Torque detection device, field calibration method and new energy gearbox test bench

Abstract

The present application belongs to the technical field of torque detection, and particularly relates to a torque detection device, a field calibration method and a new energy gearbox test bench. The torque detection device comprises a torque detection support, a torque detection motor installed on the torque detection support, a torque detector installed on a torque detection shaft, a calibration fixing assembly arranged at an installation end of the torque detection shaft, a calibration balancing piece detachably connected with the torque detection shaft through a connecting clamping sleeve, and a plurality of weights. When torque detection is performed, the calibration balancing piece and the connecting clamping sleeve are detached from the torque detection shaft, and the torque detection shaft is butted against a workpiece to be detected. When calibration is performed, the calibration balancing piece and the torque detection shaft are coaxially arranged through the connecting clamping sleeve, and the plurality of weights are hung on the calibration balancing piece according to calibration parameters. The torque detection device can realize field calibration of the torque detector without disassembling the torque detector, and has a simple structure and reliable calibration.

Description

Technical Field

[0001] This invention belongs to the field of torque detection technology, specifically relating to a torque detection device, an on-site calibration method, and a test bench for new energy transmissions. Background Technology

[0002] Testing of new energy transmissions is an indispensable process for the transmission to roll off the production line. Specifically, the transmission undergoes basic static testing, dynamic performance testing, gear testing, synchronization testing, speed and torque testing, transmission ratio testing, and NVH vibration and noise testing to ensure the pass rate of the transmissions that roll off the production line.

[0003] When testing a transmission, a specially designed test bench is generally used. The transmission is placed on the test bench, and a torque measuring device with a torque meter is used to measure the torque at the input and output ends of the transmission. After testing a large number of transmissions or after long-term use, the torque meter may have a large error due to overload, signal drift, or mechanical loosening. It is necessary to periodically recalibrate the torque meter on the torque measuring device to eliminate the error.

[0004] In existing technologies, the torque meter is usually removed and sent to a designated torque calibration device for calibration. This process 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 testing efficiency of the gearbox. Summary of the Invention

[0005] The purpose of this invention is to overcome the shortcomings of existing technologies that require disassembling and calibrating the torque meter, which is time-consuming and results in low efficiency of gearbox testing. This invention provides a torque testing device, a field calibration method, and a test bench for new energy gearboxes that can be calibrated on-site without disassembly and with a short calibration time.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] As a first aspect, a torque detection device includes:

[0008] Torque detection bracket;

[0009] A torque detection motor is mounted on the torque detection bracket and performs torque detection on the workpiece to be tested via a torque detection shaft.

[0010] A torque meter, mounted on the torque detection shaft, is used to monitor the torque data of the torque detection shaft in real time;

[0011] A calibration fixing component is provided at the mounting end of the torque sensing shaft to limit the rotation of the torque sensing shaft;

[0012] The calibrated balance component is detachably connected to the torque detection shaft via a connecting clamping sleeve; and several weights.

[0013] When torque testing is performed, the calibration balance component and the connecting clamping sleeve are both disassembled from the torque testing shaft, and the torque testing shaft is connected to the workpiece to be tested;

[0014] During calibration, the calibration balance component and the torque detection shaft are coaxially connected by a clamping sleeve. Several weights are hung on the calibration balance component according to the calibration parameters. The calibration error is calculated based on the calibration parameters and the position of the calibration balance component to complete the calibration.

[0015] Furthermore, the calibration fixing component includes:

[0016] A fixed disk coaxially disposed outside the torque detection shaft;

[0017] A plurality of adjustment slots are arranged in a circumferential array on the outer periphery of the fixed disk;

[0018] A fixed button is installed on the torque detection bracket, and the output end of the fixed button is correspondingly engaged with the adjustment slot;

[0019] When the fixing button is pressed, the output end of the fixing button is inserted into an adjustment slot to fix the axial rotation angle of the torque detection shaft.

[0020] Furthermore, the calibration balance component includes a balance beam fixedly mounted on the connecting clamping sleeve, and a weight reduction hole and a weight hanging hole opened along the horizontal center line of the balance beam.

[0021] The balance beam is installed horizontally, and the weight is hung at one end of the balance beam.

[0022] Furthermore, the torque detection shaft is a splined shaft, and the connecting clamping sleeve is provided with splined teeth that mate with the splined shaft.

[0023] As a second aspect, a method for on-site calibration of a torque meter, employing the torque detection device capable of on-site torque calibration as described above, includes the following:

[0024] S1: Press the fixing button and insert the fixing button into the corresponding adjustment slot to restrict the axial rotation of the torque detection shaft;

[0025] S2: Install the calibration balance component on the detection end of the torque detection shaft through the connecting clamping sleeve, and use a level to adjust the calibration balance component to a horizontal state; if it cannot be adjusted to a horizontal state, the angle θ between the balance beam and the horizontal plane needs to be measured with an angle meter.

[0026] S3: By using the SetZero button on the torque meter, the current unloaded torque meter display value is set to 0, thus eliminating the torque meter's bias value display;

[0027] S4: Hang a basic weight at the end of the balance beam of length L, obtain the current torque meter reading T, and calculate the gravity coefficient g0 at the current latitude and longitude.

[0028] S5: In step S4, continue to hang weights directly below the center of gravity of the previous weight. Based on the known gravity coefficient g0 and torque formula, calculate the torque T1 under the current weight of the weight, record the torque display value T of the torque meter, and calculate the difference between T and T1.

[0029] S6: Repeat step S5 until the weights are too heavy to fit in the space.

[0030] If the calculated difference falls within the range of [+0.5, -0.5], it indicates that the torque meter calibration is complete.

[0031] S7: After calibration, disconnect the calibration balance component from the torque detection shaft and release the fixing button.

[0032] Specifically, in step S4, the calculation of the gravity coefficient g0 at the current latitude and longitude includes the following:

[0033] In step S2, when the leveling balance component is adjusted to a horizontal state using a level, the gravity coefficient g0 at the current latitude and longitude is calculated according to the torque calculation formula: T=F*r=mg0*(L / 2).

[0034] In the formula, T is the current torque meter reading; m is the mass of the weight; and L is the lever arm length.

[0035] When the angle instrument measures the angle between the balance beam and the horizontal plane as θ in step S2, the gravity coefficient g0 at the current latitude and longitude is calculated according to the torque calculation formula: T=F*r=mg0Cosθ*(L / 2);

[0036] In the formula, T is the current torque meter reading, m is the mass of the weight, L is the lever arm length, and θ is the angle between the balance beam and the horizontal plane.

[0037] As a third aspect, a new energy transmission test bench includes:

[0038] frame;

[0039] Three torque detection devices as described above are slidably mounted to the frame via a moving mechanism;

[0040] A working platform, mounted on the frame, is used to place the gearbox to be tested;

[0041] A fixed platform is set between the torque detection device and the frame, and the gearbox to be tested is fixedly set on the fixed platform through a transition tooling plate;

[0042] The three torque detection devices are arranged in a T-shape; all three torque detection shafts are oriented toward the gearbox to be tested on the working platform.

[0043] Furthermore, the working platform includes:

[0044] Rotating base;

[0045] The worktable is rotatably mounted on the rotating base;

[0046] First working position and second working position; both the first working position and the second working position are disposed on the worktable;

[0047] A continuously variable hydraulic lock assembly is installed on the frame and is used to clamp or release the worktable.

[0048] A work baffle is provided on the worktable and located between the first work position and the second work position;

[0049] When it is necessary to change the working position, the worktable disengages from the continuously variable hydraulic lock assembly, and the rotating base drives the worktable to rotate. The first working position, the second working position, and the working baffle all rotate with the worktable.

[0050] Furthermore, the continuously variable hydraulic lock assembly includes:

[0051] A locking tripod fixedly mounted on the frame;

[0052] Hydraulic locking jaws are mounted on the upper end of the locking tripod;

[0053] And an L-shaped locking plate fixedly installed on the lower end face of the workbench; the hydraulic locking jaws engage with the L-shaped locking plate for locking / unlocking.

[0054] Furthermore, the moving mechanism includes a horizontal moving mechanism mounted on the frame and a ramp moving mechanism mounted on the output end of the horizontal moving mechanism;

[0055] The ramp moving mechanism includes:

[0056] Slope-moving support with a ramp structure;

[0057] Two front ramp guide rails are inclinedly installed on both sides of the front end of the ramp moving support;

[0058] Two rear ramp guide rails are inclinedly installed on both sides of the rear end of the ramp moving support;

[0059] The self-locking ramp push rod motor is fixedly installed at the rear end of the ramp moving bracket by a mounting bracket, and the output shaft and self-locking shaft of the self-locking ramp push rod motor are both connected to the torque detection bracket;

[0060] The torque detection bracket is slidably set with the front and rear ramp guide rails via ramp sliders; the pushing direction of the self-locking ramp push rod motor is consistent with the setting direction of the front ramp guide rail and / or the rear ramp guide rail; the included angle between the front ramp guide rail and / or the rear ramp guide rail and the torque test frame is 25°≤a≤35°.

[0061] The beneficial effects of the torque detection device, on-site calibration method, and new energy transmission test bench of the present invention are as follows:

[0062] The torque detection device of the present invention includes a calibration fixing assembly at the mounting end of the torque detection shaft and a detachable calibration balancing component at the detection end of the torque detection shaft. During torque detection, both the calibration balancing component and the connecting clamping sleeve are detached from the torque detection shaft, and the torque detection shaft is aligned with the workpiece to be tested. During calibration, the calibration balancing component and the torque detection shaft are coaxially aligned via the connecting clamping sleeve. Several weights are hung on the calibration balancing component according to calibration parameters. The calibration error is calculated based on the calibration parameters and the position of the calibration balancing component, thus completing the calibration. When using the torque detection device of the present invention to detect torque in a torque meter, it is not necessary to disassemble and send the torque meter out. Simply stop the machine, fix the torque detection shaft using the calibration fixing assembly, and horizontally install the calibration balancing component at the monitoring end of the torque detection shaft for on-site torque calibration. The structure is simple, and on-site calibration of the torque meter can be achieved simultaneously with torque detection, solving the problem of time-consuming disassembly, delivery, and installation required for torque meter testing in existing technologies. Attached Figure Description

[0063] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0064] Figure 1 This is a schematic diagram of the torque detection device in an embodiment of the present invention.

[0065] Figure 2 This is a schematic diagram of the internal structure of the torque detection device in an embodiment of the present invention.

[0066] Figure 3 This is a schematic diagram of the structure of the calibration balance component in an embodiment of the present invention.

[0067] Figure 4 This is a flowchart of the calibration method for the torque detection device in an embodiment of the present invention.

[0068] Figure 5This is a schematic diagram of the structure of the new energy transmission test bench in an embodiment of the present invention.

[0069] Figure 6 yes Figure 5 Enlarged view of point A in the middle.

[0070] Figure 7 This is an installation diagram of a fixed platform and a torque detection device in an embodiment of the present invention.

[0071] Figure 8 This is an installation diagram of the working platform and the fixed platform in an embodiment of the present invention.

[0072] Figure 9 This is an installation diagram of the working platform and frame in an embodiment of the present invention.

[0073] Figure 10 yes Figure 9 Enlarged view of point B in the middle.

[0074] Figure 11 This is a partial structural schematic diagram of the new energy transmission test bench in an embodiment of the present invention.

[0075] Figure 12 This is a schematic diagram of the moving mechanism in an embodiment of the present invention.

[0076] Figure 13 yes Figure 12 Enlarged view of point C in the middle.

[0077] In the diagram: 1. Torque detection device; 11. Torque detection bracket; 12. Torque detection motor; 13. Torque detection shaft; 14. Torque meter; 15. Calibration fixing assembly; 151. Fixing plate; 152. Adjustment groove; 153. Fixing button; 16. Connecting clamping sleeve; 17. Calibration balancing component; 171. Balance beam; 172. Weight hanging hole; 2. Frame; 3. Moving mechanism; 31. Horizontal moving mechanism; 32. Inclined moving mechanism; 321. Inclined moving bracket; 322. Front 323. Inclined guide rail; 324. Rear inclined guide rail; 4. Self-locking inclined push rod motor; 4. Work platform; 41. Rotating base; 42. Worktable; 43. Stepless hydraulic lock assembly; 431. Locking triangle; 432. Hydraulic locking gripper; 433. L-shaped locking plate; 44. Work baffle; 5. Fixed platform; 51. Fixed frame; 52. Fixed platform adjustment mechanism; 53. Fixed support frame; 54. Fixed buckle assembly; 6. Transition tooling plate; 7. Gearbox; 8. Vibration detection device. Detailed Implementation

[0078] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0079] like Figures 1-3 A specific embodiment of the torque detection device 1 of the present invention shown includes a torque detection bracket 11, a torque detection motor 12, a torque meter 14, a calibration fixing assembly 15, a calibration balancing component 17, and several weights. The torque detection motor 12 is mounted on the torque detection bracket 11 and performs torque detection on the workpiece to be tested via a torque detection shaft 13. The torque meter 14 is mounted on the torque detection shaft 13 and is used to monitor the torque data of the torque detection shaft 13 in real time. The calibration fixing assembly 15 is disposed at the mounting end of the torque detection shaft 13 and is used to limit the rotation of the torque detection shaft 13. The calibration balancing component 17 is detachably connected to the torque detection shaft 13 via a connecting clamping sleeve 16.

[0080] During torque testing, both the calibration balance component 17 and the connecting clamping sleeve 16 are detached from the torque testing shaft 13, which is then aligned with the workpiece to be tested. During calibration, the calibration balance component 17 and the torque testing shaft 13 are coaxially positioned via the connecting clamping sleeve 16. Several weights are hung on the calibration balance component 17 according to calibration parameters. The calibration error is calculated based on the calibration parameters and the position of the calibration balance component 17, thus completing the calibration.

[0081] In this embodiment, the torque detection device 1 has a calibration fixing component 15 installed at the mounting end of the torque detection shaft 13, and a calibration balance component 17 detachably installed at the detection end of the torque detection shaft 13. When torque detection is performed, the calibration balance component 17 and the connecting clamping sleeve 16 are both detached from the torque detection shaft 13, and the torque detection shaft 13 is connected to the workpiece to be tested. When calibration is performed, the calibration balance component 17 and the torque detection shaft 13 are coaxially set through the connecting clamping sleeve 16. Several weights are hung on the calibration balance component 17 according to the calibration parameters. The calibration error is calculated according to the calibration parameters and the position of the calibration balance component 17, and the calibration is completed. When using the torque detection device 1 of the present invention to detect torque of torque meter 14, it is not necessary to disassemble and send torque meter 14 out. It is only necessary to stop the machine, fix the torque detection shaft 13 by calibration fixing component 15, and horizontally install calibration balance component 17 on the monitoring end of torque detection shaft 13 to perform on-site torque calibration. The structure is simple. While realizing torque detection, it can realize on-site calibration of torque meter 14, which solves the problem that the torque meter 14 detection in the prior art requires disassembly, inspection and installation, which is time-consuming.

[0082] like Figure 3 As shown, the calibration balance component 17 in this embodiment includes a balance beam 171 fixedly mounted on the connecting clamping sleeve 16, and a weight reduction hole and a weight hanging hole 172 opened along the horizontal centerline of the balance beam 171. The balance beam 171 is installed in a horizontal state, and the weight is hung on one end of the balance beam 171. Specifically, a weight is hung on the weight hanging hole 172 to calibrate the torque meter 14.

[0083] like Figure 2 As shown, the calibration fixing assembly 15 includes a fixing plate 151 coaxially disposed on the outside of the torque detection shaft 13, several adjustment slots 152 arranged around the outer periphery of the fixing plate 151, and a fixing button 153 mounted on the torque detection bracket 11. The output end of the fixing button 153 corresponds to and cooperates with the adjustment slot 152. Specifically, when the fixing button 153 is pressed, the output end of the fixing button 153 is inserted into an adjustment slot 152 to fix the axial rotation angle of the torque detection shaft 13. When the torque meter 14 calibration operation is not performed, the fixing button 153 is in the retracted state, and the fixing plate 151 rotates with the torque side shaft. When the torque meter 14 calibration operation is performed, the fixing button 153 is pressed down, and the output end of the fixing button 153 is inserted into an adjustment slot 152 on the fixing plate 151 to keep the balance beam 171 in a horizontal state as much as possible.

[0084] The length of the balance beam 171 is set to maximize its length within the operating space of the equipment in order to reduce the weight of the weights and conduct static balance tests. There is no absolute limit to the length of the balance beam 171.

[0085] In a preferred embodiment, the torque detection shaft 13 in this embodiment is a spline shaft, and the connecting clamping sleeve 16 is provided with spline teeth that cooperate with the spline shaft. The cooperation between the spline shaft and the spline teeth makes it easy to disassemble the balance beam 171 and the torque detection shaft 13 while ensuring coaxial arrangement.

[0086] Based on the on-site calibration method of the torque meter 14 of the torque detection device 1 in the above embodiments, such as Figure 4 As shown, it includes the following:

[0087] S1: Press the fixing button 153 and insert the fixing button 153 into the corresponding adjustment slot 152 to restrict the axial rotation of the torque detection shaft 13;

[0088] S2: Install the calibration balance component 17 on the detection end of the torque detection shaft 13 via the connecting clamping sleeve, and use a level to adjust the calibration balance component 17 to a horizontal state; if it cannot be adjusted to a horizontal state, the angle θ between the balance beam 171 and the horizontal plane needs to be measured with an angle meter.

[0089] S3: By using the SetZero button on the torque meter, the current unloaded torque meter display value is set to 0, thus eliminating the torque meter's bias value display. In this embodiment, the SetZero button on the torque meter is a clear button provided by the torque meter manufacturer to eliminate the torque meter's own error. Here, we are only explaining its function, which has been certified by the manufacturer.

[0090] S4: Hang a basic weight at the end of the balance beam 171 of length L, obtain the current torque meter reading T, and calculate the gravity coefficient g0 at the current latitude and longitude.

[0091] S5: In step S4, continue to hang weights directly below the center of gravity of the previous weight. Based on the known gravity coefficient g0 and the torque formula T=F*r=mg0*(L / 2), calculate the torque T1 under the current weight of the weight, record the torque display value T of the torque meter, and calculate the difference between T and T1.

[0092] S6: Repeat step S5 until the weight is so heavy that there is no more room to store it. If the calculated difference falls within the range of [+0.5, -0.5], the torque meter calibration is complete.

[0093] S7: After calibration, disconnect the calibration balance component 17 from the torque detection shaft 13 and release the fixing button 153.

[0094] In this embodiment, the base weight is 10 kg. In step S5, weights are added multiple times, with each addition being 10 kg.

[0095] Specifically, in step S4, the calculation of the gravity coefficient g0 at the current latitude and longitude includes the following: It includes two cases. When the level instrument is used to adjust the calibrated balance component 17 to a horizontal state in step S2, the gravity coefficient g0 at the current latitude and longitude is calculated according to the torque calculation formula: T=F*r=mg0*(L / 2); where T is the current torque instrument display value; m is the mass of the weight; and L is the lever arm length.

[0096] When the angle meter measures the angle between the balance beam 171 and the horizontal plane as θ in step S2, the gravity coefficient g0 at the current latitude and longitude is calculated according to the torque calculation formula: T=F*r=mg0Cosθ*(L / 2); where T is the current value displayed by the torque meter, m is the mass of the weight, L is the length of the lever arm, and θ is the angle between the balance beam and the horizontal plane.

[0097] like Figures 1-13 As shown, a test bench for a gearbox 7 based on the aforementioned torque detection device 1 includes a frame 2, three torque detection devices 1 as described above, a fixed platform 5 slidably mounted on the frame 2 via a moving mechanism 3, a working platform 4 mounted on the frame 2 for placing the gearbox 7 to be tested. The three torque detection devices 1 are arranged in a T-shape; all three torque detection shafts 13 face the gearbox 7 to be tested on the working platform 4.

[0098] like Figure 9 and Figure 10As shown, the working platform 4 in this embodiment includes: a rotating base 41, a worktable 42 rotatably mounted on the rotating base 41, a first working position and a second working position disposed on the worktable 42, a continuously variable hydraulic lock assembly 43 mounted on the frame 2, and a working baffle 44 disposed on the worktable 42. The continuously variable hydraulic lock assembly 43 is used to clamp and fix or release the worktable 42, and the working baffle 44 is located between the first working position and the second working position. When it is necessary to change the working position, the worktable 42 disengages from the continuously variable hydraulic lock assembly 43, the rotating base 41 drives the worktable 42 to rotate, and the first working position, the second working position, and the working baffle 44 all rotate with the worktable 42.

[0099] This invention, by setting up two opposing torque detection devices 1 and a torque detection device 1 forming a T-shape with the two torque detection devices 1, can detect the torque at both output ends of the gearbox 7 under test, and can also simulate differential mode to detect the torque at both output ends. The overall layout is ingenious, and the two first torque detection devices 1 are independently controlled, so that the three torque test processes of the entire test bench are independent and do not interfere with each other. The function coverage is wide, and multiple test procedures can be carried out simultaneously, which greatly shortens the test time of a single gearbox 7. At the same time, this invention adopts a dual-workstation test platform. When testing the next gearbox 7, only the dual-workstation test platform needs to be rotated, which improves the testing efficiency of multiple gearboxes 7.

[0100] To ensure that the workbench 42 will not shift in position due to external forces during the gearbox 7 test, this embodiment also includes a stepless hydraulic locking mechanism, such as... Figure 9 and Figure 10 As shown, the infinitely variable hydraulic lock assembly 43 includes a locking tripod 431 fixedly mounted on the frame 2, a hydraulic locking jaw 432 mounted on the upper end of the locking tripod, and an L-shaped locking plate 433 fixedly mounted on the lower end face of the worktable 42; the hydraulic locking jaw 432 and the L-shaped locking plate 433 engage in a locking / unlocking engagement. The specific structure of the hydraulic locking jaw 432 is a reinforced version of the commercially available small hydraulic locking jaw 432 structure; therefore, the specific structure of the hydraulic locking jaw 432 will not be described in detail here.

[0101] In this embodiment, the infinitely variable hydraulic lock assembly 43 works in conjunction with the dual-working-position work platform 4, which saves working position switching time and ensures the positional stability of the work platform 4 during testing.

[0102] The moving mechanism 3 of the gearbox 7 off-line test bench in this embodiment includes a horizontal moving mechanism 31 mounted on the frame 2 and a ramp moving mechanism 32 mounted on the output end of the horizontal moving mechanism 31.

[0103] Specifically, such as Figures 11 to 13As shown, the ramp moving mechanism 32 includes: a ramp moving bracket 321 with a ramp structure; two front ramp guide rails 322 inclinedly arranged on both sides of the front end of the ramp moving bracket 321; two rear ramp guide rails 323 inclinedly arranged on both sides of the rear end of the ramp moving bracket 321; and a self-locking ramp push rod motor 324 fixedly installed at the rear end of the ramp moving bracket 321 by a mounting bracket. The output shaft and self-locking shaft of the self-locking ramp push rod motor 324 are both connected to the torque detection bracket 11. 11. The ramp sliders are slidably set with the front ramp guide rail 322 and the rear ramp guide rail 323; the pushing direction of the self-locking ramp push rod motor 324 is consistent with the setting direction of the front ramp guide rail 322 or / and the rear ramp guide rail 323; the included angle between the front ramp guide rail 322 or / and the rear ramp guide rail 323 and the torque test frame is 25°≤a≤35°. As a preferred embodiment, the included angle between the front ramp guide rail 322 or / and the rear ramp guide rail 323 and the torque test frame is 30 degrees.

[0104] The horizontal moving mechanism 31 in this embodiment includes two horizontal guide rails, several horizontal sliders, and a horizontal moving motor. Specifically, the two horizontal guide rails are installed parallel to each other on the upper surface of the frame 21 along the X-axis; several horizontal sliders are installed at the bottom of the inclined ramp moving bracket 321 and slide in cooperation with the horizontal guide rails; the horizontal moving motor is installed on the frame 2, located at one end of the horizontal guide rails; the horizontal moving motor drives the inclined ramp moving bracket 321 through a lead screw and nut pair. The horizontal moving motor is driven by the lead screw and nut pair, the lead screw of the lead screw and nut pair are coaxially arranged with the output shaft of the horizontal moving motor, and the nut seat of the lead screw and nut pair is connected to the inclined ramp moving bracket 321.

[0105] The horizontal movement mechanism 31 and the ramp adjustment mechanism adjust the position of the torque detection shaft 13 in the Z-axis and X-axis directions, thereby adapting it to the testing of gearboxes 7 of different models, sizes, and heights, further expanding the adaptability of the gearbox 7 off-line testing bench of the present invention. Furthermore, the ramp adjustment mechanism uses a self-locking ramp push rod motor 324, whose output shaft and self-locking shaft are both connected to the torque detection bracket 11. This allows for both position adjustment of the torque detection bracket 11 in the Z-axis and X-axis directions and precise, real-time locking of the torque detection bracket 11's position, preventing displacement of the torque detection bracket 11 due to vibration during testing.

[0106] This embodiment takes the testing of a hybrid power transmission 7 as an example. To achieve the vibration test of the hybrid power transmission 7, as follows: Figure 8As shown, in this embodiment, a vibration detection device 8 for detecting the gearbox 7 is provided. The vibration detection device 8 includes a first vibration detection component, a second vibration detection component, and a third vibration detection component for detecting different end faces of the gearbox 7. The first vibration detection component includes a first vibration extension frame fixedly mounted on the upper end face of the mounting frame 2, a first vibration displacement component mounted on the end of the extension frame, and a first vibration detector mounted on the output end of the first vibration displacement component. In use, the first vibration detector abuts against one side face of the gearbox 7 to be tested.

[0107] In this embodiment, the first vibration displacement component is used to drive the first vibration detector to move in the X, Y, and Z directions. Any component that can move in the X, Y, and Z directions can be used in this embodiment. For example, a motor-electric lead screw and nut pair structure, an electric push rod structure, a telescopic cylinder structure, etc. can all be used. The specific structure of the first vibration displacement component is not absolutely limited here.

[0108] It should be understood that the structures of the second and third vibration detection components in this embodiment are the same as those of the first vibration detection component, and are used to perform vibration detection on different end faces of the gearbox 7. Their specific structures will not be described in detail.

[0109] In this embodiment, a torque detection device 1 is mounted on a fixed platform 5, such as... Figure 7 and Figure 8 As shown, the fixed platform 5 and the frame 2 are slidably connected via the moving mechanism 3. In this embodiment, the fixed platform 5 includes: a fixed frame 51 fixedly installed on the upper surface of the frame 21, a fixed support frame 53 slidably connected to the fixed frame 51 via the fixed platform adjustment mechanism 52, a fixed buckle assembly 54, and a torque detection hole. The fixed buckle assembly 54 is installed on the side of the fixed support frame 53 near the gearbox 7 to be tested. The torque detection hole is opened on the fixed buckle assembly 54, and the detection end of the corresponding torque detection device 1 extends out from the torque detection hole.

[0110] In practical applications, the torque detection devices 1 at both horizontal ends of the T-shaped structure are equipped with moving mechanisms 3 between themselves and the frame, while the torque detection device 1 at the vertical end is mounted on a fixed platform 5.

[0111] In practical use, a transition tooling plate 6 needs to be designed according to the model of the gearbox 7. The transition tooling plate 6 is a specially designed mounting plate used as an intermediate transition for fixing the gearbox 7 and the fixed platform 5. Specifically, the transition tooling plate 6 is adapted to the threaded holes of the gearbox 7 and fixedly installed on one end face of the gearbox 7. The transition tooling plate 6 is fixedly snapped to the fixed support frame 53 using the fixing buckle assembly 54, thus realizing the fixed installation of the gearbox 7 and the fixed platform 5. It should be understood that the fixing buckle assembly in this embodiment includes multiple buckle positions. Its specific structure can adopt any structure that can fix the transition tooling plate 6 in all directions. Those skilled in the art can purchase it from the market and install it adaptably. The specific structure of the fixing buckle assembly 54 will not be described in detail here.

[0112] Based on the above-mentioned method of using the gearbox 7 test bench, the following are included:

[0113] Step 1: Perform initial torque calibration on torque detection device 1;

[0114] Step 2: Make a corresponding transition tooling plate 6 according to the shape and structure of the surface to be tested of the gearbox 7, and fix the transition tooling plate 6 on the gearbox 7 to be tested.

[0115] Step 3: Adjust the work platform 4 and move the gearbox 7 to be tested to the test position;

[0116] Step 4: Move the fixed platform 5 to a new position and snap the transition tooling plate 6 onto the fixed platform 5; and insert the torque detection device 1, which is set on the fixed platform 5, into the corresponding input end of the gearbox 7 to be tested.

[0117] Step 5: Activate the remaining two torque detection devices 1 and connect them to the transmission 7 to be tested;

[0118] Step 6: Adjust the positions of the first vibration detection component, the second vibration detection component, and the third vibration detection component until they abut against the end face corresponding to the gearbox 7 to be tested;

[0119] Step 7: Conduct the test on the gearbox 7 to be tested according to the set test mode;

[0120] Step 8: After one gearbox 7 has been tested, rotate the work platform 4 to move the next gearbox 7 to be tested to the test position, and repeat the process from Step 4 to Step 7.

[0121] Step 9: Set the calibration cycle or calibration measurement quantity. When the calibration cycle or calibration measurement quantity is reached, remind the operator to manually calibrate the torque measuring instrument 14 of the torque measuring device 1. After manual calibration, repeat the process from Step 1 to Step 8.

[0122] In this embodiment, the transition tooling plate 6 is designed according to the specific shape of the side of the gearbox 7 with the input end. In this embodiment, it is designed with one end face of the gearbox 7. The fixing holes opened on the transition tooling plate 6 correspond to the holes on the end face of the gearbox 7. The transition tooling plate 6 and the gearbox 7 are fixedly installed by using the holes on the gearbox 7, without the need to drill holes on the gearbox 7, so as to preserve the original structure of the gearbox 7.

[0123] It should be further explained that the test modes in step seven include at least one of the following: basic function test mode, hydraulic system test mode, gearbox 7 motor performance test mode, vibration test mode, and differential simulation mode. In this embodiment, the test of the hybrid transmission (DHD) 7 is taken as an example. The hybrid transmission (DHD) 7 includes two motors, P1 and P2. Its gearbox 7 motor performance test modes include speed sensor maximum value test, P1 / P3 motor back EMF measurement, P1 motor external characteristic test, P3 motor external characteristic test, P1&P3 parallel drive test, input shaft drag torque test, and P3 motor drag torque test. The vibration detection modes include synchronous shifting test, internal combustion engine NVH test, P1 motor NVH test, P3 motor NVH test, and parallel NVH test.

[0124] The transmission 7 test bench of the present invention has a wide testing range. The three torque test processes of the entire test bench are independent of each other and do not interfere with each other. It has a wide functional coverage and can perform multiple test procedures at the same time, which greatly shortens the test time of a single transmission 7. It can ensure both the accuracy and efficiency of the test.

[0125] It should be understood that the specific embodiments described above are for illustrative purposes only and are not intended to limit the scope of the invention. Obvious variations or modifications derived from the spirit of the invention are still within the protection scope of the invention.

Claims

1. A torque detection device, characterized in that, include: Torque detection bracket; A torque detection motor is mounted on the torque detection bracket and performs torque detection on the workpiece to be tested via a torque detection shaft. A torque meter, mounted on the torque detection shaft, is used to monitor the torque data of the torque detection shaft in real time; A calibration fixing component is provided at the mounting end of the torque sensing shaft to limit the rotation of the torque sensing shaft; The calibrated balance component is detachably connected to the torque detection shaft via a connecting clamping sleeve; and several weights. When torque testing is performed, the calibration balance component and the connecting clamping sleeve are both disassembled from the torque testing shaft, and the torque testing shaft is connected to the workpiece to be tested; During calibration, the calibration balance component and the torque detection shaft are coaxially arranged through a connecting clamping sleeve. Several weights are hung on the calibration balance component according to the calibration parameters. The calibration error is calculated based on the calibration parameters and the position of the calibration balance component to complete the calibration. The calibration fixing component includes: A fixed disk coaxially disposed outside the torque detection shaft; A plurality of adjustment slots are arranged in a circumferential array on the outer periphery of the fixed disk; A fixed button is installed on the torque detection bracket, and the output end of the fixed button is correspondingly engaged with the adjustment slot; When the fixing button is pressed, the output end of the fixing button is inserted into an adjustment slot to fix the axial rotation angle of the torque detection shaft.

2. The torque detection device according to claim 1, characterized in that: The calibration balance component includes a balance beam fixedly mounted on the connecting clamping sleeve, and a weight reduction hole and a weight hanging hole opened along the horizontal center line of the balance beam. The balance beam is installed horizontally, and the weight is hung at one end of the balance beam.

3. The torque detection device according to claim 1, characterized in that: The torque detection shaft is a splined shaft, and the connecting clamping sleeve is provided with splined teeth that mate with the splined shaft.

4. A method for on-site calibration of a torque meter, characterized in that, The torque detection device as described in claim 3 includes the following: S1: Press the fixing button and insert the fixing button into the corresponding adjustment slot to restrict the axial rotation of the torque detection shaft; S2: Install the calibration balance component on the detection end of the torque detection shaft through the connecting clamping sleeve, and use a level to adjust the calibration balance component to a horizontal state; if it cannot be adjusted to a horizontal state, the angle θ between the balance beam and the horizontal plane needs to be measured with an angle meter. S3: By using the SetZero button on the torque meter, the current unloaded torque meter display value is set to 0, thus eliminating the torque meter's bias value display; S4: Hang a basic weight at the end of the balance beam of length L, obtain the current torque meter reading T, and calculate the gravity coefficient g0 at the current latitude and longitude. S5: In step S4, continue to hang weights directly below the center of gravity of the previous weight. Based on the known gravity coefficient g0 and torque formula, calculate the torque T1 under the current weight of the weight, record the torque display value T of the torque meter, and calculate the difference between T and T1. S6: Repeat step S5 until the weight of the weights is so heavy that there is no more space to store them. If the calculated difference value falls within the range of [+0.5, -0.5], then the torque meter calibration is complete. S7: After calibration, disconnect the calibration balance component from the torque detection shaft and release the fixing button.

5. The method for on-site calibration of a torque meter according to claim 4, characterized in that: In step S4, the calculation of the gravity coefficient g0 at the current latitude and longitude includes the following: In step S2, when the leveling balance component is adjusted to a horizontal state using a level, the gravity coefficient g0 at the current latitude and longitude is calculated according to the torque calculation formula: T=F*r=mg0*(L / 2). In the formula, T is the current torque meter reading; m is the mass of the weight; and L is the lever arm length. When the angle instrument measures the angle between the balance beam and the horizontal plane as θ in step S2, the gravity coefficient g0 at the current latitude and longitude is calculated according to the torque calculation formula: T=F*r=mg0Cosθ*(L / 2). In the formula, T is the current torque meter reading, m is the mass of the weight, L is the lever arm length, and θ is the angle between the balance beam and the horizontal plane.

6. A test bench for a new energy transmission, characterized in that, include: frame; Three torque detection devices as described in any one of claims 1-3 are slidably mounted to the frame via a moving mechanism; A working platform, mounted on the frame, is used to place the gearbox to be tested; A fixed platform is set between the torque detection device and the frame, and the gearbox to be tested is fixedly set on the fixed platform through a transition tooling plate; The three torque detection devices are arranged in a T-shape; all three torque detection shafts are oriented toward the gearbox to be tested on the working platform.

7. A test bench for a new energy transmission according to claim 6, characterized in that: The working platform includes: Rotating base; The worktable is rotatably mounted on the rotating base; First working position and second working position; both the first working position and the second working position are disposed on the worktable; A continuously variable hydraulic lock assembly is installed on the frame and is used to clamp or release the worktable. A work baffle is provided on the worktable and located between the first work position and the second work position; When it is necessary to change the working position, the worktable disengages from the continuously variable hydraulic lock assembly, and the rotating base drives the worktable to rotate. The first working position, the second working position, and the working baffle all rotate with the worktable.

8. A test bench for a new energy transmission according to claim 7, characterized in that, The continuously variable hydraulic lock assembly includes: A locking tripod fixedly mounted on the frame; Hydraulic locking jaws are mounted on the upper end of the locking tripod; And an L-shaped locking plate fixedly installed on the lower end face of the workbench; the hydraulic locking jaws engage with the L-shaped locking plate for locking / unlocking.

9. A new energy transmission test bench according to claim 6, characterized in that, The moving mechanism includes a horizontal moving mechanism mounted on the frame and a ramp moving mechanism mounted on the output end of the horizontal moving mechanism; The ramp moving mechanism includes: Slope-moving support with a ramp structure; Two front ramp guide rails are inclinedly installed on both sides of the front end of the ramp moving support; Two rear ramp guide rails are inclinedly installed on both sides of the rear end of the ramp moving support; The self-locking ramp push rod motor is fixedly installed at the rear end of the ramp moving bracket by a mounting bracket, and the output shaft and self-locking shaft of the self-locking ramp push rod motor are both connected to the torque detection bracket; The torque detection bracket is slidably set with the front and rear ramp guide rails via ramp sliders; the pushing direction of the self-locking ramp push rod motor is consistent with the setting direction of the front ramp guide rail and / or the rear ramp guide rail; the included angle between the front ramp guide rail and / or the rear ramp guide rail and the torque test frame is 25°≤a≤35°.

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