Differential lock comprehensive testing device

Abstract

The invention discloses a differential lock comprehensive testing device, relates to the technical field of automobile power assembly detection, solves the problems that manual differential lock testing is troublesome in operation and inaccurate in testing result, adopts a material conveying line body and a material carrying table to convey a differential lock to a jacking assembly, and utilizes a robot carrying assembly to clamp and move the differential lock to a bearing table. A shell of the differential lock is limited, then the test piece moves downwards until the spline rod is inserted into the differential lock, the spline rod is connected with one half shaft gear, then the drive motor drives the shell of the differential lock to operate, meanwhile, the hysteresis brake gives out test load force, and a planetary gear in the differential lock is limited; detection can be carried out through the torque sensor and the pressure sensor, obtained data are transmitted to the control system in the electric cabinet to be recorded and analyzed, carrying is carried out through the robot carrying assembly after testing is completed, manual carrying and testing are not needed in the whole operation process, and therefore the problems that manual testing of the differential lock is troublesome in operation and inaccurate in testing result are solved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile powertrain testing, and in particular to a comprehensive testing device for differential locks. Background Art

[0002] The differential lock is a differential with automatic locking function, which mainly includes a housing, left / right half-shaft gears, two planetary gears, a transmission shaft, and a coil, etc. The function of the differential lock is to improve the vehicle's ability to pass on bad roads, that is, when one of the vehicle's drive axles is idling, the differential can be quickly locked to make the two drive axles rigidly connected.

[0003] With the continuous development of science and technology, differential locks are increasingly widely used in different models of various car manufacturers. For a qualified differential lock, first of all, it needs to have normal differential function, the left and right half-shaft gears should not have any stagnation or abnormal noise during differential movement, and at the same time, it should not have too high starting torque; secondly, its locking part needs to be reliably locked under the set speed difference, and it needs to be unlocked quickly when the unlocking conditions are met. Therefore, it is particularly important to check and verify the function of the differential lock, especially the online inspection of the product by the relevant production factory.

[0004] However, the existing differential lock testing is generally carried out manually. During the test, the differential lock is manually installed on the test bench and connected to the test equipment using a dedicated connection line or plug, and then the operation of the vehicle under different driving conditions is simulated to check whether the differential lock can respond correctly and lock or unlock, etc. In addition, the differential lock test data and results, such as the response time of the differential lock, are manually recorded to evaluate the performance and reliability of the differential lock.

[0005] In the above-mentioned related technologies, the applicant believes that there are at least the following problems: the existing manual testing method is not only cumbersome to operate, but also prone to errors in the manual operation detection process, resulting in inaccurate test results. Therefore, it is urgent to propose a comprehensive differential lock testing device. Summary of the invention

[0006] In order to improve the problem of cumbersome operation and inaccurate test results in manual testing of differential locks, the present application provides a comprehensive testing device for differential locks.

[0007] The present application provides a differential lock comprehensive test device, which adopts the following technical solution:

[0008] A differential lock comprehensive test device, comprising a fence for safety protection, a feed line for conveying the differential lock, a robot handling component, a test machine component and an NG placement table;

[0009] Fences are respectively provided at both ends of the feed line, a loading platform is provided on the feed line for horizontal sliding, a supporting seat is provided on the loading platform for placing a differential lock, a plurality of limit columns are provided on the supporting seat for plugging the differential lock, and a lifting component is provided on the feed line for lifting the loading platform;

[0010] The robot handling assembly includes a six-axis robot for handling a differential lock, a mounting seat arranged on the six-axis robot, and two clamping claws for clamping the differential lock, wherein the clamping claws are movably arranged on the mounting seat, and the mounting seat is provided with a pneumatic part for controlling the movement of the clamping claws;

[0011] The test bench assembly includes a lower frame, a column arranged on the lower frame, a test piece arranged on the column, and a rotating piece arranged on the lower frame. The test piece includes a sliding frame arranged on the column for moving up and down, a mounting frame and a connecting frame arranged on the sliding plate, a hysteresis brake and an electromagnetic brake arranged on the mounting frame, and a pressure sensor arranged on the connecting frame. The column is provided with a control member for controlling the movement of the sliding frame. The connecting frame is located below the mounting frame. The sliding frame is provided with a torque sensor between the electromagnetic brake and the pressure sensor. The hysteresis brake, electromagnetic brake, torque sensor and pressure sensor are arranged in sequence from top to bottom, and the hysteresis brake, electromagnetic brake and torque sensor are coaxially connected.

[0012] The connecting frame is provided with a clamping piece for clamping a differential lock, and the connecting frame is provided with a spline rod for connecting the differential lock below the pressure sensor, and the spline rod is coaxially arranged with the torque sensor;

[0013] The rotating member includes a fixed seat arranged on the lower frame, a receiving platform rotatably connected to the fixed seat, a driving motor for driving the receiving platform to rotate, and a positioning column arranged on the receiving platform, wherein the positioning column is used to position the differential lock, the positioning column is multiple and slidably connected to the receiving platform, and the receiving platform is provided with a control member for controlling the movement of the positioning column.

[0014] Preferably, the control member includes an active rod and an operating rod rotatably arranged in a receiving platform, and a driven rod, an active bevel gear coaxially arranged at both ends of the active rod, a driven bevel gear coaxially arranged at one end of the driven rod, a pushing bevel gear coaxially arranged at one end of the operating rod, and a slider threadedly connected to the driven rod, the number of the driven rods is the same as the number of the positioning columns, and a plurality of driven rods are distributed at intervals along the circumferential direction, the slider is horizontally slidably connected to the receiving platform, and the positioning column is connected to the slider; the axial direction of the active rod and the axial direction of the driven rod are arranged perpendicular to each other, one end of the operating rod extends to the outer wall of the receiving platform, and a fixing member is arranged between the operating rod receiving platforms; the pushing bevel gear is meshingly connected to the active bevel gear located at the bottom of the active rod, and the active bevel gear is meshingly connected to the driven bevel gear.

[0015] Preferably, the connecting frame includes a fixed block installed on the sliding frame and connecting seats arranged on both sides of the fixed block, the fixed block is rotatably connected to a rotating rod for installing a spline rod, and the rotating rod is coaxially arranged with the spline rod; the fixed block is provided with a mounting sleeve, the rotating rod is coaxially arranged with the mounting sleeve and the rotating rod is passed through the mounting sleeve, the rotating rod is coaxially provided with a fixed shaft sleeve for installing the spline rod, and the fixed shaft sleeve is provided with a fixing bolt passing through the spline rod.

[0016] Preferably, the spline rod is coaxially provided with a fixing rod, the bottom end of the rotating rod is provided with a fixing groove for the fixing rod to be inserted, the cross section of the fixing rod is a polygonal structure, and the fixing rod and the fixing groove are matched.

[0017] Preferably, the clamping member includes a clamping block horizontally slidably arranged below the connecting seat, a clamping cylinder for pushing the clamping block to move, a piston rod of the clamping cylinder is fixed to the clamp, and the pressure sensor is arranged at the clamping block.

[0018] Preferably, a tooth block for abutting against a differential lock is provided on a side of the clamping block away from the clamping cylinder.

[0019] Preferably, the lifting assembly includes a fixed frame arranged on the feed line body, a lifting cylinder arranged on the fixed frame, and a lifting plate for lifting the loading platform to completely detach the feed line body. The piston rod of the lifting cylinder is connected to the lifting plate, and the lifting plate is always located between the loading platform and the fixed frame.

[0020] Preferably, the pneumatic part is a clamping cylinder arranged on a mounting seat, the number of the clamping cylinders is the same as the number of clamping jaws, and one clamping cylinder is installed corresponding to one clamping jaw, and the clamping jaw is provided with a lifting plate for lifting the differential lock.

[0021] In summary, the present application includes at least one of the following beneficial effects:

[0022] 1. During the test, the feed line and the loading platform transport the differential lock to be tested to the jacking assembly, and the loading platform is lifted by the jacking cylinder and the jacking plate until the loading platform is completely separated from the feed line. Then the six-axis robot and the clamping claw can be used to clamp the differential lock and move it to the receiving platform. The positioning column is inserted into the bottom hole of the differential lock. Then the control component controls the sliding frame to move down to drive the test piece to move down to the spline rod and insert it into the differential lock, so that the spline rod and one of the half-shaft gears are connected. Then the motor drives the receiving platform to rotate, so that the differential lock housing is driven to run at a certain speed, and the hysteresis brake is given at the same time. A certain load force is applied to clamp the planetary gear in the differential lock, and the torque sensor and pressure sensor can be used for detection. The data obtained is transmitted to the control system in the electric cabinet for recording and analysis, and then it is determined whether it is a qualified product. If it is a qualified product, the robot handling component will carry the differential lock to the loading platform on the feeding line. Otherwise, it will be carried to the NG placement table for processing. The robot is responsible for the handling of the entire operation process, and the test piece is responsible for the testing. There is no need for manual handling and testing, thus avoiding the trouble of manual testing of the differential lock and the occurrence of inaccurate test results.

[0023] 2. When the size of the differential lock to be tested changes, the spline rod can be replaced by the fixing bolt, and the position of the positioning column on the receiving platform can be adjusted by the operating lever, that is, the operating lever is rotated to drive the pushing bevel gear and one of the active bevel gears to mesh and the active bevel gear and the driven bevel gear to mesh, so that the slider moves along the axial direction of the driven rod, and the position of the positioning column on the receiving platform can be adjusted to adapt to the installation of differential locks of different sizes, thereby improving the adaptability of the test device. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the overall structure of this embodiment of the present application;

[0025] Figure 2 This is a schematic diagram of the structure of the robot when loading materials in this embodiment of the present application;

[0026] Figure 3 This is a schematic diagram of the structure of the embodiment of the present application highlighting the jacking assembly and the loading platform;

[0027] Figure 4 It is a schematic diagram of the overall structure of the test machine assembly of this embodiment of the present application;

[0028] Figure 5 is a schematic diagram of the structure of the test piece highlighted in this embodiment of the present application;

[0029] Figure 6 This is a schematic diagram of the structure of the embodiment of the present application highlighting the connection between the spline rod and the rotating rod;

[0030] Figure 7This is a schematic diagram of the structure of the embodiment of the present application, highlighting the column and the rotating member;

[0031] Figure 8 It is a partial cross-sectional schematic diagram of the rotating part of this embodiment of the present application.

[0032] Explanation of reference numerals: 1. fence; 2. feed line; 21. lifting assembly; 211. fixed frame; 2111. fixed plate; 2112. connecting plate; 212. lifting cylinder; 213. lifting plate; 3. robot handling assembly; 31. six-axis robot; 32. mounting seat; 321. clamping cylinder; 322. connecting block; 33. clamping claw; 34. lifting plate; 4. test machine assembly; 41. lower frame; 42. column; 421. vertical slide rail; 43. test piece; 431. sliding frame; 432. mounting frame; 4321. horizontal plate; 4322. vertical plate; 4323. reinforcing rib; 433. connecting frame; 4331. fixed block; 4332. connecting seat; 4333. guide cylinder; 434. hysteresis brake; 435. electromagnetic brake; 44. rotating part; 441, fixed seat; 442, receiving platform; 4421, avoidance; 443, driving motor; 444, positioning column; 5, NG placement table; 6, loading platform; 7, supporting seat; 71, avoidance; 72, limiting column; 8, control part; 81, control motor; 82, linear guide; 9, torque sensor; 10, clamping part; 101, clamping block; 1011, gear block; 102, clamping cylinder; 11, spline rod; 111, fixed rod; 12, rotating rod; 13, fixed shaft sleeve; 14, fixing bolt; 15, mounting sleeve; 16, operating part; 161, active rod; 162, operating rod; 163, driven rod; 164, active bevel gear; 165, driven bevel gear; 166, slider; 167, pushing bevel gear; 17, handle; 18, fixing part. DETAILED DESCRIPTION

[0033] The differential lock studied in this application belongs to a type of differential, and mainly includes a housing, left / right half-shaft gears, two planetary gears, a transmission shaft, a coil, etc. It should be noted that before the test, the differential lock to be tested is in an unlocked state.

[0034] The present application is described in further detail below.

[0035] A differential lock comprehensive test device disclosed in the embodiment of the present application, referring to Figure 1The differential lock comprehensive test device includes a fence 1 for safety protection, a feed line 2 for loading, a robot handling component 3 for handling differential locks, a test machine component 4, an NG placement table 5, and an electric cabinet. The electric cabinet is located between the test machine component 4 and the NG placement table 5. During the test, the feed line 2 transports the differential lock to be tested into the fence 1 and is located near the robot handling component 3. Then, with the help of the robot handling component 3, the differential lock is transported to the test machine component 4 for testing. The test data is transported to the electric cabinet for record, storage and analysis. If it is qualified, it is transported to the feed line 2 by the robot handling component 3. If it is unqualified, it is transported to the NG placement table 5.

[0036] Reference Figure 1 Specifically, the fence 1 is also designed with components such as doors and safety locks. The fence 1 surrounds the robot transport component 3, the test machine component 4, and the NG placement table 5 to prevent people from entering by mistake during testing and ensure their safety.

[0037] Reference Figure 2 and Figure 3 , a feed line 2, and two ends of the feed line 2 are respectively provided with a fence 1, which is used to transport the differential lock to be tested and to transport the qualified differential lock out of the fence 1. To this end, the top of the feed line 2 is horizontally slidably connected with a loading platform 6, which is generally a rectangular structure, and the length direction of the loading platform 6 is arranged parallel to the conveying direction of the feed line 2. A support seat 7 is installed on the top of the loading platform 6, and the support seat 7 is used to place the differential lock. Four clearance openings 71 are arranged at intervals on the top of the support seat 7 for the robot handling component 3 to insert and remove the differential lock. Four limiting columns 72 are installed at intervals on the top of the support seat 7, and the four limiting columns 72 are distributed on the same circumference, and the limiting columns 72 are located between adjacent clearance openings 71. A flange with holes is fixed at the bottom of the differential lock. When placed, the holes on the flange are respectively sleeved on the limiting columns 72 to horizontally limit the entire differential lock.

[0038] Reference Figure 2 and Figure 3 Furthermore, a lifting assembly 21 is provided at the bottom of the feed line 2 for lifting the loading platform 6. The lifting assembly 21 includes a fixed frame 211 installed at the bottom of the feed line 2, a lifting cylinder 212 located at the bottom of the fixed frame 211, and a lifting plate 213 for lifting the loading platform 6 completely out of the feed line 2. Among them, the fixed frame 211 includes a fixed plate 2111 located below the feed line 2, two connecting plates 2112 fixed to the bottom of the feed line 2, and the two ends of the fixed plate 2111 are respectively installed on the connecting plates 2112. The lifting cylinder 212 is installed at the bottom of the fixed plate 2111, and the piston rod of the lifting cylinder 212 is connected to the fixed plate 2111 by sliding up and down, and the top of the piston rod of the lifting cylinder 212 is fixed to the bottom of the lifting plate 213.

[0039] Reference Figure 2 As shown in Figure 2 , the robot handling component 3 includes a six-axis robot 31 for handling differential locks, a mounting base 32 installed on the six-axis robot 31, and two grippers 33 for gripping differential locks. Among them, the feeding line body 2, the testing machine platform component 4, and the MG placement table are distributed around the six-axis robot 31 to achieve automated operation. The mounting base 32 is generally in a cuboid structure. Two grippers 33 are provided as a group at one end of the mounting base 32, and there are two groups of grippers 33 located on the mounting base 32 to improve the handling efficiency.

[0040] Reference Figure 2 As shown in Figure 2 , further, a pneumatic component is provided at the mounting base 32 adjacent to the gripper 33 for controlling the movement of the gripper 33 to clamp the differential lock. The pneumatic component is a clamping cylinder 321 installed at the bottom of the mounting base 32. Two clamping cylinders 321 are provided as a group and are installed side by side at one end of the mounting base 32. The number of clamping cylinders 321 is the same as the number of grippers 33, and one clamping cylinder 321 is installed corresponding to one gripper 33. A connecting block 322 is fixed to the piston rod of the clamping cylinder 321, and the side of the connecting block 322 away from the piston rod is fixed to the gripper 33. The gripper 33 is generally in an "L" shape, and the side of the gripper 33 in contact with the differential lock is provided with an arc-shaped structure.

[0041] Reference Figure 2 As shown in Figure 2 , further, a lifting plate 34 is installed on the side of the gripper 33 away from the cylinder for supporting the bottom of the differential lock. The lifting plate 34 is generally also in an "L" shape. Before lifting the differential lock, the lifting plate 34 is inserted into the让位口 71, and at the same time, the gripper 33 clamps the differential lock, so that the differential lock can be clamped and transported to the testing machine platform component 4.

[0042] Reference Figure 4 and Figure 5 As shown in Figure 4 and Figure 5 , the testing machine platform component 4 includes a lower frame 41, two columns 42 fixed to the top of the lower frame 41, a test piece 43 provided on the columns 42, and a rotating member 44 provided on the top of the lower frame 41. The test piece 43 includes a sliding frame 431 slidably connected up and down to the columns 42, a mounting frame 432, a connecting frame 433 installed on the side of the sliding frame 431 away from the columns 42, a hysteresis brake 434 and an electromagnetic brake 435 installed on the mounting frame 432, and a pressure sensor located at the connecting frame 433. Among them, a control member 8 is provided on the columns 42 for controlling the up and down movement of the sliding frame 431. The control member 8 includes a control motor 81 and a linear guide 82. An installation block (not shown in the figure) for connecting the sliding frame 431 is slidably connected up and down to the linear guide 82. In addition, vertical sliding rails 421 are respectively installed on both sides of the columns 42 close to the sliding frame 431. The sliding frame 431 is generally in an "冂" shape and is slidably connected up and down to the vertical sliding rails 421. In other embodiments, the control member 8 can also adopt an embedded module (自带电机).

[0043] Reference Figure 4 and Figure 5 The mounting frame 432 is located directly above the connecting frame 433. The mounting frame 432 includes a horizontal plate 4321 fixed to the sliding frame 431, a vertical plate 4322 vertically fixed to the top of the horizontal plate 4321, and a reinforcing rib 4323 arranged between the horizontal plate 4321 and the sliding frame 431. The hysteresis brake 434 is mounted on the vertical plate 4322, and the hysteresis brake 434 is located between the vertical plate 4322 and the control motor 81. The electromagnetic brake 435 is mounted on the horizontal plate 4321, so that the electromagnetic brake 435 is located directly below the hysteresis brake 434; the electromagnetic brake 435 and the hysteresis brake 434 are connected by a coupling, and the axis center line of the electromagnetic brake 435 coincides with the axis center line of the hysteresis brake 434.

[0044] Reference Figure 5 A torque sensor 9 is coaxially arranged directly below the electromagnetic brake 435. The top end of the torque sensor 9 is connected to the electromagnetic brake 435 through a coupling, and the torque sensor 9 is located above the pressure sensor.

[0045] Reference Figure 5 and Figure 6 The connecting frame is provided with a clamping member 10 for clamping the differential lock. The connecting frame 433 includes a fixed block 4331 installed on the side of the fixed frame 211 away from the column 42, and a connecting seat 4332 installed on the left and right sides of the fixed block 4331. The clamping member 10 includes a clamping block 101 horizontally slidably connected to the bottom of the connecting seat 4332, and a clamping cylinder 102 for pushing the clamping block 101 to move. A guide cylinder 4333 is installed at the bottom of the connecting seat 4332, for the clamping block 101 to be slidably connected in the guide cylinder 4333, and one guide cylinder 4333 is assembled corresponding to one clamping block 101. A tooth block 1011 is fixed at intervals on the side of the clamping block 101 away from the clamping cylinder 102, and the side of the tooth block 1011 away from the clamping block 101 is generally in an arc structure, which is used to abut against the outer gear ring of the differential lock near the top of the differential lock. During testing, the differential lock is clamped by the clamping block 101 and the tooth block 1011 to lock the housing of the differential lock.

[0046] Reference Figure 5 and Figure 6 In addition, the pressure sensor is embedded in the clamping block 101 and the tooth block 1011. During the test, the pressure sensor abuts against the coil on the differential lock to continuously and stably output the reverse force on the differential lock. The piston rod end of the clamping cylinder 102 is fixed to the side of the clamping block 101 away from the tooth block 1011, so as to control the clamping block 101 to lock the differential lock.

[0047] Reference Figure 5 and Figure 6Furthermore, the connecting frame 433 is provided with a spline rod 11 below the pressure sensor, which is used to connect one of the half-shaft gears inside the differential lock. A fixed rod 111 is coaxially fixed to the top of the spline rod 11, and the transverse cross-section of the fixed rod 111 is generally a quadrilateral structure. The fixed block 4331 is rotatably connected to a rotating rod 12 for connecting the fixed rod 111. The rotating rod 12 is generally a cylindrical structure, and the two ends of the rotating rod 12 are respectively penetrated through the top and bottom of the fixed block 4331. A fixing groove is provided at the bottom end of the rotating rod 12 for the fixed rod 111 to be plugged in, and the size of the fixing groove is adapted to the size of the fixed rod 111. When the fixed rod 111 is located in the fixing groove, the side wall of the fixed rod 111 abuts against the inner wall of the fixing groove, and the fixed rod 111 and the rotating rod 12 and the torque sensor 9 are coaxially arranged.

[0048] Reference Figure 5 and Figure 6 Furthermore, the rotating rod 12 is coaxially equipped with a fixed sleeve 13 for mounting the fixed rod 111. The fixed sleeve 13 is penetrated with a fixing bolt 14, and the fixing bolt 14 is used to lock the fixed rod 111 and the rotating rod 12. During installation, the fixing bolt 14 is horizontally penetrated through the fixed sleeve 13, the rotating rod 12 and the fixed rod 111, that is, the two ends of the fixing bolt 14 are respectively penetrated through the outer wall of the fixed sleeve 13.

[0049] Reference Figure 5 and Figure 6 Furthermore, a mounting sleeve 15 is mounted at the bottom of the fixed block 4331. The mounting sleeve 15 and the rotating rod 12 are coaxially arranged, and when installed, the rotating rod 12 is located in the mounting sleeve 15, that is, the two ends of the rotating rod 12 are respectively passed through the top and bottom ends of the mounting sleeve 15. In addition, the mounting sleeve 15 is provided with four probes at intervals for supplying power to the differential lock.

[0050] Reference Figure 7 and Figure 8 The rotating member 44 includes a fixed seat 441 installed on the top of the lower frame 41, a receiving platform 442 rotatably connected to the fixed seat 441, a driving motor 443 for driving the receiving platform 442 to rotate, and a positioning column 444 movably provided with the receiving platform 442. Among them, the top of the receiving platform 442 is a disc structure, which is used to place the differential lock to be tested so that the test piece 43 can be moved down for testing. The driving motor 443 is installed on the fixed seat 441, and the motor shaft of the driving motor 443 and the receiving platform 442 are connected by conventional gear meshing to achieve transmission connection, which will not be described in detail here.

[0051] Reference Figure 7 and Figure 8, further, the receiving platform 442 is provided with an operating member 16 for controlling the movement of the positioning column 444. The operating member 16 includes an active rod 161 and an operating rod 162 and a driven rod 163 rotatably connected to the receiving platform 442, an active bevel gear 164 coaxially mounted at both ends of the active rod 161, a driven bevel gear 165 coaxially mounted at one end of the driven rod 163, a slider 166 threadedly connected to the driven rod 163, and a pushing bevel gear 167 coaxially mounted at one end of the operating rod 162. Among them, the axial direction of the active rod 161 is arranged vertically, and the active rod 161, the operating rod 162 and the driven rod 163 are respectively installed on the receiving platform 442 through bearing seats. The axial direction of the operating rod 162 and the axial direction of the driven rod 163 are arranged horizontally. In addition, the four driven bevel gears 165 are respectively meshed and connected with the driving bevel gear 164 , and the pushing bevel gear 167 is meshed and connected with the driving bevel gear 164 located below the driving rod 161 .

[0052] Reference Figure 7 and Figure 8 Furthermore, there are four driven rods 163, which are evenly spaced on the receiving platform 442 along the circumference of the active rod 161. The number of driven rods 163, positioning columns 444 and sliders 166 is the same, and one positioning column 444 is assembled with one slider 166, that is, the bottom end of the positioning column 444 is threadedly connected to the top of the slider 166. The top of the receiving platform 442 is provided with avoidance openings 4421 for sliding connection between the slider 166 and the positioning column 444.

[0053] Reference Figure 7 and Figure 8 Furthermore, one end of the operating rod 162 away from the active rod 161 extends out of the outer wall of the receiving platform 442, and a handle 17 is installed at this end of the operating rod 162 to manually adjust the position of the positioning column 444 on the receiving platform 442, so that the receiving platform 442 can adapt to the test of differential locks of different sizes. The receiving platform 442 is provided with a fixing member 18 for locking the operating rod 162, and the fixing member 18 is a pillar fixing clamp installed on the side wall of the receiving platform 442, and the operating rod 162 is inserted into the pillar fixing clamp.

[0054] The above components involving power supply and control are all electrically connected to the electrical cabinet for unified power supply and control to realize automated testing of the differential lock.

[0055] The implementation principle of a differential lock comprehensive test device in the embodiment of the present application is:

[0056] During the test, the feed line 2 and the loading platform 6 transport the differential lock to be tested to the jacking assembly, and the loading platform 6 is lifted by the jacking cylinder and the jacking plate 213 until the loading platform 6 is completely separated from the feed line 2. Then, the six-axis robot 31 and the clamp 33 can be used to clamp the differential lock and move it to the receiving platform 442. Insert the positioning column 444 into the bottom hole of the differential lock, and then control the motor 81 to drive the sliding frame 431 to move downward, so as to drive the entire test piece 43 to move down to the spline rod 11 and insert it into the differential lock, so as to realize the connection between the spline rod 11 and one of the half-shaft gears, and then drive the motor 443 to drive the receiving platform 442 to rotate, so as to drive the differential lock housing to operate at a certain speed. At the same time, the hysteresis brake 434 gives a certain value of load force to clamp the planetary gear in the differential lock, which can be detected by the torque sensor 9 and the pressure sensor. The obtained data is transmitted to the control system in the electrical cabinet for recording and analysis, and then it is determined whether it is a qualified product. If it is a qualified product, the robot handling component 3 will transport the differential lock to the loading platform 6 on the feeding line 2. Otherwise, it will be transported to the NG placement table 5 for placement and processing. The robot is responsible for the handling of the entire operation process, and the test piece 43 is responsible for the testing. There is no need for manual handling and testing, thereby avoiding the trouble of manual testing of the differential lock and the occurrence of inaccurate test results.

[0057] In the specific implementation of the differential lock test with a coil, it should be noted that the rotational speed of the housing of a given differential lock is set according to the parameter index of the differential. The following example takes the test of a differential lock with a rated speed of 25RPM as an example.

[0058] When the differential lock housing rotates as the active drive, the differential lock housing starts to run at a rated speed of 25RPM, and the magnetic powder brake gives a load force of 13.5NM, clamping one of the half-shaft gears. Since it is a differential function at this time, all the rotational power will be diverted to the planetary gear. When the speed of one half-shaft gear is 0, the speed of the other half-shaft gear is 25, and the planetary gear end is 25, a 10V voltage is immediately applied to the coil of the differential lock. The coil is energized to lock the differential, and the pressure sensor detects the static torque value at the coil. At the same time, the two half-shaft gears will become a state of constant speed 25RPM. The half-shaft gear with a speed of 25 always needs to be controlled by the speed, and the torque must be greater than the damping load. The qualified products are grabbed by the robot and placed on the loading platform 6 of the feeding line 2, otherwise they are placed on the NG placement platform 5.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A differential lock comprehensive test device, characterized in that: It includes a fence (1) for safety protection, a conveying line (2) for conveying a differential lock, a robot handling component (3), a testing machine component (4) and an NG placement table (5); Fences (1) are respectively provided at both ends of the feed line (2); a loading platform (6) is provided on the feed line (2) for horizontal sliding; the loading platform (6) is provided with a supporting seat (7) for placing a differential lock; the supporting seat (7) is provided with a plurality of limiting columns (72) for plugging the differential lock; and the feed line (2) is provided with a lifting component (21) for lifting the loading platform (6); The robot handling assembly (3) comprises a six-axis robot (31) for handling a differential lock, a mounting seat (32) arranged on the six-axis robot (31), and two clamping claws (33) for clamping the differential lock, wherein the clamping claws (33) are movably arranged on the mounting seat (32), and the mounting seat (32) is provided with a pneumatic part for controlling the movement of the clamping claws (33); The test machine assembly (4) comprises a lower frame (41), a column (42) arranged on the lower frame (41), a test piece (43) arranged on the column (42), and a rotating piece (44) arranged on the lower frame (41); the test piece (43) comprises a sliding frame (431) arranged on the column (42) for moving up and down, a mounting frame (432) and a connecting frame (433) arranged on the sliding plate, a hysteresis brake (434) and an electromagnetic brake (435) arranged on the mounting frame (432), and a pressure sensor (431) arranged on the connecting frame (433). The column (42) is provided with a control member (8) for controlling the movement of the sliding frame (431); the connecting frame (433) is located below the mounting frame (432); the sliding frame (431) is provided with a torque sensor (9) between the electromagnetic brake (435) and the pressure sensor; the hysteresis brake (434), the electromagnetic brake (435), the torque sensor (9) and the pressure sensor are arranged in sequence from top to bottom; the hysteresis brake (434), the electromagnetic brake (435) and the torque sensor (9) are coaxially connected; The connecting frame (433) is provided with a clamping member (10) for clamping a differential lock, and the connecting frame (433) is provided with a spline rod (11) for connecting to the differential lock below the pressure sensor, and the spline rod (11) is coaxially arranged with the torque sensor (9); The rotating member (44) comprises a fixed seat (441) arranged on the lower frame (41), a receiving platform (442) rotatably connected to the fixed seat (441), a driving motor (443) for driving the receiving platform (442) to rotate, and a positioning column (444) arranged on the receiving platform (442), wherein the positioning column (444) is used to position the differential lock, the positioning column (444) is provided in plurality and is slidably connected to the receiving platform (442), and the receiving platform (442) is provided with a control member (8) for controlling the movement of the positioning column (444).

2. A differential lock comprehensive test device according to claim 1, characterized in that: The control member (8) comprises an active rod (161) and an operating rod (162) rotatably arranged in a receiving platform (442), and a driven rod (163), an active bevel gear (164) coaxially arranged at both ends of the active rod (161), a driven bevel gear (165) coaxially arranged at one end of the driven rod (163), a pushing bevel gear (167) coaxially arranged at one end of the operating rod (162), and a slider (166) threadedly connected to the driven rod (163), the number of the driven rods (163) is the same as the number of the positioning columns (444), and the plurality of driven rods (163) are spaced apart along the circumferential direction. The slider (166) is horizontally slidably connected to the receiving platform (442), and the positioning column (444) is connected to the slider (166); the axial direction of the active rod (161) and the axial direction of the driven rod (163) are arranged perpendicular to each other, one end of the operating rod (162) extends to the outer wall of the receiving platform (442), and a fixing member (18) is arranged between the operating rod (162) and the receiving platform (442); the pushing bevel gear (167) is meshedly connected with the active bevel gear (164) located at the bottom of the active rod (161), and the active bevel gear (164) is meshedly connected with the driven bevel gear (165).

3. A differential lock comprehensive test device according to claim 1, characterized in that: The connecting frame (433) comprises a fixed block (4331) mounted on the sliding frame (431) and connecting seats (4332) arranged on both sides of the fixed block (4331); the fixed block (4331) is rotatably connected to a rotating rod (12) for mounting the spline rod (11); the rotating rod (12) and the spline rod (11) are coaxially arranged; a mounting sleeve (15) is arranged below the fixed block (4331); the rotating rod (12) and the mounting sleeve (15) are coaxially arranged and the rotating rod (12) is inserted into the mounting sleeve (15); the rotating rod (12) is coaxially provided with a fixed shaft sleeve (13) for mounting the spline rod (11); the fixed shaft sleeve (13) is provided with a fixing bolt (14) inserted into the spline rod (11).

4. A differential lock comprehensive test device according to claim 3, characterized in that: The spline rod (11) is coaxially provided with a fixing rod (111), and the bottom end of the rotating rod (12) is provided with a fixing groove for the fixing rod (111) to be inserted into. The cross section of the fixing rod (111) is a polygonal structure, and the fixing rod (111) and the fixing groove are matched.

5. A differential lock comprehensive test device according to claim 3, characterized in that: The clamping member (10) comprises a clamping block (101) horizontally slidably arranged on a connecting seat (4332), and a clamping cylinder (102) for pushing the clamping block (101) to move, wherein a piston rod of the clamping cylinder (102) is fixed to the clamp, and the pressure sensor is arranged at the clamping block (101).

6. A differential lock comprehensive test device according to claim 5, characterized in that: A tooth block (1011) for abutting against a differential lock is arranged on a side of the clamping block (101) away from the clamping cylinder (102).

7. A differential lock comprehensive test device according to claim 1, characterized in that: The lifting assembly (21) comprises a fixing frame (211) arranged on the material conveying line body (2), a lifting cylinder (212) arranged on the fixing frame (211), and a lifting plate (213) used for lifting the material loading platform (6) to completely detach from the material conveying line body (2), the piston rod of the lifting cylinder (212) and the lifting plate (213) being connected, and the lifting plate (213) being always located between the material loading platform (6) and the fixing frame (211).

8. A differential lock comprehensive test device according to claim 1, characterized in that: The pneumatic part is a clamping cylinder (321) arranged on a mounting seat (32), the number of the clamping cylinders (321) is the same as the number of the clamping claws (33), and one clamping cylinder (321) is installed corresponding to one clamping claw (33), and the clamping claw (33) is provided with a lifting plate (34) for lifting the differential lock.

Images