thereby completing the assembly of the bearing seat. After the assembly is completed, the sandwich tube and the rotor can rotate together with the external rotating body shaft. Under the action of the bearing seat, the rotation stability of the rotating body shaft is increased. By providing the elastic clip including a connecting protrusion at its end, when assembling the sandwich tube and the external rotating body shaft, the dustproof wall provided on the outer ring of the product sleeve can be avoided, so that the connection between the sandwich tube and the external rotating body shaft is convenient.

[0030] (2) By providing a deep groove ball bearing group including two deep groove ball bearings, the rotational stability of the rotor is increased under the dual action of the upper deep groove ball bearing and the lower deep groove ball bearing. By providing a middle flat gasket between the upper deep groove ball bearing and the lower deep groove ball bearing, the two deep groove ball bearings can be prevented from interfering with each other. By providing a buffer spring, when the device is subjected to preload external force and load impact, the buffer spring can increase the rotational stability of the core tube by the impact force of the expansion and contraction replacement core tube, thereby increasing the service life of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a top perspective view of the positioning and fixing device of the rotating body of the dynamic balancing machine of the utility model;

[0033] Figure 2 It is a bottom perspective view of the positioning and fixing device of the rotating body of the dynamic balancing machine of the utility model;

[0034] Figure 3 It is a front view of the positioning and fixing device of the rotating body of the dynamic balancing machine of the utility model;

[0035] Figure 4 The utility model is a positioning and fixing device for the rotating body of the dynamic balancing machine Figure 3 A cross-sectional view of the structure at AA is shown;

[0036] Figure 5 It is a three-dimensional schematic diagram of the positioning and fixing device of the rotating body of the dynamic balancing machine of the utility model after the bearing seat and the flange block are removed;

[0037] Figure 6 It is a schematic diagram of the connection mode between the bearing seat and the flange block of the positioning and fixing device of the rotating body of the dynamic balancing machine of the utility model;

[0038] Figure 7 The utility model is a positioning and fixing device for the rotating body of the dynamic balancing machine Figure 5 An exploded schematic diagram of the structure shown;

[0039] Figure 8 It is a schematic diagram of the connection mode between the rotor and the deep groove ball bearing group of the positioning and fixing device of the rotating body of the dynamic balancing machine of the utility model;

[0040] Fig. 9 The utility model is a positioning and fixing device for the rotating body of the dynamic balancing machine Figure 7 An exploded schematic diagram of the structure shown;

[0041] Fig.10 It is a three-dimensional schematic diagram of a sandwich tube of a positioning and fixing device for a rotating body of a dynamic balancing machine of the utility model;

[0042] Fig.11 A three-dimensional schematic diagram of a ball-head wave-top screw of a positioning and fixing device for a rotating body of a dynamic balancing machine of the utility model;

[0043] Fig.12 The utility model is a three-dimensional schematic diagram of the rotor of the positioning and fixing device of the rotating body of the dynamic balancing machine. DETAILED DESCRIPTION

[0044] The following will be combined with the implementation of the utility model to clearly and completely describe the technical solutions in the implementation of the utility model. Obviously, the described implementation is only a part of the implementation of the utility model, not all of the implementations. Based on the implementation of the utility model, all other implementations obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0045] like Figures 1 to 12 As shown, the positioning and fixing device of the rotating body of the dynamic balancing machine of the utility model is characterized in that it includes a sandwich tube 1, a rotor 2 and a bearing seat 3, wherein the sandwich tube 1 is used for the external rotating body shaft to pass through, the sandwich tube 1 includes a plurality of elastic clips 11, the plurality of elastic clips 11 are all located at the end of the sandwich tube 1, and are circumferentially equidistantly distributed, the elastic clips 11 include connecting protrusions 111, the connecting protrusions 111 are located at the end of the elastic clips 11, and the connecting protrusions 111 are arc-shaped; the rotor 2 is sleeved on the outer side of the sandwich tube 1 and fixedly connected to the sandwich tube 1, the rotor 2 includes a clamping cylinder part 21, the plurality of elastic clips 11 are all located on the inner side of the clamping cylinder part 21, and fit with the clamping cylinder part 21, and the inner wall of the clamping cylinder part 21 is an inclined wall; the bearing seat 3 is located on the outer side of the rotor 2 and is rotatably connected to the rotor 2, and an assembly hole 31 is opened on the bearing seat 3.

[0046] In a specific implementation, both ends of the core tube 1 pass through the rotor 2 , and both ends of the rotor 2 pass through the bearing seat 3 .

[0047] In the specific implementation, the connection is made by passing the external rotating body shaft through the inner side of the sandwich tube 1, and then the rotor 2 is sleeved on the outer side of the sandwich tube 1 and connected to the sandwich tube 1. At this time, the clamping tube part 21 is located on the outer side of the multiple elastic clips 11. Since the inner wall of the clamping tube part 21 is an inclined wall, when the rotor 2 is connected, the inner wall of the clamping tube part 21 can squeeze the multiple elastic clips 11. The multiple elastic clips 11 are deformed and squeeze the rotating body shaft inward, thereby completing the connection between the sandwich tube 1 and the external rotating body shaft. Finally, the bearing seat 3 is rotatably connected to the outside of the rotor 2, and connected to the external assembly platform by bolts passing through the assembly hole 31, thereby completing the assembly of the bearing seat 3. At this time, the sandwich tube 1 and the rotor 2 can rotate together with the external rotating body shaft. Under the action of the bearing seat 3, the rotation stability of the rotating body shaft is increased. By providing the elastic clip 11 including the connecting protrusion 111 at its end, the dustproof wall provided on the outer ring of the product sleeve can be avoided when assembling the core tube 1 and the external rotating shaft, so as to facilitate the connection between the core tube 1 and the external rotating shaft.

[0048] As a preferred embodiment, a bearing groove 32 is formed on the bearing seat 3 , and the bearing groove 32 is annular. The rotor 2 includes a supporting portion 22 , which is adapted to the shape of the supporting groove 32 and is rotatably arranged on the inner side of the supporting groove 32 .

[0049] In a specific implementation, the supporting portion 22 rotates inside the supporting groove 32. With such a design, the supporting groove 32 can support the supporting portion 22 and further support the rotor 2, thereby increasing the rotation stability of the rotor 2.

[0050] As a preferred embodiment, it further includes a deep groove ball bearing group 4 , wherein the deep groove ball bearing group 4 is arranged inside the bearing seat 3 and connected to the rotor 2 .

[0051] In a specific implementation, when the rotor 2 rotates, the deep groove ball bearing set 4 rotates synchronously to increase the rotation stability of the rotor 2 .

[0052] As a preferred embodiment, it also includes a flange block 51 and an assembly bolt 52, wherein the flange block 51 is arranged on one side of the bearing seat 3, and is used to limit the deep groove ball bearing group 4, a first bolt hole 511 is opened on the flange block 51, and a second bolt hole 33 is opened on the bearing seat 3, and the assembly bolt 52 passes through the first bolt hole 511 and is threadedly connected with the second bolt hole 33.

[0053] Specifically, after the deep groove ball bearing set 4 is assembled, the flange block 51 needs to be covered on the bearing seat 3, and the flange block 51 and the bearing seat 3 are detachably connected by assembling bolts 52. After the connection is completed, the flange block 51 can limit the deep groove ball bearing set 4 by blocking the deep groove ball bearing set 4, thereby increasing the connection stability of the deep groove ball bearing set 4.

[0054] As a preferred implementation, a protection groove 512 is formed on a side of the flange block 51 away from the bearing seat 3 , and the assembly bolt 52 is located on the inner side of the protection groove 512 .

[0055] With such a design, after the assembly bolt 52 is assembled, the assembly bolt 52 is located inside the protection groove 512 , and the groove wall of the protection groove 512 can protect the assembly bolt 52 .

[0056] As a preferred embodiment, it also includes an inner ring flat gasket 61, an outer ring flat gasket 62 and a center nut 81, wherein the center nut 81 is threadedly connected to the rotor 2 and is located on the inner side of the flange block 51, the inner ring flat gasket 61 is sleeved on the circumferential side of the rotor 2 and is located between the center nut 81 and the deep groove ball bearing group 4; the outer ring flat gasket 62 is sleeved on the circumferential side of the rotor 2 and is located on the outer side of the inner ring flat gasket 61, and the outer ring flat gasket 62 is located between the flange block 51 and the deep groove ball bearing group 4.

[0057] In a specific implementation, when assembling the flange block 51, the inner ring flat gasket 61 is sleeved on the rotor 2, and the center nut 81 is sleeved on the rotor 2, and the inner ring flat gasket 61 is made to be close to the deep groove ball bearing group 4 by rotating the center nut 81, and then the outer ring flat gasket 62 is passed through the rotor 2 and is close to the deep groove ball bearing group 4, and then the outer ring flat gasket 62 is located on the outside of the inner ring flat gasket 61, and finally the flange block 51 is connected to the bearing seat 3, thereby completing the installation of the inner ring flat gasket 61 and the outer ring flat gasket 62, and at this time the inner ring flat gasket 61 and the outer ring flat gasket 62 can pad the end of the deep groove ball bearing group 4, thereby increasing the connection stability of the deep groove ball bearing group 4.

[0058] As a preferred embodiment, it also includes a middle flat gasket 63, wherein the deep groove ball bearing group 4 includes an upper deep groove ball bearing 41 and a lower deep groove ball bearing 42, and the middle flat gasket 63 is sleeved on the circumferential side of the rotor 2 and is located between the upper deep groove ball bearing 41 and the lower deep groove ball bearing 42.

[0059] This design further increases the rotation stability of the rotor 2 under the dual action of the upper deep groove ball bearing 41 and the lower deep groove ball bearing 42. By providing a middle flat spacer 63 between the upper deep groove ball bearing 41 and the lower deep groove ball bearing 42, mutual interference between the two deep groove ball bearings can be prevented.

[0060] As a preferred embodiment, it further comprises a pulley 7, wherein the pulley 7 is threadedly connected to the rotor 2 and is located on a side of the center nut 81 away from the bearing seat 3, for connecting with a rotating drive member of the dynamic balancing machine.

[0061] As a preferred embodiment, it also includes a buffer spring 91 and a rear nut 82, wherein the rear nut 82 is threadedly connected to the sandwich tube 1 and is located on the side of the pulley 7 away from the bearing seat 3; the buffer spring 91 is sleeved on the sandwich tube 1, and the two ends of the buffer spring 91 are respectively in contact with the pulley 7 and the rear nut 82.

[0062] With this design, when the device is subjected to external pre-compression force and load impact, the buffer spring 91 can increase the rotational stability of the core tube 1 by expanding and contracting the impact force on the core tube 1, thereby increasing the service life of the device.

[0063] As a preferred embodiment, it also includes a ball head wave top screw 92, wherein a mounting hole 12 is opened at the end of the sandwich tube 1, the ball head wave top screw 92 is threadedly connected to the inner side of the mounting hole 12, and the end of the ball head wave top screw 92 is spherical.

[0064] In a specific implementation, the ball head wave top screw 92 simultaneously plays the role of buffering the pre-compression external force and the load impact. By setting the ball head wave top screw 92 to be detachably connected to the end of the sandwich tube 1, the sandwich tube 1 is subjected to force at the center point when it is lifted. At the same time, impurities such as impurities and debris will accumulate inside the tube during the production process. The ball head wave top screw 92 can be easily disassembled, thereby facilitating the cleaning of the inside of the sandwich tube 1.

[0065] The working principle of the utility model is introduced as follows:

[0066] The outer ring of the core tube 1 is coated with lubricating oil and assembled into the inside of the rotor 2. At this time, the shaft of the external rotating part passes through the inner side of the core tube 1 and squeezes the elastic clip 11 through the rotor 2, thereby completing the connection between the core tube 1 and the shaft of the external rotating part. Then, the rotor 2 is assembled on the bearing seat 3, the inner wall of the bearing seat 3 is coated with lubricating oil, the deep groove ball bearing group 4 is connected to the bearing seat 3, the inner ring flat gasket 61 and the outer ring flat gasket 62 are sleeved on the outer side of the rotor 2, and the middle nut 81 is threadedly connected to the rotor 2, and the flange block 51 is connected to the bearing seat 3 through the assembly bolt 52, thereby completing the connection between the inner ring flat gasket 61 and the outer ring flat gasket 62. At this time, the inner ring flat gasket 61, the outer ring flat gasket 62 and the middle flat gasket 63 can increase the connection stability of the deep groove ball bearing group 4. The pulley 7 is connected to the rotor 2, and can be connected to the rotating drive member of the dynamic balancing machine through the pulley 7. The buffer spring 91 is sleeved on the sandwich tube 1 and threadedly connected with the rear nut 82 and the ball head wave top screw 92. At this time, the buffer spring 91 and the ball head wave top screw 92 can buffer the pre-compression external force and load impact. The ball head wave top screw 92 is detachable to facilitate cleaning of impurities and debris accumulated inside the sandwich tube 1.

[0067] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A positioning and fixing device for a rotating body of a dynamic balancing machine, characterized in that: It comprises a core tube (1), a rotor (2) and a bearing seat (3), wherein: The core tube (1) is used for allowing the shaft of the external rotating body to pass through, the core tube (1) comprises a plurality of elastic clips (11), the plurality of elastic clips (11) are all located at the ends of the core tube (1) and are equidistantly distributed in the circumferential direction, the elastic clips (11) comprise connecting protrusions (111), the connecting protrusions (111) are located at the ends of the elastic clips (11), and the connecting protrusions (111) are arc-shaped; The rotor (2) is sleeved on the outer side of the core tube (1) and fixedly connected to the core tube (1). The rotor (2) comprises a clamping tube portion (21). The plurality of elastic clips (11) are all located on the inner side of the clamping tube portion (21) and fit the clamping tube portion (21). The inner wall of the clamping tube portion (21) is an inclined wall. The bearing seat (3) is located outside the rotor (2) and is rotatably connected to the rotor (2). An assembly hole (31) is provided on the bearing seat (3).

2. The positioning and fixing device for the rotating body of a dynamic balancing machine according to claim 1, characterized in that: The bearing seat (3) is provided with a supporting groove (32) which is annular in shape. The rotor (2) comprises a supporting portion (22) which is adapted to the shape of the supporting groove (32) and is rotatably arranged on the inner side of the supporting groove (32).

3. The positioning and fixing device for the rotating body of a dynamic balancing machine according to claim 1, characterized in that: It also includes a deep groove ball bearing set (4), wherein: A deep groove ball bearing group (4) is arranged inside the bearing seat (3) and connected to the rotor (2).

4. The positioning and fixing device for the rotating body of a dynamic balancing machine according to claim 3, characterized in that: It also includes a flange block (51) and mounting bolts (52), wherein: A flange block (51) is arranged on one side of the bearing seat (3) and is used to limit the deep groove ball bearing group (4). A first bolt hole (511) is provided on the flange block (51), and a second bolt hole (33) is provided on the bearing seat (3). The assembly bolt (52) passes through the first bolt hole (511) and is threadedly connected to the second bolt hole (33).

5. The positioning and fixing device for the rotating body of a dynamic balancing machine according to claim 4, characterized in that: A protection groove (512) is provided on a side of the flange block (51) away from the bearing seat (3), and the assembly bolt (52) is located inside the protection groove (512).

6. The positioning and fixing device for the rotating body of a dynamic balancing machine according to claim 4, characterized in that: It also includes an inner ring flat gasket (61), an outer ring flat gasket (62) and a center nut (81), wherein: A center nut (81) is threadedly connected to the rotor (2) and is located on the inner side of the flange block (51); the inner ring flat gasket (61) is sleeved on the circumference of the rotor (2) and is located between the center nut (81) and the deep groove ball bearing group (4); The outer ring flat gasket (62) is sleeved on the circumferential side of the rotor (2) and is located on the outer side of the inner ring flat gasket (61). The outer ring flat gasket (62) is located between the flange block (51) and the deep groove ball bearing group (4).

7. The positioning and fixing device for the rotating body of a dynamic balancing machine according to claim 3, characterized in that: It also includes a middle flat gasket (63), wherein: The deep groove ball bearing group (4) comprises an upper deep groove ball bearing (41) and a lower deep groove ball bearing (42), and the intermediate flat washer (63) is sleeved on the circumferential side of the rotor (2) and is located between the upper deep groove ball bearing (41) and the lower deep groove ball bearing (42).

8. The positioning and fixing device for the rotating body of a dynamic balancing machine according to claim 6, characterized in that: Also includes a pulley (7), wherein: A pulley (7) is threadedly connected to the rotor (2) and is located on a side of the center nut (81) away from the bearing seat (3), and is used to be connected to a rotating drive member of a dynamic balancing machine.

9. The positioning and fixing device for the rotating body of a dynamic balancing machine according to claim 8, characterized in that: It also includes a buffer spring (91) and a rear nut (82), wherein: A rear nut (82) is threadedly connected to the core tube (1) and is located on a side of the pulley (7) away from the bearing seat (3); A buffer spring (91) is sleeved on the core tube (1), and two ends of the buffer spring (91) are respectively in contact with the pulley (7) and the rear nut (82).

10. The positioning and fixing device for the rotating body of a dynamic balancing machine according to claim 8, characterized in that: Also included is a ball head wave top screw (92), wherein: The end of the core tube (1) is provided with a mounting hole (12), the ball head wave top screw (92) is threadedly connected to the inner side of the mounting hole (12), and the end of the ball head wave top screw (92) is spherical.

Images