A differential case detection fixture

Abstract

A differential housing detection clamp, including detection platform, detection platform is provided with two groups of angle adjusting units along its length direction, angle adjusting unit includes adjusting cylinder which is arranged along vertical direction, the cross section in adjusting cylinder is noncircular, adjusting cylinder is equipped with adjusting rod, the height position of adjusting rod is adjustable, the upper portion of adjusting rod is equipped with arc-shaped support frame which supports differential housing one side shaft hole table, the two arc-shaped support frames of two angle adjusting units support differential housing two sides shaft hole table respectively, the outer side of arc-shaped support frame of one angle adjusting unit is equipped with axial direction jacking assembly, adjusting piece is connected with arc-shaped support frame by screw thread, the utility model discloses a differential housing two sides shaft hole table is supported through angle adjusting unit respectively, and angle adjusting unit can play the supporting effect to corresponding shaft hole table, is convenient for in suitable position through the measuring needle of roughness measuring instrument to differential housing chamfer, distance, radius and roughness lamp carry out measurement.

Description

Technical Field

[0001] This utility model relates to the field of differential housing testing technology, specifically a differential housing testing fixture. Background Technology

[0002] The differential is an important component in automotive systems. The structure of its housing directly affects the normal operation of the differential. The differential housing needs to be measured for chamfers, distances, radii, and roughness.

[0003] Existing technology generally uses a roughness measuring instrument to measure the differential housing. During the measurement, the differential needs to be placed on a support frame for support. Then, the position of the differential housing is adjusted to correspond with the measuring needle of the roughness measuring instrument. The chamfer, distance, radius and roughness of the differential housing are measured by the measuring needle.

[0004] However, the existing support frame only serves to support the differential housing. The support frame can only adjust the height of the two ends of the differential housing, but cannot clamp the differential housing. When measuring data of the differential, the differential housing may move, affecting the measurement operation of the probe. Moreover, different support frames need to be replaced for different sizes of differentials, which increases the cost of use. Utility Model Content

[0005] To address the technical problems existing in the background art, this utility model provides a differential housing testing fixture.

[0006] The technical solution of this utility model is as follows:

[0007] A differential housing testing fixture includes a testing platform. Two sets of angle adjustment units are arranged along the length of the testing platform. Each angle adjustment unit includes an adjustment cylinder arranged vertically. The cross-section of the adjustment cylinder is non-circular. An adjustment rod adapted to the adjustment cylinder is slidably connected in the vertical direction inside the adjustment cylinder. The height of the adjustment rod is adjustable. An arc-shaped support frame supporting the shaft hole platform on one side of the differential housing is provided on the upper part of the adjustment rod. The two arc-shaped support frames of the two angle adjustment units respectively support the shaft hole platforms on both sides of the differential housing.

[0008] An axial clamping assembly is provided on the outer side of the arc-shaped support frame of an angle adjustment unit. The axial clamping assembly includes an adjusting member that passes through the arc-shaped support frame. The adjusting member is threadedly connected to the arc-shaped support frame, and one end of the adjusting member can pass through the arc-shaped support frame and clamp to the outer surface of the differential housing supported thereon.

[0009] The specific structure of the adjustable rod height is as follows: an adjusting screw is provided on the vertical direction of the detection platform, the lower part of the adjusting screw is rotatably connected to the detection platform, and the upper part of the adjusting screw is threadedly connected to the adjusting rod.

[0010] The connection structure between the adjusting screw and the testing platform is such that the lower part of the adjusting screw is rotatably connected to the testing platform via a bearing.

[0011] Furthermore, the lower part of the adjusting rod has a downward through-hole along its length, the through-hole including a threaded hole, and the adjusting screw is threadedly connected to the threaded hole.

[0012] The adjusting rod and the adjusting screw are threaded together. The adjusting rod has an internal thread in the connecting hole and an external thread on the outer surface of the adjusting screw. Due to long-term wear, there is a small gap when the external thread and the internal thread are connected, which may cause the adjusting rod and the differential housing on it to wobble. The connecting hole also includes a mounting hole that is coaxial with and communicates with the threaded hole. The mounting hole is located above the threaded hole and has an elastic element inside. The lower end of the elastic element abuts against the upper end face of the adjusting screw. The elastic element pushes the adjusting rod downward to reduce its wobble.

[0013] Furthermore, the elastic element is a compression spring.

[0014] Preferably, the inner diameter of the mounting hole is larger than the maximum inner diameter of the threaded hole.

[0015] To facilitate better contact between the lower end of the elastic element and the adjusting screw, increase the contact area, and facilitate stable downward pressure of the adjusting rod by the elastic element, a support plate is provided on the upper end face of the adjusting screw. The maximum length of the support plate is greater than the maximum outer diameter of the elastic element and smaller than the inner diameter of the mounting hole.

[0016] The adjustment screw is adjusted by placing the lower end of the screw below the upper platform of the testing platform. An adjustment nut is located at the lower end of the screw, and a handle is positioned above the nut. The handle allows manual adjustment of the screw by the operator, enabling coarse adjustment. The adjustment nut can be adjusted using a special tool to change the number of rotations or the angle of the screw, ensuring the differential housing remains horizontal or is adjusted to a preset position, facilitating measurement by the roughness measuring instrument's probe.

[0017] To facilitate adjustment of the rotating handle and adjusting nut, an arc-shaped adjusting hole is provided on the side of the upper platform near the adjusting nut.

[0018] The beneficial effects of this utility model are as follows:

[0019] The shaft hole platforms on both sides of the differential housing are supported by angle adjustment units. The angle adjustment units can not only support the corresponding shaft hole platforms, but also adjust the height of the shaft hole platforms, so that the chamfer, distance, radius and roughness of the differential housing can be measured by the probe of the roughness measuring instrument at a suitable position.

[0020] An axial clamping component is also provided on the arc-shaped support frame of one angle adjustment unit. By adjusting the adjusting part of the axial clamping component, the differential housing can be clamped towards the arc-shaped support frame of another angle adjustment unit, which plays a clamping role on the differential housing. This facilitates the movement or rotation of the differential housing during measurement and can also clamp differential housings of different sizes.

[0021] The adjusting rod is threadedly connected to the adjusting screw. The adjusting rod has an internal thread in its connecting hole and an external thread on its outer surface. Due to long-term wear, there is a small gap when the external thread and the internal thread are connected, which may cause the adjusting rod and the differential housing on it to wobble. To address this, the elastic element can press down and tighten the adjusting rod to improve the stability of the adjusting rod's movement within the adjusting cylinder and reduce the wobble. Attached Figure Description

[0022] In the attached diagram:

[0023] Figure 1 This is a structural diagram;

[0024] Figure 2 Right view;

[0025] Figure 3 This is a front view;

[0026] Figure 4 This is a top view;

[0027] Figure 5 for Figure 4 A schematic diagram of the AA-direction cross-section structure;

[0028] Figure 6 A partial cross-sectional view of the angle adjustment unit;

[0029] The components represented by the various reference numerals in the diagram are:

[0030] 1. Testing platform; 101. Upper platform; 1011. Arc-shaped adjustment hole; 2. Angle adjustment unit; 201. Adjusting cylinder; 202. Adjusting rod; 2021. Threaded hole; 2022. Mounting hole; 203. Arc-shaped support frame; 3. Axial clamping assembly; 301. Adjusting component; 302. Clamping plate; 4. Adjusting screw; 5. Bearing; 6. Elastic component; 7. Support plate; 8. Adjusting nut; 9. Rotating handle; 10. Differential housing; 1001. Shaft hole platform. Detailed Implementation

[0031] See Figure 1 , Figure 2 , Figure 3 and Figure 6As shown, a differential housing testing fixture includes a testing platform 1. Two sets of angle adjustment units 2 are arranged along the length of the testing platform 1. The angle adjustment unit 2 includes an adjustment cylinder 201 arranged vertically. The cross-section of the adjustment cylinder 201 is non-circular. An adjustment rod 202 adapted to the adjustment cylinder 201 is slidably connected in the vertical direction inside the adjustment cylinder 201. The height of the adjustment rod 202 is adjustable. An arc-shaped support frame 203 is provided on the upper part of the adjustment rod 202 to support the shaft hole platform 1001 on one side of the differential housing 10. The two arc-shaped support frames 203 of the two angle adjustment units 2 respectively support the shaft hole platforms 1001 on both sides of the differential housing 10.

[0032] An axial clamping assembly 3 is provided on the outer side of the arc-shaped support frame 203 of an angle adjustment unit 2. The axial clamping assembly 3 includes an adjusting member 301 that passes through the arc-shaped support frame 203. The adjusting member 301 is threadedly connected to the arc-shaped support frame 203, and one end of the adjusting member 301 can pass through the arc-shaped support frame 203 and clamp to the outer surface of the differential housing 10 supported thereon. The adjusting member 301 is a fastening bolt. An arc-shaped clamping plate 302 is rotatably provided at one end of the adjusting member 301 that passes through the arc-shaped support frame 203. The clamping plate 302 can be adapted to the outer surface of the differential housing 10 to be contacted, increasing the contact area with the differential housing 10.

[0033] See Figure 4 and Figure 5 As shown, the adjustable height of the adjusting rod 202 is specifically structured as follows: an adjusting screw 4 is provided on the detection platform 1 along the vertical direction; the lower part of the adjusting screw 4 is rotatably connected to the detection platform 1, and the upper part of the adjusting screw 4 is threadedly connected to the adjusting rod 202. The connection structure between the adjusting screw 4 and the detection platform 1 is as follows: the lower part of the adjusting screw 4 is rotatably connected to the detection platform 1 through a bearing 5. The testing platform 1 includes an upper platform 101, on which two bearing holes 5 corresponding to the adjusting cylinder 201 are opened. The bearings 5 ​​are installed in the bearing holes 5, and the outer ring of the bearings 5 ​​is connected to the inner wall of the bearing holes 5. The inner ring of the bearings 5 ​​is connected to the lower outer surface of the adjusting screw 4. The adjusting screw 4 passes through the bearings 5 ​​and is fixedly connected to them, so that when the adjusting screw 4 rotates, the height position of the adjusting screw 4 is not inconvenient. The rotation of the adjusting screw 4 will drive the adjusting rod 202 to move up or down, thereby adjusting the height position of the adjusting rod 202, and thus adjusting the height position of the shaft hole platform 1001 on both sides of the differential housing 10. The differential housing 10 can be placed horizontally or clamped at an angle, which is convenient for the use of the roughness measuring instrument.

[0034] The lower part of the adjusting rod 202 has a downward through-hole along its length. The through-hole includes a threaded hole 2021, and the adjusting screw 4 is threadedly connected to the threaded hole 2021.

[0035] The adjusting rod 202 is threadedly connected to the adjusting screw 4. The adjusting rod 202 has an internal thread in its connecting hole, while the adjusting screw 4 has an external thread on its outer surface. Due to long-term wear and tear, a small gap may form between the external and internal threads, potentially causing wobbling in the adjusting rod 202 and the differential housing 10. The connecting hole also includes a mounting hole 2022, coaxial with and communicating with the threaded hole 2021. The inner diameter of the mounting hole 2022 is larger than the maximum inner diameter of the threaded hole 2021. The mounting hole 2022 is located above the threaded hole 2021 and contains an elastic element 6, which is a compression spring. The lower end of the elastic element 6 abuts against the upper end face of the adjusting screw 4, thus pressing the adjusting rod 202 downwards and reducing wobbling.

[0036] To facilitate better contact between the lower end of the elastic element 6 and the adjusting screw 4, increase the contact area, and facilitate the elastic element 6 to stably press down the adjusting rod 202, a support plate 7 is provided on the upper end face of the adjusting screw 4. The maximum length of the support plate 7 is greater than the maximum outer diameter of the elastic element 6 and less than the inner diameter of the mounting hole 2022.

[0037] See Figure 3 As shown, the adjustment method of the adjusting screw 4 is as follows: the lower end of the adjusting screw 4 is located below the upper platform 101 of the testing platform 1. An adjusting nut 8 is provided at the lower end of the adjusting screw 4, and a rotating handle 9 is provided above the adjusting nut 8. The rotating handle 9 allows the operator to manually rotate and adjust the adjusting screw 4 for coarse adjustment. The adjusting nut 8 can be used with a special tool to adjust the number of rotations or the angle of the adjusting screw 4, so that the differential housing 10 can remain horizontal or be adjusted to a preset position, facilitating the measurement by the probe of the roughness measuring instrument. To facilitate the adjustment of the rotating handle 9 and the adjusting nut 8, an arc-shaped adjusting hole 1011 is provided on the side of the upper platform 101 near the adjusting nut 8.

Claims

1. A differential housing testing fixture, characterized in that, The system includes a testing platform (1), on which two sets of angle adjustment units (2) are arranged along its length. The angle adjustment unit (2) includes an adjustment cylinder (201) arranged in the vertical direction. The cross-section inside the adjustment cylinder (201) is non-circular. An adjustment rod (202) adapted to it is slidably connected in the vertical direction inside the adjustment cylinder (201). The height position of the adjustment rod (202) is adjustable. An arc-shaped support frame (203) supporting the shaft hole platform (1001) on one side of the differential housing (10) is provided on the upper part of the adjustment rod (202). The two arc-shaped support frames (203) of the two angle adjustment units (2) respectively support the shaft hole platforms (1001) on both sides of the differential housing (10). An axial clamping assembly (3) is provided on the outer side of the arc-shaped support frame (203) of one of the angle adjustment units (2). The axial clamping assembly (3) includes an adjusting member (301) that passes through the arc-shaped support frame (203). The adjusting member (301) is threadedly connected to the arc-shaped support frame (203), and one end of the adjusting member (301) can pass through the arc-shaped support frame (203) and clamp to the outer surface of the differential housing (10) supported thereon.

2. The differential housing testing fixture according to claim 1, characterized in that, The detection platform (1) is provided with an adjusting screw (4) along the vertical direction. The lower part of the adjusting screw (4) is rotatably connected to the detection platform (1), and the upper part of the adjusting screw (4) is threadedly connected to the adjusting rod (202).

3. A differential housing testing fixture according to claim 2, characterized in that, The lower part of the adjusting screw (4) is rotatably connected to the detection platform (1) via a bearing (5).

4. A differential housing testing fixture according to claim 1, characterized in that, The lower part of the adjusting rod (202) has a downward through-hole along its length. The connecting hole includes a threaded hole (2021), and the adjusting screw (4) is threadedly connected to the threaded hole (2021).

5. A differential housing testing fixture according to claim 4, characterized in that, The connecting hole also includes a mounting hole (2022) that is coaxial with and connected to the threaded hole (2021). The mounting hole (2022) is located above the threaded hole (2021). An elastic element (6) is provided in the mounting hole (2022), and the lower end of the elastic element (6) abuts against the upper end face of the adjusting screw (4).

6. A differential housing testing fixture according to claim 5, characterized in that, The elastic element (6) is a compression spring.

7. A differential housing testing fixture according to claim 5, characterized in that, The inner diameter of the mounting hole (2022) is greater than the maximum inner diameter of the threaded hole (2021).

8. A differential housing testing fixture according to claim 6, characterized in that, The upper end face of the adjusting screw (4) is provided with a support plate (7). The maximum length of the support plate (7) is greater than the maximum outer diameter of the elastic element (6) and less than the inner diameter of the mounting hole (2022).

9. A differential housing testing fixture according to claim 8, characterized in that, The lower end of the adjusting screw (4) is located below the upper platform (101) of the detection platform (1). The lower end of the adjusting screw (4) is provided with an adjusting nut (8), and a rotating handle (9) is provided above the adjusting nut (8).

10. A differential housing testing fixture according to claim 9, characterized in that, The upper platform (101) is provided with an arc-shaped adjustment hole (1011) on the side near the adjustment nut (8).

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