JPH0624561Y2 - Rotarian reactor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a rotary actuator, and more particularly to a rotary actuator in which the impact of a swing member and a stopper portion is buffered.

[Prior Art] A rotary actuator includes a swing member that is swung along with the swing motion of an output shaft, and a stopper member with which the swing member abuts, and a fixed position of the stopper member. It is conceivable that the swing angle of the output shaft is adjusted by arbitrarily changing the.

Further, in such a rotary actuator, in order to buffer the impact between the swing member and the stopper member,
It is conceivable to fix an elastic member such as rubber to the rocking member or the stopper member by baking or bonding means.

[Problems to be Solved by the Invention] However, when the elastic member is fixed to the swing member as in the rotary actuator described above, when the elastic member is replaced due to wear or damage of the elastic member. However, there is a problem that the replacement becomes difficult.

Moreover, since the elastic member is fixed to the swing member, it is difficult to completely remove the elastic member. Due to the difficulty of removing the elastic member, if the elastic member is replaced without being completely removed, the elastic member after replacement is fixed to the swinging member in a deformed state due to the remaining portion of the elastic member. However, there is a problem that the proper contact state between the swinging member and the stopper member and the reliable cushioning action of the elastic member are impaired during the operation after the elastic member is replaced.

An object of the present invention is to provide a rotary actuator in which the elastic member can be easily and reliably replaced and can be operated normally even after the elastic member is replaced.

[Means for Solving the Problems] The rotary actuator of the present invention includes a swinging member that is swung together with the swinging motion of the output shaft, and a swinging member that abuts on the swinging member. A stopper member for stopping the movement,
A magnetism generating means provided on the rocking member, a magnetic sensor for detecting the position of the magnetism generating means, and a detachable mount on the rocking member for buffering the collision between the magnetism generating means and the stopper. And an elastic member for fixing the magnetism generating means to the swing member.

[Operation] According to the above-mentioned means, since the elastic member is detachably provided on the swinging member, when the elastic member is replaced due to wear or damage of the elastic member, the replacement is easy and reliable. It can be carried out.

Further, since the elastic member is detachably provided, the elastic member can be completely removed and replaced, and therefore, the elastic member after replacement may be deformed by the remaining portion of the elastic member before replacement. Therefore, it is possible to obtain a proper contact state between the swinging member and the stopper member and a reliable cushioning action by the elastic member during the operation after the elastic member is replaced.

Further, since the magnetism generating means detected by the magnetic sensor is fixed to the rocking member by the elastic member, the elastic member may be used as a fixing member without using a member for fixing the magnetism generating means. Can be shared.

[Embodiment] FIG. 1 is a plan view showing a rotary actuator according to an embodiment of the present invention, and FIG. 2 is a partial cross-sectional view of the rotary actuator seen from the direction of the line II-II in FIG. FIG. 3 is a perspective view showing a swing member and an elastic member of the rotary actuator shown in FIG.

The rotary actuator of this embodiment is a vane type rotary actuator.

A cover 2 made of a transparent material such as a transparent resin is capped on the upper part of the actuator body 1.
Are removably fixed to the ring-shaped base 3 with screws (not shown).

The output shaft 4 penetrates the shaft center of the actuator body 1, and the upper end side of the output shaft 4 projects into the cover 2. An arm (oscillating member) is provided at the protruding portion of the output shaft 4.
5 are attached by bolts 5a and extend in the radial direction of the output shaft 4, and the arm 5 is entrained in the swing of the output shaft 4 to maintain the same positional relationship with the vanes (not shown),
It is structured to be swung along the circumferential direction of.

As shown in FIG. 3, a groove 5b for magnet fitting is formed on the upper surface of the arm 5 on the free end side, and a magnet (magnetism generating means) 6 for a magnetic sensor is fitted in this groove 5b. Further, recesses 5c, 5c for fitting an elastic member are formed on both side surfaces of the arm 5 on the free end side.

A cap-shaped elastic member 7 made of rubber or resin is detachably capped and attached to the free end side of the arm 5 having such a structure by utilizing its elastic deformation. As one means for attaching the fitting member, the elastic member 7 has a fitting hole 7a having substantially the same shape as the shape of the free end side of the arm 5, that is, a fitting convex portion 7b corresponding to the concave portion 5c. A joint hole 7a is formed.

In the elastic member 7, the free end side of the arm 5 is pushed into the fitting hole 7a by utilizing the elastic deformation of the elastic member 7, and the convex portion 7 is formed.
b is fitted in the recess 5c and is detachably capped on the free end side of the arm 5.

The magnet 6 is prevented from being detached from the groove 5b by the cap of the elastic member 7 on the arm 5.

A ring groove 3a is formed on the upper surface of the ring-shaped base 3 along the circumferential direction thereof.

In the ring groove 3a, a pair of stopper members (stopper portions) 8 with which the arm 5 abuts is provided so as to be movable and its moving position fixed, and the swing angle of the output shaft 4 and the arm 5 is the stopper. The structure is such that it can be adjusted by changing the fixed positions of the members 8, 8.

Further, the bottom surface 3b of the ring groove 3a is formed in a sloped surface shape that gradually descends from the contact point of the arm 5 with the stopper members 8 and 8 in the direction away from the stopper members 8 and 8. ing. That is, in FIG.
It is formed in a sloped surface that gradually descends from the upper side to the lower side.

Further, on the bottom surface 3b of the ring groove 3a, a pair of substantially semi-ring-shaped elongated holes 3d having a locking step portion 3c for locking a nut are formed along the circumferential direction. The stopper members 8 and 8 have ring grooves 3a and 3a formed by fastening bolts 9a and nuts 9b respectively inserted into the long holes 3d and 3d.
Each of them is fixed to a and can be moved by being guided by the ring groove 3a and the elongated hole 3d by loosening the bolt 9a.

Similarly to the ring groove 3a, the bottom surface 8a of the stopper member 8 is also formed into a sloped surface. The bottom surface 8 of this stopper member 8
Like the bottom surface 3b of the ring groove 3a, a is inclined along the circumferential direction of the output shaft 4, and its inclination angle is the same as the inclination angle of the bottom surface 3b of the ring groove 3a.

Then, the ring groove 3a formed in such a sloped surface shape
The bottom surface 3b of the stopper member 8 and the bottom surface 8a of the stopper member 8 are bolts 9a.
By being pressed by the fastening of the nut 9b with
The stopper member 8 is firmly fixed to the ring groove 3a so that the stopper member 8 is securely prevented from being displaced due to the impact of the arm 5.

On the other hand, in the rotary actuator of this embodiment, in order to detect the swing amount, swing position, etc. of the output shaft 4 and vanes (not shown), the upper portion of the cover 2 is indicated by the one-dot chain line in FIG. Sensor mounting members 10, 10 are provided at the center so as to be swingable by a position adjusting member 11 and each swing position can be fixed at an arbitrary position.

The magnetic sensor 10 is attached to the sensor mounting members 10, 10.
a and 10a are attached to the magnetic sensors 10a and 1a, respectively.
0a is formed by a reed switch that opens and closes depending on the presence or absence of the magnetic action of the magnet 6, and
b extends to the outside.

Then, when the magnet 6 approaches the one magnetic sensor 10a when the arm 5 swings, the magnetic sensor 10a is sensed by the magnetic action of the magnet 6, so that the output shaft 4 and the vane (not shown). The structure is such that the rocking position, the rocking amount, etc. are detected.

Next, the operation of this embodiment will be described.

First, the cover 2 is removed from the actuator body 1.

Next, the bolts 9a are loosened to move the stopper members 8 and 8 along the elongated holes 3d and 3d, respectively, to the required positions where the swing angles of the output shaft 4 and the vanes (not shown) should be adjusted. Deploy. That is, the stopper members 8 are respectively arranged at positions which should be the start point and the end point of the swing of the vane (not shown).

After this arrangement, the bolts 9a are tightened to fix the stopper members 8,8.

On the other hand, if the magnetic sensor 10a is to detect the start point and the end point of the swing of a vane (not shown), the sensor mounting members 10 and 10 are arranged at the positions corresponding to the start point and the end point. And fix it. In this case, since the cover 2 is formed so as to be transparent, the arms 5 and the like inside the cover 2 can be visually recognized, so that the positions of the sensor mounting members 10 and 10 can be set easily and reliably. .

Such a stopper member 8 and a sensor mounting member 10
When the vane (not shown) is swung after setting, the output shaft 4 and the arm 5 are swung together. The elastic member 7 of the oscillated arm 5 is brought into contact with the stopper member 8 on the oscillating direction side to be stopped. Next, the arm 5 accompanies the swing of the output shaft 4 in the opposite direction, and swings until the elastic member 7 comes into contact with the stopper member 8 on the swing direction side.

Therefore, the swing angle of the output shaft 4, vanes (not shown) and the like is adjusted by the elastic members 7 of the arms 5 alternately contacting and stopping the stopper members 8 and 8.

Further, at the time of this swing, the stopper members 8 and 8 have their bottom surfaces 8
Since a and the bottom surface 3b of the ring groove 3a are in contact with each other at an inclination, they are firmly fixed to the ring groove 3a, so that the stopper member 8 can be reliably prevented from being displaced due to the impact of the arm 5. If the rocking speed is high or the object to be rocked by the rotary actuator is too large,
The impact force generated between the arm 5 and the stopper member 8 becomes excessive, and the adverse effect on the oscillated object due to the vibration or the like caused by this impact force is unavoidable. Therefore, the cushioning action by the elastic member 7 is necessary. Further, the displacement of the stopper member 8 at the time of this impact can be surely prevented also by the cushioning action of the elastic member 7. Further, since the elastic member 7 is capped on the arm 5 of the magnet 6 of the arm 5, the magnet 6 is reliably prevented from being detached from the groove 5b at the time of the impact.

On the other hand, when the arm 5 swings, the magnet 6 of the arm 5
When approaching the magnetic sensors 10a, 10a, the magnetic action of the magnet 6 causes the magnetic sensors 10a, 10a.
By sensing a, it is possible to detect the swing position, swing amount, etc. of the output shaft 4, vanes (not shown), and the like.

Next, when the elastic member 7 is replaced due to wear or damage of the elastic member 7, the elastic member 7 is detachably capped on the free end side of the arm 5 by utilizing its elastic deformation. Therefore, by pulling out the free end side of the arm 5 from the fitting hole 7a of the elastic member 7 and pushing the free end side of the arm 5 into the fitting hole 7a of the new elastic member 7, the elastic member 7 can be easily and surely attached. Can be exchanged.

Further, since the elastic member 7 is detachably capped on the free end side of the arm 5 by utilizing its elastic deformation, the elastic member 7 can be completely removed and replaced.
There is no fear that the elastic member 7 after replacement will be deformed by the remaining portion of the elastic member 7 before replacement, and therefore, when the elastic member 7 is operated after replacement of the elastic member, the arm 5 and the stopper member 8 are properly contacted and elastic. A reliable cushioning effect of the member 7 can be obtained.

The present invention has been specifically described above based on the embodiments, but the present invention is not limited to the above-mentioned embodiments, and it goes without saying that various modifications can be made without departing from the scope of the invention.

Further, although the elastic member 7 in this embodiment is formed in a cap shape having a rectangular tubular cross section, the elastic member 7 in the present invention is formed.
Is not limited to such a shape, and it is also possible to use an elastic member in which a notch extending in the longitudinal direction is formed on the bottom surface of the elastic member 7 as in this embodiment, for example.

Further, in this embodiment, as one means for freely attaching the elastic member 7 to the arm 5, the concave portions 5c formed on both surfaces of the arm 5 and the concave portions 5c formed on both inner surfaces of the fitting hole 7a.
However, it is also possible to use, for example, a recess formed on the upper surface of the arm 5 on the distal end side and a projection formed on the upper surface of the inner surface of the fitting hole 7a.

Further, in this embodiment, the groove 5b is formed in the arm 5 and the magnet 6 is fitted in the groove 5b. For example, a hole extending in the axial direction is formed in the upper part of the tip end surface of the arm 5. It is also possible to adopt a structure in which the magnet 6 is inserted into the hole.

Further, the stopper member 8 and the magnetic sensor 1 according to the present embodiment.
A plurality of 0a are provided, but a single number is also possible.

Furthermore, if the present invention is an actuator having a swing shaft,
Not only the so-called vane type, but also widely applicable to rack-and-pinion type rotary actuators and the like.

[Advantage of the Invention] According to the present invention, a swing member that is swung along with the swing motion of the output shaft, and a stopper member that abuts on the swing member and stops the swing of the swing member. A magnetism generating means provided on the rocking member, a magnetic sensor for detecting the position of the magnetism generating means, and a detachable mount on the rocking member to prevent collision between the magnetism generating means and the stopper member. The following effects can be obtained by adopting a structure having an elastic member that buffers and fixes the magnetism generating means to the swing member.

(1). Since the elastic member is detachably provided on the swing member, when the elastic member is replaced due to wear or damage of the elastic member, the replacement can be easily and surely performed.

(2). Since the elastic member is detachably provided, the elastic member can be completely removed and replaced, so that the elastic member after replacement is denatured by the remaining portion of the elastic member before replacement. Therefore, it is possible to obtain a proper contact state between the swinging member and the stopper member and a reliable cushioning action by the elastic member during the operation after the elastic member is replaced.

(3) Due to the effect of (1), the durability of the rotary actuator can be improved.

(4) Due to the effect of (2), it is possible to improve the operational reliability of the rotary actuator after the elastic member is replaced.

(5). The elastic member can be detachably provided on the swing member by utilizing the elastic deformation.

(6) It is possible to prevent the magnetic generation means from being fixed or separated by the elastic member.

[Brief description of drawings]

FIG. 1 is a plan view showing a rotary actuator which is an embodiment of the present invention, FIG. 2 is a partial sectional view with a part omitted as viewed from the direction of the line II--II in FIG. 1, and FIG. FIG. 3 is a perspective view showing a swing member and an elastic member of the rotary actuator shown in FIG. 1. 1 ... Actuator body, 2 ... Cover, 3 ... Base, 3a ... Ring groove, 3b ... Ring groove bottom surface, 3c ... Lock step, 3d ... Long hole, 4 ... Output shaft, 5 ... Arm (oscillating member), 5a ... Bolt, 5b ... Groove, 5c ... Recessed portion, 6 ... Magnet (magnetism generating means), 7 ... Elastic member, 7a ... Fitting hole, 7b ... ... Convex part, 8 ... Stopper member (stopper part), 8a ... Bottom surface of stopper member, 9a ... Bolt, 9b ... Nut, 10 ... Sensor mounting member, 10a ... Magnetic sensor, 10b ... Lead Line, 11 ... Position adjustment member.

Claims (3)

[Scope of utility model registration request] 1. A swing member that is swung together with a swing motion of an output shaft, a stopper member that abuts on the swing member to stop swing of the swing member, and the swing member. And a magnetic sensor for detecting the position of the magnetic generation means, and a magnetic sensor that is detachably attached to the swing member to buffer the collision between the magnetic generation means and the stopper member and to generate the magnetic field. An elastic member for fixing the means to the swing member. 2. The rotary actuator according to claim 1, wherein the elastic member is formed in a cap shape, and the elastic member is capped on the free end of the swinging member. . 3. The utility model registration claim, wherein the stopper member is movably provided along a swing locus of the swing member, and the movement can be fixed at an arbitrary moving position. The rotary actuator according to item 1.