A gap checking device for a universal joint inner race

Abstract

The application belongs to the technical field of inner ball cage inspection, and particularly relates to a gap inspection device for an inner ball cage of an automobile universal joint, which comprises an inspection table, and a controller is fixedly connected to the upper side wall of the inspection table. When the axial gap of the inner ball cage of the automobile universal joint is inspected, the rubber dust cover can be pried open and air can be blown inwards, so that the hindrance of the elastic restraint of the rubber dust cover to the axial movement is eliminated, and an annular pressure relief channel is formed between the end face of the inner ball cage and the dust cover. In cooperation with low-pressure air blowing, the accumulated lubricating grease at the raceway and the end face can be effectively loosened and dredged, the viscous damping and the high-pressure oil film effect are reduced, the lubricating grease can be smoothly discharged through the pried open gap, the interference of the lubricating grease and the dust cover on the real axial displacement is greatly reduced, and the accuracy, stability and repeatability of the axial gap detection are significantly improved.

Description

Technical Field

[0001] This invention belongs to the field of internal ball joint inspection technology, and in particular relates to a clearance inspection device for the internal ball joint of an automotive universal joint. Background Technology

[0002] The CV joint inner ferrule is a key component in the automotive half-shaft transmission system. The clearance between the steel balls and raceways inside the CV joint directly affects the vehicle's transmission efficiency, ride smoothness, and service life. Excessive clearance will cause impacts, abnormal noises, and vibrations during transmission, accelerate component wear, and even lead to transmission failure. Insufficient clearance will cause movement stagnation, severe overheating, and affect the stability of power transmission. Therefore, accurate testing of the axial, radial, and torsional clearances during the production and maintenance of the inner ferrule is an important step in ensuring product quality and vehicle reliability.

[0003] When testing the axial clearance of the inner CV joint, the rubber dust covers fixed at both ends by clamps and the grease inside can significantly interfere with the test results. After the dust covers are tightened by the clamps, they will generate elastic tensile or compressive resistance during axial movement, which will hinder the true free displacement of the inner CV joint shell. At the same time, the internal grease will form viscous damping and high-pressure oil film effect, which will cause the axial movement of the inner CV joint to be unsmooth, resulting in phenomena such as displacement lag and stick-slip jump. This will cause the measured clearance value to deviate significantly from the true value, resulting in poor repeatability of the test results and failing to accurately reflect the actual assembly clearance state of the inner CV joint.

[0004] To address this issue, a clearance inspection device for the ball joint cage in automotive universal joints is proposed. Summary of the Invention

[0005] The purpose of this invention is to address the above-mentioned problems by providing a clearance inspection device for the ball joint cage in an automotive universal joint.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a clearance inspection device for the inner ball cage of an automotive universal joint, comprising an inspection table, wherein a controller is fixedly connected to the upper side wall of the inspection table, and further comprising:

[0007] A support platform, with an electric clamp fixedly connected to its upper side wall. The electric clamp holds the inner ball cage of the universal joint of the automobile to be tested, and the clamping end of the electric clamp is rotatable.

[0008] A connecting plate is fixedly connected to the upper side wall of the inspection table. A first electric push rod is fixedly connected to the side wall of the connecting plate near the inner ball cage of the automotive universal joint. The moving end of the first electric push rod is connected to an inspection component through a first pressure sensor.

[0009] The sensing component is installed on the upper side wall of the inspection table and located above the ball cage inside the automotive universal joint, and is used to determine whether the outer rod of the half shaft of the ball cage inside the automotive universal joint is in a horizontal state.

[0010] An auxiliary component, located on the upper side wall of the inspection table and below the outer rod of the inner ball cage half shaft of the automotive universal joint, is used to open the dust cover on the surface of the inner ball cage of the automotive universal joint.

[0011] Preferably, the inspection assembly includes a fixed cylinder fixedly connected to the moving end of a first electric push rod. An inspection ring is rotatably connected to the inner wall of the fixed cylinder via a bearing. A counterweight is connected to the lower side wall of the inspection ring extending from the fixed cylinder via a lifting electric push rod. A second electric push rod is fixedly connected to the lower inner wall of the inspection ring. A V-shaped seat is fixedly connected to the moving end of the second electric push rod via a second pressure sensor. A first laser receiver is fixedly connected to the lower side wall of the V-shaped seat. A first laser generator adapted to the first laser receiver is fixedly connected to the lower inner wall of the inspection ring. A fixed electric push rod is fixedly connected to the upper inner wall of the inspection ring. A fixed plate is connected to the moving end of the fixed electric push rod via a pressure sensor. A second laser generator is fixedly connected to the side wall of the connecting plate. A second laser receiver adapted to the second laser generator is fixedly connected to the side wall of the fixed cylinder. A drive assembly is connected to the side wall of the fixed cylinder.

[0012] Preferably, the drive assembly includes a drive motor fixedly connected to the left side wall of the fixed cylinder, a drive frame fixedly connected to the output end of the drive motor, the drive frame having an L-shaped structure, a third pressure sensor fixedly connected to both sides of the drive frame, an angle sensor connected to the upper side wall of the fixed cylinder via a bracket, a detection wheel fixedly connected to the detection end of the angle sensor, and a rubber ring fixedly sleeved on the outer wall of the inspection ring, which contacts the detection wheel.

[0013] Preferably, the sensing component includes a sensing frame fixedly connected to the side wall of the inspection table. The sensing frame has an inverted L-shaped structure. A third electric push rod is fixedly connected to the upper side wall of the sensing frame. The moving end of the third electric push rod passes through the sensing frame and is fixedly connected to a connecting frame. The connecting frame has an inverted U-shaped structure. Both ends of the connecting frame are respectively connected to a third laser generator and a third laser receiver through elastic elements.

[0014] Preferably, the auxiliary component includes a lead screw linear module fixedly connected to the side wall of the inspection table, an auxiliary electric push rod fixedly connected to the moving end of the lead screw linear module, an arc-shaped plate fixedly connected to the moving end of the auxiliary electric push rod, a plurality of placement plates fixedly connected to the right side wall of the arc-shaped plate, a small electric push rod fixedly connected to the side wall of the placement plate, a pawl fixedly connected to the moving end of the small electric push rod, and an air blowing component connected to the side wall of the arc-shaped plate.

[0015] Preferably, the air blowing assembly includes an arc-shaped tube fixedly connected to the right side wall of the arc-shaped plate, an air blowing cylinder fixedly connected to the left side wall of the pawl, a horizontal tube fixedly connected to the left side wall of the air blowing cylinder, a telescopic tube fixedly connected between the horizontal tube and the arc-shaped tube, an air blowing pump fixedly connected to the left side wall of the arc-shaped plate, the air outlet of the air blowing pump passing through the arc-shaped plate and fixedly connected to the arc-shaped tube, a support ring fixedly connected to the inner wall of the air blowing cylinder, a piston block fixedly connected to the upper side wall of the support ring by a spring, an air blowing hole opened inside the piston block, and the air blowing port of the air blowing hole facing to the right.

[0016] Preferably, the inner wall of the arc-shaped plate is fixedly connected with a plurality of elastic rods, and the upper end of the elastic rods is fixedly connected with a fourth pressure sensor.

[0017] Preferably, the air inlet of the air pump is fixedly connected to a filter cylinder, and a filter screen is fixedly connected to the inner wall of the filter cylinder.

[0018] Compared with existing technologies, the advantages of a clearance inspection device for the ball joint inner cage in automobiles are:

[0019] 1. By using the auxiliary components and air blowing components, when checking the axial clearance of the ball cage inside the automotive universal joint, the rubber dust cover can be opened and air blown inward to eliminate the resistance of the elastic restraint of the rubber dust cover to axial movement. An annular pressure relief channel is formed between the end face of the inner ball cage and the dust cover. With the low-pressure air blowing, the accumulated grease on the raceway and end face can be effectively loosened and guided, reducing viscous damping and high-pressure oil film effect, allowing the grease to be smoothly discharged through the opened gap. This greatly reduces the interference of grease and dust cover on the actual axial displacement, and significantly improves the accuracy, stability and repeatability of axial clearance detection.

[0020] 2. By using the set inspection components, when inspecting the axial clearance of the inner ball cage of an automotive universal joint, the simultaneous detection of axial clearance, radial clearance, and circumferential torsional clearance at the same station can be achieved. This allows for the measurement of multiple key indicators in a single clamping, reducing positioning errors caused by repeated workpiece clamping and improving inspection efficiency and measurement consistency. At the same time, the simultaneous acquisition of multi-dimensional clearance data can comprehensively reflect the fit status of the inner ball cage, avoiding misjudgments and missed detections caused by single indicator detection, improving the completeness and reliability of the inspection results, and providing a more comprehensive and accurate basis for product quality assessment.

[0021] 3. By using the set sensing components, when detecting the clearance of the inner ball cage of the automotive universal joint, the outer rod of the inner ball cage half shaft is kept in a horizontal state. This can avoid the off-center load, tilting jamming and displacement caused by the weight of the half shaft and the inner ball cage itself, ensuring uniform force and smooth movement during axial, radial and circumferential clearance detection. It effectively eliminates the measurement error caused by gravity, improves the accuracy and data repeatability of clearance detection in all directions, and facilitates stable workpiece clamping and centering positioning, thereby improving the overall detection reliability. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of a clearance inspection device for the ball joint inner cage of an automobile, provided by the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of an auxiliary component in a clearance inspection device for the ball joint inner cage of an automobile, provided by the present invention.

[0024] Figure 3 This is a schematic diagram of the sensing component in a clearance inspection device for the ball joint inner cage of an automobile, provided by the present invention.

[0025] Figure 4 This is a schematic diagram of the drive assembly in a clearance inspection device for the ball joint inner cage of an automobile, provided by the present invention.

[0026] Figure 5 This is a schematic diagram of the internal structure of the inspection ring in a clearance inspection device for the ball cage inside an automotive universal joint, provided by the present invention.

[0027] Figure 6 This is a schematic diagram of the shape and structure of the pawl in a clearance inspection device for the ball joint inner cage of an automobile, provided by the present invention.

[0028] Figure 7 This is a schematic diagram showing the positional relationship of the air pump in a clearance inspection device for the ball joint inner cage of an automobile provided by the present invention.

[0029] Figure 8 This is a schematic diagram of the air blowing assembly in a clearance inspection device for the ball joint inner cage of an automobile provided by the present invention;

[0030] Figure 9 This is a schematic diagram of the internal structure of the air blower in a clearance inspection device for the ball joint cage of an automobile provided by the present invention.

[0031] In the diagram: 1 Inspection table, 2 Controller, 3 Support platform, 4 Electric clamp, 5 Connecting plate, 6 First electric push rod, 7 First pressure sensor, 8 Inspection assembly, 81 Fixed cylinder, 82 Inspection ring, 9 Counterweight, 10 Second electric push rod, 11 Second pressure sensor, 12 V-type seat, 13 First laser receiver, 14 First laser generator, 15 Fixed electric push rod, 16 Fixed plate, 17 Second laser generator, 18 Second laser receiver, 19 Drive assembly, 191 Drive motor, 192 Drive frame, 20 Third pressure sensor, 21 Angle sensor, 22 Detection wheel, 23 Rubber... Rubber ring, 24. Sensing component, 241. Sensing frame, 242. Third electric push rod, 25. Connecting frame, 26. Third laser generator, 27. Third laser receiver, 28. Auxiliary component, 281. Lead screw linear module, 282. Auxiliary electric push rod, 29. Arc plate, 30. Placement plate, 31. Small electric push rod, 32. Paw, 33. Air blowing component, 331. Arc tube, 332. Air blowing cylinder, 34. Horizontal tube, 35. Telescopic tube, 36. Air blowing pump, 37. Support ring, 38. Piston block, 39. Air blowing hole, 40. Elastic rod, 41. Fourth pressure sensor, 42. Filter cylinder, 43. Filter screen, 44. Lifting electric push rod. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0033] like Figures 1-9 As shown, a clearance inspection device for the ball joint inner cage of an automobile includes an inspection table 1, a controller 2 fixedly connected to the upper side wall of the inspection table 1, and further includes:

[0034] Support platform 3, with an electric clamp 4 fixedly connected to the upper side wall of support platform 3. The electric clamp 4 holds the inner ball cage of the universal joint of the automobile to be tested, and the clamping end of the electric clamp 4 can rotate.

[0035] A connecting plate 5 is fixedly connected to the upper side wall of the inspection table 1. A first electric push rod 6 is fixedly connected to the side wall of the connecting plate 5 near the inner ball cage of the automotive universal joint. The moving end of the first electric push rod 6 is connected to an inspection assembly 8 via a first pressure sensor 7. The inspection assembly 8 includes a fixed cylinder 81 fixedly connected to the moving end of the first electric push rod 6. An inspection ring 82 is rotatably connected to the inner wall of the fixed cylinder 81 via a bearing. A counterweight 9 is connected to the lower side wall of the inspection ring 82 extending out of the fixed cylinder 81 via a lifting electric push rod 44. A second electric push rod 10 is fixedly connected to the lower inner wall of the inspection ring 82. The moving end of the second electric push rod 10 is connected to a first electric push rod 44 via a first electric push rod 9. Two pressure sensors 11 are fixedly connected to a V-shaped seat 12. A first laser receiver 13 is fixedly connected to the lower side wall of the V-shaped seat 12. A first laser generator 14 adapted to the first laser receiver 13 is fixedly connected to the lower inner wall of the inspection ring 82. A fixed electric push rod 15 is fixedly connected to the upper inner wall of the inspection ring 82. The moving end of the fixed electric push rod 15 is connected to a fixed plate 16 through a pressure sensor. A second laser generator 17 is fixedly connected to the side wall of the connecting plate 5. A second laser receiver 18 adapted to the second laser generator 17 is fixedly connected to the side wall of the fixed cylinder 81. A drive assembly 19 is connected to the side wall of the fixed cylinder 81.

[0036] The drive assembly 19 includes a drive motor 191 fixedly connected to the left side wall of the fixed cylinder 81. The output end of the drive motor 191 is fixedly connected to a drive frame 192, which has an L-shaped structure. Both sides of the drive frame 192 are fixedly connected to third pressure sensors 20. An angle sensor 21 is connected to the upper side wall of the fixed cylinder 81 via a bracket. A detection wheel 22 is fixedly connected to the detection end of the angle sensor 21. A rubber ring 23 that contacts the detection wheel 22 is fixedly sleeved on the outer wall of the inspection ring 82.

[0037] The sensing component 24 is disposed on the upper side wall of the inspection table 1 and located above the ball cage inside the automotive universal joint. The sensing component 24 includes a sensing frame 241 fixedly connected to the upper side wall of the inspection table 1. The sensing frame 241 has an inverted L-shaped structure. A third electric push rod 242 is fixedly connected to the upper side wall of the sensing frame 241. The moving end of the third electric push rod 242 passes through the sensing frame 241 and is fixedly connected to a connecting frame 25. The connecting frame 25 has an inverted U-shaped structure. Both ends of the connecting frame 25 are respectively connected to a third laser generator 26 and a third laser receiver 27 through elastic elements, which are used to determine whether the outer rod of the half shaft of the ball cage inside the automotive universal joint is in a horizontal state.

[0038] Auxiliary component 28 is disposed on the upper side wall of inspection table 1 and located below the outer rod of the CV joint inner ferrule. Auxiliary component 28 includes a lead screw linear module 281 fixedly connected to the upper side wall of inspection table 1. An auxiliary electric push rod 282 is fixedly connected to the moving end of the lead screw linear module 281. An arc plate 29 is fixedly connected to the moving end of the auxiliary electric push rod 282. Multiple elastic rods 40 are fixedly connected to the inner wall of the arc plate 29. A fourth pressure sensor 41 is fixedly connected to the upper end of the elastic rods 40. Multiple placement plates 30 are fixedly connected to the right side wall of the arc plate 29. A small electric push rod 31 is fixedly connected to the side wall of the placement plate 30. A pawl 32 is fixedly connected to the moving end of the small electric push rod 31. An air blowing component 33 is connected to the side wall of the arc plate 29 for opening the dust cover on the surface of the CV joint inner ferrule.

[0039] The air blowing assembly 33 includes an arc-shaped tube 331 fixedly connected to the right side wall of the arc-shaped plate 29, an air blowing cylinder 332 fixedly connected to the left side wall of the pawl 32, a horizontal tube 34 fixedly connected to the left side wall of the air blowing cylinder 332, a telescopic tube 35 fixedly connected between the horizontal tube 34 and the arc-shaped tube 331, an air blowing pump 36 fixedly connected to the left side wall of the arc-shaped plate 29, a filter cylinder 42 fixedly connected to the air inlet end of the air blowing pump 36, a filter screen 43 fixedly connected to the inner wall of the filter cylinder 42, an air outlet end of the air blowing pump 36 passing through the arc-shaped plate 29 and fixedly connected to the arc-shaped tube 331, a support ring 37 fixedly connected to the inner wall of the air blowing cylinder 332, a piston block 38 fixedly connected to the upper side wall of the support ring 37 by a spring, an air blowing hole 39 opened inside the piston block 38, and the air blowing port of the air blowing hole 39 is set to the right.

[0040] The operating principle of this invention is explained as follows: The operator places the CV joint inner cage of the automobile universal joint to be inspected into the electric clamp 4 and clamps it using the electric clamp 4. Then, the operator uses a support rod or other lifting tool to lift the outer half-shaft rod of the CV joint inner cage. Meanwhile, another operator controls the first electric push rod 6 through the controller 2 to move the first electric push rod 6 to the right, causing the fixed cylinder 81 and the inspection ring 82 to move to the set position, so that the outer half-shaft rod is above the V-shaped seat 12 inside the inspection ring 82. Then, the operator releases the outer half-shaft rod, and the outer half-shaft rod will fall into the V-shaped seat 12 under the action of gravity. Then, the operator sends an electrical signal to the controller 2. After receiving the electrical signal, the controller 2 first controls the third electric push rod 242 to work. The third electric push rod 242 drives the third laser generator 26 and the third... The laser receiver 27 moves downwards together to an appropriate distance, so that both the third laser generator 26 and the third laser receiver 27 are in contact with the outer rod of the half shaft. Since the left end of the outer rod of the half shaft is in the V-shaped seat 12 at this time, and the height of the V-shaped seat 12 is lower than the height of the center of the electric clamp 4, the third laser generator 26 and the third laser receiver 27 are not on the same straight line under the action of the elastic element when they are in contact with the outer rod of the half shaft. Subsequently, the controller 2 controls the second electric push rod 10 to work. The second electric push rod 10 drives the left end of the outer rod of the half shaft to rotate upwards along the clamping end of the electric clamp 4 (the clamping end of the electric clamp 4 can be unlocked and rotated) through the V-shaped seat 12. When the outer rod of the half shaft rotates to the horizontal state, the laser signal emitted by the third laser generator 26 will be received by the third laser receiver 27. After the controller 2 detects this situation, it will control the second electric push rod 10 to stop working.

[0041] Next, controller 2 controls the auxiliary electric push rod 282 to work, causing the auxiliary electric push rod 282 to move the arc plate 29 upward together. When the elastic rod 40 on the inner wall of the arc plate 29 drives the fourth pressure sensor 41 to contact the outer rod of the half shaft, and all the pressure values ​​detected by the fourth pressure sensors 41 are the same, controller 2 will control the auxiliary electric push rod 282 to stop working. At this time, the centers of the arc plate 29 and the outer rod of the half shaft are on the same straight line. Then, controller 2 controls multiple small electric push rods 31 to work. The small electric push rods 31 will drive the pawl 32 to move towards the outer rod of the half shaft to a set distance, so that the pawl 32 and the outer rod of the half shaft are in contact. When the pawl 32 and the outer rod of the half shaft are in contact, the piston block 38 will also contact the outer rod of the half shaft. The piston block 38 is pressed towards the air blower 332 by the outer rod of the half shaft. Then, the controller 2 controls the linear screw module 281 to work, so that the linear screw module 281 drives the pawl 32 to insert into the rubber dust cover on the outside of the outer rod of the half shaft (the clamp on the outside of the rubber dust cover has been removed in advance). Then, the controller 2 controls the auxiliary electric push rod 282 to work in reverse to the set position, and the pawl 32 opens the rubber dust cover. When the pawl 32 and the outer rod of the half shaft separate, the piston block 38 will extend out of the air blower 332 under the action of the spring force. Then, the controller 2 controls the air pump 36 to work for a set time to blow the gas into the inner ball cage, which can effectively loosen and guide the grease accumulated in the raceway and end face, and reduce the viscous damping and high pressure oil film effect.

[0042] When the air pump 36 stops working, the controller 2 controls the fixed electric push rod 15 to move the fixed plate 16 downward to fix the outer rod of the half shaft. Then the controller 2 controls the first electric push rod 6 to work. The first electric push rod 6 pushes the fixed cylinder 81 to move through the first pressure sensor 7. The fixed cylinder 81 pushes the outer rod of the half shaft through the inspection ring 82, V-shaped seat 12 and fixed plate 16. When the controller 2 detects through the first pressure sensor 7 that the thrust applied by the first electric push rod 6 to the fixed cylinder 81 exceeds 100N, the controller 2 controls the first electric push rod 6 to stop working and controls the first electric push rod 6 to drive the fixed cylinder 81 to move in the opposite direction until the first pressure sensor 7 detects a force of -100N. Then the controller 2 controls the first electric push rod 6 to stop working. The controller 2 determines the difference between the two moving distances through the second laser generator 17 and the second laser receiver 18, which is the true axial clearance.

[0043] Next, controller 2 controls the fixed electric push rod 15 to move the fixed plate 16 upward to the initial position, and controls the second electric push rod 10 to work. The second electric push rod 10 drives the left end of the half shaft outer rod to rotate upward through the second pressure sensor 11 and V-shaped seat 12 (the clamping end of the electric clamp 4 is in the locked state at this time). When controller 2 detects that the compressive force between V-shaped seat 12 and half shaft outer rod reaches 50N through the second pressure sensor 11, controller 2 will control the second electric push rod 10 to stop working and control the second electric push rod 10 to return to its original position. At the same time, the distance moved by V-shaped seat 12 is recorded by the first laser generator 14 and the first laser receiver 13, which is the true radial clearance.

[0044] Then, controller 2 controls the fixed electric push rod 15 to work, using the fixing plate 16 to fix the outer rod of the half shaft. Subsequently, it controls the drive motor 191 to work. The drive motor 191 drives the third pressure sensor 20 on one side through the drive frame 192 to push the counterweight 9, causing the inspection ring 82, V-shaped seat 12, and fixing plate 16 to rotate the outer rod of the half shaft. When controller 2 detects that the force on the outer rod of the half shaft is 10N through the third pressure sensor 20, controller 2 detects the torsional angle of the outer rod of the half shaft through the angle sensor 21 (when the inspection ring 82 rotates, the friction between the detection wheel 22 and the rubber ring 23 will cause the angle sensor 21 to rotate by a certain angle), and controls the drive motor 191 to stop working, and controls the lifting electric push rod 44 to drive the counterweight. Block 9 moves upward to the set position. Then, controller 2 controls drive motor 191 to drive drive frame 192 to rotate to the other side of counterweight block 9, and controls drive motor 191 to rotate in the opposite direction, repeating the above principle to push counterweight block 9 in the opposite direction. The angle sensor 21 records the torsion angle. The difference between the two torsion angles is the true circumferential torsion clearance. The operator can analyze the main wear parts based on the detection information. When the axial clearance is large and the circumferential torsion clearance is significantly large, while the radial clearance is relatively small, it indicates that the star-shaped sleeve is severely worn. When the axial clearance is large and the radial clearance is also significantly large, while the circumferential torsion clearance is relatively normal, it indicates that the bell-shaped shell is severely worn. When the axial clearance is large and the radial and circumferential clearances increase synchronously and uniformly, it indicates that the steel ball is severely worn.

[0045] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A clearance inspection device for the ball joint inner cage of an automobile, comprising an inspection table (1), wherein a controller (2) is fixedly connected to the upper side wall of the inspection table (1), characterized in that, Also includes: Support platform (3), the upper side wall of the support platform (3) is fixedly connected to an electric clamp (4), the electric clamp (4) holds the ball cage of the universal joint of the automobile to be tested, and the clamping end of the electric clamp (4) is rotatable; A connecting plate (5) is fixedly connected to the upper side wall of the inspection table (1). A first electric push rod (6) is fixedly connected to the side wall of the connecting plate (5) near the ball cage of the automobile universal joint. The moving end of the first electric push rod (6) is connected to the inspection component (8) through the first pressure sensor (7). The sensing component (24) is set on the upper side wall of the inspection table (1) and located above the ball cage inside the automobile universal joint, and is used to determine whether the outer rod of the half shaft of the ball cage inside the automobile universal joint is in a horizontal state. An auxiliary component (28) is provided on the upper side wall of the inspection table (1) and located below the outer rod of the inner ball cage half shaft of the automotive universal joint, for opening the dust cover on the surface of the inner ball cage of the automotive universal joint. The inspection assembly (8) includes a fixed cylinder (81) fixedly connected to the moving end of the first electric push rod (6). The inner wall of the fixed cylinder (81) is rotatably connected to an inspection ring (82) via a bearing. The lower side wall of the inspection ring (82) extending out of the fixed cylinder (81) is connected to a counterweight (9) via a lifting electric push rod (44). The lower inner wall of the inspection ring (82) is fixedly connected to a second electric push rod (10). The moving end of the second electric push rod (10) is fixedly connected to a V-shaped seat (12) via a second pressure sensor (11). The lower side wall of the V-shaped seat (12) is fixedly connected to a first laser receiver. 13) A first laser generator (14) adapted to the first laser receiver (13) is fixedly connected to the lower inner wall of the inspection ring (82). A fixed electric push rod (15) is fixedly connected to the upper inner wall of the inspection ring (82). The moving end of the fixed electric push rod (15) is connected to a fixed plate (16) through a pressure sensor. A second laser generator (17) is fixedly connected to the side wall of the connecting plate (5). A second laser receiver (18) adapted to the second laser generator (17) is fixedly connected to the side wall of the fixed cylinder (81). A drive assembly (19) is connected to the side wall of the fixed cylinder (81).

2. The clearance inspection device for the inner ball cage of an automotive universal joint according to claim 1, characterized in that, The drive assembly (19) includes a drive motor (191) fixedly connected to the left side wall of the fixed cylinder (81). The output end of the drive motor (191) is fixedly connected to a drive frame (192). The drive frame (192) has an L-shaped structure. Both sides of the drive frame (192) are fixedly connected to a third pressure sensor (20). The upper side wall of the fixed cylinder (81) is connected to an angle sensor (21) via a bracket. The detection end of the angle sensor (21) is fixedly connected to a detection wheel (22). The outer wall of the inspection ring (82) is fixedly fitted with a rubber ring (23) that contacts the detection wheel (22).

3. The clearance inspection device for the inner ball cage of an automotive universal joint according to claim 1, characterized in that, The sensing component (24) includes a sensing frame (241) fixedly connected to the upper side wall of the inspection table (1). The sensing frame (241) has an inverted L-shaped structure. A third electric push rod (242) is fixedly connected to the upper side wall of the sensing frame (241). The moving end of the third electric push rod (242) passes through the sensing frame (241) and is fixedly connected to a connecting frame (25). The connecting frame (25) has an inverted U-shaped structure. Both ends of the connecting frame (25) are respectively connected to a third laser generator (26) and a third laser receiver (27) through elastic elements.

4. The clearance inspection device for the inner ball cage of an automotive universal joint according to claim 1, characterized in that, The auxiliary component (28) includes a lead screw linear module (281) fixedly connected to the upper side wall of the inspection table (1). An auxiliary electric push rod (282) is fixedly connected to the moving end of the lead screw linear module (281). An arc plate (29) is fixedly connected to the moving end of the auxiliary electric push rod (282). A plurality of placement plates (30) are fixedly connected to the right side wall of the arc plate (29). A small electric push rod (31) is fixedly connected to the side wall of the placement plate (30). A pawl (32) is fixedly connected to the moving end of the small electric push rod (31). An air blowing component (33) is connected to the side wall of the arc plate (29).

5. A clearance inspection device for the inner ball cage of an automotive universal joint according to claim 4, characterized in that, The air blowing assembly (33) includes an arc-shaped tube (331) fixedly connected to the right side wall of the arc plate (29), an air blowing cylinder (332) fixedly connected to the left side wall of the pawl (32), a horizontal tube (34) fixedly connected to the left side wall of the air blowing cylinder (332), a telescopic tube (35) fixedly connected between the horizontal tube (34) and the arc-shaped tube (331), an air blowing pump (36) fixedly connected to the left side wall of the arc plate (29), the air outlet of the air blowing pump (36) passes through the arc plate (29) and is fixedly connected to the arc-shaped tube (331), a support ring (37) fixedly connected to the inner wall of the air blowing cylinder (332), a piston block (38) fixedly connected to the upper side wall of the support ring (37) by a spring, an air blowing hole (39) is opened inside the piston block (38), and the air blowing port of the air blowing hole (39) is set to the right.

6. A clearance inspection device for the inner ball cage of an automotive universal joint according to claim 4, characterized in that, The inner wall of the arc plate (29) is fixedly connected with a plurality of elastic rods (40), and the upper end of the elastic rods (40) is fixedly connected with a fourth pressure sensor (41).

7. A clearance inspection device for the inner ball cage of an automotive universal joint according to claim 5, characterized in that, The air inlet of the air pump (36) is fixedly connected to a filter cylinder (42), and a filter screen (43) is fixedly connected to the inner wall of the filter cylinder (42).

Images