JP2003247628A - Lubricating structure for motor unit for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve the problem of oil which is not sufficiently provided into a shaft because the strong centrifugal force is generated with the high-speed rotation (10000 rpm or more) of a motor for an electric automobile. <P>SOLUTION: Oil pumped up by an oil pump is fed by pressure from one end of an oil passage 29 formed in a first motor shaft 22, an oil passage 39 formed in a second motor shaft 32, and an oil passage 69 formed in an intermediate shaft 60 through an oil passage 130. These oil passages 29, 39 and 69 are connected to an oil passage for supplying the oil to each bearing part of the first motor shaft 22, the second motor shaft 32 and the intermediate shaft 66, and the oil is securely provided to each bearing part. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for lubricating a bearing portion of a vehicle motor unit. In particular, the present invention is
The present invention relates to a lubricating structure for a vehicle motor unit that transmits the power of two motors using a common rotating shaft.

[0002]

2. Description of the Related Art Conventionally, regarding the lubrication of parts such as a motor and a speed reducer bearing which are power sources of an electric vehicle, oil pumped by an oil pump is supplied from the outer circumference of the motor shaft to the inside of the motor shaft. A technique for supplying oil to a bearing via the inside of a shaft of a motor has been known (for example, JP-A-11-190417).
(See Japanese Patent Publication).

[0003]

However, when it is attempted to supply oil from the outer circumference of the motor shaft to the inside of the motor shaft as in the prior art, the speed of the electric vehicle motor is increased (10,000 rpm or more), which is very strong. There is a possibility that sufficient oil may not be supplied to the inside of the shaft due to the generation of such a centrifugal force.

Therefore, an object of the present invention is to provide a lubricating structure for a motor unit for a vehicle which can solve the above problems.

[0005]

That is, the present invention provides a first motor, a second motor, the first motor and the second motor.
A power transmission mechanism that transmits the power of the motor to the wheels of the vehicle,
A vehicle motor unit lubrication structure including: a first hydraulic pressure source for pumping oil, a first hydraulic pressure source having one end connected to the hydraulic pressure source and provided inside a rotary shaft of the first motor.
An oil passage, a third oil passage that is connected to the first oil passage, and is capable of supplying oil to a bearing portion that bears the rotation shaft of the first motor, and the hydraulic power source and one end portion are connected, A second oil passage provided inside the rotation shaft of the second motor; and a fourth oil passage connected to the second oil passage and capable of supplying oil to a bearing portion for bearing the rotation shaft of the second motor; Equipped with.

Further, according to the present invention, oil amount adjusting means may be provided at the ends of the second oil passage and the third oil passage which are connected to the first oil passage.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the claimed invention, and the features described in the embodiments Not all combinations are essential to the solution of the invention.

FIG. 1 is a front view of a vehicle electric unit 10 according to an embodiment, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is FIG.
4 is a sectional view taken along line BB in FIG. 4, and FIG.

The vehicle electric unit 10 includes a first motor 2
0, the second motor 30, and the power transmission mechanism 5 that transmits the power of the first motor 20 and the second motor 30 to the wheels of the vehicle.
0 and.

The first motor 20 and the second motor 30 are
It is housed in the motor case 40. The first motor shaft 22 of the first motor 20 is supported by bearing portions 24, 26 provided in the first motor 20 and a motor bearing portion 42 provided in the motor case 40. The second motor shaft 32 of the second motor 30 is supported by bearings 34, 36 provided on the first motor 20 and a motor bearing 44 provided on the motor case 40.

The power transmission mechanism 50 is an intermediate shaft 60 that is rotated by the power of the first motor 20 and the second motor 30.
And an output shaft 70 that is rotated by the rotation of the intermediate shaft 60. The intermediate shaft is supported by motor bearing portions 45 and 46 provided in the motor case 40. Further, one end of the output shaft is supported by a motor bearing portion 47 provided in the motor case 40.

A first gear 28 is provided on the first motor shaft 22. A second gear 38 is provided on the second motor shaft 32. First gear 28 and second gear 3
8 meshes with a third gear 62 provided on the intermediate shaft 60. Further, the intermediate shaft 60 is provided with a fourth gear 64, and the fourth gear 64 is a fifth gear provided on the output shaft 70.
It meshes with the gear 72.

As described above, the vehicle electric unit 10 according to the present embodiment includes the first motor 20 and the second motor 30.
The output shaft 70 is rotated by the power of.

Next, the circulation of oil in the vehicle electric unit 10 will be described.

The oil accumulated in the strainer 90 is pumped up by the oil pump 100 driven by the driving force of the output shaft 70. The pumped oil is filtered by the oil filter 110, and then the oil cooler 1
It is cooled by 20.

The oil cooler 120 is connected to the oil passage 130, and the oil cooled by the oil cooler 120 is supplied to the oil passage 130. The oil passages 130 are each the first
It is connected to one end of the oil passages 29, 39, 69 formed inside the motor shaft 22, the second motor shaft 24, and the intermediate shaft 60. Is pumped.

As described above, since the oil passage 130, the oil passage 29, the oil passage 39, and the oil passage 69 are connected to one end of the oil passages 29, 39, 69, respectively, the first motor shaft 22. , The second motor shaft 32 and the intermediate shaft 60 are less likely to be affected by the centrifugal force caused by the rotation of the intermediate shaft 60.
Also, the oil can be reliably pressure-fed to the oil passage 69.

The orifices 132, 134, 1 are provided at the connecting portions of the oil passages 29, 39, 69 and the oil passage 130, respectively.
36 is provided, and the amount of oil can be adjusted by changing the diameters of the oil passages 29, 39, and 69, respectively.

Oil passages 150, 152, 154 capable of supplying oil to the bearings 24, 26, 42, respectively, are connected to the oil passage 29, and even when the first motor shaft 22 is rotating at a high speed. The oil can be reliably supplied to each bearing portion, and the reliability of each bearing portion bearing the first motor shaft 22 can be improved.

Similarly, the oil passage 39 has bearings 34 and 3 respectively.
Oil paths 156, 158, 16 capable of supplying oil to 6,44
0 is connected, oil can be reliably supplied to each bearing portion even when the second motor shaft 32 is rotating at a high speed, and the reliability of each bearing portion bearing the second motor shaft 32 can be improved. You can improve your sex.

The oil passage 69 has bearings 44, 46, respectively.
The oil passages 162 and 164 capable of supplying oil are connected to the intermediate shaft 60. Even when the intermediate shaft 60 is rotating at high speed, oil can be reliably supplied to each bearing portion.
It is possible to improve the reliability of each bearing portion that receives 0.

The oil used to lubricate each bearing portion is
Return to strainer 90.

As described above, by pumping the oil from the ends of the motor shafts and the intermediate shaft into the shafts, the shafts are reliably rotated even when a large centrifugal force is generated by the high speed rotation of the motors. The oil can be pumped inside, and the oil can be reliably supplied to the motor and the bearing.

Although the present invention has been described using the embodiments, the technical scope of the present invention is not limited to the scope described in the above embodiments. Various changes or improvements can be added to the above-described embodiment. A mode in which such changes or improvements are added may be included in the technical scope of the present invention.
It is clear from the description of the claims.

[0025]

As is apparent from the above description, according to the present invention, it is possible to reliably supply oil to a portion such as a bearing portion of a motor that rotates at high speed.

[Brief description of drawings]

FIG. 1 is a front view of a vehicle electric unit 10 according to an embodiment.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a sectional view taken along line BB of FIG.

FIG. 4 is a sectional view taken along line CC of FIG.

[Explanation of symbols]

10 Vehicle Electric Unit, 20 First Motor, 22
First motor shaft, 24, 26, 34, 36, 42, 44, 45,
46,47 bearing portion, 28 first gear, 30 second motor, 32 second motor shaft, 38 second gear, 40 motor case, 50 power transmission mechanism, 60 intermediate shaft, 62 third gear, 64 fourth gear, 70 output shaft, 72 5th gear, 90 strainer, 100 oil pump, 110
Oil filter, 120 oil cooler.

   ─────────────────────────────────────────────────── ─── Continued front page    (72) Inventor Masato Arimoto             1 Toyota Town, Toyota City, Aichi Prefecture Toyota Auto             Car Co., Ltd. (72) Inventor Yozo Mitsumori             3-1, Hinodai, Hino City, Tokyo 1 Hino             Inside the automobile corporation (72) Inventor Masao Kojima             3-1, Hinodai, Hino City, Tokyo 1 Hino             Inside the automobile corporation F term (reference) 3J063 AA01 AB02 AC01 BA11 CA01                       CB13 CD02 CD06 CD42 XD03                       XD23 XD34 XD43 XD62 XD73                       XE12                 5H605 BB05 CC04 CC05 EB10 EB24                       EB28 EB38                 5H607 AA12 BB01 BB14 CC03 CC05                       DD07 DD19 EE36 EE60 FF24                       GG08

Claims (2)

[Claims] 1. A first motor, a second motor, and the first motor.
A lubrication structure for a motor unit for a vehicle, comprising: a motor and a power transmission mechanism for transmitting the power of the second motor to wheels of a vehicle, wherein a hydraulic pressure source for pumping oil, and the hydraulic pressure source and one end are A third oil passage connected to the first oil passage provided inside the rotation shaft of the first motor, and a third oil passage connected to the first oil passage and capable of supplying oil to a bearing portion for bearing the rotation shaft of the first motor. An oil passage, a second end connected to the oil pressure source, and a second oil passage provided inside the rotation shaft of the second motor, and a second oil passage connected to the rotation shaft of the second motor. A lubricating structure for a vehicle motor unit, comprising: a fourth oil passage capable of supplying oil to a bearing portion for bearing the oil. 2. The oil amount adjusting means is provided at each of end portions of the second oil passage and the third oil passage that are connected to the first oil passage. Lubrication structure for vehicle motor units.