Detection device suitable for circular run-out detection of differential mechanisms with different outer diameters

Abstract

The utility model provides a detection device suitable for circular run-out detection of differential mechanisms with different outer diameters. The detection device comprises a workbench, a translation mechanism is installed on the workbench, a positioning mechanism is installed on a moving part of the translation mechanism, and a differential mechanism shell is installed on the positioning mechanism. The detection mechanism comprises a supporting frame, a connecting plate is transversely installed on the top, and detection plates are symmetrically arranged on the upper and lower sides of the connecting plate. The detection ends of the two detection plates are located on the upper side and the lower side of the differential shell respectively and provided with the measurement sensors respectively. An adjusting block is arranged between each detection plate and the connecting plate, and the adjusting blocks, the detection plates and the connecting plate are all in sliding connection with vertically arranged guide columns. According to the detection device suitable for circular run-out detection of differential mechanisms with different outer diameters, through cooperative work of the translation mechanism, the positioning mechanism and the detection mechanism, the detection device is suitable for differential mechanism shells with different outer diameters, the detection device does not need to be replaced or equipment does not need to be greatly adjusted, and the universality and adaptability of the device are improved.

Description

Technical Field

[0001] This utility model belongs to the field of differential housing testing technology, and in particular relates to a testing device suitable for detecting the circular runout of differentials with different outer diameters. Background Technology

[0002] In the automotive manufacturing industry, the differential is a critical component, and the quality of its housing has a significant impact on vehicle performance and safety. During the manufacturing process, the differential housing is prone to excessive runout due to factors such as machining precision and assembly errors. Excessive runout can cause vibration and noise during differential operation, reduce transmission accuracy and service life, and may even lead to vehicle safety accidents. Therefore, accurate runout testing of the differential housing is crucial.

[0003] Traditional testing methods often employ specialized gauges in conjunction with manual measurement, which has several drawbacks. Firstly, they lack versatility; different gauges are required for differential housings of varying outer diameters, leading to high costs and cumbersome replacement processes. Secondly, testing efficiency is low, with numerous manual steps and lengthy processing times, making it difficult to meet the rapid testing needs of large-scale production lines. Furthermore, traditional testing equipment requires a high level of expertise from both the operating environment and the operators, limiting its widespread application. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model aims to propose a detection device suitable for detecting the circular runout of differentials with different outer diameters. This detection device solves the problem of poor universality and inability to detect the runout of differential housings with different outer diameters in the prior art.

[0005] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0006] A detection device for detecting the circular runout of differentials with different outer diameters includes a worktable, a translation mechanism mounted on the worktable, a positioning mechanism mounted on the moving part of the translation mechanism, a differential housing mounted longitudinally on the positioning mechanism, and the moving part used to laterally move the positioning mechanism closer to or away from the detection mechanism.

[0007] The detection mechanism includes a support frame located at one end of the translation mechanism and mounted on a workbench at its bottom. A connecting plate is horizontally mounted on the top of the support frame, and a set of detection plates are symmetrically arranged on the upper and lower sides of the connecting plate. The detection ends of the two detection plates are located on the upper and lower sides of the differential housing, respectively, and each plate is equipped with a measuring sensor for detecting differential housing runout. An adjusting block for adjusting the height of the detection plate is provided between each detection plate and the connecting plate. The adjusting block, the detection plate, and the connecting plate are all slidably connected to a vertically arranged guide column.

[0008] Furthermore, the number of the detection mechanisms is three sets, and the three sets of detection mechanisms are respectively used to measure the two ends and the middle of the differential housing.

[0009] Furthermore, there are two guide posts. Both the detection plate and the connecting plate are provided with two guide holes for the guide posts to pass through. Each of the two guide holes is provided with a locking part. A longitudinal channel in the shape of an inverted triangle is provided between the two locking parts. A pin is placed in the longitudinal channel. A set screw is provided above the pin. A vertical screw hole for installing the set screw is provided between the two guide holes.

[0010] Furthermore, a cylindrical longitudinal channel 2 is provided below the two locking parts 1, and the longitudinal channel 2 is connected to the longitudinal channel 1; when the set screw 1 tightens the pin 1, the width of the cross section at the connection point is smaller than the diameter of the pin 1.

[0011] Furthermore, the adjusting block is provided with two sliding grooves for the guide post to pass through, and a longitudinal screw hole is provided between the two sliding grooves. The longitudinal screw hole is threadedly connected to the locking screw, and a ball handle is installed at the tail of the locking screw.

[0012] Furthermore, the support frame and the connecting plate are connected by a limiting assembly, which includes a limiting frame, limiting posts, and a limiting plate. One side of the limiting frame is connected to the side of the support frame near the translation mechanism. Two limiting posts are longitudinally installed on the top of the limiting frame, and the limiting posts are slidably connected to the connecting plate. The limiting plate is installed on the top of the support frame, and the limiting plate has slots for limiting the connecting plate. The number of slots matches the number of connecting plates.

[0013] Furthermore, two arc-shaped grooves for engaging with the limiting post are provided at the connection between the connecting plate and the limiting post. Locking parts are provided on adjacent sides of the two arc-shaped grooves. A longitudinal channel in the shape of an inverted triangle is provided between the two locking parts. A pin is installed in the longitudinal channel. The two inclined sides of the longitudinal channel that contact the pin are stepped. A set screw is provided above the pin and is threaded to the connecting plate.

[0014] Furthermore, the translation mechanism includes two guide rails arranged laterally on the worktable, the two guide rails being slidably connected to a slide block, and a positioning mechanism being installed on the slide block; the slide block is connected to the sliding end of a cylinder, and the cylinder is installed on the worktable; proximity switch brackets are spaced apart on the worktable along the sliding direction of the slide block, and the switch brackets are used to install proximity switches for detecting the position of the slide block.

[0015] Furthermore, the guide rail is provided with a buffer seat near the support frame end, and the slide is provided with a buffer assembly near the buffer seat side. The buffer assembly includes a positioning post and a buffer post. The buffer seat is provided with a positioning groove corresponding to the positioning post and a buffer channel corresponding to the buffer post.

[0016] Furthermore, the positioning mechanism includes a positioning plate one and a positioning plate two, which are symmetrically arranged longitudinally on the slide. Both the positioning plate one and the positioning plate two have U-shaped grooves for placing the differential housing. L-shaped plates for limiting the differential housing are respectively installed on both sides of the positioning plate one. Limiting grooves are provided on the contact side of the L-shaped plates with the differential housing, and the shape of the limiting grooves corresponds to the shape of the differential housing.

[0017] Compared with existing technologies, the detection device for detecting the circular runout of differentials with different outer diameters described in this utility model has the following advantages:

[0018] The detection device for detecting the circular runout of differentials with different outer diameters, as described in this utility model, can quickly and accurately detect the circular runout of the differential housing through the coordinated work of the translation mechanism, positioning mechanism, and detection mechanism. An adjustment block is provided between each detection plate and the connecting plate, and all are slidably connected to a vertically arranged guide column. This allows for easy replacement of adjustment blocks of different heights to flexibly adjust the height of the detection plate, adapting to differential housings of different outer diameters. This eliminates the need to replace the detection device or make significant adjustments to the equipment, thus improving the versatility and adaptability of the device.

[0019] The detection ends of the two detection plates in the same set of detection components are located on the upper and lower sides of the differential housing and are equipped with measurement sensors. This layout can simultaneously detect the runout of the upper and lower parts of the differential housing, realize multi-point measurement, and obtain more comprehensive information on the runout of the differential housing. Compared with single-point detection, it can more accurately determine whether the runout of the differential housing exceeds the standard, ensuring the accuracy of the detection results. Attached Figure Description

[0020] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0021] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0022] Figure 2 for Figure 1 Enlarged view of part A in the diagram;

[0023] Figure 3 This is a schematic diagram of the detection plate structure provided in an embodiment of the present utility model;

[0024] Figure 4 A schematic diagram of the connecting plate structure provided in an embodiment of this utility model;

[0025] Figure 5 A schematic diagram of the positioning mechanism provided in an embodiment of this utility model;

[0026] Figure 6 for Figure 5 Enlarged view of part B in the diagram;

[0027] Figure 7 A schematic diagram of the buffer seat structure provided in this embodiment of the utility model;

[0028] Figure 8 for Figure 7 Enlarged view of part of C;

[0029] Figure 9 A schematic diagram of the positioning groove and positioning post provided in an embodiment of this utility model;

[0030] Figure 10 for Figure 1 The provided overall structural left view;

[0031] Figure 11 for Figure 1 The provided right view of the overall structure.

[0032] Explanation of reference numerals in the attached figures:

[0033] 1. Worktable; 2. Translation mechanism; 21. Guide rail; 22. Slide; 221. Positioning post; 222. Buffer post; 23. Cylinder; 24. Switch bracket; 25. Buffer seat; 251. Positioning groove; 252. Buffer channel; 3. Positioning mechanism; 31. Positioning plate one; 32. Positioning plate two; 33. L-shaped plate; 34. Limit groove; 4. Differential housing;

[0034] 501. Support frame; 502. Connecting plate; 503. Detection plate; 504. Adjusting block; 505. Guide post; 506. Measuring sensor; 507. Guide hole; 508. Locking part one; 509. Pin one; 510. Set screw one; 511. Vertical screw hole; 512. Slide groove; 513. Locking screw; 514. Spherical handle; 515. Limiting frame; 516. Limiting post; 517. Limiting plate; 518. Slot; 519. Arc groove; 520. Locking part two; 521. Pin two; 522. Set screw two; 523. Vertical plate; 524. Horizontal plate. Detailed Implementation

[0035] It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0036] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not 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 utility model. 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 indicated technical features. Thus, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0037] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0038] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0039] like Figures 1 to 11 As shown, a detection device for detecting the circular runout of differentials with different outer diameters includes a worktable 1, a translation mechanism 2 installed on the worktable 1, a positioning mechanism 3 installed on the moving part of the translation mechanism 2, a differential housing 4 longitudinally installed on the positioning mechanism 3, and the moving part being used to move the positioning mechanism 3 laterally closer to or away from the detection mechanism.

[0040] The detection mechanism includes a support frame 501, a connecting plate 502, a detection plate 503, an adjusting block 504, a guide column 505, and a measuring sensor 506. The support frame 501 is located at one end of the translation mechanism and its bottom is mounted on the worktable 1. The connecting plate 502 is horizontally mounted on the top of the support frame 501, and a set of detection plates 503 are symmetrically arranged on the upper and lower sides of the connecting plate 502. The detection ends of the two detection plates 503 are located on the upper and lower sides of the differential housing 4, respectively, and measuring sensors 506 for detecting the runout of the differential housing 4 are installed on them. An adjusting block 504 for adjusting the height of the detection plate 503 is provided between each detection plate 503 and the connecting plate 502. The adjusting block 504, the detection plate 503, and the connecting plate 502 are all slidably connected to the vertically arranged guide column 505.

[0041] In a preferred embodiment of this utility model, the number of detection mechanisms is three sets. The three sets of detection mechanisms are respectively used to measure the two ends and the middle of the differential housing 4, so as to realize multi-point measurement and obtain the runout of the differential housing more comprehensively.

[0042] In a preferred embodiment of this utility model, there are two guide posts 505. The detection plate 503 and the connecting plate 502 are each provided with two guide holes 507 for the guide posts 505 to pass through. Each of the two guide holes 507 has a locking part 508 on an adjacent side. A longitudinal channel in the shape of an inverted triangle is provided between the two locking parts 508. A pin 509 is placed in the longitudinal channel. A set screw 510 is provided above the pin 509. A vertical screw hole 511 for installing the set screw 510 is provided between the two guide holes 507.

[0043] Below the two locking parts 508, a cylindrical longitudinal channel 2 is provided, which is connected to the longitudinal channel 1. When the set screw 510 tightens the pin 509, the width of the cross section at the connection point is smaller than the diameter of the pin 509, so that when the set screw 510 tightens the pin 509, the pin 509 can be firmly locked in the longitudinal channel 1, with a good locking effect. It will not loosen due to long-term use or vibration, ensuring that the detection mechanism is always in a stable working state.

[0044] Specifically, two guide posts 505 vertically penetrate the detection plate 503, adjusting block 504, and connecting plate 502. By tightening the set screw 510, the set screw 510 is pressed downward against the pin 509. The pin 509 moves downward, locking the two locking parts 508 to their corresponding guide posts 505. Depending on the actual height of the differential housing 4 and the testing requirements, the detection plate 503 can be easily moved up and down to find a suitable testing position. Then, the set screw 510 is tightened to lock it, meeting the testing requirements of different specifications of differential housing 4 and improving the versatility and adaptability of the device.

[0045] In a preferred embodiment of the present invention, the adjusting block 504 is provided with two sliding grooves 512 for the guide post 505 to pass through, and a longitudinal screw hole is provided between the two sliding grooves 512. The longitudinal screw hole is threadedly connected to the locking screw 513, and a ball handle 514 is installed at the tail of the locking screw 513.

[0046] Specifically, the slide groove 512 provides a guide path for the sliding of the adjusting block 504 on the guide post 505, allowing the adjusting block 504 to move stably up and down along the guide post 505. By tightening the locking screw 513, the adjusting block 504 can be moved to the desired height on the guide post 505 and then locked in place. The cooperation between the longitudinal screw hole and the locking screw 513 realizes the height adjustment and locking functions of the adjusting block 504. The design of the ball handle 514 makes it easier for the operator to apply force, making the locking operation more convenient and quick. When inspecting differential housings 4 with different outer diameters or heights, adjusting blocks 504 of different heights can be replaced, so that the test plate 503 can accurately contact the differential housing 4 for inspection.

[0047] In a preferred embodiment of this utility model, the support frame 501 and the connecting plate 502 are connected by a limiting component. The limiting component includes a limiting frame 515, limiting posts 516, and a limiting plate 517. One side of the limiting frame 515 is connected to the side of the support frame 501 near the translation mechanism. Two limiting posts 516 are longitudinally installed on the top of the limiting frame 515, and the limiting posts 516 are slidably connected to the connecting plate 502. The limiting plate 517 is installed on the top of the support frame 501, and the limiting plate 517 has slots 518 for limiting the connecting plate 502. The number of slots 518 matches the number of connecting plates 502. A spherical handle 514 is installed on the limiting plate 517.

[0048] Two arc-shaped grooves 519 are provided at the connection between the connecting plate 502 and the limiting post 516 for engaging with the limiting post 516. The two arc-shaped grooves 519 are provided with locking parts 520 on adjacent sides. A longitudinal channel 2 in the shape of an inverted triangle is provided between the two locking parts 520. A pin 2 521 is installed in the longitudinal channel 2. The two inclined sides of the longitudinal channel 2 that contact the pin 2 521 are stepped. A set screw 2 522 is provided above the pin 2 521. The set screw 2 522 is threadedly connected to the connecting plate 502.

[0049] Specifically, the limit bracket 515 is bolted to the support bracket 501. Through the cooperation of the second pin 521 and the second set screw 522, the second locking part 520 is locked to the limit post 516, enabling quick locking or loosening of the connecting plate 502, facilitating position adjustment to accommodate different specifications of differential housing 4. The position of the slot 518 on the limit plate 517 corresponds to the position of the connecting plate 502.

[0050] The slot 518 on the limiting plate 517 can hold the connecting plate 502 in place. Together with the locking part 520, the connecting plate 502 is double-locked in a specific position to prevent it from shifting due to external force during the detection process.

[0051] The cross-sectional width below the second longitudinal channel is smaller than the diameter of the second pin 521, allowing the second pin 521 to be securely locked within the second longitudinal channel, enhancing the locking effect. The two inclined sides of the second longitudinal channel that contact the second pin 521 are stepped, preventing the second pin 521 from jumping left and right, thus improving the stability and reliability of the detection device.

[0052] In a preferred embodiment of the present invention, the support frame 501 includes a vertical plate 523 and a horizontal plate 524. The two vertical plates 523 are arranged longitudinally at one end of the translation mechanism 2, and a horizontal plate 524 is installed at the middle and top of the two vertical plates 523 respectively.

[0053] Specifically, horizontal plates 524 are installed in the middle and top of the vertical plate 523 respectively. The horizontal plates 524 connect the two vertical plates 523 into a whole, forming a rigid frame structure, which enhances the overall rigidity and stability of the support frame and can effectively distribute and bear various loads generated during the testing process, thereby improving the testing accuracy and reliability.

[0054] In a preferred embodiment of this utility model, the translation mechanism 2 includes a guide rail 21, a slide 22, a positioning post 221, a buffer post 222, a cylinder 23, a switch bracket 24, a buffer seat 25, a positioning groove 251, and a buffer channel 252; two guide rails 21 are horizontally arranged on the workbench 1, and the two guide rails 21 are slidably connected to the slide 22, and the positioning mechanism 3 is installed on the slide 22; the slide 22 is connected to the sliding end of the cylinder 23, and the cylinder 23 is installed on the workbench 1; proximity switch brackets 24 are spaced apart on the workbench 1 along the moving direction of the slide 22, and the switch brackets 24 are used to install proximity switches for detecting the position of the slide 22.

[0055] The guide rail 21 is provided with a buffer seat 25 near the support frame 501. The slide 22 is provided with a buffer assembly near the buffer seat 25. The buffer assembly includes a positioning post 221 and a buffer post 222. The buffer seat 25 is provided with a positioning groove 251 corresponding to the positioning post 221 and a buffer channel 252 corresponding to the buffer post 222.

[0056] Specifically, through the sliding engagement of the guide rail 21 and the slide block 22, the cylinder 23 drives the slide block 22 to move laterally along the guide rail 21, thereby enabling the positioning mechanism 3 to accurately approach or move away from the detection mechanism, providing a suitable position and spacing for the detection of the differential housing 4, and facilitating the installation or removal of the differential housing 4.

[0057] The proximity switch bracket 24 on the workbench 1, in conjunction with the proximity switch, can accurately detect the position of the slide 22, thereby achieving precise control over the movement of the positioning mechanism 3. This ensures that the differential housing 4 can accurately reach the detection position, improving the accuracy and repeatability of the detection. Automatic detection and control of the slide position via the proximity switch reduces manual intervention, lowers safety risks caused by operational errors, and enhances the operational safety of the equipment.

[0058] The positioning groove 251 on the buffer seat 25 cooperates with the positioning post 221 on the slide 22 to limit and position the movement of the slide 22; the buffer channel 252 cooperates with the buffer post 222 to buffer when the slide 22 moves to the extreme position, preventing the slide 22 from colliding hard with the buffer seat 25, protecting the equipment from damage, reducing the maintenance frequency of the equipment, and extending the service life of the equipment.

[0059] In a preferred embodiment of this utility model, the positioning mechanism 3 includes a first positioning plate 31 and a second positioning plate 32. The first positioning plate 31 and the second positioning plate 32 are symmetrically arranged longitudinally on the slide block 22. Both the first positioning plate 31 and the second positioning plate 32 have U-shaped grooves for placing the differential housing 4. L-shaped plates 33 for limiting the differential housing 4 are respectively installed on both sides of the first positioning plate 31. The L-shaped plate 33 has a limiting groove 34 on the contact side with the differential housing 4. The shape of the limiting groove 34 corresponds to the shape of the differential housing 4.

[0060] Specifically, the two ends of the differential housing 4 are placed on positioning plate 1 31 and positioning plate 2 32 respectively. The U-shaped groove design allows the differential housing 4 to be smoothly placed and initially positioned, ensuring its stability during the testing process. The L-shaped plates 33 on both sides of positioning plate 1 31 are used to further limit the differential housing 4. The limiting grooves 34 on the L-shaped plates 33 correspond to the shape of the differential housing 4, and can closely fit the outer contour of the differential housing 4 to prevent it from moving or rotating during the testing process, ensuring the accurate testing position of the differential housing 4. The L-shaped plates 33 are bolted to positioning plate 1 31, which facilitates the replacement of limiting grooves 34 of different shapes to accommodate differential housings 4 with various outer diameters, improving the versatility and flexibility of the equipment.

[0061] In a preferred embodiment of this utility model, set screw 510 and set screw 522 are internal hexagonal flat-end set screws, and locking screw 513 is an internal hexagonal screw.

[0062] Working principle of a detection device for detecting the circular runout of differentials with different outer diameters:

[0063] The differential housing 4 is placed in the U-shaped grooves of positioning plate 31 and positioning plate 32, and the limiting groove 34 on the L-shaped plate fixes the outer contour of the differential housing 4. The cylinder 23 in the translation mechanism 2 drives the slide 22 to move laterally along the guide rail 21, so that the differential housing 4 is close to the detection mechanism.

[0064] Based on the outer diameter of the differential housing 4, select and install an adjustment block 504 of appropriate height to adjust the height of the detection plate 503. The differential housing 4 is rotated by an external mechanism, and the circular runout of the differential housing 4 is detected by a measuring sensor 506. The detection data is transmitted to a control or display device for recording and analysis. After the test is completed, the cylinder 23 drives the slide 22 to move in the opposite direction, moving the positioning mechanism 3 away from the detection mechanism, and the differential housing 4 is removed, completing one test cycle.

[0065] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A detection device suitable for detecting the circular runout of differentials with different outer diameters, characterized in that: The device includes a workbench, on which a translation mechanism is mounted. A positioning mechanism is mounted on the moving part of the translation mechanism. A differential housing is longitudinally mounted on the positioning mechanism. The moving part is used to laterally move the positioning mechanism closer to or away from the detection mechanism. The detection mechanism includes a support frame located at one end of the translation mechanism and mounted on a workbench at its bottom. A connecting plate is horizontally mounted on the top of the support frame, and a set of detection plates are symmetrically arranged on the upper and lower sides of the connecting plate. The detection ends of the two detection plates are located on the upper and lower sides of the differential housing, respectively, and each plate is equipped with a measuring sensor for detecting differential housing runout. An adjusting block for adjusting the height of the detection plate is provided between each detection plate and the connecting plate. The adjusting block, the detection plate, and the connecting plate are all slidably connected to a vertically arranged guide column.

2. The detection device for detecting the circular runout of differentials with different outer diameters according to claim 1, characterized in that: The number of the testing mechanisms is three sets, and the three sets of testing mechanisms are respectively used to measure the middle and both ends of the differential housing.

3. The detection device for detecting the circular runout of differentials with different outer diameters according to claim 1, characterized in that: The number of guide posts is two. Both the detection plate and the connecting plate are provided with two guide holes for the guide posts to pass through. Each of the two guide holes is provided with a locking part on an adjacent side. A longitudinal channel in the shape of an inverted triangle is provided between the two locking parts. A pin is placed in the longitudinal channel. A set screw is provided above the pin. A vertical screw hole for installing the set screw is provided between the two guide holes.

4. The detection device for detecting the circular runout of differentials with different outer diameters according to claim 3, characterized in that: Below the two locking parts, a cylindrical longitudinal channel 2 is provided, which is connected to the longitudinal channel 1; when the set screw 1 tightens the pin 1, the width of the cross section at the connection point is smaller than the diameter of the pin 1.

5. The detection device for detecting the circular runout of differentials with different outer diameters according to claim 1, characterized in that: The adjusting block is provided with two sliding grooves for the guide post to pass through, and a longitudinal screw hole is provided between the two sliding grooves. The longitudinal screw hole is threadedly connected to the locking screw, and a ball handle is installed at the tail of the locking screw.

6. The detection device for detecting the circular runout of differentials with different outer diameters according to claim 1, characterized in that: The support frame and the connecting plate are connected by a limiting assembly, which includes a limiting frame, limiting posts, and a limiting plate. One side of the limiting frame is connected to the side of the support frame near the translation mechanism. Two limiting posts are longitudinally installed on the top of the limiting frame, and the limiting posts are slidably connected to the connecting plate. The limiting plate is installed on the top of the support frame, and the limiting plate has slots for limiting the connecting plate. The number of slots matches the number of connecting plates.

7. The detection device for detecting the circular runout of differentials with different outer diameters according to claim 1, characterized in that: Two arc-shaped grooves are provided at the connection between the connecting plate and the limiting post for engaging with the limiting post. A locking part 2 is provided on the adjacent side of the two arc-shaped grooves. A longitudinal channel 2 in the shape of an inverted triangle is provided between the two locking parts 2. A pin 2 is installed in the longitudinal channel 2. The two inclined sides of the longitudinal channel 2 that contact the pin 2 are stepped. A set screw 2 is provided above the pin 2. The set screw 2 is threadedly connected to the connecting plate.

8. The detection device for detecting the circular runout of differentials with different outer diameters according to claim 1, characterized in that: The translation mechanism includes two guide rails arranged laterally on the worktable, which are slidably connected to a slide block. A positioning mechanism is installed on the slide block. The slide block is connected to the sliding end of a cylinder, which is mounted on the worktable. Proximity switch brackets are spaced apart on the worktable along the sliding direction of the slide block. The switch brackets are used to install proximity switches that detect the position of the slide block.

9. The detection device for detecting the circular runout of differentials with different outer diameters according to claim 8, characterized in that: The guide rail is provided with a buffer seat near the support frame end, and the slide is provided with a buffer assembly near the buffer seat side. The buffer assembly includes a positioning post and a buffer post. The buffer seat is provided with a positioning groove corresponding to the positioning post and a buffer channel corresponding to the buffer post.

10. The detection device for detecting the circular runout of differentials with different outer diameters according to claim 1, characterized in that: The positioning mechanism includes a positioning plate one and a positioning plate two symmetrically arranged on the slide. Both the positioning plate one and the positioning plate two have U-shaped grooves for placing the differential housing. L-shaped plates for limiting the differential housing are respectively installed on both sides of the positioning plate one. Limiting grooves are provided on the contact side of the L-shaped plates with the differential housing. The shape of the limiting grooves corresponds to the shape of the differential housing.

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