JP4106923B2 - Lubricating structure for vehicle motor unit - Google Patents

Description

[0001]
BACKGROUND 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 relates to a lubricating structure for a vehicle motor unit that transmits the power of two motors using a common rotating shaft.
[0002]
[Prior art]
Conventionally, regarding the lubrication of parts such as motors and reduction gear bearings that serve as power sources for electric vehicles, the oil pumped up by the oil pump is supplied from the outer periphery of the motor shaft to the inside of the motor shaft. A technique for supplying oil to a bearing via the above has been known (for example, see Japanese Patent Application Laid-Open No. 11-190417).
[0003]
[Problems to be solved by the invention]
However, when oil is supplied from the outer periphery of the motor shaft to the inside of the motor shaft as in the prior art, a powerful centrifugal force is generated due to high-speed rotation of the electric vehicle motor (10000 rpm or more). There was a fear that oil could not be sufficiently supplied into the shaft.
[0004]
Then, an object of this invention is to provide the lubricating structure of the motor unit for vehicles which can solve said subject.
[0005]
[Means for Solving the Problems]
That is, the present invention includes a first motor, a second motor, said first said and the rotation shaft of the motor the second being arranged parallel to the rotation axis of the motor, before the first motor and the rotary shaft of the second motor And an output shaft that is provided below the first motor and the second motor and outputs the power of the first motor and the second motor via the intermediate shaft. A lubricating structure for a motor unit for a vehicle, which is connected to the hydraulic pressure source for pumping oil and the hydraulic pressure source, and is oriented in a direction orthogonal to the rotation shaft of the first motor, the rotation shaft of the second motor, and the intermediate shaft. A common oil passage to be arranged ; one end of the common oil passage is connected to a first oil passage provided in a rotation shaft of the first motor; the first oil passage is connected to the first oil passage; Oil can be supplied to the bearing that supports the rotating shaft of one motor 3 and the oil passage, the common oil channel and one end is connected, and a second oil passage provided inside the rotating shaft and the second motor is connected to the second oil passage, said second motor A fourth oil passage capable of supplying oil to a bearing portion bearing the rotary shaft; a fifth oil passage connected to one end of the common oil passage; and a fifth oil passage provided in the intermediate shaft; A sixth oil passage connected to the passage and capable of supplying oil to a bearing portion that supports the intermediate shaft .
[0006]
Further, in the present invention, the hydraulic source may be that the oil pump driven by the output shaft.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described through embodiments of the invention. However, the following embodiments do not limit the claimed invention, and all combinations of features described in the embodiments are the solution of the invention. It is not always essential to the means.
[0008]
1 is a front view of a vehicular electric unit 10 according to the embodiment, FIG. 2 is a cross-sectional view taken along line AA in FIG. 1, FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG.
[0009]
The vehicle electric unit 10 includes a first motor 20, a second motor 30, and a power transmission mechanism 50 that transmits the power of the first motor 20 and the second motor 30 to the wheels of the vehicle.
[0010]
The first motor 20 and the second motor 30 are accommodated in a motor case 40. The first motor shaft 22 of the first motor 20 is supported by bearing portions 24 and 26 provided in the first motor 20 and a motor bearing portion 42 provided in the motor case 40. Further, the second motor shaft 32 of the second motor 30 is supported by bearing portions 34 and 36 provided in the first motor 20 and a motor bearing portion 44 provided in the motor case 40.
[0011]
The power transmission mechanism 50 has 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 47 provided in the motor case 40.
[0012]
A first gear 28 is provided on the first motor shaft 22. The second motor shaft 32 is provided with a second gear 38. The first gear 28 and the second gear 38 mesh 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 meshes with a fifth gear 72 provided on the output shaft 70.
[0013]
As described above, the vehicular electric unit 10 according to the present embodiment is configured such that the output shaft 70 is rotated by the power of the first motor 20 and the second motor 30.
[0014]
Next, oil circulation in the vehicle electric unit 10 will be described.
[0015]
The oil accumulated in the strainer 90 is pumped up by the oil pump 100 that is driven by the driving force of the output shaft 70. The pumped oil is filtered by the oil filter 110 and then cooled by the oil cooler 120.
[0016]
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 passage 130 is connected to one end of oil passages 29, 39, and 69 formed in the first motor shaft 22, the second motor shaft 24, and the intermediate shaft 60, respectively. Oil is pumped to the paths 29, 39, 69.
[0017]
As described above, 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, and 69, so that the first motor shaft 22 and the second oil passage 22 respectively. Since it is not easily affected by the centrifugal force caused by the rotation of the motor shaft 32 and the intermediate shaft 60, oil can be reliably pumped from the oil passage 130 to the oil passage 29, the oil passage 39, and the oil passage 69.
[0018]
In addition, orifices 132, 134, and 136 are respectively provided at connection portions between the oil passages 29, 39, and 69 and the oil passage 130. By changing the diameters of the oil passages 29, 39, and 69, oil is supplied. The amount can be adjusted.
[0019]
The oil passages 29 are connected to oil passages 150, 152, 154 that can supply oil to the bearings 24, 26, 42, respectively. Oil can be reliably supplied to the portion, and the reliability of each bearing portion bearing the first motor shaft 22 can be improved.
[0020]
Similarly, oil passages 156, 158, and 160 that can supply oil to the bearings 34, 36, and 44 are connected to the oil passage 39, and the second motor shaft 32 rotates at a high speed. The oil can be reliably supplied to each bearing part, and the reliability of each bearing part bearing the second motor shaft 32 can be improved.
[0021]
The oil passages 69 are connected to oil passages 162 and 164 capable of supplying oil to the bearings 44 and 46, respectively. Even when the intermediate shaft 60 rotates at high speed, oil is supplied to the bearing portions. It can supply reliably and can improve the reliability of each bearing part which bears the intermediate shaft 60.
[0022]
The oil used for lubricating each bearing part returns to the strainer 90.
[0023]
In this way, by pumping oil from the end of each motor shaft and intermediate shaft into each shaft, even when a strong centrifugal force is generated due to the motor rotating at high speed, The oil can be reliably supplied to the motor and the bearing portion.
[0024]
As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. Various modifications or improvements can be added to the above embodiment. It is apparent from the description of the scope of claims that embodiments with such changes or improvements can be included in the technical scope of the present invention.
[0025]
【The invention's effect】
As is clear from the above description, according to the present invention, oil can be reliably supplied to a portion such as a bearing portion of a motor rotating at high speed.
[Brief description of the drawings]
FIG. 1 is a front view of a vehicle electric unit 10 according to an embodiment.
FIG. 2 is a cross-sectional view taken along the line AA of FIG.
3 is a cross-sectional view taken along the line BB in FIG.
4 is a cross-sectional view taken along the line CC of FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 Electric unit for vehicles, 20 1st motor, 22 1st motor shaft, 24,26,34,36,42,44,45,46,47 Bearing part, 28 1st gearwheel, 30 2nd motor, 32 2nd 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 Fifth gear, 90 Strainer, 100 Oil pump, 110 Oil filter , 120 Oil cooler.

Claims (2)

A first motor, a second motor, wherein arranged parallel to the axis of rotation of the the rotary shaft second motor of the first motor, and an intermediate shaft which rotates with the first motor by the rotation shaft of the second motor, A lubricating structure for a motor unit for a vehicle , comprising: an output shaft provided below the first motor and the second motor and outputting the power of the first motor and the second motor via the intermediate shaft. Because
A hydraulic source for pumping oil,
A common oil passage that is connected to the hydraulic source and arranged in a direction orthogonal to the rotation shaft of the first motor, the rotation shaft of the second motor, and the intermediate shaft;
A first oil passage that is connected to the common oil passage and one end, and is provided inside a rotation shaft of the first motor;
A third oil passage connected to the first oil passage and capable of supplying oil to a bearing portion bearing the rotating shaft of the first motor;
A second oil passage, which is connected to the common oil passage and one end, and is provided inside a rotation shaft of the second motor;
A fourth oil passage connected to the second oil passage and capable of supplying oil to a bearing portion bearing the rotation shaft of the second motor;
A fifth oil passage connected to the common oil passage and one end, and provided in the intermediate shaft;
A sixth oil passage connected to the fifth oil passage and capable of supplying oil to a bearing portion bearing the intermediate shaft;
A lubricating structure for a motor unit for a vehicle, comprising: 2. The lubricating structure for a vehicle motor unit according to claim 1, wherein the hydraulic pressure source is an oil pump driven by an output shaft .

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