A type of fixed tooling

Abstract

This application provides a fixing fixture, including an object to be fixed, a carrier, and a limiting mechanism. The carrier is fitted onto the object to be fixed, and the limiting mechanism is connected to the object to be fixed, used to limit the object to be fixed in the circumferential direction of the carrier. By setting the limiting mechanism and connecting it to the guide vane, the guide vane can be limited in the circumferential direction of the bevel gear, so that the guide vane can be fixed at a preset angle. This prevents the guide vane from rotating relative to the bevel gear during drilling, improving the installation accuracy of the guide vane. At the same time, it ensures that the angles of multiple guide vanes in the guide vane adjuster are consistent, improving the stability of the guide vane adjuster's operation, and thus improving the flow control accuracy of the compressor.

Description

Technical Field

[0001] This application belongs to the field of guide vane adjuster technology, specifically relating to a fixing fixture. Background Technology

[0002] The guide vane adjuster is one of the main control components of a centrifugal compressor. During compressor start-up, shutdown, or partial load operation, it controls the compressor's intake air volume by adjusting the rotation angle of the inlet guide vanes, ensuring safe unit operation and improving unit efficiency. The guide vane adjuster includes a bevel gear disc, bevel gears, drive guide vanes, and driven guide vanes. The guide vane angle adjustment method is as follows: rotating the drive guide vane drives the bevel gear disc and bevel gear to rotate, thereby simultaneously adjusting the angles of the other driven guide vanes.

[0003] Currently, during the assembly of the guide vane adjuster, the guide vane angle must first be fixed to a vertical position. Then, holes are drilled in both the guide vane and the bevel gear on it to insert pins, which are used to fix the bevel gear and guide vane together. Because the guide vane is in a free state in the circumferential direction of the bevel gear, it is easy for the guide vane to rotate relative to the bevel gear during drilling. This results in different installation angles between the multiple guide vanes after installation, causing the guide vane adjuster to malfunction. Summary of the Invention

[0004] Therefore, the technical problem to be solved by this application is to provide a fixed tooling that can limit the guide vane in the circumferential direction of the bevel gear by setting a limiting mechanism, so that the guide vane can be fixed at a preset angle during drilling, thereby improving the installation accuracy of the guide vane and thus improving the stability of the guide vane adjuster.

[0005] To address the aforementioned problems, this application provides a fixing fixture, comprising an object to be fixed, a carrier, and a limiting mechanism. The carrier is sleeved on the object to be fixed, and the limiting mechanism is connected to the object to be fixed, used to limit the object to be fixed in the circumferential direction of the carrier.

[0006] Optionally, the fixing fixture further includes a base plate and a support mechanism, the support mechanism being disposed on the base plate, and the object to be fixed being connected to the support mechanism.

[0007] Optionally, the object to be fixed includes a first guide vane, the end of which has a fixing block, and the limiting mechanism includes a first gauge block, which is disposed on the base plate. The end of the first gauge block away from the base plate has a stop portion, which abuts against the fixing block. The stop portion is used to limit the fixing block in the circumferential direction of the carrier.

[0008] Optionally, the fixing block is square, the first guide vane and the diagonal surface of the fixing block are coplanar, and the angle between the stop and the horizontal plane is 45°.

[0009] Optionally, the object to be fixed further includes a second guide vane, the end of which is provided with a limiting groove. The limiting mechanism includes a second gauge block, which is disposed on the base plate. The end of the second gauge block away from the base plate has a limiting block. The limiting block has the same shape and size as the limiting groove, and the limiting block is embedded in the limiting groove.

[0010] Optionally, the limiting block and the limiting groove are square, and the angle between the diagonal surfaces of the limiting block and the limiting groove and the second guide vane is 45°.

[0011] Optionally, the second gauge block has a groove that extends through the second gauge block along the axial direction of the carrier.

[0012] Optionally, the fixing fixture further includes a locking mechanism, which includes a fixing plate, a pull rod, and a locking nut. The fixing plate is located on the side of the limiting mechanism away from the object to be fixed. The fixing plate has a through hole, and the pull rod passes through the through hole through the fixing plate and is connected to the object to be fixed. The locking nut is located on the side of the fixing plate away from the limiting mechanism, and the locking nut is sleeved on the pull rod and threadedly connected to the pull rod.

[0013] Optionally, the fixed fixture further includes a transmission disc, which is disposed on the side of the carrier away from the base plate. The transmission disc is connected to the carrier and can limit the carrier in the circumferential direction.

[0014] Optionally, the support mechanism includes a first support member and a second support member, the first support member and the second support member being respectively disposed on both sides of the carrier, one end of the carrier abutting against the first support member, and the other end abutting against the second support member.

[0015] Beneficial effects

[0016] The fixing fixture provided in the embodiments of the present invention mainly limits the guide vane in the circumferential direction of the bevel gear by setting a limiting mechanism and connecting the limiting mechanism with the guide vane, so that the guide vane can be fixed at a preset angle. This can prevent the guide vane from rotating relative to the bevel gear during drilling, improve the installation accuracy of the guide vane, and at the same time ensure that the angles of multiple guide vanes in the guide vane adjuster are consistent, improve the working stability of the guide vane adjuster, and thus improve the flow control accuracy of the compressor. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of the fixing fixture according to an embodiment of this application;

[0018] Figure 2 for Figure 1 Sectional view at point AA;

[0019] Figure 3 for Figure 1 Sectional view at point BB;

[0020] Figure 4 for Figure 1 Sectional view at CC;

[0021] Figure 5 for Figure 1 Sectional view at point DD;

[0022] Figure 6 This is the front view of the second gauge block in an embodiment of this application;

[0023] Figure 7 This is a side view of the second gauge block according to an embodiment of this application;

[0024] Figure 8 This is a top view of the second gauge block in an embodiment of this application.

[0025] The reference numerals in the attached figures are as follows:

[0026] 1. Carrier; 2. First guide vane; 21. Fixing block; 3. Second guide vane; 31. Limiting groove; 4. First gauge block; 41. Stop part; 5. Second gauge block; 51. Limiting block; 6. Fixing plate; 7. Pull rod; 8. Locking nut; 9. First support member; 10. Second support member; 11. Base plate; 12. Pressure plate. Detailed Implementation

[0027] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting the present invention.

[0028] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0029] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0030] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0031] See also Figures 1 to 8 As shown, according to an embodiment of this application, a fixing fixture is provided, including an object to be fixed, a carrier 1, and a limiting mechanism. The carrier 1 is sleeved on the object to be fixed, and the limiting mechanism is connected to the object to be fixed and is used to limit the object to be fixed in the circumferential direction of the carrier 1.

[0032] The fixing fixture provided in the embodiments of the present invention mainly limits the guide vane in the circumferential direction of the bevel gear by setting a limiting mechanism and connecting the limiting mechanism with the guide vane, so that the guide vane can be fixed at a preset angle. This can prevent the guide vane from rotating relative to the bevel gear during drilling, improve the installation accuracy of the guide vane, and at the same time ensure that the angles of multiple guide vanes in the guide vane adjuster are consistent, improve the working stability of the guide vane adjuster, and thus improve the flow control accuracy of the compressor.

[0033] The object to be fixed can be a workpiece that needs to be drilled.

[0034] Among them, the carrier 1 can be a workpiece connected to the object to be fixed, that is, a workpiece that needs to be drilled at the same time.

[0035] Specifically, in this embodiment, the object to be fixed is a guide vane, the carrier 1 is a bevel gear, the guide vane includes blades and a rotating shaft, and the bevel gear is sleeved on the rotating shaft.

[0036] Among them, the fixing fixture can be a tool that can fix the object to be fixed, so that the object to be fixed can be stably set on the fixing fixture for drilling.

[0037] The fixing fixture includes a limiting mechanism, which is connected to the object to be fixed.

[0038] Specifically, the object to be fixed is a guide vane, which includes a blade and a rotating shaft. In one embodiment, a limiting mechanism is positioned on both sides of the blade and abuts against it to limit the blade in the circumferential direction of the rotating shaft, thus preventing the blade from rotating. In another embodiment, the limiting mechanism is connected to the rotating shaft, with the rotating shaft embedded within the limiting mechanism to limit the rotating shaft in the circumferential direction, thus preventing the rotating shaft from rotating. In this application, by setting a limiting mechanism and connecting it to the object to be fixed, the object to be fixed can be limited in the circumferential direction of the carrier 1, thus preventing the object from rotating relative to the carrier 1, thereby improving the installation accuracy of the object to be fixed.

[0039] The fixture also includes a base plate 11 and a support mechanism. The support mechanism is mounted on the base plate 11, and the object to be fixed is connected to the support mechanism.

[0040] By setting the base plate 11, a stable installation position is provided for the object to be fixed. At the same time, by setting the support mechanism and connecting the support mechanism to the object to be fixed, the object to be fixed can be fixed at a certain height above the base plate 11, thereby improving the stability of the drilling operation.

[0041] The fixed fixture also includes a base plate 11, which is generally ring-shaped, etc., and this application does not make any further limitations.

[0042] Specifically, the object to be fixed is set on the base plate 11, which provides a stable installation position for the object.

[0043] It is understood that the guide vane adjuster has multiple guide vanes, including a driving guide vane and other driven guide vanes. One driving guide vane can be provided, and several driven guide vanes can be provided. In this embodiment, one driving guide vane and four driven guide vanes are provided, evenly arranged along the circumferential direction of the base. The guide vane adjuster also includes several bevel gears. In this embodiment, five bevel gears are provided, each corresponding to one of the driving guide vane and the four driven guide vanes.

[0044] Specifically, it can be understood that the fixed fixture can ensure that the angles of the driving guide vane and several driven guide vanes in the guide vane regulator are consistent after installation, thereby improving the stability of the guide vane regulator and thus improving the flow control accuracy of the compressor.

[0045] The fixing fixture also includes a support mechanism, which is located on the side of the base near the object to be fixed. The support mechanism is connected to the base, and the connection method can be bolt connection or welding, etc. This application does not make further limitations.

[0046] Specifically, the object to be fixed is placed on the support mechanism, which can fix the object at a preset height and limit the object in the vertical direction to improve the stability of the drilling operation.

[0047] The support mechanism includes a first support member 9 and a second support member 10, which are respectively disposed on both sides of the carrier 1. One end of the carrier 1 abuts against the first support member 9, and the other end abuts against the second support member 10. By setting the first support member 9 and the second support member 10, the carrier 1 is positioned between the first support member 9 and the second support member 10 and abuts against the first support member 9 and the second support member 10 respectively. This allows for axial positioning of the carrier 1, preventing it from shaking during drilling and improving the stability of the drilling operation.

[0048] The first support member 9 and the second support member 10 are generally ring-shaped metal plates, etc. The first support member 9 and the second support member 10 are set on the base and connected to the object to be fixed.

[0049] Specifically, the first support member 9 has a first through hole, and the second support member 10 has a second through hole. The central axes of the first and second through holes are collinear, so that the object to be fixed can pass through the first support member 9 and the second support member 10 sequentially through the first and second through holes. The first support member 9 and the second support member 10 can fix the object to be fixed and also limit the object to be fixed in the vertical direction, thereby preventing the object to be fixed from shaking during drilling and improving the stability of the drilling operation.

[0050] The object to be fixed includes a first guide vane 2, the end of which has a fixing block 21. The limiting mechanism includes a first measuring block 4, which is disposed on the base plate 11. The end of the first measuring block 4 away from the base plate 11 has a stop part 41, which abuts against the fixing block 21. The stop part 41 is used to limit the fixing block 21 in the circumferential direction of the carrier 1.

[0051] By setting the first gauge block 4 and making the stop part 41 of the first gauge block 4 abut against the fixed block 21, the fixed block 21 can be limited in the circumferential direction of the carrier 1, thereby preventing the first guide vane 2 from rotating relative to the carrier 1 during the drilling process and improving the installation accuracy of the first guide vane 2.

[0052] Among them, the first guide vane 2 can be a driving guide vane.

[0053] The first guide vane 2 has a fixing block 21 at its end. The fixing block 21 can be rectangular, square, or triangular, etc., and this application does not make any further limitations. In the embodiment of this application, the fixing block 21 is a square.

[0054] The limiting mechanism includes a first gauge block 4, which can be elongated. One end of the first gauge block 4 is connected to the base, and the other end abuts against the fixing block 21.

[0055] Specifically, the first gauge block 4 has a stop portion 41 at one end near the fixed block 21. The stop portion 41 can be a slot or a stop surface, etc., and this application does not make further limitations. In the embodiment of this application, the stop portion 41 is a stop surface, and the stop surface abuts against the outer wall of the fixed part to limit the fixed part in the circumferential direction of the carrier 1, thereby preventing the first guide vane 2 from rotating during drilling.

[0056] The first guide vane 2 and the fixed block 21 are coplanar, and the angle between the stop part 41 and the horizontal plane is 45°. By making the angle between the first guide vane 2 and the stop part 41 45°, the first guide vane 2 can be perpendicular to the horizontal plane, that is, the first guide vane 2 is vertically set.

[0057] The object to be fixed also includes a second guide vane 3. The end of the second guide vane 3 is provided with a limiting groove 31. The limiting mechanism includes a second gauge block 5. The second gauge block 5 is set on the base plate 11. The end of the second gauge block 5 away from the base plate 11 has a limiting block 51. The limiting block 51 has the same shape and size as the limiting groove 31. The limiting block 51 is embedded in the limiting groove 31.

[0058] By setting a second gauge block 5 and embedding the limiting block 51 on the second gauge block 5 into the limiting groove 31 on the second guide vane 3 which has the same shape as the limiting block 51, the second guide vane 3 can be limited in the circumferential direction of the carrier 1, thereby preventing the second guide vane 3 from rotating relative to the carrier 1 during the drilling process and improving the installation accuracy of the second guide vane 3.

[0059] Among them, the second guide vane 3 can be a driven guide vane.

[0060] In this embodiment, a limiting groove 31 is formed at the end of the second guide vane 3. The limiting groove 31 extends along the length direction of the second guide vane 3. The limiting groove 31 can be rectangular, square, or triangular, etc., and this application does not make further limitations. In this embodiment, the limiting groove 31 is square.

[0061] The limiting mechanism includes a second gauge block 5, which is roughly L-shaped. One end of the second gauge block 5 is connected to the base, and the other end is embedded in the limiting groove 31.

[0062] Specifically, the second gauge block 5 has a limiting block 51 at one end near the second guide vane 3. The limiting block 51 can be rectangular, square, or triangular, etc., and this application does not make further limitations. In the embodiment of this application, the limiting block 51 is square. The limiting block 51 can be inserted into the limiting groove 31. At the same time, both the limiting block 51 and the limiting groove 31 are square and have the same size. It can be understood that the limiting block 51 is fixed in the limiting groove 31. That is, when the second gauge block 5 is fixed differently, the second guide vane 3 is also fixed differently, thereby preventing the second guide vane 3 from rotating during drilling.

[0063] The angle between the diagonal surfaces of the limiting block 51 and the limiting groove 31 and the second guide vane 3 is 45°. This ensures that the second guide vane 3 is perpendicular to the horizontal plane, i.e., the second guide vane 3 is vertically positioned.

[0064] Specifically, the limiting mechanism ensures that the angles of the first guide vane 2 and the second guide vane 3 are consistent during assembly. In this embodiment, both the first guide vane 2 and the second guide vane 3 are perpendicular to the horizontal plane, and the assembled guide vane adjuster is in a fully open state. It is understood that the guide vane adjuster's opening is controlled by a host computer. The host computer needs to set a guide vane adjuster opening threshold, i.e., a maximum value. By setting the first guide vane 2 and the second guide vane 3 to be perpendicular to the horizontal plane, the state of the assembled guide vane adjuster corresponds to the guide vane adjuster opening threshold recorded in the host computer. This ensures that the host computer's control of the guide vane opening matches the actual angle to the greatest extent possible, thereby improving flow control accuracy and enabling the compressor to operate stably.

[0065] The fixing fixture also includes a locking mechanism, which includes a fixing plate 6, a pull rod 7, and a locking nut 8. The fixing plate 6 is located on the side of the limiting mechanism away from the object to be fixed. The fixing plate 6 has a through hole. The pull rod 7 passes through the through hole, passes through the fixing plate 6, and is connected to the object to be fixed. The locking nut 8 is located on the side of the fixing plate 6 away from the limiting mechanism. The locking nut 8 is sleeved on the pull rod 7 and threadedly connected to the pull rod 7.

[0066] By setting a locking mechanism and connecting the locking mechanism to the first guide vane 2 and the second guide vane 3 respectively, the first guide vane 2 and the second guide vane 3 can be limited in the axial direction of the carrier 1, thereby preventing the first guide vane 2 and the second guide vane 3 from shaking during drilling, improving the stability of drilling work, and thus improving the assembly accuracy of the guide vane adjuster.

[0067] The locking mechanism includes a fixing plate 6, which can be a rectangular metal plate, etc. The fixing plate 6 is located on the side of the limiting mechanism away from the object to be fixed.

[0068] Specifically, in this embodiment of the application, five fixing plates 6 are provided, one of which is located on the side of the first gauge block 4 away from the first guide vane 2, and the other four fixing plates 6 are respectively located on the side of the four second gauge blocks 5 away from the four second guide vanes 3.

[0069] The locking mechanism also includes a pull rod 7, which is connected to the object to be fixed.

[0070] Specifically, in this embodiment, five pull rods 7 are provided, and through holes are provided on the fixing plate 6. One pull rod 7 passes through the fixing plate 6 through the through hole and is connected to the first guide vane 2; the other four pull rods 7 pass through the fixing plate 6 through the through holes and are connected to the four second guide vanes 3 one by one. The connection method is threaded connection.

[0071] The locking mechanism also includes a locking nut 8, which is connected to the fixing plate 6. The locking nut 8 is located on the side of the fixing plate 6 away from the object to be fixed.

[0072] Specifically, the end of the pull rod 7 furthest from the object to be fixed is provided with an external thread. The locking nut 8 is sleeved on the pull rod 7 and threadedly connected to the pull rod 7, which allows the pull rod 7 to be rotated. The pull rod 7 can move along the axial direction of the pull rod 7 and be fixed in a preset position, so that the first guide vane 2 and the second guide vane 3 connected to the pull rod 7 can be fixed in the preset position. This can prevent the first guide vane 2 and the second guide vane 3 from shaking during drilling, improve the stability of the drilling operation, and thus improve the assembly accuracy of the guide vane adjuster.

[0073] The fixed fixture also includes a pressure plate 12, which is located on the side of the support mechanism away from the base plate 11.

[0074] Specifically, the pressure plate 12 is connected to the base plate 11. In this embodiment, the pressure plate 12 is connected to the base plate 11 by bolts. Both the pressure plate 12 and the base plate 11 are circular. The object to be fixed, the carrier 1, the support mechanism, the limiting mechanism, and the locking mechanism are disposed between the pressure plate 12 and the base plate 11. One end of the limiting mechanism abuts against the pressure plate 12, and the other end abuts against the base plate 11. By setting the pressure plate 12, the support mechanism can be limited in the axial direction of the base plate 11 to fix the support mechanism, thereby preventing the support mechanism from shaking during drilling and improving the stability of the fixing fixture.

[0075] The second gauge block 5 has a groove that extends through the second gauge block 5 along the axial direction of the carrier 1.

[0076] By creating a groove on the second gauge block 5 and extending the groove through the second gauge block 5 along the axial direction of the carrier 1, the pull rod 7 can pass through the groove to connect with the second guide vane 3, thereby preventing the second guide vane 3 from shaking during drilling, improving the stability of the drilling operation, and thus improving the assembly accuracy of the guide vane adjuster.

[0077] The groove is roughly U-shaped.

[0078] Specifically, the groove extends along the length of the pull rod 7 and passes through the second gauge block 5.

[0079] The fixed fixture also includes a transmission disc, which is located on the side of the carrier 1 away from the base plate 11. The transmission disc is connected to the carrier 1 and can limit the carrier 1 in the circumferential direction.

[0080] By setting a transmission disk on the side of the carrier 1 away from the base plate 11 and connecting the transmission disk to the carrier 1, the carrier 1 can be limited in the circumferential direction, thereby preventing the carrier 1 from rotating relative to the first guide vane 2 and the second guide vane 3 during drilling, improving the stability of the drilling operation, and thus improving the assembly accuracy of the guide vane adjuster.

[0081] In this embodiment, the transmission disc is a bevel gear disc and the carrier 1 is a bevel gear. The transmission disc meshes with the carrier 1, which can fix the installation angle of the carrier 1 so that the assembly of the guide vane adjuster can be carried out smoothly. At the same time, it can ensure that the assembled carrier 1 can transmit normally, thus providing stability for the operation of the guide vane adjuster.

[0082] The fixing fixture provided in the embodiments of the present invention mainly limits the guide vane in the circumferential direction of the bevel gear by setting a limiting mechanism and connecting the limiting mechanism with the guide vane, so that the guide vane can be fixed at a preset angle. This can prevent the guide vane from rotating relative to the bevel gear during drilling, improve the installation accuracy of the guide vane, and at the same time ensure that the angles of multiple guide vanes in the guide vane adjuster are consistent, improve the working stability of the guide vane adjuster, and thus improve the flow control accuracy of the compressor.

[0083] It will be readily understood by those skilled in the art that the aforementioned advantageous methods can be freely combined and superimposed without conflict.

[0084] The above are merely preferred embodiments of this application and are not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application. The above are merely preferred embodiments of this application. It should be noted that for those skilled in the art, several improvements and modifications can be made without departing from the technical principles of this application, and these improvements and modifications should also be considered within the protection scope of this application.

Claims

1. A fixing fixture for drilling and positioning the guide vane and bevel gear in a guide vane adjuster, characterized in that, The system includes an object to be fixed, a carrier (1), a limiting mechanism, a transmission disc, a base plate (11), and a support mechanism. The carrier (1) is a bevel gear, which is fitted onto the object to be fixed. The object to be fixed includes a first guide vane (2) and a second guide vane (3). The end of the first guide vane (2) has a square fixing block (21), and the end of the second guide vane (3) has a square limiting groove (31). The limiting mechanism is connected to the object to be fixed and is used to limit the object to be fixed in the circumferential direction of the carrier (1). The limiting mechanism includes a first gauge block (4) and a second gauge block (5). The first gauge block (4) is disposed on the base plate (11), and the end of the first gauge block (4) away from the base plate (11) has a 45° angle with the horizontal plane. An angled stop (41) is provided, which abuts against the fixed block (21), and the first guide vane (2) and the diagonal surface of the fixed block (21) are coplanar; the second gauge block (5) is provided on the base plate (11), and the end of the second gauge block (5) away from the base plate (11) has a limiting block (51) with the same shape and size as the limiting groove (31), the limiting block (51) is embedded in the limiting groove (31), and the angle between the diagonal surface of the limiting block (51) and the limiting groove (31) and the second guide vane (3) is 45°, and the second gauge block (5) is provided with a section along the carrier (1) The axial direction of the groove of the second gauge block (5) is through the groove; the support mechanism is set on the base plate (11), the support mechanism includes a first support member (9) and a second support member (10), the first support member (9) and the second support member (10) are respectively set on both sides of the carrier (1), one end of the carrier (1) abuts against the first support member (9), and the other end abuts against the second support member (10); the transmission disk is set on the side of the carrier (1) away from the base plate (11), the transmission disk meshes with the carrier (1), and is used to limit the carrier (1) in the circumferential direction of the carrier (1).

2. The fixing fixture according to claim 1, characterized in that, The fixing fixture also includes a locking mechanism, which includes a fixing plate (6), a pull rod (7), and a locking nut (8). The fixing plate (6) is located on the side of the limiting mechanism away from the object to be fixed. A through hole is provided on the fixing plate (6). The pull rod (7) passes through the through hole through the fixing plate (6) and is connected to the object to be fixed. The locking nut (8) is located on the side of the fixing plate (6) away from the limiting mechanism. The locking nut (8) is sleeved on the pull rod (7) and threadedly connected to the pull rod (7).

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