JPH052556U - Rotating electric machine - Google Patents

Abstract

(57) [Abstract] [Purpose] To obtain a device capable of easily and stably adjusting the end play of the rotary shaft from the outside of the bracket even after the end play adjustment of the rotary shaft of the rotating electric machine is assembled. [Composition] Stator 2, Rotor 3, Brame 1 that supports this
And a bracket 4 (load side, anti-load side). Reference numeral 6 denotes a rotating shaft on which a rotor is mounted and which is rotatably supported by bearings 5 (load side and anti-load side) mounted on the bracket. 8 is a mounting plate, the external thread of which is a male thread, and the outer end face of the rotating electrical machine has a graduation on the circumference.
14 is cut, and is screwed to a threaded female screw portion 7 for a mounting plate 8 provided on the bracket 4 so that the position can be adjusted in the axial direction of the rotating electric machine. [Effect] In the center of the bearing box side of the anti-load side bracket,
By providing a screw-in type mounting plate, the end play of the rotary shaft can be adjusted from the outside.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to improvement of end play adjustment of a rotary shaft of a rotary electric machine.

[0002]

[Prior Art]

 Hereinafter, for convenience of description, an electric motor will be described as an example. FIG. 3 is a partial cross-sectional view of a conventional electric motor. In the figure, it is an electric motor composed of a stator 2, a rotor 3, a frame 1 supporting the same, and a bracket 4 (load side, anti-load side). Reference numeral 6 denotes a rotary shaft on which the rotor 3 is mounted and which is pivotally supported by bearings 5 (load side and non-load side) mounted on the bracket 4. Reference numeral 12 is a spring or an adjustment washer for adjusting the end play of the rotary shaft 6, which is attached to a gap 13 between the bearing 5 and the bracket bearing housing 11 which are attached to the bracket 4 on the anti-load side.

When the electric motor main body is energized, the electric motor rotates a rotating shaft 6 supported by a bearing at a predetermined rotational speed. However, heat is generated from the electric motor between the bearing 5 and the bearing housing 11. Since 6 expands in the axial direction, it is necessary to provide a clearance 13. This gap 13 is the end play of the rotary shaft 6. When setting the end play of the rotary shaft 6 arbitrarily, insert the spring or the adjustment washer 12 into the gap 13 between the bearing 5 and the bearing housing 11 to adjust the end play of the rotary shaft 6. I am doing it.

[0004]

[Problems to be solved by the device]

 Since the conventional electric motor is configured as described above, when adjusting the end play of the rotary shaft to the required dimensions with the adjustment washer, the thickness of the adjustment washer including the dimensional accuracy of the bracket 4, rotary shaft 6, etc. Since it is necessary to adjust by the number of sheets and the number of sheets, there was a problem that it takes a lot of time and effort during the assembly work.

The present invention has been made to solve the above problems, and adjusts the clearance between the mounting plate and the bearing without performing the end play adjustment of the rotating shaft by the conventional adjustment washer. The purpose of the present invention is to provide a device that is capable of easily and stably adjusting the end play of the rotary shaft from the outside of the bracket after the motor is assembled.

[0006]

[Means for Solving the Problems]

 In the rotating electric machine according to the present invention, a female screw portion is provided in the center of the side surface of the bearing box of the anti-load side bracket, and the female screw portion is screwed into the screw portion so as to abut the outside of the bearing outer ring mounted on the rotating shaft. A screw-in type mounting plate is provided.

[0007]

[Action]

 According to the present invention, in the end play adjustment of the shaft of the rotating electric machine, a female screw portion is provided in the central portion of the side surface of the bearing box of the anti-load side bracket, and the female screw portion is screwed to the screw portion and mounted on the rotating shaft of the rotor. A screw-in type mounting plate that is in contact with the outside of the bearing outer ring is provided.By adjusting the amount of screwing in of this mounting plate, the clearance between the mounting plate and the bearing can be adjusted, making it an easy and stable rotating shaft. End play adjustment can be made.

[0008]

【Example】

 Example 1. An embodiment of the present invention will be described below with reference to FIGS. In the figure, the electric motor is composed of a stator 2, a rotor 3, a frame 1 supporting the same, and a bracket 4 (load side, anti-load side). Reference numeral 6 denotes a rotating shaft on which the rotor 3 is mounted and which is pivotally supported by bearings 5 (load side and anti-load side) mounted on the bracket 4. 7 is a female screw portion provided in the center of the side surface of the bearing box 11 of the bracket 4, 8 is screwed to the female screw portion so as to be movable back and forth in the axial direction of the rotating electric machine, and a scale 14 is marked on the outer end face. A mounting plate, 10 is a gap provided between the bearing 5 and the mounting plate 8, and a gap 12 is a spring inserted in the gap 10.

Since the rotary electric machine is configured as described above, the skimmer 10 can be adjusted by rotating the mounting plate 8 from the outside of the bracket 4 after the rotary electric machine is assembled After the plate is screwed in the direction of the rotor 3 and brought into contact with the spring or the adjustment washer, the scale 14 provided on the mounting plate 8 is used to screw the mounting plate back to the outside of the rotating electric machine to remove the gap 10. It becomes possible to fit in a predetermined size. Further, since the screw pitch of the mounting plate 8 is known, the gap 10 can be reliably aligned even if there are variations in the dimensions of the rotary electric machine components. After the adjustment of the gap 10, the mounting plate 8 is non-rotatably fixed by applying an adhesive or by caulking the screw portion of the mounting plate 8.

[0010]

[Effect of the device]

 As described above, according to the present invention, by providing a screw-in type mounting plate in the center of the bearing box side surface of the anti-load side bracket, the clearance between the mounting plate and the bearing can be adjusted, and the outer side of the bracket can be adjusted. Therefore, the end play of the rotary shaft can be adjusted easily and accurately and stably.

[Brief description of drawings]

FIG. 1 is a partial cross-sectional view showing an electric motor according to an embodiment of the present invention.

FIG. 2 is a left side view of a mounting plate of an electric motor according to an embodiment of the present invention.

FIG. 3 is a partial cross-sectional view showing a conventional electric motor.

[Explanation of symbols]

 1 Frame 2 Stator 3 Rotor 4 Bracket 5 Bearing 6 Rotating shaft 7 Bracket mounting seat screw part 8 Mounting plate 9 Mounting plate screw part 10 Clearance between mounting plate and bearing 11 Bracket bearing box part 12 Spring Or adjustment washer 13 Clearance between bearing and bearing housing 14 Scale

Claims (1)

[Claims for utility model registration] 1. A rotation having a stator, a frame that supports the rotor, a bracket, and a rotary shaft that is pivotally supported by bearings mounted on the bracket and to which the rotor is fixed. In the electric machine, a female screw portion provided in the center of the side surface of the bearing box of the bracket, a screw-in type mounting plate that is screwed to the screw section and abuts the bearing from the outside of the bearing box, and the mounting plate A rotary electric machine characterized in that a plurality of graduations are provided on the circumference of the end face.