Automatic oil injection system for EOL electric drive assembly offline

Abstract

The invention relates to the technical field of new energy electric drive assembly detection, in particular to an EOL electric drive assembly offline automatic oil injection system which comprises an oil injection tank used for providing lubricating oil, and the oil injection tank is matched with an oil injection pump and injects oil outwards through an oil injection pipe; the oil return tank is used for storing circulating oil and is matched and communicated with the oil pumping pipeline, and the oil pumping pump pumps the lubricating oil in the detected electric drive assembly into the oil return tank; a circulating pump is arranged between the oil return tank and the oil injection tank and used for conveying oil in the oil return tank to the oil injection tank. And the controller is used for controlling the oil injection pump, the circulating pump and the oil well pump to start and stop. Lubricating oil is injected into the electric drive assembly by controlling the oil injection pump, the oil well pump pumps out the lubricating oil in the electric drive assembly, and the circulating pump supplements oil into the oil injection tank, so that lubricating oil supply circulation of the electric drive assembly in the off-line detection process is achieved, the accuracy and flexibility of lubricating oil injection are improved, the efficiency is improved, and the production cost is reduced. And errors caused by manual operation are also avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of new energy electric drive assembly detection, and particularly relates to an EOL electric drive assembly offline automatic oil injection system. Background Art

[0002] As the core power output component of new energy vehicles, the new energy vehicle electric drive assembly is mainly composed of a drive motor, a motor controller, and a gearbox. The new energy electric drive assembly offline test system has become the mainstream system for new energy electric vehicle testing.

[0003] Among them, the main function of the gearbox is to transmit the power of the drive motor, reduce the output speed, and increase the output torque to ensure that the torque and speed finally output by the drive motor meet the vehicle requirements. The mechanical part of the gearbox power transmission mainly relies on multiple-stage gears to achieve speed reduction and torque increase. Therefore, the lubrication of the gearbox gears is a key link that needs to be focused on during the testing process. The lubrication of the gearbox is mainly achieved by adding lubricating oil into the gearbox.

[0004] In the previous testing process, the operator manually measured the lubricating oil with a measuring cup and then injected the lubricating oil in the measuring cup into the gearbox; this process requires manual participation by the operator, which is time-consuming and laborious; after the electric drive assembly is produced, the product transmission line transports it to the new energy electric drive assembly offline test system for testing. If the test scheme of manually filling the lubricating oil before the test and then manually draining the oil after the test is still adopted, it will completely not meet the production efficiency.

[0005] Therefore, there is still room for urgent improvement in the current electric drive assembly detection oil injection and drainage scheme, and it should be optimized to improve the convenience and efficiency of oil injection and drainage during the detection process of the electric drive assembly. Therefore, a more reasonable technical solution needs to be proposed to solve the technical problems existing in the prior art. Summary of the Invention

[0006] To at least overcome one of the above-mentioned defects, the present invention proposes an EOL (End of Line) electric drive assembly offline automatic oil injection system, which improves the convenience of oil injection and drainage by optimizing and improving the system connection structure.

[0007] To achieve the above object, the automatic oil injection system disclosed by the present invention can adopt the following technical solutions:

[0008] An EOL electric drive assembly offline automatic oil injection system includes an oil injection tank for providing lubricating oil, the oil injection tank is matched with an oil injection pump and injects oil outward through an oil injection pipe; and a return oil tank for storing recycled oil, the return oil tank is matched and connected to an oil suction pipeline, and an oil suction pump sucks the lubricating oil in the electric drive assembly that has completed the detection into the return oil tank; a circulation pump is arranged between the return oil tank and the oil injection tank to transport the oil in the return oil tank to the oil injection tank; it further includes a controller, and the controller is used to control the start and stop of the oil injection pump, the circulation pump, and the oil suction pump.

[0009] The above - disclosed automatic lubricating system provides lubricating oil to the electric drive assembly through a lubricating oil tank for off - line inspection, sucks out the lubricating oil in the electric drive assembly through a suction pump and sends it to a return oil tank, and replenishes oil from the return oil tank to the lubricating oil tank through a circulation pump. Under the control of the controller, it can realize the automatic lubricating and oil sucking for the inspection of the electric drive assembly, greatly improving the efficiency of lubricating and oil sucking of the electric drive assembly, thereby improving the inspection efficiency.

[0010] Furthermore, in order to maintain the lubricating performance of the lubricating oil entering the electric drive assembly, it is necessary to keep it at an appropriate temperature. Therefore, the structure of the lubricating oil tank is improved to meet the heating requirements. Its structure is not uniquely limited, and one feasible option is optimized and proposed here: the lubricating oil tank includes a heating tank and a lubricating oil tank disposed within the heating tank. The heating tank stores heating medium oil, and the liquid level height is measured by a second liquid level sensor on the heating tank; the lubricating oil tank stores lubricating oil, and the liquid level height is measured by a first liquid level sensor on the lubricating oil tank. When the above - mentioned scheme is adopted, the heating medium oil set in the heating tank is heated by a heating device and heats the lubricating oil in the lubricating oil tank. Both the first liquid level sensor and the second liquid level sensor are used to detect the liquid level height in the corresponding tank and send the detection results to the controller. When the liquid level is too low, the controller controls the alarm device to give an alarm.

[0011] Furthermore, during the operation of the lubricating system, the temperature of the lubricating oil is monitored in real - time, which can be achieved through various schemes. One feasible option is proposed here: a first temperature sensor and a first breather valve are provided on the lubricating oil tank; a second temperature sensor and a second breather valve are provided on the heating tank. When the above - mentioned scheme is adopted, the detection values of the first temperature sensor and the second temperature sensor are both sent to the controller; when the temperature in the lubricating oil tank and the heating tank rises and the internal air pressure rises, the first breather valve and the second breather valve can be used to exhaust air outward to achieve air pressure balance.

[0012] Furthermore, in order to improve the cleanliness of the lubricating oil and better control the filling amount of the lubricating oil, the lubricating oil is filtered and purified. One feasible option is optimized and proposed here: a circulation filter is provided on the return oil tank. The circulation filter is connected to the oil - sucking pipeline and filters the lubricating oil from the oil - sucking pipeline.

[0013] Still further, an oil - filling filter is provided on the lubricating oil tank. The oil - filling filter is connected to the oil - filling pipe and filters the lubricating oil output from the lubricating oil tank.

[0014] Furthermore, the circulation filter provided on the oil return tank or the oil filling filter provided on the oil filling tank includes a three-stage filtering structure and is filtered through at least two parallel filtering branches in a shunt manner. When adopting the above solution, the first-stage filtering structure can adopt a stainless steel primary filter, the second-stage filtering structure can adopt a stainless steel filter screen and magnetic adsorption filtering, and the third-stage filtering structure can adopt a polymer material filter element.

[0015] Furthermore, both the oil filling tank and the oil return tank need to be cleaned, so optimization is carried out here: a lubricating oil drain pipe is provided on the lubricating oil tank, a heating tank drain pipe is provided on the heating tank, and an oil return tank drain pipe is provided on the oil return tank. When adopting the above solution, the corresponding tank can be emptied and cleaned through the drain pipe.

[0016] Furthermore, when heating the lubricating oil, the uniformity of the lubricating oil temperature rise needs to be maintained, so optimization is carried out here: a stirring assembly is provided on the oil filling tank. The stirring assembly includes a stirring motor provided on the oil filling tank and a stirring head extending into the oil filling tank, and the stirring motor drives the stirring head to rotate synchronously. When adopting the above solution, the stirring head can adopt stirring blades, which are driven by the stirring motor to rotate, so as to stir the lubricating oil in the lubricating oil tank and achieve uniform heating and temperature rise.

[0017] Furthermore, when the automatic oil filling system is operating, it will actively monitor and issue an alarm according to the oil filling situation. Specifically: it further includes an alarm, the alarm is connected to the controller, and the controller controls the start and stop of the alarm.

[0018] Furthermore, the controller can adopt various solutions, and its structure is not uniquely limited. Optimization is carried out here and one feasible option is proposed: the controller includes a box body, a control unit is arranged in the box body, and a control switch corresponding to and cooperating with the control unit is further included.

[0019] Compared with the prior art, some beneficial effects of the disclosed technical solution of the present invention include:

[0020] The present invention realizes the lubricating oil supply cycle during the offline detection process of the electric drive assembly by controlling the oil injection pump to inject lubricating oil into the electric drive assembly, pumping out the lubricating oil in the electric drive assembly through the oil extraction pump, and replenishing oil into the oil filling tank through the circulation pump, improving the accuracy and flexibility of lubricating oil injection, improving the efficiency, and also avoiding errors caused by manual operation. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as a limitation of the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0022] Figure 1 It is a schematic diagram of the overall structure of this automatic oil injection system.

[0023] Figure 2 It is a schematic diagram of the structure of the automatic oil injection system from another perspective.

[0024] Figure 3 It is a side view schematic diagram of the automatic oil injection system.

[0025] Figure 4 For Figure 3 Cross-sectional view of.

[0026] In the above-mentioned drawings, the meanings of the respective markings are as follows:

[0027] 1. Oil injection tank; 101. Heating tank; 102. Lubricating oil tank; 2. Return oil tank; 3. Stirring assembly; 4. Oil injection pump; 5. Circulation pump; 6. Oil extraction pump; 7. Controller; 8. First temperature sensor; 9. First breather valve; 10. Second temperature sensor; 11. Second breather valve; 12. Circulation filter; 13. Oil injection filter; 14. Filter branch; 15. Return oil tank sewage pipe; 16. Lubricating oil sewage pipe; 17. Heating tank sewage pipe. Specific embodiments

[0028] The following will further explain this embodiment in conjunction with the drawings and specific embodiments.

[0029] Aiming at the problems of low efficiency and low accuracy in the existing manual oil injection for the offline testing of electric drive assemblies, the following embodiments are optimized and overcome the defects existing in the prior art.

[0030] Embodiment

[0031] As Figures 1 to 4 shown, this embodiment provides an EOL electric drive assembly offline automatic oil injection system, including an oil injection tank 1 for providing lubricating oil, the oil injection tank 1 is matched with an oil injection pump 4 and injects oil outward through an oil injection pipe; and a return oil tank 2 for storing circulating oil, the return oil tank 2 is matched and connected to an oil extraction pipeline, and an oil extraction pump 6 pumps the lubricating oil in the electric drive assembly that has completed the detection into the return oil tank 2; a circulation pump 5 is arranged between the return oil tank 2 and the oil injection tank 1 for transporting the oil liquid in the return oil tank 2 to the oil injection tank 1; it also includes a controller 7, and the controller 7 is used to control the start and stop of the oil injection pump 4, the circulation pump 5 and the oil extraction pump 6.

[0032] The automatic oil injection system disclosed in this embodiment provides lubricating oil to the electric drive assembly through the oil injection tank 1 for offline inspection, sucks out the lubricating oil in the electric drive assembly through the oil pump 6 and sends it to the return oil tank 2, and replenishes oil from the return oil tank 2 to the oil injection tank 1 through the circulation pump 5. Under the control of the controller 7, it can realize the automatic oil injection and oil pumping for the inspection of the electric drive assembly, greatly improving the efficiency of oil injection and oil pumping for the electric drive assembly, and thus improving the inspection efficiency.

[0033] Preferably, in this embodiment, under the control of the controller 7, the accuracy can reach ±0.05L during the oil injection process.

[0034] In order to maintain the lubricating performance of the lubricating oil entering the electric drive assembly, it is necessary to keep it at an appropriate temperature. Therefore, the structure of the oil injection tank 1 is improved to meet the heating requirements. Its structure is not uniquely limited. This embodiment is optimized and one feasible option is adopted: the oil injection tank 1 includes a heating tank 101 and a lubricating oil tank 102 arranged in the heating tank 101. The heating tank 101 stores heating medium oil, and the liquid level height is measured by the second liquid level sensor on the heating tank 101; the lubricating oil tank 102 stores lubricating oil, and the liquid level height is measured by the first liquid level sensor on the lubricating oil tank 102. When the above scheme is adopted, the heating medium oil arranged in the heating tank 101 is heated by the heating device and heats the lubricating oil in the lubricating oil tank 102. The first liquid level sensor and the second liquid level sensor are both used to detect the liquid level height in the corresponding tank body and send the detection results to the controller 7. When the liquid level is too low, the controller 7 controls the alarm device to give an alarm.

[0035] During the operation of the oil injection system, the temperature of the lubricating oil is monitored in real time, which can be achieved through various schemes. This embodiment adopts one feasible option: the lubricating oil tank 102 is provided with a first temperature sensor 8 and a first breathing valve 9; the heating tank 101 is provided with a second temperature sensor 10 and a second breathing valve 11. When the above scheme is adopted, the detection values of the first temperature sensor 8 and the second temperature sensor 10 are both sent to the controller 7; when the temperature in the lubricating oil tank 102 and the heating tank 101 rises and the internal air pressure rises, the first breathing valve 9 and the second breathing valve 11 can be used to exhaust air outward to achieve air pressure balance.

[0036] In order to improve the cleanliness of the lubricating oil and better control the filling amount of the lubricating oil, the lubricating oil is filtered and purified. This embodiment is optimized and one feasible option is adopted: the return oil tank 2 is provided with a circulation filter 12, and the circulation filter 12 is connected to the oil pumping pipeline and filters the lubricating oil from the oil pumping pipeline.

[0037] An oil filling filter 13 is provided on the described oil filling tank 1. The oil filling filter 13 is connected to an oil filling pipe and filters the lubricating oil output by the oil filling tank 1.

[0038] The circulation filter 12 provided on the oil return tank 2 or the oil filling filter 13 provided on the oil filling tank 1 both include a three-stage filtering structure and are filtered through at least two parallel filtering branches 14 for diversion. When adopting the above scheme, the primary filtering structure can adopt a stainless steel primary filter, the secondary filtering structure can adopt a stainless steel filter screen and magnetic adsorption filtering, and the tertiary filtering structure can adopt a polymer material filter element.

[0039] Preferably, in this embodiment, the circulation filter 12 and the oil filling filter 13 can achieve a filtering accuracy of 10 microns.

[0040] Both the oil filling tank 1 and the oil return tank 2 need to be cleaned. Therefore, this embodiment is optimized: a lubricating oil drain pipe 16 is provided on the described lubricating oil tank 102, a heating tank drain pipe 17 is provided on the heating tank 101, and an oil return tank drain pipe 15 is provided on the oil return tank 2. When adopting the above scheme, the corresponding box body can be emptied and cleaned through the drain pipe.

[0041] When heating the lubricating oil, the uniformity of the lubricating oil temperature rise should be maintained. This embodiment is optimized: a stirring assembly 3 is provided on the oil filling tank 1. The stirring assembly 3 includes a stirring motor provided on the oil filling tank 1 and a stirring head extending into the oil filling tank 1. The stirring motor drives the stirring head to rotate synchronously. When adopting the above scheme, the stirring head can adopt stirring blades and is driven by the stirring motor to rotate, thereby stirring the lubricating oil in the lubricating oil tank and realizing uniform heating and temperature rise.

[0042] When the automatic oil filling system is operating, it will actively monitor and issue an alarm according to the oil filling situation. Specifically: it further includes an alarm, and the alarm is connected to the controller 7. The controller 7 controls the start and stop of the alarm.

[0043] The controller 7 can adopt various schemes, and its structure is not uniquely limited. This embodiment is optimized and one feasible option is adopted: the controller 7 includes a box body, a control unit is provided inside the box body, and a control switch corresponding to the control unit is further included.

[0044] The above are the implementation manners listed in this embodiment, but this embodiment is not limited to the above optional implementation manners. Those skilled in the art can obtain other various implementation manners by arbitrarily combining the above manners. Anyone can obtain other various forms of implementation manners under the inspiration of this embodiment. The above specific implementation manners should not be understood as limiting the protection scope of this embodiment. The protection scope of this embodiment should be defined by the claims.

Claims

1. An EOL electric drive assembly offline automatic oiling system, characterized by: The invention comprises an oil filling tank (1) for providing lubricating oil, the oil filling tank (1) cooperates with an oil filling pump (4) and fills oil outward through an oil filling pipe; and an oil return tank (2) for storing circulating oil, the oil return tank (2) cooperates with a connected oil extraction pipeline, and an oil extraction pump (6) extracts lubricating oil in the electric drive assembly that has completed the inspection into the oil return tank (2); a circulating pump (5) is arranged between the oil return tank (2) and the oil filling tank (1) to transport the oil in the oil return tank (2) to the oil filling tank (1); and also comprises a controller (7), the controller (7) is used to control the start and stop of the oil filling pump (4), the circulating pump (5) and the oil extraction pump (6).

2. The EOL electric drive assembly offline automatic oiling system according to claim 1 is characterized by: The oil filling tank (1) comprises a heating box (101) and a lubricating oil tank (102) arranged in the heating box (101); the heating box (101) stores heating medium oil, and the liquid level height is measured by a second liquid level sensor on the heating box (101); the lubricating oil tank (102) stores lubricating oil, and the liquid level height is measured by a first liquid level sensor on the lubricating oil tank (102).

3. The EOL electric drive assembly offline automatic oiling system according to claim 2 is characterized by: The lubricating oil tank (102) is provided with a first temperature sensor (8) and a first breathing valve (9); the heating box (101) is provided with a second temperature sensor (10) and a second breathing valve (11).

4. The EOL electric drive assembly offline automatic oiling system according to claim 1 is characterized by: The oil return tank (2) is provided with a circulation filter (12), which is connected to the oil extraction pipeline and filters the lubricating oil from the oil extraction pipeline.

5. The EOL electric drive assembly offline automatic oiling system according to claim 1 is characterized by: The oil filling box (1) is provided with an oil filling filter (13), and the oil filling filter (13) is connected to the oil filling pipe and filters the lubricating oil output from the oil filling box (1).

6. The EOL electric drive assembly offline automatic oil injection system according to claim 4 or 5, characterized in that: The circulation filter (12) arranged on the oil return tank (2) or the oil injection filter (13) arranged on the oil injection tank (1) comprises a three-stage filtering structure, and performs filtering by diverting the flow through at least two parallel filtering branches (14).

7. The EOL electric drive assembly offline automatic oil injection system according to claim 2 is characterized by: The lubricating oil tank (102) is provided with a lubricating oil drain pipe (16), the heating box (101) is provided with a heating box drain pipe (17), and the oil return tank (2) is provided with an oil return tank drain pipe (15).

8. The EOL electric drive assembly offline automatic oiling system according to claim 1 is characterized by: The oil filling box (1) is provided with a stirring assembly (3), which comprises a stirring motor arranged on the oil filling box (1) and a stirring head extending into the oil filling box (1), and the stirring motor drives the stirring head to rotate synchronously.

9. The EOL electric drive assembly offline automatic oil injection system according to claim 1, characterized in that: It also includes an alarm, which is connected to a controller (7), and the controller (7) controls the start and stop of the alarm.

10. The EOL electric drive assembly offline automatic oil injection system according to claim 1, characterized in that: The controller (7) comprises a box body, a control unit is arranged in the box body, and also comprises a control switch corresponding to the control unit.

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