Endurance test device for gearbox reversing gear clutch

Abstract

The invention relates to the field of clutch testing, in particular to a gearbox reversing gear clutch durability test device which comprises a driving box and a clutch mounting box, an electric gear shifter used for switching gears of a clutch is arranged in the clutch mounting box, a power output shaft driven by a driving part is arranged in the driving box, and the driving box is filled with cooling liquid. A cooling pump used for cooling and circulating cooling liquid is installed at the bottom of the driving box, the driving box is communicated with the clutch installation box through a valve, a temperature sensor used for detecting the temperature of a clutch is arranged in the clutch installation box, and a controller is fixedly connected to the driving box. The controller is used for opening the valve when the temperature detected by the temperature sensor exceeds a preset value. According to the technical scheme, the cooling liquid is stored and utilized to cool the driving part in a normal state, and when the tested clutch is overheated and burnt, the cooling liquid is released, and potential safety hazards caused by overheating are restrained.

Description

Technical Field

[0001] The invention relates to the field of clutch testing, and in particular to a transmission reversing gear clutch durability testing device. Background Art

[0002] There are obvious problems in the traditional durability performance test of clutch transmission mechanism. First, the test process mainly relies on manual operation, which leads to instability in the test. Due to the differences in strength and speed between different operators, the test results are easily affected by individual differences of operators, lacking consistency and repeatability, which not only threatens the accuracy of the test data, but also increases the risk of the test, which may lead to operational errors and accidents. Second, manual operation is inefficient and consumes a lot of time and human resources. The test personnel not only need to perform tedious operations, but also need to constantly monitor the test process, which increases the complexity of the work. The clutch transmission mechanism is a key component in the automotive power transmission system, which is responsible for controlling the transmission of engine output power to the vehicle drive wheels. Therefore, the performance and reliability of the clutch transmission mechanism are crucial to the performance and safety of the vehicle. However, the traditional clutch transmission mechanism durability test usually requires manual operation, which has many problems. To solve these problems, it is necessary to design a clutch durability test detection device.

[0003] In the prior art, for example, patent publication number CN108613804A discloses a gearbox reversing clutch durability test device and test method, which automatically controls the gear position through an industrial computer, thereby performing an automated durability test. However, the performance of the clutch will be affected by temperature, and the use of motor simulation transmission will inevitably accumulate heat quickly during long-term operation, which will not only affect the experimental environment stability of the clutch, but also cause the motor overheating to reduce its service life. At the same time, in order to quickly achieve the durability test effect, it is necessary to run uninterruptedly at night. There are few people on duty at night, and it is difficult to pay attention to the clutch status at all times. Therefore, a gearbox reversing clutch durability test device with high automation and high safety is needed. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a transmission reversing gear clutch durability test device, which is used to cool the driving parts with coolant during normal storage. When the tested clutch overheats and burns, the coolant is released to suppress the safety hazards caused by overheating.

[0005] In order to achieve the above-mentioned purpose, the technical scheme of the present invention is as follows: a gearbox reversing clutch durability test device, comprising a drive box and a clutch mounting box, the clutch mounting box is provided with a mounting frame for mounting the clutch, the clutch mounting box is provided with an electric shifter for switching the clutch gear, the drive box is provided with a driving member, the driving member is provided with a power output shaft, the power output shaft extends into the clutch mounting box, the power output shaft is used to cooperate with the power input end of the clutch, and the clutch mounting box is provided with a detector for respectively detecting the rotation speed of the power output shaft and the power output end of the clutch;

[0006] The drive box is filled with coolant, and a cooling pump for cooling and circulating the coolant is installed at the bottom of the drive box. The drive box and the clutch mounting box are connected through a valve. The valve is used to fill the clutch mounting box with coolant after it is opened and the drive box still retains a liquid level height for the cooling pump to circulate. A temperature sensor for detecting the temperature of the clutch is provided in the clutch mounting box. A controller is fixedly connected to the drive box, and the controller is used to open the valve when the temperature detected by the temperature sensor exceeds a preset value.

[0007] The above scheme has the following beneficial effects:

[0008] 1. In this scheme, the mounting frame is used to provide the installation position of the clutch, and the clutch is matched with the power input end after installation. When conducting the durability test, the drive component can simulate the engine output of the car, and the electric shifter can automatically trigger the shifting action. The durability test is conducted based on the electric shifter continuously shifting and accumulating the number of clutch uses.

[0009] 2. In this scheme, the durability test needs to be run continuously to achieve the effect of quickly obtaining the durability test results. During this process, the drive parts will continue to run, thereby accumulating heat. The coolant can conduct heat and circulate cooling through the cooling pump to reduce the probability of overheating of the drive parts.

[0010] 3. In this solution, the clutch will overheat after continuous use, especially after aging, the clutch structure may become fatigued or damaged, which will cause the clutch to burn. When the clutch burns, it will produce a burning smell. During the day, it can often be handled by the staff in time, but because the endurance test is automated, it can also be performed at night. At this time, it may be difficult for the staff to handle it in time, which will evolve into a greater safety hazard. In addition, the clutch is different from the drive part. The clutch is a test part, and its operating environment should be the same as the actual application link. The additional cooling system will affect the test results.

[0011] The temperature sensor can detect the clutch temperature. When the clutch temperature is overheated, the drive parts and the electric shifter are stopped to prevent further temperature rise. At the same time, the valve opens and the coolant in the drive box flows into the clutch mounting box, so that the clutch cools down quickly and reduces the risk of combustion caused by its overheating. At the same time, the coolant level in the drive box meets the liquid level of the cooling pump circulation, so that the cooling cycle can still be triggered after the coolant is injected into the clutch mounting box, thereby achieving long-term cooling.

[0012] 4. In this solution, the drive and the clutch share a cooling system, which does not require additional expansion of the coolant storage space, and uses a cooling pump together, which can automatically reduce the risk of accidents caused by clutch fatigue overheating.

[0013] Furthermore, the electric shifter is one of an electromagnetic switch group and an electric push rod group.

[0014] Beneficial effects: The electromagnetic switch group is used to electrically cooperate with the clutch for self-controlled gear shifting, while the electric push rod group can trigger gear shifting through physical interaction.

[0015] Furthermore, the driving member includes two motors, which are respectively located on both sides of the power output shaft, and the motor and the power output shaft are both driven by gears.

[0016] Beneficial effect: The two motors can be used alternately, thereby reducing the shortened life or performance degradation caused by fatigue overheating of a single motor.

[0017] Furthermore, the controller is used to control the motor to operate alternately to provide driving force for the power output shaft.

[0018] Beneficial effect: The controller stabilizes the output effect and heat of the motor by alternately controlling the start and stop of the motor.

[0019] Furthermore, an air inlet is provided on a side wall of the clutch mounting box, and the air inlet is located on a side of the clutch mounting box away from the cooling pump.

[0020] Beneficial effect: The clutch is also cooled by air under normal conditions, and the air inlet can provide gas for cooling the clutch. Since the cooling pump may cause the outside air to become hot, the air inlet is located on the side of the clutch mounting box away from the cooling pump.

[0021] Furthermore, a one-way valve is provided in the air inlet, and the one-way valve is used to control the air intake amount and air intake time in the clutch mounting box.

[0022] Beneficial effect: The air intake of the clutch mounting box can be controlled by the one-way valve, so that the clutch mounting box can simulate the air intake environment of the car.

[0023] Furthermore, an air outlet is arranged on the top of the clutch installation box, and a waterproof and breathable membrane is arranged inside the air outlet.

[0024] Beneficial effects: the air outlet can provide exhaust, and the hot air flow generated when the clutch is cooled will be discharged from the air outlet. The waterproof and breathable membrane can prevent the coolant from overflowing from the air outlet when the coolant is injected.

[0025] Furthermore, the cooling pump comprises a pump body, the pump body is provided with a liquid inlet pipe and a liquid outlet pipe connected with the drive box, and semiconductor refrigerators are provided on the liquid inlet pipe and the liquid outlet pipe.

[0026] Beneficial effect: The liquid inlet pipe and the liquid outlet pipe can pump out the coolant, and cool the coolant through the semiconductor refrigerator, so as to control the overall temperature of the coolant.

[0027] Furthermore, a load shaft is provided in the clutch mounting box, the load shaft is detachably connected to the power output end of the clutch, the load shaft extends outside the clutch mounting box, and one end of the load shaft outside the clutch mounting box is fixedly connected to a load mounting block.

[0028] Beneficial effect: The load shaft can simulate the load in the operation of the car, and the weight block used to simulate the load is assembled through the load mounting block to simulate the use in the operation of the car.

[0029] Furthermore, a display is provided on the top of the clutch mounting box, and the display is used to display the clutch shifting times based on the electric shifter starting times.

[0030] Beneficial effect: The display can show the clutch shift times, making it convenient for users to understand the real-time test experimental conditions.

[0031] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is an axonometric schematic diagram of an embodiment of a gearbox reversing gear clutch durability test device of the present invention;

[0033] Figure 2 A schematic diagram of an air inlet of an embodiment of a transmission shifting gear clutch durability test device of the present invention;

[0034] Figure 3 It is a schematic isometric cross-sectional view of an embodiment of a transmission shifting gear clutch durability test device of the present invention;

[0035] Figure 4 It is a cross-sectional schematic diagram of an embodiment of a transmission reversing gear clutch durability test device of the present invention.

[0036] The figure marks in the drawings of the specification include: 1. drive box; 2. clutch mounting box; 3. mounting frame; 4. electric shifter; 5. motor; 6. power output shaft; 7. detector; 8. cooling pump; 9. valve; 10. temperature sensor; 11. air inlet; 12. air outlet; 13. load shaft; 14. load mounting block; 15. display. DETAILED DESCRIPTION

[0037] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] The following is further described in detail through specific implementation methods:

[0041] As attached Figure 1-Figure 4As shown: a gearbox reversing clutch durability test device, including a drive box 1 and a clutch installation box 2, the clutch installation box 2 is provided with a mounting frame 3 for installing the clutch, the clutch installation box 2 is provided with an electric shifter 4 for switching the clutch gear, the electric shifter 4 is one of an electromagnetic switch group and an electric push rod group, wherein the electric push rod group is used to drive the clutch gear lever to shift gears. A driving member is provided in the drive box 1, and the driving member is provided with a power output shaft 6, and the driving member includes two motors 5, the motors 5 are respectively located on both sides of the power output shaft 6, the motors 5 are waterproofed, the motors 5 and the power output shaft 6 are both driven by gears, the power output shaft 6 extends into the clutch installation box 2, the power output shaft 6 is used to cooperate with the power input end of the clutch, and the clutch installation box 2 is provided with a detector 7 for respectively detecting the speed of the power output shaft 6 and the power output end of the clutch.

[0042] The drive box 1 is filled with coolant, and a cooling pump 8 for cooling and circulating the coolant is installed at the bottom of the drive box 1. The drive box 1 and the clutch mounting box 2 are connected through a valve 9. The valve 9 is used to fill the clutch mounting box 2 with coolant after opening, and the drive box 1 still retains a liquid level height for the cooling pump 8 to circulate. A temperature sensor 10 for detecting the temperature of the clutch is provided in the clutch mounting box 2. A controller is fixedly connected to the drive box 1. The controller is used to open the valve 9 when the temperature detected by the temperature sensor 10 exceeds a preset value. The controller is used to control the motor 5 to run alternately to provide driving force for the power output shaft 6.

[0043] The mounting frame 3 is used to provide a mounting position for the clutch to ensure that the clutch does not generate additional vibration during the test process. After the clutch is installed, it is matched with the power input end. When conducting the endurance test, the drive member can simulate the engine output of the car, and the electric shifter 4 can automatically trigger the shifting action. The endurance test is conducted based on the electric shifter 4 continuously shifting and accumulating the number of times the clutch is used.

[0044] The durability test needs to be run continuously to achieve the effect of quickly obtaining the durability test results. During this process, the drive will run continuously, thereby accumulating heat. The coolant can conduct heat and circulate cooling through the cooling pump 8 to reduce the probability of overheating of the drive. At the same time, the two motors 5 can be used alternately, so that a single motor 5 can get enough rest after work, thereby reducing the shortened life or performance degradation caused by fatigue and overheating of a single motor 5. The clutch will also overheat if it is used continuously. Especially after aging, the clutch structure may become fatigued or damaged, causing the clutch to burn. When the clutch burns, it will produce a burnt smell. It can often be handled in time by the staff during the day, but because the durability test is automated, it can also be performed at night. At this time, it may be difficult for the staff to handle it in time, which will evolve into a greater safety hazard. In addition, the clutch is different from the drive. The clutch is a test piece, and its operating environment should be the same as the actual application link. The additional cooling system will affect the test results.

[0045] The temperature sensor 10 can detect the clutch temperature. When the clutch temperature is overheated, the drive member and the electric shifter 4 are stopped to prevent further temperature rise. At the same time, the valve 9 is opened, and the coolant in the drive box 1 flows into the clutch mounting box 2, so that the clutch is cooled quickly and the risk of combustion caused by its overheating is reduced. At the same time, the coolant level in the drive box 1 meets the liquid level of the cooling pump 8 circulation, so that the cooling cycle can still be triggered after the coolant is injected into the clutch mounting box 2, thereby achieving a permanent cooling.

[0046] The drive member and the clutch share a cooling system, which does not require additional expansion of the coolant storage space, and uses a cooling pump 8 together, which can automatically reduce the risk of accidents caused by clutch fatigue overheating.

[0047] An air inlet 11 is provided on the side wall of the clutch mounting box 2 , and the air inlet 11 is located on a side of the clutch mounting box 2 away from the cooling pump 8 .

[0048] The clutch is also cooled by air in normal conditions, and the air inlet 11 can provide gas for cooling the clutch. Since the cooling pump 8 may cause the outside air to heat up, the air inlet 11 is located on a side of the clutch mounting box 2 away from the cooling pump 8.

[0049] A one-way valve is provided in the air inlet 11 , and the one-way valve is used to control the air intake amount and air intake time in the clutch mounting box 2 .

[0050] The air intake of the clutch mounting box 2 can be controlled by the one-way valve, so that the clutch mounting box 2 can simulate the air intake environment of the car.

[0051] An air outlet 12 is arranged on the top of the clutch installation box 2 , and a waterproof and breathable membrane is arranged inside the air outlet 12 .

[0052] The air outlet 12 can provide exhaust, and the hot air flow generated when the clutch is cooled will be discharged from the air outlet 12. The waterproof and breathable membrane can prevent the coolant from overflowing from the air outlet 12 when the coolant is injected.

[0053] The cooling pump 8 comprises a pump body, and the pump body is provided with a liquid inlet pipe and a liquid outlet pipe which are communicated with the driving box 1, and semiconductor refrigerators are provided on the liquid inlet pipe and the liquid outlet pipe.

[0054] The inlet and outlet pipes can pump out the coolant and cool it down through the semiconductor refrigerator to control the overall temperature of the coolant. The semiconductor refrigerator can transport heat, reduce the temperature of the inlet and outlet pipes, and directly discharge the heat into the air.

[0055] A load shaft 13 is provided in the clutch mounting box 2. The load shaft 13 is detachably connected to the power output end of the clutch. The load shaft 13 extends outside the clutch mounting box 2. One end of the load shaft 13 outside the clutch mounting box 2 is fixedly connected to a load mounting block 14.

[0056] The load shaft 13 can simulate the load in the operation of the automobile, and a weight block for simulating the load is assembled through the load mounting block 14 to simulate the use in the operation of the automobile.

[0057] A display 15 is provided on the top of the clutch mounting box 2 , and the display 15 is used to display the clutch shifting times based on the number of times the electric shifter 4 is started.

[0058] The display 15 can display the clutch shift times, so that the user can understand the real-time test conditions.

[0059] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A gearbox reversing clutch durability test device, characterized in that: The invention comprises a drive box (1) and a clutch installation box (2), wherein a mounting frame (3) for mounting a clutch is arranged in the clutch installation box (2), an electric shifter (4) for switching the gear position of the clutch is arranged in the clutch installation box (2), a driving member is arranged in the drive box (1), the driving member is provided with a power output shaft (6), the power output shaft (6) extends into the clutch installation box (2), the power output shaft (6) is used to cooperate with the power input end of the clutch, and a detector (7) for respectively detecting the rotation speed of the power output shaft (6) and the power output end of the clutch is arranged in the clutch installation box (2); The drive box (1) is filled with coolant, and a cooling pump (8) for cooling and circulating the coolant is installed at the bottom of the drive box (1). The drive box (1) and the clutch installation box (2) are connected via a valve (9). The valve (9) is used to allow the coolant to fill the clutch installation box (2) after it is opened, and the drive box (1) still retains a liquid level height for the cooling pump (8) to circulate. A temperature sensor (10) for detecting the temperature of the clutch is provided in the clutch installation box (2). A controller is fixedly connected to the drive box (1), and the controller is used to open the valve (9) when the temperature detected by the temperature sensor (10) exceeds a preset value.

2. The gearbox reversing clutch durability test device according to claim 1, characterized in that: The electric shifter (4) is one of an electromagnetic switch group and an electric push rod group.

3. The gearbox reversing clutch durability test device according to claim 2, characterized in that: The driving member comprises two motors (5), the motors (5) are respectively located on both sides of the power output shaft (6), and the motors (5) and the power output shaft (6) are both driven by gears.

4. The gearbox reversing clutch durability test device according to claim 3, characterized in that: The controller is used to control the motor (5) to run alternately to provide driving force to the power output shaft (6).

5. The gearbox reversing clutch durability test device according to claim 4, characterized in that: An air inlet (11) is provided on a side wall of the clutch installation box (2), and the air inlet (11) is located on a side of the clutch installation box (2) away from the cooling pump (8).

6. The gearbox reversing clutch durability test device according to claim 5, characterized in that: A one-way valve is arranged in the air inlet (11), and the one-way valve is used to control the air intake amount and air intake time in the clutch installation box (2).

7. The gearbox reversing clutch durability test device according to claim 6, characterized in that: The top of the clutch installation box (2) is provided with an air outlet (12), and a waterproof and breathable membrane is provided inside the air outlet (12).

8. The transmission reversing clutch durability testing device according to claim 7, characterized in that: The cooling pump (8) comprises a pump body, the pump body is provided with a liquid inlet pipe and a liquid outlet pipe which are connected with the drive box (1), and semiconductor refrigerators are provided on the liquid inlet pipe and the liquid outlet pipe.

9. The gearbox reversing clutch durability test device according to claim 8, characterized in that: A load shaft (13) is arranged inside the clutch installation box (2), the load shaft (13) is detachably connected to the power output end of the clutch, the load shaft (13) extends outside the clutch installation box (2), and one end of the load shaft (13) located outside the clutch installation box (2) is fixedly connected to a load installation block (14).

10. The transmission reversing clutch durability testing device according to claim 9, characterized in that: A display (15) is provided on the top of the clutch installation box (2), and the display (15) is used to display the clutch shifting times based on the number of times the electric shifter (4) is started.

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