JP2704220B2 - Vane type swing actuator with position detection mechanism - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vane type swing actuator having a position detecting mechanism.

[0002]

2. Description of the Related Art A vane-type swing actuator is provided with a position detecting mechanism for detecting a swing position of the vane. A known position detecting mechanism has a radial arm having a magnet attached to one end of a shaft of a vane type swing actuator so as to be integrally swingable, and has a circumferential switch mounting groove at one axial end of the body. Then, an adapter body surrounding the arm is mounted, and a magnetic proximity sensor is mounted in the switch mounting groove so as to be movable in a circumferential direction and fixed at an arbitrary position.

However, the known position detecting mechanism has a problem that the length of the vane-type oscillating actuator in the axial direction increases due to the arm attached to the tip of the shaft and the adapter body surrounding the arm.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a compact vane-type swing actuator having a position detecting mechanism.

[0005]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a pair of bodies, a vane hermetically inserted into a pressure chamber formed in the bodies so as to rotate and swing, and a shaft thereof. A vane type rocking actuator having a vane stopper and a position detecting mechanism for detecting the position of the vane, the vane-type oscillating actuator having a position detecting mechanism. A sensor mounting portion, and a circumferential gap for opening the sensor mounting portion on the outer peripheral surface of the body. The position detecting mechanism is provided along the object to be detected mounted on the vane and the sensor mounting portion. A position detection sensor that is movable and fixed at an arbitrary position and outputs a signal when the object to be detected approaches.

In order to solve the same problem, a sensor insertion portion for inserting a position detection sensor into the sensor attachment portion is provided in a sensor attachment portion formed in the body.

Further, in order to solve the same problem, these position detecting sensors include a sensor body loosely inserted in a sensor mounting portion and a sensor body loosely inserted in a gap.
The sensor is characterized in that the outer peripheral surface of the sensor body is substantially flush with the outer peripheral surface of the body.

[0008]

When the position detecting sensor is moved to a desired position of the sensor mounting portion along the circumferential sensor mounting portion formed on the opposing surface of the body and fixed at that position, it is mounted on the vane. The detected swinging position of the vane can be detected by the detected object and the position detection sensor. Therefore, since there is no need to provide an arm or an adapter body surrounding the arm, a vane-type swing actuator having a position detecting mechanism can be made compact. Further, the position detection sensor can be moved and fixed from outside the body by the gap provided in the sensor mounting portion, so that the position detection sensor can be easily moved and fixed.

Further, since the sensor insertion portion is provided in the sensor attachment portion, the position detection sensor can be inserted into and removed from the sensor attachment portion in a state where the pair of bodies are connected, so that maintenance of the position detection sensor is simple. Further, since the outer peripheral surface of the sensor main body inserted into the gap is made substantially the same as the outer peripheral surface of the body, damage to the sensor main body due to external force acting on the body can be prevented.

[0010]

FIG. 1 shows an embodiment of the present invention. A vane-type swing actuator 1 has a pair of bodies 3 and 4 integrally connected by mounting screws 2,. Pressure chambers 5, 5 formed (only one is shown)
A vane 6 and a shaft 7 for rotating and oscillating airtightly;
A permanent magnet as an example of the detection object 8 is mounted at a position near a radial end of the vane 6 and facing a groove described later.

As shown in detail in FIG. 4, on the opposing surfaces of the bodies 3 and 4, circumferential grooves 10, 10 each having a substantially semicircular cross section, and these grooves 10, 10 are provided on the body 3.
Steps 11, 11 are formed on the outer peripheral surfaces of the grooves 4, 4. The holes 12 have a substantially circular cross section formed by the grooves 10, and a gap 13 between the steps 11, 11.
Thus, a sensor mounting portion 15 for mounting the position detection sensor 14 is configured. Also, the sensor mounting part 1
A sensor insertion portion 16 for inserting the position detection sensor 14 into the sensor attachment portion 15 is formed at a position facing the stopper 5 (not shown). The detected object 8 attached to the vane 6 and the position detection sensor 14 inserted into the sensor attachment section 15 constitute a position detection mechanism.

The position detecting sensor 14 is shown in FIGS.
As shown in FIG. 5, a sensor body 18 having an arc shape having substantially the same diameter as the sensor mounting portion 15 and an arc-shaped sensor body 19 mounted on the outer peripheral surface of the sensor body 18 are provided. I have. The sensor body 18 and the lead wire 20 are movable along the sensor mounting portion 15, and the sensor body 19 is movable along the gap 13. Further, the outer peripheral surface of the sensor main body 19 is made substantially the same as the outer peripheral surfaces of the bodies 3 and 4, thereby preventing damage due to external force acting on the bodies. The sensor main body 19 in the above embodiment is configured as a magnetic proximity switch that outputs a signal when the detected object 8 approaches,
The signal output from the sensor main body 19 is transmitted to a desired location via the lead wire 20. Also, the sensor body 1
8, a fixing screw 21 (see FIG. 1) for fixing the sensor body to the sensor mounting portion is screwed.

However, the detected object 8 and the sensor main body 19 constituting the position detecting mechanism are not limited to the permanent magnet and the magnetic proximity switch. A high frequency transmission type proximity sensor that detects an induced current of the metal and outputs a signal may also be used. When the sensor body 19 is a magnetic proximity switch, the bodies 3 and 4 and the vane 6 are formed of a non-magnetic material. When the high frequency transmission type proximity sensor is used, the body is formed of a non-metallic material such as a synthetic resin. It is needless to say that the sensor body 19 is not affected by these materials.

In the above embodiment, the position detection sensor 14 is inserted into the sensor insertion portion 16 and the position detection sensor 14 is inserted into the gap 13 by an appropriate tool (not shown) such as a flathead screwdriver. Move in the direction
When the fixing screw 21 is rotated at a desired position, the tip of the fixing screw 21 presses the wall surface of the sensor mounting section 15, and the sensor body 18 is moved to the sensor mounting section 1.
5 is pressed against the opposite wall surface, so that the position detection sensor 14
Are fixed to the sensor mounting portion 15.

The vane-type oscillating actuator 1 comprises a body 3 and 4 in which a vane 6 and a stopper (not shown) are assembled in pressure chambers 5 and 5, and mounting bolts 2,.
Then, the position detection sensor 14 is inserted from the sensor insertion portion 16 and fixed at a desired position of the sensor attachment portion 15. Vane 6 from the port not shown
When compressed air is supplied to and exhausted from the pressure chamber defined by the pressure chamber and the stopper, the vane 6 rotates and swings. When the object 8 attached to the vane 6 approaches the sensor body 19, the sensor body 19 outputs a signal. The position of the vane 6 can be detected. Since the sensor insertion portion 16 is provided at a position facing the outer surface of the stopper, the position detection range of the vane 6 is not narrowed by the sensor insertion portion 16.

In the above-described embodiment, the detection object 8 is mounted on the vane 6 and the position proximity sensor 14 is inserted into the sensor mounting portion 15 formed on the surface facing the bodies 3 and 4, so that one end of the shaft 7 Since there is no need to provide a radial arm having the detection object 8 or an adapter body surrounding the arm, the length in the axial direction can be shortened. The dynamic actuator 1 can be made compact.

Further, the position detection sensor 14 can be moved or fixed to an arbitrary position of the sensor mounting portion 15 from the outside of the bodies 3 and 4 by the gap 13, so that the position detection sensor 14 can be moved and fixed. Is easy. Further, since the outer peripheral surface of the sensor body 19 and the outer peripheral surfaces of the bodies 3 and 4 are substantially the same, even if an external force acts on the swing actuator 1, the position detection proximity sensor 14 is not likely to be damaged.

[Brief description of the drawings]

FIG. 1 is a front view of an embodiment.

FIG. 2 is an exploded perspective view in which a position detection sensor is omitted.

FIG. 3 is a plan view of one body.

FIG. 4 is a longitudinal sectional view of a main part.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vane type rocking actuator 3, 4 Body 6 Vane 7 Shaft 8 Detected object 13 Gap 14 Position detection sensor 15 Sensor mounting part 16 Sensor insertion part 18 Sensor body 19 Sensor body

Claims (3)

(57) [Claims] 1. A pair of bodies, a vane inserted in a pressure chamber formed in the body so as to be rotatable and rotatable in an airtight manner, a shaft thereof, a stopper of the vane, and a position detecting mechanism for detecting a position of the vane. A vane-type oscillating actuator having a position detecting mechanism, comprising: a sensor mounting portion in a circumferential direction on one or both of the opposing surfaces of the pair of bodies; and an outer peripheral surface of the body. A gap in the circumferential direction to be opened at the position, the position detection mechanism is attached to the object to be detected attached to the vane and the sensor attachment portion so as to be movable and fixed at an arbitrary position; A vane-type swing actuator having a position detection mechanism, comprising: a position detection sensor that outputs a signal when an object to be detected approaches. 2. A sensor insertion part for inserting a position detection sensor into the sensor attachment part in the sensor attachment part.
A vane-type swing actuator having the position detection mechanism according to claim 1. 3. A position detecting sensor comprising: a sensor body loosely inserted in a sensor mounting portion; and a sensor body loosely inserted in a gap, wherein an outer peripheral surface of the sensor main body is substantially flush with an outer peripheral surface of the body. A vane-type swing actuator having the position detection mechanism according to claim 1 or 2.