JPH0786348B2 - Index motor - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to an index motor in which a pressure shaft is endlessly rotated by a constant angle by fluid pressure.

[Prior Art] In an industrial machine utilizing fluid pressure, it may be necessary to rotate a work endlessly by a certain angle, and if the work is moved by fluid pressure, another special power source is required. There is an advantage of not doing.

However, although the rotary motor can rotate the output shaft endlessly, it is difficult to accurately stop the output shaft by a predetermined angle.

Further, the swing actuator can accurately stop the output shaft by a fixed angle, but since the endless rotation is not taken into consideration, the output shaft cannot be endlessly rotated because the rotation swing is repeated. There is.

In order to solve this problem, a swing actuator, an index mechanism capable of endless rotation, and a rotation swing of the shaft of the swing actuator are intermittently transmitted to the index mechanism to endlessly move the index mechanism at a predetermined angle. An index motor having a fluid pressure actuated clutch mechanism for rotating and a detent mechanism for holding a rotational position of the index mechanism is disclosed.
It is proposed in Japanese Patent Publication No. 57-097902.

This index motor can rotate the index mechanism endlessly by a predetermined angle by the swing actuator, but there is a lack of consideration for power transmission between the swing actuator and the index mechanism. Since the hollow shaft is provided and the spline is provided on the hollow shaft and the piston for intermittently transmitting the rotational swing of the shaft to the index mechanism, the existing swing actuator cannot be used.

Further, since the clutch mechanism is provided on one side of the swing actuator and the index mechanism is provided on the other side, the index motor becomes large in size.

[Problem to be Solved by the Invention] The problem to be solved by the present invention is to provide an index motor which uses an existing rocking actuator and can be driven by fluid pressure.

[Means for Solving the Problems] In order to solve the above problems, the index motor of the present invention uses a swing actuator, an endless rotatable index mechanism, and a rotary swing of the shaft of the swing actuator as an index mechanism. An index motor including a fluid pressure operated clutch mechanism that intermittently transmits the index mechanism to rotate endlessly by a predetermined angle, and a detent mechanism for holding a rotational position of the index mechanism, wherein the swing actuator Attach the body to, and inside the body, the index mechanism,
By incorporating a clutch mechanism and a detent mechanism, the index mechanism is an index plate having a plurality of V grooves arranged on the outer peripheral surface at equal intervals, and the detent mechanism is attached in a direction to be locked in the V groove by a spring. Characterized by the fact that it is composed of energized balls.

[Operation] When the fluid pressure clutch mechanism is in the power transmission position, the rotation of the shaft of the swing actuator is transmitted to the index mechanism to rotate the index mechanism by a certain angle, and the detent mechanism operates. Held in that position.

When the transmission of power is cut off by the clutch mechanism, the index mechanism is held by the detent mechanism and stops at that position, the swing actuator rotates in the opposite direction and returns to the original state, and The index mechanism rotates endlessly by a certain angle due to the movement and the connection / disconnection of the clutch mechanism.

In this case, since the clutch mechanism is actuated by the same pressure fluid as the swing actuator, it is not necessary to provide another separate power source, and the swing mechanism with a constant rotation angle causes the index mechanism to rotate endlessly. , The index is accurate.

Further, since the index motor can be constructed by attaching a body incorporating the index mechanism, the clutch mechanism and the detent mechanism to the swing actuator, the existing swing actuator can be used as it is. It can be made inexpensive and can be made small.

[Embodiment] FIG. 1 to FIG. 3 show a first embodiment of the present invention. This index motor includes an oscillating actuator 1, a rotatable index mechanism 2, and an oscillating actuator 1 for oscillating and rotating. 2, a fluid pressure operated clutch mechanism 3 for intermittent transmission, and an index mechanism 2
The detent mechanism 4 for holding the rotation position of the.

The swing actuator 1 is composed of a well-known swing actuator such as a vane type or a rack and pinion type.
A body 6 including the index mechanism 2, the clutch mechanism 3 and the detent mechanism 4 is integrally connected to the swing actuator 1 via a plate 7.

The body 6 is provided with a recessed portion 6a whose plate side has an enlarged diameter, and the cylinder 8 constituting the clutch mechanism 3 which is inserted into the recessed portion so as to be rotatable and swingable has a boss 8a in the central portion thereof in which the shaft 1a of the swing actuator 1 is stopped. It is fixed by a screw 9 and a cover 10 is screwed on the opening. Therefore, the known swing actuator can be used as it is without modification.

The cylinder 8 is divided into a breathing chamber 13 on the plate side and a pressure chamber 14 on the opposite side by a piston 12 sliding inside,
The spring 15 is retracted in the breathing chamber 13 so that these chambers 13, 14
Respectively communicate with a breathing port 16 formed in the body 6 and a supply port 17 for pressurized air.

The piston 12 has a guide bar 12a in the axial direction of the central portion.
The holder 19 holding the clutch plate 18 is fixed with a set screw 20 at the tip extending out of the cover 10, and the piston 12 and the cover 10 are radially aligned with the guide hole 12b of the guide bar 12a. The connecting pin 21 that has been inserted through them is connected so as to be integrally swingable and relatively slidable.

Therefore, the clutch mechanism 3 rotates and swings integrally with the swing actuator 1, and the clutch plate 18 slides in the recess 6a when the pressure air is supplied to and discharged from the pressure chamber 14.

A plurality of index plates 23 constituting the index mechanism 2 are arranged at equal intervals on the outer peripheral surface (4 in the first embodiment).
Individual) V-grooves 24a, 24b, 24c, 24d, which are fixed by a set screw to an output shaft 26 supported by a bearing 25 also serving as a thrust radial provided on the body 6, and are spaced at a predetermined distance from the clutch plate 18. Lay and face each other.

The detent ball 28 that constitutes the detent mechanism 4 is locked in any one of the V grooves by the biasing force of the detent spring 30 that is compressed between the detent ball 28 and the screw 29 that is screwed to the body 6. .

The number of the V-grooves is determined by the rotation angle of the swing actuator 1, and may be arranged at equal intervals on the outer circumference of the index plate 23 and is not limited to four.

Next, the operation of the first embodiment will be described.

FIG. 1 shows the state in which the piston 12 moves downward in the drawing against the urging force of the spring 15 by the pressurized air supplied from the port 17, and the clutch mechanism 3 is disengaged. It is locked to 24a (see Fig. 3).

In this state, when the pressure air in the pressure chamber 14 is discharged,
The urging force of the spring 15 causes the piston 12 to move upward in the drawing, the clutch plate 18 is pressed against the index plate 23, and the clutch mechanism 3 is connected. Therefore, when the rocking actuator 1 is rotated in one direction by the pressurized air, this rotation is transmitted to the index plate 23 via the clutch mechanism 3, and the index mechanism 2 is rotated by the same angle as the detent ball 28. Locks in the next V groove 24b or 24d. Then, the pressurized air is supplied from the port 17 to the clutch mechanism 3
When the oscillating actuator 1 is rotated in the opposite direction by reversing the supply of pressurized air while rotating the oscillating actuator 1, the oscillating actuator 1 returns to its original state, and the index mechanism 2
Is stopped in that position by locking the detent ball 28 in the V groove 24b or 24d.

Therefore, by repeating the above-described operation, the output shaft 26 can be indexed endlessly by a constant angle. In this case, it goes without saying that the supply and discharge of the pressure air to the swing actuator 1 and the supply and discharge of the pressure air to the pressure chamber 14 are synchronized by an appropriate means such as a valve.

Although the clutch mechanism 3 is connected by exhaust air, it may be connected by air supply, and the clutch plate 18 and the index plate 23 transmit power by the engagement of a pair of opposed gears. be able to. Furthermore, the detent mechanism 4 includes a detent spring 30.
Alternatively, the detent ball 28 may be pneumatically actuated such that the detent ball 28 is locked in the V groove by pressurized air.

In the first embodiment described above, since both the swing actuator 1 and the clutch mechanism 3 are operated by the pressure fluid, it is not necessary to provide a separate power source.

In addition, since the rotation of the swing actuator 1 at a constant angle is transmitted to the index mechanism 2 by the engagement and disengagement of the clutch mechanism 3 and the rotation position of the index mechanism 2 is held by the detent mechanism 4, the index is accurate and the endless rotation is performed. Can be made.

Further, since the swing actuator can be used as it is, the index motor as a whole can be made inexpensive.

FIG. 4 shows a second embodiment of the present invention. This index motor comprises two swing actuators 33a and 33b, clutch mechanisms 34a and 34b, index mechanisms 35a and 35b, and a detent mechanism (not shown). , The clutch mechanism, the index mechanism and the detent mechanism are built in a common body 37, and a bearing provided on the body 37 and the plate 7
The main gear 40 of the output shaft 39 supported by 38, 38 meshes with side gears 41a, 41b provided on the index mechanisms 35a, 35b, respectively.

Since the other structure of the second embodiment is the same as that of the first embodiment,
Detailed description is omitted.

In the second embodiment, when the clutch mechanism 34a is connected and 34b is disconnected and the swing actuator 33a is rotated, the side gear 41a and the main gear 40 mesh with each other, whereby the output shaft 38 rotates by a certain angle.

Next, when the clutch mechanism 34a is disconnected and 34b is connected to rotate the rocking actuator 33b and rotate the rocking actuator 33a in the opposite direction, the side gear 41b and the main gear 40 mesh with each other to further stabilize the output shaft 38. The swing actuator 33a returns to the original state by rotating in the same angle direction. Therefore, by repeating the above operation, the output shaft
39 rotates endlessly by a fixed angle.

Since the other operations of the second embodiment are the same as those of the first embodiment,
Detailed description is omitted.

The swing actuators 33a and 33b of the second embodiment do not necessarily have to have the same rotation angle, and the output shaft 25 is rotated once by the swing actuators 33a and 33b rotating once or a plurality of times. Anything will do.

In the second embodiment, by arranging two index motors in parallel, even when one of the swing actuators 33a and 33b rotates in the opposite direction, the other actuator can perform indexing.

[Advantages of the Invention] In the index motor of the present invention, since the index motor can be configured by attaching a body incorporating the index mechanism, the clutch mechanism and its detent mechanism to the swing actuator, the existing swing actuator can be used as it is. Therefore, the index motor can be made inexpensive.

Also, since the iddex mechanism, the clutch mechanism and the detent mechanism thereof are incorporated in the body, the index motor can be made compact.

Further, since the detent mechanism is a ball urged in the direction to be locked in the V groove by the spring, the detent mechanism can be made simple and small in size.

[Brief description of drawings]

1 is a longitudinal sectional view of a first embodiment of the present invention, FIGS. 2 and 3 are sectional views taken along the lines AA and BB of FIG. 1, and FIG. 4 is a partially simplified second view. It is a longitudinal cross-sectional view of an example. 1,33a, 33b …… Swing actuator, 2,35a, 35b …… Index mechanism, 3,34a, 34b …… Clutch mechanism, 4 …… Detent mechanism.

Claims (1)

[Claims] 1. A swing actuator, an endless rotatable index mechanism, and a fluid for intermittently transmitting the rotary swing of a shaft of the swing actuator to the index mechanism to rotate the index mechanism endlessly by a predetermined angle. In an index motor having a pressure-operated clutch mechanism and a detent mechanism for holding the rotational position of the index mechanism, a body is attached to the swing actuator, and the index mechanism, the clutch mechanism, and the detent are provided in the body. Incorporating a mechanism, the index mechanism is an index plate having a plurality of V grooves arranged on the outer peripheral surface at equal intervals, and the detent mechanism is urged by a spring in a direction to be locked in the V groove. An index motor that is characterized by: