Speed reducer reliability test bench

Abstract

The utility model discloses a reliability test bench for a speed reducer. The reliability test bench comprises a base, a support, a cantilever, a hanging basket and an oil cylinder, the support is hinged to the base, and the oil cylinder is hinged between the base and the support so as to drive the support to pitch on the base; a first connecting structure is arranged on the support and is used for connecting a fixed end of a tested speed reducer; a second connecting structure is arranged at the first end of the cantilever and is used for being connected with the rotary output end of the tested speed reducer; and the hanging basket is hung at the second end of the cantilever. The speed reducer testing device is applied to the field of speed reducer testing, can effectively meet the requirement for simulation testing of the speed reducer under different postures and different loads when the speed reducer is used on a crank arm rock drilling trolley, and keeps low cost and safety while having high testing efficiency.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of speed reducer testing technology, and specifically relates to a speed reducer reliability test bench. BACKGROUND

[0002] The curved arm rock drilling rig is widely applied because it is more suitable for domestic construction methods. In the construction process of the rock drilling rig, the posture of the speed reducer changes at different angles between horizontal and vertical according to the positions of different construction holes, and the load borne by the speed reducer is also different in the construction process of different holes. As a key component of the curved arm rock drilling rig, the reliability of the speed reducer is particularly important in the curved arm rock drilling construction process.

[0003] Currently, the reliability test of the curved arm rock drilling machine is usually installed at the corresponding position of the main machine to perform various tests. This test method needs to test at different machines and different positions, and cannot perform tests under different postures and different loads due to the limitation of the construction terrain, making it difficult to perform full-cycle reliability tests, and the test cost is high and the efficiency is low. At the same time, the test installed on the main machine is affected by the construction environment, which will lead to poor test safety. SUMMARY

[0004] In view of the deficiencies in the prior art, the utility model provides a speed reducer reliability test bench, which can effectively meet the simulation test of the speed reducer under different postures and different loads when used on the curved arm rock drilling rig, while maintaining high test efficiency, low cost and safety.

[0005] To achieve the above purpose, the utility model provides a speed reducer reliability test bench, which comprises a base, a support, a cantilever, a hanging basket and an oil cylinder.

[0006] The support is hinged to the base, and the oil cylinder is hinged between the base and the support to drive the support to pitch on the base.

[0007] A first connecting structure is provided on the support to connect the fixed end of the tested speed reducer.

[0008] A second connecting structure is provided on the first end of the cantilever to connect the rotary output end of the tested speed reducer.

[0009] The hanging basket is hung on the second end of the cantilever.

[0010] In one embodiment, limit switches are provided on the support corresponding to the positions on both sides of the first connecting structure.

[0011] In the process of rotating the cantilever following the tested speed reducer, the limit switches are located on the rotating path of the cantilever.

[0012] In one of the embodiments, the reliability test bench for speed reducer further comprises a first control valve group, which is electrically connected with the limit switches and the tested speed reducer respectively;

[0013] The first control valve group has a first power supply end and a second power supply end. When the first power supply end is powered and the second power supply end is not powered, the tested speed reducer rotates forward. When the first power supply end is not powered and the second power supply end is powered, the tested speed reducer rotates reversely.

[0014] When one of the limit switches is triggered, the first power supply end is powered and the second power supply end is not powered.

[0015] When another limit switch is triggered, the first power supply end is not powered and the second power supply end is powered.

[0016] In one of the embodiments, the reliability test bench for speed reducer further comprises a counter to count the number of times of power supply and / or power off of the first power supply end and the second power supply end.

[0017] In one of the embodiments, the reliability test bench for speed reducer further comprises a hydraulic system, which is connected with the oil cylinder and the tested speed reducer to drive the oil cylinder to extend and retract and the tested speed reducer to rotate.

[0018] In one of the embodiments, the hydraulic system comprises an oil tank, an oil cylinder balance valve, a speed reducer balance valve, a second control valve group, a pressure sensor and the first control valve group. The oil tank has an oil inlet path and an oil return path between the oil cylinder and the tested speed reducer.

[0019] The first control valve group and the speed reducer balance valve are arranged on the oil inlet path and the oil return path between the oil tank and the tested speed reducer.

[0020] The second control valve group and the oil cylinder balance valve are arranged on the oil inlet path and the oil return path between the oil tank and the oil cylinder.

[0021] The first control valve group and the second control valve group further have a feedback oil path with the oil tank.

[0022] The pressure sensor is arranged on the feedback oil path, the high-pressure side of the tested speed reducer and / or the low-pressure side of the tested speed reducer to measure the working oil pressure of the feedback oil path, the high-pressure side pressure when the tested speed reducer operates and / or the low-pressure side pressure when the tested speed reducer operates.

[0023] In one of the embodiments, the support has a stopper corresponding to the positions on both sides of the first connecting structure.

[0024] The limit switch is located between the first connecting structure and the stopper on the same side.

[0025] In one of the embodiments, the reliability test bench for speed reducer further comprises a pitch detection mechanism for obtaining a pitch angle of the support on the base.

[0026] In one of the embodiments, the pitch detection mechanism is an inclination sensor arranged on the support; or

[0027] The pitch detection mechanism is a displacement sensor arranged on the oil cylinder.

[0028] In one of the embodiments, the reliability test bench for speed reducer further comprises a torque sensor and an angle sensor, the torque sensor and the angle sensor are arranged on the tested speed reducer to measure the torque and the rotating speed of the tested speed reducer during operation.

[0029] Compared with the prior art, the utility model has the following beneficial technical effects:

[0030] 1. The utility model discloses a support that can pitch on the base is arranged, and after the tested speed reducer is arranged on the support, the cantilever is connected, the structure layout of the tested speed reducer on the curved arm rock drilling jumbo is simulated, and the real working condition of the tested speed reducer is simulated by using the oil cylinder drive support pitch, can effectively satisfy the simulation test of different postures, different loads of speed reducer when using on the curved arm rock drilling jumbo;

[0031] 2. The utility model discloses a preferred scheme, and by arranging the limit switch on the support, the automatic reversing of the tested speed reducer is realized by cooperating with the first control valve group, so that the tested speed reducer automatically acts when reliability test, satisfies the automatic test demand of the whole life cycle of speed reducer, wherein further preferably, the reversing number of the tested speed reducer can be automatically counted by the counter;

[0032] 3. The utility model discloses a preferred scheme, and by arranging the pressure sensor in the hydraulic system, the working oil pressure, the high pressure side pressure and / or the low pressure side pressure of the tested speed reducer during operation are measured by the pressure sensor, the reliability test of the tested speed reducer is monitored, so as to stop the test and / or notify the staff when the measured pressure is abnormal, improve the safety during automatic test. BRIEF DESCRIPTION OF DRAWINGS

[0033] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will be briefly introduced the drawings needed to be used in the embodiment or prior art description, obviously, the drawings in the following description only some embodiments of the utility model, for ordinary skilled person in the art, under the premise of not paying creative labor, still can obtain other drawings according to the structure shown in these drawings.

[0034] Figure 1The utility model discloses a front view of the reliability test platform of the speed reducer.

[0035] Figure 2 The utility model discloses a partial view of the reliability test platform of the speed reducer.

[0036] Figure 3 The utility model discloses a bearing calculation example view of the reliability test platform of the speed reducer.

[0037] Figure 4 The utility model discloses a schematic view of the oil tank end in the hydraulic system.

[0038] Figure 5 The utility model discloses a schematic view of the control execution end in the hydraulic system.

[0039] The utility model discloses a bearing calculation example view of the reliability test platform of the speed reducer.

[0040] The utility model discloses a bearing calculation example view of the reliability test platform of the speed reducer. Specific implementation

[0041] The utility model discloses a bearing calculation example view of the reliability test platform of the speed reducer.

[0042] Need to explain, all directionality instruction (such as up, down, left, right, front, back in the utility model embodiment of the present application) only for explaining the relative position relation, movement condition etc. between each component in a certain specific attitude (such as the shown in the drawing), if the specific attitude changes, then the directionality instruction also changes accordingly.

[0043] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description and cannot be understood as indicating or implying the relative importance or implying the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0044] In the present application, unless otherwise specifically defined and limited, the terms "connection", "fixing" and the like should be broadly understood, for example, "fixing" can be fixed connection, or detachable connection, or integrated; can be mechanical connection, or electrical connection, or physical connection or wireless communication connection; can be directly connected, or indirectly connected through intermediate medium, can be the internal communication of two elements or the interaction relationship of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0045] In addition, the technical solutions of each embodiment of the present application can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor within the protection scope required by the present application.

[0046] As shown in Figure 1 , Figure 2 The present application discloses a kind of reliability test bench of speed reducer, it mainly includes pedestal 1, support 2, cantilever 3, hanging basket 4 and oil cylinder 5. Support 2 is hinged in the top of pedestal 1 one side, oil cylinder 5 is located below support 2 and is hinged between pedestal 1 and support 2, so that oil cylinder 5 telescopic can drive support 2 to carry out pitching action on pedestal 1. First connecting structure is arranged on support 2, for example, multiple groups of bolt holes etc., to be used for connecting the fixed end of test speed reducer 6;The first end of cantilever 3 is equipped with second connecting structure, for example, coupling etc., to be used for connecting the rotary output end of test speed reducer 6, hanging basket 4 is hung in the second end of cantilever 3. That is, support 2, test speed reducer 6, cantilever 3 and hanging basket 4 are sequentially connected, test speed reducer 6 pitches along with support 2, while test speed reducer 6 can drive cantilever 3 to swing left and right.

[0047] In the present application, hanging basket 4 can adjust the load size of test speed reducer 6 by different counterweight blocks, to meet the different working condition requirements of test speed reducer 6 when used in different rock drilling machines. For example, it is known that the length of the suspension point of cantilever 3 from the rotation center of test speed reducer 6 is 2m, the self weight of cantilever 3 is 200kg, the gravity center distance from the rotation center of test speed reducer 6 is 1m, the self weight of hanging basket 4 is 100kg, and the gravity acceleration g=10. In the case ofFigure 2 Under the posture shown, the working condition of the simulated curved arm drill jumbo is simulated, the weight of the hoisted load is calculated when the test reducer 6 bears the maximum load of 14 kN.m, the maximum torque generated by the hoisted load, the weight of the hoist basket 4 and the load of the cantilever 3 is 14 kN.m, and the calculated weight to be carried is 500 kg, so that 500 kg of counterweight is placed in the drop to simulate the actual working condition of the curved arm drill jumbo.

[0048] Therefore, the embodiment can effectively meet the simulation test of the reducer under different postures and different loads when used on the curved arm drill jumbo by arranging the pitchable support 2 on the base 1, arranging the test reducer 6 on the support 2 and connecting the cantilever 3, simulating the structural layout of the test reducer 6 on the curved arm drill jumbo, and driving the support 2 to pitch by the oil cylinder 5 to simulate the real working condition of the test reducer 6, while the overall structure is relatively simple and the cost is relatively low.

[0049] Reference Figure 2 The limit switches 7 are arranged on the support 2 corresponding to the positions on both sides of the first connecting structure, in the process of the cantilever 3 rotating with the test reducer 6, the limit switches 7 are located on the rotating path of the cantilever 3, when the cantilever 3 rotates to one side of the support 2 and triggers the limit switch 7 on that side, the upper computer can control the test reducer 6 to rotate reversely until the other limit switch 7 is triggered, and thus reciprocating to meet the automatic test requirements of the test reducer 6 throughout its life cycle. The upper computer can be selected as a PLC controller.

[0050] In the specific implementation process, the reducer reliability test bench further includes a first control valve group 8, which is electrically connected to the two limit switches 7 and the test reducer 6 through the upper computer. The first control valve group 8 has a first power supply end and a second power supply end, when the first power supply end is powered and the second power supply end is not powered, the test reducer 6 rotates forward, when the first power supply end is not powered and the second power supply end is powered, the test reducer 6 reverses; at the same time, when one of the two limit switches 7 is triggered, the first power supply end is powered and the second power supply end is not powered, when the other limit switch 7 is triggered, the first power supply end is not powered and the second power supply end is powered, which can meet the automatic test requirements of the test reducer throughout its life cycle. The first control valve group 8 can adopt a proportional reversing valve or other solenoid valve.

[0051] As a preferred embodiment, the reducer reliability test bench further comprises a counter to count the power-on and / or power-off times of the first power-on end and the second power-on end. The counter can be a manual counter or an automatic counter. When the counter is an automatic counter, the counter is electrically connected to the first control valve group 8 through the upper computer. Assuming that the tested reducer 6 starts to rotate from left to right, the first power-on end is powered on, the tested reducer 6 starts to rotate from left to right, and when the tested reducer 6 runs to the right, i.e., the right limit switch 7 senses, the right limit switch 7 feeds back a position signal to the upper computer, and the upper computer sends a command to the first control valve group 8 to make the first power-on end lose power and the second power-on end get power. At the same time, the counter adds 1 to the number of actions of the tested reducer 6, and then the tested reducer 6 reverses, i.e., rotates from right to left. Similarly, when the tested reducer 6 runs to the left limit switch 7, the left limit switch 7 feeds back a position signal to the upper computer, the upper computer sends a command to the first control valve group 8 to make the second power-on end lose power and the first power-on end get power. At the same time, the counter adds 1 to the total number of actions of the tested reducer 6, and then the tested reducer 6 reverses, i.e., rotates from left to right. Such a cycle realizes automatic action, automatic reversing, and automatic counting of the number of actions of the tested reducer 6. The automatic counter can adopt a conventional form available on the market, and its implementation and operation principle are conventional technical means, which will not be described herein.

[0052] It is worth noting that in specific applications, the number of actions of the tested reducer 6 is not limited to being counted by powering on the first power-on end and the second power-on end. It can also be realized by presetting the power-on and power-off time of the first power-on end and the second power-on end. For example, a cycle of 3 seconds of power-on and 2 seconds of power-off is set in the upper computer, the total number of test actions of the tested reducer 6 is added by 1 after one cycle, and the specific implementation principle is as follows: assuming that the tested reducer 6 starts to rotate from left to right, the upper computer outputs a current signal to control the first control valve group 8 to power on the first power-on end for 3 seconds, the tested reducer 6 starts to rotate from left to right, and stops after 3 seconds. The tested reducer 6 stops for 2 seconds, the total number of test actions of the tested reducer 6 is added by 1 after one cycle, and then automatically enters the next cycle, i.e., 3 seconds of power-on and 2 seconds of power-off. When the tested reducer 6 runs to the right, i.e., the right limit switch 7 senses, the right limit switch 7 feeds back a position signal to the upper computer, and the upper computer sends a command to the first control valve group 8 to make the first power-on end lose power and the second power-on end get power. Then the tested reducer 6 reverses, i.e., rotates from right to left. The upper computer outputs a signal to control the first control valve group 8 to power on the second power-on end for 3 seconds, the tested reducer 6 starts to rotate from right to left, and stops after 3 seconds. The tested reducer 6 stops for 2 seconds, and the total number of test actions is added by 1 after one cycle. Such a cycle realizes automatic action, automatic reversing, and automatic counting of the number of actions of the tested reducer 6.

[0053] The reliability test bench of the reducer in the embodiment further comprises a hydraulic system connected with the oil cylinder 5 and the tested reducer 6 respectively to drive the oil cylinder 5 to extend and retract and the tested reducer 6 to rotate. Specifically, the hydraulic system comprises an oil tank 9, an oil cylinder balance valve 10, a reducer balance valve 11, a second control valve group 12, a pressure sensor and the first control valve group 8. The oil tank 9 has an oil inlet path and an oil return path between the oil tank 9 and the oil cylinder 5 and the tested reducer 6. The first control valve group 8 and the reducer balance valve 11 are arranged on the oil inlet path and the oil return path between the oil tank 9 and the tested reducer 6. The second control valve group 12 and the oil cylinder balance valve 10 are arranged on the oil inlet path and the oil return path between the oil tank 9 and the oil cylinder 5. The first control valve group 8 and the second control valve group 12 further have a feedback oil path between the first control valve group 8 and the second control valve group 12 and the oil tank 9. The pressure sensor is arranged on the feedback oil path, the high-pressure side of the tested reducer 6 and / or the low-pressure side of the tested reducer 6 to measure the working oil pressure of the feedback oil path, the high-pressure side pressure when the tested reducer 6 operates and / or the low-pressure side pressure when the tested reducer 6 operates. The second control valve group 12 can adopt the same proportional reversing valve as the first control valve group 8, which is mainly used to control the extension and retraction of the oil cylinder 5.

[0054] The hydraulic system in the embodiment is specifically shown in Figure 4 、 Figure 5 , wherein L02 represents the oil inlet path, L03 represents the feedback oil path and L04 represents the oil return path.

[0055] Figure 4 Specifically, the oil tank 9 is used to store hydraulic oil. The oil suction filter 13 is threadedly connected to the oil suction steel pipe. The filtered impurities are sucked out. The oil discharge ball valve 14 is threadedly connected to the oil tank 9. The oil tank 9 can be emptied through the oil discharge ball valve 14 when the oil needs to be replaced. The oil leakage filter 15 is threadedly connected to the oil tank 9. The oil leaked from the oil pump housing flows back to the oil tank 9 through the oil leakage filter to filter impurities. The variable pump 16 outputs oil to the first control valve group 8 and the second control valve group 12 and can change the discharge capacity by changing the swash plate angle of the variable pump 16, thereby changing the flow rate. The change of the flow rate changes the pressure at the pump outlet. The pressure at the pump outlet is maintained to be greater than the feedback pressure at the feedback port. The relief valve 17 is stacked at the pump outlet. The relief pressure is adjustable. The set pressure ensures that the system will not be damaged due to excessive pressure. The M1 port of the relief valve 17 is connected to a pressure gauge to observe the system pressure. The outlet filter 18 is connected to the relief valve block through a rubber tube to filter impurities and prevent the lower valve block and components from being stuck due to pollution. The oil return filter 19 is threadedly connected to the oil tank 9. The hydraulic actuator returns to the oil tank 9 through the oil return filter 19 after filtering. The temperature sensor 20 is inserted into the oil tank 9 to detect the temperature of the hydraulic oil. The liquid level switch 21 sends an alarm when the hydraulic oil is lower than the set liquid level.

[0056] Figure 5In the embodiment, the first control valve group 8 and the second control valve group 12 are respectively connected with the power element of the upper level and the execution element of the lower level through the rubber tube, and the flow rate controlled by the program input current to the execution element can be controlled, so that the speed of the test reducer 6 and the extension and retraction amount of the oil cylinder 5 are controlled to meet the action frequency required by the test, such as controlling the test reducer to perform 5000 back-and-forth actions in one day, controlling the oil cylinder 5 to extend by 30 cm, etc. The feedback oil circuit is used to feedback the working oil pressure to the pump to stabilize the pressure difference before and after the valve and stabilize the working flow rate; the oil cylinder balance valve 10 plays a role of load maintenance of the oil cylinder 5, preventing the misoperation caused by external disturbance, etc., and improving the operation stability; and the reducer balance valve 11 plays a role of load maintenance of the reducer, preventing the misoperation caused by external disturbance, etc., and improving the operation stability.

[0057] In the embodiment, the pressure sensors in the hydraulic system mainly include three, i.e. Figure 5 Pa, Pb and Ps in the formula, wherein the pressure sensor Ps is used for monitoring the feedback working oil pressure, the pressure sensors Pa and Pb are respectively used for monitoring the high-pressure side and the low-pressure side when the test reducer 6 operates, and the difference value is the pressure difference value when the test reducer 6 operates. Together with the flow meter Q1 for detecting the flow rate, the power P1 of the test reducer 6 can be obtained by feeding back to the upper computer. In addition, the oil flow rate of the flow meter detection circuit can be obtained by the values of the two flow meters Q1 and Q2, so that the volumetric efficiency of the test reducer 6 can be obtained, such as when the test reducer 6 rotates in the positive direction (the oil enters through A and the oil exits through B), the volumetric efficiency of the test reducer 6 is (Q1-Q2) / Q1. Further preferably, the reducer reliability test bench further comprises an angle sensor and a torque sensor. The angle sensor and the torque sensor are both arranged on the test reducer 6, and are used to respectively measure the output rotation speed and the torque of the test reducer 6. Based on the output rotation speed and the torque of the test reducer 6, the power P2 output to the execution end can be calculated, and the efficiency P2 / P1 of the test reducer 6 can be obtained by cooperating with the power P1 obtained by the flow meters Q1 and Q2.

[0058] In the specific implementation process, the reducer reliability test bench further comprises a pitch detection mechanism, which can be an inclination sensor arranged on the support 2 or a displacement sensor arranged on the oil cylinder 5, etc., to obtain the pitch angle of the support 2 on the base 1, so as to obtain the pitch angle of the test reducer 6. The pitch angle cooperates with the length of the cantilever 3 and the size of the hanging weight, so that the axial torque and the radial torque of the test reducer 6 in this angle posture can be calculated.

[0059] In the embodiment, the stoppers are arranged on the support 2 at positions corresponding to the two sides of the first connecting structure, and the limit switch 7 is located between the first connecting structure and the stopper on the same side. When the test reduction gear 6 automatically operates for a long time, the limit switch 7 may be damaged, and when the limit switch 7 fails, the test reduction gear 6 rotates and is limited by the limit stopper to further rotate in one direction in the rotating process, and the two stoppers are pressed to cause the working pressure of the first control valve group 8 to rise, so a threshold value can be set, when the working oil pressure monitored by the pressure sensor Ps exceeds the threshold value, the upper computer sends a command to make the first power supply end and the second power supply end lose power at the same time, to prevent the test reduction gear 6 from further operating, and the buzzer, indicator light and the like can also send an alarm to the worker, thereby improving the safety during automatic testing.

[0060] The above only describes the preferred embodiments of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation, direct / indirect application in other related technical fields under the utility model concept of the utility model, and the contents of the utility model specification and drawings are included in the patent protection range of the utility model.

Claims

1. A speed reducer reliability test bench, characterized in that, Includes base, support, cantilever, basket and hydraulic cylinder; The support is hinged to the base, and the hydraulic cylinder is hinged between the base and the support to drive the support to pitch on the base; The support is provided with a first connecting structure for connecting the fixed end of the test reducer; The first end of the cantilever is provided with a second connecting structure for connecting the rotary output end of the test reducer; The basket is suspended at the second end of the cantilever.

2. The speed reducer reliability test bench according to claim 1, characterized in that, Limit switches are provided on the support at positions corresponding to both sides of the first connecting structure; During the rotation of the cantilever following the test reducer, the limit switch is located on the rotation path of the cantilever.

3. The speed reducer reliability test bench according to claim 2, characterized in that, It also includes a first control valve group, which is electrically connected to the limit switch and the test reducer respectively; The first control valve group has a first energized terminal and a second energized terminal. When the first energized terminal is energized and the second energized terminal is de-energized, the test reducer rotates in the forward direction. When the first energized terminal is de-energized and the second energized terminal is energized, the test reducer rotates in the reverse direction. When one of the limit switches is triggered, the first energized terminal is energized and the second energized terminal is de-energized. When another limit switch is triggered, the first energized terminal is de-energized and the second energized terminal is energized.

4. The speed reducer reliability test bench according to claim 3, characterized in that, It also includes a counter to count the number of times the first power-on terminal and the second power-on terminal are powered on and / or de-powered.

5. The speed reducer reliability test bench according to claim 3 or 4, characterized in that, It also includes a hydraulic system, which is connected to the oil cylinder and the test reducer respectively, to drive the oil cylinder to extend and retract and the test reducer to rotate.

6. The speed reducer reliability test bench according to claim 5, characterized in that, The hydraulic system includes an oil tank, a cylinder balance valve, a reducer balance valve, a second control valve group, a pressure sensor, and the first control valve group. The oil tank has an oil inlet and an oil return line between itself, the cylinder, and the reducer under test. The first control valve group and the reducer balance valve are located on the oil inlet and oil return lines between the oil tank and the reducer under test. The second control valve group and the cylinder balance valve are located on the oil inlet and return lines between the oil tank and the cylinder; The first control valve group, the second control valve group, and the oil tank are also connected by a feedback oil circuit; The pressure sensor is installed on the feedback oil line, on the high-pressure side of the test reducer and / or on the low-pressure side of the test reducer, to measure the working oil pressure of the feedback oil line, the high-pressure side pressure of the test reducer during operation and / or the low-pressure side pressure of the test reducer during operation.

7. The speed reducer reliability test bench according to any one of claims 2 to 4, characterized in that, The support is provided with stops at positions corresponding to both sides of the first connecting structure; The limit switch is located between the first connecting structure and the stop block on the same side.

8. The speed reducer reliability test bench according to any one of claims 1 to 4, characterized in that, It also includes a pitch detection mechanism for obtaining the pitch angle of the support on the base.

9. The speed reducer reliability test bench according to claim 8, characterized in that, The pitch detection mechanism is a tilt sensor mounted on the support; or The pitch detection mechanism is a displacement sensor installed on the hydraulic cylinder.

10. The speed reducer reliability test bench according to any one of claims 1 to 4, characterized in that, It also includes a torque sensor and an angle sensor, which are installed on the test reducer to measure the torque and speed of the test reducer during operation.

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