Multi-axis calibration platform of X-ray equipment

Abstract

The utility model discloses a multi-axis calibration platform of X-ray equipment. The multi-axis calibration platform comprises a hub, the clamping assembly is located below the hub and comprises a clamp shell, clamping plates, a threaded rod, a rotating block and a supporting column, the clamp shell is arranged below the hub, the clamping plates are located on the two sides of the hub, threaded grooves are formed in the clamping plates, and the threaded rod is in threaded connection with the threaded grooves. The hub detection device has the beneficial effects that the clamping assembly is used for fixing the hub on the rotating table, multi-angle detection of the hub is facilitated, the rotating assembly is arranged, so that the hub can rotate in a clamped state, the clamped part of the hub is changed, each part of the hub can be accurately observed, and the detection accuracy of the hub is improved. Therefore, interference on detection due to shielding of the clamp is avoided, a detector can observe a searchlighting image conveniently, and the accuracy and reliability of ray detection quality are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of X-ray, in particular to a multi-axis calibration platform for an X-ray device. Background Art

[0002] X-ray detection is a non-destructive testing technology that uses X-rays to penetrate an object and obtain information about the internal structure, defects or composition of the object based on the absorption and scattering of the X-rays within the object. It is widely used in industrial production and can detect defects such as pores, shrinkage cavities, porosity, and inclusions inside castings. This can prevent defective castings from entering subsequent production processes or the market, ensuring the reliability of the products. For the ray inspection of automobile wheels, the wheel needs to be fixed to a rotating table by a fixture for multi-directional inspection. However, if a metal fixture is used to fix the wheel, the fixture will cause obvious occlusion and interference in the X-ray detection image, covering up the display of local defects of the wheel, resulting in misjudgment or missed detection. The image of the fixture may coincide with the fine defects inside the wheel, making it difficult for the inspectors to distinguish the true defects, thereby affecting the accuracy and reliability of the X-ray detection of the wheel quality. Summary of the Utility Model

[0003] The purpose of this part is to outline some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Simplifications or omissions may be made in this part, as well as in the abstract and the title of the utility model of this application, to avoid obscuring the purpose of this part, the abstract and the title of the utility model. However, such simplifications or omissions shall not be used to limit the scope of the utility model.

[0004] In view of the above and / or existing problems in the multi-axis calibration platform of an X-ray device, the present utility model is proposed.

[0005] Therefore, the problem to be solved by the present utility model is to reduce the detection accuracy when a metal fixture is used to assist in detecting defects of a wheel by X-rays.

[0006] To solve the above technical problems, the present utility model provides the following technical solution: a multi-axis calibration platform for an X-ray device, which includes a wheel;

[0007] A clamping assembly, located below the wheel, includes a fixture housing, clamping plates, threaded rods, rotating blocks, and support columns. The fixture housing is arranged below the wheel. The clamping plates are located on both sides of the wheel. The clamping plates are provided with threaded grooves. The threaded rods are threadedly connected to the threaded grooves. A through groove is provided on the outer wall of the fixture housing. One end of the threaded rod is movably connected to the inner wall of the fixture housing, and the other end is inserted into the through groove. The rotating block is fixed to one end of the threaded rod. The support column is fixed to the top of the fixture housing;

[0008] The rotating assembly is disposed inside the fixture housing and includes a roller, a rotating shaft, a pressing plate, a moving plate, a rack, a gear, and a spring. The roller is disposed below the hub. The rotating shaft is inserted into the roller, and one end of the rotating shaft is movably connected to the fixture housing. The clamping plate is provided with a rotating groove, and the rotating shaft is engaged with the rotating groove. The pressing plate is located on one side of the support column. The moving plate is fixed to the bottom of the pressing plate. The rack is fixed to one side of the moving plate. The gear is sleeved on the rotating shaft. The spring is disposed outside the rotating shaft.

[0009] As a preferred embodiment of the multi-axis calibration platform of the X-ray device of the present invention, wherein: a pushing plate is fixed to one side of the clamping plate, a pushing groove is formed in the moving plate, and the pushing plate is engaged with the pushing groove.

[0010] As a preferred embodiment of the multi-axis calibration platform of the X-ray device of the present invention, wherein: the rotating assembly further includes a transmission member, including a ratchet wheel, a pawl, and a torsion spring. The ratchet wheel is fixed to the inner wall of the gear. A fixing groove is formed in the rotating shaft. The pawl is disposed in the fixing groove. Both ends of the torsion spring are fixed to the pawl and the inner wall of the fixing groove respectively.

[0011] As a preferred embodiment of the multi-axis calibration platform of the X-ray device of the present invention, wherein: a spring is fixed to the bottom of the pressing plate, and the other end of the spring is fixed to the fixture housing.

[0012] As a preferred embodiment of the multi-axis calibration platform of the X-ray device of the present invention, wherein: a fixing column is disposed on one side of the spring, and the fixing column is fixed to the inner wall of the fixture housing.

[0013] As a preferred embodiment of the multi-axis calibration platform of the X-ray device of the present invention, wherein: a friction block is fixed to the outside of the roller.

[0014] As a preferred embodiment of the multi-axis calibration platform of the X-ray device of the present invention, wherein: the threads on the threaded rod are divided into two sections, and the thread directions are set in opposite directions.

[0015] As a preferred embodiment of the multi-axis calibration platform of the X-ray device of the present invention, wherein: a rolling groove is formed in the support column, a roller is disposed in the rolling groove, and the roller is rotatably connected to the rolling groove.

[0016] As a preferred embodiment of the multi-axis calibration platform of the X-ray device of the present invention, wherein: a moving groove is formed in the fixture housing, and the clamping plate is slidably connected to the moving groove.

[0017] As a preferred solution of the multi-axis calibration platform of the X-ray device described in the present utility model, it further includes a detection component located outside the clamping component, which includes a rotating table, a protective chamber, and a transmitting device. The rotating table is arranged below the clamping component, the protective chamber is located outside the rotating table, and the transmitting device is fixed on the inner wall of the protective chamber.

[0018] The beneficial effects of the present utility model are as follows: Through the setting of the clamping component, it is used to fix the wheel hub on the rotating table, facilitating multi-angle detection of the wheel hub. The setting of the rotating component enables the wheel hub to rotate while being clamped, thereby changing the clamped part of the wheel hub, so that all parts of the wheel hub can be accurately observed, avoiding interference with detection due to fixture occlusion, facilitating the detection personnel to observe the radiographic image of the wheel hub, and improving the accuracy and reliability of the ray detection quality. Brief Description of the Drawings

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. Among them:

[0020] Figure 1 It is the overall structure diagram of the multi-axis calibration platform of the X-ray device.

[0021] Figure 2 It is the sectional structure diagram of the protective chamber of the multi-axis calibration platform of the X-ray device.

[0022] Figure 3 It is the structure diagram of the clamping component of the multi-axis calibration platform of the X-ray device.

[0023] Figure 4 It is the sectional structure diagram of the fixture housing of the multi-axis calibration platform of the X-ray device.

[0024] Figure 5 It is the front view structure diagram of the rotating component of the multi-axis calibration platform of the X-ray device.

[0025] Figure 6 It is the structure diagram of the clamping plate of the multi-axis calibration platform of the X-ray device.

[0026] Figure 7 It is the sectional structure diagram of the gear of the multi-axis calibration platform of the X-ray device.

[0027] Figure 8 For the multi-axis calibration platform of the X-ray device Figure 7 The enlarged partial structure diagram at position A. Detailed Description of the Preferred Embodiment

[0028] To make the above objects, features, and advantages of the present utility model more obvious and understandable, the following provides a detailed description of the specific implementation manners of the present utility model in conjunction with the accompanying drawings of the specification.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present utility model. However, the present utility model can also be implemented in other ways different from those described herein. Those skilled in the art can make similar generalizations without departing from the connotation of the present utility model. Therefore, the present utility model is not limited by the specific embodiments disclosed below.

[0030] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure, or characteristic that can be included in at least one implementation manner of the present utility model. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that mutually excludes other embodiments.

[0031] Embodiment 1

[0032] Referring to Figures 1-8 , which is the first embodiment of the present utility model. This embodiment provides a multi-axis calibration platform for an X-ray device, and the multi-axis calibration platform of the X-ray device includes a hub 400.

[0033] A clamping assembly 200, located below the hub 400, includes a clamp housing 201a, clamping plates 201b, a threaded rod 201c, a rotating block 201d, and a support column 201e. The clamp housing 201a is arranged below the hub 400, the clamping plates 201b are located on both sides of the hub 400, the clamping plates 201b are provided with threaded grooves 201b-1, the threaded rod 201c is threadedly connected to the threaded grooves 201b-1, and a through groove 201a-1 is provided on the outer wall of the clamp housing 201a. One end of the threaded rod 201c is movably connected to the inner wall of the clamp housing 201a, and the other end is inserted into the through groove 201a-1. The rotating block 201d is fixed to one end of the threaded rod 201c, and the support column 201e is fixed to the top of the clamp housing 201a.

[0034] There are two clamping plates 201b, and the shape of one side of the clamping plates 201b corresponds to that of the hub 400, so as to ensure that the clamping plates 201b can fix the hub 400 at the center of the clamp housing 201a. There are two support columns 201e. Through the arrangement of the support columns 201e, when the hub 400 is being clamped, the hub 400 is assisted in being supported.

[0035] One end of the threaded rod 201c is connected to the inner wall of the fixture housing 201a through a bearing. Through the cooperation of the threaded rod 201c and the thread groove 201b-1, when the threaded rod 201c rotates, it will drive the clamping plate 201b to move horizontally, thereby clamping the wheel hub 400 and preventing the wheel hub 400 from shifting during the detection, which may affect the detection efficiency.

[0036] Move the wheel hub 400 between the clamping plates 201b and move it downward until it contacts the support column 201e. Rotate the rotating block 201d, and the rotating block 201d drives the threaded rod 201c to rotate. Under the cooperation of the threaded rod 201c and the thread groove 201b-1, the clamping plate 201b moves towards the wheel hub 400 until the position of the wheel hub 400 is locked, thus avoiding the movement of the wheel hub 400 position and affecting the detection.

[0037] The rotating assembly 300 is arranged inside the fixture housing 201a and includes a roller 301a, a rotating shaft 301b, a pressing plate 301c, a moving plate 301d, a rack 301e, a gear 301f, and a spring 301g. The roller 301a is arranged below the wheel hub 400, the rotating shaft 301b is inserted into the roller 301a, and one end of the rotating shaft 301b is movably connected to the fixture housing 201a. The clamping plate 201b is provided with a rotating groove 201b-2, and the rotating shaft 301b is engaged with the rotating groove 201b-2. The pressing plate 301c is located on one side of the support column 201e, the moving plate 301d is fixed to the bottom of the pressing plate 301c, the rack 301e is fixed to one side of the moving plate 301d, the gear 301f is sleeved on the rotating shaft 301b, and the spring 301g is arranged outside the rotating shaft 301b.

[0038] The rotating shaft 301b is fixed inside the spring 301g. When the rotating shaft 301b rotates, it will tighten and charge the spring 301g. The moving plate 301d is L-shaped, and the fixture housing 201a is provided with a hole. The moving plate 301d is inserted into the hole. Through the arrangement of the moving plate 301d, the pressing plate 301c can drive the movement of the rack 301e, thereby driving the gear 301f to rotate.

[0039] One end of the rotating shaft 301b is connected to the inner wall of the fixture housing 201a through a bearing. There is a fixed block on one side of the gear 301f to prevent the gear 301f from shifting during rotation and avoid affecting other components.

[0040] The inner side of the spring 301g is fixed to the rotating shaft 301b.

[0041] When the hub 400 moves downward, the hub 400 continuously exerts a downward thrust on the pressure plate 301c, causing the pressure plate 301c to move downward, driving the moving plate 301d to move, causing the rack 301e to move, thereby driving the rotation of the gear 301f, causing the rotating shaft 301b to rotate, and simultaneously charging the spring 301g. Furthermore, when the spring 301g releases energy, it drives the rotating shaft 301b to rotate in the reverse direction, thereby driving the roller 301a to rotate slowly. Through the frictional effect, the hub 400 rotates slowly, changing the clamped position, and realizing the detection of each position of the hub 400, improving the accuracy of detecting the quality of the hub.

[0042] Embodiment 2

[0043] Refer to Figures 1-8 , which is the second embodiment of the present invention. This embodiment is based on the previous embodiment.

[0044] Specifically, a push plate 201f is fixed to one side of the clamping plate 201b. A push groove 301d-1 is formed in the moving plate 301d, and the push plate 201f is engaged with the push groove 301d-1.

[0045] The end face of the push plate 201f is inclined. The shape of the push groove 301d-1 corresponds to that of the push plate 201f. When the push plate 201f moves, the inclined surface will exert an extrusion force on the inner wall of the push groove 301d-1, driving the moving plate 301d to move downward and driving the rack 301e to move downward.

[0046] When the hub 400 moves downward to the support column 201e, the spring 301g has been fully charged. At this time, rotate the rotating block 201d to make the clamping plate 201b approach the hub 400. At this time, the clamping plate 201b will drive the push plate 201f to move toward the hub 400. When the push plate 201f contacts the moving plate 301d, the inclined surface of the push plate 201f exerts an extrusion force on the inner wall of the push groove 301d-1, driving the moving plate 301d to move downward and driving the rack 301e to move downward, causing the rack 301e to disengage from the gear 301f. At this time, the rack 301e and the gear 301f are not meshed, avoiding the rack 301e from obstructing the rotation of the gear 301f when the spring 301g releases energy to drive the gear 301f to rotate, thereby affecting the rotation of the hub 400.

[0047] Specifically, the rotating assembly 300 further includes a transmission member 302, including a ratchet wheel 302a, a pawl 302b, and a torsion spring 302c. The ratchet wheel 302a is fixed to the inner wall of the gear 301f. A fixing groove 301b-1 is formed in the rotating shaft 301b. The pawl 302b is arranged in the fixing groove 301b-1. Both ends of the torsion spring 302c are fixed to the pawl 302b and the inner wall of the fixing groove 301b-1 respectively.

[0048] The ratchet 302a, the pawl 302b and the torsion spring 302c are provided to control the engagement between the rotating shaft 301b and the gear 301f.

[0049] When the rack 301e moves downward to drive the gear 301f to rotate, through the cooperation of the ratchet 302a and the pawl 302b, the gear 301f can drive the rotating shaft 301b to rotate, so that the spring 301g is energized. When the rack 301e moves upward and drives the gear 301f to rotate in the opposite direction, the cooperation of the ratchet 302a and the pawl 302b makes the gear 301f unable to drive the rotating shaft 301b to rotate, so as to ensure that when the rack 301e moves upward, the spring 301g will not reverse, avoiding damage to the internal structure of the spring 301g.

[0050] Specifically, a spring 301h is fixed to the bottom of the pressing plate 301c, and the other end of the spring 301h is fixed to the fixture housing 201a.

[0051] Through the setting of the spring 301h, it is ensured that in the absence of other external forces, the pressing plate 301c will not contact the fixture housing 201a under the action of its own gravity.

[0052] Specifically, a fixing column 301i is provided on one side of the spring 301g, and the fixing column 301i is fixed to the inner wall of the fixture housing 201a.

[0053] A housing is provided outside the spring 301g, and the spring 301g is installed and supported by the housing. The other end of the fixing column 301i is fixed to the housing of the spring 301g. Through the setting of the fixing column 301i, it is used to fix the position of the spring 301g.

[0054] Specifically, a friction block 301j is fixed to the outside of the roller 301a.

[0055] There are multiple friction blocks 301j, which are annularly distributed on the outside of the roller 301a, increasing the friction between the roller 301a and the hub 400, ensuring that the rotation of the roller 301a can drive the hub 400 to rotate, and thus facilitating the detection of the hub 400.

[0056] Embodiment 3

[0057] Refer to Figures 1-8 , this is the third embodiment of the present utility model, and this embodiment is based on the first two embodiments.

[0058] Specifically, the threads on the threaded rod 201c are divided into two sections, and the thread directions are set in the opposite direction.

[0059] By setting the thread directions in the opposite direction, when the threaded rod 201c is rotated, the two clamping plates 201b will move simultaneously in the direction of approaching or departing from the hub 400.

[0060] Specifically, a rolling groove 201e-1 is formed in the support column 201e, a roller 201g is arranged in the rolling groove 201e-1, and the roller 201g is rotatably connected to the rolling groove 201e-1.

[0061] There are multiple rollers 201g, and the rollers 201g will rotate as the wheel hub 400 rotates, so as to prevent the support column 201e from hindering the rotation of the wheel hub 400.

[0062] Specifically, a moving groove 201a-2 is formed in the fixture housing 201a, and the clamping plate 201b is slidably connected to the moving groove 201a-2.

[0063] The arrangement of the moving groove 201a-2 is used to ensure the accurate clamping of the wheel hub 400 by the clamping plate 201b, and to prevent the inaccurate clamping of the wheel hub 400 due to the deviation of the position of the clamping plate 201b.

[0064] Specifically, it further includes a detection component 100, which is located outside the clamping component 200 and includes a rotating table 101, a protection chamber 102 and a transmitting device 103. The rotating table 101 is arranged below the clamping component 200, the protection chamber 102 is located outside the rotating table 101, and the transmitting device 103 is fixed to the inner wall of the protection chamber 102.

[0065] The rotating table 101 is used to achieve omnidirectional detection. The protection chamber 102 is used to protect the operator and the surrounding environment from radiation. A door body is arranged on one side of the protection chamber 102. The transmitting device 103 is used to emit X-rays. This is the prior art and will not be elaborated in this solution.

[0066] During use, the wheel hub 400 is moved between the clamping plates 201b and moved downward until it contacts the support column 201e. The wheel hub 400 continuously applies a downward thrust to the pressure plate 301c, causing the pressure plate 301c to move downward, driving the moving plate 301d to move, and causing the rack 301e to move downward. Since the rack 301e meshes with the gear 301f, the gear 301f rotates. Through the cooperation of the ratchet 302a and the pawl 302b, the gear 301f can drive the rotating shaft 301b to rotate, so as to charge the spring 301g.

[0067] When the mainspring 301g has been fully charged, rotate the rotating block 201d at this time, which drives the threaded rod 201c to rotate, causing the clamping plate 201b to approach the hub 400. At this time, the clamping plate 201b will drive the push plate 201f to move towards the hub 400. When the push plate 201f contacts the moving plate 301d, the inclined surface of the push plate 201f exerts an extrusion force on the inner wall of the pushing groove 301d-1, driving the moving plate 301d to move downward and driving the rack 301e to move downward, causing the rack 301e to disengage from the gear 301f. At this time, the rack 301e and the gear 301f are not engaged, preventing the rack 301e from obstructing the rotation of the gear 301f when the mainspring 301g releases energy to drive the gear 301f to rotate, thereby affecting the rotation of the hub 400.

[0068] After the mainspring 301g is fully charged, it will slowly release. When the hub 400 is clamped and the operator leaves the protection room 102, the mainspring 301g is still in the release state. At this time, the mainspring 301g drives the rotating shaft 301b to rotate in the reverse direction, thereby driving the roller 301a to rotate, and driving the hub 400 through friction, so as to change the clamped position of the hub 400 and facilitate improving the detection accuracy.

[0069] After the detection is completed, rotate the rotating block 201d to move away from the hub 400, and remove the hub 400 from the support column 201e. At this time, the hub 400 does not squeeze the pressure plate 301c, and the pressure plate 301c moves upward under the action of the spring 301h. At the same time, the pressure plate 301c drives the moving plate 301d to move upward, thereby driving the rack 301e to move upward. When the rack 301e meshes with the gear 301f, the rack 301e drives the gear 301f to rotate in the reverse direction. Through the cooperation of the ratchet 302a and the pawl 302b, the gear 301f cannot drive the rotating shaft 301b to rotate, so as to ensure that when the rack 301e moves upward, it will not cause the mainspring 301g to reverse and avoid damaging the internal structure of the mainspring 301g.

[0070] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered by the scope of the claims of the present invention.

Claims

1. A multi-axis calibration platform for an X-ray device, characterized in that: Comprising, a wheel hub (400); a clamping assembly (200), located below the wheel hub (400), including a fixture housing (201a), clamping plates (201b), threaded rods (201c), rotating blocks (201d), and support columns (201e). The fixture housing (201a) is disposed below the wheel hub (400), the clamping plates (201b) are located on both sides of the wheel hub (400), the clamping plates (201b) are provided with threaded grooves (201b-1), the threaded rods (201c) are threadedly connected to the threaded grooves (201b-1), through grooves (201a-1) are provided on the outer wall of the fixture housing (201a), one end of the threaded rod (201c) is movably connected to the inner wall of the fixture housing (201a), and the other end is inserted into the through groove (201a-1). The rotating block (201d) is fixed to one end of the threaded rod (201c), and the support column (201e) is fixed to the top of the fixture housing (201a); a rotating assembly (300), disposed within the fixture housing (201a), including rollers (301a), rotating shafts (301b), pressing plates (301c), moving plates (301d), racks (301e), gears (301f), and clockwork springs (301g). The rollers (301a) are disposed below the wheel hub (400), the rotating shafts (301b) are inserted into the rollers (301a), and one end of the rotating shaft (301b) is movably connected to the fixture housing (201a). The clamping plates (201b) are provided with rotating grooves (201b-2), and the rotating shafts (301b) are engaged with the rotating grooves (201b-2). The pressing plates (301c) are located on one side of the support columns (201e), the moving plates (301d) are fixed to the bottoms of the pressing plates (301c), the racks (301e) are fixed to one side of the moving plates (301d), the gears (301f) are sleeved on the rotating shafts (301b), and the clockwork springs (301g) are disposed outside the rotating shafts (301b).

2. The multi-axis calibration platform of the X-ray device according to claim 1, characterized in that: One side of the clamping plate (201b) is fixed with a push plate (201f), the moving plate (301d) is provided with a pushing groove (301d-1), and the push plate (201f) is engaged with the pushing groove (301d-1).

3. The multi-axis calibration platform of the X-ray device according to claim 1 or 2, characterized in that: The rotating assembly (300) further includes a transmission member (302), including a ratchet wheel (302a), a ratchet pawl (302b), and a torsion spring (302c). The ratchet wheel (302a) is fixed to the inner wall of the gear (301f), a fixing groove (301b-1) is provided in the rotating shaft (301b), the ratchet pawl (302b) is disposed in the fixing groove (301b-1), and both ends of the torsion spring (302c) are fixed to the ratchet pawl (302b) and the inner wall of the fixing groove (301b-1) respectively.

4. The multi-axis calibration platform of the X-ray device according to claim 3, characterized in that: A spring (301h) is fixed to the bottom of the pressing plate (301c), and the other end of the spring (301h) is fixed to the fixture housing (201a).

5. The multi-axis calibration platform of the X-ray device according to claim 4, characterized in that: A fixing post (301i) is provided on one side of the winding spring (301g), and the fixing post (301i) is fixed to the inner wall of the fixture housing (201a).

6. The multi-axis calibration platform of the X-ray device according to claim 4 or 5, characterized in that: A friction block (301j) is fixed to the outside of the roller (301a).

7. The multi-axis calibration platform of the X-ray device according to claim 6, characterized in that: The threads on the threaded rod (201c) are divided into two sections, and the thread directions are set in opposite directions.

8. The multi-axis calibration platform of the X-ray device according to claim 7, characterized in that: A rolling groove (201e-1) is formed in the support column (201e), a roller (201g) is arranged in the rolling groove (201e-1), and the roller (201g) is rotatably connected to the rolling groove (201e-1).

9. The multi-axis calibration platform of the X-ray device according to claim 7 or 8, characterized in that: The fixture housing (201a) is provided with a moving groove (201a-2), and the clamping plate (201b) is slidably connected to the moving groove (201a-2).

10. The multi-axis calibration platform of the X-ray device according to claim 9, characterized in that: It further includes a detection assembly (100), which is located outside the clamping assembly (200), and includes a rotating table (101), a protection chamber (102) and a transmitting device (103). The rotating table (101) is arranged below the clamping assembly (200), the protection chamber (102) is located outside the rotating table (101), and the transmitting device (103) is fixed to the inner wall of the protection chamber (102).

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