JPH0373229B2 - - Google Patents

Description

[Detailed Description of the Invention] [Object of the Invention] (Industrial Application Field) The present invention relates to a bearing device for a rotating electric machine for a vehicle.
In particular, the present invention relates to a bearing device with an improved grease sealing plate.

(Prior Art) As shown in Fig. 1, a conventional bearing device has a rolling bearing 2 mounted on the inner diameter side of a bearing bracket 1, and a rotating shaft 3 inserted on the inner diameter side of this rolling bearing 2. The structure supports the Grease sealing plates 5, 5 each having an annular grease filling groove 4 are arranged on both axial sides of the bearing 2 so that the opening of the grease filling groove 4 faces the bearing 2 side. As shown in FIG. 2, a plurality of sectors 6 are provided in the grease filling groove 4 of the grease filling plate 5 in the radial direction, and the inside is partitioned into a plurality of grooves.

In the above bearing device, the filling groove 4 is filled with grease 7, and the bearing 2 is lubricated by the oil that oozes out. This ensures that the entire bearing is evenly lubricated.

(Problem to be solved by the invention) However, as the bearing size increases, filling grooves 4
As the groove width a of the opening increases, the grease 7 cracked due to solidification falls into the rolling elements of the bearing 2 as shown in Fig. 1, and is pushed back into the filling groove 4 by centrifugal force. . If this action is repeated many times, agitation of the grease 7 will be promoted and the temperature of the grease 7 will rise, which not only impairs the lubricating performance but also causes deterioration and emulsification of the grease 7.
In particular, in the case of a rotating electric machine for a vehicle, there is a drawback that the grease 7 is further accelerated to fall onto the rolling elements due to severe vibrations applied while the vehicle is running, and the lubricating performance of the grease 7 is significantly reduced.

The present invention eliminates such conventional drawbacks, prevents the grease from solidifying and dropping more than necessary into the rolling elements of the bearing due to vibration, stably retains the grease, and provides good lubrication properties. It is an object of the present invention to provide a bearing device for a rotating electric machine for a vehicle that can be maintained for a long time.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, the present invention includes a rolling bearing, and grease-filled plates arranged on both axial side surfaces of the rolling bearing, In a bearing device for a rotating electric machine for a vehicle, in which the grease filling plate has an annular grease filling groove, and the opening of the grease filling groove is formed to face the rolling bearing, a grease filling groove is formed on the bottom surface of the grease filling groove. The groove is characterized by being provided with a grease partition plate that divides the groove in the width direction and projects into the opening.

(Function) In the present invention configured as described above, the opening groove width of the grease filling groove is reduced, so that a large amount of grease in the grease filling groove enters the rolling element due to cracks due to solidification or vibrations during vehicle running. It is prevented from falling, the grease is stably held in the grease filling groove, and good lubrication properties are maintained for a long time.

(Example) An example of the present invention will be described below with reference to the drawings.

3 and 4 show an embodiment of the present invention, in which a rolling bearing 2 is installed inside a bearing bracket 1, and a rotating shaft 3 is further inserted and supported inside this rolling bearing 2. There is. Grease sealing plates 5, 5 each having an annular grease filling groove 4 are arranged on both axial sides of the bearing 2, with the opening of the grease filling groove 4 facing the bearing 2 side.

At the center of the bottom of the grease filling groove 4, a plurality of grease partition plates 8 having a T-shaped cross section and projecting toward the opening are provided at intervals.
This grease partition plate 8 divides the grease filling groove 4 in the groove width direction.

In the bearing device having the above structure, the groove width a at the opening of the grease filling groove 4 is partially reduced, and a large amount of the grease 7 may fall into the rolling elements of the bearing 2 due to cracking due to solidification of the grease 7 or vibration. can be prevented. Furthermore, since the grease partition plate 8 is formed to have a T-shaped cross section and is adapted to retain the grease 7, its holding effect can be further enhanced.

5 and 6 show other embodiments of the invention. In this embodiment, two annular grease partition plates 8a, 8a are concentrically arranged on the bottom surface of the grease filling groove 4 and protrude toward the opening side. The grease filling groove 4 is divided in the groove width direction by the grease partition plate 8a and formed into three concentric groove portions. As a result, the groove width a can be shortened to 1/3 compared to the conventional one, so grease 7
It is particularly suitable for large-sized bearing devices.

[Effects of the Invention] As explained above, according to the bearing device for a rotating electric machine for a vehicle according to the present invention, a large amount of grease is prevented from entering the rolling elements of the bearing due to cracks caused by solidification of the grease or vibrations while the vehicle is running. It is possible to prevent the grease from falling and to hold it stably, to prevent deterioration and emulsification of the grease due to the temperature rise caused by stirring the grease, and thereby to maintain good lubricating properties over a long period of time.

[Brief explanation of drawings]

Figure 1 is a vertical cross-sectional view showing a conventional bearing device;
The figure is a cross-sectional view taken along line A-A in Figure 1, Figure 3 is a longitudinal cross-sectional view of a bearing device showing an embodiment of the present invention, and Figure 4 is a cross-sectional view taken along line B-B in Figure 3. 5 is a longitudinal sectional view of a bearing device showing another embodiment of the present invention, and FIG. 6 is a sectional view taken along line CC in FIG. 5. 1...Bearing bracket, 2...Bearing, 3
... Rotating shaft, 4 ... Grease filling groove, 5 ... Grease filling plate, 6 ... Sector, 7 ... Grease,
8, 8a... Grease partition plate.

Claims (1)

[Claims] 1 It has a rolling bearing 2 and a grease filling plate 5 arranged on both axial side surfaces of the rolling bearing 2, and this grease filling plate 5 is provided with an annular grease filling groove 4 and further has an opening of the grease filling groove 4. In a bearing device for a rotating electric machine for a vehicle, which is formed so that a portion faces a rolling bearing 2, a grease partition plate is provided on the bottom surface of the grease filling groove 4 to divide the grease filling groove 4 in the groove width direction and protrude into an opening. 8,8
A bearing device for a rotating electric machine for a vehicle, characterized in that a bearing device is provided for a rotating electric machine for a vehicle.