A device for detecting the flatness of a wheel hub unit and a method for detecting the flatness of a wheel hub unit

Abstract

The application discloses a kind of wheel hub unit finished product turning flat height detection device and its detection method, including frame (1), workbench (2) is equipped on frame (1), workbench (2) is equipped with lifting platform (3) and feeding rack (4);The feeding rack (4) is equipped with feeding movement mechanism (5), and the execution end of feeding movement mechanism (5) is equipped with feeding clamping mechanism (6), and the inner end of lifting platform (3) is equipped with detection table (7), and the table top of lifting platform (3) and close to detection table (7) are provided with detector (8).The application can meet the feeding detection requirements of large quantities of wheel hub workpieces by automatic feeding structure, and effectively improves the detection efficiency by using point touch type detection form under meeting the wheel hub unit assembly requirements.

Description

Technical Field

[0001] This invention relates to the field of machining production lines, and specifically to a device and method for detecting the height of the turning plane of a wheel hub unit. Background Technology

[0002] The quality of wheel hub unit assembly directly affects the safety performance of motor vehicles. To ensure the assembly accuracy of the wheel hub unit, one side is inspected before turning to detect its radial runout, which facilitates the selection of an appropriate feed rate during turning. Existing technology, such as Chinese utility model patent CN218895763U, discloses a wheel hub unit radial runout detection mechanism, including a bracket, a clamping mechanism, a pressing mechanism, a rotating mechanism, a measuring platform, and a detection mechanism. The pressing mechanism is vertically movable on the bracket, the clamping mechanism is mounted on the bracket and located below the pressing mechanism, the rotating mechanism is mounted on the pressing mechanism, the measuring platform is located above the clamping mechanism, and the detection mechanism is vertically movable on the bracket.

[0003] However, this testing agency has some shortcomings: it uses manual loading, which results in high labor intensity for staff and makes it difficult to meet the testing needs of large batches of wheel hub units; at the same time, considering the assembly requirements of wheel hub units and the machining accuracy requirements of the machined surfaces, such high testing accuracy is not required, which would increase the maintenance cost of the equipment, so it is not suitable; and its rotary testing method reduces testing efficiency to some extent. Summary of the Invention

[0004] The purpose of this invention is to provide a device and method for detecting the height of the turning surface of a wheel hub unit. This invention, through its automated feeding structure, can meet the feeding and detection requirements of large-volume wheel hub workpieces, and, while meeting the assembly requirements of the wheel hub unit, effectively improves detection efficiency by employing a point-contact detection method.

[0005] The technical solution of the present invention: A device for detecting the height of the machined surface of a finished wheel hub unit, comprising a frame, a worktable mounted on the frame, a lifting platform and a loading rack on the worktable; the device further comprises:

[0006] A feeding and moving mechanism is installed on the feeding rack. The feeding and moving mechanism is used to move the wheel hub workpiece from the feeding area to the inspection position.

[0007] A feeding clamping mechanism is provided at the execution end of the feeding moving mechanism, and the feeding clamping mechanism is used to clamp the wheel hub workpiece;

[0008] An inspection table is located at the inner end of the lifting platform. The inspection table is used to position and fix the wheel hub workpiece to be inspected.

[0009] The detector is set on the platform of the lifting platform and close to the detection platform. The detector includes a shifting assembly. The execution end of the shifting assembly is provided with a point-contact plane height detection element. The shifting assembly is used to move the point-contact plane height detection element to the detection position of the detection platform so that the detection end contacts the inner side of the wheel hub workpiece to detect the plane height.

[0010] In the above-mentioned wheel hub unit finished product turning plane height detection device, the loading and moving mechanism includes a rodless cylinder disposed on the side of the loading frame, and a T-shaped seat is provided at the moving end of the rodless cylinder; the upper surface of the loading frame is provided with first slide rails on both sides, and a first slider is provided on the first slide rails; the T-shaped seat and the first slider are jointly provided with a lifting component; the lifting end of the lifting component is provided with a transverse component; and the loading clamping mechanism is disposed at the moving end of the transverse component.

[0011] In the aforementioned wheel hub unit finished product turning plane height detection device, the lifting component includes a base plate set on the first slider, and a lifting cylinder is provided at the bottom of the base plate; multiple guide columns are provided around the lifting cylinder on the base plate, and an annular plate is provided at the end of the guide columns; a support frame is provided at the upper end of the guide columns and the extended end of the lifting cylinder; and the transverse component is set on the support frame.

[0012] In the aforementioned wheel hub unit finished product turning plane height detection device, the two ends of the loading rack are provided with side blocks, and the side blocks are provided with positioning rods and positioning sensors that contact the base plate.

[0013] In the aforementioned wheel hub unit finished product turning plane height detection device, the loading clamping mechanism includes a clamping cylinder disposed at the moving end of the transverse component, and the extended end of the clamping cylinder is provided with a clamp for clamping the wheel hub workpiece.

[0014] In the aforementioned wheel hub unit finished product turning plane height detection device, the detection table includes a positioning ring disposed at the inner end of the lifting platform, and the positioning ring is provided with an inner groove; the inner end of the lifting platform is provided with U-shaped frames for placing sensors on both sides.

[0015] In the aforementioned wheel hub unit finished product turning plane height detection device, the advance sliding component includes a translation component set on the lifting platform, a lifting component is provided on the moving end of the translation component, and the point contact plane height detection component is set on the lifting end of the lifting component.

[0016] In the aforementioned wheel hub unit finished product turning plane height detection device, the point contact plane height detection component includes a top plate disposed at the lifting end of the lifting component, a seat body disposed on the lower surface of the end of the top plate, an elastic shaft disposed at the end of the seat body, a three-pronged plate disposed at the end of the elastic shaft, and a guide shaft disposed at the end of the three-pronged plate passing through the side of the seat body; a plurality of detection heads are evenly disposed on the side of the seat body.

[0017] The specific steps of the aforementioned wheel hub unit finished product turning plane height detection device are as follows:

[0018] Step 1: The feeding moving mechanism is located at one end of the feeding rack. The feeding clamping mechanism clamps the wheel hub workpiece. The feeding clamping mechanism moves backward through the feeding moving mechanism. At the same time, the feeding clamping mechanism moves towards the inspection table until the wheel hub workpiece corresponds to the position of the inspection table. Then, the feeding moving mechanism drives the feeding clamping mechanism to move forward. At the same time, the lifting end in the feeding moving mechanism drives the wheel hub workpiece to descend until the wheel hub workpiece is placed and locked into the inspection table.

[0019] Step 2: The lower surface of the side lug of the wheel hub workpiece is used as the reference surface. After the wheel hub workpiece is placed stably, the detector starts to operate. The advance sliding component moves the point-contact plane height detection component to the top of the wheel hub workpiece. The point-contact plane height detection component then descends, and its end detection end makes point contact with the annular surface to be detected on the upper surface of the wheel hub workpiece. The height values ​​between multiple points of the annular surface to be detected and the reference surface are measured, providing data basis for the subsequent turning machining of the annular surface to be detected.

[0020] In the aforementioned method for detecting the height of the machined surface of the finished wheel hub unit, in step 2, the point-contact surface height detection component and the annular surface to be detected will generate a certain preload force to ensure that the detection end of the point-contact surface height detection component is in more stable contact with the annular surface to be detected.

[0021] Compared with the prior art, the present invention has the following advantages:

[0022] 1. In this invention, when inspecting a large batch of wheel hub workpieces, manual loading of each workpiece is unnecessary. The loading and moving mechanism drives the loading clamping mechanism to perform a series of actions such as reversing, moving towards the inspection table, moving forward, and descending, thereby smoothly placing the wheel hub workpieces and clamping them into the inspection table. This process not only greatly improves loading efficiency and meets the needs of large-scale inspection, but also avoids the high-intensity labor caused by manual loading, reduces labor costs, and reduces the errors that may occur in manual operation, ensuring the consistency and stability of loading. The point-contact detection method significantly improves inspection efficiency and accuracy. The advance sliding component in the detector drives the point-contact plane height detection component to move flexibly, enabling it to quickly move above the wheel hub workpiece and descend. The end detection end makes point contact with the annular surface to be inspected on the upper surface of the wheel hub workpiece. This point-contact detection eliminates the cumbersome traditional rotary detection method, eliminating the need to rotate the workpiece and allowing simultaneous detection of multiple points on the annular surface to be inspected. Moreover, the preload generated during point contact ensures the stability of the contact between the detection end and the surface to be detected, and can accurately measure the height values ​​between multiple points and the reference surface. This not only provides reliable data for subsequent turning processing quickly and significantly shortens the single detection time, but also avoids the problem of increased equipment maintenance costs caused by excessively high detection accuracy while meeting the assembly requirements of the wheel hub unit, thus balancing efficiency and economy.

[0023] 2. The positioning rod and positioning sensor are used to ensure the accurate positioning of the feeding moving mechanism. The positioning rods set on the side blocks at both ends of the feeding frame will contact the base plate in the lifting assembly. When the rodless cylinder drives the base plate to move along the first slide rail, the positioning rod can limit the movement of the base plate to ensure that the base plate stops accurately at a specific position. This avoids the feeding position deviation caused by the feeding moving mechanism not moving to the correct position, and ensures that the feeding clamping mechanism can accurately transfer the wheel hub workpiece to the corresponding placement position on the inspection table. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of the present invention;

[0025] Figure 2 This is a schematic diagram of the material feeding and moving mechanism;

[0026] Figure 3 This is a schematic diagram of the positioning rod;

[0027] Figure 4 This is a schematic diagram of the translation component;

[0028] Figure 5 This is a schematic diagram of the positioning ring;

[0029] Figure 6 A schematic diagram of the detector;

[0030] Figure 7This is a schematic diagram of an elastic shaft.

[0031] The markings in the attached diagram are as follows: 1-Frame, 2-Workbench, 3-Lifting platform, 4-Feeding rack, 5-Feeding moving mechanism, 6-Feeding clamping mechanism, 7-Detection table, 8-Detector, 9-Infeeding sliding assembly, 10-Point contact type plane height detection component, 11-Rodless cylinder, 12-T-shaped seat, 13-First slide rail, 14-First slider, 15-Lifting assembly, 16-Transverse assembly, 17-Base plate, 18-Lifting cylinder, 19-Guide column, 20-Annular plate, 21-Support bracket, 22-Side block, 23-Positioning rod, 24-Positioning sensor, 25-Clamping cylinder, 26-Gripper, 27-Positioning ring, 28-Inner groove, 29-U-shaped frame, 30-Translation assembly, 31-Lifting component, 32-Top plate, 33-Seat body, 34-Elastic shaft, 35-Tripod plate, 36-Guide shaft, 37-Detection head. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and embodiments, but this should not be construed as limiting the present invention.

[0033] Example: A device for detecting the height of the machined surface of a finished wheel hub unit, including a frame 1, as shown in the attached figure. Figure 1 As shown, the frame 1 is equipped with a worktable 2, and the worktable 2 is equipped with a lifting platform 3 and a loading rack 4; the hub unit needs to be assembled, and before assembly, the annular surface at one end of the hub unit needs to be machined. The device also includes:

[0034] The feeding moving mechanism 5 is mounted on the feeding rack 4, as shown in the attached figure. Figure 2 As shown, the feeding and moving mechanism 5 is used to move the wheel hub workpiece from the feeding area to the inspection position;

[0035] The feeding clamping mechanism 6 is located at the execution end of the feeding moving mechanism 5. The feeding clamping mechanism is used to feed and clamp the wheel hub workpiece.

[0036] Inspection table 7 is located at the inner end of lifting table 3. Inspection table 7 is used to position and fix the wheel hub workpiece to be inspected.

[0037] Detector 8 is mounted on the platform of lifting platform 3 and positioned close to detection platform 7, as shown in the attached diagram. Figure 6 As shown, the detector 8 includes a shifting assembly 9, the execution end of which is provided with a plane height detection element 10. The shifting assembly 9 is used to move the point-contact plane height detection element 10 to the detection position of the detection table 7, so that the detection end contacts the inner side of the wheel hub workpiece to detect the plane height; the shifting assembly 9 includes a translation assembly 30 disposed on the lifting table 3, as shown in the attached figure. Figure 4As shown, a lifting component 31 is installed on the moving end of the translation component 30. The translation component and the lifting component are mainly composed of a cylinder and a slide rail structure. The point-contact plane height detection component 10 is set on the lifting end of the lifting component 31. The advance sliding component consists of the translation component and the lifting component. The multi-dimensional movement of the point-contact plane height detection component is realized through the coordinated action of the two. The translation component can drive the detection component to move flexibly in the horizontal direction, so that it can slide accurately from the initial position to the top of the detection table, ensuring that it is aligned with the annular surface to be detected of the wheel hub workpiece in the horizontal direction. The lifting component is responsible for driving the detection component to rise and fall in the vertical direction. After the horizontal positioning is completed, it drives the detection component to fall to the detection position that contacts the surface to be detected. After the detection is completed, it is raised and reset.

[0038] The point-contact plane height detection component 10 includes a top plate 32 disposed at the lifting end of the lifting component 31, a base 33 mounted on the lower surface of the end of the top plate 32, and an elastic shaft 34 mounted on the end of the base 33, as shown in the attached figure. Figure 7 As shown, a three-pronged plate 35 is installed at the end of the elastic shaft 34, and a guide shaft 36 passing through the side of the seat 33 is installed at the end of the three-pronged plate 35. Multiple detection heads 37 are evenly arranged on the side of the seat 33. The elastic shaft mainly includes a shaft body passing through the seat body, with a spring on the shaft body. One end of the spring is connected to the three-pronged plate. As the seat body gradually descends, when the detection head contacts the upper surface of the wheel hub workpiece, the shaft body will retract, and the three-pronged plate will abut against the upper end of the wheel hub workpiece, forming a preload under the action of the spring. This ensures stable contact between the detection head and the detection surface, avoiding measurement errors or surface damage caused by rigid contact. The guide shaft mainly serves to stabilize the three-pronged plate. Three detection heads are arranged on the side of the seat body, with adjacent detection heads at 120-degree intervals, allowing simultaneous detection of different points on the annular surface to be detected. The ends of the detection heads are spherical structures. This distributed design provides more comprehensive inspection data, reflecting the height variation of the entire annular surface. Through multi-point height data acquisition, the inspection component can accurately obtain the height difference distribution of the annular surface to be inspected relative to the reference surface (lower surface of the side lug). This data is directly used for calculating the feed rate in subsequent turning operations, ensuring that the height of the machined plane meets the assembly accuracy requirements.

[0039] The loading and moving mechanism 5 includes a rodless cylinder 11 disposed on the side of the loading rack 4, with a T-shaped seat 12 at the moving end of the rodless cylinder 11; first slide rails 13 are installed on both sides of the upper surface of the loading rack 4, and first sliders 14 are fitted on the first slide rails 13; a lifting assembly 15 is jointly installed on the T-shaped seat 12 and the first sliders 14; a transverse moving assembly 16 is installed on the lifting end of the lifting assembly 15; a loading clamping mechanism 6 is disposed at the moving end of the transverse moving assembly 16; when the rodless cylinder is activated, the wheel hub workpiece is moved laterally through the slide rail and slider structure, mainly to move the wheel hub unit from the transmission mechanism to the inspection table; the lifting assembly 15... The system includes a base plate 17 mounted on the first slider 14, with a lifting cylinder 18 installed at the bottom of the base plate 17. Multiple guide columns 19 are mounted around the lifting cylinder 18 on the base plate 17, and an annular plate 20 is installed at the end of each guide column 19. There are four guide columns in total, and the annular plate is fixed to these four guide columns. A support frame 21 is mounted on the upper end of the guide columns 19 and the extended end of the lifting cylinder 18. A transverse moving assembly 16 is mounted on the support frame 21. When the lifting cylinder is activated, it drives the transverse moving assembly and the loading clamping mechanism connected to the transverse moving assembly to move up and down, thereby moving the wheel hub unit up and down and placing the wheel hub unit on the inspection table.

[0040] The feeding rack 4 has side blocks 22 at both ends. The side blocks 22 are equipped with positioning rods 23 and positioning sensors 24 that contact the base plate 17, as shown in the attached figure. Figure 3 As shown, the positioning rods ensure the precise positioning of the loading and moving mechanism. The positioning rods on the side blocks at both ends of the loading rack contact the base plate in the lifting assembly. When the rodless cylinder moves the base plate along the first slide rail, the positioning rods limit the travel of the base plate, ensuring it stops precisely at a specific position. This prevents loading position deviations caused by the loading and moving mechanism not moving to the correct position, ensuring the loading clamping mechanism accurately transfers the wheel hub workpiece to the corresponding placement position on the inspection table. The positioning sensor provides a precise trigger signal for the inspection process, ensuring that subsequent actions can only continue after the base plate has moved to the set position.

[0041] The feeding and clamping mechanism 6 includes a clamping cylinder 25 disposed at the moving end of the transverse component 16. The extended end of the clamping cylinder 25 is equipped with a jaw 26 for clamping the wheel hub workpiece. The inner side of the jaw has an arc-shaped structure that fits against the maximum diameter end of the wheel hub unit to ensure the stability of the clamping.

[0042] The testing platform 7 includes a positioning ring 27 disposed at the inner end of the lifting platform 3, as shown in the attached figure. Figure 5As shown, the positioning ring 27 has an inner groove 28; the end of the hub unit is inserted into the inner groove, and the lower surface of multiple side ears on the side of the hub unit serves as a reference surface, which contacts the port ring surface of the positioning ring. U-shaped brackets 29 for placing sensors are installed on both sides of the inner end of the lifting platform 3. These U-shaped brackets are mainly used to install the sensors, which are infrared sensors, primarily detecting whether the hub workpiece is placed stably in the positioning ring. If the workpiece is not correctly placed, the sensor will send a signal, and the device can promptly pause the detection process to avoid errors in detection data or equipment malfunctions caused by improper workpiece placement. Its function is to provide a precise trigger signal for the detection process, ensuring that the detector only starts subsequent plane height detection work after the workpiece is correctly positioned, thus improving the automation and reliability of the detection.

[0043] The detection method of the wheel hub unit finished turning plane height detection device includes the following specific steps:

[0044] Step 1: The rodless cylinder of the feeding and moving mechanism is positioned at the end of the feeding rack near the feeding area. The lateral movement component drives the feeding clamping mechanism to align with the wheel hub workpiece in the feeding area. At this time, the lifting cylinder of the lifting component is in a retracted state, and the gripper is positioned at a suitable height above the workpiece. The clamping cylinder actuates, driving the gripper to close, and the inner arc surface of the gripper fits against the outer circle of the wheel hub workpiece, stably clamping the workpiece. The rodless cylinder drives the T-shaped seat and the connected base plate to move backward along the first slide rail (away from the feeding area). At the same time, the lateral movement component actuates, adjusting the lateral position of the workpiece so that the center of the workpiece is aligned with the center of the positioning ring of the inspection table. The rodless cylinder actuates again, driving the workpiece to move towards the inspection table until the top of the workpiece is aligned with the positioning ring.

[0045] Step 2: The lifting cylinder of the lifting assembly extends, driving the support frame and workpiece to descend. The guide column slides along the annular plate to ensure a smooth descent. This continues until the bottom of the wheel hub workpiece is engaged in the inner groove of the positioning ring, and the lower surface of the workpiece's side ear is in contact with the port surface of the positioning ring (forming a reference surface). Sensors (such as infrared sensors) on the U-shaped frames on both sides of the inner end of the lifting platform detect whether the workpiece is placed stably (without tilting or offset). If tilting or incomplete engagement of the workpiece is detected, the sensor sends a signal, the device pauses and alarms, and manual adjustment is required before repositioning. If the workpiece is placed stably, the sensor sends a pass signal, the clamping cylinder resets, the grippers release the workpiece, and the loading clamping mechanism rises under the action of the lifting assembly (the lifting cylinder retracts) to avoid interfering with subsequent detection. The advance sliding assembly of the detector is activated, and the translation assembly (the cylinder drives the slider to move along the slide rail) moves the point-contact plane height detection component horizontally until the three detection heads are aligned with the three points on the annular surface to be detected on the upper surface of the wheel hub workpiece. The lifting... When the component moves, the top plate and the connected seat body descend. The three-pronged plate abuts against the upper end of the hub workpiece, and the elastic shaft is compressed and contracted, generating a preload. At this time, the guide shaft slides along the side of the seat body to ensure that the detection component descends vertically without deviation. Under the action of the preload, the three detection heads make stable contact with the surface to be detected. The detection heads collect the height data of the contact points in real time. The data of the three points are transmitted to the control system. The system records and calculates the average value and the maximum deviation value. The three detection heads are distributed at 120 degrees, which can cover the circumferential range of the annular surface to be detected. By using the data of the three points, it is possible to quickly determine whether there is an overall tilt or local bulge or depression on the annular surface, providing a comprehensive basis for adjusting the feed rate in subsequent turning machining.

Claims

1. A device for detecting the height of the machined surface of a finished wheel hub unit, comprising a frame (1), a worktable (2) on the frame (1), a lifting platform (3) and a loading rack (4) on the worktable (2); characterized in that: The device also includes: The feeding moving mechanism (5) is set on the feeding rack (4). The feeding moving mechanism (5) is used to move the wheel hub workpiece from the feeding area to the detection position. The feeding clamping mechanism (6) is located at the execution end of the feeding moving mechanism (5), and the feeding clamping mechanism (6) is used to clamp the wheel hub workpiece; The inspection table (7) is located at the inner end of the lifting table (3). The inspection table (7) is used to position and fix the wheel hub workpiece to be inspected. The detector (8) is set on the platform of the lifting platform (3) and close to the detection platform (7). The detector (8) includes a shift sliding assembly (9). The execution end of the shift sliding assembly (9) is provided with a point-contact plane height detection element (10). The shift sliding assembly (9) is used to move the point-contact plane height detection element (10) to the detection position of the detection platform (7) so that the detection end contacts the inner side of the wheel hub workpiece to detect the plane height. The advance sliding assembly (9) includes a translation assembly (30) disposed on the lifting platform (3), and a lifting component (31) is provided on the moving end of the translation assembly (30). The point-contact plane height detection component (10) is disposed on the lifting end of the lifting component (31). The point-contact plane height detection component (10) includes a top plate (32) disposed at the lifting end of the lifting component (31). The lower surface of the end of the top plate (32) is provided with a seat (33). The end of the seat (33) is provided with an elastic shaft (34). The end of the elastic shaft (34) is provided with a three-pronged plate (35). The end of the three-pronged plate (35) is provided with a guide shaft (36) that passes through the side of the seat (33). The side of the seat (33) is uniformly provided with a plurality of detection heads (37).

2. The wheel hub unit finished product turning plane height detection device according to claim 1, characterized in that: The feeding moving mechanism (5) includes a rodless cylinder (11) disposed on the side of the feeding rack (4), and a T-shaped seat (12) is provided at the moving end of the rodless cylinder (11); the upper surface of the feeding rack (4) is provided with a first slide rail (13) on both sides, and a first slider (14) is provided on the first slide rail (13); the T-shaped seat (12) and the first slider (14) are provided with a lifting component (15); the lifting end of the lifting component (15) is provided with a transverse component (16); and the feeding clamping mechanism (6) is disposed at the moving end of the transverse component (16).

3. The wheel hub unit finished product turning plane height detection device according to claim 2, characterized in that: The lifting assembly (15) includes a base plate (17) disposed on the first slider (14), and a lifting cylinder (18) is provided at the bottom of the base plate (17); a plurality of guide columns (19) are provided around the lifting cylinder (18) on the base plate (17), and an annular plate (20) is provided at the end of the guide column (19); a support frame (21) is provided at the upper end of the guide column (19) and the extended end of the lifting cylinder (18); and the transverse component (16) is disposed on the support frame (21).

4. The wheel hub unit finished product turning plane height detection device according to claim 3, characterized in that: The feeding rack (4) has side blocks (22) at both ends. The side blocks (22) are equipped with positioning rods (23) and positioning sensors (24) that are in contact with the base plate (17).

5. The wheel hub unit finished product turning plane height detection device according to claim 2, characterized in that: The feeding clamping mechanism (6) includes a clamping cylinder (25) disposed at the moving end of the transverse component (16), and the extended end of the clamping cylinder (25) is provided with a clamping claw (26) for clamping the wheel hub workpiece.

6. The wheel hub unit finished product turning plane height detection device according to claim 1, characterized in that: The detection platform (7) includes a positioning ring (27) located at the inner end of the lifting platform (3), and the positioning ring (27) has an inner groove (28); the inner ends of the lifting platform (3) are provided with U-shaped frames (29) for placing sensors.

7. The detection method of the wheel hub unit finished product turning plane height detection device according to any one of claims 1 to 6, characterized in that: The specific steps are as follows: Step 1: The loading and clamping mechanism clamps the wheel hub workpiece and moves backward through the loading and moving mechanism. At the same time, the loading and clamping mechanism moves toward the inspection table until the wheel hub workpiece is in the position corresponding to the inspection table. Then, the loading and moving mechanism drives the loading and clamping mechanism to move forward, and at the same time, the lifting end in the loading and moving mechanism drives the wheel hub workpiece to descend until the wheel hub workpiece is placed and locked into the inspection table. Step 2: Using the lower surface of the side lug of the wheel hub workpiece as the reference surface, after the wheel hub workpiece is securely placed, the detector starts to operate. The advance sliding component moves the point-contact plane height detection component to the top of the wheel hub workpiece. The point-contact plane height detection component then descends, and its end detection end makes contact with the annular surface to be detected on the upper surface of the wheel hub workpiece. The height values ​​between multiple points of the annular surface to be detected and the reference surface are measured, providing data for the subsequent turning of the annular surface to be detected.

8. The detection method according to claim 7, characterized in that: In step 2, the point-contact plane height detection component generates a certain preload on the annular surface to be tested, ensuring that the detection end of the point-contact plane height detection component is in more stable contact with the annular surface to be tested.

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