JPH03243149A - Motor support - Google Patents

Abstract

PURPOSE:To suppress vibration of a motor in the axial direction by arranging resilient bodies at four positions such that the longitudinal directions thereof are perpendicular to the rotary shaft of motor in two directions crossing perpendicularly to each other. CONSTITUTION:A vibration-proof rubber 7 comprises a resilient body having spring constant high in radial direction and low in thrust direction. The vibration-proof rubbers 7 are disposed at four positions such that the longitudinal directions thereof are perpendicular to the rotary shaft 3, i.e. two opposing points A and other two oppositing points B in the directions crossing perpendicularly to each other, and a motor 2 is supported on a motor fixing part, i.e. a flange 1a. Consequently, the motor can be supported with a high spring constant against vibration in vertical and lateral directions without causing metallic contact between the flanges. Since the motor is supported through the resilient body against the metallic part, vibration is not transmitted directly resulting in suppression of vertical and lateral displacement of the motor.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a motor support device for mounting and supporting a motor on a mounting portion.

[Conventional technology]

FIG. 5 is a partially cross-sectional side view showing a conventional motor support device. In the figure, 1 is a fixed base, and 1a is a ring-shaped flange as a motor mounting part provided integrally with the fixed base 1. , 2 is a motor attached to the flange 1a, 2
a is the motor flange for mounting provided on motor 2;
3 is the rotating shaft of the motor 2, 4 is a pinion provided on the rotating shaft 3, 5 is a gear that meshes with the pinion 4, 6 is the shaft of the gear 5 provided on the fixed base 1, and 7 is a shaft that passes through the flange 1a. This is an elastic body for vibration isolation provided in the vertical direction, and here a cylindrical vibration isolation rubber 7 is used. Reference numeral 8 designates a bolt for tightening and fixing the motor flange 2a and flange 1a via vibration isolating rubber 7, and 9 designates a contact portion where the motor flange 2a and flange 1a come into metal contact. Next, the operation will be explained. The rotation of the motor 2 causes the pinion 4 to rotate, and the gear 5 that meshes with the pinion 4 to rotate. The vibration of the motor 2 generated at this time is transmitted to the flange 1a and the fixed base 1 via the vibration isolating rubber 7. A pinion 4 is directly attached to the rotating shaft 3 of the motor 2, and by meshing with the gear 5, a force is applied in the direction R in which the motor 2 moves away from the fixed base 1, and a force is applied to the flange 1a and the motor flange 2a. A shearing force F acts on them, causing them to slide against each other. This shearing force F corresponds to a load in the radial direction on the cylindrical vibration isolating rubber 7, as shown in FIG. The cylindrical vibration isolating rubber 7 is made of an elastic body having a spring constant that is high in the radial direction and low in the thrust direction, and is designed to absorb the load in the radial direction. Further, since the motor flange 2a and the flange 1a are directly fixed by metal contact at the contact portion 9 using bolts 8, the vibration isolating rubber 7 does not displace in the vertical direction, that is, in the thrust direction. The vibration in the vertical direction is transmitted from the motor flange 2a to the fixed base 1 through the flange 1a via the contact portion 9. In addition, as a publicly known technique related to this invention,
There is one shown in Publication No. 922.

[Problem to be solved by the invention]

Since the conventional motor support device is constructed as described above, it is necessary to bring the flange surfaces of the flange la and the motor flange 2a into metal contact, which makes it impossible to suppress the vertical vibration of the motor 2. As a result, there were problems such as vibration noise of the motor 2 being transmitted to the fixed base 1 and being amplified. This invention was made to solve the above-mentioned problems, and it is possible to suppress the axial vibration of the motor, and attenuate vibration and noise by completely avoiding metal contact in the support part. The object of the present invention is to obtain a motor support device that allows for

[Means to solve the problem]

The motor support device according to the present invention includes a cylindrical elastic body having a spring constant high in the radial direction and low in the thrust direction.
A total of four locations, the longitudinal direction of which is perpendicular to the motor rotation axis and two directions facing the rotation axis and two directions perpendicular to the rotation axis, or two positions facing the motor rotation axis. direction and 2 from the same direction orthogonal to it
They were installed at four locations in total, depending on the direction.

[Effect]

Due to the arrangement of the cylindrical elastic bodies in this invention, all the cylindrical elastic bodies carry loads in the radial direction against loads transmitted to the motor in all directions. It is possible to support vibrations with a high spring constant, and it is possible to avoid metal contact between flanges like in the past. As a result, the motor is completely elastically supported from the metal part via the elastic body, vibrations are not directly transmitted, and vertical and horizontal displacement of the motor is suppressed to a low level.

【Example】

An embodiment of the present invention will be described below with reference to the drawings. 1st
In the drawings and FIG. 2, parts corresponding to those in FIG. 5 are given the same reference numerals, and explanations thereof will be omitted. In FIGS. 1 and 2, 7 is a vibration isolating rubber made of an elastic body that has a cylindrical shape similar to that in FIG. 5 and whose spring constant is high in the radial direction and low in the thrust direction. , there are two points A and two points B, total of 4 points.
It is placed in several places. That is, as shown in the figure, the longitudinal direction (axial direction) of each anti-vibration rubber 7 is perpendicular to the rotating shaft 3 of the motor 2 and facing the rotating shaft 3, and the other direction is perpendicular to the rotating shaft 3 and facing the rotating shaft 3. The motor 2 is mounted and supported on the ring-shaped flange 1a serving as the motor mounting portion by being arranged at four locations in two directions. Next, the operation will be explained. Due to the rotation of the motor 2, component forces are generated in the tangential direction and the normal direction to the pitch circle at the meshing portion between the gear 5 and the pinion 4. As shown in Figure 2, the tangential component force is B
The two anti-vibration rubbers 7 at the point carry the load in the radial direction, and the two anti-vibration rubbers 7 at the point A also carry the component force in the normal direction as a load in the radial direction. Furthermore, even with respect to the load acting on the motor 2 in the vertical direction, the four anti-vibration rubbers 7 at points A and B bear the load in the radial direction. Therefore, since all the load is received as a radial load with a high spring constant, the displacement of the motor 2 itself can be considerably suppressed. Further, the rotation M of the motor 2 around the axis at point A due to the normal load is also suppressed because the two anti-vibration rubbers 7 at point B have the bearing as a radial load. At this time, since the motor 2 is completely elastically supported from the flange 1a via the anti-vibration rubber 7, the vibration of the motor 2 is not directly transmitted to the flange 1a (it is damped by the anti-vibration rubber 7). As a result, the vibration to the fixed base 1 is damped,
This results in an anti-vibration effect. In the above embodiment, the cylindrical anti-vibration rubber 7 is arranged such that its longitudinal direction is perpendicular to the rotating shaft 3 of the motor 2 and facing the rotating shaft 3 in two directions, and in two directions perpendicular thereto and facing the rotating shaft 3. Although we have shown an example in which the motors are arranged at four locations in total, as shown in FIG.
The anti-vibration rubber 7 is moved in two directions facing the rotating shaft of the motor 2 and in two directions orthogonal thereto from the same direction.
It may be arranged at any location, and the same effect as in the above embodiment can be obtained. [Effect of the invention] As described above, according to the present invention, the cylindrical anti-vibration rubber
Its longitudinal direction is perpendicular to the motor rotation axis, and
A total of four locations, two directions facing the rotation axis and two directions perpendicular to it, or two directions facing the rotation axis of the motor and two directions perpendicular to it and from the same direction. Since it is configured to be placed in four locations, it is possible to prevent the vibration of the motor from being transmitted to the fixed base and generate noise, and also to prevent displacement of the motor itself. .

[Brief explanation of drawings]

FIG. 1 is a partially sectional side view showing a motor support device according to an embodiment of the invention, FIG. 2 is a perspective view of the same device, and FIG. 3 is a motor support device according to another embodiment of the invention. FIG. 4 is a cross-sectional side view of a vibration-proof rubber, and FIG. 5 is a partially cross-sectional side view showing a conventional motor support device. 1a is a flange, 2 is a motor, 3 is a rotating shaft, and 7 is a vibration-proof rubber. In addition, in the figures, the same reference numerals indicate the same or equivalent parts.

Claims (1)

[Claims] In a motor support device for attaching and supporting a motor to a motor mounting part, the motor is interposed between a side surface of the motor and the motor mounting part to elastically support the motor, and is formed in a cylindrical shape. and has a spring constant that is high in the radial direction and low in the thrust direction, the longitudinal direction of which is perpendicular to the rotational axis of the motor, and two directions facing the rotational axis and two directions perpendicular thereto and opposite to the rotational axis. It is characterized by providing elastic bodies disposed at a total of four locations such that the longitudinal direction thereof faces the rotation axis, or at a total of four locations such that the longitudinal direction is in two directions facing the rotation axis and two directions perpendicular thereto from the same direction. A support device for the motor.