JPH0715281B2 - Swing actuator with multi-point positioning mechanism - Google Patents

Description

TECHNICAL FIELD The present invention relates to a swing actuator capable of positioning a shaft at arbitrary plural positions of a rotary swing stroke.

[Prior Art] A swing actuator with a stopper mechanism capable of adjusting a rotary swing stroke of a shaft by a stopper provided so that a mounting position can be adjusted is already known, for example, from Japanese Utility Model Laid-Open No. 64-41705.

The known swing actuator can adjust the swing stroke of the shaft by changing the mounting position of the stopper, but cannot stop the shaft at the intermediate position of the swing stroke.

However, in the case of performing various works by the shaft, there is a demand for a swing actuator that can stop the shaft at an arbitrary position of the swing stroke in order to improve workability.

[Problems to be Solved by the Invention] An object of the present invention is to provide a swing actuator capable of stopping a shaft at a plurality of arbitrary positions of a swing stroke.

[Means for Solving the Problems] In order to solve the above problems, a swing actuator with a multipoint positioning mechanism of the present invention is a swing actuator that converts fluid pressure into rotational swing motion of a shaft. The stopper lever is attached so as to be integrally rotatable and the shell cover is relatively rotatable, and the stopper lever comes into contact with an arc-shaped first elongated hole provided around the shaft center of the shaft. The first stopper block is attached to the second elongated hole which is concentric with the first elongated hole and has an arcuate shape, and the second stopper block is attached along the elongated hole so that the mounting position can be adjusted. The rod with which the second stopper block abuts
The third stopper block, which is installed so as to be able to advance and retreat with respect to the long hole, and which is brought into contact with the shell cover, is mounted so that the mounting position can be changed along an arc centered on the shaft center.

[Operation] The supply and discharge of the pressure fluid causes the shaft and the stopper lever to rotate integrally, and when the stopper lever comes into contact with the first stopper block mounted in the first long hole of the shell cover, the shell cover rotates integrally with the shaft. Then, when the shell cover comes into contact with the third stopper block, the shaft stops.

Reversing the supply and discharge of pressure fluid also causes the shaft, stopper lever and shell cover to rotate in opposite directions.

In this case, the swing stroke of the shaft can be adjusted by changing the mounting position of the third stopper block.

When the rod is advanced to the second long hole during the rotation of the shaft, the second stopper block comes into contact with the rod to stop the shell cover and the stopper lever. When the rod is retracted from the second long hole, the shaft and the like further rotate in the same direction.

Also in this case, not only can the intermediate stop position be changed by adjusting the mounting positions of the first and second stopper blocks, but also the shaft can be moved in a plurality of positions by repeatedly moving the rod into and out of the second elongated hole. It can be stopped.

[Embodiment] FIGS. 1 to 3 show an embodiment of the present invention, in which a swing actuator 1 with a multipoint positioning mechanism includes a body 2 integrally connected and bodies 3, 4 having a larger diameter than the body 2. And a shaft 5 penetrating these bodies includes a body 2,
The pressure chamber formed in 3 has a vane that rotates and swings (both are not shown), and is rotatably supported by centering bearings 6 and 6 (only one is shown). However, the swing actuator of the present invention is not limited to the vane type, and may be any type as long as the shaft rotates and swings by supplying and discharging a pressure fluid such as compressed air.

On the body 4 side of the shaft 5, a stopper lever 7 is integrally rotatably mounted by a mounting bolt, and a shell cover 9 covering the lever 7 is rotatably mounted by bearings 10 and 10, respectively. The axial movement is restricted by the bearing nut 11 that is screwed onto the.

The shell cover 9 is provided with first and second concentric arc-shaped elongated holes 13 and 14 centered on the shaft center of the shaft 5, and these elongated holes have an enlarged diameter portion on the body 4 side. 14 expanded part 14
Both ends of a in the circumferential direction are open.

The first elongated hole 13 is formed at the rotational position of the tip end portion of the stopper lever 7, and the first stopper block 15a is attached to one end of the first elongated hole 13 by a nut so as to be able to advance and retreat with respect to the elongated hole 13. 15b is slotted with bolt 16 1
It is movable along 3 and is fixed so that it can be fixed at any position (see FIG. 3).
Stopper blocks 17a, 17b are attached by bolts 18a, 18b so as to be movable along the elongated holes 14 and fixable at arbitrary positions.

The body 4 has a pair of cylinder chambers (only one is shown) installed at intervals of 90 degrees, and the rods 21a and 21b of the piston 20 sliding in the cylinder chambers are the return springs 22 housed in the body 3. When it moves upward in the drawing by the urging force of (1), it advances to the inside of the expansion groove 14a (see FIG. 2), and when it moves downward in the drawing due to the supply of the pressure fluid to the port 23, it expands the expansion groove 14a.
Step back from a. Therefore, when the second stopper blocks 17a, 17b come into contact with the rods 21a, 21b that have moved forward, the shell cover 9 stops, and its position is the second stopper block.
It can be adjusted by the mounting position of 17a, 17b.

However, the forward / backward movement of the rods 21a, 21b is not limited to the fluid pressure operation, and the forward / backward movement can be performed by other driving force such as electromagnetic force.

A plurality of tap holes 25, ... Are formed on the upper surface of the body 4 along an arc centered on the shaft center of the shaft 5, and the shell cover 9 abuts on these tap holes.
The stopper blocks 26a, 26b are mounted by bolts 27, 27 so that the mounting positions can be changed.

In the above embodiment, the shaft 5 is rotated by the supply and discharge of the pressure fluid, and the stopper lever 7 moves the first stopper block 15a,
When abutting against 15b, the shell cover 9 rotates integrally with the shaft 5 in the same direction, and the second stopper blocks 17a, 17b move to the rods 21a, 21b advancing into the enlarged groove 14a of the second elongated hole 14. When abutting, the shell cover 9 and the shaft 5 stop at that position. When the rods 21a and 21b are retracted from the enlarged diameter groove 14a, the shaft 5 and the shell cover 9 rotate further in the same direction, and the shell cover 9 moves to the third stopper blocks 26a and 26b.
The rotation of the shaft 5 is stopped when it comes into contact with, and when the supply and discharge of the pressure fluid is reversed, the shaft 5 and the like similarly rotate in the opposite direction.

In this case, the swing stroke of the shaft 5 and the intermediate stop position can be arbitrarily set by adjusting and changing the mounting positions of the first to third stopper blocks.

4 and 5 show a specific example of setting the intermediate stop position of the shaft 5, and the rod marked with an X in these figures advances to a position where it abuts on the second stopper blocks 17a, 17b. It shows what is there.

FIG. 4 shows an example in which the shaft 5 is intermediately stopped in the range of 15 to 90 degrees (75 degrees in the figure). Since the stopper lever 7 is in contact with both the first stopper blocks 15a and 15b, the shaft 5 And the shell cover 9 always rotate together (see A).

When the shaft 5 rotates clockwise and the second stopper block 17a comes into contact with the advancing rod 21a, the shaft 5 and the shell cover 9 stop (see B), and when the rod 21a retreats, the shaft 5 and the like move. When the shell cover 9 further rotates in the same direction and comes into contact with the third stopper block 26a, the shaft 5 stops rotating (see C).

When the supply and discharge of the pressure fluid is reversed to rotate the shaft 5 counterclockwise, the second stopper block 17b comes into contact with the advancing rod 21b to stop the shaft 5 and the like (see D), and the rod 21b. When the shell cover 9 contacts the third stopper block 26b, the shaft 5 stops rotating (E).
reference).

In this case, the intermediate stop position of the shaft 5 can be adjusted by changing the mounting positions of the second stopper blocks 17a, 17b, and the shaft 5 can be adjusted by changing the mounting positions of the third stopper blocks 26a, 26b. The swinging stroke of the can be adjusted.

FIG. 5 shows an example in which the shaft 5 intermediately stops in the range of 90 to 135 degrees, and the distance between the first stopper blocks 15a and 15b is maximized (see A).

When the shaft 5 rotates clockwise and the stopper lever 7 comes into contact with the first stopper block 15a, the shell cover 9 rotates integrally with the shaft 5 in the same direction, and the second stopper block 17a advances. When the shaft 5 and the like stop when contacting the rod 21b (see B), when the rod 21b retracts, the shaft 5 and the shell cover 9 rotate further in the same direction, and when the shell cover 9 contacts the third stopper block 26a. The rotation of the shaft 5 stops (see C).

When the shaft 5 is rotated counterclockwise by reversing the supply and discharge of the pressure fluid, the stopper lever 7 contacts the first stopper block 15b and the shell cover 9 rotates integrally with the shaft 5 in the same direction. When the second stopper block 17b contacts the advancing rod 21b, the shaft 5 and the like stop (see D), and when the rod 21b retracts, the shaft 5 and the shell cover 9 further rotate in the same direction, and the shell cover 9 The rotation of the shaft 5 stops when it comes into contact with the third stopper block 26b (see E).

Also in this case, the intermediate stop position and the swing stroke of the shaft can be adjusted by changing the mounting positions of the second and third stopper blocks.

Further, in the above-described embodiment, the adjustment of the mounting position of each stopper block and the reciprocating of the rod are repeated, so that two steps are performed.
3 positions (Fig. 6A), 2 steps-4 positions (Fig. B), 3 steps-4 positions (Fig. C), 3
The position can be set to step-6 position (D in the figure) or the like, and in these cases, the angles can be adjusted except for the angle β in C and D in the figure.

EFFECTS OF THE INVENTION The swing actuator with a multipoint positioning mechanism of the present invention is
The oscillating shaft can be stopped multiple times at any position during rotation.

Further, both the swing stroke of the shaft and the intermediate stop position can be adjusted by changing the adjustment of the mounting positions of the first to third stopper blocks.

[Brief description of drawings]

1 shows a plan view, FIG. 2 shows a longitudinal sectional front view of an essential part, FIG. 3 is a sectional view taken along line AA of FIG. 1, and FIGS. FIG. 1 ... Rotating actuator, 5 ... Shaft, 7 ... Stopper lever, 9 ... Shell cover, 13,14 ... Long hole, 1
5a, 15b ... first stopper block, 17a, 17b ... second
Stopper block, 21a, 21b …… rod, 26a, 26b ……
Third stopper block.

Claims (1)

[Claims] 1. A swing actuator for converting a fluid pressure into a rotary swing motion of a shaft, wherein a stopper lever is integrally rotatable with the shaft, and a shell cover is relatively rotatable with the shaft. In addition, a first stopper block that contacts the stopper lever is provided in a circular arc-shaped first elongated hole centered on the shaft center, and a second circular arc-shaped elongated hole is concentric with the first elongated hole. The second stopper block is attached to each of the second stopper blocks so that the mounting position can be adjusted along the long hole, and the rod with which the second stopper block contacts the swing actuator can be moved forward and backward with respect to the second long hole. The third stopper block with which the shell cover abuts is mounted so that the mounting position can be changed along an arc centered on the shaft center of the shaft. Swing actuator with positioning mechanism.