CN209705250U - A water-cooled motor front bearing oil lubrication mechanism and motor drive assembly - Google Patents

Abstract

The utility model discloses a kind of water-cooled machine fore bearing oil lubrication mechanism and motor driven assembly, solve the bearing heating that existing water-cooled machine fore bearing is occurred using grease lubrication is serious, rouge easily flow out caused bearing damage and service life it is low the problems such as.The water-cooled machine fore bearing oil lubrication mechanism includes the gear splashing oil-bearing structure being arranged in gearbox or reduction gearbox, and the bearing baffle oil-bearing structure of water-cooled machine front end is arranged in；Gear in gearbox or reduction gearbox during operation gets rid of lubricating oil in gear splashing oil-bearing structure, and it is transported in bearing baffle oil-bearing structure by Oil Guide pipeline, to make water-cooled machine fore bearing be lubricated, then lubricating oil flows back in gearbox or reduction gearbox through oil returning tube.The lubricating oil to splash in gearbox or reduction gearbox is imported water-cooled machine fore bearing by the utility model reduces the reliability of the fever of water-cooled machine fore bearing, the service life for improving it and motor so that water-cooled machine fore bearing has also obtained oil lubrication.

Description

A water-cooled motor front bearing oil lubrication mechanism and motor drive assembly

technical field

The utility model relates to a lubricating oil conveying mechanism, in particular to a lubricating mechanism for the front bearing of a water-cooled motor. The utility model also relates to a motor drive assembly.

Background technique

At present, the lubrication methods of the front bearing of the motor are mainly divided into two categories. One is the oil lubrication used in oil-cooled motors. This type of lubrication requires an oil pump to complete the circulation of the oil circuit. The structure is complex and increases the manufacturing cost; the other is grease lubrication used in water-cooled motors. This type of lubrication The grease is easy to flow out, the bearing friction is large, the heat dissipation is poor, and the allowable speed is relatively low, which reduces the bearing life to a certain extent and cannot meet the high speed occasions.

With the continuous development of new energy vehicles, the motor needs to face more and more complex working conditions. The user's demand for the maximum speed, temperature rise and life of the motor is becoming more and more urgent. The motor using the traditional lubrication method can no longer meet the new requirements. The energy vehicle industry requires the development of vehicles with high power, high torque, maximum speed and maximum life.

Utility model content

Aiming at the above-mentioned problems in the prior art, the utility model provides a lubricating mechanism for the front bearing of the water-cooled motor, which guides the lubricating oil splashed in the gearbox or reduction box into the front bearing of the water-cooled motor, so that the front bearing of the water-cooled motor is also improved. Oil lubrication can effectively reduce the heat generation of the bearing, improve the service life of the front bearing of the water-cooled motor, and is suitable for high-speed operation conditions.

The utility model also provides a motor drive assembly, which is equipped with the above-mentioned front bearing oil lubrication mechanism of the water-cooled motor.

In order to achieve the above object, the technical solution of the utility model is achieved in that:

On the one hand, the utility model provides a front bearing oil lubrication mechanism of a water-cooled motor, including a gear splash oil storage structure arranged in a gearbox or a reduction box, and a bearing baffle oil storage structure arranged at the front end of a water-cooled motor, the gear splash The oil storage structure and the oil storage structure of the bearing baffle are communicated through an oil guide pipeline, and the oil storage structure of the bearing baffle is communicated with the gearbox or reduction box through an oil return pipeline; the gears in the gearbox or reduction box During operation, lubricating oil is thrown into the gear splash oil storage structure, and delivered to the bearing baffle oil storage structure through the oil guide pipe, so that the front bearing of the water-cooled motor is lubricated, and then the lubricating oil passes through The oil return line flows back into the gearbox or reduction box.

Optionally, the gear splash oil storage structure includes an oil storage tank arranged on the inner wall of the casing of the gearbox or reduction box. During the operation of the gears in the gearbox or reduction box, The lubricating oil contacted gearwheel at the bottom of the reduction box splashes the lubricating oil into the oil storage tank.

Optionally, the oil storage tank is cast or welded or bolted on the inner wall of the gearbox or the reduction box, and the casing of the transmission or the reduction box is provided with an oil nozzle connection place corresponding to the oil storage tank. The oil guide pipeline.

Optionally, the side wall of the oil storage tank receiving lubricating oil is arc-shaped.

Optionally, the bearing baffle oil storage structure includes a bearing seat arranged at the front end of the housing of the water-cooled motor, the front bearing of the water-cooled motor is arranged in the bearing seat, and the rear end of the bearing seat is provided with The bearing baffle half-closes the bearing seat, the front bearing of the water-cooled motor presses against the bearing baffle, and the lubricating oil stored at the bottom of the bearing seat lubricates the front bearing of the water-cooled motor.

There is a gap between the inner hole of the bearing baffle and the shaft of the water-cooled motor. Outflow from the seat and flow into the housing of the water-cooled motor.

Optionally, the housing of the water-cooled motor includes a front end cover, the bearing seat is disposed in the front end cover, and an oil inlet nozzle is provided on the front end cover corresponding to the bearing seat to connect to the oil guide pipe.

Optionally, the oil return pipeline is arranged in the inner wall of the casing at the lower part of the water-cooled motor, the inlet of the oil return pipeline is located inside the casing of the water-cooled motor, and the lubricating oil flows out from the bearing seat , and flow back into the gearbox or reduction box through the oil return pipeline, thereby forming a complete oil circuit.

Optionally, the oil guide pipe is arranged in the inner wall of the casing on the upper part of the water-cooled motor.

Optionally, an input oil channel is provided on the upper part of the bearing seat in the front end cover to communicate with the oil guide pipe.

Optionally, the rear end of the casing of the water-cooled motor is installed on the casing front cover of the gearbox or the reduction box, and the casing front cover of the gearbox or the reduction box is provided with an oil inlet nozzle to communicate with the return oil pipeline.

The lubricating oil liquid level in the gear splash oil storage structure is higher than the lubricating oil liquid level in the bearing baffle oil storage structure, and the lubricating oil is transported from the gear splash oil storage structure through the oil guide pipeline under the action of gravity to the oil storage structure of the bearing baffle.

Another aspect of the utility model provides a water-cooled motor drive assembly, which includes a water-cooled motor, a gearbox or a reduction box, and also includes the above-mentioned front bearing oil lubrication mechanism of the water-cooled motor.

The oil lubrication mechanism for the front bearing of the water-cooled motor set with the above structure has the following advantages:

The utility model is respectively provided with two oil storage structures in the water-cooled motor and the gearbox or the reduction box. To the second oil storage structure, the front bearing of the water-cooled motor is located in the second oil storage structure, and the front bearing of the water-cooled motor can be lubricated with oil, which effectively reduces the heat generation of the bearing and improves the service life of the front bearing of the water-cooled motor. It is suitable for high-speed operation. condition.

The front bearing of the water-cooled motor of the utility model is lubricated by oil (the rear bearing of the water-cooled motor is also lubricated by oil), which is suitable for high-speed rotation, has good high temperature stability, can play the role of cooling, and can easily remove wear particles and dust inside the bearing. Improve bearing life.

Description of drawings

Fig. 1 is a schematic structural view of a water-cooled motor drive assembly in an embodiment of the present invention;

Fig. 2 is a sectional view along A-A in Fig. 1;

Fig. 3 is an enlarged view of part I in Fig. 1 .

In the figure: 1. Front bearing of water-cooled motor; 2. Bearing baffle; 3. Oil return pipe; 4. Rotor; 5. Stator; 6. Housing of water-cooled motor; 7. Rear bearing of water-cooled motor; Body; 9. Oil guide pipe; 10. Oil storage tank; 11. Small gear; 12. Large gear.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present utility model clearer, the implementation of the present utility model will be further described in detail below in conjunction with the accompanying drawings.

The water-cooled motor involved in the embodiment of the utility model is shown in FIG. 1 , and includes components such as a rotor 4 , a stator 5 , and a water-cooled motor housing 6 . The rotor 4 is installed on the shaft, and the front and rear sections of the shaft are respectively fixed by the front bearing 1 of the water-cooled motor and the rear bearing 7 of the water-cooled motor. A cooling passage is arranged inside the water-cooled motor casing 6, and cooling liquid enters into the cooling passage to cool the motor.

In electric vehicles, a water-cooled motor is combined with a gearbox or reduction box to form a drive assembly for driving the vehicle.

Example 1

As shown in Fig. 1, Fig. 2 and Fig. 3, it is Embodiment 1 of the present utility model. In this embodiment, a bearing oil lubrication mechanism for a water-cooled motor is provided, including a gear splash oil storage structure arranged in a gearbox, and an oil storage structure arranged in a gearbox The oil storage structure of the bearing baffle at the front end of the water-cooled motor, the oil storage structure of the gear splash and the oil storage structure of the bearing baffle are connected through the oil guide pipe 9, and the oil storage structure of the bearing baffle and the gearbox are connected through the oil return pipe 3; The gears in the gearbox throw lubricating oil into the gear splash oil storage structure during operation, and transport it to the oil storage structure of the bearing baffle through the oil guide pipe 9, so that the front bearing 1 of the water-cooled motor is lubricated, and then the lubricating oil It flows back into the gearbox through the oil return pipeline 3.

Since transmission teeth are arranged on the peripheral surface of the gear, when the gear passes through the lubricating oil, the transmission teeth will inevitably bring up a small amount of lubricating oil. As the gear rotates, the lubricating oil will be thrown up along the rotation direction of the gear, It can be said that the inside of the gearbox is in a state of splashing lubricating oil.

Specifically, the gear splash oil storage structure includes an oil storage tank 10 arranged on the inner wall of the gearbox housing 8. During the operation of the gears in the gearbox, the large gear 12 that contacts the lubricating oil at the bottom of the gearbox throws the lubricating oil into the storage tank. In the oil tank 10.

There are multiple gears in the actual gearbox to form multiple transmission ratios. The diameters of these gears are different. Some small gears cannot touch the lubricating oil stored at the bottom of the gearbox because of their small diameters. Bring up the lubricating oil, such as the pinion 11, so you need to rely on a large gear with a larger diameter, such as the big gear 12, to pick up the lubricating oil during operation. There may also be multiple large gears that can touch the lubricating oil at the bottom of the gearbox, so that the amount of lubricating oil brought up is relatively sufficient. At least one large gear that can contact the lubricating oil at the bottom of the gearbox is sufficient.

As shown in FIG. 2 , the oil storage tank 10 is fixed on the inner wall of the gearbox housing 8 , and the gearbox housing 8 is provided with an oil outlet nozzle connected to the oil guide pipe 9 corresponding to the oil storage tank 10 . The oil outlet here communicates with the oil storage tank 10 internally, and the oil outlet can be threaded and fixed, or welded and fixed on the gearbox housing 8 .

In order to receive the flung lubricating oil conveniently, the side wall of the lubricating oil receiving side of the oil storage tank 10 is arc-shaped, which enlarges the entrance area of the oil storage tank 10 . The curvature of the side wall can be designed with reference to the curvature of the inner wall of the gearbox housing 8 .

The side wall of the oil storage tank 10 that accepts the lubricating oil side can also be designed into other shapes, as long as it is convenient to accept the lubricating oil, it is convenient to preserve the lubricating oil thrown in.

The oil storage tank 10 can be cast on the inner wall of the gearbox casing 8, or be stamped from sheet metal or plastic injection molding, and then be welded or bolted on the inner wall of the middle part of the gearbox.

As shown in Figure 1, the bearing baffle oil storage structure includes a bearing seat arranged at the front end of the water-cooled motor casing 6, the front bearing 1 of the water-cooled motor is arranged in the bearing seat, and the rear end of the bearing seat is provided with a bearing baffle 2 which is semi-closed In the bearing housing, the front bearing 1 of the water-cooled motor is pressed against the bearing baffle plate 2, and the lubricating oil stored at the bottom of the bearing housing lubricates the front bearing 1 of the water-cooled motor.

As shown in Figures 1 and 3, there is a gap between the inner hole of the bearing baffle 2 and the shaft of the water-cooled motor. Flow out from the bearing seat and flow into the water-cooled motor housing 6 inside. The front bearing 1 of the water-cooled motor will not block the lubricating oil.

Since the cables such as the stator winding and the rotor winding inside the water-cooled motor are insulated, the lubricating oil can flow into the water-cooled motor housing 6 and then flow back to the gearbox through the oil return pipe 3 .

Bearing baffle 2 can be threadedly installed and fixed on the rear end of the bearing seat, and the threaded joint needs to be sealed to prevent lubricating oil from leaking from the threaded joint, so that the lubricating oil stored at the bottom of the bearing seat can maintain a certain oil level.

The water-cooled motor housing 6 includes a front end cover, and a bearing seat is arranged in the front end cover, and an oil inlet nozzle is arranged on the front end cover corresponding to the bearing seat to connect with an oil guide pipe 9 . Here, the oil inlet nozzle communicates with the bearing seat inwardly, and the oil inlet nozzle can be screwed and fixed, or welded and fixed on the water-cooled motor housing 6 .

The front end of the bearing seat does not penetrate the front end cover, so it is closed. An oil inlet nozzle can be set here, and the front end of the bearing seat can also penetrate the front end cover, and then a cover is set to seal it to ensure that the lubricating oil will not flow from the front end of the bearing seat. leakage.

In this embodiment, the oil return pipeline 3 is arranged in the inner wall of the casing at the lower part of the water-cooled motor, and the inlet of the oil return pipeline 3 is located inside the water-cooled motor casing 6. Back to the gearbox to form a complete oil circuit.

The liquid level of the lubricating oil stored at the bottom of the gearbox is lower than the oil return pipeline 3, so that the lubricating oil in the oil return pipeline 3 can flow back into the gearbox smoothly.

The inside of the water-cooled motor casing 6 is provided with a cooling channel, so the water-cooled motor casing 6 has a certain wall thickness, and the oil return pipeline 3 can be arranged by using this wall thickness.

In this embodiment, the oil guide pipeline 9 is a separate pipeline, as shown in Figure 1, the upper end of the oil guide pipeline 9 is connected to the oil outlet nozzle on the gearbox housing 8, and the lower end is connected to the oil inlet nozzle on the water-cooled motor housing 6 . The oil guide pipeline 9 can adopt a metal hard pipe or a metal hose, and the upper end and the lower end are all provided with pipe joints.

The rear end of the water-cooled motor housing 6 is installed on the front end cover of the gearbox housing 8 , and an oil inlet nozzle is arranged on the front cover of the gearbox housing to communicate with the oil return pipeline 3 . Here, the oil inlet nozzle communicates with the interior of the gearbox housing 8, and the lubricating oil enters the interior of the gearbox housing 8 and is stored at the bottom of the gearbox housing 8, and continues to be carried by the gear wheel 12 to form a lubricating oil circulation path.

As can be seen from Figure 1, the rear end of the shaft of the water-cooled motor is also provided with a water-cooled motor rear bearing 7, which is located in the gearbox housing 8. Since the inside of the gearbox is in a state of splashing lubricating oil, the water-cooled motor The rear bearing 7 can be lubricated by lubricating oil in the gearbox.

As shown in Figure 2, the lubricating oil liquid level in the gear splash oil storage structure is higher than the lubricating oil liquid level in the bearing baffle oil storage structure, and the lubricating oil is transported from the gear splash oil storage structure through the oil guide pipe 9 to the Bearing baffle oil storage structure.

The gearbox in this embodiment can also be a reduction gearbox. The function of the reduction gearbox is different from that of the gearbox. The reduction gearbox is only used for deceleration. The gear splash oil storage structure is set in the same structure in the gearbox and the reduction gearbox. The description will not be repeated here.

The front bearing 1 of the water-cooled motor and the rear bearing 7 of the water-cooled motor in this embodiment are all lubricated with oil, which is suitable for high-speed rotation, has good high temperature stability, can play the role of cooling, and can easily remove wear particles and dust inside the bearing, improving bearing life.

Example 2

In this embodiment, the difference from Embodiment 1 is that the oil guide pipe is arranged in the inner wall of the casing on the upper part of the water-cooled motor. The inside of the casing of the water-cooled motor is provided with cooling passages, so the casing of the water-cooled motor has a certain wall thickness, which can be used to install the oil guide pipe.

Correspondingly, in the front end cover of the water-cooled motor housing 6, an oil input passage communicated with an oil guide pipe is arranged on the upper part of the bearing seat.

The input oil channel in the front end cover can be up and down vertical direction, after the front end cover is installed, the input oil channel promptly realizes communicating with oil return pipeline 3.

In order to be able to communicate with the oil storage tank 10 inside the gearbox or reduction box, to ensure that the lubricating oil liquid level in the gear splash oil storage structure is higher than the lubricating oil liquid level in the bearing baffle oil storage structure, the oil guide pipe needs to be lifted upwards at the rear end, Therefore, an upward protrusion is provided at least at the rear end of the water-cooled motor housing 6 , and the oil guide pipe is arranged along the protrusion to communicate with the oil storage tank 10 .

In this embodiment, other structures of the oil lubrication mechanism for the front bearing of the water-cooled motor are the same as those in Embodiment 1, and will not be described again here.

Example 3

In this embodiment, a water-cooled motor drive assembly is provided, which includes a water-cooled motor and a gearbox or reduction box, and also includes the oil lubrication mechanism for the front bearing of the water-cooled motor described in Embodiment 1 or Embodiment 2.

Take the gearbox as an example, as shown in Figure 1, the water-cooled motor and the gearbox are combined together, the water-cooled motor may not be provided with a rear end cover, the rear end of the water-cooled motor housing 6 is installed on the front end cover of the gearbox housing 8, and the water-cooled motor The shaft of the motor is integrated with the input shaft of the gearbox, which can reduce the axial width of the water-cooled motor drive assembly

The function of the gearbox is different from that of the gearbox. The gearbox is only used for deceleration. The combined structure of the gearbox and the water-cooled motor can refer to the combined structure of the gearbox and the water-cooled motor mentioned above.

The above are only specific embodiments of the present utility model. Under the above-mentioned teaching of the present utility model, those skilled in the art can make other improvements or deformations on the basis of the above-mentioned embodiments. Those skilled in the art should understand that the above specific description is only to better explain the purpose of the utility model, and the protection scope of the utility model should be based on the protection scope of the claims.

Claims (10)

1. A front bearing oil lubrication mechanism of a water-cooled motor, characterized in that it comprises a gear splash oil storage structure arranged in a gearbox or a reduction box, and a bearing baffle oil storage structure arranged at the front end of a water-cooled motor, the gear splash The oil storage structure and the oil storage structure of the bearing baffle are communicated through an oil guide pipeline, and the oil storage structure of the bearing baffle is communicated with the gearbox or reduction box through an oil return pipeline; the gears in the gearbox or reduction box During operation, lubricating oil is thrown into the gear splash oil storage structure, and delivered to the bearing baffle oil storage structure through the oil guide pipe, so that the front bearing of the water-cooled motor is lubricated, and then the lubricating oil passes through The oil return line flows back into the gearbox or reduction box. 2. The oil lubricating mechanism for the front bearing of the water-cooled motor according to claim 1, wherein the gear splash oil storage structure includes an oil storage tank arranged on the inner wall of the casing of the gearbox or reduction box, and the transmission During the operation of the gears in the gearbox or reduction box, the large gear in contact with the lubricating oil at the bottom of the gearbox or reduction box will splash the lubricating oil into the oil storage tank. 3. The oil lubricating mechanism for the front bearing of the water-cooled motor according to claim 2, wherein the oil storage tank is cast or welded or bolted on the housing inner wall of the gearbox or reduction box, and the gearbox or The casing of the reduction box is provided with an oil nozzle corresponding to the oil storage tank to connect to the oil guide pipe; The side wall of the oil storage tank receiving lubricating oil is arc-shaped. 4. The oil lubrication mechanism for the front bearing of the water-cooled motor according to claim 1, wherein the oil storage structure of the bearing baffle includes a bearing seat arranged at the front end of the housing of the water-cooled motor, and the front bearing of the water-cooled motor Set in the bearing seat, the rear end of the bearing seat is provided with a bearing baffle to half-close the bearing seat, the front bearing of the water-cooled motor presses against the bearing baffle, and is stored at the bottom of the bearing seat Lubricating oil lubricates the front bearing of the water-cooled motor; There is a gap between the inner hole of the bearing baffle and the shaft of the water-cooled motor. Outflow from the seat and flow into the housing of the water-cooled motor. 5. The oil lubrication mechanism for the front bearing of the water-cooled motor according to claim 4, wherein the housing of the water-cooled motor comprises a front end cover, the bearing seat is arranged in the front end cover, and the corresponding front end cover The bearing seat is provided with an oil inlet nozzle connected to the oil guide pipe. 6. The oil lubrication mechanism for the front bearing of the water-cooled motor according to claim 4, wherein the oil return pipeline is arranged in the inner wall of the lower part of the water-cooled motor, and the inlet of the oil return pipeline is located in the water-cooled motor. Inside the housing of the motor, the lubricating oil flows out from the bearing seat, and flows back into the gearbox or reduction box through the oil return pipe, thereby forming a complete oil circuit. 7. The front bearing oil lubrication mechanism of the water-cooled motor according to claim 4, characterized in that, the oil guide pipe is arranged in the inner wall of the casing on the upper part of the water-cooled motor; An input oil passage is provided on the upper part of the bearing seat in the front end cover to communicate with the oil guide pipe. 8. The oil lubricating mechanism for the front bearing of the water-cooled motor according to claim 1, wherein the housing rear end of the water-cooled motor is installed on the housing front end cover of the gearbox or reduction box, and the gearbox Or the front end cover of the housing of the reduction box is provided with an oil inlet nozzle to communicate with the oil return pipeline. 9. The front bearing oil lubrication mechanism of the water-cooled motor according to claim 1, wherein the lubricating oil liquid level in the gear splash oil storage structure is higher than the lubricating oil liquid level in the bearing baffle oil storage structure, and the lubrication Under the action of gravity, the oil is transported from the gear splash oil storage structure through the oil guide pipeline to the bearing baffle oil storage structure. 10. A motor drive assembly, comprising a water-cooled motor and a gearbox or reduction box, characterized in that it also includes the oil lubrication mechanism for the front bearing of the water-cooled motor according to any one of claims 1-9.