Oil lubrication structure

Abstract

To provide an oil lubricating structure capable of sufficiently lubricating a bearing immediately after starting a vehicle.SOLUTION: An oil lubrication structure includes a bearing that rotatably supports a rotor shaft, an oil pump that circulates oil, a lubricating pipe that supplies the oil from the oil pump to the bearing, and an oil reservoir that is located between the lubricating pipe and the bearing and stores the oil.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present disclosure relates to oil-lubricated structures. [Background technology]

[0002] Patent Document 1 describes a lubrication structure for a motor in which oil dripping from an oil supply passage cools the coil ends of the motor and lubricates the bearings that support the rotating shaft of the motor. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2023-070244 Summary of the Invention [Problem to be solved by the invention]

[0004] However, immediately after starting a vehicle equipped with the motor lubrication system, the oil pump is not running, so bearing oil is not supplied. Also, since the bearings are located far from the oil pump, it takes time for the oil to reach them. As a result, the bearings may not be sufficiently lubricated immediately after starting the vehicle.

[0005] The present disclosure has been made in view of the above, and aims to provide an oil lubrication structure that can sufficiently lubricate bearings immediately after a vehicle is started. [Means for solving the problem]

[0006] The oil lubrication structure of the present disclosure comprises a bearing that rotatably supports a rotor shaft, an oil pump that circulates oil, a lubrication pipe that supplies the oil from the oil pump to the bearing, and an oil reservoir located between the lubrication pipe and the bearing and that stores the oil. [Effects of the Invention]

[0007] According to the present disclosure, it is possible to realize an oil lubrication structure that can sufficiently lubricate the bearings immediately after starting the vehicle. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram showing a schematic configuration of an oil lubrication structure according to the first embodiment. [Figure 2] FIG. 2 is a diagram showing a schematic configuration of an oil lubrication structure according to the second embodiment. [Figure 3] FIG. 3 is a cross-sectional view taken along line AA in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] The oil lubrication structure according to the embodiment of the present disclosure will be described with reference to the drawings. Note that the components in the following embodiments include those that are easily replaceable by those skilled in the art, or those that are substantially the same.

[0010] (Embodiment 1) [Configuration of oil lubrication structure] 1 is a diagram showing a schematic configuration of an oil lubrication structure according to embodiment 1. The oil lubrication structure 1 includes a rotor shaft 2, a bearing 3, an EOP (Electric Oil Pump) 4, a lubrication pipe 5, and an oil reservoir 6.

[0011] The oil lubrication structure 1 circulates oil O to lubricate various parts of a vehicle.

[0012] The rotor shaft 2 is connected to the rotor and rotates integrally with the rotor.

[0013] The bearing 3 supports the rotor shaft 2 so that it can rotate.

[0014] The EOP 4 circulates the oil O to each part of the vehicle using electric power. However, the oil lubrication structure 1 only needs to include an oil pump, and may include, for example, a mechanical oil pump.

[0015] The lubrication pipe 5 is an oil passage that supplies oil O from the EOP 4 to the bearing 3.

[0016] The oil reservoir 6 is located between the lubrication pipe 5 and the bearing 3 and stores the oil O. The oil reservoir 6 has, for example, a U-shaped groove. However, the shape of the oil reservoir 6 is not particularly limited as long as it is located between the lubrication pipe 5 and the bearing 3 and is configured to be able to store the oil O.

[0017] [Function of the oil reservoir] While a vehicle equipped with the oil lubrication structure 1 is running and oil O is being supplied from the EOP 4 to the bearing 3, oil O is also supplied to the groove of the oil reservoir 6. When the vehicle stops, oil O is stored in the groove of the oil reservoir 6. When the vehicle is started, the EOP 4 is not driven immediately after starting, so oil O is not supplied to the bearing 3. However, as the vehicle moves, acceleration causes the oil O stored in the groove of the oil reservoir 6 to overflow and fall, supplying oil O to the bearing 3. Furthermore, when the rotor shaft 2 rotates at high speed, negative pressure is generated, and the oil O stored in the groove of the oil reservoir 6 is sucked in, supplying oil O to the bearing 3. As a result, the oil lubrication structure 1 can sufficiently lubricate the bearing 3 immediately after starting the vehicle.

[0018] (Embodiment 2) [Configuration of oil lubrication structure] 2 is a diagram showing a schematic configuration of an oil lubrication structure according to embodiment 2. The oil lubrication structure 11 includes a rotor shaft 12, a bearing 13, an EOP 14, a lubrication pipe 15, and an oil reservoir 16. Descriptions of the same configuration as in embodiment 1 will be omitted where appropriate.

[0019] Fig. 3 is a cross-sectional view corresponding to line AA in Fig. 2. Oil reservoir 16 is C-shaped so as to cover the outer periphery of lubrication pipe 15. Oil O1 in lubrication pipe 15 drips into the lower part of oil reservoir 16, and oil O2 is stored therein.

[0020] [Function of the oil reservoir] While a vehicle equipped with oil lubrication structure 11 is running and oil O1 is being supplied from EOP 14 to bearing 13, oil O2 is also being supplied to oil reservoir 16. When the vehicle stops, oil O2 is stored in the lower part of oil reservoir 16. When the vehicle is started, oil O1 is not supplied to bearing 13 immediately after starting because EOP 14 is not driven. However, as the vehicle moves, acceleration causes oil O2 stored in oil reservoir 16 to overflow and drop, and oil O2 is supplied to bearing 13. As a result, oil lubrication structure 11 allows bearing 13 to be sufficiently lubricated immediately after the vehicle is started.

[0021] Further advantages and modifications will readily occur to those skilled in the art. Thus, the invention in its broader aspects is not limited to the specific details and representative embodiments shown and described above. Accordingly, various modifications may be made without departing from the spirit or scope of the general inventive concept as defined by the appended claims and their equivalents. [Explanation of symbols]

[0022] 1, 11 Oil lubrication structure 2, 12 rotor shaft 3, 13 Bearings 4, 14 EOP 5, 15 Lubrication pipe 6, 16 Oil reservoir

Claims

[Claim 1] a bearing that rotatably supports the rotor shaft; An oil pump that circulates oil; a lubrication pipe that supplies the oil from the oil pump to the bearing; an oil reservoir located between the lubrication pipe and the bearing and configured to store the oil; Oil lubrication structure.

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