JPH0735216A - Torque transmission device and delivery device - Google Patents

Abstract

PURPOSE:To provide a torque transmission device which does not cause vibration when rotating force is transmitted and does not cause deterioration such as wear in a rotating force transmission means. CONSTITUTION:A plurality of rotatable polarising rotors 8 in which a polarising section is formed at a predetermined pitch in an outer peripheral section of the cylindrical rotors or polarising rotors 8 to which a rotatable magnetic rotor composed of magnetic materials is added are arranged in the condition in which they are not in contact, but attracted toward each other by magnetic force so that rotating force is transmitted from the rotor 8 on one side to the rotor 8 on the other side.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a torque transmission device for transmitting a rotational force from a rotation source or the like from one to the other, and a feeding device using this torque transmission device.

[0002]

2. Description of the Related Art Conventionally, as a torque transmission device for transmitting a rotational force from a rotation source or the like, a device using a gear or a friction wheel has been widely used as a rotational force transmission means.

[0003]

However, a torque transmission device using gears has a drawback that vibration is generated due to backlash or the like when the gears are engaged with each other, and the vibrations are transmitted together with the rotational force. In addition, the torque transmission device using gears has a problem that the gears deteriorate due to wear or the like during long-time use, and the rotational force on the drive source side cannot be accurately transmitted.

Further, even in a torque transmission device using a friction wheel, there is a problem that the friction wheel deteriorates due to wear or the like after long-term use, and the torque on the drive source side cannot be accurately transmitted.

Further, when a ball screw or the like is attached to the output shaft of a torque transmission device using a gear or a friction wheel to construct a feeder for manufacturing an optical disc master, for example, the feeding accuracy is the vibration between the gears and the gear. There was a problem that it was affected by the deterioration of the friction car. For this reason, there is a problem in that the feeding device does not perform feeding with high precision and a high-precision master disc cannot be manufactured.

In view of the above points, the present invention provides a torque transmission device that does not cause vibration when transmitting a rotational force, and does not cause deterioration of the rotational force transmission means such as wear and the like, and a torque transmission device thereof. The purpose is to provide a highly accurate feeding device used.

[0007]

According to the present invention, the above object is to provide a plurality of magnetized rotors having magnetized portions formed on the outer peripheral portion thereof at a predetermined pitch, or a magnetized rotor and a magnetic material. It is achieved by a torque transmission device configured to transmit the rotational force from one rotating body side to the other rotating body side by arranging the magnetic rotating body formed in 1 above in a non-contact manner.

Preferably, the size of the gap between the rotating bodies is adjustable. Further, another rotating body may be arranged so as to sandwich the rotating body with respect to the rotating body.

Further, the rotary body and the rotary body sandwiching the rotary body may be moved between an array position which is a drive position and a non-array position which is a non-drive position.

Further, according to the present invention, the above object is formed by a plurality of magnetized rotating bodies having magnetized portions formed at a predetermined pitch on the outer peripheral portion, or formed by a magnetized rotating body and a magnetic material. And a magnetic rotating body arranged in a non-contact manner to transmit a rotational force from one rotating body side to the other rotating body side, and a feed screw attached to the output shaft of this torque transmitting device. This can also be achieved by a master code cutter feeding device having a moving means for moving the laser light generating means in the radial direction of the substrate for manufacturing an optical disk master by rotating the feeding screw.

[0011]

According to the above construction, when one of the magnetized rotating bodies rotates, the other adjacent magnetized rotating body also rotates.
And, even when one is a magnetized rotary body and the other is a magnetic rotary body, this has the same effect.

In this case, since these rotating bodies are arranged in a non-contact state, vibration and wear do not occur when transmitting the rotational force. Further, if the size of the gap between the rotating bodies can be adjusted, the size of the rotational force transmitted by this torque transmission device can be changed.

Further, if the input and output rotary members of the rotary member are arranged so as to sandwich the rotary member, the force generated by the input rotary member and the output rotary member are generated. The forces cancel out, and no radial load acts on the shaft of this rotating body.

With respect to the input-side and output-side rotating bodies, if the rotating body disposed between these rotating bodies is moved between the driving position and the non-driving position, this rotating body serves as a clutch mechanism. Can be configured.

Further, according to the above construction, the moving means is moved accurately by the torque transmitting device via the feed screw. Therefore, the laser generating means is accurately fed in the radial direction of the rotating substrate for manufacturing the master of the optical disc. Therefore, a high-precision master for an optical disc is manufactured on this rotating substrate.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described in detail below with reference to FIGS. It should be noted that the examples described below are suitable specific examples of the present invention, and therefore, various technically preferable limitations are given, but the scope of the present invention particularly limits the present invention in the following description. Unless otherwise stated, the present invention is not limited to these modes.

FIG. 1 is a perspective view of a torque transmission device according to this embodiment, and FIG. 2 is a front view of the torque transmission device around a magnetized cylinder. The torque transmission device 11 is a drive motor 1
A fixed base 2, a movable base 3, an air actuator 4, an intermediate shaft 5, an idler shaft 6, an output shaft 7,
The magnetizing cylinder 8 is provided.

The drive motor 1 is fixed on the first support portion 2a of the horizontal fixed base 2 with the motor shaft 1a oriented in the front-rear direction A. On the side of this drive motor 1,
A movable base 3 that is movable in the vertical direction B with respect to the fixed base 2 is arranged. The moving base 3 can be moved in the vertical direction B by a predetermined amount by an air actuator 4.

The moving base 3 has a pair of supporting portions 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3a, 3b on the right and left sides in the left-right direction C.
3b and 3b are formed upward. The intermediate shaft 5 is rotatably supported in the front-rear direction A between the support portions 3a. An idler shaft 6 is rotatably supported in the front-rear direction A between the support portions 3b and 3b. The output shaft 7 is rotatable along the front-rear direction A at the intermediate position between the intermediate shaft 5 and the idler shaft 6 between the second support portion 2b of the fixed base 2 and a support portion (not shown) which is paired with the second support portion 2b. Supported by.

As shown in FIG. 2, each of the motor shaft 1a, the intermediate shaft 5, the idler shaft 6 and the output shaft 7 serves as a magnetized rotating body in which a magnetized portion 8a is formed on the outer peripheral portion at a predetermined pitch. A plurality of magnetized cylinders 8 are attached. That is, the motor shaft 1a has an input magnetized cylinder 8A, the intermediate shaft 5 has an intermediate magnetized cylinder 8B, the idler shaft 6 has an idler magnetized cylinder 8C, and the output shaft 7 has an output magnetized cylinder 8D. It is installed.

These magnetized cylinders 8A, 8B, 8C, 8D
Are arranged such that they have the same outer diameter but the same thickness and are in non-contact with each other to form the same plane.
The input magnetizing cylinder 8A is the other magnetizing cylinders 8B, 8C, 8D.
It has a sufficiently large diameter compared to.

Here, when the moving base 3 is raised and the intermediate magnetized cylinder 8B and the idler magnetized cylinder 8C are in the drive position B, the motor shaft 1a, the intermediate shaft 5, the idler shaft 6 and the output shaft 7 are each axis. Are arranged on the same level. This causes each cylinder to be in the drive position. Therefore, the intermediate magnetized cylinder 8B
Is sandwiched between the input magnetized cylinder 8A and the output magnetized cylinder 8D, and the output magnetized cylinder 8D is the intermediate magnetized cylinder 8B.
And the idler magnetized cylinder 8C is sandwiched.

When the moving base 3 is lowered and the intermediate magnetizing cylinder 8B and the idler magnetizing cylinder 8C are in the non-driving position (b), the intermediate shaft 5 and the idler shaft 6 are not enough for the motor shaft 1a and the output shaft 7. Positioned downwards. Therefore, in this case, the intermediate magnetized cylinder 8B and the idler magnetized cylinder 8C are arranged at positions sufficiently separated from the input magnetized cylinder 8A and the output magnetized cylinder 8D, which are non-driving positions.

Further, when the intermediate magnetized cylinder 8B and the idler magnetized cylinder 8C are in the driving position B, the sizes of the gaps V at the closest points between the four magnetized cylinders 8 are set to be equal to each other. However, the size of the gap V can be adjusted by a control device (not shown). That is, the drive motor 1 is movable in the left-right direction B with respect to the fixed base 2, and the intermediate shaft 5 and the idler shaft 6 are movable in the direction of arrow C with respect to the moving base 3.

Next, details of the magnetizing cylinder 8 will be described. 3 is a front view of the magnetizing cylinder, FIG. 4 is a side sectional view of the magnetizing cylinder, FIG. 5 is a view showing the orientation of the magnetic poles of the magnetizing portion, FIGS.
FIG. 4 is a diagram showing the directions of magnetic poles of adjacent magnetized cylinders.

The magnetized cylinder 8 is a thin cylindrical body 80 made of, for example, SUS303, S45C, or plastic which is non-magnetic and has good workability, and a predetermined pitch (equal pitch P in this case) on the outer peripheral surface side of the cylindrical body 80. ) And the permanent magnet 81 attached by ().

In this case, the permanent magnet 81 is attached to the outer peripheral surface side of the cylindrical body 80 so as to be fitted tightly in the peripheral groove 80a formed at the equal pitch P in the axial direction L. In this case, the permanent magnet 81 in the circumferential groove 80a
Forms a magnetized portion 8a of the magnetized cylinder 8. A support member for mounting on the shaft is mounted in the hole 80b of the cylindrical body 80.

The direction of the magnetic pole of the permanent magnet 81 is the cylindrical body 80.
The N poles and the S poles are arranged alternately in the radial direction of. That is, as shown in FIG. 5A, the permanent magnet 81 has an S pole on the center side and an N pole on the outside, and an N pole on the center side and an S pole on the outside. The poles are arranged alternately with those arranged. Also, FIG.
In (b), the permanent magnet 81 has an S pole on the center side and an N pole on the outer side. In FIG. 5C, the permanent magnet 81 has an N pole on the center side and an S pole on the outside.

On the other hand, the adjacent magnetized cylinders 8 must be attracted to each other by magnetic force. For this reason, as shown in FIG. 6, when the magnetic poles of the magnetized portions 8a of one magnetized cylinder 8 are of alternating shape, the magnetic poles of the magnetized portions 8a of the adjacent magnetized cylinders 8 also alternate. Make up into shape. Then, in this case, the magnetized cylinders 8 are made to face each other so that the N poles and the S poles of the outer sides of the adjacent magnetized cylinders 8 face each other.

Further, as shown in FIG. 7, when the magnetic poles of the magnetized portions 8a of one magnetized cylinder 8 are outward N-pole type, the magnetized portions 8a of the magnetized cylinders 8 adjacent to each other are magnetized. The direction of the magnetic pole is the outer S pole shape.

By the way, the magnetized portions 8a at the closest points of the adjacent magnetized cylinders 8 must be accurately opposed to each other without causing displacement even when the magnetized cylinders 8 rotate. Therefore, the pitches of the magnetized portions 8a of the adjacent magnetized cylinders 8 are made to correspond to each other accurately. Therefore, for example, the error in the groove width of the circumferential groove 80a of the cylindrical body 80 needs to be suppressed to plus or minus 100 μm or less on one side, for example.

Next, the operation of the torque transmission device 11 will be described. When the drive motor 1 rotates at a constant speed, the input magnetized cylinder 8A also rotates at the same speed via the motor shaft 1a. Subsequently, the moving base 3 is raised by a predetermined amount by the air actuator 4, and the intermediate magnetized cylinder 8B and the idler magnetized cylinder 8C are raised to the drive position B. As a result, the intermediate magnetizing cylinder 8B, the input magnetizing cylinder 8
A, the output magnetizing cylinder 8D, the idler magnetizing cylinder 8C, and the output magnetizing cylinder 8D are positioned so that a magnetic force can be sufficiently exerted (driving position).

The input magnetizing cylinder 8A and the intermediate magnetizing cylinder 8B attract each other by magnetic forces between their corresponding magnetizing portions 8a, so that the intermediate magnetizing cylinder 8B rotates together with the rotation of the input magnetizing cylinder 8A. Rotate. Similarly, as the intermediate magnetized cylinder 8B rotates, the output magnetized cylinder 8D also rotates in the direction of the arrow.
Further, the idler magnetized cylinder 8C rotates as the output magnetized cylinder 8D rotates. Since the diameter of the input magnetized cylinder 8A is larger than the diameter of the intermediate magnetized cylinder 8B and the output magnetized cylinder 8D,
The output shaft 7 rotates at a higher speed than the rotation speed of the drive motor 1.

In this case, in this torque transmission device 11,
Since the input magnetized cylinder 8A, the intermediate magnetized cylinder 8B, the output magnetized cylinder 8D, etc., which are torque transmitting means, transmit torque to the output shaft 7 in a non-contact state with each other, this output shaft 7 A highly accurate rotational force that is not disturbed by vibration or the like is transmitted to.

That is, in the case of a contact type torque transmitting device in which the rotational force transmitting means is composed of gears and friction wheels, vibration is generated at the time of meshing the gears, and wear or deterioration of the gears or the friction wheels causes deterioration in accuracy. Although the torque cannot be transmitted well, this non-contact type torque transmitting device 11 does not cause such inconvenience.

The intermediate magnetizing cylinder 8B and the output magnetizing cylinder 8D are arranged so as to be sandwiched between the other magnetizing cylinders.
Therefore, the radial loads applied to these rotary shafts are offset, and smooth rotation occurs. Therefore, the idler magnetized cylinder 8C does not transmit the rotational force, but contributes to the reduction of such a radial load.

Therefore, in this torque transmission device 11, since the radial load on the intermediate shaft 5 and the output shaft 7 is offset, the rotational force can be transmitted with high accuracy. Also,
The life of the device is also extended. An idler magnetizing cylinder 8C may be similarly provided on the input magnetizing cylinder 8A side.
By the way, even in the case of a contact type torque transmission device that uses gears or friction wheels, similar radial loads act on the gear shaft and friction axle, but this contact type torque transmission device cancels this radial load. Absent.

Next, when the torque transmission device 11 does not need to transmit the rotational force to the output shaft 7 side, the moving base 3 is lowered by a predetermined amount by the air actuator 4, and the intermediate magnetizing cylinder 8B and the idler are attached. The magnetic cylinder 8C is positioned at the non-driving position B. As a result, the intermediate magnetized cylinder 8
Since B is separated from the input magnetized cylinder 8A and the output magnetized cylinder 8D, the transmission of the rotational force from the input magnetized cylinder 8A side to the output magnetized cylinder 8D side is immediately stopped. If it is necessary to transmit the rotational force to the output shaft 7, the moving base 3 may be raised and the intermediate magnetized cylinder 8B and the idler magnetized cylinder 8C may be raised to the drive position B.

As described above, in this torque transmission device 11, the intermediate magnetized cylinder 8B between the input magnetized cylinder 8A and the output magnetized cylinder 8D is moved between the drive position a and the non-drive position b to input the input magnetized cylinder 8B. A clutch mechanism from the output side to the output side is configured. In this case, since the intermediate magnetized cylinder 8B is moved in and out of the input magnetized cylinder 8A and the output magnetized cylinder 8D in a non-contact state, the clutch can be smoothly engaged and disengaged, and switching can be reliably performed.

When it is desired to transmit a larger rotational force from the drive motor 1 to the output shaft 7 side, the control mechanism
The drive motor 1 and the intermediate shaft 5 are moved to the output shaft 7 side, and the idler shaft 6 is moved to the output shaft 7 side. This allows
The size of the gap V at the closest point between the four magnetized cylinders 8A, 8B, 8C, 8D becomes small.
A, 8B, 8C and 8D are attracted to each other by a larger magnetic force.

Therefore, a large rotational force from the drive motor 1 can be transmitted to the output shaft 7 side by the four magnetized cylinders 8A, 8B, 8C and 8D. In this case, the idler magnetized cylinder 8C does not transmit the rotational force, but acts to cancel the radial load applied to the output shaft 7.

As described above, in the torque transmission device 11, the output magnetizing cylinder 8D is centered on the other magnetizing cylinders 8A and 8A.
B and 8C are moved, and the gap V at the closest point between the magnetized cylinders 8
The magnitude of the rotational force that can be transmitted can be easily controlled by changing the magnitude of.

In the above description, only the magnetized cylinder 8 is used as the torque transmission means of the torque transmission device 11, but the magnetic cylinder 9 as a magnetic rotating body made of a magnetic material (see FIG. 8). ) Can also be used. The magnetic cylinder 9 has the same shape as the cylindrical body 8a of the magnetizing cylinder 8, and as shown in FIGS. 8A and 8B, the convex portion 9a formed on the outer circumference is magnetized. The magnetized portion 8a of 8 is made to face. The magnetic cylinder 9 is always combined with the magnetized cylinder 8 because of the magnetic force.

Further, the structure of the clutch mechanism of the torque transmission device 11 may be as shown in FIG.
That is, in this clutch mechanism, one end is the motor shaft 1
The intermediate shaft 5 is rotatably supported by the other end of the swinging member 10 which is rotatably supported by a. Then, the swinging member 10 is made to be rotatable about the motor shaft 1a by a rotating means (not shown).

By rotating the rocking member 10, the intermediate magnetized cylinder 8B can easily reciprocate between the drive position C and the non-drive position D, and the intermediate magnetized cylinder 8B constitutes a clutch mechanism.

Further, in this torque transmission device 11, the magnetized cylinder 8 is made to have a magnetic force by using a permanent magnet 8b which is a separate body from this cylinder, but a direct cylinder is used without using the permanent magnet 8b which is a separate body. You may make it magnetically give a magnetic force to the material which comprises. That is, the magnetizing cylinder 8 may be made of a magnetic material, and the outer peripheral portion of the magnetizing cylinder 8 may be magnetized in multiple poles at a predetermined pitch.

Next, an optical disk master (master) in which a feed mechanism is constituted by the torque transmission device 11 and the like.
The master code cutter for manufacturing will be described. FIG. 10 is a perspective view of the master cord cutter.

In the figure, reference numeral 20 is a device base long in the front-rear direction D. On one end side of the device base 20,
The torque transmission device 11 is positioned and a spindle 21 that rotates at a constant speed is provided on the other end side.

A ball screw 22 as a feed screw is attached to the output shaft 7 of the torque transmission device 11 in a state of extending forward. A slide member 23, which is guided and supported by a guide base 24 on the apparatus base 20, is attached to the ball screw 22 in a screwed state.

At the position of the front end of the slide member 23 facing the upper side of the spindle 21, a laser beam machine 25 as a laser beam generating means for emitting a laser beam L downward is attached in the figure. On the spindle 21, a stamper glass 26, which is a rotating substrate for making an optical disk master, is supported. A photoresist having a predetermined thickness is applied on the stamper glass 26.

Next, the operation of this master cord cutter will be described. With the rotation of the spindle 21, the stamper glass 26 is also rotated at a constant speed. Then, a predetermined laser light L is emitted from the laser processing device 25 onto the photoresist of the stamper glass 26. Then, this photoresist is exposed by the laser beam L. In this case, the output shaft 7 of the torque transmission device 11 is rotated in a predetermined direction at a constant speed, so that the ball screw 22 also rotates.

Therefore, the slide member 23 screwed to the ball screw 22 is guided by the guide base 24 to advance and retreat, and the position of the laser beam machine 25 with respect to the stamper glass 26 can be adjusted in the arrow D direction. For this reason, the stamper glass 26
The upper photoresist is exposed at a narrow pitch of 1.6 μm, for example. After the exposure, the photoresist is developed, and then nickel plating is performed to prepare an optical disc master.

As described above, in this master code cutter, the laser beam machine 25 can be moved with high precision by the ball screw 22 rotated by the torque transmission device 11, and a high precision master disc for optical discs can be formed. When the next master is to be created with this master code cutter, the moving base 3 of the torque transmission device 11 is lowered to the non-driving position B, the output shaft 7 is allowed to rotate freely, and the slide member 23 is moved at high speed. To return to the initial position.

[0054]

As described above, according to the present invention, a torque transmission device which does not cause vibration upon transmission of a rotational force and does not cause deterioration of the rotational force transmission means such as abrasion, and the like. It is possible to provide a highly accurate feeding device using the torque transmission device.

[Brief description of drawings]

FIG. 1 is a perspective view of a torque transmission device according to a preferred embodiment of the present invention.

2 is an enlarged front view around a magnetized cylinder of the torque transmission device of FIG. 1. FIG.

FIG. 3 is a front view of a magnetized cylinder.

FIG. 4 is a side sectional view of the magnetized cylinder of FIG.

FIG. 5 is a diagram showing directions of magnetic poles of a magnetized portion of a magnetized cylinder.

FIG. 6 is a diagram showing directions of magnetic poles between adjacent magnetized cylinders.

FIG. 7 is a diagram showing directions of magnetic poles between adjacent magnetized cylinders.

FIG. 8 is a diagram showing a positional relationship between a magnetized cylinder and a magnetic cylinder.

FIG. 9 is an explanatory diagram of a clutch mechanism of a torque transmission device according to a modified embodiment of the present invention.

FIG. 10 is a perspective view of a master cord cutter.

[Explanation of symbols]

 8 magnetized cylinder (magnetized rotor) 8a magnetized part 8A input magnetized cylinder (magnetized rotor) 8B intermediate magnetized cylinder (magnetized rotor) 8C idler magnetized cylinder (magnetizer rotor) 8D output magnetized Magnetic cylinder (magnetized rotary body) 9 Magnetic cylinder (magnetic rotary body) 11 Torque transmission device 22 Ball screw (feed screw) 23 Slide member (moving means) 25 Laser processing machine (laser light generating means) 26 Glass for stamper (rotating substrate) B) Drive position b Non-drive position c Drive position d Non-drive position V Gap

Claims (5)

[Claims] 1. A plurality of magnetized rotors having magnetized portions formed at a predetermined pitch on an outer peripheral portion thereof, or a magnetized rotor.
A torque transmission device, characterized in that it is arranged in non-contact with a magnetic rotating body made of a magnetic material to transmit a rotational force from one rotating body side to the other rotating body side. 2. The torque transmission device according to claim 1, wherein the size of the gap between the rotating bodies is adjustable. 3. The torque transmission device according to claim 1, wherein another rotating body is arranged so as to sandwich the rotating body with respect to the rotating body. 4. The rotary body and the rotary body sandwiching the rotary body are configured to be moved between an array position which is a drive position and a non-array position which is a non-drive position. Item 3. The torque transmission device according to item 3. 5. A plurality of magnetized rotors each having a magnetized portion formed at a predetermined pitch on the outer peripheral portion, or a magnetized rotor.
A magnetic transmission body formed of a magnetic material is arranged in a non-contact manner to transmit a rotational force from one rotating body side to the other rotating body side, and a torque transmitting device mounted on an output shaft of the torque transmitting apparatus. And a moving unit that moves the laser light generating unit in the radial direction of the master disc manufacturing substrate of the optical disc by rotation of the feed screw.