High-speed wet clutch no-load power loss testing device

Abstract

The invention discloses a no-load power loss testing device for a high-speed wet clutch. The testing device comprises a frame platform, an inner hub driving motor, an outer hub driving motor and a clutch test head are arranged on the upper side of the frame platform; a lubrication pump station is arranged on the lower side of the platform surface of the frame platform; the clutch test head comprises an inner hub shaft and an outer hub shaft coaxially nested on the outer side of the inner hub shaft; a tested clutch is mounted in the clutch test head; the inner hub driving motor is in transmission connection with an inner hub of the tested clutch through an inner hub shaft and is used for driving the inner hub to rotate; the outer hub driving motor is in transmission connection with the outer hub shaft, and the outer hub shaft is fixedly connected with an outer hub of the tested clutch; the outer hub driving motor is used for driving the outer hub to rotate; and the lubrication pump station is communicated with the clutch test head and is used for lubricating the tested clutch. The testing device can control different rotation states of the inner hub and the outer hub of the high-speed clutch.

Description

Technical Field

[0001] The invention belongs to the technical field of transmission testing, and particularly relates to a test device for the no-load power loss of a high-speed wet clutch. Background Art

[0002] A wet clutch is a device widely used in the transmissions of heavy-duty vehicles to transmit and cut off torque. To increase the transmitted torque, it is usually composed of multiple plates. With the increase in the engine speed of heavy-duty vehicles and the power density of transmissions, the speed difference between the friction plates and the separating steel plates of the no-load wet clutch increases, resulting in a larger drag torque and power loss, which affects the efficiency of the transmission system; long-term operation under high-speed conditions is likely to cause an increase in the temperature rise of the lubricating oil, and the lubricating oil carbonizes and deteriorates. Tests have proved that there is a free gap between the friction plates and the separating plates of the high-speed no-load clutch. As the speed difference further increases, the friction plates and the separating plates will vibrate violently, causing mutual collision and friction, resulting in a sharp increase in the drag torque and power loss, seriously affecting the transmission efficiency and the service life of the lubricating oil, and even causing vibration and noise inside the transmission.

[0003] For the design of a high-speed wet clutch, a bench test needs to be carried out to measure its no-load power loss. Usually, for the design of a clutch no-load power loss test device, the outer hub of the clutch is braked and the inner hub rotates to conduct tests on the brake conditions. This test method has little error for the no-load power test of a low-speed clutch, but due to the large influence of the different rotation states of the inner and outer hubs of a high-speed clutch on its no-load power loss, a very large error will be generated for a high-speed clutch. Summary of the Invention

[0004] The invention provides a test device for the no-load power loss of a high-speed wet clutch. The test device can realize the control of different rotation states of the inner and outer hubs of the high-speed clutch, simulate the working conditions of a real clutch, conduct tests on the no-load power loss of different rotation states of the inner and outer hubs of the high-speed clutch, meet the requirements of the bench test of the high-speed clutch, and provide technical support for the parameter design of the clutch, the optimization of the groove shape of the friction plate, and the analysis of the lubrication state.

[0005] To achieve the above object, the invention adopts the following specific technical solutions:

[0006] A test device for the no-load power loss of a high-speed wet clutch, the test device comprising a frame platform;

[0007] An inner hub drive motor, an outer hub drive motor, and a clutch test head are arranged on the upper side of the frame platform; a lubricating oil pumping station is arranged on the lower side of the tabletop of the frame platform.

[0008] The clutch test head comprises an inner hub shaft and an outer hub shaft coaxially nested outside the inner hub shaft; the clutch test head is used to install the clutch to be tested;

[0009] The inner hub driving motor is drivingly connected to the inner hub of the tested clutch via the inner hub shaft, and is used to drive the inner hub to rotate;

[0010] The outer hub drive motor is drivingly connected to the outer hub shaft, and the outer hub shaft is fixedly connected to the outer hub of the tested clutch; the outer hub drive motor is used to drive the outer hub to rotate;

[0011] The lubrication pump station is connected to the clutch test head and is used for lubricating the tested clutch.

[0012] Furthermore, it also includes an inner hub speed torque sensor, a driven pulley, a synchronous belt, a driving pulley, an outer hub speed torque sensor, an outer hub drive motor and a base;

[0013] The base is fixedly mounted on the frame platform and is used to support the outer hub shaft;

[0014] The inner hub speed torque sensor is installed between the inner hub drive motor and the inner hub shaft;

[0015] The outer hub speed torque sensor is installed between the outer hub drive motor and the driving pulley;

[0016] The driven pulley is coaxially fixedly mounted on the outer side of the outer hub shaft;

[0017] The driving pulley is coaxially connected to the outer hub driving motor;

[0018] The synchronous belt drive is connected between the driven pulley and the driving pulley.

[0019] Furthermore, it also includes a first coupling, a second coupling, a first bearing seat, a second bearing seat, a third bearing seat, a third coupling and a fourth coupling;

[0020] The first coupling is connected between the inner hub speed torque sensor and the inner hub drive motor; the second coupling is connected between the inner hub speed torque sensor and the inner hub shaft;

[0021] The first bearing seat is supported on the frame platform and is used to install the inner hub shaft;

[0022] The second bearing seat is fixedly mounted on the top of the base and is used for mounting the outer hub shaft;

[0023] The third bearing seat is supported on the frame platform and is used for mounting the driving pulley;

[0024] The third coupling is fixedly connected between the driving pulley and the outer hub speed and torque sensor;

[0025] The fourth coupling is fixedly connected between the outer hub speed and torque sensor and the outer hub driving motor.

[0026] Furthermore, the housing of the clutch test head is fixedly installed on the second bearing block and is made of organic quartz transparent glass;

[0027] The lubricating oil pumping station is connected to the housing through an oil supply pipe and an oil return pipe, and is used to realize the circulating flow of lubricating oil between the lubricating oil pumping station and the clutch test head;

[0028] A control valve and a pressure gauge are installed between the lubricating oil pumping station and the oil supply pipe;

[0029] An oil outlet connected to the top end of the oil return pipe is arranged at the bottom end of the housing.

[0030] Furthermore, a grid, an oil groove and an oil drain angle valve are arranged in the table top of the frame platform;

[0031] The grid is arranged at the top of the oil groove and is arranged opposite to the clutch test head in the vertical direction; an oil outlet pipe is arranged at the bottom end of the oil groove, and the oil drain angle valve is installed in the oil outlet pipe.

[0032] Furthermore, the clutch test head further includes a front cover rotatably installed on the housing through a hinge.

[0033] Furthermore, a clutch retaining piece and a connecting block are fixedly installed in the housing;

[0034] The clutch retaining piece and the connecting block are arranged opposite to each other along the axial direction of the inner hub shaft, and are used for axially and radially limiting the tested clutch;

[0035] The outer hub is fixedly connected to the outer hub shaft through an outer hub connecting disc;

[0036] The inner hub shaft is fixedly connected to the second coupling through a flange at the end of the inner hub shaft.

[0037] Furthermore, an electrical box and a measurement and control signal acquisition box are arranged on the lower side of the table top of the frame platform;

[0038] The electrical box is electrically connected to the inner hub driving motor, the outer hub driving motor and the lubricating oil pumping station;

[0039] The measurement and control signal acquisition box is signal-connected to the inner hub speed and torque sensor and the outer hub speed and torque sensor.

[0040] Furthermore, the electric box is provided with a power switch, a power indicator light and a voltmeter; the power switch is electrically connected to the inner hub drive motor, the outer hub drive motor and the lubricating oil pump station.

[0041] Furthermore, the lubricating oil pump station is further provided with a heater for heating the lubricating oil and an oil level indicator for indicating the height of the lubricating oil level;

[0042] The heater is electrically connected to the power switch.

[0043] Compared with the prior art, the technical solution of the present invention has the following beneficial effects:

[0044] 1. The test device of the present invention includes an inner hub shaft and an outer hub shaft nested coaxially, an inner hub drive motor for driving the inner hub to rotate through the inner hub shaft, and an outer hub drive motor for driving the outer hub to rotate through the outer hub shaft. Since the inner hub drive motor and the outer hub drive motor can control the rotational speed and direction respectively, different rotational state controls of the inner and outer hubs of the clutch to be tested are realized, the working conditions of a real clutch can be simulated, used for no-load power loss testing of a wet clutch assembly, meet the requirements of bench tests for high-speed clutches, study the influence law of no-load power loss of high-speed wet clutches, and facilitate the proposal of improvement measures.

[0045] 2. The test device of the present invention adopts an inner hub shaft and an outer hub shaft nested coaxially, and a synchronous belt, realizes the parallel arrangement of the inner hub drive motor and the outer hub drive motor, realizes a large center distance between the inner hub drive motor and the outer hub drive motor, can arrange high-power drive motors, meets the power requirements for high-speed clutch testing, and thus realizes different rotational state controls of the inner and outer hubs of the clutch.

[0046] 3. The test device of the present invention adopts an integral frame platform, the main test components are arranged above the frame platform, the lubricating oil pump station and the electric box are arranged below the frame platform, which is beneficial for oil return, saves space and is convenient for overall hoisting. The clutch test head is arranged above the frame platform and close to the edge, which is beneficial for the installation and disassembly of the clutch to be tested; the clutch test head uses transparent glass as the shell, which is beneficial for observing the internal lubrication situation and helps to optimize the oil grooves of the friction plate. Description of the Drawings

[0047] Figure 1 is the front view of the no-load power loss test device for the high-speed wet clutch of the present invention;

[0048] Figure 2 is the top view of the no-load power loss test device for the high-speed wet clutch of the present invention;

[0049] Figure 3 isFigure 1 Cross-sectional view of the middle clutch test head.

[0050] Wherein, 1 - clutch test head, 2 - housing, 3 - hinge, 4 - front cover, 5 - oil supply joint, 6 - oil supply pipe, 7 - grid, 8 - oil sump, 9 - drain angle valve, 10 - pressure gauge, 11 - lubrication pump station, 12 - control valve, 13 - heater, 14 - pump station motor, 15 - oil level indicator, 16 - cable, 17 - electrical box, 18 - voltmeter, 19 - power indicator light, 20 - power switch, 21 - measurement and control signal acquisition box, 22 - return oil pipe, 23 - frame platform, 24 - inner hub drive motor, 25 - first coupling, 26 - inner hub speed and torque sensor, 27 - second coupling, 28 - first bearing seat, 29 - driven pulley, 30 - second bearing seat, 31 - synchronous belt, 32 - driving pulley, 33 - third bearing seat, 34 - third coupling, 35 - outer hub speed and torque sensor, 36 - fourth coupling, 37 - outer hub drive motor, 101 - inner hub shaft flange, 102 - inner hub shaft, 103 - connecting block, 104 - outer hub shaft, 105 - base, 106 - outer hub connection plate, 107 - outer hub, 108 - clutch to be tested, 109 - inner hub, 110 - clutch retaining plate. Specific embodiments

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0052] The object of the present invention is to provide a high-speed wet clutch no-load power loss test device to test the no-load power loss of different rotation states of the inner and outer hubs of the high-speed wet clutch, and provide technical support for the parameter design of the clutch, the groove type optimization of the friction plate, and the analysis of the lubrication state.

[0053] As Figure 1 , Figure 2 and Figure 3 shown in the structure, the high-speed wet clutch no-load power loss test device provided in this embodiment includes a frame platform 23; the frame platform 23 is supported on the ground and can be composed of a frame, a tabletop and legs; the frame platform 23 forms a double-layer structure on the upper and lower sides of the tabletop. Among them, the overall frame platform 23 is adopted, and the main test components are arranged above the tabletop, and the lubrication pump station 11 and the electrical box 17 are arranged below the tabletop. Such an arrangement is beneficial to save space and return oil, and can facilitate the overall hoisting and convenient movement and position replacement.

[0054] The inner hub drive motor 24, the outer hub drive motor 37 and the clutch test head 1 are arranged on the upper side of the frame platform 23; the clutch test head 1 includes an inner hub shaft 102 and an outer hub shaft 104 coaxially nested on the outer side of the inner hub shaft 102; the clutch test head 1 is used to install the tested clutch 108; the inner hub drive motor 24 is connected to the inner hub 109 of the tested clutch 108 through the inner hub shaft 102, and is used to drive the inner hub 109 to rotate; the outer hub drive motor 37 is connected to the outer hub shaft 104, and the outer hub shaft 104 is fixedly connected to the outer hub 107 of the tested clutch 108; the outer hub drive motor 37 is used to drive the outer hub 107 to rotate. The clutch test head 1 is located at one end of the frame platform 23, and the clutch test head 1 is arranged above the frame platform 23 and close to the edge, which is convenient for the installation and disassembly of the tested clutch 108.

[0055] A lubrication pump station 11 is arranged on the lower side of the table of the frame platform 23. The lubrication pump station 11 may include a lubrication oil tank, a pump station motor 14, a lubrication pump, a heater 13 and an oil level indicator 15. The lubrication oil tank is supported on the frame on the lower side of the table and is used to store lubrication oil. The lubrication pump station 11 is connected to the clutch test head 1 and is used to provide lubrication oil for lubrication to the clutch 108 to be tested, so as to achieve lubrication of the clutch 108 to be tested. The heater 13 is installed in the lubrication oil tank and is used to heat the lubrication oil to a set temperature. The oil level indicator 15 is installed in the lubrication oil tank and is used to indicate the height of the lubrication oil liquid level in the lubrication oil tank. The pump station motor 14 is fixedly installed on the top of the lubrication oil tank and is used to drive the lubrication pump installed in the lubrication oil tank to pump lubrication oil to the clutch 108 to be tested.

[0056] like Figure 1 and Figure 2 As shown, the test device further includes a first coupling 25, an inner hub speed torque sensor 26, a second coupling 27, a first bearing seat 28, a driven pulley 29, a second bearing seat 30, a synchronous belt 31, a driving pulley 32, a third bearing seat 33, a third coupling 34, an outer hub speed torque sensor 35, a fourth coupling 36, an outer hub drive motor 37 and a base 105; wherein:

[0057] The base 105 is fixedly installed on the table top of the frame platform 23 for supporting the outer hub shaft 104; the second bearing seat 30 is fixedly installed on the top of the base 105 for installing the outer hub shaft 104, so as to support the outer hub shaft 104 so that it can rotate around its own axis.

[0058] like Figure 2As shown, the inner hub drive motor 24, the first coupling 25, the inner hub speed torque sensor 26, the second coupling 27 and the inner hub shaft 102 are coaxially fixedly connected in sequence, and the torque of the inner hub drive motor 24 is transmitted to the inner hub shaft 102 through the first coupling 25, the inner hub speed torque sensor 26 and the second coupling 27 in sequence, thereby driving the inner hub shaft 102 to rotate, and the inner hub shaft 102 of the tested clutch 108 is fixedly connected to the second coupling 27 through the inner hub shaft flange 101 at the end, and finally the inner hub 109 of the tested clutch 108 is driven to rotate through the inner hub drive motor 24.

[0059] like Figure 2 As shown, the outer hub drive motor 37, the fourth coupling 36, the outer hub speed torque sensor 35, the third coupling 34 and the driving pulley 32 are coaxially fixedly connected in sequence, and the torque of the outer hub drive motor 37 is transmitted to the driving pulley 32 through the fourth coupling 36, the outer hub speed torque sensor 35 and the third coupling 34 in sequence, thereby driving the driving pulley 32 to rotate. The driven pulley 29 is coaxially fixedly installed on the outer side of the outer hub shaft 104, so that the driven pulley 29 and the outer hub shaft 104 rotate synchronously; the synchronous belt 31 is connected between the driven pulley 29 and the driving pulley 32, and the torque of the outer hub drive motor 37 is transmitted to the outer hub shaft 104, so that the outer hub drive motor 37 can drive the outer hub shaft 104 to rotate, and the outer hub 107 of the tested clutch 108 is fixedly connected to the outer hub shaft 104 through the outer hub connecting plate 106, and finally the outer hub 107 of the tested clutch 108 is driven to rotate by the outer hub drive motor 37.

[0060] like Figure 1 and Figure 3 As shown, the first bearing seat 28, the third bearing seat 33, the inner hub speed torque sensor 26 and the outer hub speed torque sensor 35 can all be fixedly supported on the table top of the frame platform 23 through a bracket; the first bearing seat 28 is used to install and support the inner hub shaft 102; the second bearing seat 30 is fixedly installed on the table top through the base 105, and is used to install and support the outer hub shaft 104, and is also used to fix the clutch test head 1; the clutch test head 1 can be fixedly installed on the second bearing seat 30 through the outer shell 2; the third bearing seat 33 is used to install and support the driving pulley 32; the inner hub shaft 102 is rotatably installed in the outer hub shaft 104.

[0061] The outer shell 2 of the clutch test head 1 is made of transparent materials such as organic quartz glass, which is conducive to observing the internal lubrication conditions through the transparent outer shell 2 and provides a basis for optimizing the groove type of the clutch friction plate.

[0062] like Figure 1As shown in the figure, the lubricating oil pump station 11 is connected to the housing 2 through the supply oil pipe 6 and the return oil pipe 22, which is used to realize the circulating flow of the lubricating oil between the lubricating oil pump station 11 and the clutch test head 1. Thus, the lubricating oil tank is communicated with the inside of the housing of the clutch test head 1 through the supply oil pipe 6 and the return oil pipe 22 to realize the circulating flow of the lubricating oil. A control valve 12 and a pressure gauge 10 are also installed at the oil outlet at the top of the lubricating oil tank of the lubricating oil pump station 11. The control valve 12 serves as the oil outlet control switch of the lubricating oil tank. The control valve 12 is communicated with one end of the supply oil pipe 6, and the other end of the supply oil pipe 6 is connected to the oil supply joint 5 installed on the housing 2. The oil outlet pressure of the lubricating oil pump station 11 can be measured through the pressure gauge 10. An oil outlet is provided at the bottom end of the housing, and the lubricating oil in the housing automatically flows back into the lubricating oil tank under the action of gravity.

[0063] As Figure 1 shown, an oil groove 8 is provided in the tabletop of the frame platform 23, a grid 7 is provided at the top of the oil groove 8, and an oil outlet pipe is provided at the bottom end of the oil groove 8. An oil drain angle valve 9 is installed in the oil outlet pipe; the grid 7 is located at the bottom end of the clutch test head 1 and is arranged opposite to the clutch test head 1 in the vertical direction. Thus, the lubricating oil leaked from the clutch test head 1 can be stored and recovered through the grid 7 and the oil groove 8, such as the oil leaked during the process of replacing the friction plate of the clutch; the oil stored in the oil groove 8 can flow back into the lubricating oil tank of the lubricating oil pump station 11 through the oil drain angle valve 9 and the oil pipe connected to the bottom end of the oil drain angle valve 9. The grid 7 arranged above the oil groove 8 facilitates the placement of disassembly and assembly tools and can also enable the oil to flow smoothly back into the oil groove 8.

[0064] As Figure 1 shown, the clutch test head 1 further includes a front cover 4 rotatably installed on the housing 2 through a hinge 3, and the front cover 4 that can be rotated and switched facilitates the installation and disassembly of the clutch 108 to be tested. As Figure 3 shown, a clutch retaining plate 110 and a connecting block 103 are fixedly installed in the housing 2 of the clutch test head 1; the clutch retaining plate 110 and the connecting block 103 are arranged opposite to each other along the axial direction of the inner hub shaft 102, which is used to axially and radially limit the clutch 108 to be tested and restrict the displacement of the clutch 108 to be tested.

[0065] As Figure 1As shown, the above-mentioned test device further includes an electrical box 17 and a measurement and control signal acquisition box 21 arranged on the lower side of the tabletop of the frame platform 23; the electrical box 17 is provided with a power switch 20, a power indicator light 19 and a voltmeter 18; the electrical box 17 can be electrically connected to the inner hub drive motor 24, the outer hub drive motor 37, the heater 13 and the pump station motor 14 of the lubricating pump station 11 through a cable 16, and the switches of the inner hub drive motor 24, the outer hub drive motor 37, the heater 13 and the lubricating pump station 11 are controlled by the power switch 20; the measurement and control signal acquisition box 21 is signal-connected to the inner hub speed and torque sensor 26 and the outer hub speed and torque sensor 35, and can also be signal-connected to the pressure gauge 10 and the voltmeter 18, so as to obtain the speed information of the inner hub 109 and the outer hub 107, and at the same time obtain the oil supply pressure of the lubricating oil and the voltage signal.

[0066] The above-mentioned test device includes a coaxially nested inner hub shaft 102 and an outer hub shaft 104, an inner hub drive motor 24 for driving the inner hub 109 to rotate through the inner hub shaft 102, and an outer hub drive motor 37 for driving the outer hub 107 to rotate through the outer hub shaft 104, realizing the control of different rotation states of the inner and outer hubs 107 of the clutch 108 to be tested, capable of simulating the working conditions of a real clutch, used for the no-load power loss test of a wet clutch assembly, meeting the requirements of the bench test of a high-speed clutch, studying the influence law of the no-load power loss of a high-speed wet clutch, and facilitating the proposal of improvement measures.

[0067] The above-mentioned test device adopts a coaxially nested inner hub shaft 102 and an outer hub shaft 104, as well as a synchronous belt 31, realizing the parallel arrangement of the inner hub drive motor 24 and the outer hub drive motor 37, achieving a large center distance between the inner hub drive motor 24 and the outer hub drive motor 37, and two high-power drive motors can be arranged to meet the power requirements of the high-speed clutch test, thereby realizing the control of different rotation states of the inner and outer hubs 107 of the clutch.

[0068] Obviously, those skilled in the art can make various changes and modifications to the embodiments of the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these changes and modifications.

Claims

1. A test device for no-load power loss of a high-speed wet clutch, characterized in that, Including frame platform; An inner hub drive motor, an outer hub drive motor and a clutch test head are arranged on the upper side of the frame platform; a lubrication pump station is arranged on the lower side of the table of the frame platform; The clutch test head comprises an inner hub shaft and an outer hub shaft coaxially nested outside the inner hub shaft; the clutch test head is used to install the clutch to be tested; The inner hub driving motor is drivingly connected to the inner hub of the tested clutch via the inner hub shaft, and is used to drive the inner hub to rotate; The outer hub drive motor is drivingly connected to the outer hub shaft, and the outer hub shaft is fixedly connected to the outer hub of the tested clutch; the outer hub drive motor is used to drive the outer hub to rotate; The lubrication pump station is connected to the clutch test head and is used for lubricating the tested clutch.

2. The test device according to claim 1, wherein It also includes an inner hub speed and torque sensor, a driven pulley, a synchronous belt, a driving pulley, an outer hub speed and torque sensor, an outer hub drive motor and a base; The base is fixedly mounted on the frame platform and is used to support the outer hub shaft; The inner hub speed torque sensor is installed between the inner hub drive motor and the inner hub shaft; The outer hub speed torque sensor is installed between the outer hub drive motor and the driving pulley; The driven pulley is coaxially fixedly mounted on the outer side of the outer hub shaft; The driving pulley is coaxially connected to the outer hub driving motor; The synchronous belt drive is connected between the driven pulley and the driving pulley.

3. The testing device according to claim 2, wherein, It also includes a first coupling, a second coupling, a first bearing seat, a second bearing seat, a third bearing seat, a third coupling and a fourth coupling; The first coupling is connected between the inner hub speed torque sensor and the inner hub drive motor; the second coupling is connected between the inner hub speed torque sensor and the inner hub shaft; The first bearing seat is supported on the frame platform and is used to install the inner hub shaft; The second bearing seat is fixedly mounted on the top of the base and is used for mounting the outer hub shaft; The third bearing seat is supported on the frame platform and is used for mounting the driving pulley; The third coupling is fixedly connected between the driving pulley and the outer hub speed and torque sensor; The fourth coupling is fixedly connected between the outer hub speed torque sensor and the outer hub drive motor.

4. The test device according to claim 3, characterized in that, The outer shell of the clutch test head is fixedly mounted on the second bearing seat and is made of organic quartz transparent glass; The lubrication pump station is connected to the housing through an oil supply pipe and an oil return pipe, so as to realize the circulation of lubrication oil between the lubrication pump station and the clutch test head; A control valve and a pressure gauge are installed between the lubrication pump station and the oil supply pipe; The bottom end of the shell is provided with an oil outlet connected with the top end of the oil return pipe.

5. The testing device according to claim 4, wherein A grid, an oil tank and an oil drain angle valve are arranged inside the tabletop of the frame platform; The grid is arranged at the top of the oil tank and is arranged opposite to the clutch test head in the vertical direction; an oil outlet pipe is arranged at the bottom end of the oil tank, and the oil drain angle valve is installed in the oil outlet pipe.

6. The test device according to claim 1, characterized in that The clutch test head also includes a front cover rotatably mounted on the housing through a hinge.

7. The test device according to claim 1, characterized in that, A clutch baffle and a connecting block are fixedly installed in the housing; The clutch disc and the connecting block are arranged oppositely along the axial direction of the inner hub shaft, and are used for axially and radially limiting the clutch to be tested; The outer hub is fixedly connected to the outer hub shaft through an outer hub connecting disc; The inner hub shaft is fixedly connected to the second coupling through a flange of the inner hub shaft at the end.

8. The test device according to any one of claims 1-7, characterized in that, It further includes an electrical box and a measurement and control signal acquisition box arranged on the lower side of the tabletop of the frame platform; The electrical box is electrically connected to the inner hub drive motor, the outer hub drive motor, and the lubricating oil pump station; The measurement and control signal acquisition box is signal-connected to the inner hub speed and torque sensor and the outer hub speed and torque sensor.

9. The test device according to claim 8, characterized in that, The electrical box is provided with a power switch, a power indicator light, and a voltmeter; the power switch is electrically connected to the inner hub drive motor, the outer hub drive motor, and the lubricating oil pump station.

10. The test device according to claim 8, characterized in that, The lubricating oil pump station is further provided with a heater for heating the lubricating oil and an oil level indicator for indicating the height of the lubricating oil level; The heater is electrically connected to the power switch.

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