JPH1042513A - Fitting structure for motor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the production of abnormal images caused by the worsening in the parallelism of a drive shaft by inclining the fitting surface of a bracket as against the vertical direction, fitting a motor with the tip of its drive shaft downwards as against the horizontal direction, and preventing the motor from being fitted inclining by its own weight. SOLUTION: A motor 1 is fitted to the frame 2 of a copying machine, etc., through a bracket 10 and vibration-proof material made of rubber dampers 4. At this time, the fitting surface 10a of the bracket 10 is inclined by an angle 'with respect to the vertical direction. Here, rubber dampers 4 of a constant thickness are fitted, and the motor 1 is fitted so that the tip of its drive shaft 1a may be downward with respect to the horizontal direction. The bracket 10 is made out of metal or resin, and α is freely settable freely adjusting it to the kinds of vibration-proof members and the motor 1. As the result, the motor 1 may be prevented from being fitted inclining by its own weight, and the production of abnormal images caused by the worsening in the parallelism of the drive shaft 1a is prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motor mounting structure for driving OA equipment such as a copying machine, and more particularly to a motor mounting structure capable of preventing motor vibration and noise.

[0002]

2. Description of the Related Art FIG. 7 is a view showing a conventional structure for mounting a motor of this type. As shown in FIG.
It is attached to a frame 2 such as a copying machine via a bracket 3 and a rubber damper 4 as a vibration isolating member. The rubber damper 4 is composed of an elliptical rigid body 5 fixed to the vertical mounting surface 3a of the bracket 3, an elliptical rigid body 6 fixing the motor 1, and an elastic body 7 such as rubber interposed therebetween. Become. Since the mounting surface 3a is vertical and the rigid bodies 5 and 6 are parallel, the motor 1 is mounted such that the drive shaft 1a is horizontal.

FIG. 8 shows a motor mounting structure using a plurality of rubber bushes 8 instead of the rubber dampers 4 as vibration damping members. The rubber bush 8 is sandwiched in a screw hole 1c of a mounting portion of the motor 1.

Hitherto, various types of materials using various materials have been proposed as vibration damping members in a motor mounting structure. As examples thereof, those using chloroprene rubber or urethane rubber, rubber hardness of 40 ° to 90 °, and the like have been proposed, and those suitable for vibration-proof characteristics to be prevented can be selected.

[0005]

The motor 1 is mounted on a vertical mounting surface 3a of a bracket 3 via a rubber damper 4 or a rubber bush 8, and the drive shaft 1a of the motor is moved horizontally. When the rubber damper 4 and the rubber bush 8 receive an external force such as vibration and the weight of the motor 1, the rubber bush 8 below and below the rubber damper 4 is greatly compressed, and the drive shaft 1 a of the motor 1 As shown in FIG. 9, the tip is directed upward by the angle θ.

On the other hand, the drive shaft 1a of the motor is provided with gears for transmitting the drive and pulleys for the drive belt.
When the tip of the drive shaft 1a of the motor is directed upward with respect to the horizontal direction as shown in FIG. 9, the parallelism between the drive shaft 1a and the driven shaft (not shown) is lost, and the gear meshing becomes poor. In some cases, the belt rubbed against the brim of the pulley to generate vibrations, resulting in an abnormal image.

The inventor of the present invention deliberately tilts the scanner motor of the color copier and attaches it to the scanner via a rubber damper having a hardness of 65 °, and an abnormal image (colored fine line) is generated by how much the motor tilts. I tried to find out.
Table 1 shows the results.

[0008]

[Table 1]

In this experiment, the motor was rotated about 0.5 °
It was found that thin lines were colored when inclined.
Next, in the same scanner, the rubber hardness of the rubber damper and the inclination angle of the motor were examined. Table 2 shows the results.

[0010]

[Table 2]

From Table 2 above, it can be seen that the smaller the rubber hardness, the greater the motor inclination θ. Of course, the inclination angle θ of the motor varies depending on the shape and rubber type of the rubber damper, the weight and the shape of the motor, and the amount of inclination of the motor at which an abnormal image occurs varies depending on the model. However, as a general theory, noise from motor vibration
When a rubber damper having a small rubber hardness is used as a banding countermeasure, it can be said that there is a high possibility that a side effect of thin line coloring due to the inclination of the motor occurs even though noise can be prevented.

An object of the present invention is to provide an apparatus for horizontally mounting a motor via an anti-vibration member so as to prevent an abnormal image caused by the inclination of the motor due to its own weight and the deterioration of the parallelism of the drive shaft. Another object of the present invention is to enable the use of a vibration-proof rubber having a low rubber hardness.

[0013]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a motor mounted on a vertical mounting surface of a bracket via a vibration isolating member, and a motor mounted on the motor so as to make the drive shaft of the motor horizontal. The structure is characterized in that the motor mounting surface of the bracket is inclined with respect to the vertical direction, and the tip of the drive shaft of the motor is attached downward with respect to the horizontal direction.

Alternatively, in a motor mounting structure in which a motor is mounted on a vertical mounting surface of a bracket via a vibration isolating member and a driving shaft of the motor is made horizontal, the upper and lower thicknesses of the vibration isolating member may be reduced. Alternatively, a configuration in which the tip of the motor drive shaft is attached downward with respect to the horizontal direction may be adopted.

Alternatively, in a motor mounting structure in which a motor is mounted on a vertical mounting surface of a bracket via a vibration isolating member and a drive shaft of the motor is horizontal, the vibration isolating member may be a plurality of rubber bushes, The thickness of the upper rubber bush may be thinner than the thickness of the lower rubber bush of the motor, and the tip of the motor drive shaft may be attached downward with respect to the horizontal direction.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a motor mounting structure according to the present invention will be described below with reference to the drawings. FIG. 1 is an overall schematic view of a motor mounting structure according to the present invention. In FIG. 1, a motor 1 is attached to a frame 2 of a copying machine or the like via a bracket 10 and an anti-vibration member including a rubber damper 4. At this time, the mounting surface 10a of the bracket 10 is inclined by an angle α with respect to the vertical direction.
Here, a rubber damper 4 having a constant thickness is attached so that the tip of the drive shaft 1a of the motor is attached downward with respect to the horizontal direction. The bracket 10 is made of metal or resin, and can freely set the inclination α according to the type of the vibration isolating member or the motor.

FIG. 2 is a view showing a state in which the motor 1 is mounted on the rubber bush 4. The motor 1 deforms the rubber bush 4 as a vibration isolating member by its own weight,
Just rotate. However, as shown in the figure, since the mounting surface 10a of the bracket 10 is inclined by an angle α with respect to the vertical direction, the angle that the drive shaft 1a of the motor 1 makes horizontal is
α−θ.

It is necessary to make α-θ close to 0 °. This angle varies depending on the material and hardness of the vibration isolating member or the shape and weight of the motor to be mounted. However, according to Tables 1 and 2 above, which were experimented by the inventor, it has been found that the inclination angle of the motor is about 0 ° to 2 ° and an abnormal image does not occur if the angle is within 0.5 °. This means that, when the drive shaft 1a is inclined by about 0.8 ° due to the weight of the motor, if the motor mounting surface of the bracket 3 and the device mounting surface have an angle of 1 °, for example,
The inclination α-θ of the motor is 0.2 ° at the tip of the motor drive shaft when the tip falls, which means that it can be set to a level at which an abnormal image does not occur.

Of course, if the inclination of the motor is 0.5 ° or more, an abnormal image does not always occur, and if it is within this angle, it does not mean that an abnormal image will never occur. However, for each motor, there is an area of motor inclination where almost no abnormal image occurs,
What is necessary is just to find the angle. That is, in this embodiment, the angle between the motor mounting surface and the device mounting surface is 0.5 °, 1
By preparing a bracket that changes stepwise, such as in steps of {, 1.5} and 0.5}, it is possible to prevent almost all motors from having an abnormal image due to the inclination of the motor.

FIG. 3 shows an embodiment in which a rubber bush 12 is used as a vibration isolating member in the above-mentioned motor mounting structure.
The rubber bush 12 is used by being sandwiched between the screw holes 1c of the main body mounting portion of the motor 1 and at four corners at four points or
They are arranged at two diagonal points. The angle α at which the mounting surface 10a of the bracket 10 is inclined with respect to the vertical direction is substantially equal to the angle θ (see FIG. 1) at which the rubber bush 12 is deformed and the motor is inclined.

FIG. 4 shows the case where the lengths of the legs of the bracket are different when the mounting surface of the bracket has an angle α inclined with respect to the vertical direction. When the upper leg 10a of the bracket 10 is shorter than the lower leg 10b so that the motor mounting surface 10c has an inclination α, the length difference t between the upper leg 10a and the lower leg 10b is t.
And the distance L between the legs has a relationship of tan (α) = t / L. Therefore, t may be set so as to have a desired value α.

FIG. 5 is an overall schematic diagram showing another embodiment of the present invention. This embodiment is also the same as the embodiment of FIG. 1 in that the motor 1 is mounted on a frame 2 such as a copying machine via a bracket 3 and a vibration isolating member 14. However, in this embodiment, the elastic member 14a of the vibration isolation member 14 is used.
By changing the thickness of the upper side and the lower side, the angle formed between the motor mounting surface 14b and the bracket mounting surface 14c of the vibration isolating member is inclined by α. Thus, when the distal end of the drive shaft 1a of the motor 1 is attached downward by an angle θ with respect to the horizontal direction, the drive shaft 1a rotates by an angle θ and becomes substantially horizontal. And the above angle α
Are prepared in steps of 0.5 °, such as α = 0.5 °, 1 °, 1.5 °,..., So that all the inclinations of the motor can be dealt with.

FIG. 6 is an overall schematic diagram showing another embodiment of the motor mounting structure of the present invention. As shown in FIG. 1A, in this embodiment, rubber bushes 15, 15 'are used as vibration isolating members. Rubber bush 15,
15 ′ is sandwiched between screw holes for mounting the motor 1.
And the thickness t2 of the rubber bush 15 'of the lower fastening portion is changed to make the upper portion thinner, so that the motor 1 is fixed at an angle α. When the thickness difference t at this time, the distance between the upper side and the lower side is L, and the inclination angle is α, tan α
= T / L.

FIG. 6B is a view showing a state in which the rubber bush 15 is deformed by the weight of the motor 1 or the like.
As shown in the drawing, the thickness of the rubber bush 15 is changed so that the motor 1 is inclined by the angle α, so that the lower rubber bush 15 is deformed by the weight of the motor and the like, and the drive shaft 1a of the motor is driven. Is inclined by an angle θ and is almost horizontal (α−
(angle of θ). The rubber bush 15 as an anti-vibration member is set so that the angle α is 0.5 °, 1 °, 1.
If a thickness difference is prepared so as to change in steps of 0.5 °, such as 5 °, all inclinations of the motor can be dealt with. The rubber bush 15 may be provided at four corners or only at two diagonal corners.

[0025]

According to the present invention as described above,
The motor is attached to the bracket via the anti-vibration member,
Since the motor mounting surface of the bracket is inclined, when the motor is mounted, the anti-vibration member is deformed by the weight of the motor and the drive shaft of the motor is directed upward from the horizontal direction, but this offsets the inclination of the motor mounting surface. The drive shaft of the motor is substantially horizontal, so that the parallelism between the drive shaft and the driven shaft on the other side can be maintained, and occurrence of abnormal images and noise can be prevented.

If the anti-vibration member can be inclined instead of inclining the mounting surface of the bracket, the anti-vibration member is deformed by the weight of the motor, and the drive shaft of the motor is rotated upward in the same manner as described above, so as to be substantially horizontal. Can be kept.

[Brief description of the drawings]

FIG. 1 is a view showing an embodiment of a motor mounting structure according to the present invention.

FIGS. 2A and 2B are views showing a state where a motor is attached to the bracket of FIG. 1, wherein FIG. 2A is a front view and FIG. 2B is a side view.

FIG. 3 shows another embodiment of the motor mounting structure of the present invention.
It is a figure which shows the example which used the rubber bush instead of the rubber damper.

FIG. 4 is a diagram for explaining a state in which the length of the legs of the bracket is made different and the mounting surface is inclined.

FIG. 5 is a view showing another example of the present invention in which the thickness of a rubber damper as a vibration isolator is made different.

6A and 6B are diagrams of an embodiment in which the length of a rubber bush is changed in place of a rubber damper, wherein FIG. 6A is a diagram showing a virtual state in which the rubber bush does not lower due to its own weight, and FIG. It is a figure which shows the normal use state which fell.

7A and 7B are views showing a conventional motor mounting structure, and FIG.
Is a side view, and (b) is a front view.

FIGS. 8A and 8B are diagrams of another conventional example showing a motor mounting structure, wherein FIG. 8A is a side view and FIG. 8B is a front view.

9 is a diagram showing a state in which the motor is lowered by its own weight in the conventional example of FIG. 7;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Motor 1a Motor drive shaft 10 Bracket 10a Bracket mounting surface 14 Anti-vibration member (rubber damper) 15 Anti-vibration member (rubber bush)

Claims (3)

[Claims] 1. A motor mounting structure for mounting a motor on a vertical mounting surface of a bracket via a vibration isolating member and making a drive shaft of the motor horizontal, wherein the motor mounting surface of the bracket is inclined with respect to a vertical direction. A motor mounting structure, wherein a tip of a drive shaft of the motor is attached downward to a horizontal surface. 2. A motor mounting structure for mounting a motor on a vertical mounting surface of a bracket via a vibration isolating member and leveling a drive shaft of the motor, wherein the thickness of the upper and lower sides of the vibration isolating member is reduced. A motor mounting structure wherein the tip of the motor drive shaft is attached downward with respect to the horizontal direction. 3. A motor mounting structure for mounting a motor on a vertical mounting surface of a bracket via a vibration isolating member and making a drive shaft of the motor horizontal, wherein the vibration isolating member includes a plurality of rubber bushes. The thickness of the upper rubber bush is smaller than the thickness of the lower rubber bush of the motor, and the end of the motor drive shaft is attached downward with respect to the horizontal direction.