Engine attitude detection and adjustment device

Abstract

The invention discloses an engine attitude detection and adjustment device, which comprises a carrying and moving workbench, and one end of the carrying and moving workbench is vertically and fixedly connected with a bearing plate; the two sets of sliding base plates are connected to the table top of the carrying and moving workbench in a sliding mode. The two groups of engine attitude adjusting mechanisms are correspondingly connected to the two groups of sliding seat plates respectively, and an engine to be tested is supported on the engine attitude adjusting mechanisms; the anti-galloping assembly is fixed to the sliding seat plate and limits jumping of an engine. The detection assembly is fixed to the end, close to the bearing plate, of the engine. The engine attitude detection module is fixed on the detection assembly, the engine attitude detection module obtains the axial offset data of the engine based on the background reference of the bearing plate, and the device is simple in structure, convenient to use, low in manual labor intensity and high in practicability.

Description

Technical Field

[0001] The present invention belongs to the technical field of attitude detection and adjustment, and particularly relates to an automatic attitude detection and adjustment device applied to the engine test process. Background Art

[0002] In modern manufacturing, automated production lines highly rely on precise equipment attitude control. The attitude detection and adjustment level of an industry determines its product technical level and quality control ability, which requires qualified tooling and measuring instruments to accurately measure the tested products.

[0003] Currently, the method for detecting and adjusting the engine attitude used in the industry is manual adjustment. The gap between the tested object and the reference plane is measured by using a feeler gauge, and then the pitch angle and horizontal angle of the engine are manually adjusted to confirm whether the engine axis is perpendicular to the test bearing plate. This will inevitably lead to risks of misreading and misrecording, and cannot form a digital output mode, affecting the work efficiency and accuracy. Moreover, there are many test toolings, which are inconvenient to manage, and the labor intensity of workers is high.

[0004] Currently, there are many types of engines with different lengths and diameters, and there is also the situation where the front and rear diameters of the same engine are inconsistent. Moreover, the outer surface of the engine cannot be used as a reference, resulting in no regular pattern in the attitude adjustment process. It is necessary to repeatedly adjust to achieve the purpose of making the engine axis perpendicular to the test bearing plate.

[0005] In view of the above problems, there is a great demand for automating the attitude detection and adjustment method during the engine test process.

[0006] Therefore, how to provide an engine attitude detection and adjustment device is an urgent problem for those skilled in the art to solve. Summary of the Invention

[0007] In view of this, the present invention provides an engine attitude detection and adjustment device with strong adjustment ability and high versatility. It can detect whether the axis of the engine is perpendicular to the bearing plate. If not, it can adjust the attitude of the engine to ensure the true detection of the engine test data during the subsequent test process.

[0008] To achieve the above object, the present invention adopts the following technical solution: An engine attitude detection and adjustment device, which includes:

[0009] A carrier workbench, one end of the carrier workbench is vertically and fixedly connected with a bearing plate;

[0010] Sliding seat plates, there are two groups of sliding seat plates and they are respectively slidably connected to the tabletop of the carrier workbench;

[0011] Engine attitude adjustment mechanism, there are two sets of the engine attitude adjustment mechanism and are respectively connected to the two sets of the sliding seat plates correspondingly, and an engine to be tested is supported on the engine attitude adjustment mechanism;

[0012] Anti-runaway component, the anti-runaway component is fixed on the sliding seat plate and is located above the engine, and the anti-runaway component restricts the jumping of the engine;

[0013] Detection component, the detection component is fixed at the end of the engine close to the bearing plate;

[0014] Engine attitude detection module, the engine attitude detection module is fixed on the detection component, and the engine attitude detection module obtains the axial offset data of the engine based on the background reference of the bearing plate.

[0015] The beneficial effects of the present invention are as follows: The sliding seat plate provides a sliding basis for the engine attitude adjustment mechanism. The two sets of sliding seat plates cooperate with the engine attitude adjustment mechanism thereon to complete the axial limit of the engine. It should be noted that the engine attitude adjustment mechanism of the present invention can support the engine and complete the adjustment of the engine position, and the purpose is to ensure the perpendicularity between the engine axis and the bearing plate during the test. The provided anti-runaway component is a safety component, which can avoid the engine jumping upward caused by the perpendicularity deviation between the engine and the bearing plate during the test and ensure the safety of the test process. It can be understood that the present invention adjusts the axial position of the engine by using the engine attitude adjustment mechanism to adjust the perpendicularity between the engine axis and the bearing plate. The engine attitude adjustment mechanism only supports the engine component and does not affect the trend of the engine axis during the subsequent test process, so as to realize the detection of the test data of the engine by the detection component.

[0016] Preferably, a computer component is fixed on one side of the load transfer workbench. The computer component is respectively electrically connected to the detection component and the engine attitude detection module. The computer component is internally provided with a simulation system, and the computer component provides adjustment data of the engine attitude adjustment mechanism through the simulation system.

[0017] The resulting technical effects are as follows: The initial data can be loaded through the simulation system, and the adjustment amount required for the engine attitude displacement can be prompted, so as to realize the perpendicularity adjustment between the engine axis and the bearing plate. The engine attitude detection module can detect the perpendicularity between the engine axis and the bearing plate.

[0018] Preferably, two guide rails are arranged in parallel on the table top of the loading and moving workbench, the sliding seat plate is slidably connected to the guide rails and moves toward the pressure plate, a rack is fixed on one side of the loading and moving workbench parallel to the guide rail, and a gear drive mechanism is installed on the end side of the sliding seat plate, the gear drive mechanism is connected to the rack for transmission and changes the moving position of the sliding seat plate on the guide rail.

[0019] The technical effect produced thereby is that the sliding seat plate can slide smoothly on the loading and shifting workbench, and the distance between the two sliding seat plates can be adjusted according to the different axial dimensions of the engine.

[0020] Preferably, the engine attitude adjustment mechanism includes a roller frame and a roller frame adjustment assembly that are close to or far away from each other, the roller frame is slidably connected to the sliding seat plate, and both of the roller frames are connected with rollers that are tilted and rotatable. The two rollers are used to support the engine, and the rollers on the two roller frames are arranged in a V shape.

[0021] The resulting technical effect is that roller frames that are close to or far away from each other can adapt to engines of different diameters, and the engine posture can also be adjusted by adjusting the distance between the two roller frames. The linkage changes are the left-right and up-down positions of the engine.

[0022] Preferably, the roller frame adjustment assembly includes a slide rail and an adjusting screw, the slide rail is fixed on the sliding seat plate, the roller frame is slidably connected to the slide rail, the moving direction of the roller frame is perpendicular to the moving direction of the sliding seat plate, the adjusting screw is rotatably connected to the slide rail and the rotation of the adjusting screw causes the roller frame to move on the slide rail.

[0023] The resulting technical effect is that the lateral position of the roller frame is adjusted by the roller frame adjustment assembly. During specific use, the roller frame adjustment assembly on one side or the roller frame adjustment assembly on both sides can be adjusted as required, thereby flexibly changing the position and posture of the engine. During specific implementation, there are high-precision scales on the slide rails to facilitate the adjustment of the roller frame.

[0024] Preferably, the anti-flying vehicle assembly includes an arc-shaped bracket and a telescopic member, the arc-shaped bracket spans above the engine and has its two ends fixedly connected to the sliding seat plate, the telescopic member is vertically connected to the top of the arc of the arc-shaped bracket, and there is a gap between the telescopic end of the telescopic member and the outer wall of the engine.

[0025] The resulting technical effects are as follows: The arc-shaped bracket is actually the installation base of the telescopic part. During specific use, different-sized arc-shaped brackets can be replaced according to the specific outer diameter of the engine to meet the installation requirements of engines of different specifications. There is a gap between the telescopic end of the telescopic part and the outer wall of the engine. On the one hand, it can reserve the amount of thermal expansion of the engine. On the other hand, it can prevent the engine from jumping up due to the perpendicularity error between the engine axis and the bearing plate, ensuring the safety of the test.

[0026] Preferably, a roller is rotatably connected to the telescopic end of the telescopic part, and there is a gap distance of 3 mm to 9 mm between the roller and the outer wall of the engine.

[0027] The resulting technical effects are as follows: The idler rollers on the roller frame can reduce the influence of components on the engine test. Although the rollers can limit the jumping of the engine, due to the small friction between the rollers and the engine housing, the influence of external components on the engine test can be minimized as much as possible.

[0028] Preferably, the detection assembly includes a connection seat and a test sensor. The connection seat is fixed to the end of the engine, the test sensor is fixed on the connection seat and abuts against the bearing plate, and the engine attitude detection module is fixed on the connection seat.

[0029] The resulting technical effects are as follows: The test sensor is located at the end of the engine. During the test detection, the test sensor abuts against the bearing plate to obtain the engine test data.

[0030] Preferably, the engine attitude detection module includes an arc-shaped rail frame and a laser distance sensor. The arc-shaped rail frame is fixed on the connection seat, the central axis of the arc-shaped rail frame corresponds coaxially to the central axis of the engine, the laser distance sensor is slidably connected to the arc-shaped rail frame, and the laser distance sensor moves on the arc-shaped rail frame and measures its distance to the bearing plate at multiple points in the circumferential direction.

[0031] The resulting technical effects are as follows: The arc-shaped rail frame provides a standard reference plane, that is, the central axis of the arc-shaped rail frame can be considered as the central axis of the engine. The purpose is to synchronously obtain the axial data of the engine. By multi-point detection of the laser distance sensor in the circumferential direction, it can be determined whether there is a deviation in the axial direction of the engine. It can be understood that when the data of multi-point detection are consistent, it indicates that the axis of the engine is perpendicular to the bearing plate and there is no deviation. If there are differences in the detected data, the engine attitude adjustment mechanism needs to be used to adjust the engine attitude to ensure the perpendicularity between the axis of the engine and the bearing plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 is an axonometric view of an engine attitude detection and adjustment device according to the present invention;

[0033] Figure 2 Side view of a device for detecting and adjusting the attitude of an engine according to the present invention;

[0034] Figure 3 Front view of a device for detecting and adjusting the attitude of an engine according to the present invention;

[0035] Figure 4 Installation schematic of the detection component of a device for detecting and adjusting the attitude of an engine according to the present invention;

[0036] Figure 5 Side view of a device for detecting and adjusting the attitude of an engine according to the present invention.

[0037] 1 Carrier transfer workbench, 11 Guide rail, 12 Rack, 2 Bearing plate, 3 Sliding seat plate, 31 Gear drive mechanism, 4 Engine attitude adjustment mechanism, 41 Roller frame, 42 Roller frame adjustment assembly, 421 Slide rail, 422 Adjusting screw rod, 43 Support roller, 5 Engine, 6 Anti-runaway component, 61 Arc bracket, 62 Telescopic member, 63 Roller, 7 Detection component, 71 Connecting seat, 72 Test sensor, 8 Engine attitude detection module, 81 Arc rail frame, 82 Laser distance sensor, 9 Computer component. Specific embodiments

[0038] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of the present invention.

[0039] Refer to the appendix of the present invention Figures 1 to 5 According to an embodiment of the present invention, a device for detecting and adjusting the attitude of an engine includes:

[0040] A carrier transfer workbench 1, and a bearing plate 2 is vertically and fixedly connected to one end of the carrier transfer workbench 1. To improve the bearing capacity of the bearing plate 2, bearing columns can be fixed on the back side of the bearing plate;

[0041] A sliding seat plate 3, and there are two groups of sliding seat plates 3 which are respectively slidably connected to the table top of the carrier transfer workbench 1;

[0042] An engine attitude adjustment mechanism 4, and there are two groups of engine attitude adjustment mechanisms 4 which are respectively connected to the two groups of sliding seat plates 3 correspondingly, that is, there is a group of engine attitude adjustment mechanism 4 on each sliding seat plate 3. The engine attitude adjustment mechanism can change the attitude and position of the engine. The engine attitude adjustment mechanism 4 supports the engine 5 to be tested, and it is generally cylindrical;

[0043] The anti-runaway component 6 is fixed on the sliding seat plate 3 and located above the engine 5, which can prevent the engine from jumping upward during the engine test, thereby ensuring the safety of the engine test;

[0044] The detection component 7 is fixed at the end of the engine 5 close to the bearing plate 2;

[0045] The engine attitude detection module 8 is fixed on the detection component 7. The engine attitude detection module 8 obtains the axial offset data of the engine 5 based on the background reference of the bearing plate 2. In turn, the engine attitude adjustment mechanism 4 is adjusted to finally achieve the perpendicularity between the engine axis and the bearing plate.

[0046] In some other embodiments, a computer component 9 is fixed on one side of the load-carrying workbench 1. The computer component 9 is electrically connected to the detection component 7 and the engine attitude detection module 8 respectively. In a specific embodiment, the computer component is electrically connected to a test sensor 72 (for measuring force) and a laser distance sensor 82;

[0047] The computer component 9 has a built-in simulation system. The computer component 9 provides adjustment data for the engine attitude adjustment mechanism 4 through the simulation system. It should be noted that the initial determination of the engine is based on empirical values. The engine is initially installed according to the empirical values, and then the engine attitude detection module 8 is used to detect the axial deviation of the engine. This deviation refers to the perpendicularity deviation between the engine axis and the bearing plate. The deviation data of the engine axis can be obtained by measuring the distances from the laser distance sensor to the bearing plate at multiple points in the circumferential direction. According to the deviation data, the engine attitude adjustment mechanism 4 is adjusted again to finally achieve the perpendicularity adjustment between the engine axis and the bearing plate 2.

[0048] In some other specific embodiments, two guide rails 11 are arranged in parallel on the tabletop of the load-carrying workbench 1. The sliding seat plate 3 is slidably connected to the guide rails 11 and moves towards the bearing plate 2. A rack 12 is fixed on one side of the load-carrying workbench 1 parallel to the guide rails 11. A gear drive mechanism 31 is installed on the end side of the sliding seat plate 3. The gear drive mechanism 31 is in transmission connection with the rack 12 and changes the moving position of the sliding seat plate 3 on the guide rails 11. It can be understood that the distance adjustment between the two sliding seat plates can adapt to engine tests with different axial specifications to improve the applicability of the equipment. For engines with different outer diameters, the engine attitude adjustment mechanism 4 is moved to the corresponding position on the load-carrying workbench 1 according to the prompts of the simulation system through the gear-rack transmission method.

[0049] In some other embodiments, the engine attitude adjustment mechanism 4 includes a roller frame 41 and two sets of roller frame adjustment components 42 that move closer to or away from each other. The roller frame 41 is slidably connected to the sliding seat plate 3. Tension rollers 43 are rotatably connected to the two roller frames 41 in an inclined manner. An engine 5 is supported between the two tension rollers. The tension rollers 43 on the two roller frames 41 are arranged in a V shape. It should be noted that the two roller frame adjustment components 42 do not interfere with each other, that is, the two roller frames 41 can be adjusted independently.

[0050] In some other specific embodiments, the roller frame adjustment component 42 includes a slide rail 421 and an adjustment screw rod 422. The slide rail 421 is fixed to the sliding seat plate 3. The roller frame 41 is slidably connected to the slide rail 421. The moving direction of the roller frame 41 is perpendicular to the moving direction of the sliding seat plate 3. The adjustment screw rod 422 is rotatably connected to the slide rail 421, and the rotation of the adjustment screw rod causes the roller frame 41 to move on the slide rail 421.

[0051] In some other embodiments, the anti-runaway component 6 includes an arc-shaped bracket 61 and a telescopic member 62. The arc-shaped bracket 61 spans above the engine 5, and its two ends are fixedly connected to the sliding seat plate 3. The telescopic member 62 is vertically connected to the apex of the arc-shaped bracket 61. There is a gap between the telescopic end of the telescopic member 62 and the outer wall of the engine 5. This is to reserve the amount of thermal expansion of the engine and also minimize the influence of the friction between the telescopic end and the outer wall of the engine on the loss of test data.

[0052] The arc-shaped bracket 61 is divided into two types: a large-sized bracket and a small-sized bracket. For engines with different outer diameters, the small-sized bracket is suitable for engines with a small diameter, and the large-sized bracket is suitable for engines with a large diameter.

[0053] During specific use, the telescopic member can be an electric telescopic cylinder or a manual screw regulator.

[0054] In some other specific embodiments, a roller 63 is rotatably connected to the telescopic end of the telescopic member 62. There is a gap distance of 3 mm to 9 mm between the roller 63 and the outer wall of the engine 5.

[0055] When this product is used, it can be manually adjusted according to the prompts of the simulation system or automatically adjusted. During automatic adjustment, the adjustment screw rod 422 and the gear drive mechanism 31 are both driven by servo motors. The system can complete the adjustment of relevant components by jointly controlling the working states of the servo motors of the corresponding components.

[0056] In some other embodiments, the detection component 7 includes a connection seat 71 and a test sensor 72 (for measuring force). The connection seat 71 is fixed to the end of the engine 5. The test sensor 72 is fixed to the connection seat 71 and abuts against the bearing plate 2. The engine attitude detection module 8 is fixed to the connection seat 71.

[0057] Specifically, the engine attitude detection module 8 includes an arc-shaped rail frame 81 and a laser distance sensor 82. The arc-shaped rail frame 81 is fixed on the connection seat 71, and the central axis of the arc-shaped rail frame 81 corresponds coaxially to the central axis of the engine 5. The laser distance sensor 82 is slidably connected to the arc-shaped rail frame 81. It should be noted that the laser distance sensor is slidably connected to the arc-shaped rail frame 81 with frictional resistance. The position of the laser distance sensor 82 on the arc-shaped rail frame 81 can be fixed, and the laser distance sensor 82 moves on the arc-shaped rail frame and measures its distance to the bearing plate 2 at multiple points in the circumferential direction.

[0058] During specific measurement, data at three points in the circumferential direction are measured at intervals of 120°.

[0059] Specific usage process:

[0060] For engines with different outer diameters, first slide the sliding seat plate 2 and the engine attitude adjustment mechanism 4 to the corresponding positions on the load-carrying workbench 1, which can correspond to the support positions in the axial direction of the engine. Then, according to experience, adjust the positions of the two roller frames 41 through the two groups of roller frame adjustment components 42, and install the detection component 7 and the engine attitude detection module 8 corresponding to the tail end of the engine, which is close to the bearing plate 2. Lift the engine onto the engine attitude adjustment mechanism, and then complete the installation of the anti-runaway component 6. After the initial installation of the engine, it is necessary to ensure that the test sensor 72 is in close contact with the bearing plate 2. Then, read the distances between the laser distance sensor and the bearing plate 2 at different circumferential positions through the laser distance sensor 82 to judge the perpendicularity between the axial direction of the engine and the bearing plate. Through the calculation of the simulation system, the adjustment data of the engine in the left-right direction and the up-down direction are obtained. It should be noted that the left-right direction is the x-axis direction, the up-down direction is the z-axis direction, and the axial direction is the y-axis direction.

[0061] After the operator adjusts the roller frame adjustment component 42 and the anti-runaway component 6, they leave the site, and then the engine test is carried out.

[0062] The present invention solves the problem of heavy operations brought by manual detection and adjustment. By reading the high-precision laser distance sensor, it solves the subjective errors that may occur in manual detection (a single laser distance sensor rotates one week, and judges the engine attitude according to the distances measured at different positions from the bearing plate). The adjustable engine attitude adjustment mechanism 4 can be applied to most engines with different outer diameters, reducing the workload of tooling replacement and greatly improving the work efficiency.

[0063] The present invention realizes visual data adjustment in function, outputs the digital results of the detection process, and is more convenient and effective. The design and application of this system will integrate and diversify the working methods in the field of engine (the specific application is not limited to engines) attitude detection and adjustment.

[0064] For the devices and usage methods disclosed in the embodiments, since they correspond to the methods disclosed in the embodiments, the description is relatively simple. For related parts, reference may be made to the description in the method section.

[0065] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be obvious to those skilled in the art. The general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to these embodiments shown herein, but rather will be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An engine attitude detection and adjustment device, characterized in that, Comprising: A load transfer workbench (1), with a bearing plate (2) vertically and fixedly connected to one end of the load transfer workbench (1); Sliding seat plates (3), there are two groups of the sliding seat plates (3) which are respectively slidably connected to the tabletop of the load transfer workbench (1); Engine attitude adjustment mechanisms (4), there are two groups of the engine attitude adjustment mechanisms (4) which are respectively correspondingly connected to the two groups of sliding seat plates (3), and an engine (5) to be tested is supported on the engine attitude adjustment mechanisms (4); Anti-runaway components (6), the anti-runaway components (6) are fixed on the sliding seat plates (3) and located above the engine (5), and the anti-runaway components (6) limit the jumping of the engine (5); Detection components (7), the detection components (7) are fixed at the end of the engine (5) close to the bearing plate (2); Engine attitude detection module (8), the engine attitude detection module (8) is fixed on the detection components (7), and the engine attitude detection module (8) obtains the axial offset data of the engine (5) based on the background reference of the bearing plate (2).

2. The engine attitude detection and adjustment device according to claim 1, characterized in that A computer component (9) is fixed on one side of the load transfer workbench (1), the computer component (9) is respectively electrically connected to the detection components (7) and the engine attitude detection module (8), the computer component (9) has a built-in simulation system, and the computer component (9) provides adjustment data of the engine attitude adjustment mechanisms (4) through the simulation system.

3. The engine attitude detection and adjustment device according to claim 1, characterized in that Two guide rails (11) are arranged in parallel on the tabletop of the load transfer workbench (1), the sliding seat plates (3) are slidably connected to the guide rails (11) and move towards the bearing plate (2), a rack (12) is fixed on one side of the load transfer workbench (1) parallel to the guide rails (11), a gear drive mechanism (31) is installed on the end side of the sliding seat plates (3), and the gear drive mechanism (31) is in transmission connection with the rack (12) and changes the moving position of the sliding seat plates (3) on the guide rails (11).

4. An engine attitude detection and adjustment device according to claim 1, characterized in that, The engine attitude adjustment mechanism (4) includes a roller frame (41) and a roller frame adjustment component (42) that approach or move away from each other, the roller frame (41) is slidably connected to the sliding seat plate (3), a supporting roller (43) is inclined and rotatably connected to each of the two roller frames (41), the space between the two supporting rollers is used to support the engine (5), and the supporting rollers (43) on the two roller frames (41) are arranged in a V-shaped layout.

5. An engine attitude detection and adjustment device according to claim 4, characterized in that, The roller frame adjustment component (42) includes a slide rail (421) and an adjustment screw rod (422), the slide rail (421) is fixed on the sliding seat plate (3), the roller frame (41) is slidably connected to the slide rail (421), the moving direction of the roller frame (41) is perpendicular to the moving direction of the sliding seat plate (3), the adjustment screw rod (422) is rotatably connected to the slide rail (421) and the rotation of the adjustment screw rod causes the roller frame (41) to move on the slide rail (421).

6. The engine attitude detection and adjustment device according to claim 1, characterized in that The anti-runaway component (6) includes an arc-shaped bracket (61) and a telescopic member (62). The arc-shaped bracket (61) spans above the engine (5), and its two ends are fixedly connected to the sliding seat plate (3). The telescopic member (62) is vertically connected to the apex of the arc-shaped bracket (61), and there is a gap between the telescopic end of the telescopic member (62) and the outer wall of the engine (5).

7. An engine attitude detection and adjustment device according to claim 6, characterized in that, A roller (63) is rotatably connected to the telescopic end of the telescopic member (62), and there is a clearance distance between the roller (63) and the outer wall of the engine (5).

8. An engine attitude detection and adjustment device according to claim 1, characterized in that, The detection component (7) includes a connection seat (71) and a test sensor (72). The connection seat (71) is fixed to the end of the engine (5), the test sensor (72) is fixed on the connection seat (71) and abuts against the bearing plate (2), and the engine attitude detection module (8) is fixed on the connection seat (71).

9. The engine attitude detection and adjustment device according to claim 8, characterized in that, The engine attitude detection module (8) includes an arc-shaped rail frame (81) and a laser distance sensor (82). The arc-shaped rail frame (81) is fixed on the connection seat (71), the central axis of the arc-shaped rail frame (81) corresponds coaxially to the central axis of the engine (5), the laser distance sensor (82) is slidably connected to the arc-shaped rail frame (81), and the laser distance sensor (82) moves on the arc-shaped rail frame and measures the distance to the bearing plate (2) at multiple points in the circumferential direction.

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