Differential outer circle run-out measuring platform

Abstract

The utility model provides a differential outer circle run-out measuring platform which 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 detection mechanism is used for measuring the run-out condition of the outer circle of a differential shell. The positioning mechanism comprises an adjusting seat, a sliding rail is arranged on the adjusting seat, two sliding blocks are installed on the sliding rail in a sliding mode, a first positioning plate and a second positioning plate are installed on the two sliding blocks respectively, rotating shafts are rotatably installed on the inner sides of the first positioning plate and the second positioning plate respectively, and the two rotating shafts are used for being inserted into the two ends of the differential shell respectively. When the differential mechanism outer circle run-out measuring platform is used for clamping a differential mechanism shell, the conical ends of the two rotating shafts can abut against the differential mechanism shell only by rotating the screw rod to move the second positioning plate, meanwhile, the distance between the two positioning plates can be adjusted according to the sizes and shapes of different differential mechanism shells, the clamping process is greatly simplified, and the working efficiency is improved. The detection efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of differential housing detection technology, and in particular relates to a differential outer circle runout measurement platform. Background Technology

[0002] In the fields of machining and quality inspection, accurate measurement of the outer diameter runout of the differential housing is crucial for ensuring the performance and service life of the differential. However, existing differential housing runout measuring equipment has many shortcomings in clamping and positioning, which seriously affects measurement efficiency and accuracy.

[0003] The clamping process for traditional measuring equipment is often cumbersome. For example, many devices use manual clamping, requiring operators to use bolts, nuts, and other tools to fix the differential housing to the measuring platform. This manual clamping method is not only time-consuming and labor-intensive, but also requires a high level of skill from the operator. If the clamping force is uneven or the clamping position is inaccurate, the differential housing may shift or deform during the measurement process, thus affecting the accuracy of the measurement results.

[0004] Secondly, the positioning accuracy of existing equipment is difficult to guarantee. Some measurement platforms use simple fixed positioning structures, which cannot be flexibly adjusted according to different sizes of differential housings. This requires frequent replacement of positioning devices or complex adjustment operations when measuring differential housings of different sizes, greatly reducing inspection efficiency. In addition, this fixed positioning structure makes it difficult to achieve rapid centering during clamping, further increasing clamping time. Utility Model Content

[0005] To address the problems existing in the prior art, this utility model aims to propose a differential outer diameter runout measurement platform. This measurement platform solves the problems of cumbersome clamping process, inability to flexibly adjust according to different specifications of differential housings, and inability to quickly center the differential.

[0006] To achieve the above objectives, the technical solution of this utility model is implemented as follows:

[0007] A differential outer circle runout measurement platform includes a worktable, a translation mechanism mounted on the worktable, a positioning mechanism mounted on the moving part of the translation mechanism, the translation mechanism being used to laterally move the positioning mechanism closer to or away from a detection mechanism, the detection mechanism being located at one end of the translation mechanism and being used to measure the runout of the outer circle of the differential housing;

[0008] The positioning mechanism includes an adjustment seat mounted on the moving part. The adjustment seat has a longitudinally arranged slide rail. Two sliders are slidably mounted on the slide rail. Positioning plate one and positioning plate two are respectively mounted on the two sliders. Rotating shafts are rotatably mounted on the inner sides of positioning plate one and positioning plate two. The rotating shaft on one side of the positioning plate is connected to the output shaft of the motor. The two rotating shafts are respectively used to insert into both ends of the differential housing, and the end of the rotating shaft inserted into the differential housing is tapered.

[0009] Furthermore, the positioning mechanism also includes a fixing plate and a screw. The fixing plate is located outside the second positioning plate and is mounted on the adjusting seat. The head of the screw is located outside the fixing plate, and the tail passes through the fixing plate and is connected to the second positioning plate. The fixing plate and the screw are threadedly connected.

[0010] 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 an adjustment seat 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.

[0011] 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.

[0012] 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.

[0013] Furthermore, the detection mechanism includes a support frame located at one end of the translation mechanism and with its bottom mounted on a workbench; 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 respectively located on the upper and lower sides of the differential housing, and measuring sensors for detecting differential housing runout are respectively installed on them; an adjusting block for adjusting the height of the detection plate is provided between each detection plate and the connecting plate, and the adjusting block, detection plate, and connecting plate are all slidably connected to a vertically arranged guide column.

[0014] 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.

[0015] 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.

[0016] Furthermore, the adjusting block is provided with two grooves for the guide post to pass through, and a longitudinal screw hole is provided between the two 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.

[0017] 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.

[0018] 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.

[0019] Compared with existing technologies, the differential outer circle runout measurement platform of this utility model has the following advantages:

[0020] (1) The differential outer circle runout measuring platform of this utility model is provided with an adjusting seat with a slide rail, and two sliders with positioning plate one and positioning plate two are slidably installed on the slide rail. The inner sides of positioning plate one and positioning plate two are rotatably installed with conical rotating shafts that can cooperate with both ends of the differential housing. This structural design allows the positioning plate two to be moved by rotating the screw when clamping the differential housing, so that the conical ends of the two rotating shafts can be pressed against the differential housing. At the same time, the distance between the two positioning plates can be flexibly adjusted according to the size and shape of different differential housings, which greatly simplifies the clamping process, reduces the dependence on the operator's technical level, significantly shortens the clamping time, and improves the testing efficiency.

[0021] (2) The differential outer diameter runout measuring platform of this utility model has an adjustable block in the detection mechanism that can be replaced according to the actual height of the differential housing and the detection requirements to adapt to differential housings of different outer diameters or heights. Meanwhile, the sliding connection and locking design between the guide post and the detection plate, adjusting block, and connecting plate facilitates the up-and-down movement of the detection plate, allowing for locking and fixing after finding a suitable detection position. This structure not only facilitates adjustment of the detection position but also enables quick matching of the detection height according to different specifications of differential housings, ensuring that the detection plate can accurately contact the housing for detection, further improving the flexibility and versatility of the equipment. Attached Figure Description

[0022] 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:

[0023] Figure 1 A schematic diagram of the overall structure provided for an embodiment of this utility model;

[0024] Figure 2 A schematic diagram of the positioning mechanism provided in an embodiment of this utility model;

[0025] Figure 3 A rear view of the overall structure provided for an embodiment of this utility model;

[0026] Figure 4 for Figure 3 Enlarged view of part B in the middle;

[0027] Figure 5 for Figure 1 Enlarged view of part A in the middle;

[0028] Figure 6 This is a schematic diagram of the detection plate structure provided in an embodiment of the present utility model;

[0029] Figure 7 A schematic diagram of the connecting plate structure provided in an embodiment of this utility model;

[0030] Figure 8 for Figure 3 Enlarged view of part C;

[0031] Figure 9 A side view of the overall structure provided for an embodiment of this utility model.

[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. Adjusting seat; 34. Slide rail; 35. Slider; 36. Rotating shaft; 37. Motor; 38. Fixing plate; 39. Screw; 4. Differential housing;

[0034] 5. Detection mechanism; 501. Support frame; 502. Connecting plate; 503. Detection plate; 504. Adjusting block; 505. Guide column; 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 column; 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 of the present invention 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 9 As shown, a differential outer circle runout measurement platform includes a worktable 1, a translation mechanism 2 is installed on the worktable 1, a positioning mechanism 3 is installed on the moving part of the translation mechanism 2, the translation mechanism 2 is used to move the positioning mechanism 3 laterally closer to or away from the detection mechanism 5, the detection mechanism 5 is located at one end of the translation mechanism 2, and is used to measure the runout of the outer circle of the differential housing 4.

[0040] The positioning mechanism 3 includes an adjustment seat 33 mounted on the moving part. The adjustment seat 33 is provided with a slide rail 34 in the longitudinal direction. Two sliders 35 are slidably mounted on the slide rail 34. Positioning plate 1 31 and positioning plate 2 32 are respectively mounted on the two sliders 35. Rotating shafts 36 are rotatably mounted on the inner side of positioning plate 1 31 and positioning plate 2 32. The rotating shaft 36 on the side of positioning plate 1 31 is connected to the output shaft of motor 37. The two rotating shafts 36 are respectively used to insert into both ends of differential housing 4, and the end of the rotating shaft 36 inserted into differential housing 4 is tapered.

[0041] In a preferred embodiment of the present invention, the positioning mechanism 3 further includes a fixing plate 38 and a screw 39. The fixing plate 38 is located outside the positioning plate 32 and is mounted on the adjusting seat 33. The head of the screw 39 is located outside the fixing plate 38, and the tail passes through the fixing plate 38 and is connected to the positioning plate 32. The fixing plate 38 and the screw 39 are threadedly connected.

[0042] Specifically, motor 37 is mounted on slider 35 corresponding to positioning plate 31 via mounting plate. Slider 35 is locked to slide rail 34 with bolts. Rotary shaft 36 is connected to positioning plate 31 and positioning plate 32 via bearings. The two rotating shafts 36 are inserted into both ends of differential housing 4. Positioning plate 32 is moved by rotating screw 39, so that the conical ends of the two rotating shafts 36 press against differential housing 4. The output shaft of motor 37 rotates, driving the rotating shaft 36 on the side of positioning plate 31 to rotate. Through friction, the rotating shaft 36 on the side of differential housing 4 and positioning plate 32 rotates, thereby performing a runout test on differential housing 4.

[0043] 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 an adjustment seat 33 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.

[0044] 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.

[0045] 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.

[0046] 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 to achieve multi-point measurement and obtain the runout of the differential housing more comprehensively.

[0047] The detection mechanism 5 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 workbench 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.

[0048] 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 to achieve multi-point measurement and obtain the runout of the differential housing more comprehensively.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] 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.

[0064] Working principle of a differential outer diameter runout measurement platform:

[0065] Two rotating shafts 36 are inserted into both ends of the differential housing 4, respectively. The positioning plate 32 is moved by rotating the screw 39, so that the conical ends of the two rotating shafts 36 are pressed against 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.

[0066] 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 output shaft of the motor 37 rotates, driving the rotating shaft 36 on the side of the positioning plate 31 to rotate. Through friction, the rotating shaft 36 on the side of the differential housing 4 and the positioning plate 32 rotates. The circular runout of the differential housing 4 is detected by the measuring sensor 506, and the detection data is transmitted to the 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.

[0067] 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 differential outer diameter runout measurement platform, 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. The translation mechanism is used to move the positioning mechanism laterally closer to or further away from the detection mechanism. The detection mechanism is located at one end of the translation mechanism and is used to measure the runout of the outer circle of the differential housing. The positioning mechanism includes an adjustment seat mounted on the moving part. The adjustment seat has a longitudinally arranged slide rail. Two sliders are slidably mounted on the slide rail. Positioning plate one and positioning plate two are respectively mounted on the two sliders. Rotary shafts are rotatably mounted on the inner sides of positioning plate one and positioning plate two. The two rotating shafts are respectively used to insert into both ends of the differential housing. The end of the rotating shaft inserted into the differential housing is tapered. The rotating shaft located on one side of the positioning plate is connected to the output shaft of the motor.

2. The differential outer diameter runout measurement platform according to claim 1, characterized in that: The positioning mechanism further includes a fixing plate and a screw. The fixing plate is located outside the second positioning plate and is mounted on the adjusting seat. The head of the screw is located outside the fixing plate, and the tail passes through the fixing plate and is connected to the second positioning plate. The fixing plate and the screw are threadedly connected.

3. The differential outer diameter runout measurement platform 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. An adjustment seat is installed on the slide block. The slide block is connected to the sliding end of a cylinder, which is installed on the worktable. Proximity switch brackets are arranged at intervals along the sliding direction of the slide block on the worktable. The switch brackets are used to install proximity switches that detect the position of the slide block.

4. The differential outer diameter runout measurement platform according to claim 3, 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.

5. The differential outer diameter runout measurement platform according to claim 1, characterized in that: The number of detection mechanisms is three sets. Each detection mechanism includes a support frame located at one end of the translation mechanism and its bottom mounted on a workbench. A connecting plate is horizontally mounted on the top of the support frame, and a set of detection plates is 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 is equipped with a measuring sensor for detecting differential housing runout. An adjusting block for adjusting the height of each detection plate is provided between each detection plate and the connecting plate. The adjusting block, detection plate, and connecting plate are all slidably connected to a vertically arranged guide column.

6. The differential outer diameter runout measuring platform according to claim 5, 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.

7. The differential outer diameter runout measuring platform according to claim 6, 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.

8. The differential outer diameter runout measuring platform according to claim 5, 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.

9. The differential outer diameter runout measurement platform according to claim 5, 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.

10. The differential outer diameter runout measuring platform according to claim 9, 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.

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