Internal and external double-centering clamp for composite material rotary body

Abstract

The invention discloses an internal and external double-centering clamp for a composite material rotary body, and relates to the field of clamps, the internal and external double-centering clamp comprises an inner mounting seat, an outer mounting seat, a driving mechanism, at least three centering mechanisms and at least three supporting telescopic mechanisms, the multiple supporting telescopic mechanisms are sequentially arranged outside the outer mounting base in the circumferential direction. Each centering mechanism comprises a rocker arm and a first sleeve, the multiple first sleeves of the multiple centering mechanisms are sequentially hinged to the inner mounting base in the circumferential direction, one ends of the multiple rocker arms of the multiple centering mechanisms are sequentially hinged to the outer mounting base in the circumferential direction, and the other end of each rocker arm is slidably arranged in the corresponding first sleeve in a sleeved mode and can extend into the corresponding through hole; the driving mechanism is arranged on the outer mounting base and used for driving the inner mounting base to rotate relative to the outer mounting base. According to the internal and external double-centering clamp for the composite material rotary body, rapid double centering can be carried out on an internal structure and an external structure, and the assembling coaxiality of a newly-added rotary body and a main rotary body can be guaranteed.

Description

Technical Field

[0001] The invention relates to the field of clamps, in particular to an inner and outer double-centering clamp of a composite material rotating body. Background Art

[0002] The solid rocket engine casing is used to bear the axial load of the rocket, ensuring that the fuel-carrying compartment of the missile is not damaged by axial pressure during storage and operation, thereby ensuring the stability of the missile structure. Since this type of composite rotating body needs to add different coaxial structures upward during the molding process, it needs to be repeatedly disassembled and centered during the molding process, so there are certain requirements for the coaxiality of different structures during the molding process and the ease of disassembly and assembly.

[0003] There is no fixture designed for the molding process of this type of composite rotating body. At present, the production process uses traditional machine tool fixture structures, such as triangular chucks, which can only be clamped on the outer wall of the shaft or supported on the inner wall of the rotating body to complete the clamping, and it is difficult to ensure the coaxiality of the assembly of the newly added rotating body and the main rotating body. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides an internal and external double centering fixture for a composite material rotating body, which can quickly double-center the internal and external structures and ensure the assembly coaxiality of the newly added rotating body and the main rotating body.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides an internal and external double centering fixture for a composite material rotating body, comprising an inner mounting seat, an outer mounting seat, a driving mechanism, at least three centering mechanisms and at least three supporting and telescopic mechanisms, wherein the outer mounting seat is rotatably sleeved on the outside of the inner mounting seat, and a plurality of the supporting and telescopic mechanisms are sequentially arranged on the outside of the outer mounting seat along the circumferential direction; a through hole is arranged in the middle of the inner mounting seat, and the centering mechanism comprises a rocker arm and a first sleeve, a plurality of the first sleeves of a plurality of the centering mechanisms are sequentially hinged to the inner mounting seat along the circumferential direction, one end of a plurality of the rocker arms of a plurality of the centering mechanisms are sequentially hinged to the outer mounting seat along the circumferential direction, and the other end of each of the rocker arms is slidably sleeved in one of the first sleeves and can extend into the through hole; the driving mechanism is arranged on the outer mounting seat, and is used to drive the inner mounting seat to rotate relative to the outer mounting seat.

[0007] Preferably, the supporting telescopic mechanism includes a second sleeve, a linear telescopic driving component and a telescopic arm, one end of the second sleeve is fixed to the outside of the outer mounting seat, the telescopic arm is slidably sleeved inside the other end of the second sleeve, and the linear telescopic driving component is arranged in the second sleeve and is used to drive the telescopic arm to move relative to the second sleeve.

[0008] Preferably, the supporting telescopic mechanism further comprises an outer roller, the outer roller is rotatably mounted on one end of the telescopic arm away from the outer mounting seat, and the axial direction of the outer roller is consistent with the axial direction of the outer mounting seat.

[0009] Preferably, the linear telescopic driving component is a hydraulic cylinder, a cylinder body of the hydraulic cylinder is fixed in the second sleeve, and a piston rod of the hydraulic cylinder is fixedly connected to the telescopic arm.

[0010] Preferably, the supporting telescopic mechanism also includes connecting bolts and connecting nuts, strip holes are provided on both sides of the second sleeve, a receiving groove is provided at one end of the telescopic arm close to the outer mounting seat, the piston rod of the hydraulic cylinder extends into the receiving groove, and the connecting bolt passes through one of the strip holes, one side of the telescopic arm, the piston rod of the hydraulic cylinder, the other side of the telescopic arm and another strip hole in sequence and is installed with the connecting nut.

[0011] Preferably, the centering mechanism further comprises an inner roller, which is rotatably mounted on one end of the rocker arm extending into the through hole, and the axial direction of the inner roller is consistent with the axial direction of the inner mounting seat.

[0012] Preferably, the driving mechanism includes a first mounting block, a second mounting block and a lead screw, an extension plate is provided on the outside of the inner mounting seat, the second mounting block is hinged on the extension plate, a threaded hole is provided on the second mounting block, the first mounting block is hinged on the outer mounting seat, one end of the lead screw is rotatably mounted on the first mounting block, and the other end of the lead screw is mounted in the threaded hole and extends to the outside of the second mounting block.

[0013] Preferably, the inner mounting seat includes a first cylinder, a second cylinder and an annular base plate which are coaxially arranged from top to bottom, the extension plate is arranged on one side of the outside of the first cylinder, the outer diameters of the first cylinder and the annular base plate are both larger than the outer diameter of the second cylinder, the outer mounting seat is rotatably sleeved on the outside of the second cylinder, and the annular base plate is fixed to the second cylinder by a plurality of fixing bolts; a plurality of mounting holes are sequentially arranged on the first cylinder along the circumferential direction, the mounting holes pass through both sides of the first cylinder, each of the first sleeves is located in one of the mounting holes and is hinged to the first cylinder.

[0014] Preferably, the plurality of supporting telescopic mechanisms are uniformly arranged in sequence along the circumferential direction on the outside of the outer mounting seat, the plurality of the first sleeves of the plurality of the centering mechanisms are uniformly hinged to the inner mounting seat in sequence along the circumferential direction, and one ends of the plurality of the rocker arms of the plurality of the centering mechanisms are uniformly hinged to the outer mounting seat in sequence along the circumferential direction.

[0015] Preferably, the supporting and retracting mechanisms and the centering mechanisms are both provided in three numbers.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The composite material rotating body inner and outer double centering fixture of the present invention comprises an inner mounting seat, an outer mounting seat, a driving mechanism, at least three centering mechanisms and at least three supporting telescopic mechanisms. When in use, the inner mounting seat is sleeved on the central axis of the main rotating body, and the driving mechanism drives the inner mounting seat to rotate relative to the outer mounting seat. Due to the limitation of the first sleeve, the rocker arm swings and the inner end can move toward the central axis. The central axis is quickly clamped and centered by multiple centering mechanisms, and multiple supporting telescopic mechanisms are synchronously extended until they contact the inner wall of the newly added rotating body, so that the internal and external structures can be quickly double-centered, ensuring that the central axis of the newly added rotating body and the main rotating body are arranged in a colinear manner, thereby ensuring the assembly coaxiality of the newly added rotating body and the main rotating body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 A schematic diagram of the structure of the internal and external double centering fixture of the composite material rotating body provided by the present invention;

[0020] Figure 2 A bottom view of the inner and outer double centering fixture of the composite material rotating body provided by the present invention;

[0021] Figure 3 It is a right side view of the inner and outer double centering fixture of the composite material rotating body provided by the present invention;

[0022] Figure 4 A cross-sectional view of the inner and outer double centering fixture of the composite material rotating body provided by the present invention;

[0023] Figure 5 A schematic diagram of the structure of the first mounting block in the composite material rotating body inner and outer double centering fixture provided by the present invention;

[0024] Figure 6 This is a schematic diagram of the use of the internal and external double centering fixture of the composite material rotating body provided by the present invention.

[0025] Explanation of the reference numerals: 100, inner and outer double centering fixture for composite rotating body; 1, outer mounting seat; 2, inner mounting seat; 201, first cylinder; 202, second cylinder; 203, annular base plate; 204, fixing bolt; 205, mounting hole; 3, rocker arm; 4, washer; 5, first step screw; 6, first sleeve; 7, second step screw; 8, inner roller; 9, extension plate; 10, first mounting block; 11, second mounting block; 12, U-shaped groove; 13, lead screw; 14, limit plate; 15, connecting plate; 16, second sleeve; 17, strip hole; 18, telescopic arm; 19, connecting bolt; 20, connecting nut; 21, outer roller; 22, first stud; 23, first fixing nut; 200, main rotating body; 300, center axis; 400, newly added rotating body. 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] The purpose of the present invention is to provide an internal and external double centering fixture for a composite material rotating body, which can quickly double-center the internal and external structures and ensure the assembly coaxiality of the newly added rotating body and the main rotating body.

[0028] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] like Figure 1-Figure 6As shown, this embodiment provides an internal and external double centering fixture 100 for a composite material rotating body, including an inner mounting seat 2, an outer mounting seat 1, a driving mechanism, at least three centering mechanisms and at least three supporting and telescopic mechanisms. The outer mounting seat 1 is rotatably sleeved on the outside of the inner mounting seat 2, and a plurality of supporting and telescopic mechanisms are sequentially arranged on the outside of the outer mounting seat 1 along the circumferential direction. The plurality of supporting and telescopic mechanisms are used for quickly centering the external structure and adaptively adjusting the external structures with different inner diameters. The external structure in this embodiment is a newly added rotating body 400. A through hole is provided in the middle of the inner mounting seat 2, and the centering mechanism includes a rocker arm 3 and a first sleeve 6. The multiple first sleeves 6 of the multiple centering mechanisms are hinged to the inner mounting seat 2 in sequence along the circumferential direction, and one end of the multiple rockers 3 of the multiple centering mechanisms is hinged to the outer mounting seat 1 in sequence along the circumferential direction. The other end of each rocker arm 3 is slidably sleeved in a first sleeve 6 and can extend into the through hole. The multiple centering mechanisms are used to quickly center the internal structure and to adaptively adjust the internal structures with different outer diameters. The internal structure in this embodiment is the central axis 300 of the main rotating body 200. The driving mechanism is provided on the outer mounting seat 1 and is used to drive the inner mounting seat 2 to rotate relative to the outer mounting seat 1.

[0030] When in use, the inner mounting seat 2 is sleeved on the central axis 300 of the main rotating body 200, and the driving mechanism drives the inner mounting seat 2 to rotate relative to the outer mounting seat 1. Due to the limitation of the first sleeve 6, the rocker arm 3 swings and the inner end can move toward the central axis 300. The central axis 300 is quickly clamped and centered by multiple centering mechanisms, and multiple supporting telescopic mechanisms are synchronously extended until they contact the inner wall of the newly added rotating body 400, so that the internal and external structures can be quickly double-centered to ensure that the newly added rotating body 400 and the central axis 300 of the main rotating body 200 are colinearly arranged, thereby ensuring the assembly coaxiality of the newly added rotating body 400 and the main rotating body 200, which is suitable for the assembly process of composite rotating bodies of various sizes.

[0031] Specifically, the supporting telescopic mechanism includes a second sleeve 16, a linear telescopic driving component and a telescopic arm 18. One end of the second sleeve 16 is fixed to the outside of the outer mounting seat 1, and the telescopic arm 18 is slidably sleeved inside the other end of the second sleeve 16. The linear telescopic driving component is arranged in the second sleeve 16 and is used to drive the telescopic arm 18 to move relative to the second sleeve 16.

[0032] In order to facilitate the installation of the second sleeve 16 , a connecting plate 15 is provided at one end of the second sleeve 16 close to the outer mounting seat 1 , and the connecting plate 15 is fixed on the outer mounting seat 1 .

[0033] The supporting telescopic mechanism in this embodiment further includes an outer roller 21, which is rotatably mounted on one end of the telescopic arm 18 away from the outer mounting seat 1, and the axial direction of the outer roller 21 is consistent with the axial direction of the outer mounting seat 1. The outer roller 21 enables the telescopic arm 18 to rotate when it is driven by the linear telescopic drive component to extend and contact the inner wall of the newly added rotating part, thereby facilitating the adjustment of the assembly position of the newly added rotating part and achieving precise assembly.

[0034] The supporting telescopic mechanism also includes a first stud 22 and two first fixing nuts 23. A first mounting groove is provided at one end of the telescopic arm 18 away from the outer mounting seat 1, and the outer roller 21 is located in the first mounting groove. The first stud 22 passes through one side of the telescopic arm 18, the outer roller 21 and the other side of the telescopic arm 18 in sequence. A first fixing nut 23 is installed at both ends of the first stud 22 to enable the outer roller 21 to be rotatably installed on the telescopic arm 18.

[0035] The linear telescopic driving component in this example is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixed in the second sleeve 16 , and the piston rod of the hydraulic cylinder is fixedly connected to the telescopic arm 18 .

[0036] Specifically, the supporting telescopic mechanism also includes connecting bolts 19 and connecting nuts 20. Strip holes 17 are provided on both sides of the second sleeve 16. A receiving groove is provided at one end of the telescopic arm 18 close to the outer mounting seat 1. The piston rod of the hydraulic cylinder extends into the receiving groove. The connecting bolts 19 pass through a strip hole 17, one side of the telescopic arm 18, the piston rod of the hydraulic cylinder, the other side of the telescopic arm 18 and another strip hole 17 in sequence and are installed with connecting nuts 20, thereby fixing the telescopic arm 18 to the piston rod of the hydraulic cylinder.

[0037] The centering mechanism in this embodiment further includes an inner roller 8, which is rotatably mounted on one end of the rocker arm 3 extending into the through hole, and the axial direction of the inner roller 8 is consistent with the axial direction of the inner mounting seat 2. The inner roller 8 allows the entire structure to rotate on the central axis 300, which facilitates the adjustment of the orientation during assembly and simplifies the assembly process.

[0038] The centering mechanism also includes a second stud and two second fixing nuts. A second mounting groove is provided at the inner end of the rocker arm 3, and the inner roller 8 is located in the second mounting groove. The second stud passes through one side of the rocker arm 3, the inner roller 8 and the other side of the rocker arm 3 in sequence. A second fixing nut is installed at both ends of the second stud to realize the rotational installation of the inner roller 8 on the rocker arm 3.

[0039] Specifically, the driving mechanism includes a first mounting block 10, a second mounting block 11 and a lead screw 13. An extension plate 9 is provided on the outside of the inner mounting seat 2. The second mounting block 11 is hinged to the extension plate 9. A threaded hole is provided on the second mounting block 11. The first mounting block 10 is hinged to the outer mounting seat 1. One end of the lead screw 13 is rotatably mounted on the first mounting block 10. The other end of the lead screw 13 is installed in the threaded hole and extends to the outside of the second mounting block 11.

[0040] like Figure 5 As shown, a U-shaped groove 12 is provided on the side of the first mounting block 10 away from the outer mounting seat 1, and a lead screw 13 is rotatably installed in the U-shaped groove 12. Two limit plates 14 are provided at one end of the lead screw 13, and the two limit plates 14 are respectively located on both sides of the U-shaped groove 12, so that the lead screw 13 can rotate in situ relative to the first mounting block 10.

[0041] The second mounting block 11 is driven to move by rotating the lead screw 13, so that the inner mounting seat 2 rotates relative to the outer mounting seat 1. Due to the restriction of the first sleeve 6, the rocker arm 3 swings and the inner end can move toward or away from the center axis 300, so that precise clamping diameter adjustment can be achieved. At the same time, the lead screw structure can allow the second mounting block 11 to produce a self-locking effect to prevent the rocker arm 3 from shaking after clamping and losing its fixing ability.

[0042] In this specific embodiment, the first mounting block 10 is hinged to the outer mounting seat 1 by means of a third step screw, and the second mounting block 11 is hinged to the extension plate 9 by means of a fourth step screw.

[0043] Specifically, the inner mounting seat 2 includes a first cylinder 201, a second cylinder 202 and an annular base plate 203 which are coaxially arranged from top to bottom, and the extension plate 9 is arranged on one side of the outside of the first cylinder 201. The outer diameters of the first cylinder 201 and the annular base plate 203 are both larger than the outer diameter of the second cylinder 202. The outer mounting seat 1 is rotatably sleeved on the outside of the second cylinder 202, and the annular base plate 203 is fixed to the second cylinder 202 by a plurality of fixing bolts 204. The first cylinder 201 and the annular base plate 203 are used to limit the axial movement of the outer mounting seat 1; a plurality of mounting holes 205 are sequentially arranged on the first cylinder 201 along the circumferential direction, and the mounting holes 205 pass through both sides of the first cylinder 201. Each first sleeve 6 is located in a mounting hole 205 and is hinged to the first cylinder 201.

[0044] In this embodiment, the central holes of the first cylinder 201, the second cylinder 202 and the annular bottom plate 203 are connected in sequence to form a through hole, and the inner diameters of the first cylinder 201, the second cylinder 202 and the annular bottom plate 203 are all the same.

[0045] Specifically, the outer mounting seat 1 is a circular ring structure, and the inner wall of the outer mounting seat 1 fits with the outer wall of the second cylinder 202. The outer diameter of the outer mounting seat 1 is greater than the outer diameter of the first cylinder 201.

[0046] In this specific embodiment, one end of the rocker arm 3 is hinged to the outer mounting seat 1 through a first step screw 5, a washer 4 is arranged between one end of the rocker arm 3 and the outer mounting seat 1, and the washer 4 is sleeved on the first step screw 5; the first sleeve 6 is hinged to the first cylinder 201 through a second step screw 7.

[0047] The multiple supporting telescopic mechanisms in this embodiment are evenly arranged on the outside of the outer mounting seat 1 along the circumferential direction, the multiple first sleeves 6 of the multiple centering mechanisms are evenly hinged to the inner mounting seat 2 along the circumferential direction, and one ends of the multiple rocker arms 3 of the multiple centering mechanisms are evenly hinged to the outer mounting seat 1 along the circumferential direction.

[0048] In this specific embodiment, three supporting telescopic mechanisms and three centering mechanisms are provided.

[0049] The specific usage process is as follows: Figure 6 As shown, the two ends of the central axis 300 of the main rotating body 200 are clamped, and in this process, the inner mounting seat 2 is sleeved on the central axis 300, and the newly added rotating body 400 is sleeved on the outside of the inner and outer double centering fixture 100 of the composite rotating body; the lead screw 13 is turned, and through the matching relationship between the lead screw 13 and the second mounting block 11, the inner mounting seat 2 is driven to rotate relative to the outer mounting seat 1, and under the limiting action of the first sleeve 6, the rocker arm 3 swings relative to the outer mounting seat 1, so that the inner end of the rocker arm 3 moves toward the central axis 300, thereby achieving clamping and centering. The linear telescopic drive component drives the telescopic arm 18 to extend outward, so that the outer roller 21 contacts the inner wall of the newly added rotating body 400, so as to achieve support and centering of the newly added rotating body 400, thereby making the newly added rotating body 400 highly coaxial with the main rotating body 200.

[0050] In the present embodiment, the multiple centering mechanisms can quickly perform centering and clamping operations on the central shafts 300 of different diameters by driving the rocking arm 3 through the rotation of the inner mounting seat 2. The support radius can be quickly adjusted according to the inner diameter of the newly added rotating body 400 through the support telescopic mechanism, and the newly added rotating body 400 can be concentric with the main rotating body 200, thereby achieving the assembly standardization in the composite material rotating body forming process, improving the coaxiality and assembly accuracy of the new and old rotating body structures, and solving the problem that the main rotating body 200 needs to be assembled repeatedly during the composite material rotating body forming process, thereby failing to ensure the coaxiality of the new and old rotating body structures.

[0051] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A composite material rotating body inner and outer double centering fixture, characterized in that: It includes an inner mounting seat, an outer mounting seat, a driving mechanism, at least three centering mechanisms and at least three supporting and telescopic mechanisms. The outer mounting seat is rotatably sleeved on the outside of the inner mounting seat, and multiple supporting and telescopic mechanisms are sequentially arranged on the outside of the outer mounting seat along the circumferential direction; a through hole is arranged in the middle of the inner mounting seat, and the centering mechanism includes a rocker arm and a first sleeve, multiple first sleeves of multiple centering mechanisms are sequentially hinged to the inner mounting seat along the circumferential direction, one end of multiple rocker arms of multiple centering mechanisms are sequentially hinged to the outer mounting seat along the circumferential direction, and the other end of each rocker arm is slidably sleeved in one of the first sleeves and can extend into the through hole; the driving mechanism is arranged on the outer mounting seat, and is used to drive the inner mounting seat to rotate relative to the outer mounting seat.

2. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The supporting telescopic mechanism includes a second sleeve, a linear telescopic driving component and a telescopic arm, one end of the second sleeve is fixed to the outside of the outer mounting seat, the telescopic arm is slidably sleeved inside the other end of the second sleeve, and the linear telescopic driving component is arranged in the second sleeve and is used to drive the telescopic arm to move relative to the second sleeve.

3. The composite material rotating body inner and outer double centering fixture according to claim 2, characterized in that: The supporting telescopic mechanism further comprises an outer roller, which is rotatably mounted on one end of the telescopic arm away from the outer mounting seat, and the axial direction of the outer roller is consistent with the axial direction of the outer mounting seat.

4. The composite material rotating body inner and outer double centering fixture according to claim 2, characterized in that: The linear telescopic driving component is a hydraulic cylinder, the cylinder body of the hydraulic cylinder is fixed in the second sleeve, and the piston rod of the hydraulic cylinder is fixedly connected to the telescopic arm.

5. The composite material rotating body inner and outer double centering fixture according to claim 4, characterized in that: The supporting telescopic mechanism also includes connecting bolts and connecting nuts. Strip holes are provided on both sides of the second sleeve. A receiving groove is provided at one end of the telescopic arm close to the outer mounting seat. The piston rod of the hydraulic cylinder extends into the receiving groove. The connecting bolt passes through one of the strip holes, one side of the telescopic arm, the piston rod of the hydraulic cylinder, the other side of the telescopic arm and another strip hole in sequence and is installed with the connecting nut.

6. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The centering mechanism further comprises an inner roller, which is rotatably mounted on one end of the rocker arm extending into the through hole, and the axial direction of the inner roller is consistent with the axial direction of the inner mounting seat.

7. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The driving mechanism includes a first mounting block, a second mounting block and a lead screw, an extension plate is arranged outside the inner mounting seat, the second mounting block is hinged to the extension plate, a threaded hole is arranged on the second mounting block, the first mounting block is hinged to the outer mounting seat, one end of the lead screw is rotatably mounted on the first mounting block, and the other end of the lead screw is mounted in the threaded hole and extends to the outside of the second mounting block.

8. The composite material rotating body inner and outer double centering fixture according to claim 7, characterized in that: The inner mounting seat includes a first cylinder, a second cylinder and an annular base plate which are coaxially arranged in sequence from top to bottom, the extension plate is arranged on one side of the outside of the first cylinder, the outer diameters of the first cylinder and the annular base plate are both larger than the outer diameter of the second cylinder, the outer mounting seat is rotatably sleeved on the outside of the second cylinder, and the annular base plate is fixed to the second cylinder by a plurality of fixing bolts; a plurality of mounting holes are sequentially arranged on the first cylinder along the circumferential direction, the mounting holes pass through both sides of the first cylinder, each of the first sleeves is located in one of the mounting holes and is hinged to the first cylinder.

9. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The plurality of supporting and telescopic mechanisms are evenly arranged in sequence along the circumferential direction on the outside of the outer mounting seat, the plurality of the first sleeves of the plurality of the centering mechanisms are evenly hinged to the inner mounting seat in sequence along the circumferential direction, and one ends of the plurality of the rocker arms of the plurality of the centering mechanisms are evenly hinged to the outer mounting seat in sequence along the circumferential direction.

10. The composite material rotating body inner and outer double centering fixture according to claim 1, characterized in that: The supporting and retracting mechanisms and the centering mechanisms are both provided in three numbers.

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