A test bench for testing performance of a reducer

Abstract

This invention relates to the field of speed reducer testing technology, specifically to a speed reducer performance testing bench, including a base, a slide table and a clamping module on the top of the base, a lifting airbag at the bottom of the slide table for driving its raising and lowering, a drive unit, a loading unit, a leveling system, and a data acquisition module on the top of the slide table. The drive unit provides input speed and power, the loading unit applies a controllable load torque, the leveling system adjusts the horizontal position of the drive unit, the clamping module holds and fixes the speed reducer under test, and the data acquisition module collects the performance parameters of the speed reducer under test during the testing process. This invention improves the efficiency and accuracy of coaxiality adjustment in speed reducer testing.

Description

Technical Field

[0001] This invention relates to the field of speed reducer testing technology, and more specifically to a speed reducer performance testing bench. Background Technology

[0002] As a key component in mechanical transmission systems, the performance of the speed reducer (such as transmission efficiency, backlash error, stiffness, lifespan, and vibration noise) directly determines the overall operating accuracy and reliability of the machine. Therefore, before the speed reducer leaves the factory or during the R&D verification phase, it is essential to accurately measure its various indicators using a dedicated performance testing bench. A typical testing bench usually consists of a drive unit (such as a servo motor), the speed reducer under test, a torque / speed sensor, and a loading unit (such as a magnetic powder brake or servo loading motor), arranged along an axis of "drive—tested component—load".

[0003] During testing, the coaxiality between the output shaft of the drive unit, the input / output shaft of the reducer under test, and the input shaft of the loading unit is a core prerequisite for ensuring the accuracy and repeatability of test data. Coaxiality deviation will cause additional bending moments and radial forces in the shaft system, which will not only introduce additional frictional losses, causing the measured transmission efficiency to deviate from the true value, but also accelerate the wear of bearings and seals, and even induce torsional vibration, seriously interfering with the confidence of dynamic performance tests.

[0004] Currently, most existing test benches use mechanical adjustment structures such as "bolt tightening + adjusting shims" or "set screw + slider". When it is necessary to adjust the height and level of the reducer or drive unit under test, the operator must repeatedly loosen the anchor bolts, insert metal shims of different thicknesses at different positions, and perform iterative measurements using a dial indicator or laser alignment instrument. This process is highly dependent on manual experience, cumbersome, and time-consuming. Especially when conducting large-scale testing of reducers of various specifications, the frequent disassembly, assembly, and realignment of equipment severely reduces testing efficiency.

[0005] Given the shortcomings of existing technologies, there is an urgent need for a new type of speed reducer performance testing bench that can improve the efficiency and accuracy of coaxiality adjustment in speed reducer testing. Summary of the Invention

[0006] To address the aforementioned problems, this invention provides a speed reducer performance testing bench, which improves the adjustment efficiency and accuracy of speed reducer testing.

[0007] To achieve the above objectives, the technical solution of the present invention is as follows: a speed reducer performance testing bench, comprising a base, a slide table and a clamp fixing module disposed on the top of the base, a lifting airbag disposed at the bottom of the slide table for driving the slide table to rise and fall, a drive unit, a loading unit, a horizontal adjustment system and a data acquisition module disposed on the top of the slide table, the drive unit for providing input speed and power, the loading unit for applying controllable load torque, the horizontal adjustment system for adjusting the horizontal position of the drive unit, the clamp fixing module for clamping and fixing the speed reducer under test, and the data acquisition module for collecting the performance parameters of the speed reducer under test during the testing process.

[0008] The technical principles of the above solution are as follows:

[0009] Before testing, the reducer under test is first mounted on the slide using the clamping module. Then, the inflation of the lifting airbag is controlled. By inflating or deflating the airbag, the change in airbag volume drives the slide to rise or fall relative to the base, thereby precisely adjusting the common vertical position of the drive unit and the clamping module on the slide. The leveling system is then activated, and the horizontal position of the drive unit within the slide plane is fine-tuned manually or automatically to eliminate radial deviation of the shaft system in the horizontal plane.

[0010] Using an external dial indicator or laser alignment instrument, the coaxiality deviation is monitored in real time. The lifting airbag (changing its height) and the leveling system (changing its horizontal position) are repeatedly fine-tuned until the coaxiality between each axis meets the test accuracy requirements. After adjustment, the position of the slide is fixed by the lifting airbag maintaining pressure or by an auxiliary locking mechanism.

[0011] During formal testing, the drive unit drives the input shaft of the reducer under test at a preset speed, and the loading unit synchronously applies a set load torque. The data acquisition module collects signals in real time from the torque sensor, speed sensor, and vibration and temperature sensors installed on the transmission chain to obtain performance parameters of the reducer under test such as transmission efficiency, backlash error, stiffness, vibration and noise under different operating conditions.

[0012] When it is necessary to replace the reducer of different specifications, simply release the clamp, replace the reducer, and then quickly re-align it using the lifting airbag and leveling system. There is no need to repeatedly disassemble and reassemble the anchor bolts or replace the shims.

[0013] The above approach has the following beneficial effects:

[0014] 1. This solution achieves continuous and rapid vertical height adjustment by using a lifting airbag to drive the slide table, replacing manual shims, without the need to loosen anchor bolts or repeatedly disassemble and reassemble the equipment. Combined with the horizontal adjustment system, shaft alignment can be completed in a short time, making it particularly suitable for frequent testing of multi-specification, high-volume reducers.

[0015] 2. In this solution, the lifting airbag can achieve micron-level height increment adjustment by controlling air pressure, avoiding the problems of inconsistent thickness and large superposition errors of traditional pads. The adjustment process can be combined with sensor closed-loop control, reducing reliance on human experience and ensuring a consistent high-precision alignment state when multiple tests are performed or when different operators perform the operation.

[0016] 3. This solution, with its precise coaxiality adjustment capability, minimizes the additional bending moment and radial force caused by installation deviations, making the measured parameters such as transmission efficiency, backlash error, and torque closer to the true performance of the reducer under test. At the same time, it reduces the interference of abnormal torsional vibration on dynamic performance testing, improving the accuracy and repeatability of test data.

[0017] Furthermore, the base is also equipped with an environmental chamber for simulating different environmental conditions.

[0018] Beneficial effects: By simulating the complex environment of the real world, the environmental adaptability and reliability of the speed reducer can be verified.

[0019] Furthermore, the fixture fixing module includes a tooling bracket, on which a first flange, an auxiliary adjustment mechanism, and a clamping mechanism are provided. A second flange is coaxially provided on the first flange, and a positioning flange is coaxially provided on the second flange. The positioning flange is used to support the reducer under test, the auxiliary adjustment mechanism is used to adjust the first flange, and the clamping mechanism is used to clamp the reducer under test.

[0020] Beneficial effects: By assembling the first flange, the second flange and the positioning flange in a stepwise coaxial manner, the reference axis is accurately transferred from the slide table to the installation stop of the reducer under test through the tooling bracket. This reduces the cumulative error caused by the machining deviation of each component and the assembly gap, making the initial coaxiality of the reducer after installation significantly better than the traditional random clamping method.

[0021] Even with residual deviations, independent radial or angular fine adjustments to the first flange via the auxiliary adjustment mechanism allow for localized fine-tuning without moving the slide or adjusting the lifting airbag. This design separates coarse adjustment (performed by the slide lifting and leveling system) from fine adjustment (performed by the fixture's built-in auxiliary adjustment mechanism), making the adjustment process more efficient and precise.

[0022] Furthermore, the auxiliary adjustment mechanism includes several limiting components arranged circumferentially on the tooling bracket. Each limiting component is threaded with an adjusting bolt, and the end of the adjusting bolt away from the nut abuts against the edge of the first flange.

[0023] Beneficial effects: Since the adjusting bolts and the limiting parts are threaded together, the axial feed amount corresponding to each rotation angle is very small. By screwing multiple adjusting bolts in or out in coordination, a radial thrust of millimeters to micrometers can be applied to the edge of the first flange, achieving highly linear micro-displacement compensation and meeting the high-precision adjustment requirements of the reducer's coaxiality.

[0024] Furthermore, the drive unit includes a first drive component, which is mounted on the top of the slide table, and the output shaft of the first drive component is coaxially connected to the input shaft of the reducer under test through an input coupling.

[0025] Beneficial effects: The output shaft of the first drive component is directly connected to the input shaft of the reducer under test via a coupling, eliminating the need for additional transmission components such as intermediate gears, belts, or universal joints. The shorter the transmission chain, the less backlash, elastic deformation, friction loss, and installation errors introduced by intermediate links, thereby improving the accuracy and response speed of speed and torque transmission. This allows the measured parameters such as transmission efficiency and backlash error to more accurately reflect the performance of the reducer under test.

[0026] Furthermore, the loading unit includes a second driving component, which is symmetrically arranged on the top of the slide table with the first driving component. The output shaft of the second driving component is coaxially connected to the output shaft of the reducer under test through an output coupling.

[0027] Beneficial effects: The second driving component and the first driving component are symmetrically arranged on the slide (such as on both sides of the same center line, or in a traditional linear layout of drive-tested-load), which makes the overall force on the slide even and avoids tilting or local stress concentration caused by uneven loading. When the lifting airbag adjusts the height of the slide, the symmetrical mass distribution is conducive to the uniform bearing of the airbag, improving the stability of the lifting process and the position holding accuracy.

[0028] Furthermore, it also includes a coaxiality detection mechanism; the coaxiality detection mechanism includes a detection ring, which has several sliding grooves and several detection slots circumferentially open, with each sliding groove corresponding to a detection slot. A first slider is slidably connected in each sliding groove, and the first slider abuts against the workpiece being tested. The workpiece being tested includes the output shaft of the input coupling, the first detection surface of the reducer being tested, and the second detection surface of the reducer being tested. A connecting rod is provided at one end of each first slider, and a return spring for supporting the reset of the first slider is provided in each sliding groove. The end of the connecting rod away from the first slider extends through the inner wall of the sliding groove into the detection slot. A detection plate is slidably connected in each detection slot, and the detection plate is drivenly connected to the connecting rod. A detection unit for detecting the displacement distance of the detection plate is provided between the detection plate and the inner wall of the detection slot. The detection unit is electrically connected to a control unit, and the control unit is electrically connected to an active adjustment mechanism. The control unit is used to determine the coaxiality between the workpiece being tested and the detection ring based on the displacement distance of each detection plate, and to control the active adjustment mechanism to make adjustments. The active adjustment mechanism is used to drive each adjusting bolt to rotate.

[0029] Beneficial effects: Traditional centering relies on repeated measurements and tightening of bolts by operators, which is time-consuming and susceptible to human error. This solution automatically collects displacement signals through a detection unit, and the control unit automatically calculates the eccentricity and drives the active adjustment mechanism to tighten the adjusting bolts. It completes the entire closed loop from detection to adjustment without manual intervention, significantly improving adjustment efficiency and consistency, and is suitable for automated testing production lines.

[0030] Furthermore, the detection unit includes electrode plates symmetrically arranged on the detection plate and the inner wall of the detection tank. The electrode plates in the same detection tank form a parallel plate capacitor, which is electrically connected to the control unit.

[0031] Beneficial effects: There is no direct contact between the plates. When the detection plate slides in the detection groove, it only changes the spacing or facing area of ​​the capacitor plates, without generating frictional resistance. Compared with resistive (sliding contacts are prone to wear) or inductive (hysteresis) sensors, capacitive detection units have an unlimited service life and their accuracy does not decrease after long-term use, making them particularly suitable for testing scenarios involving frequent product changes and repeated alignment.

[0032] Furthermore, the active adjustment mechanism includes several third driving components, each corresponding to an adjustment bolt. Each third driving component is fixedly connected to a tooling bracket, and a screw cylinder is coaxially fixedly connected to the output shaft of each third driving component. A polygonal groove is provided at the end of the screw cylinder away from the third driving component, and the polygonal groove slides in conjunction with the nut of the adjustment bolt.

[0033] Beneficial effects: The control unit directly reads the capacitance change value of the detection unit, calculates the eccentricity direction and magnitude, and immediately drives the third drive component at the corresponding position to perform compensating rotation. The entire closed-loop response time can be controlled in the millisecond to second range, eliminating the need for manual intervention in intermediate steps, significantly shortening the alignment cycle, and making it particularly suitable for high-volume, continuous testing production lines.

[0034] Furthermore, a roller is rotatably connected between the first slider and the workpiece being measured. The roller rolls with the surface of the workpiece being measured. The roller and the first slider are rotatably connected via a rotating shaft. Permanent magnets are symmetrically arranged inside the rollers. A coil is wound between the roller and the first slider. When the roller rotates, the permanent magnet continuously passes through the inside of the coil.

[0035] A second slider is provided between the connecting rod and the detection plate. The second slider is slidably connected to the detection groove and fixedly connected to the connecting rod. An electromagnet is embedded in the second slider. The electromagnet and the coil correspond one-to-one and are electrically connected. A first spring is provided between the detection plate and the inner wall of the detection groove. The first spring is used to support the contact between the detection plate and the second slider. A magnetic element is provided in the end of the detection plate near the second slider.

[0036] Beneficial effects: A roller is rotatably connected to the front end of the first slider via a rotating shaft. The roller maintains rolling contact with the outer surface of the measured part (input coupling output shaft, positioning flange, or output coupling output shaft). Permanent magnets are symmetrically embedded inside the roller, and a coil is wound in the gap between the roller and the first slider. The permanent magnets and the coil constitute a miniature generator structure.

[0037] When the reducer under test rotates during the test, the roller rotates synchronously with it due to friction with the surface of the test piece. The permanent magnet inside the roller rotates accordingly, and its magnetic field lines continuously cut the coil. According to the law of electromagnetic induction, an induced electromotive force and an induced current are generated in the coil. The magnitude of the induced current is directly proportional to the rotational speed of the roller (the higher the rotational speed, the greater the rate of change of magnetic flux, and the stronger the current), and the current frequency is synchronized with the rotational speed of the roller.

[0038] The induced current is transmitted through a wire to an electromagnet embedded in the second slider. When energized, the electromagnet generates a magnetic field, which attracts or repels a magnetic component (permanent magnet or soft magnetic material) at the end of the detection plate. Simultaneously, a first spring between the detection plate and the inner wall of the detection groove provides a counter-elastic force. Under the combined action of the electromagnetic force and the spring force, the displacement of the detection plate will reach an extreme value. The greater the eccentricity between the detection ring and the workpiece, the greater the displacement of the first slider, and thus the greater the displacement of the detection plate. Furthermore, the greater the rotational speed of the roller, the greater the electromagnetic force, and the greater the displacement of the detection plate. Therefore, the displacement of the detection plate directly reflects the real-time rotational speed of the roller.

[0039] Each detection plate and the electrode plates on the inner wall of the detection tank form a parallel plate capacitor. The displacement of the detection plate changes the distance between the electrode plates, resulting in a change in the capacitance value. The control unit collects each capacitance value, and can then infer the difference in rotational speed of each roller.

[0040] When the test piece and the detection ring are completely coaxial: the contact pressure between each roller and the surface of the test piece is uniform, the rollers do not slip, and the radii of rotation of each roller center are the same. Therefore, the angular velocity and linear velocity of each roller are completely consistent, the magnitude and frequency of the induced current generated in the coil are the same, the magnetic force generated by each electromagnet is equal, the displacement of each detection plate is consistent, and the capacitance value of the parallel plate capacitor is the same.

[0041] When there is eccentricity between the test piece and the detection ring: eccentricity leads to uneven contact pressure between the rollers and the test piece surface in different directions—the rollers in the eccentric direction are pressed more tightly, while the rollers in the opposite direction may experience reduced pressure or even lose contact. This uneven pressure causes some rollers to slip locally (the actual rolling linear velocity does not match the theoretical value), and rollers that have lost contact may even stop rotating or spin idly due to inertia. Simultaneously, due to the offset of the test piece's axis, the actual contact radius between each roller and the rotation axis changes, resulting in different angular velocities for each roller even without slippage. These factors collectively lead to significant differences in the actual rotational speed of each roller: faster-rotating rollers generate larger induced currents, resulting in larger displacements of the corresponding detection plate; slower-rotating or stopped rollers have small or even zero induced currents, resulting in smaller displacements of the detection plate.

[0042] The control unit can detect minute coaxiality deviations with extremely high sensitivity by analyzing the differences in capacitance values ​​(including amplitude and frequency differences) of the multi-channel parallel plate capacitors. This mechanism can be used not only for static alignment adjustment during the initial installation of the reducer, but also for real-time monitoring of dynamic changes in coaxiality during high-speed operation of the reducer.

[0043] Traditional methods rely on displacement sensors to directly measure radial runout, while this solution uses the difference in roller speed to indirectly amplify the eccentricity effect. Even a small eccentricity can cause significant changes in roller contact pressure and rolling radius, thereby generating a measurable difference in speed.

[0044] Existing technologies mostly perform alignment adjustments under static conditions (without rotating the test piece), failing to monitor actual dynamic coaxiality changes caused by factors such as centrifugal force, thermal expansion, and oil film formation during rotation. In this solution, the roller rotates synchronously with the test piece, continuously outputting induced current throughout the testing process. The control unit can track the fluctuations of capacitance signals in each channel in real time, improving the reliability of dynamic performance test data. Attached Figure Description

[0045] Figure 1 This is a three-dimensional structural schematic diagram of the performance testing bench for the reducer of the present invention;

[0046] Figure 2 for Figure 1 Cross-sectional schematic diagram of the test bench for testing the performance of the medium speed reducer;

[0047] Figure 3 for Figure 2 Enlarged view of a portion of point M in the middle;

[0048] Figure 4 This is a three-dimensional structural diagram of the tooling support in the performance testing bench for the reducer of the present invention;

[0049] Figure 5 This is a front view schematic diagram of the tooling support in the performance testing bench for the reducer of the present invention;

[0050] Figure 6 for Figure 3 Schematic diagram of cross-section along the middle AA direction;

[0051] Figure 7 for Figure 4 A partial sectional view of the tooling support;

[0052] Figure 8 for Figure 6 Schematic diagram of cross-section along the middle BB direction;

[0053] Figure 9 for Figure 6 A schematic diagram of the installation of the first slider at point a.

[0054] The reference numerals in the accompanying drawings of this instruction manual include: 1. Base; 2. Environmental chamber; 3. First driving component; 4. Second driving component; 5. Tooling bracket; 6. Output coupling; 7. Reducer under test; 8. Input coupling; 9. Positioning flange; 10. Second flange; 11. First flange; 12. Clamping block; 13. Limiting component; 14. Adjusting bolt; 15. Detection ring; 16. First slider; 17. Support platform; 18. Support column; 1601. Roller; 1602. Permanent magnet; 1603. Return spring; 1604. Slide groove; 1605. Connecting rod; 1606. Second slider; 1607. Electrode plate; 1608. Detection groove; 1609. Detection plate; 1610. Electromagnet. Detailed Implementation

[0055] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0056] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0057] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0058] The following detailed description illustrates the specific implementation method:

[0059] Example 1:

[0060] As attached Figure 1 - Appendix Figure 3 As shown: A speed reducer performance testing bench includes a base 1, which is a cast iron base. A slide and a clamp fixing module are installed on the top of the base 1. The slide has a three-dimensional adjustable structure. Specifically, a lifting airbag for driving the slide to rise and fall is provided at the bottom of the slide. The lifting airbag is installed inside the base 1 and is connected to a pump assembly. The pump assembly includes a positive and negative pressure dual-purpose pump, pipelines, and valves, etc. The air pressure inside the lifting airbag is controlled by the positive and negative pressure dual-purpose pump to raise the slide. Preferably, the slide and the base 1 are vertically (perpendicular to the ground) slidably connected by guide columns.

[0061] The top of the slide table is equipped with a drive unit, a loading unit, a leveling system, and a data acquisition module. The drive unit is used to provide input speed and power. Specifically, the drive unit includes a first drive component 3, which is an asynchronous motor. The first drive component 3 is installed on the top of the slide table, and the output shaft of the first drive component 3 is coaxially connected to the input shaft of the reducer 7 under test through an input coupling 8.

[0062] The loading unit is used to apply a controllable load torque. Specifically, the loading unit includes a second drive unit 4, which uses an asynchronous motor as the dynamometer. The second drive unit 4 and the first drive unit 3 are symmetrically arranged on the top of the slide table. The output shaft of the second drive unit 4 is coaxially connected to the output shaft of the reducer 7 under test through an output coupling 6. The first drive unit 3 and the second drive unit 4 share a frequency converter system, adopt a common bus mode, and have power matching.

[0063] The horizontal adjustment system is used to adjust the horizontal position of the drive unit. Specifically, in this embodiment, the horizontal adjustment system is existing technology, and all adjustments are made in the forward, backward, left, and right directions using linear guide rails. Both forward, backward, left, and right adjustments utilize a linear guide rail structure.

[0064] The clamping and fixing module is used to clamp and fix the reducer 7 under test. Specifically, the clamping and fixing module includes a tooling bracket 5, on which a first flange 11, an auxiliary adjustment mechanism, and a clamping mechanism are provided. Figure 3 As shown, the first flange 11 is slidably connected to the end face of the tooling bracket 5. The second flange 10 is coaxially mounted on the first flange 11. The second flange 10 mainly serves as a transfer connection. The positioning flange 9 is coaxially mounted on the second flange 10. The positioning flange 9 is used to support the reducer 7 under test. In this embodiment, the reducer 7 under test is an automotive active stabilizer bar reducer, which is mainly composed of a reducer body and a long cylindrical shell. The positioning flange 9 is mainly composed of a flange and a cylinder. During installation, the cylinder of the positioning flange 9 extends into the long cylindrical shell of the reducer 7 under test for basic support. The auxiliary adjustment mechanism is used to adjust the first flange 11. Specifically, the auxiliary adjustment mechanism includes several limiting members 13 arranged circumferentially on the end face of the tooling bracket 5. The limiting members 13 are welded and fixed to the tooling bracket 5. Each limiting member 13 has a threaded hole. Each limiting member 13 is threadedly connected to an adjusting bolt 14 through the threaded hole. The end of the adjusting bolt 14 away from the nut abuts against the edge of the first flange 11.

[0065] The clamping mechanism is used to clamp the reducer 7 under test. Specifically, the clamping mechanism includes a support platform 17, which is welded and fixed to the bottom of the tooling bracket 5 via a support column 18. Several clamping blocks 12 are symmetrically slidably connected to the top of the support platform 17. The reducer 7 under test is clamped and fixed by retracting and tightening the clamping blocks 12.

[0066] The data acquisition module is used to collect the performance parameters of the tested reducer 7 during the testing process. Specifically, the data acquisition module includes a torque-speed sensor and an angle sensor (angle encoder). In this embodiment, two torque sensors are used to measure the real-time torque at the input and output ends of the reducer 7, respectively. The angle encoder is a grating angle encoder, with a testing accuracy of ±1”, which measures the deformation at the input and output ends of the reducer, thereby calculating the relevant technical parameters of the reducer such as transmission error, stiffness, and backlash. The device is also equipped with a measurement and control system, which controls the speed or torque loading of the first drive component 3 and the second drive component 4 through PN communication with the frequency converter system (existing technology) to achieve closed-loop control of torque and speed; it also collects the input and output torque of the reducer in real time, the changes in input and output angles in real time, and protection parameters such as bench temperature and vibration in real time.

[0067] Preferably, the base 1 is further provided with an environmental chamber 2 for simulating different environmental conditions. In this embodiment, the environmental chamber 2 mainly includes a working chamber and a temperature and humidity generator, combined with... Figure 1 As shown, the work box is installed on the top of the base 1. The work box is a split design and can be separated by hoisting.

[0068] The specific implementation process is as follows:

[0069] The operator selects a matching positioning flange 9 according to the specifications of the reducer 7 under test. In this embodiment, the reducer 7 under test is an automotive active stabilizer bar reducer, mainly composed of a reducer body and a long cylindrical shell. The positioning flange 9 consists of a flange plate and a cylindrical body. The operator coaxially fixes the flange plate of the positioning flange 9 to the second flange 10 using fixing bolts. The second flange 10 has been pre-coaxially installed on the first flange 11.

[0070] The cylindrical body of the positioning flange 9 is inserted into the long cylindrical shell of the reducer 7 under test to achieve basic support and initial positioning. Then, the clamping mechanism is operated: the support platform 17 is welded and fixed to the bottom of the tooling bracket 5 through the support column 18. Several clamping blocks 12 are symmetrically slidably connected to the top of the support platform 17. The operator pulls the clamping blocks 12 inward so that the clamping blocks 12 hug the shell of the reducer 7 under test from both sides. Then, the locking bolts of the clamping blocks 12 are tightened to firmly clamp and fix the reducer 7 under test.

[0071] The operator connects the output shaft of the first drive unit 3 coaxially to the input shaft of the reducer under test 7 via the input coupling 8. The operator also connects the output shaft of the second drive unit 4 coaxially to the output shaft of the reducer under test 7 via the output coupling 6. The first drive unit 3 and the second drive unit 4 are symmetrically arranged on the top of the slide table, forming a linear layout of "drive—test unit—load".

[0072] The operator starts the external laser alignment instrument to measure the coaxiality deviation of the drive unit (first drive component 3), the input shaft axis, the output shaft axis of the reducer under test 7, and the load unit (second drive component 4).

[0073] Based on the vertical deviation displayed by the laser alignment instrument, the operator controls the pump assembly to inflate or deflate the lifting airbag. When raising the airbag is needed, the dual-purpose positive and negative pressure pump is activated to fill it with compressed air. The inflated airbag propels the slide platform smoothly upwards relative to base 1 along the guide column. When lowering the airbag is needed, the exhaust valve is opened to release the gas, causing the airbag to contract and lower the slide platform. By adjusting the air pressure within the airbag, the overall height of the slide platform can be steplessly adjusted within a range of 120mm to 255mm until the vertical deviation is initially eliminated.

[0074] Based on the horizontal deviation displayed by the laser alignment instrument, operate the horizontal adjustment system. For forward and backward adjustment, move the drive unit and loading unit forward and backward using the linear guide structure; for left and right adjustment, adjust the drive unit and loading unit relative to the center line of base 1 using another set of linear guide structures. Through repeated adjustments, initially reduce the horizontal deviation to within the allowable range.

[0075] Once the overall deviation is reduced to within 0.5mm, the auxiliary adjustment mechanism is used for fine-tuning. The auxiliary adjustment mechanism includes several limiting parts 13 circumferentially arranged on the end face of the tooling bracket 5. Each limiting part 13 is internally threaded with an adjusting bolt 14, the end of which abuts against the edge of the first flange 11. The operator uses a wrench to sequentially rotate each adjusting bolt 14: if it is necessary to move the first flange 11 in a certain direction, the corresponding adjusting bolt 14 is screwed in to push the edge of the first flange 11, while simultaneously loosening the adjusting bolt 14 in the opposite direction to release space. By finely adjusting the extension length of each adjusting bolt 14, the radial position and angular runout of the first flange 11, its positioning flange 9, and the tested reducer 7 are gradually corrected. Real-time readings are taken using a laser alignment instrument until the coaxiality error between the axes meets the test accuracy requirements. After adjustment, the lifting airbag maintains the current air pressure to maintain the slide height, and each adjusting bolt 14 retains its position through thread self-locking.

[0076] If the test needs to be conducted under extremely high temperature and humidity conditions, the operator places the work chamber 2 above the test bench. The work chamber is a split design, allowing for easy installation by hoisting. The temperature and humidity generator is started, and the temperature (e.g., a target value within the range of -40℃ to +120℃) and relative humidity (e.g., a target value within the range of 10% RH to 95% RH) inside the work chamber are set according to the test requirements. The temperature and humidity generator supplies temperature- and humidity-controlled air into the work chamber through a circulating air duct, placing the tested reducer 7 under the set environmental conditions. The test can only begin after the temperature and humidity inside the work chamber have stabilized.

[0077] After all test tasks are completed, the operator stops all drive and loading actions through the measurement and control system. The temperature and humidity generator in environmental chamber 2 is turned off, and the work chamber door is opened to allow the interior to return to normal temperature and humidity. Compressed air is discharged from the lifting air chamber via the pump assembly, causing the slide to slowly descend to its initial low position. All couplings are disassembled, and the reducer 7 under test is removed from the fixture fixing module. The main power is turned off, and the test bench is cleaned and maintained in preparation for the next test.

[0078] Example 2

[0079] The basics are as follows: Figure 4 - Appendix Figure 9 As shown, the only difference from Embodiment 1 above is that it also includes a coaxiality detection mechanism; preferably, this embodiment has three sets of coaxiality detection mechanisms, each including a detection ring 15, and each detection ring 15 is coaxially installed (using a detachable connection method, such as bolt fixing, or a welding fixing or integrated connection method) on the flange of the positioning flange 9 and the cylinder (attached) Figure 6 (at point a, the same below) and on output coupling 6 (the housing of output coupling 6).

[0080] The detection ring 15 has several sliding grooves 1604 and several detection slots 1608 circumferentially oriented, with each sliding groove 1604 corresponding to a detection slot 1608. Preferably, for the detection ring 15 at the flange of the positioning flange 9 and the output coupling 6, the sliding grooves 1604 are located on the inner side of the detection ring 15 (as shown in the attached figure). Figure 9 As shown), for the detection ring 15 at the cylinder of the positioning flange 9, its groove 1604 is opened on the outside of the detection ring 15 (as shown in the attached figure). Figure 9 (As shown).

[0081] Each groove 1604 has a first slider 16 slidably connected within it. One end of the first slider 16 is slidably connected within the groove 1604, and the other end extends outside the groove 1604 and abuts against the surface of the workpiece under test (e.g., the outer side of the output shaft of the input coupling 8, the inner side of the long cylindrical housing of the reducer under test 7, and the outer side of the output shaft of the reducer under test 7). The workpiece under test includes the output shaft of the input coupling 8, the first detection surface of the reducer under test 7 (corresponding to the inner side of the long cylindrical housing of the reducer under test 7), and the second detection surface of the reducer under test 7 (corresponding to the outer side of the output shaft of the reducer under test 7); combined with the attached... Figure 9 As shown, a connecting rod 1605 is welded to one end of each first slider 16. A return spring 1603 for supporting the reset of the first slider 16 is provided within each groove 1604. The return spring 1603 is sleeved on the outside of the connecting rod 1605. Both ends of the return spring 1603 abut against the first slider 16 (the end face of the first slider 16 located at one end of the groove 1604) and the inner wall of the groove 1604 (the inner wall of the groove 1604 away from the first slider 16, the inner wall surface of which is parallel to the end face of the connecting rod 1605 that contacts the first slider 16). (In some other preferred embodiments, the abutment can be replaced by adhesive fixing.) Each of the slides extending from one end of the first slider 16 through the inner wall of the slide groove 1604 into the detection groove 1608, is slidably connected to a detection plate 1609 within the detection groove 1608. The detection plate 1609 is connected to the connecting rod 1605 via a transmission connection. A detection unit for detecting the displacement distance of the detection plate 1609 is provided between the detection plate 1609 and the inner wall of the detection groove 1608. The detection unit is electrically connected to a control unit, which is electrically connected to an active adjustment mechanism. The control unit is used to determine the coaxiality of the test piece and the detection ring 15 based on the displacement distance of each detection plate 1609, and to control the active adjustment mechanism to make adjustments. The active adjustment mechanism is used to drive each adjusting bolt 14 to rotate.

[0082] Specifically, the detection unit includes electrode plates 1607 symmetrically arranged on the inner walls of the detection plate 1609 and the detection groove 1608. The electrode plates 1607 in the same detection groove 1608 form a parallel plate capacitor, which is electrically connected to the control unit.

[0083] Specifically, the active adjustment mechanism includes several third drive components (not shown in the figure). Each third drive component is a stepper motor, and each third drive component corresponds one-to-one with an adjustment bolt 14. All third drive components are bolted to the end face of the tooling bracket 5 (i.e., the attached...). Figure 5 On the surface that the first flange 11 contacts, a screw cylinder is coaxially keyed and fixed on the output shaft of the third drive component. The end of the screw cylinder away from the third drive component is provided with a polygonal groove (which matches the nut outline of the adjusting bolt 14). The polygonal groove slides in conjunction with the nut of the adjusting bolt 14.

[0084] Preferably, in this embodiment, for the flange of the positioning flange 9 and the detection ring 15 of the outer shell of the output coupling 6 (the inner side of the long cylindrical outer shell of the reducer under test 7 does not move relative to the cylinder of the positioning flange 9, so the following settings are not required), the first slider 16 and the tested component (the outer side of the output shaft of the input coupling 8 and the outer side of the output shaft of the reducer under test 7, the same below) are rotatably connected with rollers 1601. The rollers 1601 roll in contact with the surface of the tested component, and the rollers 1601 and the first slider 16 All are connected by a rotating shaft. Each roller 1601 is symmetrically embedded with a number of permanent magnets 1602. Preferably, in this embodiment, a pair of permanent magnets 1602 with opposite magnetic poles are symmetrically embedded in the roller 1601. A coil is wound between the roller 1601 and the first slider 16. In this embodiment, the rotating shaft and the first slider 16 are integrated. The coil passes through the rotating shaft and the first slider 16 and surrounds the outer and inner sides of the roller 1601. When the roller 1601 rotates, the permanent magnets 1602 continuously pass through the inside of the coil.

[0085] A second slider 1606 is provided between the connecting rod 1605 and the detection plate 1609. The second slider 1606 is slidably connected to the detection groove 1608. The second slider 1606 is welded and fixed to the connecting rod 1605. An electromagnet 1610 is embedded in the second slider 1606. In this embodiment, the parameters such as the iron core and number of turns of the electromagnet 1610 are the same. The electromagnet 1610 corresponds one-to-one with the coil and is electrically connected. A first spring (not shown in the figure) is provided between the detection plate 1609 and the inner wall of the detection groove 1608. The first spring is used to support the detection plate 1609 to contact the second slider 1606. One end of the first spring is bonded and fixed to the side of the detection plate 1609 away from the second slider 1606. The other end of the first spring is bonded and fixed to the inner wall of the detection groove 1608 away from the second slider 1606. A magnetic element is provided in the end of the detection plate 1609 near the second slider 1606. The magnetic element is a permanent magnet and the magnetic pole direction is the same as the magnetic field of the electromagnet 1610. Preferably, the circuit containing the electromagnet 1610 is electrically connected to a rectifier to convert the alternating current (AC) generated by the coil into direct current (DC), making the displacement extreme value of the detection board 1609 more stable.

[0086] The specific implementation process is as follows:

[0087] The first set of detection rings 15 are coaxially mounted on the flange end face of the positioning flange 9. These detection rings 15 are used to detect the coaxiality between the output shaft of the input coupling 8 and the positioning flange 9. The sliding groove 1604 of the detection ring 15 is opened on the inner side of the detection ring 15, and the first slider 16 abuts against the outer circular surface of the output shaft of the input coupling 8 from the inner side to the outer side.

[0088] The second set of test rings 15 are coaxially mounted on the outer circumference of the cylindrical outer shell of the positioning flange 9. These test rings 15 are used to detect the coaxiality between the first test surface of the reducer 7 under test (i.e., the inner side of the long cylindrical outer shell of the reducer 7 under test) and the positioning flange 9. Since the object of the test is the inner wall of the outer shell, the sliding groove 1604 of the test ring 15 is opened on the outer side of the test ring 15, and the first slider 16 abuts against the inner wall surface of the long cylindrical outer shell of the reducer 7 under test from the outer side to the inner side.

[0089] The third set of test rings 15 are coaxially mounted on the housing of the output coupling 6. These test rings 15 are used to detect the coaxiality between the second test surface of the reducer 7 under test (i.e., the outer circular surface of the output shaft of the reducer 7 under test) and the output shaft of the output coupling 6. The slide groove 1604 of the test ring 15 is opened on the inner side of the test ring 15, and the first slider 16 abuts against the outer circular surface of the output shaft of the reducer 7 under test from the inner side to the outer side.

[0090] Each detection ring 15 is fixed to the corresponding mounting base by bolts (or prefabricated in advance). During installation, ensure that the axis of the detection ring 15 coincides with the design axis of the mounting base.

[0091] (a) Initial detection

[0092] The control unit supplies power to the detection units of each detection ring 15 and reads the initial capacitance value of each parallel plate capacitor. Before any fine-tuning is performed, there are differences in the multiple capacitance values ​​along the circumference of each detection ring 15. Based on a pre-calibrated capacitance-displacement curve, the control unit calculates the actual displacement of the detection plate 1609 within each detection slot 1608, and then calculates the eccentricity vector (including the magnitude and direction of the eccentricity) between the axis of the detection ring 15 and the axis of the measured detection surface.

[0093] The control unit compares the calculated coaxiality error with a preset threshold (e.g., 0.02 mm). If the error exceeds the threshold, an automatic adjustment process is initiated.

[0094] (ii) Active adjustment

[0095] Based on the direction and magnitude of the eccentric vector, the control unit calculates the number of the adjusting bolt 14 that needs adjustment and the required rotation angle (given the pitch of the adjusting bolt 14, the required displacement is converted into the number of rotations). Then, the control unit sends a command to the active adjustment mechanism.

[0096] The active adjustment mechanism includes several third drive components (stepper motors are used in this embodiment). Each third drive component is bolted to the end face of the tooling bracket 5 (i.e., the surface in contact with the first flange 11) and corresponds one-to-one with each adjustment bolt 14. A screw barrel is coaxially keyed to the output shaft of each third drive component. The end of the screw barrel has a polygonal groove that matches the contour of the nut of the adjustment bolt 14. The polygonal groove slides in contact with the nut of the adjustment bolt 14.

[0097] The control unit drives the corresponding third drive component to start: For the adjusting bolt 14 that needs to be screwed in (pushing the first flange 11), the corresponding stepper motor rotates at a certain angle in the set direction, driving the screw-tightening cylinder to rotate. The screw-tightening cylinder drives the adjusting bolt 14 to rotate synchronously through the polygonal groove. The adjusting bolt 14 screws in relative to the threaded hole on the limiting member 13, and the end of the bolt pushes the edge of the first flange 11 to produce a small displacement. For the adjusting bolt 14 that needs to be unscrewed (releasing space), the stepper motor rotates in the opposite direction, the adjusting bolt 14 is unscrewed, and the first flange 11 moves in the opposite direction under the thrust of the adjacent adjusting bolt 14.

[0098] During the adjustment process, the control unit reads the capacitance changes of each parallel plate capacitor in real time, forming a closed-loop feedback. When the eccentricity is detected to be gradually decreasing, the control unit appropriately reduces the stepping angle of the stepper motor for fine adjustment; if the adjustment in a certain direction is excessive and causes the eccentricity to exceed the tolerance in the opposite direction, the control unit drives the adjustment bolt 14 on the opposite side to compensate in the opposite direction.

[0099] (III) Adjustment completed

[0100] When the control unit determines that the capacitance difference of all detection rings 15 around the circumference is within the preset threshold range, it determines that the coaxiality has met the test requirements. The control unit sends a completion signal, the stepper motor stops rotating and maintains its current locked state to prevent the adjusting bolt 14 from loosening on its own. The host computer interface displays "Alignment Complete" and the final eccentricity value of each detection ring 15.

[0101] (iv) Real-time monitoring during dynamic operation

[0102] For the inspection ring 15 at the flange of positioning flange 9 and the inspection ring 15 at output coupling 6 (i.e., when the inspection object is a rotating component):

[0103] During the formal test, the reducer 7 under test was driven to rotate by the first driving component 3. At this time:

[0104] Roller 1601 rotates synchronously due to rolling contact with the surface of the workpiece being measured;

[0105] The permanent magnet 1602 inside the roller 1601 rotates with the roller 1601, and its magnetic field lines continuously cut the coil. According to the law of electromagnetic induction, an induced electromotive force and an induced current are generated in the coil.

[0106] The induced current is transmitted to the electromagnet 1610 in the second slider 1606. After the electromagnet 1610 is energized, it generates a magnetic field, which repels the magnetic component at the end of the detection plate 1609, causing the detection plate 1609 to overcome the elastic force of the first spring and move away from the second slider 1606, and the distance between the pole plates 1607 is reduced.

[0107] The higher the rotation speed of roller 1601, the greater the induced current, the stronger the magnetic force of electromagnet 1610, and the greater the displacement of detection plate 1609.

[0108] When the test piece and the detection ring 15 are well coaxial, the rotation speed of each roller 1601 is the same, the displacement of each detection plate 1609 is the same, and the capacitance value of each parallel plate capacitor is equal.

[0109] If the coaxiality drifts due to thermal expansion, vibration or other factors during operation, the rotation speed of each roller 1601 will differ, and the displacement of the corresponding detection plate 1609 will also differ. The control unit can capture the coaxiality deviation signal in real time by detecting the change in the capacitance value.

[0110] During dynamic testing, the control unit continuously monitors the capacitance signals of each channel. Once a deviation is found to exceed the preset dynamic threshold (which can be set slightly wider than the static threshold to avoid false alarms from normal vibration), it immediately determines that the deviation is out of tolerance and issues an alarm.

[0111] The aforementioned real-time monitoring process during dynamic operation can also occur before formal testing. For example, a small initial velocity can be applied to the first driving component 3 for testing. When the tested component and the detection ring 15 are well coaxial, the rotation speed of each roller 1601 is consistent, the displacement of each detection plate 1609 is the same, and the capacitance value of each parallel plate capacitor is equal. Then, the test reducer 7 is formally tested.

[0112] After all tests are completed, the control unit stops supplying power to the active adjustment mechanism, and the stepper motor enters a free state. The operator can manually or via the control unit drive the stepper motor to rotate in the reverse direction, causing the adjusting bolt 14 to return to its initial position.

[0113] Example 3

[0114] The only difference from Embodiments 1 and 2 above is that the host computer measurement and control platform also has a built-in test sequence management module. This module is used to automatically plan and execute a complete test plan according to the preset test item arrangement principles. The test items involved in the reducer performance test include: no-load test, load test, overload test, transmission efficiency test, transmission error (including backlash and tooth clearance) test, gear contact spot detection, starting torque test, torsional stiffness test, maximum allowable housing temperature test, idle and backlash test, life test, maximum allowable input speed test, noise test, etc. There are overlapping or complementary relationships between the technical indicators and test data measured by these test items, and the order of implementation of the items directly affects the accuracy and real-time performance of the measurement results.

[0115] The sorting logic built into the test sequence management module follows these principles:

[0116] "No-load test first, then heavy load test": The no-load test is used to obtain the basic performance parameters of the reducer under no-load conditions (such as no-load friction torque, basic noise, and no-load temperature rise) to avoid the irreversible impact of plastic deformation or performance degradation caused by the heavy load test on the no-load data.

[0117] "Low speed first, then high speed": Low speed testing helps to evaluate the transmission smoothness, backlash effect and starting characteristics of the reducer in the low speed range. High speed testing may lead to increased temperature rise and changes in lubrication conditions. If high speed testing is performed first, it will mask the true meshing state under low speed conditions.

[0118] "Room temperature first, then extreme temperature": Performance data at room temperature serves as the benchmark. Extreme temperature (high or low temperature) tests will change the viscosity of the lubricating oil, the characteristics of the seals, and the material clearance. Such changes are often irreversible, so they must be arranged after room temperature tests.

[0119] Heavy load and overload tests may cause performance degradation, pitting on the gear teeth, or even plastic deformation of the reducer. Such damage is irreversible, so they should be conducted after all non-destructive tests (such as no-load, low-speed, normal temperature, transmission error, stiffness, and backlash) have been completed. Overload tests are usually the last test before life testing.

[0120] During the experiment, noise tests should be conducted in parallel as much as possible. Because noise levels vary significantly under different loads, speeds, temperature ranges, lubrication conditions, and assembly precision, continuously collecting noise data from the noise sensor and linking it to labels for each operating condition in real time can provide a complete spectrum of noise changes with operating conditions, which is superior to conducting noise tests individually.

[0121] Furthermore, the test sequence management module automatically interleaves gear contact spot detection tests between different test item transitions. For example, contact spot detection is scheduled after no-load tests and before load tests; after low-speed tests and before high-speed tests; after room temperature tests and before extreme temperature tests; and at multiple intermediate nodes in life tests. This detection is used to visually assess the position, shape, and size of the gear tooth contact area of ​​the reducer, and is an important means of judging manufacturing and assembly accuracy. By comparing the changes in contact spots at different stages, the wear process, deformation trend, and load distribution uniformity can be analyzed.

[0122] Through the above optimization and streamlining, the experimental sequence management module has established the logical relationships between measurement data and clarified the influence of the preceding experiment on subsequent measurement data. For example:

[0123] The initial temperature rise rate and no-load torque obtained from the no-load test are used as the benchmark correction values ​​for calculating the transmission efficiency in the subsequent load test.

[0124] The results of transmission error tests (including backlash and tooth clearance) directly affect the threshold for dividing the elastic deformation zone in torsional stiffness tests. If overload tests are conducted first to cause plastic deformation of the tooth surface, the transmission error and tooth clearance data will be distorted. Therefore, transmission error tests must be arranged before overload tests.

[0125] The results of contact spot detection can be used to predict the location of pitting or adhesion that may occur in subsequent life tests, and provide a reference for failure analysis after life tests.

[0126] Starting torque tests are greatly affected by lubrication conditions. A baseline value can be obtained by conducting the test at room temperature. If the test is conducted after a high-temperature test, the reduced viscosity of the lubricating oil will lead to a lower starting torque, resulting in a false "pass" conclusion. Therefore, starting torque tests should be conducted at room temperature and take precedence over extreme temperature tests.

[0127] The test sequence management module integrates the above logic into the software. Users only need to select the test items to be completed, and the system will automatically generate a test sequence that conforms to the scientific order and provide real-time prompts on the data dependencies between the current test and the preceding test, ensuring the accuracy and traceability of the measurement results.

[0128] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A test bench for testing the performance of a speed reducer, comprising a base (1), wherein a slide table and a clamp fixing module are provided on the top of the base (1), characterized in that, The bottom of the slide table is equipped with a lifting airbag for driving the slide table to rise and fall. The top of the slide table is equipped with a drive unit, a loading unit, a horizontal adjustment system and a data acquisition module. The drive unit is used to provide input speed and power, the loading unit is used to apply controllable load torque, the horizontal adjustment system is used to adjust the horizontal position of the drive unit, the clamp fixing module is used to clamp and fix the reducer under test (7), and the data acquisition module is used to collect the performance parameters of the reducer under test (7) during the test process. It also includes a coaxiality detection mechanism; the coaxiality detection mechanism includes a detection ring (15), the detection ring (15) is provided with several sliding grooves (1604) and several detection slots (1608) in the circumferential direction, the sliding grooves (1604) and the detection slots (1608) correspond one-to-one, and a first slider (16) is slidably connected in each sliding groove (1604), the first slider (16) abuts against the test piece, the test piece includes the output shaft of the input coupling (8), the first detection surface of the test reducer (7) and the second detection surface of the test reducer (7); a connecting rod (1605) is provided at one end of each first slider (16), and a reset spring (1603) for supporting the reset of the first slider (16) is provided in each sliding groove (1604), the connecting rod (1605) The ends away from the first slider (16) all extend through the inner wall of the slide groove (1604) to the detection groove (1608). Detection plates (1609) are slidably connected in the detection groove (1608). The detection plates (1609) are connected to the connecting rod (1605) in a transmission manner. A detection unit for detecting the displacement distance of the detection plates (1609) is provided between the detection plates (1609) and the inner wall of the detection groove (1608). The detection unit is electrically connected to a control unit, and the control unit is electrically connected to an active adjustment mechanism. The control unit is used to determine the coaxiality of the test piece and the detection ring (15) based on the displacement distance of each detection plate (1609), and to control the active adjustment mechanism to make adjustments. The active adjustment mechanism is used to drive each adjustment bolt (14) to rotate.

2. The speed reducer performance testing bench according to claim 1, characterized in that, An environmental chamber (2) for simulating different environmental conditions is also provided on the base (1).

3. The speed reducer performance testing bench according to claim 2, characterized in that, The fixture fixing module includes a tooling bracket (5), on which a first flange (11), an auxiliary adjustment mechanism and a clamping mechanism are provided. A second flange (10) is coaxially provided on the first flange (11), and a positioning flange (9) is coaxially provided on the second flange (10). The positioning flange (9) is used to support the reducer under test (7), the auxiliary adjustment mechanism is used to adjust the first flange (11), and the clamping mechanism is used to clamp the reducer under test (7).

4. The speed reducer performance testing bench according to claim 3, characterized in that, The auxiliary adjustment mechanism includes several limiting parts (13) arranged circumferentially on the tooling bracket (5). Each limiting part (13) is threaded with an adjusting bolt (14). The end of the adjusting bolt (14) away from the nut abuts against the edge of the first flange (11).

5. The speed reducer performance testing bench according to claim 4, characterized in that, The drive unit includes a first drive component (3), which is mounted on the top of the slide table. The output shaft of the first drive component (3) is coaxially connected to the input shaft of the reducer under test (7) through an input coupling (8).

6. The test bench for testing the performance of the reducer according to claim 5, characterized in that, The loading unit includes a second drive unit (4), which is symmetrically arranged with the first drive unit (3) on the top of the slide table. The output shaft of the second drive unit (4) is coaxially connected to the output shaft of the reducer under test (7) through the output coupling (6).

7. The test bench for testing the performance of the reducer according to claim 1, characterized in that, The detection unit includes electrode plates (1607) symmetrically arranged on the inner walls of the detection plate (1609) and the detection groove (1608). The electrode plates (1607) in the same detection groove (1608) form a parallel plate capacitor, which is electrically connected to the control unit.

8. The test bench for testing the performance of a reducer according to claim 7, characterized in that, The active adjustment mechanism includes several third driving components, each corresponding to an adjustment bolt (14). The third driving components are all fixedly connected to the tooling bracket (5). Each third driving component has a screw barrel coaxially fixedly connected to its output shaft. A polygonal groove is provided at the end of the screw barrel away from the third driving component. The polygonal groove slides with the nut of the adjustment bolt (14).

9. The test bench for testing the performance of a reducer according to claim 8, characterized in that, Rollers (1601) are rotatably connected between the first slider (16) and the workpiece being measured. The rollers (1601) roll in contact with the surface of the workpiece being measured. The rollers (1601) and the first slider (16) are rotatably connected through a rotating shaft. Permanent magnets (1602) are symmetrically arranged inside the rollers (1601). A coil is wound between the rollers (1601) and the first slider (16). When the rollers (1601) rotate, the permanent magnets (1602) continuously pass through the inside of the coil. A second slider (1606) is provided between the connecting rod (1605) and the detection plate (1609). The second slider (1606) is slidably connected to the detection groove (1608) and fixedly connected to the connecting rod (1605). An electromagnet (1610) is embedded in the second slider (1606). The electromagnet (1610) corresponds to the coil and is electrically connected. A first spring is provided between the detection plate (1609) and the inner wall of the detection groove (1608). The first spring is used to support the detection plate (1609) and the second slider (1606) to contact each other. A magnetic element is provided in the end of the detection plate (1609) near the second slider (1606).

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