JP3786377B2 - Phase adjustment device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a phase adjusting device for performing phase adjustment between rotating bodies rotated by the same drive motor.
[0002]
[Prior art]
In a drive system such as a printing roll, phase adjustment between two rolls rotated by the same drive motor may be necessary. For this purpose, a phase adjusting device having a configuration shown in FIG. 4 is conventionally used.
[0003]
The phase adjusting device 1 shown in this figure is for adjusting the phase between the printing rolls 2 and 3, and these rolls 2 and 3 are rotated by the same drive motor 4. The roll 2 is directly driven by the drive motor 4. The side of the roll 3 is driven by a drive motor 4 via a rotational force transmission path constituted by a gear train and a phase adjusting speed reducer 5. The phase adjusting speed reducer 5 is driven by a phase adjusting motor 6.
[0004]
The phase adjusting speed reducer 5 is a differential gear device, and here, a flexure meshing gear device is used. The phase adjusting speed reducer 5 is fitted into annular rigid internal gears 51 and 52 arranged in parallel in a coaxial state, an annular flexible external gear 53 arranged inside these, and the inside thereof. The wave generator 54 is configured. The wave generator 54 has an elliptical contour shape, and the flexible external gear 53 is bent into an elliptical shape by the wave generator, and both ends of the major axis thereof are rigid internal gears 51. , 52 is engaged. When the wave generator 54 rotates, these meshing positions move in the circumferential direction.
[0005]
Here, the number of teeth of the flexible external gear 53 and the number of teeth of the one rigid internal gear 51 are the same, whereas the number of teeth of the other rigid internal gear 52 is two. There are many. Therefore, when the wave generator 54 is rotated and the meshing position of the flexible external gear 53 and the rigid internal gears 51 and 52 is moved in the circumferential direction, the flexible external gear having the same number of teeth. 53 and the rigid internal gear 51 do not generate relative rotation, but the other rigid internal gear 52 generates relative rotation. Thus, the high-speed rotation input to the wave generator 54 can be greatly decelerated from the rigid internal gear 51 or 52 and output. Since the principle of this type of speed reducer is well known, further explanation is omitted here.
[0006]
In the phase adjusting speed reducer 5 having this configuration, the wave generator 54 is driven by the phase adjusting motor 6. A gear 7 is fixed to the outer periphery of the rigid internal gear 51, and the gear 7 meshes with a gear 8 attached to the rotating shaft 2 a of the roll 2. A gear 9 is also fixed to the outer periphery of the other rigid internal gear 52, and this gear 9 meshes with a gear 11 attached to the rotation shaft 3 a of the roll 3.
[0007]
In the phase adjusting device 1, during the normal operation, the phase adjusting motor 6 is not driven and a brake is applied. In this case, the roll 2 is driven by the drive motor 4. Further, via a transmission path from the drive motor 4 to the rotary shaft 3a of the roll 3 via the rotary shaft 2a of the roll 2, the gear trains 8 and 7, the phase adjusting speed reducer 5, and the gear trains 9 and 11, The roll 3 is driven. Next, when the phase of the roll 3 with respect to the roll 2 needs to be adjusted, the phase adjusting motor 6 is driven.
[0008]
As described above, conventionally, a flexure 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 to slightly increase the speed of the roll 3. By transmitting to the side, phase adjustment between the rolls 2 and 3 is performed. When phase adjustment is unnecessary, the rotational force of the drive motor is transmitted as it is to the roll 3 side through the speed reducer.
[0009]
Here, also during normal operation, the speed reducer 5 operates to perform a speed reduction operation. Accordingly, 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 rotational speed and the output rotational speed of the speed reducer 5 become 1: 1. Is set to 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 in the respective speed reducers adjacent to each other are arranged. A common gear may be used. In this way, the rotation input from one speed reducer and decelerated or accelerated can be increased or decelerated reversely in the other speed reducer. To cancel the input / output rotation speed to 1: 1.
[0010]
[Problems to be solved by the invention]
However, when two sets of the speed reducers 5 having the above-described configuration are arranged, there are two meshing positions of the rigid internal gear and the flexible external gear in one set of the speed reducers. Therefore, the rotational force transmission accuracy may be deteriorated. In addition, since the speed reducer 5 having the above-described configuration is generally expensive, when two sets of the speed reducers 5 are used, the manufacturing price increases.
[0011]
An object of the present invention is to propose a phase adjusting device capable of solving these problems.
[0012]
[Means for Solving the Problems]
In order to solve the above-described problems, in the phase adjusting device of the present invention, a cup type and a top hat in which the meshing position of the rigid internal gear and the flexible external gear is one place as a speed reducer for phase adjustment. By using a configuration in which two sets of flexure meshing gear devices of the mold are used, the input rotational speed and the output rotational speed are set to 1: 1.
[0013]
That is, the phase adjusting device of the present invention transmits torque from the drive motor to the second rotating body in order to adjust the phase between the first and second rotating bodies that are rotated by the same driving motor. In the phase adjustment device in which a phase adjustment deceleration unit is interposed in the path and the phase adjustment deceleration unit is driven by a phase adjustment motor during phase adjustment, the phase adjustment deceleration units are arranged in parallel in a coaxial state. A configuration having disposed cup-type first and second flexure meshing gear devices is employed. Or the structure which has the 1st and 2nd bending meshing type gear apparatus of a top hat type is employ | adopted.
[0014]
That is, in place of the conventional speed reducer 5 in FIG. 4, a phase adjusting speed reduction unit including cup-type first and second flexibly meshing gear devices arranged in parallel in a coaxial state is employed.
[0015]
With reference to FIG. 1, the configuration of a phase adjusting speed reduction unit having cup-type first and second flexure meshing gear devices in the present invention will be described. As shown in this figure, the phase adjusting speed reduction unit 20 includes a cup-type first flexure meshing gear device 30 and a cup-type second flexure meshing gear device 40.
[0016]
The first flexure meshing gear device 30 includes an annular first rigid internal gear 31, a cup-shaped first flexible external gear 32 disposed on the inner side, and an inner side. And a first wave generator 33 that bends the first flexible external gear 32 in the radial direction and partially meshes with the first rigid internal gear 31. . The first wave generator 33 is connected to the phase adjusting motor 6 shown in FIG.
[0017]
Similarly, the second flexure meshing gear device 40 has an annular second rigid internal gear 41, a cup-shaped second flexible external gear 42 disposed on the inside thereof, and an inner side thereof. And a second wave generator 43 that is disposed in the second flexible external gear 42 and is partially meshed with the second rigid internal gear 41 by bending the second flexible external gear 42 in the radial direction. It has.
[0018]
The first flexible external gear 32 includes a cylindrical body 321, an annular diaphragm 322 blocking one end of the body 321, and a boss 323 integrally formed at the center of the diaphragm 322. And a cup shape provided with 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 is also formed integrally with a cylindrical body 421, an annular diaphragm 422 that seals one end of the body 421, and the center of the diaphragm 422. The boss 423 and the outer teeth 424 formed on the outer peripheral surface on the opening end side of the body 421 are formed in a cup shape.
[0019]
Here, the first flexible external gear 32 and the second flexible external gear 42 are fixed to each other so as to rotate together in a back-to-back state. That is, both bosses 423 and 423 are fixed by a plurality of fastening bolts 60.
[0020]
Further, the second wave generator 43 in the second flexure meshing gear device 40 is fixed so as not to rotate.
[0021]
Further, in the phase adjusting speed reduction unit 20 having this configuration, the first rigid internal gear 31 of the first flexure meshing gear device 30 is connected to the roll 2 side via the gear trains 7 and 8 in FIG. ing. That is, the rotation from the drive motor 4 is input. On the other hand, the rigid internal gear 41 of the second flexure 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 reversed.
[0022]
The operation of the phase adjusting device including the phase adjusting device deceleration unit 20 having this configuration will be described. In a normal power transmission state, braking is applied to the phase adjusting motor, so that the wave generator 33 of the first flexibly meshing gear device 20 is fixed. Further, as described above, the wave generator 43 of the second flexure meshing gear device 30 is always fixed. Therefore, if the reduction gear ratios of both gear units are set to be the same, the rotation input from the first rigid internal gear 31 can be obtained by connecting the same gear unit back to back in the simplest form. It 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 is transmitted from the second rigid internal gear 41. The rotation with the same rotation speed is output. Therefore, in a normal state, the phase adjusting deceleration unit 20 functions as a simple rotational force transmission path.
[0023]
Next, when the phase adjustment is necessary, the phase adjustment motor 6 is driven. As a result, the wave generator 33 of the first flexure meshing gear device 30 rotates, and the rotational phases of the first and second rigid internal gears 31 and 41 change. That is, the phase between the rolls 2 and 3 changes. Therefore, the phase state between the rolls 2 and 3 can be adjusted to an optimum state by controlling the amount and direction of rotation of the phase adjusting motor 6.
[0024]
In addition, you may manufacture the 1st and 2nd flexible external gears 32 and 42 mutually connected as an integrated object. FIG. 2 shows a half cross section of an integral flexible external gear 70 having portions 32A and 42A corresponding to the first and second flexible external gears 32 and 42 manufactured as a single body. is there.
[0025]
On the other hand, the above description is a case where the present invention is realized by using a cup-type flexure meshing gear device. The present invention can also be realized by using a top-hat type flexure meshing gear device. The top-hat type flexure meshing gear device is generally called in this way because its flexible external gear has a top-hat shape.
[0026]
FIG. 3 shows a half cross section of a top hat type flexure meshing gear device in which the 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 has a cylindrical body part 321a having a cylindrical body part, and extends radially outward from one opening edge of the body part 321a. A top hat provided with an annular diaphragm 322a, an annular boss 323a formed integrally and continuously on the outer peripheral edge of the diaphragm 322a, and an external tooth 324a formed on the outer peripheral surface on the other opening end side of the body 321a It has a shape. Similarly, the second flexible external gear 42A also has a cylindrical body 421a, an annular diaphragm 422a extending radially outward from one opening edge of the body 421a, and the diaphragm 422a. A top hat shape is provided with an annular boss 423a formed integrally and continuously with the outer peripheral edge, and external teeth 424a formed on the outer peripheral surface on the other opening end side of the body portion 421a.
[0027]
【The invention's effect】
As described above, in the phase adjusting device of the present invention, two sets of cup-type or top-hat type flexibly meshing gear devices are used in a back-to-back state, and the phase adjusting speed reduction unit having an input / output rotational speed of 1: 1 is used. It is composed. Therefore, according to the present invention, since the number of meshing positions of the gears is smaller than that of the phase adjustment unit having the input / output rotation speed of 1: 1 in the conventional configuration, the rotation transmission accuracy can be increased accordingly. Further, it can be manufactured at a lower cost than 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 modification of the flexible external gear in the unit of FIG.
3 is a half cross-sectional view showing a flexible external gear of a top hat type flexure meshing gear device applicable to the phase adjusting speed reduction unit of FIG. 1; FIG.
FIG. 4 is a schematic configuration diagram showing a conventional phase adjusting device.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Phase adjustment apparatus 2, 3 Roll 2a, 3a Roll rotating shaft 4 Drive motor 5 Reduction gear 51, 52 for phase adjustment Rigid internal gear 53 Flexible external gear 54 Wave generator 6 Phase adjustment motors 7, 8, 9, 11 Gear 20 Phase adjusting speed reduction unit 30 First flexure meshing gear device 31 First rigid internal gear 32, 32A Cup-shaped first flexible external gear 32B Top-hat-shaped first gear Flexible external gear 33 First wave generator 40 Second flexure meshing gear device 41 Second rigid internal gear 42, 42A Cup-shaped second flexible external gear 42B Top hat-shaped Second flexible external gear 43 Second wave generator

Claims (3)

In order to adjust the phase between the first and second rotating bodies rotated by the same drive motor, a phase adjusting deceleration unit is interposed in the rotational force transmission path from the drive motor to the second rotating body. In the phase adjustment device adapted to drive the phase adjustment deceleration unit by the phase adjustment motor at the time of phase adjustment,
The reduction gear unit for phase adjustment has first and second flexibly meshing gear devices arranged in parallel in a coaxial state,
The first flexure meshing gear device includes an annular first rigid internal gear, a cup-shaped first flexible external gear disposed on the inner side, and an inner side of the cup-shaped flexible external gear. A first wave generator comprising: a first wave generator configured to bend the first flexible external gear in a radial direction and partially mesh with the first rigid internal gear; The generator is connected to the phase adjustment motor,
The second flexure meshing gear device includes an annular second rigid internal gear, a cup-shaped second flexible external gear disposed on the inner side, and an inner side of the second flexible internal gear. A second wave generator configured to bend the second flexible external gear in a radial direction and partially mesh with the second rigid internal gear, and The flexible external gears are fixed to each other so as to rotate together with the first flexible external gear in a back-to-back state, and the second wave generator is fixed so as not to rotate. And
A phase adjusting device, wherein rotation from the drive motor is input to one gear of the first and second rigid internal gears and output from the other gear. 2. The phase adjustment unit according to claim 1, wherein the first and second flexible external gears are manufactured as a single body. 3. The first and second flexibly meshing gear devices according to claim 1, wherein a diaphragm portion is outwardly provided as a flexible external gear instead of the cup-shaped flexible external gear. A phase adjusting device comprising a spread top-hat-shaped flexible external gear.

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