JPS6140581B2 - - Google Patents

Description

Detailed Description of the Invention The present invention relates to a rolling bearing device for an axle of a rotating electrical machine for a vehicle, and more particularly to a rolling bearing device for an axle of a rotating electrical machine for a vehicle that has an improved structure for fixing the axle to a stator frame of the rotating electrical machine. related.

Generally, a so-called hook-type rotating electrical machine is adopted as a rotating electrical machine for a vehicle, in which the rotating electrical machine is supported by an axle having wheels at both ends, since it can make maximum use of a narrow space.

This hanging type rotating electric machine is constructed as shown in FIGS. 1 to 4. The rotating electrical machine 1 has a rotating shaft 2 at its center to constitute a rotor, and a stator 3 is disposed around its outer periphery, which is supported by a stator frame 4. On the other hand, the axle 5 is arranged parallel to the rotating shaft 2, and has rolling bearings 6A, 6 at positions separated by a predetermined distance.
B is fitted. The outer peripheries of these rolling bearings 6A, 6B are supported by annular support portions 8A, 8B formed at the ends of the bearing housing 7, respectively. The bearing housing 7 has an annular shape at both ends (FIG. 4), and a central portion having a substantially semicircular cross section (FIG. 2). Further, the rolling bearing 6B on one side is supported by the annular support portion 8B via the intermediate ring 9. Bearing covers 10A and 10B are attached to the annular support portion 8A and the intermediate ring 9 to cover the sides of the rolling bearings 6A and 6B. When mounting the rotating electrical machine 1 on the axle 5 configured in this way, a mounting base 11 is attached to a part of the rotating electrical machine stator frame 4.
The central portion of the bearing housing 7 is fixed to this mounting table 11 with a fixing member 12 such as a bolt. Of course, the rotating shaft 2 and the axle 5 are the reduction gear device 1.
They are connected via 3. Wheels 14A and 14B are fixed on the axle 5 extending outward from the speed reducer 13 and the annular support portion 8B.

In the hook-type rotating electric machine configured in this way,
When inspecting the rolling bearings 6A, 6B on the axle 5, first remove the wheels 14A, 14B, gear device 13, and bearing housing 7 from the axle 5, and then remove the bearing housing 7 and the rolling bearings. 6A, 6
B must be moved axially on the axle 5 and then disassembled. This is because there are annular supports 8A and 8B at both ends of the bearing housing 7 that hold the rolling bearings, and the axle 5 of the bearing housing 7
This is because attachment and detachment from the axle must be performed from the axle end.

The present invention has been made in view of the above points, and an object thereof is to provide a rolling bearing device for an axle of a rotating electrical machine for a vehicle that is easy to maintain and inspect.

In order to achieve the above object, the present invention fits an intermediate annular housing around the outer periphery of each rolling bearing on an axle, and connects the intermediate annular housing to a rotary electric machine stator frame and a bearing housing having an approximately semicircular cross section. It is designed to be held in place.

An embodiment of the present invention will be described below with reference to FIGS. 5 to 7. As shown in the figure, in this embodiment, the axle 5
Rolling bearing 6 fitted at a predetermined distance apart from above
Intermediate annular housings 15 are provided on the outer peripheries of A and 6B, respectively.
A and 15B are fitted. These intermediate annular housings 15A and 15B have cover portions 16A and 16B that cover the side surfaces of the rolling bearing and approach the axle 5 on the opposing sides thereof, and cover portions 16A and 16B that approach the axle 5 on the opposite side thereof. Bearing cover 17 covering the side surface
A and 17B are respectively attached to hold grease around each rolling bearing.

On the other hand, this intermediate annular housing 15A, 15B
Fitting grooves 18A and 18B are provided in the mounting base 11 of the rotary electric machine stator frame, which faces the rotary electric machine stator frame, respectively.

The bearing housing 7 is formed to have a substantially semicircular cross section spanning the intermediate annular housings 15A and 15B, and fixing grooves 19A and 19B into which the intermediate annular housings are fitted are provided at both ends of the bearing housing 7, respectively. . These fixing grooves 19A, 19B and fitting grooves 18A, 18B substantially cover the outer circumferences of the intermediate annular housings 15A, 15B, and by fixing the bearing housing 7 to the mounting base 11, the axle 5 can be rotated. Instead of a fixed electric machine, a rotating electric machine can be mounted on the axle 5. Bearing housing 7
As shown in FIGS. 5 and 7, flanges 7F and 11F are provided on the facing parts of the bearing housing 7 and the mounting base 11, respectively, and the flange portions 5 are secured to the mounting base 11 by bolts. This is done by tightening bolts 20 and 21. The tightening force of the bolts 20, 21 becomes a force for fixing the intermediate annular housings 15A, 15B on the mounting table 11.

In this way, the intermediate annular housings 15A, 15B
can be sufficiently fixed to the mounting base 11 on the rotary electric machine stator frame, so that the axle 5 supported within the intermediate annular housings 15A, 15B via rolling bearings 6A, 6B can also be sufficiently supported. becomes.

In such a configuration, the rolling bearings 6A,
6B can be easily maintained and inspected by removing the plurality of bolts 20, 21. That is, by removing the bolts 20 and 21, the bearing housing 7, which has a substantially semicircular cross section, is separated from the mounting base 11 as shown by the two-dot chain line in FIG. Then, both intermediate annular housings 15A,
The axle 5 appears between the intermediate annular housings 15A and 15B, and if the rotating electric machine is separated from the axle 5 in this state, the gear gear 13 is also separated, and at the same time the intermediate annular housings 15A, 15B are separated.
are separated from the fitting grooves 18A and 18B of the mounting base 11. Next, by removing the bearing covers 17A, 17B and moving the intermediate annular housings 15A, 15B toward the center, the inner and outer rings of the rolling bearings 6A, 6B are separated, allowing sufficient maintenance and inspection of the rolling bearings.

For this reason, it is no longer necessary to remove the axles 14A, 14B on the axle 5 and the gears, and the rolling bearings 6A, 6B, which have not been sufficiently inspected in the past, can be adequately maintained.

In addition, the conventional rolling bearing device for an axle has a structure in which the rolling bearings 6A and 6B are supported at both ends of the bearing housing 7, and the central part of the bearing housing 7 is attached to the mounting stand 11. Both ends of the bearing housing 7, which overhangs the bearing housing 7, must bear severe loads such as the weight of the rotating electric machine while the vehicle is running, and the bearing housing 7 has to be made larger in order to ensure mechanical strength. However, according to the embodiment of the present invention, the rolling bearings 6A and 6B that support the axle 5 are fixed at their outer peripheries to the mounting base 11, although through the intermediate annular housings 15A and 15B. The load applied to the bearing housing 7 is reduced, and the thickness of the central portion of the bearing housing 7 can therefore be reduced.

As explained above, the present invention involves fitting an intermediate annular housing to the outer periphery of each rolling bearing fitted to an axle, and attaching the intermediate annular housing to a rotating electric machine stator frame with a bearing housing having a substantially semicircular cross section. Since the rolling bearing is clamped between the wheels, maintenance and inspection of the rolling bearing can be easily performed by simply removing the bearing housing without removing the wheels or gears fitted onto the axle.

[Brief explanation of the drawing]

Fig. 1 is a plan view showing an outline of a conventional hook-type rotating electric machine, Fig. 2 is a cross-sectional view along the line shown in Fig. 1, and Fig. 3 is a cross-sectional plan view of the area around the axle rolling bearing in Fig. 1. , FIG. 4 is an enlarged sectional view taken along the line of FIG. 1, FIG. 5 is a schematic plan view showing the surroundings of the rolling bearing for an axle according to the present invention, FIG. The figure is an enlarged sectional view taken along the line of FIG. 5... Axle, 6A, 6B... Rolling bearing, 7...
Bearing housing, 11...Mounting stand, 15A, 1
5B...Intermediate annular housing.

Claims (1)

[Claims] 1. An axle disposed parallel to the rotating shaft of a rotating electric machine for a vehicle, two rolling bearings fitted at a predetermined distance in the longitudinal direction of the axle, and these two rolling bearings. A rotating electric machine for a vehicle, comprising an intermediate annular housing fitted around the outer periphery of a rolling bearing, and a bearing housing having a substantially semicircular cross section and sandwiching the intermediate annular housing on a stator frame of the rotating electric machine. rolling bearing device for axles. 2. The axle roller of a rotating electrical machine for a vehicle as set forth in claim 1, characterized in that a grease filling chamber covering a side surface of the rolling bearing is provided on opposing sides of the two intermediate annular housings. dynamic bearing device.