JPH0668314B2 - Intermittent turning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is used in the technical field of an intermittent rotation device in which an output shaft intermittently rotates or oscillates, and in particular, a planetary gear device incorporating a non-circular gear. The present invention relates to an intermittent rotation device.

(Prior Art) In this specification, intermittent rotation means intermittent rotation and intermittent swing, as will be described later in detail.

Further, intermittent rotation means repeating rotation and stop in the same direction for a certain time, for example, after rotating for a certain time S ₁ and then stopping for a certain time S ₂ and repeating this. The rotation direction of the intermittent rotation changes each time.

Conventionally, such an intermittent rotation mechanism is often used in a manufacturing process for industrially mass-producing electronic components such as semiconductors, capacitors and resistors and other components.

And, as an intermittent rotation device by a planetary gear device incorporating a non-circular gear (a gear whose pitch line is not circular) created by CAD or CAM, for example, the 2nd Design Automation Engineering Lecture Lecture Collection ( July 1984), pages 38-40. However, the intermittent indexing accuracy of this intermittent rotation device is required to improve the accuracy of gears including non-circular gears and to reduce the backlash of mutual meshing to zero. However, this entails problems such as the limit of improvement in processing accuracy and the cost of the entire apparatus. Therefore, for example, one rotation of the input shaft of such an intermittent rotation device is detected by a sensor such as a limit switch or a proximity switch, and a disc provided on the output shaft is provided with as many positioning holes as the number of indexes. However, it has been attempted to improve the indexing accuracy by inserting a train wheel setting pin that is driven by a hydraulic / pneumatic pressure, an electric motor, a solenoid, or the like into and out of this.

(Problems to be Solved by the Invention) However, in the system in which the train wheel setting pin is projected and retracted by the output signal of the sensor and is inserted into the positioning hole on the output shaft side as described above, in addition to the sensor, a relay, a sequencer, etc. The control device and the drive sources such as hydraulic pressure, pneumatic pressure, and electricity for driving these are required, which makes the device complicated and expensive. Further, since it is an indirect drive, an interlock is required to prevent a malfunction, and the time lag between the detection by the sensor and the actuation of the train wheel setting pin is unavoidable, which is not suitable for high speed operation.

The present invention is intended to solve such a problem.

(Means for Solving the Problems) Means for solving the above problems in the present invention will be described with reference to FIG.

Planetary gear unit 2 constituting the intermittent rotation device 1 of the present invention
Is provided with a casing 3, an input shaft 4 and an output shaft 5 supported by the casing 3, and non-circular gears 6 and 7 interposed between the input shaft 4 and the output shaft 5. Become. Further, a cam 10 is integrally formed on the input shaft 4,
The casing 3 is provided with train wheel pin support means 12 for supporting the train wheel setting pin 11, and the output shaft 5 is integrally provided with an indexing plate having a fitting hole 13a formed therein. The guide pin is protruded and retracted by 10 and the tip end portion 11a of the train wheel pin 11 can be fitted into the fitting hole 13a when the train wheel pin 11 is projected.
It is characterized in that 11 is fitted in the fitting hole 13a.

(Operation) The input shaft 4 is rotated by a prime mover at a constant angular velocity, for example. The output shaft 5 is intermittently rotated by the well-known operation of the non-circular gears 6 and 7. And when this intermittent rotation is stopped, the cam
10 makes the train wheel setting pin 11 project. This protruding train pin 11
The tip portion 11a of the is fitted into the fitting hole 13a of the indexing plate 13. Thus, the rotation of the index plate 13, that is, the output shaft 5 integrated with the index plate 13 is accurately restrained. The cam 10 releases the protrusion of the train wheel setting pin 11 just before the input shaft 4 further rotates and the output shaft 5 re-rotates. Along with this, the fitting of the tip portion 11a of the train wheel setting pin 11 into the fitting hole 13a is also released, and the rotation of the output shaft 5 is allowed.

(Embodiment) Next, a first embodiment of the present invention will be described in detail with reference to FIGS.

The casing 3 has a central yoke 3a, a front lid 3b through which the output shaft 5 protrudes, and a rear lid 3c through which the input shaft 4 penetrates.
And consists of.

A known speed reducer 14 is attached to the rear lid 3 via a bearing box 15, and an output shaft of the speed reducer 14 is supported by a bearing 16 in the bearing box 15 and protrudes into the yoke 3a as an input shaft 4. .

A prime mover 17 such as a motor is connected to the rear (right side in FIG. 1) of the speed reducer 14, and although not shown in detail, the prime mover 17
The output shaft of and the input shaft of the speed reducer 14 are connected.

A carrier 18 is integrally provided on the input shaft 4 protruding into the yoke 3a. The outer circumference of the carrier 18 is a bearing
It is supported on the casing 3 by 21. Also carrier 18
In the front-back direction (left-right direction in Fig. 1)
19 is supported by bearings 20 and this planetary gear shaft 19
A planetary gear, that is, a circular gear 8 and a non-circular gear 6 are provided at both ends of, ie, the front and rear portions of the carrier 18 while being restrained from rotating with respect to the planetary gear shaft 19. Of these planetary gears, the rear non-circular gear 6 that serves as the main driving gear is the non-circular gear 7 as a fixed gear that is integrally provided in the bearing box 15.
Is meshed with. The circular gear 8 that serves as one of the driven gears is a circular gear 9 that is integral with the output shaft 5 and that serves as an output gear.
Is meshed with. A mass balance mounting shaft 22 is mounted at a position symmetrical to the planetary gear shaft 19 of the carrier 18, and a mass balance 23 is fixedly installed in front of and behind the mass balance mounting shaft 22.

The front and rear of the output shaft 5 are supported by a bearing 24 provided on the front lid 3b and a bearing 25 provided on the carrier 18.

The cam 10 is formed as an end cam on the front side of the carrier 18. In this embodiment, the output shaft 5 is intermittently rotated once per one rotation of the input shaft 4, and the shape of the pitch lines of the non-circular gears 6 and 7 and the rotation angle θ of the input shaft 4 and the output are obtained. Relationship curve with rotation angle Φ of shaft 5, and cam
The relationship curve between the lift L of 10 and the rotation angle θ is as shown in FIGS.

Further, in this embodiment, the cam 10 has a convex portion at one position on its circumference, and the setting pin 11 is projected by this convex portion so that the tip portion 11a thereof is fitted into the fitting hole 13a. As is apparent from FIG. 4, the fitting hole 13a is formed on the rear surface of the indexing plate 13 so as to be equally divided on the circumference.
It is drilled in 6 places.

The train wheel setting pin support means 12 includes a train wheel setting pin 11 in the bracket 12a.
Is stored slidably in the front-back direction. This regulation pin
11 is divided into a front portion 11b and a rear portion 11c, a disc spring 11d is provided on the mutual contact surface of the two, the front end of the front portion 11b forms a tip portion 11a, the rear end of the rear portion 11c. It comes into contact with the cam 10. The tip 11a is tapered, and the fitting hole 13a is dished on the side where the tip 11a is fitted.
The disc spring 11d is for compressing the disc spring 11d when the train wheel setting pin 11 is pushed by the cam 10 so that the tip portion 11a fits into the fitting hole 13a without play. Compression spring 1
1e is provided for constantly pressing the train wheel setting pin 11 to the cam 10. The fitting hole 13a does not necessarily need to penetrate, and may be a blind hole.

The operation of this embodiment will be described in detail below.

That is, the non-circular gears 6 and 7 of this embodiment have the same number of teeth, and the pitch diagram thereof is as shown in FIG. 3 as described above. Then, as the input shaft 4 rotates at a constant speed, the carrier 18
Rotates, and accordingly, the non-circular gear 6 as a planetary gear revolves at a constant speed. Since the non-circular gear 6 meshes with the non-circular gear 7 as the fixed gear, the non-circular gear 6 rotates at a non-constant speed. Further, the circular gear 8 also rotates at a constant speed and a non-constant speed. By the revolution of the circular gear 8, the circular gear 9 meshing with the circular gear 8, that is, the output shaft 5 also rotates at a non-constant speed. The rotation angle Φ of the output shaft 5 with respect to the rotation angle θ of the input shaft 4 is as shown in FIG. As shown in FIG. 4, the input shaft 4
The output shaft 5 rotates 22.5 ° while rotating 180 °, and the output shaft 5 stops while the input shaft 4 further rotates 180 °. That is, the output shaft 5 rotates intermittently.

Therefore, as shown in FIG. 4, the expansion curve of the cam 10 in this embodiment has only one peripheral ridge portion of the cam 10, and the output shaft 5 stops when the input shaft 4 makes one revolution. During this period, the setting pin 11 is pushed by the mountain portion of the cam 10 and is inserted into the insertion holes 13a formed in 16 equal parts at intervals of 22.5 degrees on the circumference of the indexing plate 13 so that the indexing plate 13 It restrains rotation.

Next, the second embodiment will be described mainly with reference to FIG. 5 while focusing on differences from FIG.

The train wheel setting pin 11 of this embodiment is provided in a direction perpendicular to the axial direction of the input shaft 4 and the output shaft 5. Therefore, the cam surface of the cam 10 is also formed on the inner circumferential surface, and the fitting hole 13a and the indexing plate 13 are also formed. It is provided in the radial direction.

As still another embodiment, the non-circular gears 6 and 7 can be configured by a known method in order to intermittently oscillate the output shaft 5, and a detailed description thereof will be omitted.

(Effect of the Invention) As described above, the intermittent rotation device of the present invention is configured such that the train wheel setting pin which is projected and retracted by the cam integral with the input shaft is fitted into the fitting hole of the indexing plate integral with the output shaft. Therefore, there is an advantage that the rotational position of the output shaft is accurately maintained, the operation is reliable especially at high speed, and the device is small and inexpensive.

[Brief description of drawings]

1 to 4 show a first embodiment of the present invention. FIG. 1 is an overall longitudinal side view, FIG. 2 is a partial cross sectional front view, FIG. 3 is a plan view of a non-circular gear, and FIG. 3 is a characteristic curve showing θ-Φ and θ-L. FIG. 5 is a schematic view showing the second embodiment. 1 ... intermittent rotation device, 2 ... planetary gear device, 3 ... casing, 4 ... input shaft, 5 ... output shaft, 6.7 ... non-circular gear, 10 ... cam, 11 ... train pin, 11a ... tip, 1
2 …… Regulating pin support means, 13 …… Indexing plate, 13a …… Insertion hole

Front page continued (72) Inventor Teruo Aizaki 6-1 Shioya-cho, Minami-ku, Aichi Prefecture Takahiro Industrial Co., Ltd. (72) Inventor Tetsuhisa Matsushita, 6-1 Shioya-machi, Minami-ku Nagoya, Aichi Takahiro Industrial Co., Ltd. In the company

Claims (5)

[Claims] 1. An intermittent rotation device using a planetary gear device, wherein an input shaft and an output shaft are axially supported by a casing, and a non-circular gear is interposed between the input shaft and the output shaft. The cam includes a cam integrally formed with the input shaft, a train wheel pin support means provided on the casing, and the train wheel is retracted by the cam, and an index plate integrated with the output shaft. An engaging hole into which the tip end of the train wheel setting pin can be inserted is bored, and the train wheel setting pin is inserted into the inserting hole when the output shaft is intermittently stopped. . 2. The intermittent rotation device according to claim 1, wherein the non-circular gear is formed so that the output shaft rotates intermittently by the rotation of the input shaft. 3. The intermittent rotation device according to claim 1, wherein the non-circular gear is formed so that the output shaft intermittently oscillates due to rotation of the input shaft. 4. The intermittent rotation device according to claim 1, wherein the cam is formed on a carrier integrated with the input shaft. 5. The carrier of the planetary gear device, wherein the input shaft and the output shaft are axially supported by penetrating the casing in the front-rear direction and concentrically with each other, and integrally with the input shaft. A pair of planetary gears are supported in the front and rear portions of the planetary gear.The main driving gear on the input shaft side of these planetary gears meshes with a fixed gear integrally provided with the casing, while the driven gear on the output shaft side outputs the output. The intermittent rotation device according to any one of claims 1 to 4, which meshes with an output gear integrally provided with the shaft.