DOJ ball cage grading testing fixture

Abstract

The utility model discloses a DOJ ball cage grading testing fixture, and belongs to the technical field of constant velocity universal joints. The device comprises a base, a sliding block, a first spring, a dial indicator, a tray, a guide column and a guide sleeve. The inner wall of the ball cage abuts against the steel balls at the same time, meanwhile, the end face of the ball cage abuts against the upper surface of the tray, then the ball cage is pressed downwards, the guide sleeve and the guide column can guide the movement path of the tray so that the ball cage can move linearly, and the ball cage can apply force to the steel balls in the process that the ball cage is pressed downwards; the steel ball can extrude the spherical surface to enable the sliding block to slide in the base, and a worker can observe the detection reading of the dial indicator and record the minimum detection reading of the dial indicator.

Description

Technical Field

[0001] The present application relates to the technical field of constant velocity universal joints, and in particular to a DOJ ball cage grading inspection fixture. Background Art

[0002] DOJ joint type ball cage is a joint type with excellent performance among the components of automobile mobile constant velocity external joints, and is widely used in constant velocity universal joints. DOJ mobile joints have high requirements in the assembly process. Due to the errors in the forging process and the inconsistency of the shrinkage amount during the heat treatment of the inner cavity, there will be certain differences in the size of the inner cavity. Therefore, after the ball cage is processed, it is necessary to use the DOJ grading fixture to grade the inner cavity, so as to select different gear inner star wheels that match the gear for assembly, so as to ensure its stability and smoothness in the operation of the car.

[0003] A new type of DOJ ball cage grading inspection tool is disclosed in the patent with announcement number CN204461298U. When using this inspection tool, you need to hold the ball cage and then put the ball cage on six small steel balls. The small steel balls will squeeze the large steel balls to move down. The large steel balls will move down and drive the top rod to move down to rotate the connecting piece. The rotation of the connecting piece will squeeze the measuring axis of the micrometer. The worker can record the minimum value measured by the micrometer. Multiple ball cages are tested in this way, and then the worker can classify the ball cages according to the recorded data. In this device, when the person presses down the ball cage, there will be an error in the verticality of the ball cage axis and the ground, which will lead to inaccurate final classification results. Utility Model Content

[0004] The purpose of this application is to address the above-mentioned problems existing in the prior art and to propose a DOJ ball cage grading inspection fixture.

[0005] The present application can be implemented through the following technical solutions: A DOJ ball cage grading inspection tool, including a base, a slider, a spring, a micrometer, a tray, a guide post and a guide sleeve. The base is embedded with a plurality of steel balls, which can be exposed from the base, and can contact the same ball cage; the slider is formed with a spherical surface, the slider is located in the base, a slide groove is provided in the base, the length direction of the slide groove is perpendicular to the ground, and the ball cage can apply force to the spherical surface through the steel ball so that the slider slides in the slide groove; the spring is located in the base and can force the spherical surface to keep in contact with the plurality of steel balls; the micrometer can be detachably mounted on the base, and the micrometer is used to detect the displacement of the slider; the upper surface of the tray is used to contact the end face of the ball cage; the guide post is mounted on the base, and the guide post is provided in plurality and all are penetrated through the tray, and the plurality of guide posts are vertically arranged; the guide sleeve is mounted on the tray and slidably connected with the guide post, so that the tray can move linearly along the length direction of the guide post.

[0006] In the above technical solution, the inner wall of the ball cage is simultaneously abutted against several steel balls, and the end face of the ball cage is abutted against the upper surface of the tray. Then the ball cage is pressed down. The guide sleeve and the guide column can guide the movement path of the tray so that the ball cage can move in a straight line. During the process of the ball cage being pressed down, the ball cage can exert force on the steel balls, and the steel balls can squeeze the spherical surface to make the slider slide in the base. The worker can observe the detection reading of the micrometer and record the minimum reading of the micrometer detection.

[0007] Furthermore, it also includes a screw, which is threadedly connected to the guide post and can abut against the upper surface of the tray.

[0008] In the above technical solution, the screws can limit the position of the tray to prevent the tray from detaching from the guide pillars.

[0009] Furthermore, it also includes a rotating part, which is rotatably installed inside the base. The rotating part can simultaneously contact the end of the slider away from the steel ball and the detection end of the micrometer. The detection end of the micrometer is horizontally arranged, and the slider can apply force to the detection end of the micrometer through the rotating part.

[0010] In the above technical solution, the slider applies force to the micrometer through the rotating part. This design allows the micrometer to be installed horizontally on the base, making it easier for workers to read the indication of the micrometer.

[0011] Furthermore, a limiting end for limiting the steel ball from leaving the base is formed on the base.

[0012] In the above technical solution, the limiting end can prevent the steel ball from falling off the base.

[0013] Furthermore, it also includes a plurality of springs 2 that can force the tray to be close to one end of the base close to the steel ball.

[0014] In the above technical solution, by setting the second spring, the tray can always keep in close contact with the ball cage when the person manually presses down the ball cage, thereby improving the user experience.

[0015] Furthermore, the base includes a mounting column and a mounting seat. The slider and spring 1 are both located in the mounting column, the steel ball is embedded in the mounting column and can be exposed from the mounting column; the mounting seat is detachably mounted on the mounting column, the rotating member is rotatably mounted on the mounting seat, and the guide column and the micrometer are both mounted on the mounting seat.

[0016] In the above technical solution, the mounting column and the mounting seat are detachably connected, which facilitates the installation of the rotating part.

[0017] Furthermore, the mounting column includes a column and a mounting block detachably mounted on the column, the slider and the spring are both located in the column, the mounting block is provided with a plurality of grooves for correspondingly embedding a plurality of steel balls, and the mounting seat is installed at one end of the column away from the mounting block.

[0018] In the above technical solution, the steel ball is first placed in the embedding groove, and then the mounting block is installed on the column, and the steel ball is installed. This design facilitates the installation of the steel ball.

[0019] Furthermore, the mounting seat includes a base block and a clamping block installed on the base block, the base block is provided with a clamping hole for the clamping block to be clamped in, the rotating member is rotatably mounted on the clamping block, and the guide column and the micrometer are both mounted on the base block.

[0020] In the above technical solution, a worker can first rotate and install the rotating member on the clamping block, and then clamp the clamping block into the clamping hole, so that the rotating member can be fixed in position relative to the bottom block.

[0021] In summary, the present application has the following technical effects: the inner wall of the ball cage is simultaneously abutted against several steel balls and the end face of the ball cage is simultaneously abutted against the upper surface of the tray, and then the ball cage is pressed down, the guide sleeve and the guide column can guide the movement path of the tray so that the ball cage can move in a straight line, and in the process of the ball cage being pressed down, the ball cage can exert force on the steel balls, and the steel balls can squeeze the spherical surface so that the slider slides in the base, and the worker can observe the detection reading of the micrometer and record the minimum reading of the micrometer detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of this application;

[0023] Figure 2 It is a schematic diagram of the structure of the installation block in this application;

[0024] Figure 3 is a cross-sectional view of the overall structure of the present application;

[0025] Figure 4 It is a structural schematic diagram of the mounting base in this application.

[0026] Description of reference numerals:

[0027] 1. Base; 11. Mounting column; 111. Column; 1111. Placement groove; 112. Mounting block; 1121. Embedded groove; 12. Mounting seat; 121. Bottom block; 1211. Clamping hole; 122. Clamping block; 15. Slide groove; 151. Upper groove; 152. Lower groove; 2. Steel ball; 3. Slider; 31. Spherical surface; 32. Upper slider; 33. Lower slider; 4. Spring 1; 5. Micrometer; 6. Tray; 7. Guide column; 8. Guide sleeve; 9. Screw; 10. Rotating part; 13. Limit end; 14. Spring 2. DETAILED DESCRIPTION

[0028] Please refer to the attached drawings in the instruction manual. Figure 1 and Figure 2An embodiment of the present application provides a DOJ ball cage grading inspection fixture, including a base 1, the base 1 includes a mounting column 11, the mounting column 11 includes a vertically placed column 111 and a mounting block 112 detachably mounted on the top of the column 111, the mounting block 112 is provided with six embedding grooves 1121, the six embedding grooves 1121 are located on the same circumference, each embedding groove 1121 is used for embedding a steel ball 2, the steel ball 2 can be exposed on the mounting block 112, the six steel balls 2 can contact the same ball cage, and the mounting block 112 is formed with a limit end 13 to prevent the steel ball 2 from escaping from the mounting block 112. A slide groove 15 is provided inside the column 111, and the length direction of the slide groove 15 is consistent with the length direction of the column 111. The slide groove 15 is slidably connected with a slider 3, and the slider 3 can slide along the height direction of the column 111. The slide groove 15 includes an upper groove 151 and a lower groove 152. The upper groove 151 is located above the lower groove 152. The axial directions of the upper groove 151 and the lower groove 152 are consistent with the length direction of the column 111. The slider 3 includes an upper slider 32 and a lower slider 33. A spherical surface 31 is formed on the top of the upper slider 32. The upper slider 32 slides vertically along the length direction of the upper groove 151, and the lower slider 33 can slide vertically along the length direction of the lower groove 152. The radius of the lower groove 152 is smaller than the radius of the upper groove 151. The slider 3 is forced by a spring 4 The spring 14 is a compression spring. A placement groove 1111 is provided in the column 111. The axis of the placement groove 1111 is consistent with the axis of the slide groove 15. The radius of the placement groove 1111 is larger than the radius of the lower groove 152 and smaller than the radius of the upper groove 151. The placement groove 1111 is located below the upper groove 151. The placement groove 1111, the lower groove 152 and the upper groove 151 are connected. One end of the spring 4 in the length direction abuts against the bottom surface of the placement groove 1111, and the end of the spring 4 away from the placement groove 1111 abuts against the bottom of the upper slider 32. The ball cage can apply force to the spherical surface 31 through the steel ball 2 so that the slider 3 moves downward in the column 111 along the height direction of the column 111. A mounting seat 12 is detachably mounted at the bottom of the column 111, a rotating member 10 is rotatably mounted on the mounting seat 12, a horizontally placed micrometer 5 is detachably mounted on the mounting seat 12, the rotating member 10 can contact the bottom of the slider 3 and the detection end of the micrometer 5 at the same time, and when the ball cage is sleeved on the mounting column 11, it can squeeze the steel ball 2, and then the steel ball 2 can squeeze the spherical surface 31 so that the slider 3 slides vertically downward to rotate the rotating member 10, and the rotation of the rotating member 10 can drive the detection end of the micrometer 5 to extend and retract, and the worker can read the minimum value detected by the micrometer 5.

[0029] Please refer to the attached drawings in the instruction manual. Figure 1 and Figure 3The mounting seat 12 includes a bottom block 121 that can be detachably mounted on the bottom of the column 111. The micrometer 5 can be detachably mounted on the bottom block 121. A clamping hole 1211 is provided at one end of the bottom block 121 close to the column 111. The clamping hole 1211 is used for a clamping block 122 to be clamped in. The rotating member 10 is rotatably connected to the clamping block 122. The clamping block 122 and the bottom block 121 can be detachably connected by a fastener, which can be a screw to ensure that the clamping block 122 is fixed relatively firmly relative to the bottom block 121. Three guide posts 7 are detachably mounted on the bottom block 121. The three guide posts 7 are arranged around the column 111 and are placed vertically. Each guide post 7 is sleeved with a spring 2 14. The spring 2 14 is a compression spring. The three guide posts 7 are slidably connected to the same tray 6. The upper surface of the tray 6 is used to contact the end surface of the ball cage. The tray 6 is approximately annular and placed horizontally. The three guide posts 7 are penetrated by the tray 6. A guide sleeve 8 is installed at the bottom of the tray 6. The inner wall of the guide sleeve 8 fits the axial outer wall of the guide post 7 everywhere, so that the tray 6 can slide straightly in the vertical direction. The spring 2 14 can force the tray 6 to move vertically away from the bottom of the column 111. A screw 9 is threadedly connected to the top of the guide post 7. The screw 9 can abut against the upper surface of the tray 6 while being installed on the guide post 7. The screw 9 can limit the tray 6 to prevent the tray 6 from detaching from the guide post 7. By providing the guide column 7 and the guide sleeve 8 to guide the movement path of the tray 6, the axis of the ball cage can be always perpendicular to the axis of the column 111 during the process of pressing the ball cage down along the height direction of the column 111, thereby ensuring the accuracy of the detection result.

[0030] The working principle of this embodiment is as follows: the ball cage is put on the installation column 11 so that the end surface of the ball cage abuts against the upper surface of the tray 6, and then the ball cage is pressed down while observing the reading of the micrometer 5, and the minimum value detected by the micrometer 5 is recorded.

[0031] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A DOJ ball cage grading inspection fixture, characterized in that: include: A base (1), wherein the base (1) is embedded with a plurality of steel balls (2), the plurality of steel balls (2) can be exposed from the base (1), and the plurality of steel balls (2) can be in contact with the same ball cage; A slider (3), wherein the slider (3) is formed with a spherical surface (31), the slider (3) is located in a base (1), a slide groove (15) is provided in the base (1), the length direction of the slide groove (15) is perpendicular to the ground, and the ball cage can apply force to the spherical surface (31) through the steel ball (2) so that the slider (3) slides in the slide groove (15); Spring 1 (4), the spring 1 (4) is located in the base (1) and can force the spherical surface (31) to keep in close contact with the plurality of steel balls (2); A micrometer (5), the micrometer (5) being detachably mounted on the base (1), and the micrometer (5) being used to detect the displacement of the slider (3); A tray (6), the upper surface of the tray (6) being used for contacting with the end surface of the ball cage; A guide post (7), the guide post (7) being mounted on the base (1), the guide posts (7) being provided in plurality and all being passed through the tray (6), and the plurality of guide posts (7) being arranged vertically; A guide sleeve (8) is mounted on the tray (6) and is slidably connected to the guide post (7) so that the tray (6) can move linearly along the length direction of the guide post (7).

2. A DOJ ball cage grading inspection fixture according to claim 1, characterized in that: It also includes a screw (9), which is threadedly connected to the guide column (7) and can abut against the upper surface of the tray (6).

3. A DOJ ball cage grading inspection fixture according to claim 1, characterized in that: It also comprises a rotating member (10), the rotating member (10) being rotatably mounted inside the base (1), the rotating member (10) being capable of simultaneously contacting an end of the slider (3) facing away from the steel ball and a detection end of the micrometer (5), the detection end of the micrometer (5) being arranged horizontally, and the slider (3) being capable of applying force to the detection end of the micrometer (5) through the rotating member (10).

4. A DOJ ball cage grading inspection fixture according to claim 1, characterized in that: The base (1) is formed with a limiting end (13) for limiting the steel ball (2) from leaving the base (1).

5. A DOJ ball cage grading inspection fixture according to claim 1, characterized in that: It also includes a plurality of springs (14) capable of forcing the tray (6) to be close to one end of the base (1) close to the steel ball (2).

6. A DOJ ball cage grading inspection fixture according to claim 3, characterized in that: The base (1) comprises: A mounting column (11), wherein the slider (3) and the spring (4) are both located in the mounting column (11), and the steel ball (2) is embedded in the mounting column (11) and can be exposed from the mounting column (11); A mounting seat (12), wherein the mounting seat (12) is detachably mounted on the mounting column (11), the rotating member (10) is rotatably mounted on the mounting seat (12), and the guide column (7) and the micrometer (5) are both mounted on the mounting seat (12).

7. A DOJ ball cage grading inspection fixture according to claim 6, characterized in that: The mounting column (11) comprises a column (111) and a mounting block (112) detachably mounted on the column (111); the slider (3) and the spring (4) are both located in the column (111); the mounting block (112) is provided with a plurality of grooves (1121) for a plurality of steel balls (2) to be embedded in one-to-one correspondence; and the mounting seat (12) is mounted at one end of the column (111) away from the mounting block (112).

8. A DOJ ball cage grading inspection fixture according to claim 6, characterized in that: The mounting seat (12) comprises a bottom block (121) and a clamping block (122) mounted on the bottom block (121); the bottom block (121) is provided with a clamping hole (1211) for the clamping block (122) to be clamped in; the rotating member (10) is rotatably mounted on the clamping block (122); and the guide column (7) and the micrometer (5) are both mounted on the bottom block (121).

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