JPH10100372A - Phase adjusting apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inexpensively produce a phase adjusting apparatus for performing the phase adjustment between a plurality of rotary bodies so that a rotation transmission error is reduced. SOLUTION: The speed reducing unit 20 for adjusting the phase of a phase adjusting apparatus has first and second bending mesh type cup-shaped gear devices 30, 40 and the first wave motion generator 33 of the first bending mesh type gear device 30 is connected to a phase adjusting motor. A first flexible outer gear 32 and the second flexible outer gear 42 of the first bending mesh type gear device 40 are fixed by a plurality of clamping bolts 60 so as to be integrally rotated in a back-to-back state. The second wave motion generator 43 of the second bending mesh gear device 40 is made impossible to rotate and, at a time of the usual transmission of power, the phase adjusting motor is not operated and, therefore, if the speed reducing ratio of both gear devices is made same, the input rotation to the first rigid inner gear 31 of the first bending mesh gear device is outputted in the same number of rotations from the second rigid inner gear 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a phase adjusting device for adjusting the phase between rotating bodies rotated by the same drive motor.

[0002]

2. Description of the Related Art In a drive system such as a printing roll, it may be necessary to adjust the phase between two rolls rotated by the same drive motor. For this purpose, a phase adjusting device having the configuration shown in FIG. 4 is conventionally used.

A phase adjusting device 1 shown in FIG. 1 is for adjusting the phase between printing rolls 2 and 3, and these rolls 2 and 3 are rotated by the same drive motor 4. The roll 2 is driven directly by a drive motor 4. The side of the roll 3 is driven by a drive motor 4 via a rotational force transmission path composed of a gear train and a phase adjustment speed reducer 5. The phase adjustment speed reducer 5 is driven by a phase adjustment motor 6.

[0004] The phase adjustment speed reducer 5 is a differential gear device, and here, a flexion meshing gear device is used. This phase adjustment speed reducer 5 is fitted in an annular rigid internal gear 51, 52 arranged in a coaxial state in parallel, an annular flexible external gear 53 arranged in the inside thereof, and inside thereof. It comprises a wave generator 54. The wave generator 54 has an elliptical outline shape, and the flexible external gear 53 is bent into an elliptical shape by this wave generator, and both ends of its long axis are rigid rigid gear 51. , 52. When the wave generator 54 rotates, these meshing positions move in the circumferential direction.

Here, the number of teeth of the flexible external gear 53 and the number of teeth of one rigid internal gear 51 are the same, whereas the number of teeth of the other rigid internal gear 52 is smaller than that. There are two more. Therefore, when the wave generator 54 is rotated to move the meshing position between the flexible external gear 53 and the rigid internal gears 51 and 52 in the circumferential direction, the flexible external gear having the same number of teeth is provided. No relative rotation occurs between 53 and the rigid internal gear 51, but relative rotation occurs with respect to the other rigid internal gear 52. In this way, the high-speed rotation input to the wave generator 54 can be output from the rigid internal gear 51 or 52 while being greatly reduced. Since the principle of this type of speed reducer is well known, further description is omitted here.

In the phase adjusting speed reducer 5 having this configuration, the wave generator 54 is driven by the phase adjusting motor 6. Further, a gear 7 is fixed to the outer periphery of the rigid internal gear 51, and the gear 7 is a rotating shaft 2 a of the roll 2.
Gear 8 attached to the gear. The gear 9 is also fixed to the outer periphery of the other rigid internal gear 52, and this gear 9 meshes with the gear 11 attached to the rotating shaft 3 a of the roll 3.

In the phase adjusting device 1, during normal operation, the phase adjusting motor 6 is not driven, and the brake is applied. In this case, the roll 2 is driven by the drive motor 4. Further, the driving motor 4 outputs the rotation shaft 2 of the roll 2.
a, gear trains 8 and 7, phase adjustment speed reducer 5, gear trains 9 and 1
The roll 3 is driven via a transmission path extending to the rotation shaft 3a of the roll 3 via the first roller 1. Next, when it becomes necessary to adjust the phase of the roll 3 with respect to the roll 2, the phase adjusting motor 6 is driven.

As described above, in the prior art, a flexion-meshing gear device is used as a phase adjustment speed reducer, and at the time of phase adjustment, the speed reducer is driven to slightly increase or decrease the rotation of the drive motor. By transmitting the light to the roll 3, the phase between the rolls 2 and 3 is adjusted. When the phase adjustment is unnecessary, the rotational force of the drive motor is transmitted to the roll 3 as it is via the speed reducer.

Here, even during normal operation, the speed reducer 5 operates to perform a speed reduction operation. Therefore, by setting the number of teeth of the input-side gear trains 8 and 7 and the output-side gear trains 9 and 11 to appropriate values, the input rotation speed and the output rotation speed of the reduction gear 5 become 1: 1. It is set as follows. In order to simplify the power transmission path by omitting such a gear train, two sets of the speed reducers 5 having the above-described configuration are arranged coaxially, and the rigid internal teeth of each of the speed reducers adjacent to each other are arranged. The gears may be shared. By doing so, the rotation input from one of the speed reducers and reduced or increased in speed can be increased or decreased in speed in the other speed reducer, and accordingly, the speed change operation can be performed by the two sets of speed reducers 5. And the input / output rotation speed can be made 1: 1.

[0010]

However, when two sets of the speed reducers 5 having the above-described configuration are arranged, the meshing positions of the rigid internal gear and the flexible external gear in two sets in one set of the speed reducers are reduced. As a result, there are four meshing positions of rigidity, and there is a possibility that the rotational force transmission accuracy may deteriorate. In addition, since the speed reducer 5 having the above configuration is generally expensive, the use of two sets of speed reducers 5 results in an increase in the manufacturing cost.

An object of the present invention is to propose a phase adjusting device which can solve these problems.

[0012]

In order to solve the above-mentioned problems, in the phase adjusting device of the present invention, the meshing position of the rigid internal gear and the flexible external gear is used as the phase adjusting reduction gear. By using a configuration having two sets of one cup-type and one silk-hat type flexible meshing gear device, the input rotation speed and the output rotation speed are made 1: 1.

That is, the phase adjusting device of the present invention adjusts the phase between the first and second rotating bodies rotated by the same driving motor, so that the phase of the driving motor from the driving motor to the second rotating body is adjusted. In a phase adjustment device in which a phase adjustment deceleration unit is interposed in the rotational force transmission path and the phase adjustment deceleration unit is driven by a phase adjustment motor during phase adjustment, the phase adjustment deceleration unit is coaxial. A configuration having cup-shaped first and second flexible meshing gear devices arranged in parallel in a state is adopted. Alternatively, a configuration having first and second flexible meshing gear devices of a silk hat type is adopted.

That is, instead of the conventional speed reducer 5 shown in FIG. 4, a phase adjusting speed reduction unit having cup-shaped first and second flexible meshing gear devices arranged in a coaxial state in parallel is employed. I have.

Referring to FIG. 1, the structure of a phase adjusting reduction unit having cup-shaped first and second flexible meshing gear units in the present invention will be described. As shown in this figure, the phase adjustment reduction unit 20 has a cup-shaped first flexible meshing gear device 30 and a cup-shaped second flexible meshing gear device 40.

The first flexible meshing gear device 30 comprises an annular first rigid internal gear 31, a cup-shaped first flexible external gear 32 disposed inside the first internal gear 31, and a first flexible internal gear 32 disposed inside the first internal rigid gear 31. A first wave generator 33 which is arranged and radially deflects the first flexible external gear 32 to partially mesh with the first rigid internal gear 31; Have. This first wave generator 33 is connected to the phase adjusting motor 6 shown in FIG.

Further, the second flexible meshing gear device 40
Similarly, an annular second rigid internal gear 41, a cup-shaped second flexible external gear 42 disposed inside the second rigid internal gear 41,
A second wave generator arranged inside the second flexible external gear 42 and radially bending the second flexible external gear 42 to partially mesh with the second rigid internal gear 41; 43
And

The first flexible external gear 32 has a cylindrical body 321, an annular diaphragm 322 closing one end of the body 321, and the diaphragm 322.
And a boss 323 integrally formed at the center of the body, and external teeth 324 formed on the outer peripheral surface on the opening end side of the body portion 321. Similarly, the second flexible external gear 42
Also, a cylindrical body 421, an annular diaphragm 422 closing one end of the body 421, a boss 423 integrally formed at the center of the diaphragm 422, and an opening end side of the body 421. And has external teeth 424 formed on the outer peripheral surface of the cup.

Here, the first flexible external gear 32 and the second
Are externally fixed so as to rotate integrally with each other in a back-to-back state. That is, both bosses 423 and 423 are fixed by a plurality of fastening bolts 60.

Further, the second flexible meshing gear device 40
The second wave generator 43 is fixed so that it cannot rotate.

Further, in the phase adjusting reduction unit 20 having this configuration, the first flexible meshing gear unit 30 is provided.
Of the first rigid internal gear 31 is the gear train 7, 8 in FIG.
To the roll 2 side. That is, the rotation from the drive motor 4 is input. In contrast, the second
The rigid internal gear 41 of the flexible meshing gear device 40 is connected to the other roll 3 via the gear trains 9 and 11 in FIG. That is, it is on the rotation output side.
The relationship between the rotation input side and the rotation output side may be set to be opposite.

The phase adjusting device speed reduction unit 20 of this configuration
The operation of the phase adjustment device provided with is described. In a normal power transmission state, since the braking is applied to the phase adjusting motor, the first flexible meshing gear device 20 is used.
The wave generator 33 is fixed. Further, as described above, the wave generator 43 of the second flexible meshing gear device 30 is used.
Is always in a fixed state. Therefore, if the same reduction gear ratio is set for both gear devices in the simplest form and the same gear device is connected back-to-back, the rotation input from the first rigid internal gear 31 becomes The power is transmitted to the second rigid internal gear 41 via the first flexible external gear 32 and the second flexible external gear 42, and the input rotational speed and the rotation speed are transmitted from the second rigid internal gear 41. The same number of rotations is output.
Therefore, in a normal state, the phase adjustment deceleration unit 20
Functions as a simple torque transmission path.

Next, when the phase adjustment is required, the phase adjusting motor 6 is driven. As a result, the wave generator 33 of the first flexion-meshing gear device 30 rotates,
And the rotational phase of the second rigid internal gears 31 and 41 changes. That is, the phase between the rolls 2 and 3 changes. Therefore, by controlling the rotation amount and the rotation direction of the phase adjusting motor 6, the phase state between the rolls 2 and 3 can be adjusted to an optimal state.

The first and second flexible external gears 32 and 42 connected to each other may be manufactured as a single unit. FIG. 2 shows portions 32A corresponding to the first and second flexible external gears 32 and 42 manufactured as one piece.
A half section of the integral flexible external gear 70 with 42A is shown.

On the other hand, the above description is directed to a case where the present invention is realized using a cup-type flexible meshing gear device.
The present invention can also be realized by using a silk hat type flexible meshing gear device. A silk hat type flexible meshing gear device is generally referred to as such because its flexible external gear has a silk hat shape.

FIG. 3 shows a half cross-section of a top hat type flexible meshing gear device in which top hat type flexible external gears are connected in a back-to-back state. As shown in this figure, the first flexible external gear 32B
Is a cylindrical torso 321a and a torso 3
An annular diaphragm 322a extending radially outward from one opening edge of the opening 21a;
An annular boss 32 formed continuously and integrally with the outer peripheral edge of 22a
3a and a top hat shape having external teeth 324a formed on the outer peripheral surface on the other open end side of the body portion 321a. Similarly, the second flexible external gear 42A also has a cylindrical body 421a and an annular diaphragm 4 extending radially outward from one opening edge of the body 421a.
22a, an annular boss 423a continuously and integrally formed on the outer peripheral edge of the diaphragm 422a, and external teeth 424a formed on the outer peripheral surface on the other open end side of the body 421a. ing.

[0027]

As described above, in the phase adjusting device of the present invention, two sets of cup-type or silk-hat type flexible meshing gear devices are used in a back-to-back state, and the input / output rotation speed is 1: 1. It constitutes an adjustment reduction unit. Therefore, according to the present invention, the input / output rotation speed of the conventional configuration is 1: 1 compared to the phase adjustment unit.
Since the number of meshing points of the gears is small, the rotation transmission accuracy can be improved accordingly. Further, it can be manufactured at a lower cost as compared with a conventional phase adjusting deceleration unit.

[Brief description of the drawings]

FIG. 1 is a half sectional view showing a schematic configuration of a phase adjusting deceleration unit to which the present invention is applied.

FIG. 2 is a half sectional view showing a modified example of the flexible external gear in the unit of FIG. 1;

FIG. 3 is a half sectional view showing a flexible external gear of a silk hat type flexible meshing gear device applicable to the phase adjusting reduction unit of FIG. 1;

FIG. 4 is a schematic configuration diagram showing a conventional phase adjustment device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Phase adjuster 2, 3 Roll 2a, 3a Roll rotation shaft 4 Drive motor 5 Phase adjuster 51, 52 Rigid internal gear 53 Flexible external gear 54 Wave generator 6 Phase adjuster motor 7, 8, 9, 11 Gear 20 Phase adjustment reduction unit 30 First flexible meshing gear device 31 First rigid internal gear 32, 32A Cup-shaped first flexible external gear 32B Silk hat-shaped first Flexible external gear 33 First wave generator 40 Second flexible meshing gear 41 Second rigid internal gear 42, 42A Cup-shaped second flexible external gear 42B Silk hat-shaped Second flexible external gear 43 Second wave generator

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[Procedure amendment]

[Submission date] January 13, 1997

[Procedure amendment 1]

[Document name to be amended] Drawing

[Correction target item name] All figures

[Correction method] Change

[Correction contents]

FIG.

FIG. 2

FIG. 3

FIG. 4

Claims (3)

[Claims] 1. A phase adjusting mechanism for adjusting a phase between a first rotating body and a second rotating body rotated by the same driving motor, the first rotating body being provided with a rotating force transmission path from the driving motor to the second rotating body. In a phase adjustment device having a speed reduction unit interposed and driven by a phase adjustment motor at the time of phase adjustment, the phase adjustment speed reduction unit includes a first coaxially arranged first parallel deceleration unit. And a second flexible meshing gear device, wherein the first flexible meshing gear device has an annular first rigid internal gear and a cup-shaped first movable gear disposed inside the first rigid internal gear. A flexible external gear, which is disposed inside the first external gear and radially bends the first flexible external gear to partially mesh with the first rigid internal gear; A first wave generator The first wave generator is connected to the phase adjusting motor, and the second flexible meshing gear device includes an annular second rigid internal gear and a cup-shaped gear disposed inside the second rigid internal gear. A second flexible external gear and a second flexible external gear disposed inside the second flexible external gear and radially deflecting the second flexible external gear to partially with respect to the second rigid internal gear. A second wave generator meshing with the first flexible external gear is fixed to the first flexible external gear so as to rotate integrally with the first flexible external gear in a back-to-back state. The second wave generator is fixed so as not to rotate, and rotation from the drive motor is input to one of the first and second rigid internal gears, and the other is rotated. A phase adjusting device characterized by being output from a gear. 2. The method of claim 1, wherein the first and second
Wherein the flexible external gear is manufactured as a single unit. 3. The flexible external gear according to claim 1 or 2, wherein the first and second flexible meshing gears are formed of a diaphragm instead of the cup-shaped flexible external gear as a flexible external gear. A phase adjusting device, comprising: a silk hat-shaped flexible external gear whose part is spread outward.