JP2001298897A - Motor fixing structure and driving shaft fixing structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a motor fixing structure which can fix a motor in such a manner that a motor shaft is in parallel with a desired fixing direction to be set, when a force is applied to the motor shaft from the outside. SOLUTION: When a force is not applied to the shaft 10B of a motor 10 from the outside, the shaft 10B is inclined to the desired fixing direction Z. When a force is applied to the shaft 10B by a timing belt 20, and a previously estimated bending moment is applied to the motor 10, a damper 16 is deformed and the shaft 10B becomes in parallel with the direction Z, i.e., rectangular to a trace surface S of the belt 20. As a result, a pulley 14 and the timing belt 20 are situated at normal positions. When the motor 10 rotates, an unbalanced load is not applied to the timing belt 20, so that endurance is improved.

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 in which a load acts on a motor shaft in a direction perpendicular to the shaft, and a drive shaft mounting structure in which a load acts on a drive shaft in a direction perpendicular to the shaft.

[0002]

2. Description of the Related Art Conventionally, when mounting a motor on a mounting portion such as a frame, an elastic member is often interposed between the motor body and the mounting portion as a measure against vibration. For example, in an ink jet printer, a compression coil spring is used as an elastic member (JP-A-8-17135), and in an exposure apparatus, a damper is used as an elastic member. Hereinafter, the prior art will be described using an exposure apparatus as an example.

In a conventional exposure apparatus, a damper 72 as shown in FIG. 9 is used as the above damper. The damper 72 includes a cylindrical damper body 73 and a damper body 7.
3 is composed of an upper holding plate 70 and a lower holding plate 71 bonded to the upper and lower surfaces, respectively.

[0004] As shown in FIG.
2 is interposed between the mounting plate 80 and the motor 76 for rotating the timing belt 74 forward and reverse. Note that FIG.
(A) to (C), in order to clarify the deformation of the damper 72, the upper holding plate and the lower holding plate are omitted.

The shaft 8 of the motor 76 is
2 are formed. Also,
An exposure head (not shown) is attached to the timing belt 74, and the exposure head scans when the timing belt 74 rotates normally and reversely.

To mount the motor 76 on the mounting plate 80,
First, the shaft 82 is passed through the through hole 72H, and a screw (not shown) is inserted into a mounting hole 84 formed in the lower flange 77 of the lower holding plate 71 (see FIG. 9).
Is fixed to the motor 76.

[0007] Next, this is attached to the mounting portion 81 of the mounting plate 80.
(See FIG. 10A), the tip of the shaft 82 is projected outside (upper) from an opening 80A formed in the mounting plate 80 in advance, and further, the upper holding plate 70 (FIG. 9).
Screw (not shown) is inserted through a through hole 85 formed in the upper collar 79 of the mounting plate 80 to attach the damper 72 to the mounting plate 80.
(See FIG. 10A).

Next, a pulley 86 is attached to the tip of the protruding shaft 82 (see FIG. 10B), and a timing belt 74 is wound around the pulley 86 (see FIG. 10C).

However, when a tensile force in the U direction acts on the timing belt 74, a force in the U direction is applied to the shaft 82, and a bending moment acts on the motor 76, so that the shaft 82 moves against the track surface S of the timing belt 74. The motor 76 is mounted on the mounting plate 80 in a state where the motor 76 is not orthogonal and inclined.

When the motor 76 is driven in this state, an eccentric load is applied to the timing belt 74 and stress (internal stress) is partially increased, so that the durability of the timing belt 74 is not good. Load is applied, and so on.

It should be noted that not only the exposure apparatus and the ink jet printer, but also a general mechanism in which a bending moment is applied to the motor by a force externally applied to the motor shaft, the motor may be moved with respect to the set target mounting direction. The shaft is mounted in a non-parallel state,
Similar problems have occurred, such as excessive stress on the mechanism for transmitting the driving force from the shaft and excessive load on the motor. In addition, this problem occurs not only in the case where an elastic body is interposed as an anti-vibration measure but also in a general mechanism that attaches importance to the direction of a motor shaft and further to the direction of a drive shaft.

[0012]

According to the present invention, in consideration of the above fact, the motor is mounted such that the shaft is parallel to the set target mounting direction even when an external force is applied. It is an object to provide a motor mounting structure and a drive shaft mounting structure in which a drive shaft is parallel to a set target mounting direction even when an external force is applied.

[0013]

According to the first aspect of the present invention, in a motor mounting structure in which an elastic member is provided between a motor and a mounting portion to which the motor is mounted, a motor shaft is set in advance. The motor is mounted on the mounted portion via the elastic member so as to have a predetermined angle with respect to a target mounting direction.

When no external force is applied to the motor shaft, the motor shaft is inclined at a predetermined angle with respect to a preset target mounting direction. When a force is applied to the motor shaft by a driving force transmission mechanism such as a timing belt (a mechanism for transmitting the driving force received from the motor shaft), and a bending moment assumed in advance is applied to the motor, the bending force is applied to the elastic member. Then the compression force,
On the side opposite to the bending side, a tensile force acts, and the motor shaft becomes parallel to the target mounting direction. The target mounting direction is set, for example, in a direction perpendicular to the track surface of the timing belt mounted at a regular position. The predetermined angle is determined in advance in consideration of parameters such as the magnitude of the bending moment and the elasticity of the elastic member.

As a result, the driving force transmission mechanism (for example, a timing pulley and a timing belt attached to the motor shaft) is set at a proper position, and when the motor rotates,
There is no partial load on the driving force transmission mechanism,
Also, no excessive load is applied to the motor.

According to a second aspect of the present invention, the angle of the motor shaft at the time of mounting is adjusted by the thickness of the elastic member.

This makes it easy to set the predetermined angle.

According to a third aspect of the present invention, the angle of the motor shaft at the time of mounting is adjusted by an inclination angle of the mounted portion with respect to the target mounting direction.

Thus, even if the elastic member is not provided with an angle, the motor shaft becomes parallel to the target mounting direction when a force acts on the motor shaft, so that the elastic member can be easily formed.

According to a fourth aspect of the present invention, the hardness is changed between the tension side and the compression side of the elastic member when a load is applied to the motor shaft.

Accordingly, even if the force acting on the motor shaft is large, it is not necessary to change the thickness of the elastic member between the tension side and the compression side.

According to a fifth aspect of the present invention, a stopper is provided to contact the housing of the motor to maintain the attitude of the motor shaft on which a moment has acted.

Thus, the motor shaft can be set in the target mounting direction without strictly forming the shape of the elastic member, and the processing of the elastic member becomes extremely easy. Even if the force acting on the motor shaft changes, the direction of the motor shaft can be set to the target mounting direction by adjusting the position of the stopper.

According to a sixth aspect of the present invention, there is provided the drive shaft, a bearing member provided around the drive shaft, and an elastic member supported by an attached portion and abutting on a peripheral edge of the bearing member. The elastic member is provided so that the drive shaft has a predetermined angle with respect to a preset target mounting direction.

As a result, the driving force transmitting mechanism (for example, a timing pulley and a timing belt attached to the driving shaft) is set at a proper position, and the driving force transmitting mechanism is rotated when the driving shaft rotates. There is no partial load applied to the mechanism.

In the invention described in claim 7, the drive shaft is provided with a gear for transmitting the driving force at one end, and a pulley for transmitting the driving force at the other end. It is characterized by the following.

Thus, the belt wrapped around the pulley rotates while the pulley faces the target mounting direction. Therefore, there is no partial load applied to the belt. Further, no excessive load is applied to the gear attached to the drive shaft and the mechanism for transmitting the rotational force to the gear.

[0028]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below by taking an exposure apparatus as an example.

As shown in FIG. 1, in the motor mounting structure 11 according to the first embodiment, a damper 16 is interposed between the motor 10 and a mounting plate 12 on which the motor 10 is mounted. The damper 16 includes a damper main body 23 and an upper holding plate 1 that is bonded to the upper and lower surfaces of the damper main body 23, respectively.
3 and a lower holding plate 15.

The upper holding plate 13 is a back surface 12C of the mounting plate 12.
The lower holding plate 15 is provided on the upper surface 10C of the motor body 10A.
Are in contact with each other. Upper surface 1 of motor body 10A
0C is flat, and the mounting plate 12, the upper holding plate 1
3 and the lower holding plate 15 are both flat. As the material of the damper body 23, rubber is used in the first embodiment, but urethane material or the like may be used as long as it exhibits a damping function.

A motor shaft 10B (hereinafter, simply referred to as a shaft 10B) protrudes upward from an upper surface 10C of the motor body 10A. The damper 16 has a through hole 16H through which the shaft 10B passes.
Further, an opening 12A through which the shaft 10B passes is also provided in a mounting portion 12H of the mounting plate 12 where the motor 10 is mounted.
Are formed.

A pulley 14 is attached to the end of the shaft 10B. After the motor 10 is mounted on the mounting portion 12H, the timing belt 20 is wound around the pulley 14. A tensile force acts on the wound timing belt 20 in the U direction parallel to the track surface S of the timing belt 20. As a result, a force is applied to the shaft 10B in the U direction, a bending moment is applied to the motor 10, and the shaft 10B
It is in a state orthogonal to. The size of the damper body 23 is determined in advance in such a state in consideration of the hardness of the damper 16 as described below.

When no force such as a bending moment is applied to the damper 16, as shown in FIG. 2, the thickness of the damper body 23 on the bending direction side P of the bending moment is smaller than the thickness of the opposite side Q. thin.

The damper body 23 is formed by cutting a cylindrical rubber body, and the upper surface 23F of the damper body in contact with the upper holding plate 13 is a plane perpendicular to the center axis C of the damper material. The lower surface 23G of the damper body that is in contact with the side holding plate 15 is a plane that forms a predetermined angle with respect to the center axis C of the damper material.

An upper collar 30 having a screw hole is formed on the P side and the Q side of the upper holding plate 13. Similarly, a lower collar 32 having a screw hole is formed on the lower holding plate 15. Side and the Q side.

The diameter of the through hole 16H is sufficiently larger than the diameter of the shaft 10B, and the shaft 10B does not contact the inner wall of the through hole 16H in the state shown in FIGS. 1 and 3C.
Also, when the shaft 10B is in the state shown in FIG.
The shape of the through-hole 16H is an ellipse long in the U direction so as to be movable to the state shown in FIG.

In FIGS. 3A to 3C, the damper 1
In order to clarify the deformation of No. 6, the upper holding plate and the lower holding plate are omitted.

Hereinafter, a procedure for mounting the motor 10 on the mounting plate 12 will be described. First, the shaft 10B is passed through the through hole 16H of the damper 16, and the lower holding plate 15 is fixed to the motor 10 with the screw 17 (see FIG. 1). Then, this is transported to the mounting portion 12H, and the tip of the shaft 10B is made to protrude from the opening 12A (see FIG. 3A), and the upper holding plate 13 is attached to the mounting plate by screws 19 (see FIG. 1). 12
Fixed to. In this state, the shaft 10B is inclined at a predetermined angle α (see FIG. 3A) with respect to the target mounting direction Z. The target mounting direction Z is the timing belt 20
Is a direction orthogonal to the orbital surface S.

Next, as shown in FIG. 3B, a pulley 14 is attached to the tip of the shaft 10B.

Further, as shown in FIG.
When the timing belt 20 is wound around the shaft 4, the shaft 1
A force is applied to 0B in the U direction, and a bending moment is applied to the motor 10. As a result, the state where the shaft 10B is parallel to the target mounting direction Z, that is, the state where the shaft 10B is orthogonal to the track surface S is maintained. By driving the motor 10 in this state, the timing belt 20 rotates forward or reverse parallel to the track surface S.

Accordingly, the pulling force generated in the timing belt 20 when the timing belt 20 rotates forward or reverse is
The timing belt 20 is uniform in the direction parallel to the shaft 10B, that is, in the width direction B of the timing belt 20 (see FIG. 3C), and no uneven load is applied to the timing belt 20. Therefore, the durability of the timing belt 20 is improved, and an excessive load is prevented from being applied to the motor 10 when the motor 10 is rotated.

Next, a second embodiment will be described. In the second embodiment, the shape of the mounting plate is devised compared to the first embodiment. In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

As shown in FIG. 4C, in the motor mounting structure 41 according to the second embodiment, the upper surface 10A of the motor body 10A is formed.
A damper 46 is interposed between C and a mounting plate 44 on which the motor 10 is mounted. 4A to 4C,
In order to clarify the deformation of the damper 46, the upper holding plate and the lower holding plate are omitted.

The damper 46 includes a damper body 47 which is cylindrical when no load is applied, and an upper holding plate and a lower holding plate (neither is shown) attached to the upper and lower surfaces of the damper body 47, respectively. Consists of

The damper 46 has a through hole 46H through which the shaft 10B penetrates. The motor mounting portion 44H of the mounting plate 44 has an opening 4H through which the shaft 10B penetrates.
4A are formed.

As shown in FIG. 4C, in the motor mounting structure 41, after the motor 10 is mounted on the mounting plate 44, the pulley 14 is mounted on the tip of the shaft 10B. The belt 20 is wound. Timing belt 2 wrapped around
At 0, a tensile force is applied in the U direction along the raceway surface S.
As a result, a force is applied to the shaft 10B in the U direction,
A bending moment is applied to the motor 10 and the shaft 10
B is orthogonal to the raceway surface S. In consideration of the hardness of the damper 46, the shape of the motor-attached portion 44H is determined in advance in such a state as described below.

That is, the motor mounted portion 44H is a processed portion formed by processing a part of the flat mounting plate 44 by a press or the like, and when the bending moment is not acting on the motor 10, the shaft 10B keeps the track surface. S, the back surface 4 of the motor-attached portion 44H so that the shaft 10B is orthogonal to the raceway surface S when a bending moment acts.
4C is an inclined plane inclined by a predetermined angle β with respect to the raceway surface S.

The surface 44B of the component of the mounting plate 44 that has not been processed by pressing or the like is parallel to the raceway surface S.

Hereinafter, a procedure for mounting the motor 10 on the mounting plate 44 will be described. First, the shaft 10B is passed through the through hole 46H of the damper 46, and the damper 46 is fixed to the motor 10 with screws (not shown). Then, this is transported to the motor mounting portion 44H, and the shaft 10B is
4A (see FIG. 4A), and is further fixed to the mounting plate 44 by screws (not shown). In this state, the shaft 10B is inclined at a predetermined angle β with respect to the target mounting direction Z. The target mounting direction Z is a direction orthogonal to the raceway surface S.

Next, as shown in FIG. 4B, a pulley 14 is attached to the tip of the shaft 10B.

Further, as shown in FIG.
When the timing belt 20 is wound around the shaft 4, the shaft 1
A force is applied to 0B in the U direction, and a bending moment is applied to the motor 10. As a result, the shaft 10B is in a state parallel to the target mounting direction Z, that is, a state perpendicular to the raceway surface S, and this state is maintained. Therefore, the timing belt 20 rotates forward or reverse parallel to the raceway surface S.

Thus, the same effects as in the first embodiment can be obtained. Further, since the cylindrical damper body 47 can be used as it is, the manufacture of the damper 46 is easy.

Next, a third embodiment will be described. FIG.
As shown in (C), the motor mounting structure 5 according to the third embodiment
In FIG. 1, a mounting portion 54H for mounting the motor 10 is a plate-like member connected to the mounting plate 54 by one end 52 at a hinge 55, and a damper 5 is provided between the other end 53 and a holding plate 57.
6 is interposed. The attached portion 54H includes a shaft 10
An opening 54A through which B penetrates is formed.

As shown in FIG. 5C, in this motor mounting structure 51, after the motor 10 is mounted on the mounting portion 54H, the pulley 14 is mounted on the tip of the shaft 10B. Timing belt 20
Is wrapped around. A tensile force is applied to the wound timing belt 20 in the U direction along the track surface S. As a result, a force is applied to the shaft 10B in the U direction, a bending moment is applied to the motor 10, and the shaft 10B is in a state orthogonal to the raceway surface S. Considering the hardness of the damper 56,
The dimensions of the damper 56 are determined in advance.

That is, when the bending moment is not acting on the motor 10, the shaft 10B is inclined with respect to the raceway surface S. When the bending moment is acting, the damper is moved so that the shaft 10B is orthogonal to the raceway surface S. 56
Are determined. The mounting plate 54 is parallel to the raceway surface S.

The procedure for attaching the motor 10 to the attached portion 54H hinged to the attachment plate 54 will be described below. First, the damper 56 is pasted on the upper surface of the other end 53 of the mounted portion 54H.

Next, the shaft 10B is passed through the opening 54A (see FIG. 5A), and the motor 10 is fixed to the mounting portion 54H by screws (not shown). In this state, the shaft 10B is inclined at a predetermined angle δ with respect to the target mounting direction Z. The target mounting direction Z is a direction orthogonal to the raceway surface S.

Next, as shown in FIG. 5B, a pulley 14 is attached to the tip of the shaft 10B.

Further, as shown in FIG.
When the timing belt 20 is wound around the shaft 4, the shaft 1
A force is applied to 0B in the U direction, and a bending moment is applied to the motor 10. As a result, the shaft 10B is in a state parallel to the target mounting direction Z, that is, a state perpendicular to the raceway surface S, and this state is maintained. Therefore, the timing belt 20 rotates forward or reverse parallel to the raceway surface S.

As a result, no uneven load is applied to the timing belt 20.
Is improved, and an excessive load is prevented from being applied to the motor 10 when the motor 10 is rotated. Further, since it is not necessary to form a through hole in the damper 56 and the shape of the damper 56 is simple, the manufacture of the damper 56 is easy.

Next, a fourth embodiment will be described. FIG.
As shown in (B), the motor mounting structure 6 according to the fourth embodiment
At 0, the mounting portion 62 to which the motor 10 is mounted has an L-shaped cross section. The attached portion 62 is formed, for example, by pressing a flat plate 68. Then, a damper 64 is provided on the side surface 10E of the motor 10,
A damper 66 is provided on the bottom surface 10D of the
And between.

After the motor 10 is disposed on the mounting portion 62, the pulley 14 attached to the tip of the shaft 10B
Is wound around the timing belt 20. A tensile force acts on the wound timing belt 20 in the U direction along the raceway surface S, a force is applied to the shaft 10B in the U direction, a bending moment is applied to the motor 10, and the shaft 10B Orthogonal to S. In order to achieve such a state, the shape of each of the dampers 64 and 66 (FIG. 6) is taken into account in consideration of the dimensions of the motor 10 and the hardness of the dampers 64 and 66.
(See (A)) is determined in advance.

Hereinafter, a procedure for attaching the motor 10 to the attached portion 62 will be described. First, as shown in FIG. 6A, the shaft 10B with the pulley 14 attached to the tip is transported to the mounting portion 62, and the side surface 10A of the motor main body 10A is moved.
E is disposed so as to be in contact with the side surface 64A of the damper 64, and the bottom surface 10D of the motor main body 10A is in contact with the upper surface 66A of the damper 66. In this state, the shaft 10B is inclined at a predetermined angle γ with respect to the target mounting direction Z. The target mounting direction Z is a direction orthogonal to the raceway surface S.

Next, as shown in FIG. 6B, the timing belt 20 is wound around the pulley 14. As a result,
A force is applied to the shaft 10B in the U direction to apply a bending moment to the motor 10, and the state where the shaft 10B is parallel to the target mounting direction Z, that is, the state where the shaft 10B is orthogonal to the track surface S is maintained. By driving the motor 10 in this state, the timing belt 20 rotates forward or reverse parallel to the track surface S.

Thus, effects similar to those of the first embodiment can be obtained. In the fourth embodiment, as shown in FIG. 6B, the upper surface 10C of the motor main body 10A and the mounting portion 6
This is a very effective embodiment in the case where a motor mounting structure in which no damper 66 is provided between the motor 2 and the motor 2 is desired.

Next, a fifth embodiment will be described. FIG.
As shown in (C), the motor mounting structure 6 according to the fifth embodiment
7, a stopper 67S for maintaining the posture of the motor 10 is provided as compared with the first embodiment, and a damper 67D interposed between the motor 10 and the mounting plate 12 is compared with the damper 16 described in the first embodiment. , Q side (the side facing the bending direction side of the bending moment acting on the damper) is slightly thin. As in the first embodiment, in FIGS.
In order to clarify the deformation of the damper, only the damper body is illustrated as the damper.

The stopper 67S is connected to the timing belt 20.
Is the pulley 1 of the shaft 10B (motor shaft 10B)
4, the housing 10H of the motor 10
Abuts against the stopper 67S, and the shaft 10B
Is provided at a position that is orthogonal to. The stopper 67S and the mounting plate 12 are in a non-contact state, so that the vibration transmitted to the stopper 67S is not transmitted to the mounting plate 12.

The procedure for mounting the motor 10 on the mounting plate 12 will be described below. First, as in the first embodiment, the tip of the shaft 10B is made to protrude from the opening 12A. In this state, the shaft 10B is inclined at a predetermined angle ε (see FIG. 7A) with respect to the target mounting direction Z.

Next, as shown in FIG. 7B, a pulley 14 is attached to the tip of the shaft 10B.

Further, as shown in FIG.
When the timing belt 20 is wound around the shaft 4, the shaft 1
A force is applied to 0B in the U direction, and a bending moment is applied to the motor 10. As a result, the housing 10H of the motor 10 comes into contact with the stopper 67S, and the state where the shaft 10B is parallel to the target mounting direction Z, that is, the state where the shaft 10B is orthogonal to the track surface S is maintained. By driving the motor 10 in this state, the timing belt 20 rotates forward or reverse parallel to the track surface S.

Thus, the same effect as in the first embodiment can be obtained. Also, even if the processing accuracy of the damper 67D is somewhat coarse,
Since the stopper 67S performs an auxiliary function and the direction of the shaft 10B is set in the target mounting direction Z, the manufacture of the damper 67D is easy.

The shape of the stopper 67S is not particularly limited. For example, it may be flat or U-shaped.

Next, a sixth embodiment will be described. FIG.
As shown in (C), the drive shaft mounting structure 6 according to the sixth embodiment
9 is provided with a drive shaft 69T passed through an opening 69A of the mounting plate 12 (an opening slightly larger in size than the opening 12A described in the first embodiment). The upper end of the drive shaft 69T,
A pulley 14 and a gear 15 are attached to the lower end, respectively, and a bearing member 69B that rotatably holds the drive shaft 69T is provided.

The drive shaft mounting structure 69 is provided with a damper 69D interposed between the bearing member 69B and the opening edge of the opening 69A.

The gear 69G attached to the shaft 10B of the motor 10 is engaged with the gear 15, and the motor body 10A is moved so that the motor 10 is not moved by the pressing force transmitted from the gear 15. Is fixed at a set position by a fixing member (not shown) or the like. Therefore, even if a moment is applied to the drive shaft 69T by the pulling force in the U direction from the timing belt 20, the gear 69G functions as a stopper.

As described above, the pulling force from the timing belt 20 and the supporting force by the gear 69G cause the drive shaft 6 to rotate.
In consideration of the tensile force by the timing belt 20 and the hardness of the damper 69D, 9T is oriented in the target mounting direction Z and perpendicular to the raceway surface S of the timing belt 20.
The size of the opening 69A and the size of the damper 69D are determined.

The procedure for mounting the drive shaft 69T will be described below. As shown in FIG. 8A, first, a damper 69D and a bearing member 69B are provided in the opening 69A, and the drive shaft 69T having the gear 15 attached to the lower end is inserted through the bearing 69B from the tip. It protrudes from the opening 12A. In this state, the drive shaft 69T is inclined at a predetermined angle に 対 し て with respect to the target mounting direction Z.

Next, as shown in FIG. 8B, the pulley 14 is attached to the upper end of the drive shaft 69T.

Further, as shown in FIG.
When the timing belt 20 is wound around the
When a force is applied to T in the U direction, a bending moment is applied. As a result, the gear 15 comes into contact with the gear 69G, and the state where the drive shaft 69T is parallel to the target mounting direction Z, that is, the state where the drive shaft 69T is orthogonal to the track surface S is maintained. By driving the motor 10 in this state, the timing belt 2
0 rotates forward or reverse parallel to the raceway surface S.

Thus, when the timing belt 20 is wound around the pulley 14, the state in which the shaft 10B is parallel to the target mounting direction Z, that is, the state in which the shaft 10B is orthogonal to the track surface S is maintained, and the motor 10 is driven in this state. By doing so, the timing belt 20 rotates forward or reverse parallel to the raceway surface S. Therefore, the durability of the timing belt 20 is improved, and an excessive load is prevented from being applied to the motor 10.

In the above description, the exposure apparatus is taken as an example, but it goes without saying that the present invention is not limited to the exposure apparatus. It is also conceivable to use a wire or a steel belt instead of the timing belt.

[0082]

According to the present invention having the above-described configuration, the following effects can be obtained.

According to the first aspect of the present invention, the driving force transmission mechanism is located at a proper position, and the driving force transmission mechanism is not partially biased when the motor is rotating. There is no excessive load.

According to the second aspect of the present invention, the angle can be easily set.

According to the third aspect of the present invention, even if the force acting on the motor shaft is large, it is not necessary to largely change the inclination angle of the elastic member.

According to the fourth aspect of the present invention, even when the elastic member is not provided with an angle, the motor shaft becomes parallel to the target mounting direction when a force acts on the motor shaft. Is easy to form.

According to the fifth aspect of the present invention, the motor shaft can be set in the target mounting direction without strictly forming the shape of the elastic member, and the processing of the elastic member becomes extremely easy. Even if the force acting on the motor shaft changes, the direction of the motor shaft can be set to the target mounting direction by adjusting the position of the stopper.

According to the sixth aspect of the present invention, the driving force transmitting mechanism (for example, the timing pulley and the timing belt attached to the driving shaft) is set at a proper position, and the driving force transmitting mechanism is rotated when the driving shaft rotates. There is no partial load.

According to the seventh aspect of the present invention, the belt on the pulley rotates while the pulley faces in the target mounting direction. Therefore, there is no partial load applied to the belt. Further, no excessive load is applied to the gear attached to the drive shaft and the mechanism for transmitting the rotational force to the gear.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a motor mounting structure according to a first embodiment.

FIG. 2 is a perspective view of a damper used in the motor mounting structure according to the first embodiment.

3 (A) to 3 (C) are front views for respective steps showing a procedure for mounting a motor to a mounting plate via a damper in the first embodiment, and FIG. This shows a state in which the timing belt is wound. The damper is drawn conceptually.

4 (A) to 4 (C) are front views for respective steps showing a procedure for mounting a motor to a mounting plate via a damper in a second embodiment, and FIG. This shows a state in which the timing belt is wound. The damper is drawn conceptually.

5 (A) to 5 (C) are front views for respective steps showing a procedure for mounting a motor in a third embodiment, and FIG. 5 (C) shows a state in which a timing belt is wound. Is shown.

FIGS. 6A and 6B are front views for each step showing a procedure for attaching a motor to a mounting plate via a damper according to a fourth embodiment, and FIG. This shows a state in which the timing belt is wound. The damper is drawn conceptually.

FIGS. 7 (A) to 7 (C) are front views for respective steps showing a procedure for mounting a motor to a mounting plate via a damper in a fifth embodiment, and FIGS. This shows a state in which the timing belt is wound. The damper is drawn conceptually.

8 (A) to 8 (C) are front views for respective steps showing a procedure for attaching a drive shaft via a damper in a sixth embodiment, and FIG. 8 (C) shows a timing belt. Indicates a state in which is wound.

FIG. 9 is a perspective view of a damper used in a conventional motor mounting structure.

FIGS. 10A to 10C are front views for respective steps showing a conventional procedure for attaching a motor to a mounting plate via a damper. The damper is drawn conceptually.

[Explanation of symbols]

 Reference Signs List 10 motor 10B motor shaft 10H housing 11 motor mounting structure 12H mounting portion 14 pulley 15 gear 16 damper (elastic member) 41 motor mounting structure 44H motor mounting portion 46 damper (elastic member) 51 motor mounting structure 54H mounting portion 56 damper (Elastic member) 60 Motor mounting structure 62 Mounted portion 64 Damper (elastic member) 66 Damper (elastic member) 67 Motor mounting structure 67D Damper (elastic member) 67S Stopper 69 Drive shaft mounting structure 69B Bearing member 69D Damper (elastic member) 69T drive shaft 72 damper (elastic member) 76 motor 81 mounting part 82 shaft (motor shaft)

Claims (7)

[Claims] 1. A motor mounting structure in which an elastic member is provided between a motor and a mounting portion to which the motor is mounted, wherein a motor shaft has a predetermined angle with respect to a predetermined target mounting direction. A motor mounting structure, wherein the motor is mounted on the mounted portion via the elastic member. 2. An angle of the motor shaft at the time of mounting is:
The motor mounting structure according to claim 1, wherein the motor mounting structure is adjusted by a thickness of the elastic member. 3. An angle of the motor shaft at the time of mounting is:
The motor mounting structure according to claim 1, wherein the motor mounting structure is adjusted by an inclination angle of the mounted portion with respect to the target mounting direction. 4. The motor mounting structure according to claim 2, wherein a hardness is changed between a tension side and a compression side of the elastic member when a load is applied to the motor shaft. 5. The motor according to claim 1, wherein a stopper is provided to abut on a housing of the motor to maintain a posture of the motor shaft to which a moment has been applied. Motor mounting structure. 6. A drive shaft, a bearing member provided around the drive shaft, and an elastic member supported by an attached portion and abutting on a peripheral edge of the bearing member, wherein the elastic member includes a drive shaft. Is provided so as to have a predetermined angle with respect to a preset target mounting direction. 7. The drive shaft, wherein a gear for transmitting a driving force is provided at one end, and a pulley for transmitting the driving force is provided at the other end. 7. The drive shaft mounting structure according to 6.