Detection device for differential housing of electric vehicle

Abstract

An electric automobile differential shell detection device comprises a detection platform, a rotary table is arranged on the detection platform, a magnetic attraction piece is arranged on the rotary table, at least two sets of symmetrical guide clamping units are arranged on the outer edge of the rotary table in the circumferential direction of the rotary table, each guide clamping unit comprises a base, an adjusting piece and an arc-shaped clamping plate, and the bases are arranged on the upper portion of the rotary table; the adjusting piece penetrates through the base in the radial direction of the rotating table and is rotationally connected with the arc-shaped clamping plate, and the position of the arc-shaped clamping plate on the upper end face of the rotating table is adjustable; a supporting arm is arranged on one side of the detection platform, the position of the adjusting rod is adjustable in the horizontal direction, and a lever indicator is arranged on the adjusting rod. The bearing stand of the differential shell is directly magnetically attracted to the magnetic attraction piece on the rotating table, the differential shell is pre-connected with the rotating table, the arc-shaped clamping plates of the guide clamping units on the two sides are synchronously adjusted to move towards the bearing stand on the lower portion of the differential shell, and the bearing stand is clamped; and roundness detection is carried out on the to-be-detected shaft hole through the lever indicator.

Description

Technical Field

[0001] This utility model relates to the field of differential housing detection technology, specifically to a device for detecting the differential housing of an electric vehicle. Background Technology

[0002] The differential housing is a key component of the electric vehicle's transmission system, and the machining accuracy of its shaft holes (such as bearing mounting holes and axle holes) directly affects gear meshing performance and transmission efficiency. Currently, the roundness and coaxiality of the differential housing shaft holes are typically measured using a dial indicator. The purpose of roundness testing is to ensure that the shape of the inner wall of the shaft hole is close to an ideal circle, thereby guaranteeing the performance and reliability of the differential housing during assembly and use.

[0003] Current methods for testing the roundness of differential housing shaft holes typically involve placing the differential housing directly on a testing bracket or workbench, with a gauge fixed to the bracket via a magnetic base, ensuring its testing end (probe) contacts the inner wall of the shaft hole to be tested. During testing, the differential housing must be manually rotated, and the range of the gauge pointer's movement observed to calculate the circumferential error of the shaft hole. Because the differential housing is relatively heavy and lacks a precise positioning structure, manual rotation can easily lead to offset or wobbling, resulting in inaccurate gauge readings. Utility Model Content

[0004] To address the technical problems existing in the background art, this utility model provides an electric vehicle differential housing detection device.

[0005] The technical solution of this utility model is as follows:

[0006] An electric vehicle differential housing testing device includes a testing platform with a rotating table. A magnetic suction component is provided on the rotating table, with its upper end face flush with the upper end face of the rotating table. At least two symmetrical sets of guide clamping units are provided along the circumferential direction of the outer edge of the rotating table. Each guide clamping unit includes a base, an adjusting component, and an arc-shaped clamping plate. The base is located on the upper part of the rotating table, and the arc-shaped clamping plate is located inside the base. The adjusting component passes through the base and is rotatably connected to the arc-shaped clamping plate along the radial direction of the rotating table. The position of the arc-shaped clamping plate on the upper end face of the rotating table is adjustable.

[0007] The testing platform has a support arm on one side, and an adjustment rod on the support arm. The position of the adjustment rod is adjustable along the horizontal direction, and a lever dial indicator is installed on the adjustment rod.

[0008] The differential housing is clamped on the rotary table. The shaft hole of the differential housing is set vertically, and the bottom of the differential housing is magnetically attracted to the magnetic attraction of the rotary table. The connection structure between the rotary table and the testing platform is as follows: a through hole is opened in the middle of the testing platform, and the lower part of the rotary table passes through the through hole and is rotatably connected to the through hole through a bearing. The operator can rotate the differential housing installed on it simply by rotating the rotary table, which is convenient for the testing of the lever dial indicator.

[0009] To reduce friction between the rotary table and the upper surface of the testing platform, and to facilitate the smooth rotation of the differential housing by the rotary table, multiple balls are provided on the lower surface of the rotary table along its circumferential direction. The outer surface of the balls abuts against the upper surface of the testing platform, and the rotary table slides against the upper surface of the testing platform through the balls.

[0010] Furthermore, the upper surface of the testing platform is provided with an annular groove concentric with the through hole, and the cross-section of the annular groove is an arc-shaped structure adapted to the ball bearing.

[0011] To prevent the upper surface of the bearing from being too high and affecting the rotation of the rotary table, the horizontal plane of the upper surface of the bearing is lower than the horizontal plane of the upper surface of the testing platform.

[0012] Furthermore, the adjusting component is an adjusting bolt, which is threadedly connected to the base.

[0013] To facilitate the linear movement of the arc-shaped clamping plate, it clamps the outer surface of the bearing platform at the bottom of the differential housing, thereby clamping the differential housing. The base is provided with a guide hole, the axis of which is parallel to the axis of the adjusting bolt. The outer surface of the arc-shaped clamping plate is provided with a guide rod that slides with the guide hole.

[0014] To facilitate manual rotation of the rotary table, a lever coaxial with the outer end of the guide rod extends outward.

[0015] The structure in which the adjusting rod can move horizontally is as follows: an adjusting hole is provided on the upper part of the support arm, the adjusting rod is inserted into the adjusting hole in the horizontal direction, and the adjusting rod is detachably connected to the support arm by fastening bolts.

[0016] To facilitate the movement of the arc-shaped clamping plates of the two guide clamping units by the same distance, the lower bearing platform of the differential housing is located at the center of the rotary table, and the axis of the lower bearing platform is coaxial with the axis of the rotary table. The upper end face of the rotary table and the magnetic suction component is provided with a scale bar corresponding to the arc-shaped clamping plate. The length direction of the scale bar is set along the radial direction of the rotary table and is parallel to the length direction of the adjusting component.

[0017] The beneficial effects of this utility model are as follows:

[0018] The differential housing is placed on a rotating table with the housing positioned vertically so that the shaft hole to be tested faces upward. The lower bearing platform is directly magnetically attracted to the magnetic components on the rotating table, achieving a pre-connection between the differential housing and the rotating table. Then, the arc-shaped clamping plates of the guide clamping units on both sides are moved towards the lower bearing platform of the differential housing through synchronous adjustment, which clamps the bearing platform and facilitates stable rotation of the differential housing on the rotating table. This reduces the large errors caused by the previous technology where the differential housing could only be manually rotated instead of rotating on a rotating table.

[0019] Alternatively, the two symmetrically arranged arc-shaped clamping plates can be adjusted to a position that matches the outer diameter of the bearing platform. After fixing, when placing the differential housing, the bearing platform can move downward along the channel formed by the two arc-shaped clamping plates to the upper end face of the magnetic suction component, thereby clamping the differential housing. The axis of the bearing platform is coaxial with the axis of the rotary table. Compared with the existing technology, this allows the detection end of the lever dial indicator to accurately detect the roundness of the shaft hole when the differential housing rotates.

[0020] The lever dial indicator is mounted above the testing platform via a support arm and an adjusting rod. The horizontal position of the lever dial indicator is adjustable, allowing for adaptive adjustments based on the position and size of the shaft hole to be tested. Attached Figure Description

[0021] In the attached diagram:

[0022] Figure 1 This is a structural diagram;

[0023] Figure 2 This is a top view;

[0024] Figure 3 for Figure 2 A schematic diagram of the AA-direction cross-section structure;

[0025] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0026] Figure 5 This is a schematic diagram of the rotary table and guide clamping unit structure;

[0027] Figure 6 This is a schematic diagram of the testing platform structure;

[0028] The components represented by the various reference numerals in the diagram are:

[0029] 1. Testing platform; 101. Through hole; 102. Annular groove; 2. Rotary table; 201. Upper platform; 202. Lower platform; 3. Magnetic suction component; 4. Base; 401. Guide rod; 5. Adjusting component; 6. Arc-shaped clamping plate; 7. Support arm; 8. Adjusting rod; 9. Lever dial indicator; 10. Fastening bolt; 11. Bearing; 12. Ball bearing; 13. Lever; 14. Scale bar. Detailed Implementation

[0030] See Figure 1 and Figure 2 As shown, an electric vehicle differential housing testing device includes a testing platform 1, a rotating stage 2 on the testing platform 1, and a magnetic suction component 3 on the rotating stage 2. The upper end face of the magnetic suction component 3 is flush with the upper end face of the rotating stage 2. At least two symmetrical sets of guide clamping units are provided along the circumferential direction of the outer edge of the rotating stage 2. The guide clamping unit includes a base 4, an adjusting component 5, and an arc-shaped clamping plate 6. The adjusting component 5 is an adjusting bolt, which is threadedly connected to the base 4. The base 4 is located on the upper part of the rotating stage 2, and the arc-shaped clamping plate is located inside the base 4. The adjusting component 5 passes through the base 4 along the radial direction of the rotating stage 2 and is rotatably connected to the arc-shaped clamping plate 6. The position of the arc-shaped clamping plate 6 on the upper end face of the rotating stage 2 is adjustable.

[0031] See Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, the differential housing is clamped on the rotary table 2. The shaft hole of the differential housing is vertically arranged, and the bottom of the differential housing is magnetically attracted to the magnetic suction component 3 of the rotary table 2. The connection structure between the rotary table 2 and the testing platform 1 is as follows: the testing platform 1 has a through hole 101 in the middle; the rotary table 2 includes an upper platform body 201 and a lower platform body 202 coaxial with it; the upper platform body 201 has a mounting hole for mounting the magnetic suction component 3 in the middle. The outer diameter of the upper platform body 201 is larger than the inner diameter of the through hole 101, and the upper platform body 201 is located above the through hole 101. The lower platform body 202 passes through the through hole 101 and is rotatably connected to the through hole 101 through a bearing 11. The operator can rotate the differential housing mounted on it simply by rotating the rotary table 2, which facilitates the testing of the lever dial indicator 9. To prevent the upper surface of bearing 11 from being too high and affecting the rotation of rotary table 2, the horizontal plane of the upper surface of bearing 11 is lower than the horizontal plane of the upper surface of detection platform 1.

[0032] See Figure 4As shown, to reduce the friction between the rotary table 2 and the upper surface of the testing platform 1, and to facilitate the smooth rotation of the differential housing by the rotary table 2, a plurality of balls 12 are provided on the lower surface of the rotary table 2 along its circumferential direction. The outer surface of the balls 12 abuts against the upper surface of the testing platform 1, and the rotary table 2 slides against the upper surface of the testing platform 1 through the balls 12. The upper surface of the testing platform 1 is provided with an annular groove 102 concentric with the through hole 101. The cross-section of the annular groove 102 is an arc-shaped structure adapted to the balls 12. The balls 12 slide within the annular groove 102, serving as a guide for the balls 12.

[0033] To facilitate the linear movement of the arc-shaped clamping plate 6, which clamps the outer surface of the bearing platform at the bottom of the differential housing, and thus clamps the differential housing, the base 4 has a guide hole. The axis of the guide hole is parallel to the axis of the adjusting bolt. The outer surface of the arc-shaped clamping plate is provided with a guide rod 401 that slides with the guide hole. To facilitate manual rotation of the rotary table 2, a lever 13 coaxially extends outward from the outer end of the guide rod 401.

[0034] See Figure 6 As shown, a support arm 7 is provided on one side of the testing platform 1, and an adjusting rod 8 is provided on the support arm 7. The position of the adjusting rod 8 is adjustable in the horizontal direction. A lever dial indicator 9 for detecting the roundness of the shaft hole to be tested is provided on the adjusting rod 8. The lever dial indicator 9 is existing technology.

[0035] The structure that allows the adjusting rod 8 to move horizontally is as follows: an adjusting hole is provided on the upper part of the support arm 7, the adjusting rod 8 is inserted into the adjusting hole in the horizontal direction, and the adjusting rod 8 is detachably connected to the support arm 7 by fastening bolt 10. By adjusting the horizontal position of the adjusting rod 8 in the adjusting hole, the position of the lever dial indicator 9 can be adjusted.

[0036] To facilitate the movement of the arc-shaped clamping plates 6 of the two guide clamping units by the same distance, the lower bearing platform of the differential housing is located at the center of the rotary table 2, and the axis of the lower bearing platform is coaxial with the axis of the rotary table 2. The upper end face of the rotary table 2 and the magnetic suction component 3 is provided with scale strips corresponding to the arc-shaped clamping plates. The length direction of the scale strips is set along the radial direction of the rotary table 2 and is parallel to the length direction of the adjusting component 5. The scale strip 14 is a scale line.

Claims

1. An electric vehicle differential housing inspection apparatus, characterized by, The system includes a testing platform (1), on which a rotating table (2) is provided. A magnetic suction component (3) is provided on the rotating table (2). The upper end face of the magnetic suction component (3) is flush with the upper end face of the rotating table (2). At least two sets of symmetrical guide clamping units are provided on the outer edge of the rotating table (2) along its circumferential direction. The guide clamping unit includes a base (4), an adjusting component (5), and an arc-shaped clamping plate (6). The base (4) is located on the upper part of the rotating table (2). The arc-shaped clamping plate is located inside the base (4). The adjusting component (5) passes through the base (4) along the radial direction of the rotating table (2) and is rotatably connected to the arc-shaped clamping plate (6). The position of the arc-shaped clamping plate (6) on the upper end face of the rotating table (2) is adjustable. The detection platform (1) has a support arm (7) on one side, and an adjustment rod (8) is provided on the support arm (7). The position of the adjustment rod (8) is adjustable in the horizontal direction, and a lever dial indicator (9) is provided on the adjustment rod (8).

2. The electric vehicle differential housing detection device of claim 1, wherein, The detection platform (1) has a through hole (101) in the middle, and the lower part of the rotating table (2) passes through the through hole (101) and is rotatably connected to the through hole (101) through a bearing (11).

3. The electric vehicle differential housing detection device of claim 2, wherein, The lower surface of the rotary table (2) is provided with a plurality of balls (12) along its circumferential direction, and the outer surface of the balls (12) abuts against the upper surface of the detection platform (1).

4. The electric vehicle differential housing detection device of claim 3, wherein, The upper surface of the detection platform (1) is provided with an annular groove (102) with the same center as the through hole (101), and the cross section of the annular groove (102) is an arc-shaped structure adapted to the ball (12).

5. The electric vehicle differential housing detection device of claim 2, wherein, The horizontal plane of the upper end face of the bearing (11) is lower than the horizontal plane of the upper end face of the detection platform (1).

6. The electric vehicle differential housing detection device of claim 1, wherein, The adjusting component (5) is an adjusting bolt, which is threadedly connected to the base (4).

7. The electric vehicle differential housing detection device of claim 1, wherein, The base (4) has a guide hole, the axis of which is parallel to the axis of the adjusting bolt, and the outer surface of the arc-shaped support plate is provided with a guide rod (401) that slides with the guide hole.

8. The electric vehicle differential housing detection device of claim 7, wherein, The outer end of the guide rod (401) extends outward with a lever (13) coaxial with it.

9. The electric vehicle differential housing detection device of claim 1, wherein, The upper part of the support arm (7) is provided with an adjustment hole, and the adjustment rod (8) is inserted into the adjustment hole in a horizontal direction. The adjustment rod (8) is detachably connected to the support arm (7) by a fastening bolt (10).

10. The electric vehicle differential housing detection device of claim 1, wherein, The upper surfaces of the rotary table (2) and the magnetic suction member (3) are provided with scale strips (14) corresponding to the arc-shaped support plate. The length direction of the scale strips (14) is set along the radial direction of the rotary table (2) and is parallel to the length direction of the adjustment member (5).

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