A reducer load testing device

Abstract

The utility model discloses a kind of reducer load testing devices, comprising: workbench;Driving mechanism and rotating table, the workbench opposite two sides are rotatably provided with rotating table by driving mechanism respectively.This application overcomes in actual engineering application, especially in vehicle, rolling mill, mining machinery and other fields, reducer output end is often connected with driving axle or working mechanism through universal coupling, additional radial force and bending moment can be produced on reducer output shaft. These additional loads are the main reason for causing reducer output bearing early damage, oil leakage even shell cracking. The conventional test method cannot reproduce this key working condition, leading to the test results and the actual service life of reducer are seriously inconsistent, cannot effectively expose potential defects of product in actual use. For a kind of reducer load testing device that can simulate and test the load torque of reducer in the use of universal coupling.

Description

Technical Field

[0001] This utility model relates to the field of speed reducer testing, specifically to a speed reducer load testing device. Background Technology

[0002] As a core transmission component, the load capacity and reliability of the speed reducer are crucial. Traditional speed reducer load testing devices typically connect the output shaft of the speed reducer under test to a torque sensor and loading device via a rigid coupling or a standard flexible coupling. This connection method aims to create an "ideal" pure torque loading environment to measure the speed reducer's basic transmission efficiency, temperature rise, and other performance parameters.

[0003] However, in practical engineering applications, especially in fields such as vehicles, rolling mills, and mining machinery, the output end of a speed reducer is often connected to the drive axle or working mechanism via a universal coupling, which generates significant additional radial forces and bending moments on the speed reducer output shaft. These additional loads are the main causes of premature damage to the speed reducer output bearings, oil seal leaks, and even housing cracks. Traditional testing methods cannot reproduce this critical operating condition, resulting in test results that are seriously inconsistent with the actual service life of the speed reducer, and failing to effectively expose potential defects in the product during actual use.

[0004] Therefore, providing a speed reducer load testing device that can simulate and test the load torque of a speed reducer when using a universal coupling is a problem that this utility model urgently needs to solve. Utility Model Content

[0005] To address the aforementioned technical problems, the purpose of this utility model is to overcome the significant additional radial force and bending moment that often occurs on the output shaft of a speed reducer when connected to the drive axle or working mechanism via a universal coupling in practical engineering applications, especially in vehicles, rolling mills, and mining machinery. These additional loads are the main causes of premature damage to the speed reducer output bearing, oil seal leakage, and even housing cracking. Traditional testing methods cannot reproduce this critical operating condition, resulting in test results that are significantly inconsistent with the actual service life of the speed reducer, failing to effectively expose potential defects in actual use. This utility model provides a speed reducer load testing device capable of simulating and testing the load torque of a speed reducer when using a universal coupling. To achieve the above objectives, this utility model provides a speed reducer load testing device, comprising: a worktable; a drive mechanism and a rotary table, wherein the worktable is rotatably mounted on opposite sides via the drive mechanism; a dynamic torque sensor, wherein the worktable is positioned between the two rotary tables; a speed reducer motor and a brake, wherein the speed reducer motor is detachably mounted on one rotary table and the brake is mounted on the other rotary table; and a universal coupling assembly, wherein the dynamic torque sensor is connected to the output ends of the speed reducer motor and the brake respectively via the universal coupling assembly at its two output ends.

[0006] Preferably, the driving mechanism includes: a transmission gear, with a transmission gear coaxially arranged on the bottom of each rotary table; a synchronizing gear and a driving assembly, wherein the synchronizing gear is rotatably arranged between the transmission gears on both sides through the driving assembly, and its opposite sides mesh with each transmission gear respectively.

[0007] Preferably, the drive assembly includes: a worm gear, on which the synchronizing gear is coaxially disposed; a worm; and a drive motor, wherein the worm is rotatably disposed within the worktable through meshing with the worm gear via the drive motor.

[0008] Preferably, the universal coupling assembly includes: a first fork-shaped joint, wherein the output shafts of the dynamic torque sensor, the output shaft of the geared motor, and the output shaft of the brake at opposite ends are detachably provided with the first fork-shaped joint; a cross coupling, wherein the outer end of each fork-shaped joint is rotatably provided with a cross coupling; and a spline telescopic sleeve assembly, wherein two adjacent cross couplings are connected by a spline telescopic sleeve assembly.

[0009] Preferably, the spline telescopic sleeve assembly includes: a second fork-shaped connector, one end of which is connected to any first fork-shaped connector via a cross joint, and the other end of which is coaxially provided with a telescopic rod, the telescopic rod having a key block along its length; and a third fork-shaped connector, one end of which is connected to a first fork-shaped connector on the opposite side of the second fork-shaped connector via a cross joint, and the other end of which is coaxially provided with a telescopic sleeve, the telescopic sleeve having a keyway adapted to the key block along its length.

[0010] Preferably, an instrument box electrically connected to the dynamic torque sensor is also provided on one side of the workbench.

[0011] Preferably, the brake is a hysteresis brake.

[0012] According to the above technical solution, the beneficial effects of this utility model compared with the prior art are as follows: This application installs the geared motor on a rotary table away from the brake on the worktable, then installs the first fork-shaped connector on the output shaft of the geared motor to establish a connection with the dynamic torque sensor, then starts the geared motor, and applies a certain load to the output shaft of the geared motor through the brake, while simultaneously starting the drive motor to drive the worm gear to rotate, thereby driving the synchronous gear to rotate through the worm wheel, and then driving each rotary table to rotate a certain angle through the transmission gear. At this time, the second fork-shaped connector and the third fork-shaped connector extend and retract through the telescopic rod and telescopic sleeve, and the additional radial force and bending moment on the output shaft of the geared motor change. By continuously adjusting the rotation angle of the rotary table, and thus continuously adjusting the additional radial force and bending moment on the output shaft, and by adjusting the load applied to the output shaft of the geared motor by the brake, the scenario in the actual working process in the fields of vehicles, rolling mills, and mining machinery is simulated, thereby obtaining its actual service life and exposing its possible potential defects.

[0013] Other features and advantages of this utility model will be described in detail in the following detailed description section; and all parts not covered in this utility model are the same as or can be implemented using existing technology. Attached Figure Description

[0014] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the following detailed description to explain the present invention, but do not constitute a limitation thereof. In the drawings: Figure 1 This is a perspective view of a speed reducer load testing device provided in a preferred embodiment of the present invention; Figure 2 This is a plan view of a speed reducer load testing device provided in a preferred embodiment of the present invention; Figure 3 This is a partial three-dimensional view of the speed reducer load testing device provided in a preferred embodiment of the present invention. Figure 1 ; Figure 4 This is a partial plan view of a speed reducer load testing device provided in a preferred embodiment of this utility model; Figure 5 This is a partial three-dimensional view of the speed reducer load testing device provided in a preferred embodiment of the present invention. Figure 2 .

[0015] Explanation of reference numerals in the attached drawings: 1. Worktable; 2. Drive mechanism; 21. Transmission gear; 22. Synchronous gear; 23. Drive assembly; 231. Worm gear; 232. Worm; 233. Drive motor; 3. Rotary table; 4. Dynamic torque sensor; 5. Gear motor; 6. Brake; 7. Universal coupling assembly; 71. First fork joint; 72. Cross coupling; 73. Spline telescopic sleeve assembly; 731. Second fork joint; 7311. Telescopic rod; 7312. Key block; 732. Third fork joint; 7321. Telescopic sleeve; 7322. Keyway. Detailed Implementation

[0016] The specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the scope of this utility model.

[0017] In the description of the embodiments of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating orientation or positional relationships, are based on the orientation or positional relationships shown in the accompanying drawings, or the orientation or positional relationships commonly used when the utility model product is in use. These are merely for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or component 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 utility model. Furthermore, the terms "first," "second," and "third," etc., are only used for distinguishing descriptions and should not be construed as indicating or implying relative importance. Additionally, the terms "horizontal," "vertical," and "suspended," etc., do not indicate that the component is required to be absolutely horizontal or suspended, but rather that it can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal than "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0018] In the description of the embodiments of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" 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 utility model according to the specific circumstances.

[0019] To further understand the features, technical means, and specific objectives and functions achieved by this utility model, the following detailed description of this utility model is provided in conjunction with the accompanying drawings and specific embodiments.

[0020] Reference Figure 1 A speed reducer load testing device includes: a workbench 1; a drive mechanism 2 and a rotary table 3, wherein the workbench 1 is rotatably mounted on opposite sides of the rotary table 3 via the drive mechanism 2; a dynamic torque sensor 4, wherein the dynamic torque sensor 4 is disposed between the rotary tables 3 on both sides of the workbench 1; a speed reducer motor 5 and a brake 6, wherein the speed reducer motor 5 is detachably mounted on one of the rotary tables 3 and the brake 6 is mounted on the other rotary table 3; and a universal coupling assembly 7, wherein the dynamic torque sensor 4 is connected to the output ends of the speed reducer motor 5 and the brake 6 respectively via the universal coupling assembly 7.

[0021] This application uses brake 6 to simulate load, and universal coupling assembly 7 and rotary table 3 to simulate the additional radial force and bending moment experienced by geared motor 5 during actual connection with universal coupling. The testing team selects torque and speed as stresses to accelerate the test time. At the same time, the reliability and testing team uses an inverse power law model to calculate the acceleration coefficient, thereby shortening the test time and testing the actual service life of geared motor 5, which can effectively expose potential defects of the product in actual use.

[0022] Reference Figure 2 The drive mechanism 2 includes: a transmission gear 21, with a transmission gear 21 coaxially arranged at the bottom of each rotary table 3; a synchronization gear 22 and a drive assembly 23, wherein the synchronization gear 22 is rotatably arranged between the transmission gears 21 on both sides through the drive assembly 23, and its opposite sides mesh with each transmission gear 21 respectively.

[0023] Since the two rotary tables 3 are driven by the same gear, they are mechanically rigidly connected and forced to synchronize. This ensures that the rotation angle of the two rotary tables 3 is always the same. This makes the output shaft of the geared motor 5 and the output shaft of the brake 6 have the same additional radial force and bending moment. Consequently, the dynamic torque sensor 4 has the same additional radial force and bending moment relative to the two output shafts, thereby improving the test accuracy.

[0024] Reference Figure 3 The drive assembly 23 includes: a worm gear 231, which is coaxially mounted on the synchronous gear 22; a worm 232; and a drive motor 233. The worm 232 is rotatably mounted on the worktable 1 through meshing with the worm gear 231 via the drive motor 233.

[0025] The large reduction ratio of the worm gear 231 and worm 232 in this application enables precise driving of the rotation angle of each rotary table 3, thereby improving testing accuracy.

[0026] Reference Figure 4 and Figure 5The universal coupling assembly 7 includes: a first fork joint 71, wherein the output shafts of the dynamic torque sensor 4, the output shaft of the geared motor 5, and the output shaft of the brake 6 at opposite ends are detachably provided with the first fork joint 71; a cross coupling 72, wherein a cross coupling 72 is rotatably provided at the outer end of each fork joint; and a spline telescopic sleeve assembly 73, wherein two adjacent cross couplings 72 are connected by the spline telescopic sleeve assembly 73.

[0027] The fork-shaped connector of this application is connected to the output shaft by a matching key and groove. Each end uses a cross-shaped coupling 72, and the middle is connected by a spline sleeve. This forms a standard "universal coupling" structure. The specific installation method is existing technology and will not be described in detail here. This ensures constant speed transmission between the output shaft of the geared motor 5 and other output shafts, so that the dynamic torque sensor 4 can obtain stable torque relative to the two output shafts respectively.

[0028] Reference Figure 5 The spline telescopic sleeve assembly 73 includes: a second fork-shaped connector 731, one end of which is connected to any first fork-shaped connector 71 via a cross-shaped coupling 72, and the other end of which is coaxially provided with a telescopic rod 7311, the telescopic rod 7311 having a key block 7312 along its length; and a third fork-shaped connector 732, one end of which is connected to a first fork-shaped connector 71 on the opposite side of the second fork-shaped connector 731 via a cross-shaped coupling 72, and the other end of which is coaxially provided with a telescopic sleeve 7321, the telescopic sleeve 7321 having a keyway 7322 adapted to the key block 7312 along its length.

[0029] In this application, power is transmitted from the first fork-shaped connector 71 at one end, through the cross coupling 72 to the second fork-shaped connector 731, and then through the key block 7312 on its telescopic rod 7311 to the keyway 7322 in the telescopic sleeve 7321 of the third fork-shaped connector 732. The power is then transmitted via the third fork-shaped connector 732, the cross coupling 72, and finally to the first fork-shaped connector 71 at the other end. The engagement of the key block 7312 and the keyway 7322 ensures effective power transmission.

[0030] A box electrically connected to the dynamic torque sensor 4 is also provided on one side of the workbench 1.

[0031] The instrument box in this application works in conjunction with the dynamic torque sensor 4 to detect and display torque, speed, and power. The specific structure and connection method are existing technologies and will not be described in detail here. The instrument box usually also integrates a communication module, such as RS485, RS232, Ethernet port, or 4G / Wi-Fi module, which enables it to upload real-time data to a host computer, PLC, or data acquisition system for further analysis, storage, or generation of test reports. The instrument box is not shown in the figure.

[0032] The brake 6 is a hysteresis brake.

[0033] The hysteresis brake of this application is a torque control component. It utilizes the principle of hysteresis to generate a stable torque output by adjusting the input current. This allows it to achieve extremely smooth and precise torque control throughout the entire range from zero speed to maximum speed. It can stably load without torque fluctuations, whether in low-speed, high-torque or high-speed, low-torque conditions. It provides very clean and accurate load data for testing. The specific structure and principle are existing technologies and will not be described in detail here.

[0034] In use, the device provided by this utility model involves installing the geared motor 5 on a rotary table 3 on the side of the workbench 1 away from the brake 6, then installing the first fork-shaped connector 71 on the output shaft of the geared motor 5 to establish a connection with the dynamic torque sensor 4. The geared motor 5 is then started, and a certain load is applied to the output shaft of the geared motor 5 through the brake 6. Simultaneously, the drive motor 233 is started to drive the worm gear 232 to rotate, which in turn drives the synchronous gear 22 to rotate through the worm wheel 231, and then drives each rotary table 3 to rotate a certain angle through the transmission gear 21. At this time, the second fork-shaped connector 731 and the third fork-shaped connector 732 extend and retract through the telescopic rod 7311 and the telescopic sleeve 7321. The additional radial force and bending moment on the output shaft of the geared motor 5 change accordingly. By continuously adjusting the rotation angle of the rotary table, the additional radial force and bending moment on the output shaft are continuously adjusted, and the load applied to the output shaft of the geared motor 5 by the brake 6 is adjusted, simulating the actual working process in vehicles, rolling mills, mining machinery, and other fields, thereby obtaining its actual service life and exposing its potential defects.

[0035] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0036] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable way without contradiction. In order to avoid unnecessary repetition, this utility model will not describe the various possible combinations separately.

[0037] Furthermore, various different embodiments of this utility model can be combined in any way, as long as they do not violate the spirit of this utility model, they should also be regarded as the content disclosed by this utility model.

Claims

1. A speed reducer load testing device, characterized in that, include: Worktable (1); drive mechanism (2) and rotary table (3), the worktable (1) is rotatably provided with rotary tables (3) on both sides of the drive mechanism (2); dynamic torque sensor (4), the worktable (1) is provided between the rotary tables (3) on both sides; geared motor (5) and brake (6), the geared motor (5) is detachably provided on any rotary table (3) and the brake (6) is provided on the other rotary table (3); universal coupling assembly (7), the dynamic torque sensor (4) is connected to the output end of the geared motor (5) and the output end of the brake (6) respectively through the universal coupling assembly (7).

2. The speed reducer load testing device according to claim 1, characterized in that, The drive mechanism (2) includes: a transmission gear (21), with a transmission gear (21) coaxially arranged at the bottom of each rotary table (3); a synchronizing gear (22) and a drive assembly (23), wherein the synchronizing gear (22) is rotatably arranged between the transmission gears (21) on both sides through the drive assembly (23), and its opposite sides mesh with each transmission gear (21) respectively.

3. The speed reducer load testing device according to claim 2, characterized in that, The drive assembly (23) includes: a worm gear (231), which is coaxially mounted on the synchronous gear (22); a worm (232); and a drive motor (233), wherein the worm (232) is rotatably mounted on the worktable (1) by meshing with the worm gear (231) through the drive motor (233).

4. The speed reducer load testing device according to claim 1, characterized in that, The universal coupling assembly (7) includes: a first fork joint (71), the output shafts of the dynamic torque sensor (4), the output shaft of the geared motor (5), and the output shaft of the brake (6) at opposite ends are detachably provided with the first fork joint (71); a cross joint (72), the outer end of each fork joint is rotatably provided with a cross joint (72); and a spline telescopic sleeve assembly (73), two adjacent cross joints (72) are connected by the spline telescopic sleeve assembly (73).

5. The speed reducer load testing device according to claim 4, characterized in that, The spline telescopic sleeve assembly (73) includes: a second fork-shaped connector (731), one end of which is connected to any first fork-shaped connector (71) via a cross-connector (72), and the other end of which is coaxially provided with a telescopic rod (7311), the telescopic rod (7311) having a key block (7312) along its length direction; and a third fork-shaped connector (732), one end of which is connected to the first fork-shaped connector (71) on the opposite side of the second fork-shaped connector (731) via a cross-connector (72), and the other end of which is coaxially provided with a telescopic sleeve (7321), the telescopic sleeve (7321) having a keyway (7322) adapted to the key block (7312) along its length direction.

6. The speed reducer load testing device according to claim 1, characterized in that, The workbench (1) is also equipped with an instrument box that is electrically connected to the dynamic torque sensor (4) on one side.

7. The speed reducer load testing device according to claim 1, characterized in that, The brake (6) is a hysteresis brake.

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