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

Abstract

The invention 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 bed. The torque detection device comprises a torque detection support. The torque detection motor is installed on the torque detection support. The torque meter is mounted on the torque detection shaft; the calibration fixing assembly is arranged at the mounting end of the torque detection shaft; the calibration balance member is detachably connected with the torque detection shaft through the connection holding sleeve. And a plurality of weights. When torque detection is carried out, the calibration balance piece and the connection holding sleeve are both detached from the torque detection shaft, and the torque detection shaft is in butt joint with a workpiece to be detected. When calibration operation is carried out, the calibration balance piece and the torque detection shaft are coaxially arranged through the connection holding sleeve, and a plurality of weights are hung on the calibration balance piece according to calibration parameters. According to the torque detection device, field calibration of the torque meter can be achieved, the torque meter does not need to be disassembled, the structure is simple, and calibration is reliable.

Description

Technical Field

[0001] The present invention belongs to the technical field of torque detection, and in particular relates to a torque detection device, an on-site calibration method and a new energy transmission test bench. Background Art

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

[0003] When testing a gearbox, a specially designed test bench is generally used. The gearbox is placed on the test bench, and a torque detection device with a torque meter is used to detect torque at the input and output ends of the gearbox. After testing a large number of gearboxes or long-term use, the torque meter may have large errors due to overload, signal drift, or mechanical looseness. It is necessary to regularly recalibrate the torque meter on the torque detection device to eliminate the error.

[0004] In the prior art, the torque meter is usually 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. Summary of the Invention

[0005] The purpose of the present invention is to overcome the defects in the prior art that the torque meter needs to be disassembled and calibrated, the calibration takes a long time, and the efficiency of gearbox testing is low. The present invention provides a torque detection device, an on-site calibration method and a new energy gearbox test bench that do not require disassembly and have a short calibration time, and can calibrate the torque meter on site.

[0006] The technical solution adopted by the present 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 detected through a torque detection shaft;

[0010] a torque meter, mounted on the torque detection shaft, for monitoring the torque data of the torque detection shaft in real time;

[0011] a calibration fixing assembly, provided at the mounting end of the torque detection shaft, for limiting the rotation of the torque detection shaft;

[0012] a calibration balance piece, detachably connected to the torque detection shaft via a connecting clamp; and a plurality of weights;

[0013] When performing torque testing, the calibration balance piece and the connection clamping sleeve are removed from the torque testing shaft, and the torque testing shaft is docked with the workpiece to be tested;

[0014] When performing calibration operation, the calibration balance piece and the torque detection shaft are coaxially arranged through a connecting clamping sleeve, and a number of weights are hung on the calibration balance piece according to the calibration parameters. The calibration error is calculated according to the calibration parameters and the position of the calibration balance piece to complete the calibration.

[0015] Furthermore, the calibration fixing component includes:

[0016] a fixed disk coaxially arranged on the outer side of the torque detection shaft;

[0017] A plurality of adjustment grooves, wherein the plurality of adjustment grooves are arranged in a circular array on the outer circumference of the fixed plate;

[0018] A fixed button is mounted on the torque detection bracket, and an output end of the fixed button corresponds to and cooperates with the adjustment slot;

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

[0020] Furthermore, the calibration balance member includes a balance beam fixedly arranged on the connecting and clamping sleeve, and a weight reduction hole and a weight hanging hole opened along the horizontal midline of the balance beam;

[0021] The balance beam is installed in a horizontal state, and the weight is hung on one end of the balance beam.

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

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

[0024] S1: Pressing a fixing button to insert the fixing button into the corresponding adjustment slot to limit the axial rotation of the torque detection shaft;

[0025] S2: Install the calibration balance piece on the detection end of the torque detection shaft through the connecting clamp, and use a spirit level to adjust the calibration balance piece to a horizontal state; if it cannot be adjusted to a horizontal state, use an inclinometer to measure the angle θ between the balance beam and the horizontal plane;

[0026] S3: Press the SetZero button on the torque meter to set the torque meter display value to 0 when there is no force applied, eliminating the offset value display of the torque meter.

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

[0028] S5: Hang a weight just below the center of gravity of the previous weight in step S4, calculate the torque T1 under the current weight based on the known gravity coefficient g0 and the torque formula, record the torque value T displayed by the torque meter, and calculate the difference between T and T1;

[0029] S6: Repeat step S5 until the weight of the weights is too heavy to store in the space.

[0030] If the calculated difference value falls within the range of [+0.5, -0.5], the torque meter calibration is completed.

[0031] S7: After the calibration is completed, the calibration balance piece is separated from the torque detection shaft and the fixing button is released.

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

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

[0034] Where, T is the current torque meter display value; m is the mass of the weight; L is the length of the force arm;

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

[0036] Where T is the current torque meter display value, m is the mass of the weight, L is the length of the force arm, 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 on the frame via a moving mechanism;

[0040] A working platform, mounted on the frame, for placing the gearbox to be inspected;

[0041] A fixed platform is provided between one of the torque detection devices and the frame, and the gearbox to be detected is fixed on the fixed platform via a transition tooling plate;

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

[0043] Furthermore, the working platform includes:

[0044] swivel base;

[0045] A workbench, rotatably mounted on the rotating base;

[0046] A first working position and a second working position; the first working position and the second working position are both arranged on the workbench;

[0047] a stepless hydraulic lock assembly, mounted on the frame, for clamping or releasing the workbench;

[0048] A working baffle, provided on the working table and located between the first working position and the second working position;

[0049] When the working position needs to be changed, the workbench is disengaged from the stepless hydraulic lock assembly, 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.

[0050] Furthermore, the stepless hydraulic lock assembly includes:

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

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

[0053] And an L-shaped locking plate fixedly mounted on the lower end surface of the workbench; the hydraulic locking clamp cooperates with the L-shaped locking plate for locking / loosening.

[0054] Furthermore, the moving mechanism includes a horizontal moving mechanism installed on the frame and a slope moving mechanism installed at the output end of the horizontal moving mechanism;

[0055] The slope movement mechanism comprises:

[0056] A slope movable support with a slope structure;

[0057] Two front slope guide rails are obliquely arranged on both sides of the front end of the slope movable bracket;

[0058] Two rear slope guide rails are obliquely arranged on both sides of the rear end of the slope movable bracket;

[0059] A self-locking slope push rod motor is fixedly mounted on the rear end of the slope moving bracket through a mounting bracket, and the output shaft and self-locking shaft of the self-locking slope push rod motor are both connected to the torque detection bracket;

[0060] The torque detection bracket is slidably arranged with the front ramp guide rail and the rear ramp guide rail through a ramp slider; 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 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:

[0062] The torque detection device of the present invention is provided with a calibration fixing assembly at the mounting end of the torque detection shaft, and a calibration balance piece is detachably provided at the detection end of the torque detection shaft. When torque detection is performed, the calibration balance piece and the connecting clamping sleeve are both removed from the torque detection shaft, and the torque detection shaft is docked with the workpiece to be detected. When the calibration operation is performed, the calibration balance piece and the torque detection shaft are coaxially arranged through the connecting clamping sleeve, and a plurality of weights are hung on the calibration balance piece according to the calibration parameters. The calibration error is calculated according to the calibration parameters and the position of the calibration balance piece to complete the calibration. When the torque detection device of the present invention is used to perform torque detection on a torque meter, it is not necessary to disassemble and send out the torque meter. It is only necessary to stop the machine, fix the torque detection shaft through the calibration fixing assembly, and horizontally install the calibration balance piece on the monitoring end of the torque detection shaft to perform on-site torque calibration. The structure is simple, and on-site calibration of the torque meter can be achieved while achieving torque detection, thereby solving the problem in the prior art that the torque meter detection requires disassembly, inspection, and installation, which is time-consuming. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0064] Figure 1 2 is a schematic structural diagram of a torque detection device in an embodiment of the present invention.

[0065] Figure 2 Schematic diagram of the internal structure of the torque detection device in an embodiment of the present invention.

[0066] Figure 3 2 is a schematic structural diagram of a calibration balance member in an embodiment of the present invention.

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

[0068] Figure 5It is a structural schematic diagram of the new energy gearbox 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 1 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 1 is an installation diagram of the working platform and the 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 It is a partial structural diagram of the new energy gearbox test bench in an embodiment of the present invention.

[0075] Figure 12 Schematic diagram of the structure 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 figure: 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 slot, 153. Fixing button, 16. Connecting clamping sleeve, 17. Calibration balance piece, 171. Balance beam, 172. Weight hanging hole, 2. Rack, 3. Moving mechanism, 31. Horizontal moving mechanism, 32. Slope moving mechanism, 321. Slope moving bracket, 322. Front Ramp guide rail, 323, rear ramp guide rail, 324, self-locking ramp push rod motor, 4, working platform, 41, rotating base, 42, workbench, 43, stepless hydraulic lock assembly, 431, locking tripod, 432, hydraulic locking clamp, 433, L-shaped locking plate, 44, working 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 DESCRIPTION

[0078] 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.

[0079] like Figure 1-Figure 3 The specific embodiment of a 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 balance 17 and a number of weights, wherein the torque detection motor 12 is installed on the torque detection bracket 11, and torque detection is performed on the workpiece to be detected through the torque detection shaft 13. The torque meter 14 is installed on the torque detection shaft 13 for real-time monitoring of the torque data of the torque detection shaft 13; the calibration fixing assembly 15 is arranged at the mounting end of the torque detection shaft 13 for limiting the rotation of the torque detection shaft 13; the calibration balance 17 is detachably connected to the torque detection shaft 13 by connecting the clamping sleeve 16.

[0080] When performing torque testing, the calibration balance 17 and the connecting and clamping sleeve 16 are removed from the torque detection shaft 13, and the torque detection shaft 13 is docked with the workpiece to be tested. During calibration, the calibration balance 17 is coaxially arranged with the torque detection shaft 13 via the connecting and clamping sleeve 16. Several weights are hung on the calibration balance 17 according to the calibration parameters. The calibration error is calculated based on the calibration parameters and the position of the calibration balance 17, completing the calibration.

[0081] The torque detection device 1 in this embodiment is provided with a calibration fixing assembly 15 at the mounting end of the torque detection shaft 13, and a calibration balance piece 17 is detachably provided at the detection end of the torque detection shaft 13. When torque detection is performed, the calibration balance piece 17 and the connecting clamping sleeve 16 are both removed from the torque detection shaft 13, and the torque detection shaft 13 is docked with the workpiece to be detected. When the calibration operation is performed, the calibration balance piece 17 and the torque detection shaft 13 are coaxially arranged through the connecting clamping sleeve 16, and a number of weights are hung on the calibration balance piece 17 according to the calibration parameters. The calibration error is calculated according to the calibration parameters and the position of the calibration balance piece 17 to complete the calibration. When the torque detection device 1 of the present invention is used to perform torque detection on the torque meter 14, there is no need to disassemble and send out the torque meter 14. It only needs to stop the machine, fix the torque detection shaft 13 through the calibration fixing component 15, and horizontally install the calibration balance member 17 on the monitoring end of the torque detection shaft 13 to perform on-site torque calibration. The structure is simple, and while realizing torque detection, on-site calibration of the torque meter 14 can be realized, which solves the problem in the prior art that the torque meter 14 needs to be disassembled, sent for inspection, and installed, which is time-consuming.

[0082] like Figure 3 As shown, the calibration balance member 17 in this embodiment includes a balance beam 171 fixedly mounted on the connection clamping sleeve 16, and a weight-reducing hole and a weight-hanging hole 172 defined along the horizontal midline of the balance beam 171. The balance beam 171 is installed in a horizontal position, and a weight is hung at one end of the balance beam 171. Specifically, a weight is hung in 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 arranged outside the torque detection shaft 13, a plurality of adjustment slots 152 arranged circumferentially 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 engages with the adjustment slots 152. Specifically, when the fixing button 153 is pressed, the output end of the fixing button 153 inserts into one of the adjustment slots 152, thereby fixing the axial rotation angle of the torque detection shaft 13. When the torque meter 14 is not being calibrated, the fixing button 153 is retracted, and the fixing plate 151 rotates with the torque-side shaft. When the torque meter 14 is being calibrated, the fixing button 153 is pressed downward, and the output end of the fixing button 153 inserts into one of the adjustment slots 152 on the fixing plate 151, thereby maintaining the balance beam 171 in a horizontal state as much as possible.

[0084] The length of the balance beam 171 is set to be as long as possible within the operating space of the equipment to reduce the weight of the weight and perform a static balance test. There is no absolute limit on the length of the balance beam 171.

[0085] As a preferred embodiment, the torque detection shaft 13 in this embodiment is a spline shaft, and spline teeth that cooperate with the spline shaft are provided in the connecting clamping sleeve 16. 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 a coaxial setting.

[0086] Based on the on-site calibration method of the torque meter 14 of the torque detection device 1 in the above embodiment, Figure 4 As shown, including the following:

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

[0088] S2: Install the calibration balance member 17 on the detection end of the torque detection shaft 13 by connecting the clamping sleeve, and use a spirit level to adjust the calibration balance member 17 to a horizontal state; if it cannot be adjusted to a horizontal state, use an inclinometer to measure the angle θ between the balance beam 171 and the horizontal plane;

[0089] S3: Use the SetZero button on the torque meter to set the current unloaded torque meter display value to 0, eliminating the offset value display of the torque meter. In this embodiment, the SetZero button of the torque meter is a clear button set by the torque meter manufacturer to eliminate the error of the torque meter itself. Its function is only explained here and is certified by the manufacturer.

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

[0091] S5: Hang a weight directly below the center of gravity of the previous weight in step S4, calculate the torque T1 under the current weight based on the known gravity coefficient g0 and the torque formula T = F*r = mg0*(L / 2), record the torque value T displayed by the torque meter, and calculate the difference between T and T1;

[0092] S6: Repeat step S5 until the weight is too heavy to store. If the calculated difference falls within the range of [+0.5, -0.5], the torque meter calibration is complete.

[0093] S7: After the calibration is completed, the calibration balance member 17 is separated from the torque detection shaft 13 and the fixing button 153 is released.

[0094] In this embodiment, the basic weight is 10 kg. In step S5, weights are added multiple times, and each time the weight added is 10 kg.

[0095] Specifically, in step S4, the calculation of the gravity coefficient g0 at the current longitude and latitude includes the following contents: it includes two situations. When the calibration balance member 17 is adjusted to a horizontal state using a spirit level in step S2, the gravity coefficient g0 at the current longitude and latitude is calculated according to the torque calculation formula: T=F*r=mg0*(L / 2); wherein the T value is the current torque meter display value; m is the mass of the weight; and L is the length of the lever arm.

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

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

[0098] like Figure 9 and Figure 10As shown, the work platform 4 in this embodiment includes: a rotating base 41, a work table 42 rotatably mounted on the rotating base 41, a first working position and a second working position provided on the work table 42, a stepless hydraulic lock assembly 43 mounted on the frame 2, and a work baffle 44 provided on the work table 42. The stepless hydraulic lock assembly 43 is used to clamp or release the work table 42, and the work baffle 44 is located between the first working position and the second working position. When the working position needs to be changed, the work table 42 is disengaged from the stepless hydraulic lock assembly 43, the rotating base 41 drives the work table 42 to rotate, and the first working position, the second working position, and the work baffle 44 all rotate with the work table 42.

[0099] The present invention provides two relatively arranged torque detection devices 1 and a torque detection device 1 forming a T-shaped structure with the two torque detection devices 1, so that torque detection can be performed on the two output ends of the gearbox 7 to be detected, and the differential mode can be simulated to perform torque detection on the two 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 of each other and do not interfere with each other. The functional coverage is wide, and multiple test processes can be carried out simultaneously, which greatly shortens the test time of a single gearbox 7. At the same time, the present invention adopts a dual-working position test platform. When performing the detection of the next gearbox 7, it is only necessary to rotate the dual-working position test platform, thereby improving the test efficiency of multiple gearboxes 7.

[0100] In order to ensure that the working platform 42 will not be offset due to external forces during the test of the gearbox 7, a stepless hydraulic locking mechanism is also provided in this embodiment. Figure 9 and Figure 10 As shown, the stepless 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 surface of the workbench 42. The hydraulic locking jaw 432 and the L-shaped locking plate 433 engage and release the hydraulic locking jaw. The specific structure of the hydraulic locking jaw 432 is a reinforced structure of the small hydraulic locking jaw 432 on the market, and the detailed structure of the hydraulic locking jaw 432 is not described here.

[0101] In this embodiment, the stepless hydraulic lock assembly 43 cooperates with the dual-working-position working platform 4, which saves the working-position switching time and ensures the position stability of the working 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 installed on the frame 2 and a slope moving mechanism 32 installed at the output end of the horizontal moving mechanism 31 .

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

[0104] The horizontal movement mechanism 31 in this embodiment includes two horizontal guide rails, a plurality of horizontal sliders, and a horizontal movement motor. Specifically, the two horizontal guide rails are mounted parallel to the upper end surface of the frame 21 along the X-axis. The plurality of horizontal sliders are mounted at the bottom of the torsion ramp movable bracket 321 and slide in engagement with the horizontal guide rails. The horizontal movement motor is mounted on the frame 2, at one end of the horizontal guide rails. The horizontal movement motor drives the ramp movable bracket 321 via a screw-nut pair. The horizontal movement motor is driven by a screw-nut pair, the screw of which is coaxial with the output shaft of the horizontal movement motor, and the nut seat of which is connected to the ramp movable bracket 321.

[0105] The horizontal movement mechanism 31 and the slope adjustment mechanism adjust the position of the torque detection shaft 13 in the Z-axis and X-axis directions, thereby accommodating the testing of gearboxes 7 of different models, sizes, and heights, further expanding the adaptability of the present invention's off-line testing rig for gearboxes 7. Furthermore, the slope adjustment mechanism utilizes a self-locking slope push rod motor 324, whose output shaft and self-locking shaft are both connected to the torque detection bracket 11. This not only adjusts the position of the torque detection bracket 11 in the Z-axis and X-axis directions, but also accurately and in real time locks the position of the torque detection bracket 11, preventing displacement of the torque detection bracket 11 due to vibration during testing.

[0106] This embodiment takes the test of the hybrid transmission 7 as an example, in order to realize the vibration test of the hybrid transmission 7, as shown in FIG. 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 surfaces of the gearbox 7. The first vibration detection component includes a first vibration extension frame fixed to the upper end surface of the mounting frame 2, a first vibration displacement component installed at the end of the extension frame, and a first vibration detector installed at the output end of the first vibration displacement component. When in use, the first vibration detector abuts against a side surface of the gearbox 7 to be detected.

[0107] The first vibration displacement assembly in this embodiment is used to drive the first vibration detector 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.

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

[0109] In this embodiment, a torque detection device 1 is mounted on a fixed platform 5. Figure 7 and Figure 8 As shown, the fixed platform 5 slides with the frame 2 via a moving mechanism 3. In this embodiment, the fixed platform 5 comprises a fixed frame 51 fixedly mounted on the upper end surface of the frame 21, a fixed support frame 53 slidably coupled to the fixed frame 51 via a fixed platform adjustment mechanism 52, a fixed buckle assembly 54, and a torque detection hole. The fixed buckle assembly 54 is mounted on the side of the fixed support frame 53 proximal to the gearbox 7 to be tested. The torque detection hole is formed on the fixed buckle assembly 54, and the detection end of the corresponding torque detection device 1 extends from the torque detection hole.

[0110] In actual applications, a moving mechanism 3 is provided between the torque detection device 1 and the frame at both horizontal ends of the T-shaped structure, while the torque detection device 1 at the vertical end is provided on a fixed platform 5 .

[0111] During specific use, a transition tooling plate 6 must also be designed according to the model of the gearbox 7. The transition tooling plate 6 is a specially designed mounting plate used for the intermediate transition between the gearbox 7 and the fixed platform 5. Specifically, the transition tooling plate 6 is adapted to the threaded holes of the gearbox 7 itself and fixedly mounted on one end face of the gearbox 7. The transition tooling plate 6 is fixedly connected to the fixed support frame 53 using a fixed snap assembly 54, thereby achieving fixed installation of the gearbox 7 and the fixed platform 5. It should be understood that the fixed snap assembly in this embodiment includes a plurality of 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 54 will not be elaborated on here.

[0112] The method of using the gearbox 7 test bench mentioned above includes the following:

[0113] Step 1: Perform initial torque calibration on the 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 to be tested, and fix the transition tooling plate 6 on the gearbox 7 to be tested;

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

[0116] Step 4: Move the fixed platform 5 and fix the transition tooling plate 6 on the fixed platform 5; and insert the torque detection device 1 set on the fixed platform 5 into the corresponding input end of the gearbox 7 to be detected;

[0117] Step 5: Start the remaining two torque detection devices 1 and connect them to the gearbox 7 to be detected;

[0118] 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 7 to be detected;

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

[0120] Step 8: After the test of one gearbox 7 is completed, the working platform 4 is rotated to move the next gearbox 7 to be tested to the position to be tested, and the process from step 4 to step 7 is repeated;

[0121] Step nine: Set a calibration cycle or calibration detection amount. When the calibration cycle or calibration detection amount is reached, remind the manual calibration of the torque meter 14 of the torque detection device 1. After manual calibration, repeat the process of steps one to eight.

[0122] The transition plate 6 in this embodiment is designed according to the specific shape of the side with the input end of the gearbox 7 to be tested. This embodiment is designed based on one end face of the gearbox 7. The fixing holes provided on the transition plate 6 correspond to the holes on the end face of the gearbox 7. The holes on the gearbox 7 are used to achieve fixed installation of the transition plate 6 and the gearbox 7, without the need to drill holes on the gearbox 7, thereby ensuring the original structure of the gearbox 7.

[0123] It should be further explained that the test mode in step 7 includes at least one of a basic function test mode, a hydraulic system test mode, a gearbox 7 motor performance test mode, a vibration test mode, and a differential simulation mode. In this embodiment, the test of the hybrid power transmission (DHD) 7 is taken as an example. The hybrid power transmission (DHD) 7 includes two motors, P1 and P2. The gearbox 7 motor performance test mode includes a speed sensor maximum value test, a P1 / P3 motor back electromotive force 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 mode includes a synchronous shift test, an internal combustion engine NVH test, a P1 motor NVH test, a P3 motor NVH test, and a parallel NVH test.

[0124] The gearbox 7 test bench of the present invention has a wide detection range. The three torque test 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, which greatly shortens the test time of a single gearbox 7 and can ensure both the accuracy and efficiency of the detection.

[0125] 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 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 detected through a torque detection shaft; a torque meter, mounted on the torque detection shaft, for monitoring the torque data of the torque detection shaft in real time; a calibration fixing assembly, provided at the mounting end of the torque detection shaft, for limiting the rotation of the torque detection shaft; a calibration balance piece, detachably connected to the torque detection shaft via a connecting clamp; and a plurality of weights; When performing torque testing, the calibration balance piece and the connection clamping sleeve are removed from the torque testing shaft, and the torque testing shaft is docked with the workpiece to be tested; When performing calibration operation, the calibration balance piece and the torque detection shaft are coaxially arranged through a connecting clamping sleeve, and a number of weights are hung on the calibration balance piece according to the calibration parameters. The calibration error is calculated according to the calibration parameters and the position of the calibration balance piece to complete the calibration.

2. A torque detection device according to claim 1, characterized in that: The calibration fixing assembly includes: a fixed disk coaxially arranged on the outer side of the torque detection shaft; A plurality of adjustment grooves, wherein the plurality of adjustment grooves are arranged in a circular array on the outer circumference of the fixed plate; A fixed button is mounted on the torque detection bracket, and an output end of the fixed button corresponds to and cooperates with the adjustment slot; When the fixing button is pressed, the output end of the fixing button is inserted into one of the adjustment slots to fix the axial rotation angle of the torque detection shaft.

3. A torque detection device according to claim 2, characterized in that: The calibration balance member includes a balance beam fixedly arranged on the connecting and holding sleeve, and a weight reduction hole and a weight hanging hole opened along the horizontal midline of the balance beam; The balance beam is installed in a horizontal state, and the weight is hung on one end of the balance beam.

4. A torque detection device according to claim 2, characterized in that: The torque detection shaft is a spline shaft, and the connecting clamping sleeve is provided with spline teeth that match the spline shaft.

5. A method for on-site calibration of a torque meter, characterized in that: The torque detection device capable of on-site torque calibration as described in claim 3 or 4 includes the following contents: S1: Pressing a fixing button to insert the fixing button into the corresponding adjustment slot to limit the axial rotation of the torque detection shaft; S1: Pressing a fixing button to insert the fixing button into the corresponding adjustment slot to limit the axial rotation of the torque detection shaft; S2: Install the calibration balance piece on the detection end of the torque detection shaft through the connecting clamp, and use a spirit level to adjust the calibration balance piece to a horizontal state; if it cannot be adjusted to a horizontal state, use an inclinometer to measure the angle θ between the balance beam and the horizontal plane; S3: Press the SetZero button on the torque meter to set the torque meter display value to 0 when there is no force applied, eliminating the offset value display of the torque meter. S4: Hang a basic weight at the end of a balance beam of length L, obtain the current torque meter display value T, and calculate the gravity coefficient g0 at the current longitude and latitude; S5: Hang a weight just below the center of gravity of the previous weight in step S4, calculate the torque T1 under the current weight based on the known gravity coefficient g0 and the torque formula, record the torque value T displayed by the torque meter, and calculate the difference between T and T1; S6: Repeat step S5 until the weight of the weights is too heavy to store in the space. If the calculated difference value falls within the range of [+0.5, -0.5], the torque meter calibration is completed. S7: After the calibration is completed, the calibration balance piece is separated from the torque detection shaft and the fixing button is released.

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

7. A new energy gearbox test bench, characterized in that: include: frame; Three torque detection devices according to any one of claims 1 to 4, slidably mounted on the frame via a moving mechanism; A working platform, mounted on the frame, for placing the gearbox to be inspected; A fixed platform is provided between one of the torque detection devices and the frame, and the gearbox to be detected is fixed on the fixed platform via a transition tooling plate; The three torque detection devices are arranged in a T-shape; the three torque detection shafts are all directed toward the gearbox to be detected on the working platform.

8. The new energy transmission test bench according to claim 7, characterized in that: The working platform comprises: swivel base; 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 stepless hydraulic lock assembly, mounted on the frame, for clamping or releasing 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 workbench is disengaged from the stepless hydraulic lock assembly, 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. The new energy transmission test bench according to claim 8, characterized in that: The stepless hydraulic lock assembly includes: A locking tripod fixedly mounted on the frame; Hydraulic locking jaws, mounted on the upper end of the locking tripod; And an L-shaped locking plate fixedly mounted on the lower end surface of the workbench; the hydraulic locking clamp cooperates with the L-shaped locking plate for locking / loosening.

10. The new energy transmission test bench according to claim 7, characterized in that: The moving mechanism includes a horizontal moving mechanism installed on the frame and a slope moving mechanism installed at the output end of the horizontal moving mechanism; The slope movement mechanism comprises: A slope movable support with a slope structure; Two front slope guide rails are obliquely arranged on both sides of the front end of the slope movable bracket; Two rear slope guide rails are obliquely arranged on both sides of the rear end of the slope movable bracket; A self-locking slope push rod motor is fixedly mounted on the rear end of the slope moving bracket through a mounting bracket, and the output shaft and self-locking shaft of the self-locking slope push rod motor are both connected to the torque detection bracket; The torque detection bracket is slidably arranged with the front ramp guide rail and the rear ramp guide rail through a ramp slider; 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 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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