Assembly inspection method and assembly inspection device

Abstract

The present disclosure relates to an assembly detection method and an assembly detection device. The assembly detection method is used to detect whether a drive shaft and a hub bearing are assembled in place, the drive shaft and the hub bearing are connected in an axial direction, and a knuckle is sleeved on the drive shaft and the hub bearing. The assembly detection method comprises determining a first measurement position on the knuckle; selecting a second measurement position on the drive shaft; measuring the distance between the first measurement position and the second measurement position; setting a preset range; if the distance is within the preset range, it is determined that the drive shaft and the hub bearing are assembled in place; if the distance exceeds the preset range, it is determined that the drive shaft and the hub bearing are not assembled in place. In this way, whether the drive shaft and the hub bearing are assembled in place can be detected.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle assembly, and more particularly to an assembly inspection method and assembly inspection device. Background Technology

[0002] During the assembly of existing automotive drive shafts, the view is obstructed by the wheel hub bearing seals, making it impossible to accurately determine whether the drive shaft and wheel hub bearings are properly assembled. Improper drive shaft assembly will result in misalignment of the end face teeth connecting to the drive shaft, causing the gear clearance between the driving and driven gears to fail to meet design requirements, leading to abnormal noises during vehicle operation. Summary of the Invention

[0003] The purpose of this disclosure is to provide an assembly inspection method and an assembly inspection device for detecting whether the drive shaft and the hub bearing are properly assembled.

[0004] One aspect of this disclosure provides an assembly inspection method for detecting whether a drive shaft and a wheel hub bearing are properly assembled. The drive shaft and the wheel hub bearing are axially connected, and a steering knuckle is fitted onto the drive shaft and the wheel hub bearing. The assembly inspection method includes determining a first measuring position on the steering knuckle; selecting a second measuring position on the drive shaft; measuring the distance between the first measuring position and the second measuring position; setting a preset range; if the distance is within the preset range, determining that the drive shaft and the wheel hub bearing are properly assembled; if the distance exceeds the preset range, determining that the drive shaft and the wheel hub bearing are not properly assembled.

[0005] In one embodiment, determining the first measurement position on the steering knuckle includes determining a positioning point, determining the first measurement position through the positioning point, and keeping the positioning point and the first measurement position relatively fixed.

[0006] In one embodiment, determining the positioning point includes selecting a location on the outer surface of the steering knuckle as the positioning point.

[0007] In one embodiment, determining the first measurement position through the positioning point includes obtaining another position on the outer surface of the steering knuckle as the first measurement position from the positioning point along the axial direction of the drive shaft at a predetermined distance.

[0008] In one embodiment, selecting the second measurement position on the drive shaft includes selecting a position on the outer surface of the drive shaft as the second measurement position.

[0009] In one embodiment, selecting the second measurement position on the drive shaft further includes selecting the projection position of the first measurement position on the outer surface of the drive shaft as the second measurement position along the radial direction of the drive shaft.

[0010] In one embodiment, the drive shaft includes a sleeve section, a shoulder section connected to the sleeve section, and a sealing ring, the sealing ring being sleeved on the sleeve section; setting a preset range includes setting the distance from the first measuring position along the radial direction of the drive shaft to the outer surface of the sealing ring as the preset range; exceeding the preset range includes setting the distance from the first measuring position along the radial direction of the drive shaft to the outer surface of the shoulder section to exceed the preset range.

[0011] In one embodiment, when the projection of the first measuring position along the radial direction of the drive shaft is located on the sealing ring, it is determined that the drive shaft and the hub bearing are assembled in place; when the projection of the first measuring position along the radial direction of the drive shaft is located on the shoulder section, it is determined that the drive shaft and the hub bearing are not assembled in place.

[0012] In one embodiment, measuring the distance between the first measuring position and the second measuring position includes measuring the distance between the first measuring position and the second measuring position in the radial and / or axial direction of the drive shaft.

[0013] In one embodiment, the assembly inspection method includes adjusting the assembly connection between the drive shaft and the wheel hub bearing when it is determined that the drive shaft and the wheel hub bearing are not properly assembled, and then performing the assembly inspection method again.

[0014] In one embodiment, adjusting the assembly connection between the drive shaft and the hub bearing includes adjusting according to the distance.

[0015] In one embodiment, the adjustment based on the distance includes calculating the connection error dimension of the drive shaft and the hub bearing in the axial direction based on the distance, and adjusting at least one of the drive shaft and the hub bearing to move the connection error dimension.

[0016] Another aspect of this disclosure provides an assembly inspection device for detecting whether a drive shaft and a hub bearing are properly assembled; the drive shaft and the hub bearing are axially connected; a steering knuckle is sleeved on the drive shaft and the hub bearing; the assembly inspection device includes: a measuring part that contacts the outer surface of the steering knuckle to determine a first measuring position on the steering knuckle; the measuring part passes through the steering knuckle from the first measuring position and contacts the drive shaft to select a second measuring position on the drive shaft; the length of the measuring part between the first measuring position and the second measuring position is the measured distance between the first measuring position and the second measuring position; wherein:

[0017] A preset range is set; if the distance is within the preset range, it is determined that the drive shaft and the wheel hub bearing are properly assembled; if the distance exceeds the preset range, it is determined that the drive shaft and the wheel hub bearing are not properly assembled.

[0018] In one embodiment, the assembly testing device includes a positioning part connected to the steering knuckle; the positioning part is used to determine a positioning point, and the measuring part determines a first measuring position through the positioning point; the positioning part is also fixedly connected to the measuring part, so that the positioning point and the first measuring position remain relatively fixed.

[0019] In one embodiment, the positioning part is connected to the outer surface of the steering knuckle, and the connection point serves as the positioning point.

[0020] In one embodiment, the steering knuckle is provided with a positioning hole and a measuring hole. The positioning part is inserted into the positioning hole, and the positioning hole is the positioning point. The measuring part passes through the measuring hole to perform measurement, and the measuring hole is the first measuring position. The positioning hole and the measuring hole are set at a predetermined distance along the axial direction of the drive shaft, so that the measuring part obtains the first measuring position from the positioning point along the axial direction of the drive shaft at the predetermined distance.

[0021] In one embodiment, the measuring part passes through the measuring hole and contacts the outer surface of the drive shaft, with the contact point serving as the second measuring position.

[0022] In one embodiment, the measuring hole extends radially along the drive shaft, and the measuring part passes through the measuring hole radially along the drive shaft, such that the projection of the first measuring position onto the outer surface of the drive shaft is the second measuring position.

[0023] In one embodiment, the drive shaft includes a sleeve section, a shoulder section connected to the sleeve section, and a sealing ring, the sealing ring being sleeved on the sleeve section; when the second measuring position is located on the outer surface of the sealing ring, the distance is within the preset range; when the second measuring position is located on the outer surface of the shoulder section, the distance exceeds the preset range.

[0024] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0025] By measuring the distance between a first measuring position on the steering knuckle and a second measuring position on the drive shaft, and comparing the obtained distance with a preset range, it is possible to indirectly determine whether the drive shaft and wheel bearing are properly assembled, thus helping to confirm the assembly status between the drive shaft and wheel bearing. Based on the inspection results, workers can adjust the assembly between the drive shaft and wheel bearing, increasing the probability of proper assembly, preventing abnormal noises during vehicle use, and improving the user experience.

[0026] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0027] The accompanying drawings, which form part of this disclosure, are used to provide a further understanding of this disclosure. The illustrative embodiments of this disclosure and their descriptions are used to explain this disclosure and do not constitute an undue limitation of this disclosure.

[0028] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 The diagram shows an assembly structure of the drive shaft and hub bearing in one embodiment.

[0030] Figure 2 The diagram shown is a structural schematic of an assembly testing device in one embodiment.

[0031] Figure 3 for Figure 2 The cross-sectional view of the assembled testing device shown.

[0032] Figure 4 The diagram shown is a schematic of the assembly inspection device in one embodiment detecting that the drive shaft and hub bearing are assembled in place.

[0033] Figure 5 for Figure 4The diagram shows a partial view of the assembly and testing device during testing.

[0034] Figure 6 The diagram shown is a schematic of the assembly inspection device in one embodiment when no inspection is performed.

[0035] Figure 7 The diagram shown is a schematic of an assembly inspection device in one embodiment, which detects that the drive shaft and hub bearing are not properly assembled. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this disclosure clearer, the following detailed description is provided in conjunction with the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative and do not limit the scope of protection of this disclosure.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of this disclosure.

[0038] The assembly inspection method of this disclosure will now be described in detail with reference to the accompanying drawings. Unless otherwise specified, the features of the following embodiments and implementations can be combined with each other.

[0039] In one embodiment of this disclosure, an assembly inspection method is provided for detecting whether the drive shaft 1 and the hub bearing 2 are properly assembled. (Refer to...) Figure 1 As shown, drive shaft 1 and hub bearing 2 are axially connected, and steering knuckle 3 is fitted onto drive shaft 1 and hub bearing 2. The assembly inspection method includes: determining a first measuring position A on steering knuckle 3; selecting a second measuring position B on drive shaft 1; measuring the distance between the first measuring position A and the second measuring position B; setting a preset range; if the distance is within the preset range, it is determined that drive shaft 1 and hub bearing 2 are assembled in place; if the distance exceeds the preset range, it is determined that drive shaft 1 and hub bearing 2 are not assembled in place.

[0040] Thus, by measuring the distance between the first measuring position A on the steering knuckle 3 and the second measuring position B on the drive shaft 1, and comparing the obtained distance with a preset range, it is indirectly determined whether the drive shaft 1 and the wheel hub bearing 2 are properly assembled, thus assisting in confirming the assembly status between the drive shaft 1 and the wheel hub bearing 2. Workers can adjust the assembly between the drive shaft 1 and the wheel hub bearing 2 based on the inspection results of this assembly inspection method, increasing the probability of proper assembly between the drive shaft 1 and the wheel hub bearing 2.

[0041] In the embodiments of this disclosure, one end of the drive shaft 1 in the axial direction is connected to an end face tooth, which meshes with the other end face tooth. When the drive shaft 1 and the hub bearing 2 are properly assembled, including the connection of the other end of the drive shaft 1 in the axial direction to the hub bearing 2, the end face teeth meet normal gear meshing requirements, such as the pitch circle and index circle coinciding. This ensures normal meshing of the end face teeth during normal vehicle operation without abnormal noise. If the drive shaft 1 and the hub bearing 2 are not properly assembled, including the connection of the other end of the drive shaft 1 in the axial direction to the hub bearing 2 not being complete, the end face teeth cannot meet normal gear meshing requirements, such as the pitch circle and index circle not coinciding. This results in abnormal meshing of the end face teeth during normal vehicle operation, such as the presence of tooth flank clearance, and abnormal noise. Abnormal meshing of the end face teeth also accelerates wear and reduces vehicle stability.

[0042] In this embodiment, the drive shaft 1 has a shoulder 11, which abuts against the hub bearing 2 in the axial direction of the drive shaft 1. A steering knuckle 3 extends along the axial direction of the drive shaft 1. The steering knuckle 3 is fitted over the abutment and onto the hub bearing 2 and the drive shaft 1. Part of the steering knuckle 3 is fitted onto the hub bearing 2, and the other part is fitted onto the drive shaft 1. Viewed from the hub bearing 2 side, the drive shaft 1 is not visible due to the obstruction of the hub bearing 2. When assembling the hub bearing 2 and the drive shaft 1, workers cannot observe the assembly status between them, and therefore cannot determine whether the drive shaft 1 and the hub bearing 2 are properly assembled. If judgment is based solely on intuition, the probability of improper assembly between the drive shaft 1 and the hub bearing 2 is extremely high.

[0043] After assembling the wheel hub bearing 2 and drive shaft 1, the worker performs an assembly inspection using the method disclosed herein. If the inspection results indicate that the assembly is not in place, the assembly connection between the wheel hub bearing 2 and drive shaft 1 is adjusted. This significantly increases the probability of proper assembly between the drive shaft 1 and wheel hub bearing 2, preventing abnormal noises during vehicle use and improving the user experience.

[0044] Since the steering knuckle 3 is mounted on the wheel hub bearing 2 and the drive shaft 1, it is relatively easy to select the first measuring position A on the steering knuckle 3. The second measuring position B is selected on the drive shaft 1. When the drive shaft 1 is installed in different positions along the axial direction, the distance between the first measuring position A and the second measuring position B will change. Therefore, when the drive shaft 1 and the wheel hub bearing 2 are in the assembled state, the distance between the first measuring position A and the second measuring position B is within a certain range, which is set as a preset range.

[0045] By measuring the distance between the first measuring position A and the second measuring position B and comparing it with a preset range, if the distance does not exceed the preset range, it means that the drive shaft 1 and the wheel hub bearing 2 are properly assembled. If the distance is not within the preset range, it means that the drive shaft 1 and the wheel hub bearing 2 are not properly assembled and adjustment is required.

[0046] In some embodiments, the line connecting the first measuring position A and the second measuring position B extends axially along the drive shaft 1. In other embodiments, the line connecting the first measuring position A and the second measuring position B extends radially along the drive shaft 1. In still other embodiments, the line connecting the first measuring position A and the second measuring position B is located between the axial and radial directions of the drive shaft 1.

[0047] In some embodiments, determining a first measurement position A on the steering knuckle 3 includes determining a positioning point C, and using the positioning point C to determine the first measurement position A, with the positioning point C and the first measurement position A remaining relatively fixed. During the measurement of the distance between the first measurement position A and the second measurement position B, to avoid any shift in the first measurement position A, another point is selected as the positioning point C to determine the first measurement position A. During the measurement process, the first measurement position A is kept fixed relative to the positioning point C, thereby ensuring the accuracy of the distance measurement between the first measurement position A and the second measurement position B.

[0048] In some embodiments, the positioning point C may be located on the wheel hub bearing 2 or the steering knuckle 3. Preferably, in this embodiment, the positioning point C is located on the steering knuckle 3.

[0049] Determining the positioning point C involves selecting a location on the outer surface of the steering knuckle 3 as the positioning point C. It is relatively easy to select a location on the outer surface of the steering knuckle 3 as the positioning point C.

[0050] Since the steering knuckle 3 is mounted on the drive shaft 1, the first measuring position A and the second measuring position B are respectively located on the outer surface of the steering knuckle 3 and the drive shaft 1, and the line connecting the first measuring position A and the second measuring position B passes through the steering knuckle 3.

[0051] Furthermore, in this embodiment, the first measurement position A is determined by the positioning point C. This includes obtaining another position on the outer surface of the steering knuckle 3 at a predetermined distance from the positioning point C along the axial direction of the drive shaft 1. The positioning point C and the first measurement position A are arranged at intervals along the axial direction of the drive shaft 1, and the connection between the positioning point C and the first measurement position A can be set as a straight line. In this way, the first measurement position A can be easily determined by the positioning point C. The predetermined distance between the positioning point C and the first measurement position A can be 10cm, 15cm, 20cm, 25cm, etc., and this disclosure does not limit this.

[0052] Understandably, in some embodiments, a first measuring position A can be obtained from the positioning point C along the radial direction of the drive shaft 1 at predetermined intervals on another location on the outer surface of the steering knuckle 3. In other embodiments, the first measuring position A can be obtained from the positioning point C along other directions at predetermined intervals, depending on actual needs. This disclosure does not limit the relative position between the positioning point C and the first measuring position A.

[0053] In some other embodiments, the positioning point C may coincide with the first measurement point A.

[0054] In some embodiments, selecting a second measurement position B on the drive shaft 1 includes selecting a location on the outer surface of the drive shaft 1 as the second measurement position B. After passing through the steering knuckle 3, it is relatively easy to select a location on the outer surface of the drive shaft 1 as the second measurement position B.

[0055] Furthermore, in this embodiment, selecting the second measurement position B on the drive shaft 1 further includes selecting the projection position of the first measurement position A on the outer surface of the drive shaft 1 as the second measurement position B along the radial direction of the drive shaft 1. Thus, the line connecting the first measurement position A and the second measurement position B extends along the radial direction of the drive shaft 1, facilitating measurement.

[0056] Specifically, a through hole can be made on the steering knuckle 3 along the radial direction of the drive shaft 1. The opening of the through hole on the outer surface of the steering knuckle 3 is the first measuring position A, and the projection position of the through hole on the outer surface of the drive shaft 1 is the second measuring position B. It is very convenient to measure the distance between the first measuring position A and the second measuring position B by means of a tool.

[0057] In some embodiments, refer to Figure 1 , Figure 4 and Figure 7 As shown, the drive shaft 1 includes a sleeve section 12, a shoulder section 13 connected to the sleeve section 12, and a sealing ring 14. The sealing ring 14 is sleeved on the sleeve section 12. A preset range is set, including the distance from the first measuring position A along the radial direction of the drive shaft 1 to the outer surface of the sealing ring 14, which is set as the preset range. Exceeding the preset range includes the distance from the first measuring position A along the radial direction of the drive shaft 1 to the outer surface of the shoulder section 13 being set as exceeding the preset range. The sealing ring 14 is a ring extending axially along the drive shaft 1. In the actual production and assembly process of automobiles, when the sealing ring 14 is installed within the position range corresponding to the steering knuckle 3 (e.g. Figure 4 As shown), this allows the drive shaft 1 and hub bearing 2 to be properly assembled. When the sealing ring 14 is not within the position range corresponding to the steering knuckle 3, the shoulder section 13 is within that position range (as shown). Figure 7As shown in the diagram, this results in the drive shaft 1 and hub bearing 2 not being properly assembled. Therefore, the first measuring position A is set within this position range, and the distance from the outer surface of the sealing ring 14 in the axial direction of the drive shaft 1 to the first measuring position A is a preset range that allows for determining whether the drive shaft 1 and hub bearing 2 are properly assembled. Correspondingly, the distance from the outer surface of the shoulder section 13 in the axial direction of the drive shaft 1 to the first measuring position A exceeds the preset range.

[0058] Due to the presence of the shoulder 11, the distance between the sealing ring 14 and the first measuring position A differs significantly from the distance between the shoulder segment 13 and the first measuring position A. For example, in this embodiment, the distance from the outer surface of the sealing ring 14 to the first measuring position A in the axial direction of the drive shaft 1 is designed to be 30 cm. Considering the production and assembly errors of each part, the actual distance from the outer surface of the sealing ring 14 to the first measuring position A in the axial direction of the drive shaft 1 is 30 ± 0.2 cm, which is the preset range of 30 ± 0.2 cm. The distance from the outer surface of the shoulder segment 13 to the first measuring position A in the axial direction of the drive shaft 1 is designed to be 50 cm. Even considering production and assembly errors, this still differs significantly from the preset range. Therefore, it is easy to distinguish whether the drive shaft 1 and the hub bearing 2 are properly assembled by measuring the distance between the first measuring position A and the second measuring position B.

[0059] Furthermore, referring to Figure 1 and Figure 4 As shown, when the projection of the first measuring position A along the radial direction of the drive shaft 1 is located on the sealing ring 14, it is determined that the drive shaft 1 and the wheel hub bearing 2 are properly assembled; when the projection of the first measuring position A along the radial direction of the drive shaft 1 is located on the shoulder section 13, it is determined that the drive shaft 1 and the wheel hub bearing 2 are not properly assembled. Understandably, the projection of the first measuring position A on the outer surface of the drive shaft 1 is selected as the second measuring position B. When the projection of the first measuring position A along the radial direction of the drive shaft 1 is located on the sealing ring 14, the distance between the first measuring position A and the second measuring position B is within a preset range, thus enabling the determination that the drive shaft 1 and the wheel hub bearing 2 are properly assembled. When the projection of the first measuring position A along the radial direction of the drive shaft 1 is located on the shoulder section 13, the distance between the first measuring position A and the second measuring position B is outside the preset range, thus enabling the determination that the drive shaft 1 and the wheel hub bearing 2 are not properly assembled.

[0060] In some embodiments, measuring the distance between the first measuring position A and the second measuring position B includes measuring the distance between the first measuring position A and the second measuring position B in the radial direction of the drive shaft 1. In other embodiments, measuring the distance between the first measuring position A and the second measuring position B includes measuring the distance between the first measuring position A and the second measuring position B in the axial direction of the drive shaft 1. In still other embodiments, measuring the distance between the first measuring position A and the second measuring position B includes measuring the distance between the first measuring position A and the second measuring position B in both the radial and axial directions of the drive shaft 1. In actual testing, measuring the distance between the first measuring position A and the second measuring position B along the axial and radial directions of the drive shaft 1 is relatively easy. If the distance between the first measuring position A and the second measuring position B is not along the axial and radial directions of the drive shaft 1, the distance between the first measuring position A and the second measuring position B in the radial and axial directions of the drive shaft 1 can be measured first, and then the straight-line distance between the first measuring position A and the second measuring position B can be calculated.

[0061] Optionally, in some embodiments, when it is determined that the drive shaft 1 and the wheel hub bearing 2 are not properly assembled, the assembly connection between the drive shaft 1 and the wheel hub bearing 2 is adjusted, and the assembly inspection method is used again for inspection. The assembly strategy is determined under the guidance of the inspection results of the assembly inspection method. If the inspection result shows that the drive shaft 1 and the wheel hub bearing 2 are properly assembled, the assembly process of the drive shaft 1 and the wheel hub bearing 2 ends, and the next assembly process begins. If the inspection result shows that the drive shaft 1 and the wheel hub bearing 2 are not properly assembled, the assembly connection between the drive shaft 1 and the wheel hub bearing 2 is adjusted. After adjustment, the inspection is repeated, and this process is repeated until the inspection result shows that the drive shaft 1 and the wheel hub bearing 2 are properly assembled, at which point the assembly process of the drive shaft 1 and the wheel hub bearing 2 can be ended, and the next assembly process begins. This can avoid the situation where the drive shaft 1 and the wheel hub bearing 2 are not properly assembled, improving the stability and reliability of the vehicle.

[0062] In this embodiment, refer to Figure 1 As shown, the drive shaft 1 and the hub bearing 2 are connected by bolts 5. Bolts 5 pass through the hub bearing 2, with one end of the bolt head abutting against the hub bearing 2 in the axial direction of the drive shaft 1, and the other end of the bolt 5 being screwed onto the drive shaft 1. By adjusting the preload of the bolts 5, the position of the drive shaft 1 relative to the hub bearing 2 in the axial direction can be adjusted, that is, the assembly connection between the drive shaft 1 and the hub bearing 2 can be adjusted.

[0063] In other embodiments, the assembly connection between the drive shaft 1 and the hub bearing 2 is first disconnected, which can be done by removing the bolts 5, adjusting the relative position between the drive shaft 1 and the hub bearing 2, and then reassembling the drive shaft 1 and the hub bearing 2 to achieve the adjustment of the assembly connection between the drive shaft 1 and the hub bearing 2.

[0064] In some embodiments, adjusting the assembly connection between the drive shaft 1 and the hub bearing 2 includes adjusting based on the distance between a first measuring position A and a second measuring position B. The distance between the first measuring position A and the second measuring position B is measured using an assembly inspection method, and the position of the drive shaft 1 relative to the hub bearing 2 in the axial direction is adjusted based on this distance. This significantly improves the efficiency of the assembly adjustment.

[0065] Specifically, in this embodiment, adjustment is made based on the distance between the first measuring position A and the second measuring position B. This includes calculating the axial connection error dimension of the drive shaft 1 and the hub bearing 2 based on the distance, and adjusting the connection error dimension of at least one of the drive shaft 1 and the hub bearing 2. Since the shoulder section 13 is a variable diameter shaft section with a diameter that increases from small to large, the distance between the first measuring position A and the second measuring position B will change when the second measuring position B is located at different positions on the shoulder section 13. The radius of the shoulder section 13 at the second measuring position B can be calculated using the distance between the first measuring position A and the second measuring position B. Then, the axial distance between the second measuring position B and the correct position that allows the drive shaft 1 and the hub bearing 2 to be assembled in place can be derived. This axial distance is the connection dimension error. Adjusting the connection error dimension of at least one of the drive shaft 1 and the hub bearing 2 ensures that the drive shaft 1 and the hub bearing 2 are assembled in place.

[0066] For example, the distance between the first measuring position A and the second measuring position B, measured by the assembly inspection method, is 50cm. Given that the distance between the first measuring position A and the central axis of the drive shaft 1 is 90cm, the radius of the shoulder section 13 at the second measuring position B is calculated to be 40cm. Given that the radius of the sleeve section 12 at the sealing ring 14 is 43cm, based on the 3cm radius difference and the slope angle of the shoulder section 13, the axial distance between the second measuring position B and the sleeve section 12 can be calculated, which is the aforementioned connection error dimension. Next, the preload of the bolt 5 is adjusted to move the drive shaft 1 axially by the connection error dimension. The assembly inspection method is then used again to obtain the inspection result indicating that the assembly is in place.

[0067] In another embodiment of this disclosure, reference is made to Figures 2 to 4As shown, based on the assembly inspection method in any of the above embodiments, an assembly inspection device 4 is provided. The assembly inspection device 4 includes a measuring unit 42. The measuring unit 42 contacts the outer surface of the steering knuckle 3 to determine a first measuring position A on the steering knuckle 3. The measuring unit 42 passes through the steering knuckle 3 from the first measuring position A and contacts the drive shaft 1 to select a second measuring position B on the drive shaft 1. The length of the measuring unit 42 between the first measuring position A and the second measuring position B is the measured distance between the first measuring position A and the second measuring position B. Wherein: a preset range is set; if the distance is within the preset range, it is determined that the drive shaft 1 and the wheel hub bearing 2 are assembled in place; if the distance exceeds the preset range, it is determined that the drive shaft 1 and the wheel hub bearing 2 are not assembled in place.

[0068] The contact point between the measuring part 42 and the outer surface of the steering knuckle 3 is designated as the first measuring position A, and the contact point between the measuring part 42 and the drive shaft 1 is designated as the second measuring position B. The length of the measuring part 42 between the first measuring position A and the second measuring position B can be either the displacement distance of the measuring part 42 from the first measuring position A to the second measuring position B, or the physical length of the measuring part 42 located between the first measuring position A and the second measuring position B.

[0069] In some embodiments, the assembly detection device 4 includes a positioning part 41 connected to the steering knuckle 3. The positioning part 41 is used to determine a positioning point C. The measuring part 42 determines a first measuring point A through the positioning point C. The positioning part 41 is also fixedly connected to the measuring part 42, such that the positioning point C and the first measuring point A remain relatively fixed.

[0070] The connection point between the positioning part 41 and the steering knuckle 3 is designated as positioning point C. Since the positioning part 41 is fixedly connected to the measuring part 42, the distance between the positioning part 41 and the measuring part 42 is the distance between positioning point C and the first measuring point A.

[0071] Furthermore, the positioning part 41 is connected to the outer surface of the steering knuckle 3, and the connection point serves as the positioning point C.

[0072] Furthermore, the steering knuckle 3 is provided with a positioning hole 32 and a measuring hole 31. The positioning part 41 is inserted into the positioning hole 32, which is the positioning point C. The measuring part 42 passes through the measuring hole 31 to perform measurement, which is the first measuring position A. The positioning hole 32 and the measuring hole 31 are set at a predetermined distance along the axial direction of the drive shaft 1, so that the measuring part 42 obtains the first measuring position A from the positioning point C along the axial direction of the drive shaft 1 at predetermined distances. This facilitates positioning and measurement.

[0073] Specifically, in some embodiments, the measuring part 42 passes through the measuring hole 31 and contacts the outer surface of the drive shaft 1, with the contact point serving as the second measuring position B.

[0074] Optionally, in some embodiments, the measuring hole 31 extends radially along the drive shaft 1, and the measuring part 42 passes through the measuring hole 31 radially along the drive shaft 1, such that the projection of the first measuring position A onto the outer surface of the drive shaft 1 is the second measuring position B. This facilitates the insertion of the measuring part 42 into the steering knuckle 3 during measurement.

[0075] In some embodiments, when the second measuring position B is located on the outer surface of the sealing ring 14, the distance is within a preset range. That is, when the contact point between the measuring part 42 and the outer surface of the drive shaft 1 is located on the outer surface of the sealing ring 14, the distance is within a preset range.

[0076] When the second measuring position B is located on the outer surface of the shoulder section 13, the distance exceeds the preset range. That is, when the contact point between the measuring part 42 and the outer surface of the drive shaft 1 is located on the outer surface of the shoulder section 13, the distance is within the preset range.

[0077] To apply this to real-world usage scenarios, in another embodiment of this disclosure, reference is made to... Figures 2 to 4 As shown, an assembly inspection device 4 is provided for detecting whether a drive shaft 1 and a wheel hub bearing 2 are properly assembled. The assembly inspection device 4 includes a positioning part 41 and a measuring part 42. The positioning part 41 is connected to a steering knuckle 3 and is used to fix the assembly inspection device 4. The measuring part 42 is connected to the positioning part 41, and the measuring part 42 passes through the steering knuckle 3 from a first measuring position A on the outer surface of the steering knuckle 3 and contacts the drive shaft 1, with the contact point being a second measuring position B. The measuring part 42 is used to measure the distance between the first measuring position A and the second measuring position B. Wherein: if the distance is within a preset range, it is determined that the drive shaft 1 and the wheel hub bearing 2 are properly assembled; if the distance exceeds the preset range, it is determined that the drive shaft 1 and the wheel hub bearing 2 are not properly assembled.

[0078] Thus, after assembling and connecting the drive shaft 1 and the wheel hub bearing 2, the worker uses the assembly inspection device 4 to measure the distance between the first measuring position A on the outer surface of the steering knuckle 3 and the second measuring position B on the drive shaft 1. The obtained distance is compared with a preset range to indirectly determine whether the drive shaft 1 and the wheel hub bearing 2 are properly assembled, thus assisting in confirming the assembly status between them. Based on the inspection results of this assembly inspection method, the worker can adjust the assembly between the drive shaft 1 and the wheel hub bearing 2, increasing the probability of proper assembly. Furthermore, using the assembly inspection device 4 of this disclosure for inspection is simple and convenient.

[0079] In some embodiments, refer to Figure 4 and Figure 5 As shown, the steering knuckle 3 is provided with a measuring hole 31 for the measuring part 42 to pass through. The positioning part 41 is fixed at the positioning point C.

[0080] Optionally, in some embodiments, reference continues to be made to... Figure 4 and Figure 5 As shown, the positioning part 41 includes a positioning member 411 and a locking member 412 connected to the positioning member 411. The extending directions of the positioning member 411 and the locking member 412 intersect, and the measuring part 42 is connected to the locking member 412. The steering knuckle 3 has a positioning hole 32 corresponding to the positioning member 411. The positioning member 411 is inserted into the positioning hole 32, and the locking member 412 fits against the steering knuckle 3 around the positioning hole 32. The positioning member 411 inserted into the positioning hole 32 and the locking member 412 fitting against the steering knuckle 3 keep the positioning part 41 fixed relative to the steering knuckle 3, thereby keeping the measuring part 42 connected to the locking member 412 fixed. In this way, the measuring part 42 can remain stable during measurement, reducing measurement errors.

[0081] Specifically, in this embodiment, one end of the positioning member 411 is connected to the locking member 412, and the other end is conical to facilitate insertion into the positioning hole 32. The positioning member 411 and the positioning hole 32 are interference-fitted. The locking member 412 is plate-shaped. The extending directions of the positioning member 411 and the locking member 412 are perpendicular to each other.

[0082] In some embodiments, the positioning part 41 is a connecting structure with a through hole, and the steering knuckle 3 has a corresponding positioning hole on the positioning part 41. By aligning the through hole and the positioning hole, inserting a pin or tightening a bolt, a fixed connection between the positioning part 41 and the steering knuckle 3 is achieved. In other embodiments, other connection methods may also be used to fix the positioning part 41 and the steering knuckle 3, and this disclosure does not limit this.

[0083] Optionally, in some embodiments, reference is made to Figures 4 to 6 As shown, the measuring unit 42 includes a main body 421 and a measuring member 422. The measuring member 422 is slidably connected to the main body 421 along the extending direction of the main body 421. Before assembly inspection, refer to... Figure 5 and Figure 6 As shown, the reference measuring component 422 is located in a first position relative to the body 421 in the extending direction of the body 421. During assembly inspection, the reference... Figure 4 and Figure 5 As shown, the measuring element 422 is located in a second position relative to the main body 421 in the extending direction of the main body 421. The measuring element 422 passes through the steering knuckle and contacts the drive shaft. The distance between the first measuring position A and the second measuring position B is calculated by the distance between the first and second positions. The measuring element 422 slides from the first position to the second position along the extending direction of the main body 421, and the distance between the first measuring position A and the second measuring position B can be calculated by the sliding distance. Thus, the detection is convenient and quick.

[0084] The measuring element 422 may be provided with a size scale, for example, at the edge where the measuring element 422 extends in the same direction as the main body 421, for easy observation.

[0085] The end of the measuring element 422 that contacts the drive shaft 1 can be set as a pointed tip to minimize the contact point and improve the accuracy of the detection results.

[0086] In this embodiment, the main body 421 is provided with a slide rail extending in the same direction as the main body 321, and the measuring component 422 is correspondingly provided with a slide groove. The measuring component 422 achieves a sliding connection with the main body 321 through the assembly connection of the slide groove and the slide rail. Specifically, the cross-section of the slide rail can be T-shaped, and the slide groove is mounted on the slide rail and hooks onto the T-shaped slide rail to prevent it from falling off. In other embodiments, the measuring component 422 can achieve a sliding connection with the main body 321 through other connection methods, and this disclosure does not limit this.

[0087] Furthermore, in some embodiments, reference is made to Figure 4 and Figure 5 As shown, the main body 421 includes a first end 421a and a second end 421b disposed opposite to each other. The first end 421a is in contact with the steering knuckle 3 on the periphery of the first measuring position A. When the measuring element 422 is in the first position, the measuring element 422 and the first end 421a are flush. The distance between the first position and the second position is the distance between the first measuring position A and the second measuring position B. The first end 421a corresponds to the zero point of the measuring element 422, that is, the measurement starting point. By attaching the first end 421a to the steering knuckle 3 on the periphery of the first measuring position A, and when not being detected, one end of the measuring element 422 is flush with the first end 421a, so that the measuring element 422 slides from the zero point, and the sliding distance is the distance between the first measuring position A and the second measuring position B.

[0088] Specifically, when the measuring element 422 is in the first position, one end of the measuring element 422 is located at the first measuring position A. When the measuring element 422 is in the second position, the end of the measuring element slides to the second measuring position B. The sliding stroke of the measuring element is the distance between the first measuring position A and the second measuring position B.

[0089] In some embodiments, the measuring unit 42 includes a measuring system (not shown) disposed on the main body 421 and the measuring element 422. The measuring system includes a sensing unit, a control unit, and a display unit. The sensing unit and the display unit are respectively connected to the control unit. The control unit acquires the sliding distance of the measuring element 422 measured by the sensing unit, calculates the distance between the first measuring position and the second measuring position using the distance between the first position and the second position, and sends it to the display unit for display. In this way, when the worker uses the assembly inspection device 4 to perform measurements, he / she can read the measurement results through the display unit, which is convenient for use.

[0090] Specifically, the sensing unit can employ a grating sensor. The grating sensor consists of two sets of strip electrodes placed opposite each other: one set is a moving grating, and the other is a fixed grating. The moving grating is located on the measuring element 422, and the fixed grating is located on the main body 421. The moving and fixed gratings are electrostatically coupled to measure the displacement of the measuring element 422.

[0091] The control unit can employ a microprocessor and memory to store sensor measurement data and perform calculations.

[0092] The display section can use an electronic display screen to show numbers.

[0093] In this embodiment, refer to Figure 5 As shown, the measuring unit 42 includes a boss 423 connected to the measuring member 422 and sliding along with the measuring member 422. The boss 423 is used to house at least part of the sensing unit, control unit, and display unit. In other embodiments, the boss 423 may be disposed on the main body 421 and remain fixed.

[0094] One end of the main body 421 is connected to the locking member 412. The main body 421 and the positioning member 411 are located on opposite sides of the locking member 412 in a direction perpendicular to its extension. A zero-position hole 4121 is provided on the locking member 412 corresponding to the measuring member 422. Before assembly and inspection, the measuring member 422 does not protrude through the zero-position hole 4121. During assembly and inspection, the measuring member 422 slides along the extension direction of the main body 421, protruding through the zero-position hole 4121 and the measuring hole 31.

[0095] Before assembly and inspection, a portion of the measuring component 422 is placed inside the zero-position hole 4121, with one end of the measuring component 422 flush with the locking component 412, serving as the starting point for measurement. During assembly and inspection, the positioning component 411 is inserted into the positioning hole 32 until the locking component 412 and the steering knuckle 3 are in contact, and the zero-position hole 4121 and the measuring hole 31 are aligned.

[0096] Furthermore, in some embodiments, the control unit calculates the connection error dimension of the drive shaft 1 and the hub bearing 2 in the axial direction based on the sliding distance of the measuring element 422 measured by the sensing unit, and sends it to the display unit for display. Thus, the worker adjusts at least one of the drive shaft 1 and the hub bearing 2 according to the connection error dimension displayed on the display unit, moving the connection error dimension so that the drive shaft 1 and the hub bearing 2 are properly assembled. This results in high assembly and adjustment efficiency.

[0097] In some embodiments, refer to Figure 2 As shown, the measuring part 42 includes a limiting part 424 disposed on the main body 421 and the measuring member 422. When the measuring member 422 is in the first position, the limiting part 424 restricts the measuring member 422 from sliding along the extension direction of the main body 421.

[0098] Specifically, the limiting part 424 includes a first limiting part 4241, located at the end of the main body 421 away from the locking member 412. In this embodiment, the first limiting part 4241 is a stop. After assembly and inspection are completed, the measuring member 422 is slid back along its original path until the measuring member 422 and the stop abut against each other, preventing the measuring member 422 from dislodging from the slide rail. When the measuring member 422 and the stop abut against each other, the measuring member 422 is in the first position, which is also the zero point position.

[0099] The limiting part 424 also includes a second limiting part (not shown), which cooperates with the first limiting part 4241 to fix the measuring element 422 at the first position, ensuring that the measuring element 422 is fixed and will not slide freely when measurement is not required. The second limiting part can be a stop that pops out when the measuring element 422 is in the first position.

[0100] In some embodiments, the limiting part 424 may be a sphere connected to an elastic body, and the measuring member 422 has a groove corresponding to the sphere. When the measuring member 422 is in the first position, the sphere is ejected by the elastic force of the elastic body and inserted into the groove, fixing the measuring member 422 in the extending direction of the main body 421. When it is necessary to slide the measuring member 422, the measuring member 422 is pushed forcefully, which can push the sphere out of the groove, and the measuring member 422 returns to a free sliding state.

[0101] In other embodiments, the positioning portion 41 and the measuring portion 42 are fixed on the same side of the positioning member 412 in a direction perpendicular to the extension of the positioning member 412. When the positioning member 411 is inserted into the positioning hole 32, at least a portion of the measuring portion 42 is located between the first measuring position A and the second measuring position B. Thus, the length of the measuring portion 42 located between the first measuring position A and the second measuring position B is the distance between the first measuring position A and the second measuring position B.

[0102] During assembly inspection, insert the locking piece 412 into the positioning hole 32, and insert the measuring part 42 into the measuring hole 31. Press the assembly inspection device 4 towards the steering knuckle 3 until the measuring part 42 contacts the drive shaft 1. At this time, the length of the measuring part 42 extending into the positioning hole 32 is the distance between the first measuring position A and the second measuring position B.

[0103] Understandably, the extension length of the measuring section 42 needs to be greater than or equal to the maximum distance between the first measuring position A and the second measuring position B. In this embodiment, the maximum distance between the first measuring position A and the second measuring position B is the distance from the minimum diameter of the shoulder section 13 to the first measuring position A.

[0104] The first measuring position A is the opening of the measuring hole 31 located on the outer surface of the steering knuckle 3.

[0105] In this embodiment, refer to Figure 3As shown, the extending directions of the positioning part 41 and the measuring part 42 are nearly parallel, and the positioning part 41 and the measuring part 42 are offset from each other in the radial direction of the positioning part 41. This facilitates the observation of the measurement status and measurement results of the measuring part 42.

[0106] The extending direction of the locking member 412 is perpendicular to the extending direction of the positioning part 41 and the measuring part 42.

[0107] Correspondingly, refer to Figure 5 As shown, the positioning hole 32 and the measuring hole 31 also extend radially along the drive shaft. The positioning part 41 is inserted into the positioning hole 32, and the measuring part 42 passes through the measuring hole 31 to perform measurement. This facilitates the machining of the positioning hole 32 and the measuring hole 31.

[0108] In some embodiments, the positioning hole 32 and the measuring hole 31 are existing through holes on the steering knuckle 3, such as sensor mounting holes, thus avoiding additional machining steps on the steering knuckle 3 and saving costs.

[0109] In other embodiments, the positioning part 41 and the measuring part 42 extend coaxially, and the assembly detection device 4 is generally cylindrical in structure. Correspondingly, the positioning hole 32 and the measuring hole 31 are configured as the same through hole.

[0110] In the description of this disclosure, it should be understood that the terms "middle", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this disclosure.

[0111] Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0112] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0113] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0114] It should be noted that when a component is described as "fixed to," "set on," "fixed to," or "mounted on" another component, it can be directly on the other component or there may be an intervening component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intervening component. Furthermore, when a component is considered to be "fixedly connected" to another component, the connection can be detachable or non-detachable, such as through socketing, snap-fitting, integral molding, welding, etc., which are achievable in conventional technologies and will not be elaborated upon here.

[0115] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0116] The above embodiments are merely illustrative of several implementation methods of this disclosure, and their descriptions are relatively specific and detailed. However, they should not be construed as limiting the scope of the invention patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the inventive concept of this disclosure, and these modifications and improvements all fall within the protection scope of this disclosure.

Claims

1. An assembly inspection method for detecting whether a drive shaft and a wheel hub bearing are properly assembled, wherein the drive shaft and the wheel hub bearing are axially connected, and a steering knuckle is sleeved on the drive shaft and the wheel hub bearing, characterized in that, The assembly inspection method includes: Determine the first measurement position on the outer surface of the steering knuckle; A second measuring position is selected on the outer surface of the drive shaft; the line connecting the first measuring position and the second measuring position passes through the steering knuckle; Measure the distance between the first measurement bit and the second measurement bit; A preset range is set; if the distance is within the preset range, it is determined that the drive shaft and the wheel hub bearing are properly assembled; if the distance exceeds the preset range, it is determined that the drive shaft and the wheel hub bearing are not properly assembled.

2. The assembly inspection method as described in claim 1, characterized in that, Determining the first measurement position on the steering knuckle includes determining a positioning point, determining the first measurement position through the positioning point, and keeping the positioning point and the first measurement position relatively fixed.

3. The assembly inspection method as described in claim 2, characterized in that, The determination of the positioning point includes selecting a position on the outer surface of the steering knuckle as the positioning point.

4. The assembly inspection method as described in claim 3, characterized in that, Determining the first measurement position through the positioning point includes obtaining another position on the outer surface of the steering knuckle as the first measurement position from the positioning point along the axial direction of the drive shaft at a set distance.

5. The assembly inspection method as described in claim 1, characterized in that, Selecting the second measurement position on the drive shaft includes selecting a position on the outer surface of the drive shaft as the second measurement position.

6. The assembly inspection method as described in claim 5, characterized in that, The step of selecting the second measurement position on the drive shaft further includes selecting the projection position of the first measurement position on the outer surface of the drive shaft as the second measurement position along the radial direction of the drive shaft.

7. The assembly inspection method as described in claim 6, characterized in that, The drive shaft includes a sleeve section, a shoulder section connected to the sleeve section, and a sealing ring, the sealing ring being sleeved on the sleeve section; setting a preset range includes setting the distance from the first measuring position along the radial direction of the drive shaft to the outer surface of the sealing ring as the preset range; exceeding the preset range includes setting the distance from the first measuring position along the radial direction of the drive shaft to the outer surface of the shoulder section to exceed the preset range.

8. The assembly inspection method as described in claim 7, characterized in that, When the projection of the first measuring position along the radial direction of the drive shaft is located on the sealing ring, it is determined that the drive shaft and the hub bearing are properly assembled; when the projection of the first measuring position along the radial direction of the drive shaft is located on the shoulder section, it is determined that the drive shaft and the hub bearing are not properly assembled.

9. The assembly inspection method as described in claim 1, characterized in that, Measuring the distance between the first measuring position and the second measuring position includes measuring the distance between the first measuring position and the second measuring position in the radial and / or axial directions of the drive shaft.

10. The assembly inspection method as described in claim 1, characterized in that, The assembly inspection method includes adjusting the assembly connection between the drive shaft and the wheel hub bearing when it is determined that the drive shaft and the wheel hub bearing are not properly assembled, and then performing the inspection again using the assembly inspection method.

11. The assembly inspection method as described in claim 10, characterized in that, The adjustment of the assembly connection between the drive shaft and the hub bearing includes adjustment based on the distance.

12. The assembly inspection method as described in claim 11, characterized in that, The adjustment based on the distance includes calculating the connection error dimension of the drive shaft and the hub bearing in the axial direction based on the distance, and adjusting at least one of the drive shaft and the hub bearing to move the connection error dimension.

13. An assembly testing device, characterized in that, A device for detecting whether a drive shaft and a wheel hub bearing are properly assembled; the drive shaft and the wheel hub bearing are axially connected; a steering knuckle is fitted onto the drive shaft and the wheel hub bearing; characterized in that the assembly detection device comprises: A measuring part contacts the outer surface of the steering knuckle to determine a first measuring position on the steering knuckle; the measuring part passes through the steering knuckle from the first measuring position and contacts the drive shaft to select a second measuring position on the drive shaft; the length of the measuring part between the first measuring position and the second measuring position is the measured distance between the first measuring position and the second measuring position; wherein: A preset range is set; if the distance is within the preset range, it is determined that the drive shaft and the wheel hub bearing are properly assembled; if the distance exceeds the preset range, it is determined that the drive shaft and the wheel hub bearing are not properly assembled.

14. The assembly testing device as described in claim 13, characterized in that, The assembly testing device includes a positioning part connected to the steering knuckle; the positioning part is used to determine the positioning point, and the measuring part determines the first measuring position through the positioning point; the positioning part is also fixedly connected to the measuring part, so that the positioning point and the first measuring position remain relatively fixed.

15. The assembly testing device as described in claim 14, characterized in that, The positioning part is connected to the outer surface of the steering knuckle, and the connection point serves as the positioning point.

16. The assembly testing device as described in claim 15, characterized in that, The steering knuckle is provided with a positioning hole and a measuring hole. The positioning part is inserted into the positioning hole, and the positioning hole is the positioning point. The measuring part passes through the measuring hole to perform measurement, and the measuring hole is the first measuring position. The positioning hole and the measuring hole are set at a set distance along the axial direction of the drive shaft, so that the measuring part obtains the first measuring position from the positioning point along the axial direction of the drive shaft at the set distance.

17. The assembly testing device as described in claim 16, characterized in that, The measuring part passes through the measuring hole and contacts the outer surface of the drive shaft, and the contact point serves as the second measuring position.

18. The assembly testing device as described in claim 17, characterized in that, The measuring hole extends radially along the drive shaft, and the measuring part passes through the measuring hole radially along the drive shaft, such that the projection of the first measuring position on the outer surface of the drive shaft is the second measuring position.

19. The assembly testing device as described in claim 17, characterized in that, The drive shaft includes a sleeve section, a shoulder section connected to the sleeve section, and a sealing ring, the sealing ring being sleeved on the sleeve section; when the second measuring position is located on the outer surface of the sealing ring, the distance is within the preset range; when the second measuring position is located on the outer surface of the shoulder section, the distance exceeds the preset range.

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