An automatic oil filling device for electric motors

Abstract

This utility model discloses an automatic motor lubrication device, relating to the field of motor lubrication technology. It includes a mounting box with an internal mounting compartment and an energy storage compartment. The mounting compartment houses a lubrication assembly, and the energy storage compartment houses a battery pack. The lubrication assembly includes an oil tank, a filter, and a pump installed inside the mounting compartment. This design triggers a threshold action via a motor drive shaft temperature sensor, initiating lubrication through a complete automatic lubrication pathway constructed from the oil tank, filter, pump, and multiple connecting pipes within the lubrication assembly. After lubrication, a time relay controls the valve to close. The filter purifies the lubricating oil, reducing wear on the transmission device and extending equipment lifespan. Furthermore, lubrication can be performed without disassembling or lifting the battery pack, avoiding the cumbersome operation and safety risks of traditional manual lubrication, significantly improving the convenience and efficiency of lubrication operations.

Description

Technical Field

[0001] This utility model relates to the field of electric motor oil injection technology, and in particular to an automatic electric motor oil injection device. Background Technology

[0002] In the special working conditions of underground mines, characterized by high humidity, dust, and explosive gases, explosion-proof lithium-ion battery locomotives are core transportation equipment, widely used for personnel commuting, raw coal and material transfer. Through explosion-proof enclosures, thermal runaway prevention systems, and intrinsically safe electrical controls, they eliminate the risk of ignition sources and possess advantages such as stable power, long range, high energy density, fast charging, long lifespan, and zero emissions. They meet both underground safety requirements and green mining needs, making them key equipment for replacing traditional equipment and improving transportation efficiency and safety levels.

[0003] The transmission lubrication tank of the electric locomotive, which is commonly used for underground transportation in mines, is installed below the battery pack due to structural limitations. It needs to be refilled with oil multiple times a month. When refilling, the heavy battery pack needs to be lifted and moved in a limited space, which is not only time-consuming, labor-intensive, and inefficient, but also poses safety hazards such as falling during hoisting and collisions with personnel. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an automatic oil filling device for electric motors. By installing a temperature sensor on the transmission shaft of a battery-powered locomotive, a threshold is reached to trigger an electric valve to open the oil tank for automatic oil filling. After oil filling, a time relay closes the valve, thus avoiding safety hazards and improving efficiency.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an automatic oil injection device for an electric motor, comprising an installation box, wherein the installation box has an installation compartment and an energy storage compartment, the installation compartment contains an oil injection assembly, the energy storage compartment contains a battery pack, the oil injection assembly includes an oil storage tank, a filter device, and a pump body installed inside the installation compartment, the oil outlet of the oil storage tank is connected to a first connecting pipe, the other end of the first connecting pipe is connected to the oil inlet of the filter device, the oil outlet of the filter device is connected to a second connecting pipe, the other end of the second connecting pipe is connected to the input end of the pump body, and the output end of the pump body is connected to an oil injection pipe.

[0006] As a further technical solution of this utility model, the filter device is provided with a card plate inside, and a card slot is opened inside the filter device. The card plate and the card slot are used to hold the filter element.

[0007] As a further technical solution of this utility model, the bottom surface of the filter device is connected to a drain pipe, and the outer walls of the first connecting pipe, the second connecting pipe and the drain pipe are respectively equipped with a first solenoid valve, a second solenoid valve and a third solenoid valve.

[0008] As a further technical solution of this utility model, the filter device is provided with a cover plate, and a pressing assembly is installed on the bottom surface of the cover plate. The pressing assembly includes a housing installed on the bottom surface of the cover plate, and a telescopic rod is installed inside the housing.

[0009] As a further technical solution of this utility model, a spring is sleeved on the outer wall of the telescopic rod, a movable block is connected to the telescopic end of the telescopic rod, and a connecting rod and two sliders are installed on the outer wall of the movable block.

[0010] As a further technical solution of this utility model, the inside of the outer shell is provided with a sliding groove adapted to the two sliders, the bottom end of the connecting rod is equipped with a pressure block, and the inside of the cover plate is threaded with multiple bolts.

[0011] As a further technical solution of this utility model, the bottom surface of the filter device is equipped with four support legs, and the oil storage tank is equipped with a level gauge.

[0012] This utility model provides an automatic oil injection device for electric motors, which has the following advantages compared with the prior art:

[0013] 1. This design discloses an automatic oil injection device for electric motors. A temperature sensor is configured on the transmission shaft of a battery-powered electric locomotive. When the temperature reaches a set threshold, the sensor triggers an electric valve to operate, opening an automatic oil injection path constructed from the oil tank, filter, pump, and multiple connecting pipes in the oil injection assembly. After oil injection is completed, a time relay controls the valve to close. The filter purifies the lubricating oil, reducing wear on the transmission device caused by impurities and extending the service life of the equipment. Furthermore, oil injection can be completed through the oil injection pipe without disassembling or lifting the battery pack, avoiding the cumbersome operation and safety risks of traditional manual oil injection, and significantly improving the convenience and efficiency of oil injection operations.

[0014] 2. This design presents an automatic oil injection device for electric motors. The filter element is detachably engaged via a slot and a clamping plate. Combined with a cover plate and a clamping assembly, the device utilizes the elastic potential energy of a spring to drive a pressure block, ensuring stable clamping of the filter element. This guarantees both the secure installation and sealing performance of the filter element, and allows for quick replacement of the filter element by simply removing the cover plate with bolts. Simultaneously, solenoid valves installed on the drain pipe connected to the bottom of the filter device, along with the first and second connecting pipes, enable control of the oil injection path and directional discharge of filtered impurities. This prevents impurity accumulation from affecting the filtration effect, further improving the cleanliness and operational stability of the oil injection system and extending the equipment's service life. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the internal structure of the mounting box in an automatic oiling device for electric motors.

[0016] Figure 2 This is a schematic diagram of the internal structure of the oil injection component in an automatic oil injection device for electric motors.

[0017] Figure 3 This is a three-dimensional structural diagram of the oil injection component in an automatic oil injection device for an electric motor.

[0018] Figure 4 This is a schematic diagram of the internal structure of a filter device in an automatic oil filling device for an electric motor.

[0019] Figure 5 This is a schematic diagram of the internal structure of the clamping component in an automatic oiling device for an electric motor.

[0020] In the diagram: 1. Mounting box; 2. Mounting compartment; 3. Energy storage compartment; 4. Oil injection assembly; 401. Oil storage tank; 402. Filter device; 403. Pump body; 404. First connecting pipe; 405. Second connecting pipe; 406. Oil injection pipe; 5. First solenoid valve; 6. Second solenoid valve; 7. Drain pipe; 8. Third solenoid valve; 9. Clamping plate; 10. Clamping slot; 11. Filter element; 12. Cover plate; 13. Clamping assembly; 1301. Housing; 1302. Telescopic rod; 1303. Spring; 1304. Movable block; 1305. Connecting rod; 1306. Slider; 1307. Slide groove; 1308. Pressure block; 14. Bolt; 15. Support leg; 16. Liquid level gauge; 17. Battery pack. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-5This utility model provides a technical solution for an automatic oil filling device for an electric motor: it includes an installation box 1, which has an installation compartment 2 and an energy storage compartment 3 inside. The installation compartment 2 is equipped with an oil filling assembly 4, which, through the coordinated operation of its components, completes the storage, filtration, transportation, and filling of lubricating oil, achieving automatic oil filling. The energy storage compartment 3 is equipped with a battery pack 17. The oil filling assembly 4 includes an oil storage tank 401, a filter device 402, and a pump body 403 installed inside the installation compartment 2. The filter device 402 filters impurities from the lubricating oil, purifying the oil to protect the transmission device, and the pump body 403... A power source is provided to pressurize the lubricating oil in the oil storage tank 401 and deliver it to the oil injection pipe 406, ensuring the oil injection pressure and flow rate. The oil outlet of the oil storage tank 401 is connected to a first connecting pipe 404, and the other end of the first connecting pipe 404 is connected to the oil inlet of the filter device 402. The oil outlet of the filter device 402 is connected to a second connecting pipe 405, and the other end of the second connecting pipe 404 is connected to the input end of the pump body 403. The output end of the pump body 403 is connected to the oil injection pipe 406, wherein the oil injection pipe 406 serves as the final oil injection channel, delivering the pressurized lubricating oil to the lubrication part of the motor drive device.

[0023] The filter device 402 has a retaining plate 9 inside and a retaining groove 10 inside. The retaining plate 9 and the retaining groove 10 are used to hold a filter element 11. The filter element 11 traps impurities in the lubricating oil, purifies the oil, and prevents impurities from entering the transmission device and causing wear. The bottom surface of the filter device 402 is connected to a drain pipe 7, which directs the sediment and impurities trapped by the filter element 11 to prevent dirt accumulation inside the filter device 402 from affecting the filtration effect. The outer walls of the first connecting pipe 404, the second connecting pipe 405, and the drain pipe 7 are respectively equipped with a first solenoid valve 5, a second solenoid valve 6, and a third solenoid valve 8. The bottom surface of the filter device 402 is equipped with four support legs 15. The oil tank 401 is equipped with a level gauge 16 inside, which monitors the level of the lubricating oil in the oil tank 401 in real time, providing a direct feedback on the remaining oil level, so that operators can replenish the oil in time and avoid interruption of the oiling operation due to lack of oil.

[0024] The filter device 402 is provided with a cover plate 12, and a pressing assembly 13 is installed on the bottom surface of the cover plate 12. The pressing assembly 13 achieves stable fixation of the filter element 11 through elastic force, ensuring the sealing and reliability of the filtration process. The pressing assembly 13 includes a housing 1301 installed on the bottom surface of the cover plate 12. A telescopic rod 1302 is installed inside the housing 1301. A spring 1303 is sleeved on the outer wall of the telescopic rod 1302, and the spring 1303 drives the pressing block 1. 308 fits tightly against the filter element 11, compensating for the installation gap of the filter element 11 and enhancing the sealing effect. The telescopic end of the telescopic rod 1302 is connected to a movable block 1304. The outer wall of the movable block 1304 is equipped with a connecting rod 1305 and two sliders 1306. The interior of the outer shell 1301 is provided with a sliding groove 1307 that matches the two sliders 1306. The bottom end of the connecting rod 1305 is equipped with a pressure block 1308. The cover plate 12 is internally threaded with multiple bolts 14.

[0025] The working principle of this utility model is as follows: First, the installation chamber 2 and energy storage chamber 3 inside the installation box 1 achieve partitioned load-bearing. The installation chamber 2 contains an oil injection component 4, and the energy storage chamber 3 is equipped with a battery pack 17 to provide power support for the operation of the device. The oil tank 401 serves as a lubricating oil storage unit, and its internal level gauge 16 can monitor the oil level in real time for timely replenishment. When the temperature of the battery motor drive shaft rises to a set threshold, the temperature sensor sends a signal, triggering the opening of the first solenoid valve 5 and the second solenoid valve 6 and starting the pump body 403. The lubricating oil in the oil tank 401 enters the filter device 402 through the first connecting pipe 404. After impurities are filtered by the filter element 11, which is engaged by the card plate 9 and the card slot 10, it is transported to the pump body 403 through the second connecting pipe 405. After being pressurized by the pump body 403, it is transported to the lubrication part of the motor drive device through the oil injection pipe 406. Automatic oil filling is achieved. After the oil filling time is set and the set oil filling volume is reached, the time relay controls the first solenoid valve 5, the second solenoid valve 6, and the pump body 403 to close, completing a single oil filling cycle. The drain pipe 7 connected to the bottom of the filter device 402 cooperates with the third solenoid valve 8 on the outer wall to periodically open and discharge the impurities trapped by the filter element 11. The top cover plate 12 is fixed by multiple bolts 14. In the pressing assembly 13 on the bottom of the cover plate 12, the telescopic rod 1302 built into the outer shell 1301 is fitted with a spring 1303. The movable block 1304 connected to the telescopic rod 1302 slides along the slide groove 1307 through the slider 1306, which drives the pressure block 1308 at the bottom of the connecting rod 1305 to tightly fit the filter element 11 under the elastic potential energy of the spring 1303, ensuring the installation sealing and stability. When replacing the filter element 11, the bolts 14 can be removed and the cover plate 12 can be opened for operation.

[0026] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.

Claims

1. An automatic oil filling device for an electric motor, characterized in that, The system includes an installation box (1), which has an installation compartment (2) and an energy storage compartment (3) inside. The installation compartment (2) is equipped with an oil injection assembly (4), and the energy storage compartment (3) is equipped with a battery pack (17). The oil injection assembly (4) includes an oil tank (401), a filter device (402), and a pump body (403) installed inside the installation compartment (2). The oil outlet of the oil tank (401) is connected to a first connecting pipe (404), and the other end of the first connecting pipe (404) is connected to the oil inlet of the filter device (402). The oil outlet of the filter device (402) is connected to a second connecting pipe (405), and the other end of the second connecting pipe (405) is connected to the input end of the pump body (403). The output end of the pump body (403) is connected to an oil injection pipe (406).

2. The automatic oiling device for an electric motor according to claim 1, characterized in that, The filter device (402) is provided with a card plate (9) inside, and a card slot (10) is opened inside the filter device (402). The card plate (9) and the card slot (10) are used to hold the filter element (11).

3. The automatic oiling device for an electric motor according to claim 1, characterized in that, The bottom surface of the filter device (402) is connected to a drain pipe (7), and the outer walls of the first connecting pipe (404), the second connecting pipe (405) and the drain pipe (7) are respectively equipped with a first solenoid valve (5), a second solenoid valve (6) and a third solenoid valve (8).

4. The automatic oiling device for an electric motor according to claim 1, characterized in that, The filter device (402) is provided with a cover plate (12), and a pressing assembly (13) is installed on the bottom surface of the cover plate (12). The pressing assembly (13) includes a housing (1301) installed on the bottom surface of the cover plate (12), and a telescopic rod (1302) is installed inside the housing (1301).

5. The automatic oiling device for an electric motor according to claim 4, characterized in that, A spring (1303) is sleeved on the outer wall of the telescopic rod (1302), and a movable block (1304) is connected to the telescopic end of the telescopic rod (1302). A connecting rod (1305) and two sliders (1306) are installed on the outer wall of the movable block (1304).

6. The automatic oiling device for an electric motor according to claim 5, characterized in that, The interior of the outer casing (1301) is provided with a sliding groove (1307) that is adapted to the two sliders (1306), and a pressure block (1308) is installed at the bottom end of the connecting rod (1305). The cover plate (12) is internally threaded with multiple bolts (14).

7. An automatic oiling device for an electric motor according to claim 1, characterized in that, The bottom surface of the filter device (402) is equipped with four support legs (15), and the oil storage tank (401) is equipped with a level gauge (16).

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