A shop floor apparatus for detecting threads of a ball bearing wheel hub unit of an automobile

Abstract

The application discloses a workshop equipment for detecting automobile ball bearing wheel hub unit screw thread, and belongs to the technical field of automobile part precision detection equipment. The equipment comprises a lifting frame as a mounting carrier and a lifting adjusting mechanism for controlling the lifting of the lifting frame, a driving mechanism is arranged at the top of the inner side of the lifting frame, a detection support is mounted on the inner side of the lifting frame, and an angle adjusting mechanism is arranged on the top and the inner bottom of the detection support. The angle adjusting mechanism and the first screw thread detection mechanism are used in cooperation, four groups of first screw thread rods can be flexibly adjusted in angle, and the first screw thread rods can be accurately matched with four groups of fixed screw holes in a rectangular or square layout. Compared with a traditional workshop equipment matched with a single shape layout, the equipment does not need to frequently replace equipment or adjust a working position, compatibility of the equipment for different products is obviously improved, and time loss and labor cost caused by equipment conversion are effectively reduced.

Description

Technical Field

[0001] This invention belongs to the technical field of precision testing equipment for automotive parts, specifically relating to a workshop device for testing the threads of automotive ball bearing hub units. Background Technology

[0002] Modern automotive wheel hub units are gradually developing towards an integrated design of "bearing-hub-bolt" (such as wheel hub bearing units). As a key connecting component, the fixing screw hole must withstand axial load, radial load and vibration impact simultaneously. Therefore, accurate testing of the screw threads of automotive ball bearing wheel hub units is a very important and essential step.

[0003] Traditional thread inspection workshop equipment has several limitations: First, existing thread inspection workshop equipment is mostly designed for fixed threaded holes with a single shape layout, such as only being able to inspect threads in fixed threaded holes with a rectangular or square layout. When switching between the two layouts, the positions of the four sets of thread rods need to be manually adjusted. Second, when dealing with fixed threaded holes with special shapes such as regular hexagons, it is also necessary to change to special equipment or complete the inspection through multiple clamping and station switching, which is cumbersome and inefficient, and cannot meet the inspection needs of diverse products. Third, during the inspection process, automotive ball bearing hub units often lack effective limiting and fixing devices, which can easily cause displacement or shaking during the inspection operation, leading to deviations in the inspection data and affecting the accuracy of the inspection results. Fourth, fixed threaded holes often have residual metal shavings and other impurities, and traditional thread inspection workshop equipment often neglects the pre-inspection cleaning process. The presence of impurities can interfere with the accurate measurement of thread parameters by the thread inspection workshop equipment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a workshop device for inspecting the threads of automotive ball bearing hub units.

[0005] The technical solution adopted to solve the above-mentioned technical problems is: a workshop equipment for detecting the threads of automotive ball bearing hub units, including a lifting frame as a mounting carrier and a lifting adjustment mechanism for controlling the lifting of the lifting frame. A drive mechanism is provided on the top of the inner side of the lifting frame, and a detection bracket is installed on the inner side of the lifting frame. An angle adjustment mechanism is provided on both the top and the bottom of the detection bracket. A first thread detection mechanism that cooperates with the angle adjustment mechanism is provided inside the detection bracket. Telescopic mechanisms are provided on both sides of the detection bracket, and a second thread detection mechanism that cooperates with the first thread detection mechanism is provided on the inner side of the telescopic mechanism. A lifting platform mechanism for placing automotive ball bearing hubs is provided below the detection bracket, and a positioning mechanism that cooperates with the lifting platform mechanism is provided at the bottom of the detection bracket.

[0006] Preferably, the driving mechanism includes an L-shaped bracket located at the top of the inner side of the detection bracket, a reduction gear set is mounted on the top of the L-shaped bracket, a first servo motor is mounted on the top of the detection bracket, and the output end of the first servo motor is connected to the input end of the reduction gear set, and a drive wide gear is mounted on the output end of the reduction gear set.

[0007] The above technical solution controls the first servo motor to work with the reduction gear set to drive the wide gear to rotate. Because the reduction gear set reduces the speed of the first servo motor, the wide gear can rotate slowly and uniformly, which helps to improve the stability of the screw rod rotating into the fixing screw hole of the automotive ball bearing hub unit.

[0008] Preferably, the angle adjustment mechanism includes a second servo motor located on one side inside the detection bracket and a drive gear at the output end of the second servo motor. The top and inner bottom of the detection bracket are both hinged with a pair of movable frames on a fixed axis, and the fixed axis is on the same vertical line as the axis that drives the wide gear to rotate. The top and inner bottom of the detection bracket are both provided with lead screws. The same end of the two sets of lead screws is equipped with a driven gear that meshes with the drive gear. The outer thread of the lead screw is provided with a moving block, and the two sides of the moving block are symmetrically hinged with connecting rods. The end of the connecting rod away from the moving block is respectively hinged to the same end of the two adjacent sets of movable frames.

[0009] Through the above technical solution, the second servo motor is controlled to drive the two sets of lead screws to rotate synchronously and uniformly in conjunction with the active gear and two sets of driven gears. The screw action forces the moving block on the lead screw to move, and the moving block pushes the two sets of movable frames that are hinged to each other to rotate around their hinge axis through two sets of connecting rods. This adjusts the included angle between the two sets of movable frames, which can accurately adjust the position of the four sets of first threaded rods. This allows the four sets of first threaded rods to perform thread detection on the four sets of fixed screw holes with different layouts on the automotive ball bearing hub unit, and the four sets of first transmission gears always maintain mutual meshing with the drive wide gear.

[0010] Preferably, the first thread detection mechanism includes two sets of arc-shaped through slots symmetrically opened at the top and bottom of the detection bracket. Four sets of first transmission gears that mesh with the drive wide gear are arranged above the detection bracket. A first rotating shaft is installed on the inner ring of the first transmission gear. Two sets of first torque sensors that are fixedly connected to adjacent movable frames are arranged sequentially at the bottom of the first rotating shaft. The two sets of first torque sensors are connected by a coupling. A first thread rod is installed at the bottom of the bottom set of first torque sensors.

[0011] With the above technical solution, when the first servo motor drives the drive wide gear to rotate at a constant speed, the drive wide gear drives the first rotating shaft to rotate through the first transmission gear, which in turn drives the rotating shafts of the upper and lower sets of first torque sensors and the first threaded rod to rotate synchronously. The outer sides of the upper and lower sets of first torque sensors are fixedly connected to the adjacent movable frame at the bottom, so that when the movable frame rotates, the first rotating shaft, the first torque sensor, the first threaded rod and the first transmission gear rotate together around the hinge shaft of the two sets of movable frames as the axis. During the process, the first rotating shaft moves in the arc-shaped through groove, and the change of torsional torque during the rotation of the first threaded rod is monitored in real time by the two connected sets of first torque sensors.

[0012] Preferably, the telescopic mechanism includes a connecting plate located above the L-shaped bracket. The top of the L-shaped bracket is equipped with two sets of sliding rods that are fixedly connected to the top of the lifting frame, and the two sets of sliding rods pass through the connecting plate. Lifting rods are symmetrically installed on both sides of the bottom of the connecting plate away from the lifting frame. The lifting rods pass through the detection bracket and extend to the bottom of the detection bracket. An electric push rod for driving the connecting plate to lift is installed on the top of the lifting frame.

[0013] Through the above technical solution, the electric push rod is controlled to drive the connecting plate to descend. During the process, the connecting plate slides on two sets of sliding rods, and the two sets of lifting rods at the bottom of the connecting plate will also drive the second thread detection mechanism to descend, so that the bottom end of the second thread rod in the second thread detection mechanism is on the same horizontal plane as the bottom ends of the other four sets of first thread rods. In this way, the thread of the six sets of fixed screw holes with a regular hexagonal layout on the automotive ball bearing wheel hub unit can be detected.

[0014] Preferably, the second thread detection mechanism includes two sets of second transmission gears located above the detection bracket. The inner ring of the second transmission gear is equipped with a second rotating shaft, and the bottom end of the second rotating shaft is sequentially provided with two sets of second torque sensors that are fixedly connected to the lifting rod. The two sets of second torque sensors are connected by a coupling, and the bottom ends of the two sets of second torque sensors at the bottom are each equipped with a second thread rod.

[0015] With the above technical solution, when the electric push rod drives the lifting rod to descend, the entire second thread detection mechanism will also descend accordingly. Even when the height decreases, the second transmission gear will always remain engaged with the drive wide gear. When the drive wide gear rotates, it will also drive the second rotating shaft, the rotating shafts of the two sets of second torque sensors, and the second thread rod to rotate synchronously through the second transmission gear. The rotation direction and speed of the second thread rod are the same as those of the first thread rod. The change of torsional torque during the rotation of the second thread rod can be monitored in real time using the second torque sensor.

[0016] Preferably, the lifting platform mechanism includes a support frame located directly below the detection bracket. A lifting cylinder is installed at the middle position of the top of the support frame, and the output end of the lifting cylinder extends to the top of the support frame and is equipped with a platform. Guide shafts extending into the support frame are installed at the four corners of the bottom of the platform. A positioning pin is installed at the non-center position of the top of the platform. A dust removal assembly is provided at the top inner part of the support frame.

[0017] With the above technical solution, after aligning the positioning hole on the automotive ball bearing hub unit to be tested with the positioning pin and inserting it, and then placing the automotive ball bearing hub unit on the outside of the positioning spindle, the lifting cylinder is controlled to push the platform to the highest position. During the process, the guide shaft rises along with it to ensure the stability of the platform during the lifting process. When replacing the next set of automotive ball bearing hub units to be tested, the platform is controlled to descend, which facilitates the operator to manually replace the automotive ball bearing hub units. In addition, before performing thread testing on the automotive ball bearing hub units, the fixing screw holes of the automotive ball bearing hub units can be cleaned by air jetting using the dust cleaning component to ensure the accuracy of the equipment in detecting the threads inside the fixing screw holes.

[0018] Preferably, the dust removal assembly includes an air pump and an air tank located inside the support frame. The output end of the air pump is connected to the interior of the air tank. An annular pipe is provided on the top of the platform, and air nozzles are evenly arranged on the top of the annular pipe. The air tank is connected to the interior of the annular pipe through a solenoid valve.

[0019] The above technical solution involves controlling the solenoid valve to open for a period of time and then close it before inspecting the threads of the automotive ball bearing hub unit. This allows high-pressure air from the air tank to enter the annular pipe, and then the nozzle sprays air to clean the inside of the fixing screw hole of the automotive ball bearing hub unit. This ensures the accuracy of the equipment in inspecting the threads inside the fixing screw hole. During the period when the operator replaces the automotive ball bearing hub unit, the air pump is controlled to replenish the air tank with high-pressure gas.

[0020] Preferably, the positioning mechanism includes a positioning spindle located at the middle position of the top of the platform, a mounting column installed at the middle position of the bottom of the detection bracket, and a sleeve and a retaining ring connected to each other are sleeved on the outside of the mounting column. A collar adapted to the positioning spindle is installed at the bottom of the retaining ring. A return spring is sleeved on the top of the outside of the mounting column, and the top and bottom of the return spring are fixedly connected to the detection bracket and the sleeve, respectively. A distance sensor that cooperates with the mounting column is provided inside the positioning spindle.

[0021] With the above technical solution, after aligning the positioning hole on the automotive ball bearing hub unit to be tested with the positioning pin and inserting it, so that the automotive ball bearing hub unit is fitted on the outside of the positioning main shaft, as the lifting frame continues to descend, the mounting post is first inserted into the positioning main shaft to play a guiding role. Then, the bottom of the retaining ring gradually abuts against the top of the automotive ball bearing hub unit, and works with the platform to clamp and fix the automotive ball bearing hub unit. When the first threaded rod descends and gradually rotates into the fixing screw hole of the automotive ball bearing hub unit, the collar, retaining ring and sleeve slide upward on the outside of the mounting post. The return spring is compressed and stores elastic potential energy. After the first threaded rod is fully rotated into the screw hole of the automotive ball bearing hub unit, the distance sensor, together with the mounting post, transmits the signal to the external control panel. The external control panel then controls the lifting cylinder to stop driving the lifting frame to descend.

[0022] Preferably, the lifting adjustment mechanism includes a fixed frame located at one end of the lifting frame. One end of the fixed frame is movably connected to the lifting frame via a guide rail. A lifting cylinder is installed on the top of the fixed frame, and the lifting cylinder drives the lifting frame to rise and fall via a connecting frame.

[0023] Through the above technical solution, the lifting cylinder, controlled by the external control panel, works with the connecting frame to drive the lifting frame to rise or fall. The guide rail can effectively improve the stability of the lifting frame during the lifting process, thereby improving the stability of the first threaded rod and the second threaded rod during the thread detection process.

[0024] The beneficial effects of the present invention are as follows: (1) The present invention, through the combined use of the angle adjustment mechanism and the first thread detection mechanism, can drive the four sets of first thread rods to flexibly adjust their angles so that they can accurately adapt to the four sets of fixed thread holes in a rectangular or square layout. Compared with traditional workshop equipment that adapts to a single shape layout, this design does not require frequent equipment replacement or workstation adjustment, significantly improving the compatibility of the equipment with different products and effectively reducing the time loss and labor costs caused by equipment conversion; (2) The present invention, through the combined use of the telescopic mechanism and the second thread detection mechanism, allows the two sets of second thread rods in the descending state to work in coordination with the original four sets of first thread rods, which can accurately cover the thread detection in the hexagonal fixed thread hole. This modular and expandable design breaks the limitation of traditional detection equipment on specific shapes, making the equipment more versatile. The equipment can meet the increasingly diversified product needs of the automotive manufacturing industry, effectively reduce the high costs incurred by enterprises due to the purchase of various special testing equipment, and improve the comprehensive use value of the equipment; (3) The present invention can stably clamp and position the automotive ball bearing hub unit through the positioning mechanism, fundamentally avoiding the problem of test data deviation caused by the movement and shaking of the hub unit during the test process, reducing the situation of unqualified products flowing out or qualified products being misjudged due to test errors; (4) The present invention uses the lifting platform mechanism to powerfully blow the inside of the fixed screw hole, quickly remove the debris, oil and other impurities remaining in the fixed screw hole, create a clean test environment, avoid impurities affecting the test accuracy of the screw rod on the screw thread inside the screw hole, ensure that the data obtained by the test equipment is accurate and reliable, and comprehensively improve the quality and efficiency of the test work. Attached Figure Description

[0025] Figure 1 This is a first-view structural diagram of the present invention.

[0026] Figure 2 This is a second-view structural diagram of the present invention.

[0027] Figure 3 This is a third-view structural diagram of the present invention.

[0028] Figure 4 This is a three-dimensional schematic diagram of the lifting frame of the present invention.

[0029] Figure 5 This is a first-view structural diagram of the lifting frame and two sets of thread detection mechanisms of the present invention.

[0030] Figure 6 This is a second-view structural diagram of the lifting frame and two sets of thread detection mechanisms of the present invention.

[0031] Figure 7 This is a first-view structural diagram showing the connection between the angle adjustment mechanism and the first thread detection mechanism of the present invention.

[0032] Figure 8This is a second-view structural diagram showing the connection between the angle adjustment mechanism and the first thread detection mechanism of the present invention.

[0033] Figure 9 This is a first-view structural diagram showing the separation of the angle adjustment mechanism and the first thread detection mechanism of the present invention.

[0034] Figure 10 This is a second-view structural diagram showing the separation of the angle adjustment mechanism and the first thread detection mechanism of the present invention.

[0035] Figure 11 This is a partial structural schematic diagram of the angle adjustment mechanism of the present invention.

[0036] Figure 12 This is a three-dimensional schematic diagram of the detection bracket of the present invention.

[0037] Figure 13 This is a schematic diagram showing the connection between the telescopic mechanism and the second thread detection mechanism of the present invention.

[0038] Figure 14 This is a first-view structural diagram of the lifting platform mechanism of the present invention.

[0039] Figure 15 This is a second-view structural diagram of the lifting platform mechanism of the present invention.

[0040] Figure 16 This is a third-view structural diagram of the lifting platform mechanism of the present invention.

[0041] Figure 17 This is a first-view structural diagram of the positioning mechanism of the present invention.

[0042] Figure 18 This is a second-view structural diagram of the positioning mechanism of the present invention.

[0043] Figure 19 This is a three-dimensional schematic diagram of the lifting and adjusting mechanism of the present invention.

[0044] Reference numerals: 1. Lifting frame; 2. Drive mechanism; 201. First servo motor; 202. L-shaped bracket; 203. Reduction gear set; 204. Drive wide gear; 3. Detection bracket; 4. Angle adjustment mechanism; 401. Movable frame; 402. Lead screw; 403. Moving block; 404. Connecting rod; 405. Driven gear; 406. Second servo motor; 407. Drive gear; 5. First thread detection mechanism; 501. First rotating shaft; 502. First torque sensor; 503. First threaded rod; 504. Arc-shaped through groove; 505. First transmission gear; 6. Telescopic mechanism; 601. Slide rod; 602. Connecting plate; 603. Electric push rod; 604. Lifting rod; 7. Second thread detection mechanism; 701. 702. Second torque sensor; 703. Second rotating shaft; 704. Second transmission gear; 705. Second threaded rod; 8. Lifting platform mechanism; 806. Support frame; 807. Lifting cylinder; 808. Placement platform; 809. Guide shaft; 8000. Positioning pin; 8001. Dust removal assembly; 8002. Air tank; 8003. Solenoid valve; 8004. Ring tube; 8005. Air nozzle; 9. Positioning mechanism; 901. Mounting column; 902. Sleeve; 903. Retaining ring; 904. Collar; 905. Return spring; 906. Positioning spindle; 907. Distance sensor; 10. Lifting adjustment mechanism; 1001. Fixing frame; 1002. Lifting cylinder; 1003. Guide rail; 1004. Connecting frame. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0046] like Figures 1-6 , Figure 12 and Figure 19As shown, this embodiment of a workshop equipment for inspecting the threads of automotive ball bearing hub units includes a lifting frame 1 as a mounting carrier and a lifting adjustment mechanism 10 for controlling the lifting of the lifting frame 1. A drive mechanism 2 is provided on the top inner side of the lifting frame 1, and a detection bracket 3 is installed on the inner side of the lifting frame 1. The drive mechanism 2 includes an L-shaped bracket 202 located on the top inner side of the detection bracket 3. A reduction gear set 203 is installed on the top of the L-shaped bracket 202. A first servo motor 201 is installed on the top of the detection bracket 3, and the output end of the first servo motor 201 is connected to the input end of the reduction gear set 203. A drive wide gear 204 is installed on the output end of the reduction gear set 203. The lifting adjustment mechanism 10 includes a fixed frame 1001 located at one end of the lifting frame 1. One end of the fixed frame 1001 is movably connected to the lifting frame 1 via a guide rail 1003. A lifting cylinder 1002 is installed at the top, and the lifting cylinder 1002 drives the lifting frame 1 to rise and fall through the connecting frame 1004. The first servo motor 201, in conjunction with the reduction gear set 203, drives the drive wide gear 204 to rotate. Since the reduction gear set 203 reduces the speed of the first servo motor 201, the drive wide gear 204 can rotate slowly and uniformly, which helps to improve the stability of the threaded rod rotating into the fixing screw hole of the automotive ball bearing hub unit. After the first threaded rod 503 and the second threaded rod 704 have completely rotated into the fixing screw hole of the automotive ball bearing hub unit, the lifting cylinder 1002 is controlled to stop driving the lifting frame 1 to descend. Then, the lifting cylinder 1002 is controlled to drive the lifting frame 1 to rise slowly, so that the first threaded rod 503 and the second threaded rod 704 rise together, so that the operator can replace the next set of automotive ball bearing hub units to be tested.

[0047] like Figures 7-12As shown, in this embodiment, the top and inner bottom of the detection bracket 3 are both provided with an angle adjustment mechanism 4. The inside of the detection bracket 3 is provided with a first threaded detection mechanism 5 that cooperates with the angle adjustment mechanism 4. The angle adjustment mechanism 4 includes a second servo motor 406 located on one side inside the detection bracket 3 and a drive gear 407 at the output end of the second servo motor 406. A pair of movable frames 401 are fixedly hinged to the top and inner bottom of the detection bracket 3, and the fixed axis is on the same vertical line as the axis that drives the wide gear 204 to rotate. Both the top and inner bottom of the detection bracket 3 are provided with lead screws 402. At the same end of both sets of lead screws 402, a driven gear 405 that meshes with the drive gear 407 is installed. The outer side of the lead screw 402... A threaded movable block 403 is provided, and connecting rods 404 are symmetrically hinged on both sides of the movable block 403. The end of the connecting rod 404 away from the movable block 403 is respectively hinged to the same end of two adjacent sets of movable frames 401. The first thread detection mechanism 5 includes two sets of arc-shaped through slots 504 symmetrically opened at the top and bottom of the detection bracket 3. Four sets of first transmission gears 505 that mesh with the drive wide gear 204 are provided above the detection bracket 3. The inner ring of the first transmission gear 505 is equipped with a first rotating shaft 501. Two sets of first torque sensors 502 that are fixedly connected to the adjacent movable frames 401 are sequentially provided at the bottom end of the first rotating shaft 501. The two sets of first torque sensors 502 are connected by a coupling. The bottom set of first torque sensors 502 is connected by a coupling. A torque sensor 502 has a first threaded rod 503 mounted on its bottom end. This controls a second servo motor 406, which, in conjunction with a drive gear 407 and two sets of driven gears 405, drives two sets of lead screws 402 to rotate synchronously and uniformly. The threaded action forces the moving block 403 on the lead screw 402 to move. The moving block 403, through two sets of connecting rods 404, pushes two sets of hinged movable frames 401 to rotate around their hinge axis, thereby adjusting the angle between the two sets of movable frames 401. This allows for precise adjustment of the position of the four sets of first threaded rods 503, enabling them to perform thread detection on four sets of fixed screw holes with different layouts on the automotive ball bearing hub unit. Furthermore, the four sets of first transmission gears 505 always maintain contact with the drive... Wide gears 204 mesh with each other. When the first servo motor 201 drives the wide gears 204 to rotate at a constant speed, the wide gears 204 drive the first rotating shaft 501 to rotate through the first transmission gear 505. This, in turn, drives the rotating shafts of the upper and lower sets of first torque sensors 502 and the first threaded rod 503 to rotate synchronously. The outer sides of the upper and lower sets of first torque sensors 502 are fixedly connected to the adjacent movable frame 401 at the bottom. This ensures that when the movable frame 401 rotates, the first rotating shaft 501, the first torque sensor 502, the first threaded rod 503, and the first transmission gear 505 rotate together around the hinge axis of the two sets of movable frames 401. During this process, the first rotating shaft 501 moves within the arc-shaped through groove 504.Two sets of connected first torque sensors 502 monitor the change in torsional torque during the rotation of the first threaded rod 503 in real time, thereby determining whether the thread detected by the first threaded rod 503 is qualified.

[0048] like Figures 1-3 and Figure 13 As shown, in this embodiment, the detection bracket 3 has a telescopic mechanism 6 on both sides, and a second thread detection mechanism 7 that cooperates with the first thread detection mechanism 5 is provided on the inner side of the telescopic mechanism 6. The telescopic mechanism 6 includes a connecting plate 602 located above the L-shaped bracket 202. Two sets of sliding rods 601 fixedly connected to the top of the lifting frame 1 are installed on the top of the L-shaped bracket 202, and the two sets of sliding rods 601 pass through the connecting plate 602. Lifting rods 604 are symmetrically installed on both sides of the bottom of the connecting plate 602 away from the lifting frame 1. The lifting rods 604 pass through the detection mechanism 602. The bracket 3 extends below the detection bracket 3. An electric push rod 603 for lifting the drive connecting plate 602 is installed on the top of the lifting frame 1. The second thread detection mechanism 7 includes two sets of second transmission gears 703 located above the detection bracket 3. A second rotating shaft 702 is installed on the inner ring of the second transmission gear 703, and two sets of second torque sensors 701 fixedly connected to the lifting rod 604 are sequentially arranged at the bottom end of the second rotating shaft 702. The two sets of second torque sensors 701 are connected by a coupling. The bottom two sets of second torque sensors 701... Each end is equipped with a second threaded rod 704. The electric push rod 603 controls the connecting plate 602 to descend. During this process, the connecting plate 602 slides on two sets of sliding rods 601. The two sets of lifting rods 604 at the bottom of the connecting plate 602 also drive the second thread detection mechanism 7 to descend, ensuring that the bottom end of the second threaded rod 704 in the second thread detection mechanism 7 is on the same horizontal plane as the bottom ends of the other four sets of first threaded rods 503. Then, the electric push rod 603 controls the lifting rods 604 to descend, and even as the height decreases, the second transmission gear 703 remains aligned with... The drive wide gear 204 is kept in a meshed state. When the drive wide gear 204 rotates, it will also drive the second rotating shaft 702, the rotating shafts of the two sets of second torque sensors 701, and the second threaded rod 704 to rotate synchronously through the second transmission gear 703. The second threaded rod 704 and the first threaded rod 503 have the same rotation direction and rotation speed. The second torque sensor 701 can monitor the change of torsional torque during the rotation of the second threaded rod 704 in real time, and then determine whether the thread detected by the second threaded rod 704 is qualified.

[0049] In this process, one set of second threaded rods 704 and two sets of first threaded rods 503 on the same side can be manually disassembled. At this time, the remaining two sets of first threaded rods 503 and one set of second threaded rods 704 can perform thread detection on the fixed screw holes with a triangular layout. Furthermore, by controlling the included angle between the two sets of movable frames 401 that are hinged to each other, the entire device can also perform thread detection on fixed screw holes with different triangular layouts.

[0050] like Figures 1-3 and Figures 14-18 As shown, in this embodiment, a lifting platform mechanism 8 for placing automotive ball bearing hubs is provided below the testing bracket 3. A positioning mechanism 9 cooperating with the lifting platform mechanism 8 is provided at the bottom of the testing bracket 3. The lifting platform mechanism 8 includes a support frame 801 located directly below the testing bracket 3. A lifting cylinder 802 is installed at the middle position of the top of the support frame 801, and the output end of the lifting cylinder 802 extends to the top of the support frame 801 and is equipped with a platform 803. Guide shafts 804 extending into the support frame 801 are installed at the four corners of the bottom of the platform 803. A positioning pin 805 is installed at a non-center position of the top of the platform 803. The positioning mechanism 9 includes a positioning spindle 906 located at the middle position of the top of the platform 803. An installation column 9 is installed at the middle position of the bottom of the testing bracket 3. 01, and the outer side of the mounting column 901 is fitted with a sleeve 902 and a retaining ring 903 that are connected to each other. The bottom of the retaining ring 903 is fitted with a collar 904 that is compatible with the positioning spindle 906. The top of the outer side of the mounting column 901 is fitted with a return spring 905, and the top and bottom of the return spring 905 are fixedly connected to the detection bracket 3 and the sleeve 902 respectively. The positioning spindle 906 is equipped with a distance sensor 907 that cooperates with the mounting column 901. After the positioning hole on the automotive ball bearing hub unit to be tested is aligned with the positioning pin 805 and inserted, so that the automotive ball bearing hub unit is fitted on the outer side of the positioning spindle 906, the lifting cylinder 802 is controlled to push the platform 803 to the highest position. During the process, the guide shaft 804 rises along with it to ensure the stability of the platform 803 during the lifting process.

[0051] As the lifting frame 1 descends, the mounting post 901 first inserts into the positioning spindle 906, serving as a guide. Then, the bottom of the retaining ring 903 gradually presses against the top of the automotive ball bearing hub unit, working with the platform 803 to clamp and fix the automotive ball bearing hub unit. When the first threaded rod 503 descends and gradually rotates into the fixing screw hole of the automotive ball bearing hub unit, the collar 904, retaining ring 903, and sleeve 902 slide upwards on the outside of the mounting post 901. The return spring 905 is compressed and stores elastic potential energy. After the first threaded rod 503 is fully rotated into the screw hole of the automotive ball bearing hub unit, the distance sensor 907, in conjunction with the mounting post 901, transmits a signal to the external control panel. The external control panel then controls the lifting cylinder 1002 to stop driving the lifting frame 1 to descend.

[0052] Next, the lifting cylinder 1002 is controlled to drive the lifting frame 1 to rise slowly, and the first servo motor 201 is controlled to work with the reduction gear set 203 to drive the drive wide gear 204 to rotate counterclockwise at a uniform speed, so that the first thread rod 503 and the second thread rod 704 leave the four sets of fixed thread holes of the automotive ball bearing hub unit. Before the thread of the automotive ball bearing hub unit is tested, the fixed thread holes of the automotive ball bearing hub unit can be cleaned by air jet using the dust cleaning component 806 to ensure the accuracy of the equipment in testing the thread inside the fixed thread holes.

[0053] like Figures 14-16 As shown, a dust removal assembly 806 is provided on the inner top of the support frame 801. The dust removal assembly 806 includes an air pump 8061 and an air tank 8062 located inside the support frame 801. The output end of the air pump 8061 is connected to the interior of the air tank 8062. An annular pipe 8064 is provided on the top of the platform 803, and air nozzles 8065 are evenly arranged on the top of the annular pipe 8064. The air tank 8062 is connected to the interior of the annular pipe 8064 through a solenoid valve 8063. (The last sentence appears to be incomplete and possibly refers to a specific part of the assembly.) When the bottom of 03 gradually touches the top of the automotive ball bearing hub unit, the control solenoid valve 8063 opens for a period of time and then closes, allowing the high-pressure air in the air tank 8062 to enter the annular pipe 8064, and then the jet nozzle 8065 sprays air to clean the inside of the fixing screw hole of the automotive ball bearing hub unit, ensuring the equipment's detection accuracy of the screw threads inside the fixing screw hole. During the period when the operator replaces the automotive ball bearing hub unit, the air pump 8061 is controlled to replenish the high-pressure gas to the air tank 8062.

[0054] The working principle of this embodiment is as follows: First, the position of the four sets of first threaded rods 503 is adjusted according to the layout of the fixed screw holes on the automotive ball bearing hub unit to be detected. The second servo motor 406 is controlled to drive the drive gear 407 to rotate. The drive gear 407 and the driven gear 405 drive the two sets of lead screws 402 to rotate synchronously. Then, the moving block 403 cooperates with the connecting rod 404 to adjust the included angle between the two sets of movable frames 401 that are hinged to each other, so that the position of the four sets of first threaded rods 503 can be located directly above the fixed screw holes on the automotive ball bearing hub unit. If the fixed screw holes on the automotive ball bearing hub unit are in a regular hexagonal layout, the included angle between the two sets of movable frames 401 that are hinged to each other is first controlled to be 60°. Then, the electric push rod 603 is controlled to drive the connecting plate 602 and the lifting rod 604 to descend, so that the bottom ends of the two sets of second threaded rods 704 and the bottom ends of the four sets of first threaded rods 503 are on the same plane.Next, align the positioning hole on the automotive ball bearing hub unit to be tested with the positioning pin 805 and insert it so that the automotive ball bearing hub unit is fitted onto the outside of the positioning spindle 906. Then, control the lifting cylinder 802 via the external control panel to push the platform 803 to the highest position. At the same time, control the lifting cylinder 1002 to drive the lifting frame 1 to slowly descend. The mounting post 901 is first inserted into the positioning spindle 906, and then the bottom of the retaining ring 903 gradually abuts against the top of the automotive ball bearing hub unit. Then, control the solenoid valve 8063 to open for a period of time and then close it, allowing the high-pressure air in the air tank 8062 to enter the annular... After passing through pipe 8064, the nozzle 8065 cleans the inside of the fixing screw hole of the automotive ball bearing hub unit by air jet cleaning. Then, the first threaded rod 503 or the first threaded rod 503 and the second threaded rod 704 gradually enter the fixing screw hole of the automotive ball bearing hub unit. Next, the first servo motor 201, in conjunction with the reduction gear set 203, drives the drive wide gear 204 to rotate clockwise at a uniform speed. The drive wide gear 204, through the transmission of the first transmission gear 505 and the second transmission gear 703, drives the first threaded rod 503 and the second threaded rod 704 to rotate synchronously and uniformly. During the rotation of the two threaded rods 704 into the threaded holes of the automotive ball bearing hub unit, the first torque sensor 502 and the second torque sensor 701 monitor the changes in torsional torque during the rotation of the first threaded rod 503 and the second threaded rod 704 in real time, and transmit the signals to the external control panel. If the changes in torsional torque during the rotation of the first threaded rod 503 and the second threaded rod 704 do not meet expectations, it indicates that the threads in the corresponding fixing threaded holes on the automotive ball bearing hub unit are not up to standard. This is necessary when the first threaded rod 503 and the second threaded rod 704 are fully rotated into the fixing threaded holes of the automotive ball bearing hub unit. Afterwards, the distance sensor 907, in conjunction with the mounting post 901, transmits the signal to the external control panel. The external control panel then controls the lifting cylinder 1002 to stop lowering the lifting frame 1. Immediately afterwards, it controls the lifting cylinder 1002 to slowly raise the lifting frame 1, and simultaneously controls the first servo motor 201, in conjunction with the reduction gear set 203, to drive the drive wide gear 204 to rotate counterclockwise at a uniform speed. This causes the first threaded rod 503 and the second threaded rod 704 to disengage from the four sets of fixing screw holes of the automotive ball bearing hub unit. Finally, the inspected automotive ball bearing hub unit is removed and replaced with the next set to be inspected.

[0055] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention.

Claims

1. A workshop device for detecting the thread of a car ball bearing hub unit, comprising a lifting frame (1) as a mounting carrier and a lifting adjustment mechanism (10) for controlling the lifting of the lifting frame (1), characterized in that: The top of the inner side of the lifting frame (1) is provided with a driving mechanism (2), and the inner side of the lifting frame (1) is provided with a detection support (3); The top and the inner bottom of the detection support (3) are provided with an angle adjusting mechanism (4), the inside of the detection support (3) is provided with a first screw detection mechanism (5) matched with the angle adjusting mechanism (4), the two sides of the detection support (3) are provided with an extension mechanism (6), and the inner side of the extension mechanism (6) is provided with a second screw detection mechanism (7) matched with the first screw detection mechanism (5); The detection support (3) is provided below with a lifting platform mechanism (8) for placing an automobile ball bearing hub, and the bottom of the detection support (3) is provided with a positioning mechanism (9) matched with the lifting platform mechanism (8); The driving mechanism (2) comprises an L-shaped support (202) located at the top of the inner side of the detection support (3), a reduction gear set (203) is installed at the top of the L-shaped support (202), a first servo motor (201) is installed at the top of the detection support (3), and the output end of the first servo motor (201) is connected with the input end of the reduction gear set (203), and a driving wide gear (204) is installed at the output end of the reduction gear set (203); The angle adjusting mechanism (4) comprises a second servo motor (406) located at one side of the inside of the detection support (3) and a driving gear (407) at the output end of the second servo motor (406), a pair of movable frames (401) are hinged at the top and the inner bottom of the detection support (3) in a fixed shaft manner, and the shaft centers of the fixed shafts are on the same vertical line as the shaft center of the driving wide gear (204), a lead screw (402) is arranged at the top and the inner bottom of the detection support (3), the same end of the two groups of lead screws (402) is provided with a driven gear (405) matched with the driving gear (407), a moving block (403) is arranged on the outer side of the lead screw (402) in a threaded manner, and the two sides of the moving block (403) are symmetrically hinged with connecting rods (404), and the ends, away from the moving block (403), of the connecting rods (404) are respectively hinged with the same ends of the adjacent two groups of movable frames (401); The first screw detection mechanism (5) comprises two groups of arc-shaped through grooves (504) symmetrically formed at the top and the bottom of the detection support (3), four groups of first transmission gears (505) matched with the driving wide gear (204) are arranged above the detection support (3), a first rotating shaft (501) is installed at the inner ring of the first transmission gear (505), two groups of first torque sensors (502) fixedly connected with the adjacent movable frames (401) are sequentially arranged at the bottom end of the first rotating shaft (501), the two groups of first torque sensors (502) are connected through a shaft coupling, and the bottom end of the first torque sensor (502) of the bottom group is provided with a first screw rod (503).

2. A shop floor apparatus for detecting threads of a ball bearing hub unit of an automobile wheel according to claim 1, characterized in that, The telescopic mechanism (6) comprises a connecting plate (602) above an L-shaped support (202), two groups of slide rods (601) fixedly connected to the top of the lifting frame (1) are installed on the top of the L-shaped support (202), the two groups of slide rods (601) penetrate through the connecting plate (602), two lifting rods (604) are symmetrically installed on the bottom of the connecting plate (602) away from one end of the lifting frame (1), the lifting rods (604) penetrate through the detection support (3) and extend below the detection support (3), and the top of the lifting frame (1) is provided with an electric push rod (603) for driving the lifting of the connecting plate (602).

3. A shop floor apparatus for detecting threads of a ball bearing hub unit of an automobile wheel according to claim 2, characterized in that, The second thread detection mechanism (7) comprises two groups of second transmission gears (703) above the detection support (3), a second rotating shaft (702) is installed on the inner ring of the second transmission gear (703), two groups of second torque sensors (701) are fixedly connected to the bottom end of the second rotating shaft (702) in sequence, the two groups of second torque sensors (701) are connected through a shaft coupling, and the bottom ends of the two groups of second torque sensors (701) are provided with second thread rods (704).

4. The shop equipment for detecting the thread of the automobile ball bearing hub unit according to claim 1, wherein The lifting platform mechanism (8) comprises a support frame (801) below the detection support (3), a jacking cylinder (802) is installed at the middle position of the inner top of the support frame (801), an object placing table (803) is installed above the support frame (801) through the output end of the jacking cylinder (802), guide shafts (804) extending into the support frame (801) are installed at the four corners of the bottom of the object placing table (803), a positioning pin (805) is installed at a non-central position of the top of the object placing table (803), and a dust removal assembly (806) is arranged on the inner top of the support frame (801).

5. A shop floor apparatus for detecting threads of a ball bearing hub unit of an automobile wheel according to claim 4, wherein The dust removal assembly (806) comprises an air charging pump (8061) and an air storage tank (8062) in the support frame (801), the output end of the air charging pump (8061) is in communication with the inside of the air storage tank (8062), an annular pipe (8064) is arranged on the top of the object placing table (803), gas injection nozzles (8065) are uniformly arranged on the top of the annular pipe (8064), and the air storage tank (8062) is in communication with the inside of the annular pipe (8064) through an electromagnetic valve (8063).

6. The shop equipment for detecting the thread of the automobile ball bearing hub unit according to claim 4, wherein The positioning mechanism (9) comprises a positioning main shaft (906) located at the middle of the top of the placement table (803), an installation column (901) is installed at the middle of the bottom of the detection support (3), an outer side of the installation column (901) is sleeved with a sleeve (902) and a stop ring (903) which are connected with each other, a sleeve ring (904) which is matched with the positioning main shaft (906) is installed at the bottom of the stop ring (903), a reset spring (905) is sleeved at the top of the outer side of the installation column (901), and the top and the bottom of the reset spring (905) are fixedly connected with the detection support (3) and the sleeve (902) respectively, and the inside of the positioning main shaft (906) is provided with a distance sensor (907) which cooperates with the installation column (901).

7. The shop equipment for detecting threads of an automobile ball bearing hub unit according to claim 1, wherein The lifting adjusting mechanism (10) comprises a fixed frame (1001) located at one end of the lifting frame (1), one end of the fixed frame (1001) is movably connected with the lifting frame (1) through a guide rail (1003), a lifting cylinder (1002) is installed at the top of the fixed frame (1001), and the lifting cylinder (1002) drives the lifting frame (1) to lift through a connecting frame (1004).

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