JPH05344681A - Device for mounting outer fan cover to fan-cooled electric rotating machine - Google Patents

Abstract

PURPOSE:To mount the outer fan cover of a fan-cooled electric rotating machine around a bearing bracket easily in vibrationproofing condition, reducing the number of required parts. CONSTITUTION:An elastic plastic vibrationproofing member 16a is attached firmly merely by setting it in the mounting hole of an outer fan cover 5 from inside, and the projections 16d at the inner end face of this vibrationproofing member 16a are set in the circumferential grooves 13b provided at the periphery of a plurality of mounts 13a at the periphery of a bearing bracket, and also the vibrationproofing member 16a at one part in the position where fastening work is easy is fixed to the mount 13a by screws 17.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mounting device for an external fan type electric rotating machine, in which an external fan cover can be easily mounted on the outer peripheral portion of a bearing bracket in a vibration-proof manner.

[0002]

2. Description of the Related Art A conventional example of an outer fan cover mounting device for an outer fan type rotary electric machine will be described with reference to FIG. In this figure, a bearing bracket 3 that supports the rotary shaft 2 is attached to the end surface of the tubular frame 1, and an external fan 4 is fixed to the end of the rotary shaft 2 that projects through the bearing bracket 3. An outer fan cover 5 that surrounds the outer fan 4 has a cylindrical vibration-proof bushing 6 made of an elastic material such as rubber fitted in a plurality of mounting holes provided at an outer peripheral end thereof, and bearings are inserted through the bushing 6. The bracket 3 is attached to the mounting seat 3a protruding from the outer periphery by tightening with a screw 7. The bush 6 is for preventing the outer fan cover 5 from resonating with electromagnetic vibration of the electric machine body to generate noise. This bush 6 is provided with an annular groove 6a on the outer peripheral portion that fits into the mounting hole of the outer fan cover 5, and the outer fan cover 5 is fitted in the rear seat 3a after the bush 6 is fitted, and is fitted in the direction of the arrow by screws 7. ..

[0003]

In the above structure, since the outer diameter of the bush 6 is larger than the mounting hole of the outer fan cover 5, a lot of work is required for fitting into the mounting hole portion, and the outer fan cover 5 is a bearing. Among the plurality of screws 7 mounted on the mounting seat 3a of the bracket 3, those located near the floor surface have a drawback that the tightening work is difficult.

In order to eliminate the above-mentioned drawbacks, the present invention provides
It is an object of the present invention to provide an outer fan cover mounting device for an outer fan type rotating electric machine, in which an outer fan cover can be easily attached to the outer peripheral portion of a bearing bracket in a vibration-proof manner.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention uses vibration-proof members 16a, 16b or 26a, 26b which are fitted in the mounting holes of the outer fan cover 5 and have a stepped portion on the outer periphery made of elastic plastic. 16c, 26c and ridges 16d, 26d on the inner end face and the ridges 16d, 26d
Positioning stoppers 16e, 2 perpendicular to the one end of the
6e and the step portion 16c,
The vibration damping members 16a, 16b, 26a are mounted on the outer circumferences of the bearing brackets 13, 23 by projecting them into the mounting holes from the inside until 26c contacts the outer fan cover 5. , 26b ridge 1
Circumferential grooves 13b, 23b that fit into 6d, 26d
Is provided, and the ridges 16d, 26d are fitted into the grooves 13b, 23b from the other end side, and the vibration-proof members 16a, 16b, 26 are provided.
A suitable portion of a and 26b is fixed to the mounting seat 13a with the screw 17, or the mounting seat 23a is pressed by the tip surface of the screw 27 that is threaded through the appropriate portion and screwed into the mounting seat 23a. The cover 5 is attached to the bearing brackets 13 and 23, and if necessary, the vibration damping members 16a, 16b, 26a and 26b.
Guides 16f, 2 for fitting the protrusions 16d, 26d into the circumferential grooves 13b, 23b of the mounting seats 13a, 23a.
6f is integrally formed.

[0006]

[Function] The vibration damping members 16a, 16b, 26a, 26b
The guides 16f, 26f are for determining the axial position of the outer fan cover 5 fitted in the bearing brackets 13, 23 by abutting on the mounting seats 13a, 23a. If the outer fan cover 5 is fitted into the bearing brackets 13 and 23 and the axial positions of the mounting holes are aligned with the mounting seats 13a and 23a, the outer fan cover 5 is rotated in the circumferential direction, and then the vibration damping members 16a and 16 are provided.
b, 26a, 26b ridges 16d, 26d are attached to the seat 1
3a, 23a can be easily fitted in the grooves 13b, 23b, and the stoppers 16e, 26e can be attached to the mounting seat 13
The circumferential position of the outer fan cover 5 can be easily determined by abutting on the a and 23a. In this state, if a part of the vibration-proof members 16a, 16b, 26a, 26b that can be easily tightened is fixed to the mounting seats 13a, 23a, the outer fan cover 5 becomes immovable and a small number of screws 17,
With 27, vibration-proof mounting can be easily performed on the outer peripheral portions of the bearing brackets 13, 23.

[0007]

1 and 2 show an embodiment corresponding to claims 1 and 3 of the present invention, and the same reference numerals as those in FIG. 5 represent the same parts. In these figures, the vibration isolating members 16a and 16b made of elastic plastic are fitted into the mounting holes of the outer fan cover 5, and the vibration isolating member 16 is formed.
The outer fan cover 5 is attached to the bearing bracket 13 via a and 16b.
Is attached to a plurality of mounting seats 13a protruding from the outer circumference. The anti-vibration members 16a and 16b are provided with a step portion 1 on the outer circumference.
6c and a ridge 16d on the inner end face, and a positioning stopper 16e orthogonal to the ridge 16d on one end of the ridge 16d. The step 16c is fitted into the mounting hole from the inner side until the step 16c abuts the outer fan cover 5. Mounted. A circumferential groove 13b is provided on the outer periphery of the mounting seat 13a so as to fit tightly with the protrusion 16d of the vibration-proof members 16a and 16b, and the protrusion 16d is fitted into the groove 13b from the other end side. When the protrusions 16d are fitted into the grooves 13b, they are elastically deformed so as to fit tightly together. At this time, the protrusions 16d also press against the outer fan cover 5 and are fixed in the radial direction so that they cannot move.

An outer fan cover 5 fitted in the bearing bracket 13 in the direction of the arrow is further attached to the vibration isolating members 16a and 16b.
The guide 16f for determining the axial position of the
The guide 16f is formed integrally with the outer fan cover 5a so as to extend in parallel with the other end side, and the guide 16f is brought into contact with the mounting seat 13a.
After the axial position of the mounting hole is aligned with the mounting seat 13a, the outer fan cover 5 is rotated in the circumferential direction until the stopper 16e abuts the mounting seat 13a, and the protrusion 16d is fitted into the groove 13b. The position of 5 in the circumferential direction can be determined. In this state, the vibration isolation members 16a, 1
Of the 6b, the vibration damping member 16a on the upper part that can be easily tightened
Only (one place in the figure) is fixed to the mounting seat 13a by tightening with the screw 17. In addition, protrusions 16g for hanging fingers when the outer fan cover 5 is rotated in the circumferential direction are provided on the outer end surfaces of the vibration isolation members 16a and 16b.

3 and 4 are claims 2 and 3 of the present invention.
1 and 2 and FIG. 5 are the same parts. In these figures, the vibration isolation members 26a and 26b formed of elastic plastic are fitted into the mounting holes of the outer fan cover 5,
A plurality of mounting seats 23 in which the outer fan cover 5 is projectingly provided on the outer periphery of the bearing bracket 23 via the vibration-proof members 26a and 26b
It is attached to a. Anti-vibration members 26a, 26b
Is provided with a step portion 26c on the outer periphery, a protrusion 26d on the inner end surface, and a positioning stopper 26e orthogonal to the protrusion 26d on one end of the protrusion 26d. From the inside until the step portion 26c abuts the outer fan cover 5. It can be mounted by firmly fitting it in the mounting hole. The vibration isolation member 2 is provided on the outer periphery of the mounting seat 23a.
Circumferential groove 2 that fits with ridge 26d of 6a, 26b
3b is provided, and the ridge 26d is fitted into the groove 23b from the other end side.

A guide 26f, which is fitted to the bearing bracket 23 and is used to determine the axial position of the outer fan cover 5, is formed integrally with the vibration isolation members 26a and 26b at the other end side in parallel with the protrusion 26d. This guide 26f
After contacting the mounting seat 23a with the axial position of the mounting hole of the outer fan cover 5 aligned with the mounting seat 23a, the outer fan cover 5 is rotated in the circumferential direction until the stopper 26e contacts the mounting seat 23a. By fitting the protrusion 26d into the groove 23b, the position of the outer fan cover 5 in the circumferential direction can be determined. In this state, the tip end surface of the screw 27 which is screwed through the upper vibration isolating member 26a (one position in the figure) which is easy to tighten the vibration isolating members 26a and 26b is attached to the bottom of the groove 23b of the mounting seat 23a. The bottom surface of the counterbore 23c provided is pressed, and accordingly, the vibration-proof members 26a and 26b and the outer fan cover 5 are also pressed and fixed in the radial direction, and cannot be moved. The counterbore 23c is provided to prevent the screw 27 from moving in the circumferential direction, and the antivibration member 26
The outer end surfaces of a and 26b are provided with protrusions 26g for hanging fingers when the outer fan cover 5 is rotated in the circumferential direction.

According to the above-mentioned embodiment, the vibration-proof members 16a, 16
b, 26a, 26b can be easily mounted by simply fitting them into the mounting holes of the outer fan cover 5 from the inside, and the ridges 16d, 26d can be easily mounted using the guides 16f, 26f.
The vibration-proof members 16a, 16 having the grooves 13b, 23b fitted therein.
b, 26a, 26b, a part of which is easy to tighten can be attached to the mounting seats 13a, 23a with a small number of screws 17, 27.
Since the outer fan cover 5 can be easily attached to the outer peripheral portions of the bearing brackets 13 and 23 by reducing the number of required components, the outer fan cover 5 can be easily attached in a vibration-proof manner.

In the above embodiment, the case where the stoppers 16e and 26e are provided on all the vibration isolating members 16a, 16b, 26a and 26b has been described.
It may be omitted for other than 6a and 26a.

[0013]

According to the present invention, in an outer fan cover mounting device for an outer fan type rotating electric machine, a plastic vibration isolating member having elasticity is fixed by simply fitting it into the mounting hole of the outer fan cover from the inside. Fit the ridges on the inner end face of the bearing into the grooves in the circumferential direction provided on the outer periphery of the multiple mounting seats on the outer periphery of the bearing bracket, and screw a part of the vibration-damping member on the mounting seat for easy tightening work. Since it is fixed, the outer fan cover can be easily attached to the outer periphery of the bearing bracket with vibration-proofing by reducing the number of required parts, and the vibration-proofing member is provided with a guide for fitting the protrusion into the groove. If so, it is possible to obtain an effect that the fitting work becomes easier.

[Brief description of drawings]

1A is a longitudinal sectional view of an essential part of an embodiment corresponding to claims 1 and 3 of the present invention, FIG. 1B is a side view of FIG. 1A,
FIG. 1C is a cross-sectional view taken along the line AA of FIG.

FIG. 2 is a side view showing the whole of FIG. 1 (b).

3 (a) is a longitudinal sectional view of an essential part of an embodiment corresponding to claims 2 and 3 of the present invention, FIG. 3 (b) is a side view of FIG. 3 (a),
3C is a cross-sectional view taken along the line AA of FIG.

FIG. 4 is a side view showing the whole of FIG. 3 (b).

5A is a vertical cross-sectional view of a main part of a conventional example, and FIG.
Enlarged vertical cross-sectional view of the main part of (a)

[Explanation of symbols]

 5 Outer fan cover 13 Bearing bracket 13a Mounting seat 13b Groove 16a Anti-vibration member 16b Anti-vibration member 16c Step 16d Projection 16e Stopper 16f Guide 17 Screw 23 Bearing bracket 23a Mounting seat 23b Groove 26a Anti-vibration member 26b Anti-vibration member 26c Step Part 26d ridge 26e stopper 26f guide 27 screw

Claims (3)

[Claims] 1. A mounting device for mounting an outer fan cover of an outer fan type rotary electric machine on a plurality of mounting seats projecting on the outer periphery of a bearing bracket through a vibration damping member fitted in a mounting hole.
The vibration-damping member is formed by using a plastic having elasticity and is provided with a step portion on the outer periphery and a ridge on the inner end surface and a positioning stopper orthogonal to this at one end of the ridge, and the step portion is formed on the outer fan cover. Install by firmly fitting it into the mounting hole from the inside until it abuts, and provide a circumferential groove on the outer periphery of the mounting seat of the bearing bracket that fits with the protrusion of the vibration-proof member. An outer fan cover mounting device for an outer fan type rotating electric machine, characterized in that an appropriate part of a fitted vibration damping member is fixed to a mounting seat with a screw and the outer fan cover is mounted on a bearing bracket. 2. A mounting device for mounting an outer fan cover of an outer fan type rotary electric machine to a plurality of mounting seats projecting from the outer periphery of a bearing bracket through a vibration damping member fitted in a mounting hole.
The vibration-damping member is formed by using a plastic having elasticity and is provided with a step portion on the outer periphery and a ridge on the inner end surface and a positioning stopper orthogonal to this at one end of the ridge, and the step portion is formed on the outer fan cover. Install by firmly fitting it into the mounting hole from the inside until it abuts, and provide a circumferential groove on the outer periphery of the mounting seat of the bearing bracket that fits with the protrusion of the vibration-proof member. The outer fan cover is mounted on the bearing bracket by pressing the mounting seat with the tip surface of a screw threaded through an appropriate part of the fitted vibration-proof member, and the outer fan-shaped rotating electric machine outer Fan cover mounting device. 3. The outer fan cover mounting device for an outer fan type rotating electric machine according to claim 1 or 2, wherein a guide is provided integrally with the vibration isolating member when the protrusion is fitted in the circumferential groove of the mounting seat. An outer fan cover attachment device for an outer fan type rotating electric machine.