JPS5926777Y2 - rotating electric machine - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a rotating electric machine, and particularly to an improvement in a rotating electric machine having a structure that allows easy disassembly and assembly.

FIG. 1 is a longitudinal sectional side view of a conventional motor generator for a vehicle, in which a frame 3 of the motor generator is suspended below a vehicle body 1 via a vibration isolating rubber 2 by a mounting arm 3a. (・ru.

A stator 3b is fixed to the inner peripheral surface of the frame 3, and bearing brackets 4 and 5 are attached to both ends of the frame 3, and bearing brackets 4 and 5 are attached to both bearing brackets 4 and 5, respectively. A shaft 9 of a rotor 8 is supported by a cylindrical roller bearing 6 and a ball bearing γ.

A ventilation fan 10 is fixed to one end of the shaft 9 of the rotor 8, and the ventilation fan 10 is attached to one of the bearing brackets 4.
Outside air is sucked into the machine through a ventilation filter 11 attached to the inside of the machine, and the air is passed through the ventilation filter 11 for ventilation cooling.

By the way, since the motor generator continuously operates at relatively high speed rotation, the lubricating grease filled in the bearing portion gradually deteriorates and the lubricating ability decreases.

Therefore, it is necessary to periodically disassemble the bearing, wash off old deteriorated grease, and refill it with grease.

However, in order to disassemble and assemble the bearing part, conventionally, as shown in FIG. , use a crane to pull out the rotor 8 from the frame 3, then remove the bearing 6.γ from the bearing brackets 4 and 5, clean it, refill it with new grease, and then use the reverse method to disassemble it. I had to do some assembly.

Therefore, in order to replace the grease, it is necessary to remove and install the motor generator from the vehicle body, and to disassemble and assemble the bearing using a disassembly tool or crane, which requires a great deal of labor and time. There were also drawbacks, such as the need to use specialized tools and equipment.

In view of these points, it is an object of the present invention to provide a rotating electric machine having a structure in which the bearing portion can be easily disassembled and assembled.

Hereinafter, one embodiment of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 3, at both ends of the frame 3, which is suspended from the vehicle body 1 by the mounting arms 3a via the anti-vibration rubber 2,
Bearing brackets 4 and 5 are attached, and on the inner diameter part of the bearing bracket 5, there is a housing 13.
is attached, and a ball bearing γ is attached to the inner diameter portion of the housing 13.

Furthermore, cylindrical roller bearings 6 are mounted on the inner diameter portion of the other bearing bracket 4, and both ends of a shaft 9 on which a rotor 8 and a ventilation fan 10 are mounted are supported by these bearings.

By the way, there is a fixed pole N4 on the outer periphery of one side of the frame 3.
Three tapped holes 15 are drilled at equal intervals on the circumference (Fig. 4) for mounting the bearing bracket 5 so as to be movable in the radial direction. There are tapped holes 16 for attaching three fixed poles N4b.

The bearing bracket 5 is further provided with two threaded holes 18 at diametrically opposed positions for mounting fixing bolts 1γ that can move forward and backward in the axial direction on its side surface, and are perpendicular to the line connecting both threaded holes 18. A through hole 20 for passing a second fixing bolt 19 for preventing axial movement of the rotating member is bored at a position facing the rotating member in the diametrical direction.
figure).

On the other hand, the second fixing bolt 19 is attached to the ventilation fan 10.
A tapped hole 21 for screwing into each bearing bracket is provided at a position that coincides with the through hole 20 provided in the bearing bracket.

In addition, the outer peripheral flange portion of the housing 13 has an insertion hole 23 through which a bolt 22 for fixing the housing 13 to the bearing bracket 5 is inserted, and a position offset in the circumferential direction with respect to the insertion hole 23. A screw hole 24 is provided (FIGS. 8 and 9).

In the figure, reference numerals 25 and 26 are end covers that cover the bearing portions, and 2γ is a bolt for attaching the bearing bracket 4 to the frame 3.

Therefore, when disassembling the bearing section for grease replacement, etc., first remove the three fixed poles H4a while the motor generator is suspended from the vehicle body 1, as shown in Figures 3 and 4. It is screwed into the hole 15 and its tip is brought into pressure contact with the outer periphery of one end of the rotor 6, and is held so that the one end of the rotor 6 does not move in the radial direction.

At the same time, the fixed pole N4b is screwed into the slotted hole 16 provided in the bearing bracket 5, and the outside air from the ventilation fan 10 is supported and fixed at three locations in the same manner as described above.

Next, the second fixing bolt 19 for preventing axial movement of the rotating member is inserted into the through hole 20 of the bearing bracket and screwed into the screw hole 21 provided in the ventilation fan 10.
Tighten the fixing bolt 28 to prevent the ventilation fan 10 from moving (Fig. 6), then screw the first fixing bolt 1γ into the tapped hole 18, press the side of the ventilation fan 10 with its tip, and rotate. The child 8 and the ventilation fan 10 are fixed in a predetermined position so that they do not move in the axial direction (FIG. 7).

Therefore, after fixing the housing 13 to the bearing bracket 5 and removing the bolt 23, screw the bolt 29 into the screw hole 24 provided in the housing 13, and attach the tip of the bolt 29 to the bearing bracket. 5), the housing 13 and the ball bearing 1 move together in the direction of the arrow A, and can be extracted (FIG. 8).

At this time, since the fitting part y1 between the inner diameter part of the ball bearing and the rotor shaft 9 has a tightness, the shaft 9 on which the rotor and rotating members such as ventilation fans are mounted also moves in the direction of pulling out the bearing due to frictional resistance. However, since the first fixing bolt 1γ prevents the rotating member from moving in the axial direction, the shaft 9 does not move, and there is no problem during work, and the ball bearing 1 etc. Even after being pulled out, the rotating member is held in the correct position by the fixed poles N4a and 14b.

When reassembling a ball bearing that has been refilled with new grease, as shown in FIG. By screwing into the screw hole, the housing 13 and the ball bearing γ can be moved together in the direction of arrow B, and can be mounted (FIG. 9).

At this time, the shaft 9 is moved to the rotor 8 due to the frictional resistance of the fitting portion y1.
However, the movement is prevented by the second axial movement blocking fixing bolt 19 and the fixing nand 28 screwed onto the blower fan.

The other circular roller bearing 60 can be disassembled by removing the bolts 2γ that attach the bearing bracket 4 to the frame 3, and pulling out the bearing bracket 4 in the direction of arrow C as shown in FIG. It can be done easily.

Furthermore, during this assembly, the bearing bracket 4 with the bearing mounted thereon is located near the end of the frame 3, and the bolt 21 is screwed into the mounting screw hole of the frame 3 and tightened. This allows the bearing part to be easily attached to the shaft 9. You can have it fitted externally.

Although the above embodiments have been described with respect to a motor generator, it is of course applicable to other rotating electric machines having a stator and a rotor.

Since the present invention is configured as described above, it is possible to disassemble, repair, or replace the bearing portion without removing the rotating electric machine from the vehicle body, etc., and to keep the rotating member in the normal position during the work. can continue to be held.

Therefore, the work of removing and reinstalling the rotating electric machine from the vehicle body, etc., the work of extracting the rotating member, the work of reinstalling it, and the tools for that purpose are completely eliminated, resulting in significant labor savings, including work time. It has effects such as being able to

[Brief explanation of the drawing]

Fig. 1 is a sectional view of a conventional motor generator, Fig. 2 is an explanatory diagram of the work of extracting the rotor, etc. of the motor generator, Fig. 3 is a sectional view of the rotating electric machine of the present invention, and Fig. 4 is a sectional view of the rotating electric machine of the present invention. Figure 3 is a vertical cross-section 11J view taken along the EV-EV line in Figure 3, Figure 5 is a view indicated by the ■-V line in Figure 3, and Figures 6 to 10 are a partial disassembly of the shaft tube of the rotating electric machine of the present invention. It is an explanatory diagram. 3... Frame, 4, 5... Bearing bracket, 6... Circular roller bearing, 1... Ball bearing, 8... Rotor, 9... Shaft, 10... Ventilation fan , 13...
Housing, 1516.18=-・Screw hole, 14a, 1
4b, 17°19...fixing bolt, 20...through hole.

Claims (1)

[Scope of utility model registration request] In a rotating electrical machine having a structure in which bearings attached to bearing brackets attached to both ends of the frame support both shaft ends of a rotating member such as a rotor disposed within the frame, the stator on both sides of the frame is On the outer periphery of the rotor, there are screw holes for mounting fixing bolts that contact the outer periphery of the rotor and the ventilation fan mounted coaxially with the rotor and fix the rotor and ventilation fan in the radial direction. A plurality of screw holes are provided in the left and right bearing brackets, and the bearing bracket to which the bearing is attached in an axially removable manner has a screw hole for attaching a first fixing bolt that comes into contact with the side surface of the ventilation fan, and a screw hole for attaching the first fixing bolt that comes into contact with the side surface of the ventilation fan. A second fixing bolt for preventing axial movement of the rotor and the ventilation fan is installed through a through hole, and the second fixing bolt is screwed into the ventilation fan at a position opposite to the through hole. A rotating electrical machine characterized by having screw holes for mating.