New energy gearbox offline detection rack and detection process method

Abstract

The invention belongs to the field of new energy gearbox test detection, and particularly relates to a new energy gearbox offline detection rack and a detection process method. The gearbox offline detection rack comprises a rack, two groups of first torque test devices symmetrically arranged on the rack, a fixing platform fixedly installed on the rack and used for fixing a gearbox to be detected, a second torque test device arranged on the fixing platform and a double-working-position test platform installed on the rack. And the two groups of first torque test devices and second torque test devices are arranged in a T shape. By arranging the two first torque testing devices and the second torque testing device, synchronous torque detection can be carried out on the two output ends of the gearbox to be detected, a differential mode can also be simulated, asynchronous torque detection of the two output ends can be carried out, the two first torque testing devices are independently controlled, and the testing efficiency is improved. The three torque test processes of the whole test bench are mutually independent and do not interfere with each other, and the function coverage is wide.

Description

Technical Field

[0001] The present invention belongs to the technical field of new energy gearbox testing, and in particular relates to a new energy gearbox off-line testing bench and a testing process method. Background Art

[0002] In the test of the gearbox, most of the time, a straight-line test bench is used to place the gearbox axially horizontally, and the output and input ends of the gearbox are subjected to torque tests, speed tests, transmission ratio tests, vibration tests, synchronous torque tests and differential torque tests, etc., while for the new energy hybrid gearbox, it includes an input end and two output ends, which are respectively located on three sides of the new energy hybrid gearbox. It is necessary to perform torque detection on the input end or the output end synchronously or asynchronously, that is, it is necessary to perform conventional synchronous torque testing and simulate the differential mode to perform differential simulation testing. Obviously, the gearbox offline test bench in the existing technology cannot meet the testing requirements of the hybrid gearbox.

[0003] Therefore, there is an urgent need for a new energy gearbox off-line test bench and test process method that is suitable for both ordinary gearboxes and new energy hybrid gearbox tests. Summary of the Invention

[0004] The purpose of the present invention is to overcome the defect in the prior art that hybrid power transmission tests cannot be carried out, and to provide a new energy transmission offline test bench and test process method that can carry out synchronous or differential torque tests and has strong adaptability.

[0005] The technical solution adopted by the present invention to solve its technical problem is: As a first aspect, a gearbox off-line test bench comprises: a frame, two sets of first torque test devices symmetrically arranged on the frame, a fixed platform fixedly mounted on the frame for fixing the gearbox to be tested, a second torque test device disposed on the fixed platform, and a dual-working position test platform mounted on the frame; the two sets of the first torque test devices and the second torque test devices are arranged in a T-shape; During the test, the gearbox to be tested is fixedly mounted on the fixed platform via a transition tooling plate, and the two first torque test devices are respectively located on both sides of the double-station test platform. The two first torque test devices and the second torque test device perform a single-side or double-side torque test on the output shaft of the gearbox to be tested; A first vibration detection component is provided on the fixed platform, and a second vibration detection component and a third vibration detection component are respectively provided on the two first torque testing devices; the first vibration detection component, the second vibration detection component and the third vibration detection component respectively perform synchronous or asynchronous vibration detection on the three sides of the gearbox to be tested.

[0006] Furthermore, the first torque testing device includes a torque testing frame slidably arranged on the frame along the X-axis direction by a horizontal moving mechanism, a first detection plate slidably mounted on the torque testing frame by a slope adjustment mechanism, a first torque testing motor fixedly mounted on the first detection plate, a first torque detection shaft coaxially arranged with an output shaft of the first torque testing motor, and a first torque meter mounted between the output shaft of the first torque testing motor and the first torque detection shaft; When in use, the first torque detection shaft is cooperatively connected to the output end of the gearbox to be detected.

[0007] Furthermore, the horizontal movement mechanism includes: Two horizontal guide rails are installed parallel to the upper end surface of the frame along the X-axis direction; A plurality of horizontal sliders are installed at the bottom of the torque test frame and are slidably engaged with the horizontal guide rails; The horizontal moving motor is installed on the frame and is located at one end of the horizontal guide rail; the horizontal moving motor drives the torque test frame through the screw nut pair The horizontal moving motor is driven by a screw-nut pair, the screw of the screw-nut pair is coaxially arranged with the output shaft of the horizontal moving motor, and the nut seat of the screw-nut pair is connected to the torque test frame.

[0008] Furthermore, the slope adjustment mechanism includes: Two front slope guide rails are obliquely arranged on both sides of the torque test frame; Two rear slope guide rails are obliquely arranged on both sides of the torque test frame and are arranged parallel to the front slope guide rail; A self-locking ramp push rod motor is fixedly mounted on the rear end of the torque test frame through a mounting bracket, and the output shaft and the self-locking shaft of the self-locking ramp push rod motor are both connected to the first detection plate; The pushing direction of the self-locking slope push rod motor is consistent with the setting direction of the front slope guide rail and / or the rear slope guide rail; the angle between the front slope guide rail or the rear slope guide rail and the horizontal plane is 25°≤a≤35°.

[0009] The ramp adjustment mechanism uses ramp motion to generate Z-axis and X-axis displacements, wherein the Z-axis displacement is used to adjust the coaxiality of the two sets of first torque test devices and compatibility with gearboxes of different types and mechanical structures, and the X-axis displacement is used to adjust the parallel movement distance of the first torque test device along the X-axis direction.

[0010] Furthermore, the fixed platform includes: A fixed frame fixedly mounted on the upper end surface of the frame and a fixed support frame slidably arranged with the fixed frame via a Y-axis moving mechanism; A fixed buckle assembly is installed on a side of the fixed support frame close to the gearbox to be tested; A torque detection hole is provided on the fixing buckle assembly and is used for the detection end of the second torque testing device to extend out.

[0011] Furthermore, the second torque testing device includes a second torque testing motor fixedly mounted on the fixed support frame, a second torque detection shaft coaxially arranged with the output shaft of the second torque testing motor, and a second torque meter arranged between the output shaft of the second torque testing motor and the second torque detection shaft. The second torque detection shaft is transmitted from the torque detection hole and cooperates with the input end of the gearbox to be tested.

[0012] Furthermore, the first vibration detection assembly includes a first vibration extension frame fixedly mounted on the upper end surface of the fixed support frame, a first vibration displacement assembly mounted at the end of the extension frame, and a first vibration detector mounted at the output end of the first vibration displacement assembly; When in use, the first vibration detector abuts against a side surface of the gearbox to be detected.

[0013] Furthermore, the first torque testing device and / or the second torque testing device are both provided with a torque calibration mechanism for calibrating the torque meter; The torque calibration mechanism provided on the second torque testing device includes: an adjustment ring coaxially provided on the second torque detection shaft, a plurality of calibration grooves arranged in a circumferential array on the outer side of the adjustment ring, a locking button mounted on a fixed support frame, a calibration support column mounted on the end of the second torque detection shaft, a calibration balance member fixedly mounted on the calibration support column, and a plurality of weights for being placed on the calibration balance member; When in use, the calibration support column is sleeved on the end of the second torque detection shaft.

[0014] Furthermore, the dual-station test platform includes: A rotating base is installed on the frame; A workbench, rotatably mounted on the rotating base; A first working position and a second working position; the first working position and the second working position are both arranged on the workbench; A working baffle, provided on the working table and located between the first working position and the second working position; When the working position needs to be changed, the rotating base drives the workbench to rotate, and the first working position, the second working position and the working baffle all rotate along with the workbench.

[0015] As a second aspect, a gearbox off-line inspection process, using a gearbox off-line inspection bench as described above, includes the following: Step 1: Perform initial torque calibration on the first torque test device and the second torque test device using a torque calibration mechanism; Step 2: Make a corresponding transition tooling plate according to the shape and structure of the surface to be tested of the gearbox to be tested; Step 3: Fix the transition tooling plate prepared in step 2 on the gearbox to be tested; and adjust the double-working position test platform to move the gearbox to be tested to the position to be tested; Step 4: Adjust the position of the fixed platform and clamp the transition tooling plate onto the fixed platform; and insert the second torque test device into the input end corresponding to the gearbox to be tested; Step 5: Start the first torque test device and connect the first torque test device to the gearbox to be tested; Step 6: Adjust the positions of the first vibration detection assembly, the second vibration detection assembly, and the third vibration detection assembly until they abut against the end surface corresponding to the gearbox to be detected; Step 7: Test the gearbox to be tested according to the set test mode; Step 8: After one gearbox test is completed, rotate the dual-working position test platform, move the next gearbox to be tested to the testing position, and repeat the process from step 4 to step 7; Step 9: Set a calibration cycle or calibration detection amount. When the calibration cycle or calibration detection amount is reached, remind the operator to calibrate the torque meter of the first torque test device and / or the second torque test device through the torque calibration mechanism. After manual calibration, repeat the process of steps 3 to 8.

[0016] Specifically, the test mode in step seven includes at least one of a basic static electrical performance test, a safety test, an oil circuit circulation test, a gear shift self-learning test, a motor external characteristic test, a series and parallel drive test, a drag torque test, an NVH test, and a differential lock function test.

[0017] The beneficial effects of the new energy gearbox off-line detection bench and detection process method of the present invention are: The present invention provides two first torque testing devices that are relatively arranged and a second torque testing device that forms a T-shaped structure with the two first torque testing devices. This can perform torque detection on the two output ends of the gearbox to be tested, and can also simulate a differential mode to perform torque detection on the two output ends. The overall layout is ingenious, and the two first torque testing devices are independently controlled, so that the three torque testing processes of the entire test bench are independent of each other and do not interfere with each other. The functional coverage is wide, and multiple test processes can be carried out simultaneously, greatly shortening the test time of a single gearbox. At the same time, the present invention adopts a dual-working position test platform. When testing the next gearbox, it is only necessary to rotate the dual-working position test platform, thereby improving the test efficiency of multiple gearboxes.

[0018] The first torque testing device of the present invention is equipped with a horizontal movement mechanism and a slope adjustment mechanism to adjust the position of the first torque detection axis in the Z and X axes, thereby being suitable for testing gearboxes of different models, sizes, and heights, further expanding the adaptability of the gearbox offline testing bench of the present invention. The slope adjustment mechanism uses a self-locking slope push rod motor, whose output shaft and self-locking shaft are both connected to the first detection plate. This not only allows the first detection plate to be adjusted in the Z and X axes, but also accurately and in real time locks the position of the first detection plate, preventing the first detection plate from shifting due to vibration during the test. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 It is a three-dimensional diagram of the gearbox off-line detection bench according to the first embodiment of the present invention.

[0021] Figure 2 It is a partial structural diagram of the gearbox off-line inspection bench according to the first embodiment of the present invention.

[0022] Figure 3 yes Figure 2 Enlarged view of point E in the middle.

[0023] Figure 4 It is a structural schematic diagram of the first torque testing device of Example 1 of the present invention.

[0024] Figure 5 yes Figure 4 Enlarged view of point E in the middle.

[0025] Figure 6 This is a schematic diagram of the rear view of the structure of the gearbox off-line inspection stand according to the first embodiment of the present invention.

[0026] Figure 7 This is an installation diagram of a dual-workstation test platform and a rack in Example 1 of the present invention.

[0027] Figure 8 It is a structural schematic diagram of the second torque testing device in Example 1 of the present invention.

[0028] Figure 9 This is an installation diagram of the torque calibration mechanism and the second torque testing device in the first embodiment of the present invention.

[0029] Figure 10 It is a structural schematic diagram of the torque calibration mechanism in Example 1 of the present invention.

[0030] Figure 11 yes Figure 10 Internal structure diagram.

[0031] Figure 12 This is a flow chart of the detection process method in Example 2 of the present invention.

[0032] In the figure: 1, frame, 2, first torque test device, 21, horizontal moving mechanism, 211, horizontal guide rail, 212, horizontal slider, 213, horizontal moving motor, 214, screw nut pair, 22, torque test frame, 23, slope adjustment mechanism, 231, front slope guide rail, 232, rear slope guide rail, 233, self-locking slope push rod motor, 24, first detection plate, 25, first torque test motor, 26, first torque detection shaft, 27, first torque meter, 3, fixed platform, 31, fixed frame, 32, Y-axis moving mechanism, 33, fixed support frame, 34, fixed buckle assembly, 4, second torque test device, 41, second torque test motor, 42, second torque detection shaft, 4 3. Second torque meter, 5. Double-working position test platform, 51. Rotating base, 52. Workbench, 53. First working position, 54. Second working position, 55. Work baffle, 6. Transition tooling plate, 7. First vibration detection assembly, 71. First vibration extension frame, 72. First vibration displacement assembly, 73. First vibration detector, 8. Second vibration detection assembly, 9. Third vibration detection assembly, 10. Torque calibration mechanism, 101. Adjusting ring, 102. Calibration groove, 103. Locking button, 104. Calibration support column, 105. Calibration balance member, 20. Gearbox, 30. Stepless hydraulic locking mechanism, 301. Locking tripod, 302. Hydraulic locking clamp, 303. L-shaped locking plate. DETAILED DESCRIPTION

[0033] The present invention will now be described in further detail with reference to the accompanying drawings, which are simplified schematic diagrams that illustrate the basic structure of the present invention in a schematic manner. Example

[0034] like Figures 1-11The illustrated embodiment of a transmission off-line test bench of the present invention includes a frame 1, two sets of first torque testing devices 2 symmetrically arranged on the frame 1, a fixed platform 3 fixedly mounted on the frame 1 for securing the hybrid transmission 20 to be tested, a second torque testing device 4 mounted on the fixed platform 3, and a dual-station test platform 5 mounted on the frame 1. The two sets of first torque testing devices 2 and second torque testing devices 4 are arranged in a T-shape. During testing, the hybrid transmission 20 to be tested is fixedly mounted on the fixed platform 3 via a transition plate 6. The two first torque testing devices 2 are located on either side of the dual-station test platform. The two first torque testing devices 2 and second torque testing devices 4 perform single-sided or double-sided torque testing on the output shaft of the hybrid transmission 20 to be tested. A first vibration detection assembly 7 is mounted on the fixed platform 3, and a second vibration detection assembly 8 and a third vibration detection assembly 9 are respectively mounted on the two first torque testing devices 2. The first vibration detection assembly 7, the second vibration detection assembly 8, and the third vibration detection assembly 9 perform synchronous or asynchronous vibration testing on three sides of the hybrid transmission 20 to be tested.

[0035] This embodiment provides two oppositely disposed first torque testing devices 2 and a second torque testing device 4 forming a T-shaped structure with the two first torque testing devices 2. This allows torque testing of the two output ends of the gearbox 20 to be tested, and also allows torque testing of the two output ends to be simulated in a differential mode. The overall layout is ingenious, and the two first torque testing devices 2 are independently controlled, so that the three torque testing processes of the entire test bench are independent of each other and do not interfere with each other. This provides a wide range of functional coverage, and allows multiple test procedures to be performed simultaneously, greatly shortening the test time of a single gearbox 20. Furthermore, the present invention uses a dual-working-position test platform 5. When testing the next gearbox 20, it is only necessary to rotate the dual-working-position test platform 5, thereby improving the test efficiency of multiple gearboxes 20.

[0036] This embodiment takes the test process of the hybrid transmission 20 as an example. Figure 4 As shown, the hybrid transmission 20 in this embodiment includes an A end face, a B end face, a C end face and a D end face, wherein the input end is arranged on the A end face, one output end is located on the B end face, and the other output end is located on the C end face.

[0037] like Figure 8 and Figure 10As shown, the fixed platform 3 in this embodiment comprises: a fixed frame 31 fixedly mounted on the upper end surface of the frame 1; a fixed support frame 33 slidably arranged with the fixed frame 31 via a Y-axis movement mechanism 32; a fixed snap assembly 34; and a torque detection hole. The fixed snap assembly 34 is mounted on the side of the fixed support frame 33 that is close to the gearbox 20 to be tested. The torque detection hole is provided on the fixed snap assembly 34 for the detection end of the second torque testing device 4 to extend.

[0038] During specific use, the transition tooling plate 6 is a specially designed mounting plate, which is used for the intermediate transition of fixing the gearbox 20 and the fixed platform 3. Specifically, the transition tooling plate 6 is adapted to the threaded hole of the gearbox 20 itself and fixedly installed on the A end face of the gearbox 20. The transition tooling plate 6 is fixedly connected to the fixed support frame 33 using the fixed snap assembly 34, thereby realizing the fixed installation of the gearbox 20 and the fixed platform 3. It should be understood that the fixed snap assembly 34 in this embodiment includes multiple snap positions, and its specific structure can adopt any structure that can fix the transition tooling plate 6 up, down, left and right. Those skilled in the art can purchase it from the market and install it adaptively. The specific structure of the fixed snap assembly 34 will not be elaborated here.

[0039] It is further explained that if Figures 4 to 6 As shown, the first torque testing device 2 in this embodiment includes a torque testing frame 22 slidably mounted on the frame 1 along the X-axis via a horizontal moving mechanism 21, a first detection plate 24 slidably mounted on the torque testing frame 22 via a slope adjustment mechanism 23, a first torque testing motor 25 fixedly mounted on the first detection plate 24, a first torque detection shaft 26 coaxially mounted with the output shaft of the first torque testing motor 25, and a first torque meter 27 mounted between the output shaft of the first torque testing motor 25 and the first torque detection shaft 26. During use, the first torque detection shaft 26 is matingly connected to the output end of the gearbox 20 to be tested. The second torque testing device 4 includes a second torque testing motor 41 fixedly mounted on the fixed support frame 33, a second torque detection shaft 42 coaxially mounted with the output shaft of the second torque testing motor 41, and a second torque meter 43 mounted between the output shaft of the second torque testing motor 41 and the second torque detection shaft 42. The second torque detection shaft 42 extends through a torque detection hole and engages with the gearbox 20 to be tested.

[0040] As a preferred embodiment, the horizontal movement mechanism 21 in this embodiment includes: two horizontal guide rails 211, a plurality of horizontal sliders 212, and a horizontal movement motor 213. Specifically, the two horizontal guide rails 211 are mounted parallel to the upper end surface of the frame 1 along the X-axis direction; the plurality of horizontal sliders 212 are mounted at the bottom of the torque test frame 22 and slideably engage with the horizontal guide rails 211; the horizontal movement motor 213 is mounted on the frame 1, located at one end of the horizontal guide rails 211; the horizontal movement motor 213 drives the torque test frame 22 through a screw-nut pair 214. The horizontal movement motor 213 is driven by the screw-nut pair 214, the screw of the screw-nut pair 214 is coaxially arranged with the output shaft of the horizontal movement motor 213, and the nut seat of the screw-nut pair 214 is connected to the torque test frame 22.

[0041] like Figure 5 and Figure 6 As shown, the slope adjustment mechanism 23 in this embodiment includes: two front slope guide rails 231, two rear slope guide rails 232, and a self-locking slope push rod motor 233. The two front slope guide rails 231 are tilted and arranged on both sides of the torque test frame 22; the two rear slope guide rails 232 are tilted and arranged on both sides of the torque test frame 22; the self-locking slope push rod motor 233 is fixedly mounted on the rear end of the torque test frame 22 via a mounting bracket, and the output shaft and self-locking shaft of the self-locking slope push rod motor 233 are both connected to the first detection plate 24. Furthermore, the pushing direction of the self-locking slope push rod motor 233 is consistent with the setting direction of the front slope guide rails 231 or the rear slope rails 232; the angle between the front slope guide rails 231 or the rear slope rails 232 and the horizontal plane is 25°≤a≤35°. In this embodiment, the angle a of the front slope guide rails 231 and / or the rear slope rails 232 relative to the torque test frame 22 is preferably set to 30°.

[0042] The ramp adjustment mechanism 23 in this embodiment uses ramp motion to generate Z-axis and X-axis displacements, wherein the Z-axis displacement is used to adjust the coaxiality of the two sets of first torque test devices 2 and compatibility with gearboxes 20 of different types and mechanical structures, and the X-axis displacement is used to adjust the parallel movement distance of the first torque test device 2 along the X-axis direction.

[0043] like Figure 8 As shown, the first vibration detection assembly 7 in this embodiment includes a first vibration extension frame 71 fixedly mounted on the upper end surface of the fixed support frame 33, a first vibration displacement assembly 72 mounted at the end of the extension frame, and a first vibration detector 73 mounted at the output end of the first vibration displacement assembly 72; when in use, the first vibration detector 73 abuts against a side surface of the gearbox 20 to be detected, that is, in this embodiment, the first vibration detector 73 abuts against the D side surface of the gearbox 20 to be detected.

[0044] It should be understood that the first vibration displacement assembly 72 in this embodiment is used to drive the first vibration detector 73 to move in the three directions of X-axis, Y-axis and Z-axis. As long as the position movement in the three directions of X-axis, Y-axis and Z-axis can be achieved, it can be applied to this embodiment. For example, a motor electric screw nut pair structure, an electric push rod structure, a telescopic cylinder structure, etc. can all be applied. No absolute limitation is made here on the specific structure of the first vibration displacement assembly 72.

[0045] As a preferred embodiment, the second vibration test assembly includes a second vibration extension frame fixedly mounted on the frame 1, a second vibration displacement assembly mounted on the second vibration extension frame, and a second vibration detector mounted at the output end of the second vibration displacement assembly. During use, the second vibration detector abuts against a side surface of the gearbox 20 to be tested. In this embodiment, the first vibration detector 73 abuts against the B side of the gearbox 20 to be tested. The third vibration test assembly includes a third vibration extension frame fixedly mounted on the frame 1, a third vibration displacement assembly mounted on the third vibration extension frame, and a third vibration detector mounted at the output end of the third vibration displacement assembly. During use, the third vibration detector abuts against a side surface of the gearbox 20 to be tested. In this embodiment, the first vibration detector 73 abuts against the C side of the gearbox 20 to be tested.

[0046] The second vibration displacement assembly and the third vibration displacement assembly in this embodiment can both adopt structures with displacement changing functions such as a motor electric screw nut pair structure, an electric push rod structure, and a telescopic cylinder structure. The specific structures of the second vibration displacement assembly and the third vibration displacement assembly are not elaborated in detail here.

[0047] The first torque testing device 2 of the present invention is equipped with a horizontal movement mechanism 21 and a slope adjustment mechanism 23 to adjust the position of the first torque detection shaft 26 in the Z-axis and X-axis directions, thereby being suitable for testing gearboxes 20 of different models, sizes, and heights, further expanding the adaptability of the gearbox offline testing bench of the present invention. The slope adjustment mechanism 23 also uses a self-locking slope push rod motor 233, whose output shaft and self-locking shaft are both connected to the first detection plate 24. This not only allows the first detection plate 24 to be adjusted in the Z-axis and X-axis directions, but also accurately and real-timely locks the position of the first detection plate 24 to prevent displacement of the first detection plate 24 due to vibration during the test.

[0048] As a preferred technical solution, Figure 7As shown, the dual-workstation test platform 5 in this embodiment includes: a rotating base 51 mounted on the frame 1, a worktable 52 rotatably mounted on the rotating base 51, a first workstation 53 and a second workstation 54 provided on the worktable 52, and a work baffle 55 provided on the worktable 52. The first workstation 53 and the second workstation 54 are located at opposite ends of the worktable 52, and the work baffle 55 is provided between the first workstation 53 and the second workstation 54. When the workstation needs to be changed, the rotating base 51 drives the worktable 52 to rotate, and the first workstation 53, the second workstation 54, and the work baffle 55 all rotate with the worktable 52.

[0049] To ensure that the workbench 52 does not shift due to external forces during transmission 20 testing, this embodiment also includes a stepless hydraulic locking mechanism 30. This mechanism comprises a locking tripod 301 fixedly mounted on the frame 1, a hydraulic locking jaw 302 mounted on the upper end of the locking tripod, and an L-shaped locking plate 303 fixedly mounted on the lower end surface of the workbench 52. The hydraulic locking jaw 302 engages with the L-shaped locking plate 303 for locking and releasing. The specific structure of the hydraulic locking jaw 302 is a reinforced version of existing small hydraulic locking jaws 302 on the market, and will not be described in detail here.

[0050] In actual gearbox 20 testing, long-term use of the torque meter will cause the torque meter to have large errors due to overload, signal drift, or mechanical looseness during use. The torque meter on the torque detection device needs to be recalibrated regularly to eliminate the errors. In the prior art, the torque meter is often disassembled and sent to a designated torque calibration device for calibration. This requires disassembly, inspection, and installation, which is time-consuming. In other words, the test bench needs to be shut down for a long time, which greatly reduces the test efficiency of the gearbox 20. To solve this problem, a torque calibration mechanism 10 is designed in this embodiment that can directly calibrate the torque meter on the test bench.

[0051] In this embodiment, the first torque testing device 2 and / or the second torque testing device 4 are both provided with a torque calibration mechanism 10 for calibrating the torque meter. They have the same structure and the same calibration method. Here, only the torque calibration mechanism 10 provided on the second torque testing device 4 is taken as an example. Those skilled in the art should be able to perform torque calibration on the torque meter provided on the first torque testing device 2 based on the description.

[0052] Specifically, the torque calibration mechanism 10 arranged on the second torque testing device 4 includes: an adjustment ring 101 coaxially arranged on the second torque detection shaft 42, a plurality of calibration grooves 102 in a circumferential array on the outside of the adjustment ring 101, a calibration support column 104 installed on the end of the second torque detection shaft 42, a locking button 103 installed on the fixed support frame 33, a calibration balance member 105 fixedly mounted on the calibration support column 104, and a plurality of weights for being set on the calibration balance member 105; when in use, the calibration support column 104 is sheathed on the end of the second torque detection shaft 42, and the calibration support column 104 rotates synchronously with the second torque detection shaft 42.

[0053] The calibration method using the torque calibration mechanism 10 specifically includes the following steps: S1: Stop the test bench and ensure that there is no gearbox 20 to be tested on the testing station; S2: Press the locking button 103 to insert the fixing button into the corresponding calibration groove 102 to limit the axial rotation of the second torque detection shaft 42; S3: After leveling the calibration balance member 105 using a spirit level, the calibration balance member 105 is mounted on the detection end of the second torque detection shaft 42 via a connecting clamping sleeve; S4: The current torque value of the torque meter is set to 0 to ensure that the torque result of the torque meter is 0 when there is no force; S5: First, hang a 10kg weight in the weight hanging hole on the balance beam of the calibration balance member 105. According to the formula M=mg*L, where M is the current torque meter display value, m is the weight mass, and L is the length of the lever arm, calculate the gravity coefficient g at the current longitude and latitude, which will be the common coefficient for subsequent calibration calculations. When the level meter used to calibrate the center of the balance member 105 does not show a horizontal state, it is necessary to use an angle ruler to measure the angle θ with the horizontal plane, and calculate g at this time according to the chord-tangent function formula M=mg*cosθ*L.

[0054] Add a 10kg weight four times, recording the torque meter values ​​M1 at 10kg, 20kg, 30kg, and 40kg, respectively. Then, using the formula M = mg * L, calculate the calculated values ​​M2 at 10kg, 20kg, 30kg, and 40kg, using the g coefficient derived from the g value in the previous steps. Calculate the difference between M2 and M1 for each value. If the difference remains within ±0.3, the torque meter is considered qualified for the test.

[0055] S5: After the calibration is completed, the calibration balance member 105 is separated from the second torque detection shaft 42 and the locking button 103 is released.

[0056] In this embodiment, when the torque meter of the test bench needs to be calibrated, there is no need to disassemble the torque meter for inspection. The test bench only needs to be shut down, and the calibration process of the torque meter can be completed in a short time. The structure is simple and reliable, which greatly improves the test efficiency of the gearbox 20. Example

[0057] This embodiment 2 provides a Figure 12 The gearbox off-line inspection test process shown uses a gearbox off-line inspection bench as described above, and includes the following: Step 1: Use the torque calibration mechanism 10 to perform initial torque calibration on the first torque test device 2 and the second torque test device 4; Step 2: Making a corresponding transition tooling plate 6 according to the shape and structure of the surface to be tested of the gearbox 20 to be tested; Step 3: Fix the transition tooling plate 6 on the gearbox to be tested 20; and adjust the double-working position test platform 5 to move the gearbox to be tested 20 to the position to be tested; Step 4: Adjust the position of the fixed platform 3 and clamp the transition tooling plate 6 onto the fixed platform 3; and insert the second torque test device 4 into the corresponding input end of the gearbox 20 to be tested; Step 5: Start the first torque testing device 2 and connect the first torque testing device 2 to the gearbox 20 to be tested; Step 6: Adjust the positions of the first vibration detection component 7, the second vibration detection component 8, and the third vibration detection component 9 until they abut against the end surface corresponding to the gearbox 20 to be detected; Step 7: Test the gearbox 20 to be tested according to the set test mode; Step 8: After the test of one gearbox 20 is completed, the dual-working position test platform 5 is rotated to move the next gearbox 20 to be tested to the testing position, and the process of steps 4 to 7 is repeated; Step nine: Set a calibration cycle or calibration detection amount. When the calibration cycle or calibration detection amount is reached, remind the operator to calibrate the torque meter of the first torque test device 2 and / or the second torque test device 4 through the torque calibration mechanism 10. After manual calibration, repeat the process of steps three to eight.

[0058] The transition tooling plate 6 in this embodiment is designed according to the specific shape of the side with the input end of the gearbox 20 to be tested. This embodiment is designed based on the A side of the gearbox 20. The fixing holes provided on the transition tooling plate 6 correspond to the holes on the A side of the gearbox 20. The holes on the gearbox 20 are used to achieve fixed installation of the transition tooling plate 6 and the gearbox 20, without the need to drill holes on the gearbox 20, thereby ensuring the original structure of the gearbox 20.

[0059] It should be further explained that the test modes in step 7 include at least one of a basic static electrical performance test, a safety test, an oil circuit circulation test, a gear shift self-learning test, a motor external characteristic test, a series and parallel drive test, a drag torque test, a NVH test, and a differential lock function test. In this embodiment, a hybrid transmission test is used as an example. The hybrid transmission includes two motors, P1 and P3. The transmission motor performance test modes include a speed sensor maximum value test, P1 / P3 motor back-EMF measurement, a P1 motor external characteristic test, a P3 motor external characteristic test, a P1 & P3 parallel drive test, an input shaft drag torque test, and a P3 motor drag torque test. The vibration detection modes include a synchronous gear shift test, an internal combustion engine NVH test, a P1 motor NVH test, a P3 motor NVH test, and a parallel NVH test.

[0060] The specific detection process in this embodiment is as follows: Before testing the gearbox 20 , the torque calibration mechanism 10 is used to perform initial torque calibration on the first torque testing device 2 and the second torque testing device 4 to ensure the detection accuracy of the torque meter.

[0061] Adjust the double-working position test platform 5, move the gearbox 20 to be tested to the position to be tested, fix the transition tooling plate 6 to the gearbox 20, and fix the fixed buckle assembly 34 on the fixed platform 3 to fix the transition tooling plate 6 on the fixed platform 3, thereby fixing the gearbox 20 on the fixed platform 3. At this time, the second torque detection shaft 42 of the second torque test device 4 is docked with the input end of the gearbox 20, and the horizontal moving mechanism 21 and the slope adjustment mechanism 23 in the two first torque test devices 2 are moved to dock the two first torque detection shafts 26 with the two corresponding output ends of the gearbox 20, and then adjust the first vibration detection component 7 and the second vibration detection component. 8 and the third vibration detection assembly 9 until they abut against the end face corresponding to the gearbox 20 to be tested, and the gearbox 20 to be tested is tested according to the set test mode. After the test of one gearbox 20 is completed, the dual-working position test platform 5 is rotated to move the next gearbox 20 to be tested to the position to be tested, and the above process is repeated. It is further explained that a calibration cycle or a calibration detection amount is also set in this embodiment. When the calibration cycle or the calibration detection amount is reached, a manual calibration is prompted to calibrate the torque meter of the first torque test device 2 and / or the second torque test device 4 through the torque calibration mechanism 10. After manual calibration, the process of steps 1 to 8 is repeated.

[0062] The detection process method for off-line detection of the gearbox 20 of the present invention can ensure both the accuracy and efficiency of detection, and has great promotion value.

[0063] It should be understood that the specific embodiments described above are only used to explain the present invention and are not intended to limit the present invention. Obvious changes or modifications derived from the spirit of the present invention are still within the scope of protection of the present invention.

Claims

1. A new energy gearbox off-line test bench, characterized in that: include: A frame, two sets of first torque testing devices symmetrically arranged on the frame, a fixed platform fixedly mounted on the frame for fixing the gearbox to be tested, a second torque testing device arranged on the fixed platform, and a double-working position test platform mounted on the frame; the two sets of the first torque testing devices and the second torque testing devices are arranged in a T-shape; During the test, the gearbox to be tested is fixedly mounted on the fixed platform via a transition tooling plate, and the two first torque test devices are respectively located on both sides of the double-station test platform. The two first torque test devices and the second torque test device perform synchronous or differential torque tests on the output end of the gearbox to be tested; A first vibration detection component is provided on the fixed platform, and a second vibration detection component and a third vibration detection component are respectively provided on the two first torque testing devices; the first vibration detection component, the second vibration detection component and the third vibration detection component respectively perform synchronous or asynchronous vibration detection on the three sides of the gearbox to be tested.

2. The new energy gearbox off-line test bench according to claim 1 is characterized in that: The first torque testing device includes a torque testing frame slidably arranged on the frame along the X-axis direction by a horizontal moving mechanism, a first detection plate slidably mounted on the torque testing frame by a slope adjustment mechanism, a first torque testing motor fixedly mounted on the first detection plate, a first torque detection shaft coaxially arranged with an output shaft of the first torque testing motor, and a first torque meter mounted between the output shaft of the first torque testing motor and the first torque detection shaft; When in use, the first torque detection shaft is cooperatively connected to the output end of the gearbox to be detected.

3. The new energy gearbox off-line test bench according to claim 2 is characterized in that: The slope adjustment mechanism comprises: Two front slope guide rails are obliquely arranged on both sides of the torque test frame; Two rear slope guide rails are obliquely arranged on both sides of the torque test frame and are arranged parallel to the front slope guide rail; A self-locking ramp push rod motor is fixedly mounted on the rear end of the torque test frame through a mounting bracket, and the output shaft and the self-locking shaft of the self-locking ramp push rod motor are both connected to the first detection plate; The pushing direction of the self-locking slope push rod motor is consistent with the setting direction of the front slope guide rail and / or the rear slope guide rail; the angle between the front slope guide rail or the rear slope guide rail and the horizontal plane is 25°≤a≤35°.

4. The new energy gearbox off-line test bench according to claim 1 is characterized in that: The fixed platform comprises: A fixed frame fixedly mounted on the upper end surface of the frame and a fixed support frame slidably arranged with the fixed frame via a Y-axis moving mechanism; A fixed buckle assembly is installed on a side of the fixed support frame close to the gearbox to be tested; A torque detection hole is provided on the fixing buckle assembly and is used for the detection end of the second torque testing device to extend out.

5. The new energy gearbox off-line test bench according to claim 4 is characterized in that: The second torque testing device includes a second torque testing motor fixedly mounted on the fixed support frame, a second torque detection shaft coaxially arranged with the output shaft of the second torque testing motor, and a second torque meter arranged between the output shaft of the second torque testing motor and the second torque detection shaft. The second torque detection shaft is transmitted from the torque detection hole and cooperates with the input end of the gearbox to be tested.

6. The new energy gearbox off-line test bench according to claim 4 is characterized in that: The first vibration detection assembly includes a first vibration extension frame fixedly mounted on the upper end surface of the fixed support frame, a first vibration displacement assembly mounted at the end of the extension frame, and a first vibration detector mounted at the output end of the first vibration displacement assembly; When in use, the first vibration detector abuts against a side surface of the gearbox to be detected.

7. The new energy gearbox off-line testing bench according to claim 5 is characterized in that: The first torque testing device and / or the second torque testing device are both provided with a torque calibration mechanism for calibrating the torque meter; The torque calibration mechanism provided on the second torque testing device includes: an adjustment ring coaxially provided on the second torque detection shaft, a plurality of calibration grooves arranged in a circumferential array on the outer side of the adjustment ring, a locking button mounted on a fixed support frame, a calibration support column mounted on the end of the second torque detection shaft, a calibration balance member fixedly mounted on the calibration support column, and a plurality of weights for being placed on the calibration balance member; When in use, the calibration support column is sleeved on the end of the second torque detection shaft.

8. The new energy gearbox off-line test bench according to claim 7 is characterized in that: The dual-station test platform includes: A rotating base is installed on the frame; A workbench, rotatably mounted on the rotating base; A first working position and a second working position; the first working position and the second working position are both arranged on the workbench; A working baffle, provided on the working table and located between the first working position and the second working position; When the working position needs to be changed, the rotating base drives the workbench to rotate, and the first working position, the second working position and the working baffle all rotate along with the workbench.

9. A new energy gearbox off-line detection process, characterized in that: A new energy gearbox off-line test bench according to any one of claims 7 or 8 is used, comprising the following contents: Step 1: Perform initial torque calibration on the first torque test device and the second torque test device using a torque calibration mechanism; Step 2: Make a corresponding transition tooling plate according to the shape and structure of the surface to be tested of the gearbox to be tested; Step 3: Fix the transition tooling plate prepared in step 2 on the gearbox to be tested; and adjust the double-working position test platform to move the gearbox to be tested to the position to be tested; Step 4: Adjust the position of the fixed platform and clamp the transition tooling plate onto the fixed platform; and insert the second torque test device into the input end corresponding to the gearbox to be tested; Step 5: Start the first torque test device and connect the first torque test device to the gearbox to be tested; Step 6: Adjust the positions of the first vibration detection assembly, the second vibration detection assembly, and the third vibration detection assembly until they abut against the end surface corresponding to the gearbox to be detected; Step 7: Test the gearbox to be tested according to the set test mode; Step 8: After one gearbox test is completed, rotate the dual-working position test platform, move the next gearbox to be tested to the testing position, and repeat the process from step 4 to step 7; Step 9: Set a calibration cycle or calibration detection amount. When the calibration cycle or calibration detection amount is reached, remind the operator to calibrate the torque meter of the first torque test device and / or the second torque test device through the torque calibration mechanism. After manual calibration, repeat the process of steps 3 to 8.

10. The detection process method for off-line detection of a new energy gearbox according to claim 9, characterized in that: The test mode in step seven includes at least one of a basic static electrical performance test, a safety test, an oil circuit circulation test, a gear shift self-learning test, a motor external characteristic test, a series and parallel drive test, a drag torque test, an NVH test, and a differential lock function test.

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