JPH089584A - Mount for motor - Google Patents

Abstract

PURPOSE:To prevent the decentering of a motor by improving the durability and vibration proofing capacity of a mount for a motor. CONSTITUTION:An elastomer member 13 is joined between the mounting seat 11b on body side of a first mounting member 11 on body side and the flange part 12a of a second mounting member 12 on motor side, and a bearing 14 is interposed between the inner cylinder it 11a of the first mounting member 11 and the outer cylinder 12a of the second mounting member 12, and this bearing 14 holds the first mounting member 11 and the second mounting member 12 coaxially with each other, whereby the transformation in eccentricity direction of the elastomer member 13 is suppressed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor mount mounted on a mounting portion of a motor, for example, a stepping motor, for insulating torsional vibrations caused by rotational driving of the motor from the apparatus body side.

[0002]

2. Description of the Related Art Stepping motors are used for paper feeding of facsimiles, copying machines, etc., and for servo driving of print heads and paper feeding of printers. These motors generate torsional vibrations when driven. From the above, it is attached to the inner wall surface of the machine body of the above-mentioned facsimile machine or the like via a vibration-proof mount.

As shown in FIG. 2, a conventional mount of this type has a plate-shaped body-side mounting member 1 and this body-side mounting member 1.
And a plate-shaped motor-side mounting member 2 arranged to face each other elastically connected via a ring-shaped elastomer member 3. Then, as shown in the mounted state in FIG. 3, the fuselage-side mounting member 1 is a wall body inside the fuselage (hereinafter, referred to as an inner wall body)
4, the motor side mounting members 2 are respectively connected to the stepping motor 5, and the torsional vibration generated in the stepping motor 5 is insulated by the torsional deformation operation of the elastomer member 3 to reduce the transmission of the vibration to the inner wall 4 of the machine. Is.

[0004]

In the above-described conventional motor mount, when the stepping motor 5 is mounted on, for example, the inner wall body 4 extending in the vertical direction, the elastomer member 3 has an axial center depending on the weight of the stepping motor 5. Since a load is applied in a direction intersecting with (hereinafter, referred to as an eccentric direction), the original state shown in FIG. 2 is deformed to the state shown in FIG. Therefore, it is pointed out that the stepping motor 5 is misaligned δ, the output shaft 5a thereof receives a bending load, and the durability of the elastomer member 3 is lowered. In particular, in this type of mount, it is effective to reduce the spring constant of the elastomer member 3 in order to increase the vibration insulation rate, but the support force for the stepping motor 5 is increased to suppress the above-mentioned positional deviation δ. On the contrary, in order to improve the durability of the elastomer member 3, it is necessary to increase the spring constant to some extent, so that it is difficult to sufficiently increase the vibration insulation rate.

The present invention has been made under the circumstances described above, and its main technical problems are to improve the durability and vibration isolation performance of the motor mount, and to correct the misalignment of the motor. To prevent.

[0006]

The above-mentioned technical problems are as follows.
The present invention can effectively solve the problem. That is, the motor mount according to the present invention is arranged on the outer periphery of the inner cylindrical portion and the first mounting member including the fuselage side mounting seat expanded from one end of the inner cylindrical portion to the outer diameter side. A second mounting member having a flange portion formed from one end of the outer cylinder portion to the outer diameter side to face the machine body side mounting seat, and a motor side mounting seat formed at the other end, and the machine body side mounting member An elastomer member joined between the seat and the flange portion, and a bearing interposed between the inner tubular portion and the outer tubular portion.

[0007]

The second mounting member mounted on the motor at the motor side mounting seat is the outer cylinder portion of the first and second mounting members, while the second mounting member is mounted at the motor side mounting seat on the motor side. Torsional vibration generated in the motor is insulated by being rotatably supported via a bearing between the inner cylinder portion and the inner cylinder portion and being connected via an elastomer member capable of being torsionally deformed. Since the relative eccentricity of the first and second mounting members is restricted by the bearing, the elastomer member is not subject to deformation in the eccentric direction.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a mounting state of an embodiment of a motor mount according to the present invention. Reference numeral 4 is a part of the inner wall of the machine which rises up and down in a device such as a facsimile. Reference numeral 5 denotes a stepping motor mounted on the inner wall 4 of the machine via the motor mount 10 of this embodiment. The motor mount 10 includes a first mounting member 11 mounted on the inner wall 4 of the machine, a second mounting member 12 on which the stepping motor 5 is seated, and the first and second mounting members 11 and 12 interposed therebetween. And an elastomer member 13 and a bearing 14.

The first mounting member 11 is composed of an inner cylinder portion 11a and a machine body side mounting seat 11b which is expanded from one end of the inner cylinder portion 11a to the outer diameter side. The machine body side mounting seat 11b is attached to the machine inner wall body 4. It is fixed via a screw member (not shown). The second mounting member 12 includes an outer cylindrical portion 12a arranged on the outer periphery of the inner cylindrical portion 11a, and a flange portion 12b that is expanded from one end thereof to the outer diameter side and faces the machine body side mounting seat 11b.
And a motor side mounting seat 12c extending from the other end of the outer tubular portion 12a to the inner diameter side, the stepping motor 5
Is seated and attached to the motor side mounting seat 12c through a screw member (not shown) on the side where the output shaft 5a protrudes. The elastomer member 13 is vulcanized and bonded between the airframe side mounting seat 11b of the first mounting member 11 and the flange portion 12b of the second mounting member 12, and the bearing 14 is made of a synthetic resin material having a low friction coefficient. It is a ring-shaped body and is slidably interposed between the outer cylinder portion 12a and the inner cylinder portion 11a.

The output shaft 5a of the stepping motor 5
Is inserted from the inner peripheral hole 12d of the motor side mounting seat 12c of the second mounting member 12 through the inner peripheral space of the inner cylindrical portion 11a of the first mounting member 11 into the shaft hole 4a of the machine inner wall body 4.

In the motor mount 10 according to this embodiment, the first mounting member 11 fixed to the inner wall 4 of the machine.
On the other hand, the second mounting member 1 on the stepping motor 5 side
When the stepping motor 5 is vibrated in the twisting direction due to driving, the elastomer member 13 is twisted when the stepping motor 5 is driven. Due to the deformation and sliding of the bearing 14, the vibration transmitted to the inner wall 4 of the machine is effectively absorbed and insulated. Further, since the bearing 14 is made of synthetic resin, it has an appropriate cushioning function against radial vibration displacement.

Since the first and second mounting members 11 and 12 are held concentrically with each other by the bearing 14,
The elastomer member 13 is hardly deformed in the eccentric direction due to the weight of the stepping motor 5, so that the durability thereof is improved and the misalignment (eccentricity) of the stepping motor 5 is prevented. Further, since it is not necessary for the elastomer member 13 to bear the supporting force against the load of the stepping motor 5, it is possible to sufficiently lower the spring constant and improve the vibration insulation.

[0013]

According to the motor mount of the present invention, the load in the eccentric direction is received by the bearing, and the elastomer member is prevented from being deformed in the eccentric direction by the load of the motor. Since the durability of the elastomer member is improved and the spring constant of the elastomer member can be made sufficiently low, the excellent effect of improving the vibration insulation property is realized.

[Brief description of drawings]

FIG. 1 is a sectional view showing a usage state of an embodiment of a motor mount according to the present invention by cutting along a plane passing through an axis.

FIG. 2 is a sectional view showing a conventional example of a motor mount, taken along a plane passing through an axis.

FIG. 3 is a cross-sectional view showing a state of use of the above conventional example by cutting along a plane passing through an axis.

[Explanation of symbols]

 4 Machine Inner Wall 4a Shaft Hole 5 Stepping Motor 10 Motor Mount 11 First Mounting Member 11a Inner Cylinder 11b Machine Body Side Mounting Seat 12 Second Mounting Member 12a Outer Cylinder 12b Flange 12c Motor Side Mounting Seat 12d Inner Circumference Hole 13 Elastomer member 14 Bearing

Claims (1)

[Claims] 1. An inner cylinder part (11a) and this inner cylinder part (11)
(a) Airframe side mounting seat (11)
a first mounting member (11) composed of b) and an outer tubular part (12) arranged on the outer periphery of the inner tubular part (11a).
a) A second mounting in which a flange portion (12b) is formed from one end to the outer diameter side to face the machine body side mounting seat (11b) and a motor side mounting seat (12c) is formed at the other end. A member (12), an elastomer member (13) joined between the fuselage-side mounting seat (11b) and a flange portion (12b), and an inner tubular portion (11a) and an outer tubular portion (12a). A motor mount comprising: a bearing (14) interposed therebetween.