A differential comprehensive test bench and method

Abstract

The present invention is applicable to the technical field of speed reducer development, and provides a differential comprehensive test bench and method, including a chassis assembly, the chassis assembly includes a workbench; a drive assembly arranged on the chassis assembly for testing the differential, the drive assembly includes a drive head, the drive head is an external spline, and cooperates with the internal spline of the differential input end; a group of button boxes all installed on one side of the workbench; a positioning and clamping tooling arranged on the workbench for positioning the differential; a photoelectric sensor assembly and a reflector both installed on the top of the workbench for detecting whether the differential is correctly positioned and clamped, the photoelectric sensor assembly and the reflector are arranged relative to each other. The differential comprehensive test bench provided by this scheme not only realizes accurate, efficient and automated detection of differential performance, but also improves the convenience of operation, the traceability of data management and the safety of the test process.

Description

Technical Field

[0001] The invention belongs to the technical field of speed reducer development, and in particular relates to a differential comprehensive test bench and method. Background Art

[0002] After the differential is assembled, it is impossible to determine whether the assembly performance meets the technical requirements. There are currently two detection methods: one is to rely on the experience of the assembly master to manually rotate the two output ends of the differential to feel whether the differential runs smoothly; the other is to use a handheld torque wrench to manually measure the differential starting torque.

[0003] The existing detection method relies on the assembly master to manually rotate the two output ends of the differential to determine whether the differential is qualified. It is difficult to achieve uniform rotation by manual rotation and it is impossible to know the starting torque during rotation. Even if a torque wrench with a digital display function is used, although it can display the starting torque during rotation, it still cannot achieve uniform rotation. In addition, the detection method has complex operation steps, poor accuracy, and low detection efficiency. Summary of the invention

[0004] The present invention provides a differential comprehensive test bench and method, aiming to solve the problem raised in the above background technology that most current differential detection methods are difficult to achieve uniform rotation, resulting in poor detection accuracy and low efficiency.

[0005] To solve the above problems, the present invention is implemented as follows: a differential comprehensive test bench, comprising: a chassis assembly, the chassis assembly including a workbench; a drive assembly arranged on the chassis assembly for testing the differential, the drive assembly including a drive head, the drive head is an external spline, and cooperates with the internal spline of the differential input end; a group of button boxes all installed on one side of the workbench; a positioning and clamping tool arranged on the workbench for positioning the differential; a photoelectric sensor assembly and a reflector both installed on the top of the workbench for detecting whether the differential is correctly positioned and clamped, the photoelectric sensor assembly and the reflector being arranged opposite to each other; a correction mechanism arranged on the workbench for correcting the drive head.

[0006] Preferably, the top of the workbench is equipped with an oil pan, which is located on one side of the positioning and clamping tooling. The oil pan is used to collect lubricating oil leaked after the differential is tested. A group of button boxes respectively use three-hole and single-hole button boxes.

[0007] Preferably, the base frame assembly also includes a shell, an electrical cabinet, a touch screen and a warning light, the workbench is installed on the shell, the electrical cabinet is installed on one side of the shell, the touch screen is arranged on the top of the shell, and the warning light is installed on the top of the outer shell of the touch screen.

[0008] Preferably, the driving component also includes a detection component, a connecting rod and a driving shaft. The detection component is composed of a servo motor, a reducer and a dynamic torque sensor. The servo motor and the reducer are both installed in the housing. The output shaft of the servo motor is connected to the reducer. The dynamic torque sensor is arranged on the reducer. The connecting rod is arranged above the dynamic torque sensor. The driving shaft is arranged above the connecting rod. The two ends of the driving shaft are respectively connected to the driving head and the dynamic torque sensor.

[0009] Preferably, the driving assembly is further provided with a driving fixed seat, a positioning sleeve, a shaft sleeve, a sensing column and a proximity switch, the driving fixed seat is arranged in the shell, the driving shaft passes through the driving fixed seat, the positioning sleeve is arranged on the top of the driving fixed seat, the shaft sleeve is sleeved on the driving shaft and connected to the positioning sleeve, the sensing column is installed on the driving fixed seat, and the proximity switch is arranged on one side of the sensing column.

[0010] Preferably, the correction mechanism includes an arc plate, a group of clamping blocks, a support frame and a group of photoelectric detection equipment. The arc plate is arranged above the workbench, a group of clamping blocks are arranged on the arc plate for clamping and fixing the differential, the support frame is slidably arranged on the top of the workbench, a connecting port is opened on the workbench, and the connecting port is located directly above the drive shaft. A group of photoelectric detection equipment are respectively installed on both sides of the support frame, and the photoelectric detection equipment located below is arranged opposite to the drive shaft.

[0011] Preferably, a U-shaped plate is provided above the workbench, the U-shaped plate is located on one side of the arc-shaped plate, a group of electric telescopic rods are installed on the arc-shaped plate, the output rods of a group of electric telescopic rods are respectively fixedly connected to a group of clamping blocks, and anti-slip pads are fixedly installed on a group of clamping blocks.

[0012] Preferably, a support plate is fixedly installed on the top of the workbench, a connecting box is fixedly installed on the top of the support plate, a one-way screw is rotatably installed in the connecting box, a slider is threadedly sleeved on the one-way screw, the slider is fixedly connected to the arc plate, a rotating rod is rotatably installed on the bottom of the support plate, the bottom ends of the rotating rod and the one-way screw are fixedly sleeved with a first bevel gear, the two first bevel gears are meshed with each other, a small motor is fixedly installed on one side of the connecting box, the output shaft of the small motor and the rotating rod are fixedly sleeved with a second bevel gear, the two second bevel gears are meshed with each other.

[0013] Preferably, a threaded rod is rotatably installed on the top of the workbench, and the threaded rod is threadedly connected to the support frame. A sprocket is fixedly installed on one end of the threaded rod and the rotating rod. Chains are sleeved on the two sprockets, and the chain is meshed with the two sprockets. The positioning and clamping tool consists of a cylinder and a fixing pin. The cylinder is fixedly installed on the top of the workbench and is located on one side of the connecting port. The fixing pin is installed on the output rod of the cylinder. A positioning pin is fixedly installed on the top of the workbench, and the positioning pin is slidably connected to the threaded hole of the flange on the differential.

[0014] Preferably, the U-shaped plate is provided with an adjustment mechanism for adjusting the position of the threaded hole of the flange on the differential, and the adjustment mechanism includes a positioning sensor, a driving gear, an arcuate rack, a second electric telescopic rod and a driving rack, the positioning sensor is fixedly mounted on the support frame, the driving gear is rotatably mounted in the U-shaped plate, the arcuate rack is fixedly mounted on one side of the arcuate plate, the arcuate rack is meshed with the driving gear, the second electric telescopic rod is fixedly mounted in the U-shaped plate, the driving rack is mounted on the output rod of the second electric telescopic rod, and the driving rack is meshed with the driving gear.

[0015] Preferably, two guide blocks are fixedly installed in the U-shaped plate, and the two guide blocks are slidably connected to the driving rack and the arc-shaped rack respectively.

[0016] On the other hand, a method for using a differential integrated test bench is provided, comprising the following steps:

[0017] Step 1: First, power on the equipment and start the entire detection system. After the system starts, immediately check whether there is an alarm signal. If an alarm signal is detected, proceed to the next step; if not, continue normal operation.

[0018] After ensuring that the equipment is fault-free and the air pressure and servo motor are normal, the system starts waiting to receive the material picking signal.

[0019] Positioning, clamping and starting: Once the material picking signal is received, the system will automatically clamp the differential through the clamping block, and correct the drive head through the correction mechanism to align the internal spline teeth of the differential with the tooth grooves of the drive head. After alignment, the differential will be placed on the positioning pin and clamped by the positioning clamping tooling to prepare for the subsequent rotation of the differential;

[0020] Step 2: Alarm processing:

[0021] Manual reset attempt: First try a manual reset to eliminate possible faults.

[0022] Manual / automatic selection: If manual reset is invalid, it switches to automatic mode and the system automatically handles the alarm.

[0023] Air pressure and motor check: In automatic mode, the system will check whether the air pressure is normal and whether the servo motor can operate normally, which is a key step to ensure the smooth operation of subsequent operations;

[0024] Step 3: Differential rotation and timing:

[0025] Constant speed: The system activates the differential at a constant speed to ensure stable operation.

[0026] Forward and reverse timing: The differential will perform forward and reverse operations according to the set time (for example, forward seconds, reverse seconds) to test the performance of the differential.

[0027] Waiting for the output of the material taking signal: After completing the forward and reverse operation, the system will wait for the output of the material taking signal so that the differential can be removed from the equipment;

[0028] Step 4: Fault standby and processing:

[0029] Failure Standby: If a failure or error occurs in any step, the system will immediately enter the Failure Standby state to prevent further damage.

[0030] Solution: Check the air pressure and start the servo motor to troubleshoot and repair the problem. If the problem cannot be solved, contact the manufacturer for further repairs.

[0031] Compared with the related art, the differential comprehensive test bench provided by the present invention has the following beneficial effects:

[0032] Compared with the prior art, the differential integrated test bench provided by the present solution provides real-time monitoring of constant speed and dynamic torque sensor through the servo motor in the drive assembly, which can accurately evaluate the starting torque and running smoothness of the differential, improve the accuracy and reliability of detection, and the automated test process reduces the reliance on manual operation, shortens the detection time, and improves the detection efficiency. The use of the photoelectric sensor assembly and the reflector ensures the correct positioning and clamping of the differential before the test, avoids the test error caused by position deviation, and enhances the reliability of detection. Through the setting of the correction mechanism, the alignment between the differential output shaft and the drive head can be monitored and adjusted in real time to ensure the correct correspondence between the tooth groove and the tooth teeth, avoiding installation problems caused by misalignment. Through the cooperation of the positioning sensor, the driving gear, the arc rack and the second electric telescopic rod, it can ensure that the position of the threaded hole of the flange on the differential corresponds to the expected position, and realizes the precise adjustment of the position of the threaded hole of the flange on the differential.

[0033] In summary, the differential integrated test bench of the present invention not only realizes accurate, efficient and automated detection of differential performance, but also improves the convenience of operation, traceability of data management and safety of the test process. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a schematic diagram of the main cross-sectional structure of a differential comprehensive test bench provided by the present invention;

[0035] Figure 2 It is a side view structural schematic diagram of a differential comprehensive test bench provided by the present invention;

[0036] Figure 3 This is a schematic diagram of the main structure of a differential integrated test bench provided by the present invention during operation;

[0037] Figure 4 It is a partial top view structural schematic diagram of a differential comprehensive test bench provided by the present invention;

[0038] Figure 5 It is a three-dimensional structural schematic diagram of a chassis assembly of a differential comprehensive test bench provided by the present invention;

[0039] Figure 6 It is a cross-sectional structural schematic diagram of a drive assembly of a differential comprehensive test bench provided by the present invention;

[0040] Figure 7 It is a main working schematic diagram of the deviation correction mechanism and the differential provided by the present invention;

[0041] Figure 8 It is a side view cross-sectional working schematic diagram of the deviation correction mechanism and the differential provided by the present invention;

[0042] Fig. 9 It is a top view and cross-sectional working schematic diagram of the middle arc plate, arc rack, driving gear and drive gear provided by the present invention;

[0043] Fig.10 for Figure 8 An enlarged structural diagram of part A shown in FIG.

[0044] Fig.11 The present invention provides a workflow diagram of a differential integrated test bench.

[0045] Figure numerals: 1, chassis assembly; 2, drive assembly; 3, button box; 4, positioning and clamping tooling; 5, photoelectric sensor assembly; 6, reflector; 7, oil tray; 8, workbench; 9, electrical cabinet; 10, touch screen; 11, warning light; 12, servo motor; 13, reducer; 14, dynamic torque sensor; 15, connecting rod; 16, drive shaft; 17, drive head; 18, detection assembly; 19, drive fixing seat; 20, positioning sleeve; 21, shaft sleeve; 22, induction column; 23, proximity switch; 24, correction mechanism; 25, curved plate; 26 , clamping block; 27, supporting frame; 28, photoelectric detection equipment; 29, connecting port; 30, U-shaped plate; 32, first electric telescopic rod; 33, anti-skid pad; 34, supporting plate; 35, connecting box; 36, one-way screw; 37, slider; 38, rotating rod; 39, first bevel gear; 40, small motor; 41, second bevel gear; 42, threaded rod; 43, sprocket; 44, chain; 45, positioning sensor; 46, driving gear; 47, arc rack; 48, second electric telescopic rod; 49, driving rack; 50, guide block; 51, positioning pin. DETAILED DESCRIPTION

[0046] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field of the present application; the terms used in the specification of the application herein are only for the purpose of describing specific embodiments and are not intended to limit the present application; the terms "including" and "having" in the specification and claims of the present application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of the present application or the above-mentioned figures are used to distinguish different objects, rather than to describe a specific order; the terms "inside", "outside", "left", and "right" indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0047] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0048] The embodiment of the present invention provides a differential comprehensive test bench, such as Figure 1-10As shown, the differential comprehensive test bench includes: a chassis assembly 1, the chassis assembly 1 includes a workbench 8; a drive assembly 2 arranged on the chassis assembly 1 for testing the differential, the drive assembly 2 includes a drive head 17, the drive head 17 is an external spline, and cooperates with the internal spline of the differential input end; a group of button boxes 3, all installed on one side of the workbench 8; a positioning and clamping tool 4 for positioning the differential, arranged on the workbench 8; a photoelectric sensor assembly 5 and a reflector 6, both installed on the top of the workbench 8 for detecting whether the differential is correctly positioned and clamped, and the photoelectric sensor assembly 5 and the reflector 6 are arranged opposite to each other; a correction mechanism 24 arranged on the workbench 8 for correcting the drive head 17.

[0049] In this embodiment, the drive assembly 2 is the core part of the test bench, which is mainly composed of a servo motor 12 and a dynamic torque sensor 14. The servo motor 12 provides a constant speed to ensure that the differential runs at a stable speed during the test. The dynamic torque sensor 14 monitors the torque changes transmitted to the differential by the drive head 17 in real time, which is used to evaluate the starting torque and running smoothness of the differential. The drive head 17 is designed as an external spline, which matches the internal spline at the input end of the differential, ensuring that the drive assembly 2 can accurately and stably drive the differential. The button box 3 is used to control the start, stop and other operating functions of the test bench.

[0050] The positioning and clamping fixture 4 is used to fix the differential on the workbench 8 to ensure that the position of the differential remains stable during the test. When the differential is correctly positioned and clamped, the light emitted by the laser transmitter of the photoelectric sensor assembly 5 will be reflected back by the reflector 6. After the photoelectric sensor in the photoelectric sensor assembly 5 receives the reflected light, it confirms that the differential has been correctly installed. Before installing the differential, the position of the drive head 17 is automatically adjusted by the correction mechanism 24 to ensure its perfect alignment with the differential input end, thereby reducing installation misalignment caused by position deviation. The servo motor 12 in the drive assembly 2 provides a constant speed and real-time monitoring of the dynamic torque sensor 14, which can accurately evaluate the starting torque and running smoothness of the differential, improve the accuracy and reliability of the detection, and the automated test process reduces the reliance on manual operation, shortens the detection time, and improves the detection efficiency. The use of the photoelectric sensor assembly 5 and the reflector 6 ensures that the differential is correctly positioned and clamped before the test, avoids test errors caused by position deviation, and enhances the reliability of the detection.

[0051] In a further preferred embodiment of the present invention, an oil collecting pan 7 is installed on the top of the workbench 8, and the oil collecting pan 7 is located on one side of the positioning and clamping tooling 4. The oil collecting pan 7 is used to collect the lubricating oil leaked after the differential is inspected. A group of the button boxes 3 respectively adopts a three-hole button box 3 and a single-hole button box 3.

[0052] In this embodiment, the oil pan 7 is designed to collect the lubricating oil leaked from the differential after being tested to prevent the lubricating oil from contaminating the workbench 8 or the test environment. At the same time, it effectively prevents the leakage and diffusion of the lubricating oil during the static process of the differential, thereby reducing the maintenance cost caused by lubricating oil contamination.

[0053] In a further preferred embodiment of the present invention, the base frame assembly 1 also includes a shell, an electrical cabinet 9, a touch screen 10 and a warning light 11, the workbench 8 is installed on the shell, the electrical cabinet 9 is installed on one side of the shell, the touch screen 10 is arranged on the top of the shell, and the warning light 11 is installed on the top of the outer shell of the touch screen 10.

[0054] In this embodiment, during the inspection process, the assembler only needs to fix the tested differential on the clamp 26 and start the test bench with both hands. The test bench will automatically perform a series of operations such as adjustment, clamping, driving, and inspection, and display the inspection results in real time on the touch screen 10. The touch screen 10 is not only used to display the inspection results, but also supports permanent preservation of the inspection records, and allows the user to export these records for further analysis or archiving. Through the touch screen 10, the assembler can view the inspection results intuitively without manual judgment, which simplifies the operating process and improves the inspection efficiency. The permanent preservation and export functions of the inspection records make data management more convenient, which helps enterprises to establish a complete quality traceability system and improve the level of product quality management. The introduction of the warning light 11 provides additional safety protection for the testing process. During the testing process, if an abnormal situation occurs or the test result is unqualified, the warning light will light up to remind the assembler to pay attention to safety or make necessary adjustments.

[0055] In a further preferred embodiment of the present invention, the drive component 2 also includes a detection component 18, a connecting rod 15 and a drive shaft 16. The detection component 18 is composed of a servo motor 12, a reducer 13 and a dynamic torque sensor 14. The servo motor 12 and the reducer 13 are both installed in the housing. The output shaft of the servo motor 12 is connected to the reducer 13. The dynamic torque sensor 14 is arranged on the reducer 13. The connecting rod 15 is arranged above the dynamic torque sensor 14. The drive shaft 16 is arranged above the connecting rod 15. The two ends of the drive shaft 16 are respectively connected to the drive head 17 and the dynamic torque sensor 14.

[0056] In this embodiment, during the detection process, the servo motor 12 is started and drives the reducer 13 to operate. The reducer 13 transmits power to the drive head 17 through the connecting rod 15 and the drive shaft 16 to drive the differential to operate. The dynamic torque sensor 14 monitors and records the torque value in real time, and transmits the data to the control system for processing and display. Through the coordinated use of the servo motor 12, the reducer 13 and the dynamic torque sensor 14, accurate monitoring and recording of the differential drive torque is achieved, and the accuracy and reliability of the detection are improved. The introduction of the reducer 13 makes the power output of the servo motor 12 more stable, reducing the detection error caused by power fluctuations.

[0057] In a further preferred embodiment of the present invention, the drive assembly 2 is further provided with a drive fixing seat 19, a positioning sleeve 20, a shaft sleeve 21, a sensing column 22 and a proximity switch 23. The drive fixing seat 19 is arranged in the shell, the drive shaft 16 passes through the drive fixing seat 19, the positioning sleeve 20 is arranged on the top of the drive fixing seat 19, the shaft sleeve 21 is sleeved on the drive shaft 16 and connected to the positioning sleeve 20, the sensing column 22 is installed on the drive fixing seat 19, and the proximity switch 23 is arranged on one side of the sensing column 22.

[0058] In this embodiment, during the detection process, the servo motor 12 starts and drives the reducer 13 to operate, thereby driving the drive shaft 16 and the differential to operate. The dynamic torque sensor 14 monitors and records the torque value in real time, and the proximity switch 23 continuously detects the position of the drive shaft 16 to ensure the accuracy and safety of the detection process.

[0059] In a further preferred embodiment of the present invention, the correcting mechanism 24 includes an arc plate 25, a group of clamps 26, a support frame 27 and a group of photoelectric detection equipment 28, the arc plate 25 is arranged above the workbench 8, a group of clamps 26 are arranged on the arc plate 25 for clamping and fixing the differential, the support frame 27 is slidably arranged on the top of the workbench 8, and a connecting port 29 is opened on the workbench 8, and the connecting port 29 is located directly above the drive shaft 16, a group of photoelectric detection equipment 28 are respectively installed on both sides of the support frame 27, and the photoelectric detection equipment 28 located below is arranged opposite to the drive shaft 16.

[0060] In this embodiment, before the test, the differential to be tested is first placed on the clamp block 26 and fixed by the clamp block 26. At this time, the differential is in mid-air, and the output end is in the same horizontal line with the center of the connection port. Then the photoelectric detection device 28 starts to work. The photoelectric detection device 28 is a machine vision system, which is a non-contact photoelectric detection device. It uses a high-resolution camera and an image processing algorithm to capture and analyze the image of the object, so as to obtain its shape, size, position and other information. By taking images of the internal spline teeth and the external spline tooth grooves, the image processing algorithm is used to identify and measure the shape, spacing, alignment, etc. of the teeth. Then, according to the data sent by the photoelectric detection device 28, the control system determines the alignment of the tooth groove and the teeth. If there is misalignment, the control The system starts the servo motor 12, and drives the drive head 17 to rotate through the drive shaft 16 until the tooth groove and the tooth teeth are completely aligned. After the correction is completed, the clamp block 26 automatically slides down to place the differential on the positioning pin 51, and then fixes it through the positioning clamping tool 4. Then the drive assembly continues to perform subsequent detection tasks. Through the setting of the correction mechanism 24, the alignment between the differential output shaft and the drive head 17 can be monitored and adjusted in real time to ensure the correct correspondence between the tooth groove and the tooth teeth, avoiding installation problems caused by misalignment. Through the automated detection and correction process, the time for manual intervention and inspection is reduced, and the detection efficiency is improved. The introduction of the correction mechanism 24 enables the detection system to more accurately locate the differential and reduce the detection error caused by position deviation. In addition, in the above-mentioned correction mechanism 24, at least one reflector is set diagonally opposite to the camera lens to reflect the part where the internal spline teeth and the external spline tooth groove deviate and cannot be directly captured by the camera lens, so as to provide more image data of the internal spline teeth and the external spline tooth groove to improve the recognition accuracy.

[0061] In a further preferred embodiment of the present invention, a U-shaped plate 30 is provided above the workbench 8, and the U-shaped plate 30 is located on one side of the arc-shaped plate 25. A group of first electric telescopic rods 32 are installed on the arc-shaped plate 25, and the output rods of a group of the first electric telescopic rods 32 are respectively fixedly connected to a group of the clamping blocks 26, and a group of the clamping blocks 26 are fixedly installed with anti-slip pads 33.

[0062] In this embodiment, through the telescopic movement of the first electric telescopic rod 32, the clamping block 26 can accurately clamp the differential to ensure its stability during the detection process. The precise control of the first electric telescopic rod 32 makes the clamping force moderate, which will not damage the differential and can effectively prevent it from slipping. The introduction of the anti-skid pad 33 further enhances the anti-skid performance of the clamping block on the differential, prevents the differential from moving or slipping, and ensures the smooth progress of the detection.

[0063] In a further preferred embodiment of the present invention, a support plate 34 is fixedly installed on the top of the workbench 8, a connecting box 35 is fixedly installed on the top of the support plate 34, a one-way screw 36 is rotatably installed in the connecting box 35, a slider 37 is threadedly sleeved on the one-way screw 36, and the slider 37 is fixedly connected to the arc plate 25, a rotating rod 38 is rotatably installed on the bottom of the support plate 34, the bottom ends of the rotating rod 38 and the one-way screw 36 are fixedly sleeved with a first bevel gear 39, and the two first bevel gears 39 are meshed with each other, a small motor 40 is fixedly installed on one side of the connecting box 35, and a second bevel gear 41 is fixedly sleeved on the output shaft of the small motor 40 and the rotating rod 38, and the two second bevel gears 41 are meshed with each other.

[0064] In this embodiment, after adjusting the drive head 17, the small motor 40 is started, and the rotation of the small motor 40 is transmitted to the rotating rod 38 through the second bevel gear 41, and the rotation of the rotating rod 38 is transmitted to the one-way screw 36 through the first bevel gear 39. Due to the threaded connection between the one-way screw 36 and the slider 37, the rotation of the one-way screw 36 will drive the slider 37 to slide down along the length direction of the one-way screw 36, and the sliding of the slider 37 will drive the arc plate 25 and the clamping block 26 thereon and the differential to slide down together until the threaded hole of the flange on the differential is inserted into the positioning pin on the workbench 8, and the differential is positioned. The small motor 40 drives the one-way screw 36 and the slider 37 to cooperate, so as to achieve accurate sliding and positioning of the differential. This design reduces the error of manual operation and improves the positioning accuracy. The automatic drive system simplifies the operation process and reduces the requirements for the skills of the operator. The operator only needs to start the small motor 40 to complete the sliding and positioning process of the differential.

[0065] In a further preferred embodiment of the present invention, a threaded rod 42 is rotatably installed on the top of the workbench 8, and the threaded rod 42 is threadedly connected to the support frame 27. A sprocket 43 is fixedly installed on one end of the threaded rod 42 and the rotating rod 38. A chain 44 is sleeved on the two sprockets 43, and the chain 44 is meshed with the two sprockets 43. The positioning and clamping tool 4 consists of a cylinder and a fixing pin. The cylinder is fixedly installed on the top of the workbench 8 and is located on one side of the connecting port 29. The fixing pin is installed on the output rod of the cylinder. A positioning pin 51 is fixedly installed on the top of the workbench 8, and the positioning pin 51 is slidably connected to the threaded hole of the differential upper flange.

[0066] In this embodiment, while the one-way screw 36 drives the slider 37 to slide down, the rotating rod 38 will also rotate. Since the rotating rod 38 and one end of the threaded rod 42 are fixedly installed with a sprocket 43, and the two sprockets 43 are sleeved with meshing chains 44, the rotation of the rotating rod 38 will be transmitted to the threaded rod 42 through the chain, so that the threaded rod 42 also rotates synchronously. When the threaded rod 42 rotates, it will drive the support frame 27 threadedly connected thereto to move along the length direction of the threaded rod, that is, to slide to the left. The sliding of the support frame 27 drives the photoelectric detection device 28 to move together The one-way screw 36 drives the slider 37 to slide down while the threaded rod 42 drives the support frame 27 to slide, so that the photoelectric detection device 28 can automatically move away from the connection port 29, which provides sufficient space for the subsequent installation of the differential. The synchronous rotation of the rotating rod 38 and the threaded rod 42 is achieved through the transmission of the sprocket 43 and the chain 44. This design simplifies the drive system, reduces the additional drive source and transmission mechanism, and reduces the cost. While the one-way screw 36 drives the slider 37 to slide down, the threaded rod 42 drives the support frame 27 to slide, so that the photoelectric detection device 28 can automatically move away from the connection port 29, which provides convenience for the subsequent installation of the differential. This design optimizes the operation process and improves work efficiency.

[0067] After the differential is placed on the workbench 8 and moved to the appropriate position through the previously described drive system (such as the one-way screw 36, the threaded rod 42, etc.), the threaded hole on the differential flange will be slidably connected with the positioning pin 51. At this time, the cylinder is started, and the output rod of the cylinder will drive the fixing pin to extend and insert into another or several threaded holes on the differential flange (these threaded holes are usually used to connect components such as drive shafts, but are used as clamping points here), thereby firmly fixing it on the workbench 8. The positioning pin 51 is slidably connected with the threaded hole on the differential flange to ensure the precise position of the differential on the workbench. This design reduces the error of manual positioning and improves the accuracy of the test. The positioning and clamping fixture 4 composed of the cylinder and the fixing pin can generate sufficient clamping force to firmly fix the differential on the workbench 8, thereby preventing the differential from moving or vibrating during the test and ensuring the smooth progress of the test.

[0068] The present invention also provides a method for using a differential integrated test bench, such as Fig.11 As shown, the following steps are included:

[0069] Step 1: First, power on the equipment and start the entire detection system. After the system starts, immediately check whether there is an alarm signal. If an alarm signal is detected, proceed to the next step; if not, continue normal operation.

[0070] After ensuring that the equipment has no faults and the air pressure and servo motor 12 are normal, the system starts waiting to receive the material picking signal.

[0071] Positioning, clamping and starting: Once the material picking signal is received, the system will automatically clamp the differential through the clamp block 26, and correct the drive head 17 through the correction mechanism, so that the internal spline teeth of the differential are aligned with the tooth grooves of the drive head 17. After alignment, the differential is placed on the positioning pin, and the differential is clamped by the positioning clamping tool 4 to prepare for the subsequent rotation of the differential;

[0072] Step 2: Alarm processing:

[0073] Manual reset attempt: First try a manual reset to eliminate possible faults.

[0074] Manual / automatic selection: If manual reset is invalid, it switches to automatic mode and the system automatically handles the alarm.

[0075] Air pressure and motor check: In automatic mode, the system will check whether the air pressure is normal and whether the servo motor 12 can operate normally, which is a key step to ensure the smooth operation of subsequent operations;

[0076] Step 3: Differential rotation and timing:

[0077] Constant speed: The system activates the differential at a constant speed to ensure stable operation.

[0078] Forward and reverse timing: The differential will perform forward and reverse operations according to the set time (for example, 30 seconds forward and 30 seconds reverse) to test the performance of the differential.

[0079] Waiting for the output of the material taking signal: After completing the forward and reverse operation, the system will wait for the output of the material taking signal so that the differential can be removed from the equipment;

[0080] Step 4: Fault standby and processing:

[0081] Failure Standby: If a failure or error occurs in any step, the system will immediately enter the Failure Standby state to prevent further damage.

[0082] Solution: Check the air pressure and start the servo motor 12 to troubleshoot and repair the problem. If the problem cannot be solved, contact the manufacturer for further repairs.

[0083] In order to further improve the use effect of the device, in addition to the above scheme, this scheme also has the following embodiments:

[0084] In another embodiment of the present invention, the U-shaped plate 30 is provided with an adjustment mechanism for adjusting the position of the threaded hole of the flange on the differential, and the adjustment mechanism includes a positioning sensor 45, a driving gear 46, an arcuate rack 47, a second electric telescopic rod 48 and a driving rack 49, the positioning sensor 45 is fixedly mounted on the support frame 27, the driving gear 46 is rotatably mounted in the U-shaped plate 30, the arcuate rack 47 is fixedly mounted on one side of the arcuate plate 25, the arcuate rack 47 is meshed with the driving gear 46, the second electric telescopic rod 48 is fixedly mounted in the U-shaped plate 30, the driving rack 49 is mounted on the output rod of the second electric telescopic rod 48, and the driving rack 49 is meshed with the driving gear 46.

[0085] In this embodiment, when the differential is clamped in midair by the clamp block 26, the positioning sensor 45 will detect the position of the threaded hole on the flange. If the actual position of the threaded hole does not match the expected position, the control system will start the second electric telescopic rod 48, and the output rod of the second electric telescopic rod 48 will drive the driving rack 49 to move, and the driving rack 49 will mesh with the driving gear 46, thereby driving the driving gear 46 to rotate. The rotation of the driving gear 46 will move along the tooth surface of the arc rack 47, thereby driving the arc plate 25 (and the differential) to rotate, thereby adjusting it. Through continuous adjustment, it can be ensured that the position of the threaded hole on the flange of the differential corresponds to the expected position. Through the cooperation of the positioning sensor 45, the driving gear 46, the arc rack 47 and the second electric telescopic rod 48, the position of the threaded hole on the flange of the differential is accurately adjusted. The automated adjustment process simplifies the operation process and reduces the requirements for the skills of the operator. The operator only needs to start the adjustment mechanism to complete the fine adjustment of the differential position.

[0086] In another embodiment of the present invention, two guide blocks 50 are fixedly installed in the U-shaped plate 30 , and the two guide blocks 50 are slidably connected to the driving rack 49 and the arc-shaped rack 47 respectively.

[0087] In this embodiment, the driving rack 49 will move under the drive of the second electric telescopic rod 48, and the arcuate rack 47 will move along its tooth surface as the driving gear 46 rotates. At this time, the two guide blocks 50 are slidingly connected to the driving rack 49 and the arcuate rack 47 respectively, providing them with stable guidance and support, ensuring the stability and accuracy of the driving rack 49 and the arcuate rack 47 during the movement, thereby improving the adjustment accuracy and reliability of the arc plate 25.

[0088] In summary, compared with related technologies, this test bench not only realizes accurate, efficient and automated detection of differential performance, but also improves the convenience of operation, traceability of data management and safety of the test process.

[0089] In the several embodiments provided in this application, it should be understood that the disclosed device can be implemented in other ways.

[0090] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field can still combine, add, delete or make other adjustments to the features in the various embodiments of the present invention according to the circumstances without conflict, without making creative work, so as to obtain different other technical solutions that do not deviate from the concept of the present invention in essence, and these technical solutions also belong to the scope of protection of the present invention.

Claims

1. A differential comprehensive test bench, characterized in that: include: A base frame assembly (1), the base frame assembly (1) comprising a workbench (8); A drive assembly (2) for testing a differential is arranged on the chassis assembly (1), the drive assembly (2) comprising a drive head (17), the drive head (17) being an external spline and matching with an internal spline at an input end of the differential; A group of button boxes (3) all mounted on one side of the workbench (8); A positioning clamping tool (4) provided on the workbench (8) for positioning the differential; A photoelectric sensor assembly (5) and a reflector (6) are both mounted on the top of the workbench (8) and are used to detect whether the differential is correctly positioned and clamped, wherein the photoelectric sensor assembly (5) and the reflector (6) are arranged relative to each other; A deviation correction mechanism (24) is arranged on the workbench (8) and is used for correcting the deviation of the driving head (17).

2. The differential integrated test bench according to claim 1, characterized in that: The top of the workbench (8) is equipped with an oil receiving pan (7), which is located on one side of the positioning and clamping tooling (4). The oil receiving pan (7) is used to collect lubricating oil leaked from the differential after being tested. A group of the button boxes (3) respectively use a three-hole button box (3) and a single-hole button box (3).

3. The differential integrated test bench according to claim 1, characterized in that: The base frame assembly (1) further comprises a shell, an electrical cabinet (9), a touch screen (10) and a warning light (11); the workbench (8) is mounted on the shell, the electrical cabinet (9) is mounted on one side of the shell, the touch screen (10) is arranged on the top of the shell, and the warning light (11) is mounted on the top of the outer shell of the touch screen (10).

4. The differential integrated test bench according to claim 3, characterized in that: The driving component (2) also includes a detection component (18), a connecting rod (15) and a driving shaft (16). The detection component (18) is composed of a servo motor (12), a reducer (13) and a dynamic torque sensor (14). The servo motor (12) and the reducer (13) are both installed in the housing. The output shaft of the servo motor (12) is connected to the reducer (13). The dynamic torque sensor (14) is arranged on the reducer (13). The connecting rod (15) is arranged above the dynamic torque sensor (14). The driving shaft (16) is arranged above the connecting rod (15). The two ends of the driving shaft (16) are respectively connected to the driving head (17) and the dynamic torque sensor (14).

5. The differential integrated test bench according to claim 4, characterized in that: The driving assembly (2) is further provided with a driving fixed seat (19), a positioning sleeve (20), a shaft sleeve (21), a sensing column (22) and a proximity switch (23); the driving fixed seat (19) is arranged in the housing; the driving shaft (16) passes through the driving fixed seat (19); the positioning sleeve (20) is arranged on the top of the driving fixed seat (19); the shaft sleeve (21) is sleeved on the driving shaft (16) and connected to the positioning sleeve (20); the sensing column (22) is installed on the driving fixed seat (19); and the proximity switch (23) is arranged on one side of the sensing column (22).

6. The differential integrated test bench according to claim 4, characterized in that: The deviation correction mechanism (24) comprises an arc plate (25), a group of clamping blocks (26), a support frame (27) and a group of photoelectric detection devices (28), wherein the arc plate (25) is arranged above the workbench (8), a group of clamping blocks (26) are arranged on the arc plate (25) for clamping and fixing the differential, the support frame (27) is slidably arranged on the top of the workbench (8), a connecting port (29) is opened on the workbench (8), and the connecting port (29) is located directly above the drive shaft (16), a group of photoelectric detection devices (28) are respectively installed on both sides of the support frame (27), and the photoelectric detection device (28) located at the bottom is arranged opposite to the drive shaft (16).

7. The differential integrated test bench according to claim 6, characterized in that: A U-shaped plate (30) is arranged above the workbench (8), and the U-shaped plate (30) is located on one side of the arc-shaped plate (25). A group of electric telescopic rods (32) are installed on the arc-shaped plate (25), and the output rods of a group of the electric telescopic rods (32) are respectively fixedly connected to a group of the clamping blocks (26), and an anti-slip pad (33) is fixedly installed on each of the clamping blocks (26).

8. The differential integrated test bench according to claim 7, characterized in that: A support plate (34) is fixedly installed on the top of the workbench (8), a connecting box (35) is fixedly installed on the top of the support plate (34), a one-way screw (36) is rotatably installed in the connecting box (35), a slider (37) is threadedly sleeved on the one-way screw (36), and the slider (37) is fixedly connected to the arc plate (25), a rotating rod (38) is rotatably installed on the bottom of the support plate (34), the bottom ends of the rotating rod (38) and the one-way screw (36) are both fixedly sleeved with a first bevel gear (39), and the two first bevel gears (39) are meshed with each other, a small motor (40) is fixedly installed on one side of the connecting box (35), and a second bevel gear (41) is fixedly sleeved on the output shaft of the small motor (40) and the rotating rod (38), and the two second bevel gears (41) are meshed with each other.

9. The differential integrated test bench according to claim 8, characterized in that: A threaded rod (42) is rotatably mounted on the top of the workbench (8), and the threaded rod (42) is threadedly connected to the support frame (27). A sprocket (43) is fixedly mounted on one end of the threaded rod (42) and the rotating rod (38). A chain (44) is sleeved on the two sprockets (43), and the chain (44) is meshed with the two sprockets (43). The positioning clamping tool (4) consists of a cylinder and a fixing pin. The cylinder is fixedly mounted on the top of the workbench (8) and is located on one side of the connecting port (29). The fixing pin is mounted on the output rod of the cylinder. A positioning pin (51) is fixedly mounted on the top of the workbench (8), and the positioning pin (51) is slidably connected to the threaded hole of the upper flange of the differential.

10. The method for using the differential integrated test bench according to any one of claims 1 to 9, characterized in that: The steps include: Step 1: First, power on the device and start the entire detection system. After the system starts, immediately check whether there is an alarm signal. If an alarm signal is detected, proceed to the next step; if not, continue normal operation; After ensuring that the equipment is fault-free and the air pressure and servo motor (12) are normal, the system starts waiting to receive the material taking signal; Positioning, clamping and starting: Once the material picking signal is received, the system will automatically clamp the differential through the clamping block (26), and correct the drive head (17) through the correction mechanism, so that the internal spline teeth of the differential are aligned with the tooth grooves of the drive head (17). After alignment, the differential is placed on the positioning pin (51), and the differential is clamped by the positioning clamping tool (4) to prepare for the subsequent rotation of the differential; Step 2: Alarm processing: Manual reset attempt: First try manual reset to eliminate possible faults; Manual / automatic selection: If manual reset is invalid, it switches to automatic mode and the system automatically handles the alarm. Air pressure and motor check: In automatic mode, the system will check whether the air pressure is normal and whether the servo motor (12) can operate normally, which is a key step to ensure the smooth operation of subsequent operations; Step 3: Differential rotation and timing: Constant speed: The system activates the differential at a constant speed to ensure stable operation. Forward and reverse timing: The differential will perform forward and reverse operations according to the set time to test the performance of the differential; Waiting for the output of the material taking signal: After completing the forward and reverse operation, the system will wait for the output of the material taking signal so that the differential can be removed from the equipment; Step 4: Fault standby and processing: Fault Standby: If a fault or error occurs in any step, the system will immediately enter fault standby to prevent further damage; Solution: Check the air pressure and start the servo motor (12) to troubleshoot and repair the problem.

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