JPS6029328Y2 - Vibration isolation device for small electric motors - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a vibration-proof mounting device for a small electric motor having a vibration-proof structure.

In general, single-phase induction motors, by their nature, generate vibrations at a frequency twice the power supply frequency around the motor in the direction of rotation.
This may cause other equipment to vibrate and generate noise.

Conventionally, in order to prevent these vibrations, devices as shown in FIGS. 1 to 4 have been used.

That is, as shown in FIGS. 1 to 4, the motor body consisting of a fixed part 1 and a bracket 2 is prevented from vibrating to the mounting leg 3 by a vibration-proof link attached to the bearing part of the bracket 2.

In this case, the anti-vibration link is provided with a reinforcing ring 5 having a partially cutout portion 4 on the outer circumference of the anti-vibration rubber 6, and an end on the inside of the anti-vibration rubber 6 for attachment to the bearing of the bracket 2. A plate 7 is provided.

The vibration isolation link and the mounting leg 3 are fixed by attaching a presser metal fitting 8 to a part of the mounting leg 3 and tightening bolts 9 and nuts 10.

In the conventional mounting device, there is a partial notch 4 on the outer periphery of the vibration isolating link.
In order to use the reinforcing ring 5 having a Since the diameter is also rough, there will be a large deviation in the center height of the shaft tip from the bottom of the mounting leg.

In order to adjust this deviation in center height, the tightening condition of the bolt 9 is adjusted, but the bolt 9 may be over-tightened or under-tightened.

If the bolts 9 are over-tightened, the elasticity of the anti-vibration rubber 6 will be reduced, resulting in a reduction in the anti-vibration effect, and if the bolts 9 are insufficiently tightened, the reinforcement ring 4 of the anti-vibration link and the holding fitting 8 will be damaged. Because the friction torque of the motor decreases, causing problems such as the motor body idling, it was necessary to fix it with adhesive.

The present invention solves these problems.

The present invention will be explained with reference to FIGS. 5 and 6. Figures 1 and 2
As shown in the figure, the motor body is attached to the mounting leg 3 via a vibration-proof link to prevent vibration, and the presser fitting 8, bolt 9, nut 10
This is the same as before.

The present invention relates to a vibration isolating link which is the main cause of the center height adjustment vibration isolating effect.

As shown in FIGS. 5 and 6, the anti-vibration link is constructed by providing a reinforcing ring 5 without a cutout on the inner outer periphery of the anti-vibration rubber 6, and the outer periphery of the anti-vibration link is It is formed of a swinging rubber 6.

Further, the side surface of the end plate 7 provided on the inner circumferential portion of the vibration isolating rubber 6 is covered with the vibration isolating rubber.

According to the vibration isolating device for a small electric motor of the present invention, the reinforcing ring of the vibration isolating link eliminates the notch and is provided inside the vibration isolating rubber, thereby improving concentricity accuracy and roundness, which were problems in the past. Since the accuracy is greatly improved, not only is the hassle of center height adjustment eliminated, but the vibration-proofing effect is no longer impaired due to over-tightening of bolts.

In addition, since the outer periphery of the anti-vibration link is made of anti-vibration rubber,
At the same time, idling of the electric motor body can be prevented.

Furthermore, by covering the side surfaces of the end plates with anti-vibration rubber, it becomes possible to eliminate the chattering noise of the end plates, which has been a problem in the past.

[Brief explanation of drawings]

Figure 1 is a side view of a conventional vibration isolation device for a small electric motor, Figure 2 is a front view of the same device, Figure 3 is a sectional view of the main parts of the device, and Figures 4 a and b are used in the same device. 5 is a cross-sectional view of the essential parts of a vibration isolating device for a small electric motor according to an embodiment of the present invention, and FIGS. 6a and 6b are 1 shows a side view and a front view of a reinforcing ring provided in the vibration isolating rubber used in the present invention. 1... Stator part, 2... Bracket,
3...Mounting leg, 5...Reinforcement ring, 6
...Vibration-proof rubber, 7...End plate, end...
・・Presser metal fitting, 9・・・・・Bolt.

Claims (1)

[Scope of utility model registration request] A vibration isolating link is provided in which a reinforcing ring without a notch is provided on the outer periphery of the vibration isolating rubber, and the side surface of the end plate is covered with the vibration isolating rubber, and a motor bracket is attached to the inner diameter of the end plate of the vibration isolating link. A vibration isolating device for a small electric motor, which is made by fitting the bearing part and tightening the outer periphery of the vibration isolating link to the mounting leg with a holding metal fitting.