Automatic oil injection system for EOL electric drive assembly offline

Abstract

The utility model relates to the technical field of new energy electric drive assembly detection, in particular to an automatic oil injection system for EOL electric drive assembly offline, 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 utility model relates to new energy electric drive assembly detection technical field, concretely relates to a kind of EOL electric drive assembly off-line automatic oil injection system. BACKGROUND

[0002] As the power output core component of new energy vehicle, new energy vehicle electric drive assembly is mainly composed of driving motor, motor controller and gearbox. New energy electric drive assembly off-line test system has become the mainstream system of new energy electric vehicle test.

[0003] Among them, the main function of gearbox is to transmit the power of driving motor, reduce output speed and improve output torque, to ensure that the torque and speed of driving motor final output meet the vehicle demand. The mechanical part of gearbox power transmission mainly relies on multi-stage gear to realize speed reduction and torque increase, therefore, the lubrication of gearbox gear is the link that needs to be focused on in the test process. Lubrication of gearbox is mainly realized by adding lubricating oil into gearbox.

[0004] In the past test process, operator measures by measuring cup manually, and then injects the lubricating oil in measuring cup into gearbox after measurement;This process needs operator to participate manually, and it is time-consuming and laborious;After the production of electric drive assembly is completed, product conveying line transports it to new energy electric drive assembly off-line test system for testing, if still using the test scheme of manually adding lubricating oil before test and manually draining oil after test, it will completely fail to meet the production efficiency.

[0005] Therefore, the current electric drive assembly detection oil injection and drainage scheme still has room for improvement, and should be optimized to improve the convenience and efficiency of oil injection and drainage of electric drive assembly in the detection process. Therefore, a more reasonable technical scheme is needed to solve the technical problems existing in the prior art. UTILITY MODEL CONTENT

[0006] At least to overcome one of the above-mentioned defects, the utility model provides an EOL (End of Line) electric drive assembly off-line automatic oil injection system, which improves the convenience of oil injection and drainage by optimizing the system connection structure.

[0007] In order to achieve the above purpose, the automatic oil injection system disclosed by the utility model can adopt the following technical scheme:

[0008] The application discloses an automatic oil injection system for an EOL electric drive assembly, which comprises an oil injection tank for providing lubricating oil, an oil injection pump matched with the oil injection tank and an oil injection pipe for injecting the lubricating oil outside; an oil return tank for storing circulating oil, an oil extraction pump matched with an oil extraction pipe for extracting the lubricating oil in the electric drive assembly into the oil return tank, a circulating pump arranged between the oil return tank and the oil injection tank for conveying the oil in the oil return tank to the oil injection tank, and a controller for controlling the oil injection pump, the circulating pump and the oil extraction pump.

[0009] The automatic oil injection system can provide the lubricating oil for the electric drive assembly for offline detection, extract the lubricating oil in the electric drive assembly into the oil return tank by the oil extraction pump, and supplement the oil from the oil return tank to the oil injection tank by the circulating pump.

[0010] Further, in order to maintain the lubricating performance of the lubricating oil entering the electric drive assembly, the temperature of the lubricating oil needs to be maintained, and therefore, the structure of the oil injection tank is improved to meet the heating requirement, and the structure is not uniquely limited, and one of the feasible options is optimized and provided as follows: the oil injection tank comprises a heating tank and a lubricating oil tank arranged in the heating tank, the heating tank is used for storing heating medium oil, and the height of the liquid level in the heating tank is measured by a second liquid level sensor on the heating tank; the lubricating oil tank is used for storing lubricating oil, and the height of the liquid level in the lubricating oil tank is measured by a first liquid level sensor on the lubricating oil tank. When the above scheme is adopted, the heating medium oil arranged in the heating tank is heated by a heating device, and the lubricating oil in the lubricating oil tank is heated. The first liquid level sensor and the second liquid level sensor are used for detecting the height of the liquid level in the corresponding tank, and the detection is transmitted to the controller, and when the liquid level is too low, the controller controls an alarm device to alarm.

[0011] Further, the temperature of the lubricating oil is monitored in real time during the operation of the oil injection system, and one of the feasible options is provided as follows: the lubricating oil tank is provided with a first temperature sensor and a first breathing valve; and the heating tank is provided with a second temperature sensor and a second breathing valve. When the above scheme is adopted, the detection values of the first temperature sensor and the second temperature sensor are transmitted to the controller; when the temperature in the lubricating oil tank and the heating tank is increased, the internal air pressure is increased, and the air can be discharged to the outside through the first breathing valve and the second breathing valve to balance the air pressure.

[0012] Further, in order to improve the cleanliness of the lubricating oil and better control the injection amount of the lubricating oil, the lubricating oil is filtered and purified, and one of the feasible options is optimized and provided as follows: the oil return tank is provided with a circulating filter, the circulating filter is communicated with the oil extraction pipe and filters the lubricating oil from the oil extraction pipe.

[0013] Further, the oil injection tank is provided with an oil injection filter, the oil injection filter is communicated with the oil injection pipe and filters the lubricating oil output by the oil injection tank.

[0014] Further, the circulating filter arranged on the oil return tank or the oil injection filter arranged on the oil injection tank comprises a three-stage filter structure and is filtered through at least two parallel filter branches.

[0015] Further, the oil injection tank and the oil return tank need to be cleaned, and therefore, the lubricating oil tank is provided with a lubricating oil blowdown pipe, the heating tank is provided with a heating tank blowdown pipe, and the oil return tank is provided with an oil return tank blowdown pipe.

[0016] Further, when the lubricating oil is heated, the uniformity of the heating of the lubricating oil needs to be maintained, and therefore, the oil injection tank is provided with a stirring assembly, the stirring assembly comprises a stirring motor arranged on the oil injection tank and a stirring head extended into the oil injection tank, and the stirring motor drives the stirring head to rotate synchronously.

[0017] Further, the automatic oil injection system actively monitors and issues an alarm according to the oil injection condition when the automatic oil injection system is operated, and specifically, the automatic oil injection system further comprises an alarm, the alarm is connected with the controller, and the controller controls the start and stop of the alarm.

[0018] Further, the controller can adopt various schemes, and the structure of the controller is not uniquely limited, and therefore, the controller is optimized and one feasible selection is provided, that is, the controller comprises a tank body, the tank body is provided with a control unit, and the tank body further comprises a control switch matched with the control unit.

[0019] Compared with the prior art, some beneficial effects of the technical scheme of the utility model include:

[0020] The utility model discloses a control oil injection pump realizes the lubricating oil injection of electric drive assembly, through the oil pump, the lubricating oil in electric drive assembly is extracted, and through the circulating pump, the oil is supplemented to the oil injection tank, thereby realizes the lubricating oil supply circulation of electric drive assembly in the offline detection process, improves the precision and flexibility of lubricating oil injection, improves the efficiency, also avoids the error caused by manual operation. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some of the embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the premise of the drawings.

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

[0025] Figure 4 It is a sectional view of Figure 3 .

[0026] In the above drawings, the meanings of the respective marks are as follows:

[0027] 1, oil injection tank; 101, heating tank; 102, lubricating oil tank; 2, oil return tank; 3, stirring assembly; 4, oil injection pump; 5, circulating pump; 6, oil extraction pump; 7, controller; 8, first temperature sensor; 9, first breather valve; 10, second temperature sensor; 11, second breather valve; 12, circulating filter; 13, oil injection filter; 14, filter branch; 15, oil return tank blowdown pipe; 16, lubricating oil blowdown pipe; 17, heating tank blowdown pipe. DETAILED DESCRIPTION

[0028] The present embodiment will be further explained in combination with the drawings and specific embodiments.

[0029] The existing EOL electric drive assembly offline test needs to be manually injected, which has the problems of low efficiency and low accuracy. The following embodiments optimize and overcome the defects of the prior art.

[0030] EMBODIMENT

[0031] As shown in Figures 1-4 , the present embodiment provides an EOL electric drive assembly offline automatic oil injection system, which comprises an oil injection tank 1 for providing lubricating oil, the oil injection tank 1 cooperates with an oil injection pump 4 and injects oil outward through an oil injection pipe; and an oil return tank 2 for storing circulating oil, the oil return tank 2 cooperates with a communication oil extraction pipeline, an oil extraction pump 6 extracts the lubricating oil in the electric drive assembly after detection into the oil return tank 2; a circulating pump 5 is arranged between the oil return tank 2 and the oil injection tank 1, for delivering the oil in the oil return tank 2 to the oil injection tank 1; and a controller 7 is further included, the controller 7 is used to control the start and stop of the oil injection pump 4, the circulating pump 5 and the oil extraction pump 6.

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

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

[0034] In order to maintain the lubricating performance of the lubricating oil entering the electric drive assembly, it is necessary to maintain its temperature at a suitable temperature, so the structure of the oil injection tank 1 is improved to meet the heating requirement, and the structure is not uniquely limited. The embodiment is optimized and one of the feasible options is adopted: the oil injection tank 1 comprises 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 a 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 a 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 the lubricating oil in the lubricating oil tank 102 is heated. The first liquid level sensor and the second liquid level sensor are used to detect the liquid level height in the corresponding tank, and the detection is sent to the controller 7, and when the liquid level is too low, the controller 7 controls the alarm device to alarm.

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

[0036] In order to improve the cleanliness of the lubricating oil and better control the injection amount of the lubricating oil, the lubricating oil is filtered and purified, and one of the feasible options is adopted in the embodiment: the oil return tank 2 is provided with a circulating filter 12, which is in communication with the oil pumping pipeline and filters the lubricating oil from the oil pumping pipeline.

[0037] The oil injection tank 1 is provided with an oil injection filter 13 which is communicated with the oil injection pipe and filters the lubricating oil output from the oil injection tank 1.

[0038] The circulating filter 12 provided on the oil return tank 2 or the oil injection filter 13 provided on the oil injection tank 1 both include a three-stage filtering structure and are filtered through at least two parallel filtering branches 14. When the above scheme is adopted, 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 a magnetic adsorption filter, and the third-stage filtering structure can adopt a high polymer material filter core.

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

[0040] The oil injection tank 1 and the oil return tank 2 both need to be cleaned, and therefore the embodiment is optimized in that the lubricating oil tank 102 is provided with a lubricating oil blowdown pipe 16, the heating tank 101 is provided with a heating tank blowdown pipe 17, and the oil return tank 2 is provided with an oil return tank blowdown pipe 15. When the above scheme is adopted, the corresponding tank can be emptied and cleaned through the blowdown pipe.

[0041] When the lubricating oil is heated, the uniformity of the heating of the lubricating oil needs to be maintained, and therefore the embodiment is optimized in that the oil injection tank 1 is provided with a stirring assembly 3 which includes a stirring motor provided on the oil injection tank 1 and a stirring head extended into the oil injection tank 1, and the stirring motor drives the stirring head to rotate synchronously. When the above scheme is adopted, the stirring head can adopt stirring blades which are driven to rotate by the stirring motor, so as to stir the lubricating oil in the lubricating oil tank and achieve uniform heating.

[0042] When the automatic oil injection system is in operation, the oil injection condition is actively monitored and an alarm is issued. Specifically, the automatic oil injection system further includes an alarm which is connected with the controller 7, and 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. The embodiment is optimized and one of the feasible options is adopted in that the controller 7 includes a tank body in which a control unit is arranged, and further includes a control switch which is correspondingly matched with the control unit.

[0044] The above is the embodiment listed in the embodiment, but the embodiment is not limited to the above optional implementation manner, and those skilled in the art can obtain other various implementation manners by arbitrarily combining the above manners. The above specific implementation manner should not be understood as a limitation on the protection scope of the embodiment, and the protection scope of the embodiment should be defined by the claims.

Claims

1. An automatic oil filling system for EOL electric drive assembly after production, characterized in that: The application relates to an oil injection and recycling system for an electric drive assembly, which comprises an oil injection tank (1) for providing lubricating oil, an oil injection pump (4) matched with the oil injection tank (1) and an oil injection pipe for externally injecting oil; an oil recycling tank (2) for storing circulating oil, an oil extraction pump (6) matched with an oil extraction pipeline and used for extracting lubricating oil in the electric drive assembly after detection into the oil recycling tank (2); a circulating pump (5) arranged between the oil recycling tank (2) and the oil injection tank (1) and used for conveying oil in the oil recycling tank (2) to the oil injection tank (1); and a controller (7) used for controlling the start and stop of the oil injection pump (4), the circulating pump (5) and the oil extraction pump (6).

2. The EOL electric drive assembly off-line automatic oiling system of claim 1, wherein: The oil injection tank (1) comprises 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 a 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 a first liquid level sensor on the lubricating oil tank (102).

3. The EOL electric drive assembly off-line automatic oiling system of claim 2, wherein: The lubricating oil tank (102) is provided with a first temperature sensor (8) and a first breather valve (9); and the heating tank (101) is provided with a second temperature sensor (10) and a second breather valve (11).

4. The EOL electric drive assembly off-line automatic oiling system of claim 1, wherein: The oil recycling tank (2) is provided with a circulating filter (12) which is communicated with the oil extraction pipeline and is used for filtering the lubricating oil from the oil extraction pipeline.

5. The EOL electric drive assembly off-line automatic oiling system of claim 1, wherein: The oil injection tank (1) is provided with an oil injection filter (13) which is communicated with the oil injection pipe and is used for filtering the lubricating oil output from the oil injection tank (1).

6. The EOL electric drive assembly off-line automatic oiling system according to claim 4 or 5, characterized in that: The circulating filter (12) arranged on the oil recycling tank (2) or the oil injection filter (13) arranged on the oil injection tank (1) comprises a three-stage filtering structure and is filtered through at least two parallel filtering branches (14).

7. The EOL electric drive assembly off-line automatic oiling system of claim 2, wherein: The lubricating oil tank (102) is provided with a lubricating oil blowdown pipe (16), the heating tank (101) is provided with a heating tank blowdown pipe (17), and the oil recycling tank (2) is provided with an oil recycling tank blowdown pipe (15).

8. The EOL electric drive assembly off-line automatic oiling system of claim 1, wherein: The oil injection tank (1) is provided with a stirring assembly (3) which comprises a stirring motor arranged on the oil injection tank (1) and a stirring head extended into the oil injection tank (1), and the stirring motor drives the stirring head to rotate synchronously.

9. The EOL electric drive assembly off-line automatic oiling system of claim 1, wherein: An alarm is further included, the alarm is connected with the controller (7), and the controller (7) controls the start and stop of the alarm.

10. The EOL electric drive assembly off-line automatic oiling system of claim 1, wherein: The controller (7) comprises a box body, a control unit is arranged in the box body, and a control switch matched with the control unit is further included.

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