KR101102675B1

KR101102675B1 - Rotational actuator

Info

Publication number: KR101102675B1
Application number: KR1020100105075A
Authority: KR
Inventors: 김호성
Original assignee: 대성전기공업 주식회사
Priority date: 2010-10-27
Filing date: 2010-10-27
Publication date: 2012-01-05

Abstract

The present invention relates to a rotary actuator, comprising: a plurality of stator cores arranged at regular intervals in a circumferential direction, a stator coil wound around each stator core, and a fan-shaped core shoe extending at at least one end of each stator core. a stator having a core shoe; A rotor having a disk-shaped rotor yoke disposed axially spaced from the stator, and a circular magnet attached to the stator side surface of the rotor yoke and maintained in a fine gap with the core shoe; A rotating shaft supporting the rotation of the rotor relative to the stator by axially penetratingly coupled to the center of the rotor; And a disk-shaped lower plate coupled to one end of the rotating shaft and having an outer circumference of one surface thereof, the disk-shaped lower plate of which a plurality of tooth grooves form a circle, and a surface facing the surface on which the tooth groove of the lower plate is formed and inserted into the tooth groove part. And a stopper having a corrugated latch and an upper plate fixedly supporting the corrugated latch and being pressed against the lower plate through a plate surface. Thereby, it is possible to reduce the current consumption for position control of the rotor and to simply configure the control circuit.

Description

ROTATIONAL ACTUATOR

The present invention relates to a rotary actuator that is rotationally driven by a predetermined angle unit for opening and closing the valve.

In general, a conventional rotary actuator is disclosed in US Patent Application Publication No. 2008/0197728 "ROTARY SINGLE-PHASE ELECTROMAGNETIC SERVO ACTUATOR COMPRISING AN ACTUATOR AND A POSITION SENSOR" (published: 2008.08.21), and the like. A core shoe 32 extending in a fan shape on a core 11 and an upper end thereof on a stator 10 side, and a stator coil wound around each core 11, as shown in FIG. A coil 33 is provided and a rotor yoke 13 and a magnet 14 attached to the lower surface thereof are provided on the rotor 9 side.

As a result, the rotor 9 rotates in a desired direction by applying a current in a different direction to each pair using two neighboring stator coils 33 as a pair.

By rotating the rotor 9, as shown in FIG. 1, a valve (not shown) integrally coupled with the shaft 43 is rotated to achieve opening and closing of the valve.

However, according to the conventional rotary actuator as described above, there is a problem that a large amount of current is consumed to generate a torque for holding the rotor 9 fixed at an angle.

An object of the present invention to provide a rotary actuator that can reduce the current consumption for the position control of the rotor.

In order to achieve the above object, the present invention provides a plurality of stator cores disposed at regular intervals in a circumferential direction, a stator coil wound around each stator core, and extending at least one end of each stator core. A stator having a fan-shaped core shoe; A rotor having a disk-shaped rotor yoke disposed axially spaced from the stator, and a circular magnet attached to the stator side surface of the rotor yoke and maintained in a fine gap with the core shoe; A rotating shaft supporting the rotation of the rotor relative to the stator by axially penetratingly coupled to the center of the rotor; And a disk-shaped lower plate coupled to one end of the rotating shaft and having an outer circumference of one surface thereof, the disk-shaped lower plate of which a plurality of tooth grooves form a circle, and a surface facing the surface on which the tooth groove of the lower plate is formed and inserted into the tooth groove part. And a stopper having a corrugated latch and an upper plate that supports and supports the corrugated latch and is pressed against the lower plate at the same time through the plate surface.

In order to achieve the above object, the present invention, in the rotary actuator, a plurality of stator cores arranged at regular intervals in the circumferential direction, a stator coil wound around each stator core, and extending to at least one end of each stator core A stator having a fan-shaped core shoe formed; A rotor having a disk-shaped rotor yoke disposed axially spaced from the stator, and a circular magnet attached to the stator side surface of the rotor yoke and maintained in a fine gap with the core shoe; A rotating shaft supporting the rotation of the rotor relative to the stator by axially penetratingly coupled to the center of the rotor; And a lower plate coupled to one end of the rotating shaft, a waveform clamp fixedly supported by the plate surface of the lower plate and having one or more protrusions formed on a surface thereof, and a plurality of tooth grooves having the one or more protrusions inserted into an outer circumference thereof. And a stopper having a disk-shaped upper plate fixed in a pressed state against the corrugated latch.

In the above, the stop torque generated by the insertion coupling between the tooth groove portion of the stopper and the protrusion of the corrugated latch may be set smaller than the drive torque of the rotor of the stator.

On the other hand, in order to achieve the above object, the present invention, in the rotary actuator, a plurality of stator cores arranged at regular intervals in the circumferential direction, a stator coil wound around each stator core, and extending to at least one end of each stator core A stator having a fan-shaped core shoe formed; A rotor having a disk-shaped rotor yoke disposed axially spaced from the stator, and a circular magnet attached to the stator side surface of the rotor yoke and maintained in a fine gap with the core shoe; A rotating shaft supporting the rotation of the rotor relative to the stator by axially penetratingly coupled to the center of the rotor; And a disk-shaped lower plate which is coupled to one end of the rotating shaft and protrudes from the outer circumferential surface of one surface to form a circle to form a circle, and is fixed in the rotational direction of the rotating shaft and has the outer circumferential first surface of the lower plate. And a stopper having a disk-shaped upper plate that is protrudingly formed to form a circle, and elastic pressing means for elastically pressing the upper plate against the lower plate. Provides a rotary actuator.

Here, the stop torque generated due to the coupling between the first and second teeth of the stopper may be set smaller than the drive torque of the rotor of the stator.

According to the rotary actuator according to the present invention as described above, since the fixing force for preventing free rotation of the rotor can be obtained through the stop torque generated by the stopper, the current required to fix the angle of the rotor can be greatly reduced.

Accordingly, the control circuit for the current applied to the stator coil can also be omitted or simplified since the function for the angle fixing of the rotor can be configured more simply than the conventional control circuit.

1 is a perspective view showing a conventional rotary actuator,
FIG. 2 is a partially engaged perspective view of an essential part of the rotary actuator of FIG. 1; FIG.
3, 4 and 5 are a longitudinal sectional view, a perspective view and a partially cut perspective view of the main portion of the rotary actuator according to an embodiment of the present invention,
6 and 7 are a perspective view and an exploded perspective view showing a first embodiment of the stopper applied to the rotary actuator of FIG.
8 and 9 are combined perspective and exploded perspective views showing a second embodiment of the stopper applied to the rotary actuator of FIG.

The rotary actuator 100 according to the embodiment of the present invention, as shown in Figure 3, the stator 110, a pair of rotors 120, 130 disposed on the upper and lower sides of the stator 110, the upper and lower It comprises a rotary shaft 140 penetrating through the rotor (120, 130) integrally, a stopper (150 of FIG. 6) coupled to the upper end of the rotary shaft 140, a part of the configuration.

The stator 110 extends in a plurality of stator cores 111 disposed at regular intervals in the circumferential direction, stator coils 112 wound around each stator core 111, and upper and lower ends of each stator core 111. And a fan shaped core shoe 113, 114 (see FIG. 4) to be formed.

In the present embodiment, the stator core 111, the stator coils 112, and the like, as shown in Figs. 4 and 5, are arranged at regular intervals of 90 degrees in the circumferential direction are provided with four each.

The upper rotor 120 is attached to the disk-shaped rotor yoke 121 which is spaced apart from the stator 110 in the axial direction, and is attached to the lower surface of the rotor yoke 121 to form a fine gap with the core shoe 113. It is provided with a circular magnet 122 is maintained.

Since the lower rotor 130 is configured symmetrically in the same manner as the upper rotor 120, a description thereof will be omitted.

On the other hand, the rotor 120, 130 in the present embodiment has been described as being provided with two up and down, but the rotary actuator according to the present invention is not limited to this configuration, even if only one rotor (120 or 130) is provided The same may apply.

In addition, the present invention is also applicable to the configuration of the rotary actuator according to the prior art, including the patent cited in the background art.

Since the driving method between the stator 110 and the rotors 120 and 130 having the above configuration is substantially the same as in the case of the related art, a detailed description thereof will be omitted herein.

The rotating shaft 140 is axially coupled to the center of each of the rotors 120 and 130 to support rotation of the rotors 120 and 130 with respect to the stator 110.

On the other hand, the stopper 150 is divided into a lower plate 151, a waveform latch 152, and an upper plate 153, as shown in FIGS. 6 and 7.

The lower plate 151 rotates integrally with the rotors 120 and 130 and the rotation shaft 140, and the waveform tuck 152 and the upper plate 153 are maintained in a relatively fixed state with respect to the stator 110.

The disk-shaped lower plate 151 is coupled to the upper end of the rotation shaft (140 in FIG. 3) through the central hole h, as shown in FIG. 7, and a plurality of tooth grooves on the outer circumference of the upper plate surface. 151a is formed and forms a circle.

Corrugated latch 152 is a circular plate spring is formed in the left and right ends of the elastic member formed so that the front and rear ends are bent in the upward direction to add an elastic force in the axial direction.

At this time, protrusions 152a are formed on the left and right lower plate surfaces of the corrugated latch 152 so as to correspond to the tooth grooves 151a of the lower plate 151.

Therefore, when the corrugated latch 152 is placed on the lower plate 151, the protrusion 152a is inserted into the tooth groove 151a.

The disk-shaped upper plate 153 is attached to and fixed to the plate surface 152b at the front and rear ends of which the lower plate surface is bent upward of the corrugated latch 152.

As such, the upper plate 153 having the corrugated latch 152 attached to the bottom surface supports and presses the corrugated latch 152 to close the left and right fastening grooves 153a in a state of being in close contact with the lower plate 151. It is coupled to the housing (not shown) through the position is fixed.

According to the stopper 150 having such a configuration, when the rotors 120 and 130 are fixed by rotating, the tooth grooves 151a of the lower plate 151 are caused by the axial elastic deformation of the corrugated latch 152. And the circumferential coupling force between the protrusions 152a of the corrugated latch 152 acts to generate a stop torque that acts to maintain a fixed position after rotation of the rotors 120 and 130. do.

At this time, the stop torque generated due to the insertion coupling between the tooth groove 151a of the lower plate 151 and the protrusion 152a of the corrugated latch 152 may include a rotor 120 through application of current to the stator coil 112. 130) and the rotation shaft 140, etc. should not be hindered, it is preferable to set less than the drive torque for the drive.

Accordingly, according to the stopper 150 as described above, since the current consumption for fixing the position of the rotors 120 and 130 may be reduced or the power may be turned off at all, the current consumption required for driving the actuator 100 may be reduced. Can be reduced.

On the other hand, in the above it is described that the tooth groove 151a is provided on the lower plate 151 and the corrugated latch 152 is fixedly supported on the upper plate 153 which is a fixed side, but the rotary actuator according to the present invention is limited to this configuration. The tooth groove 151a may be formed to form a circle with the outer circumference of the lower plate surface of the upper plate 153.

In this case, the corrugated latch 152 is formed with the protrusion 152a on the upper surface thereof, and the lower plate 151 is a simple disk to fix and support the corrugated latch 152 through its upper plate surface.

On the other hand, the stopper 150 has a configuration of the lower plate 251, the upper plate 253 and the elastic pressing means (not shown in the drawings, see the arrows of Figures 8 and 9) as shown in FIGS. It may be replaced by the stopper 250.

8 and 9, a plurality of first teeth 251a protrude from the outer circumference of the upper surface of the lower plate 251 to form a circle, and correspondingly, the lower surface of the upper plate 253 has a large number. The second tooth portion 253a is formed to protrude.

The first tooth portion 251a and the second tooth portion 253a are engaged with each other by elastic pressing means such as a coil spring for pressing the upper plate 253 downward.

To this end, the top plate 253 is fastened to the housing (not shown) but should be in a state capable of a certain amount of flow in the vertical direction.

According to the stopper 250 having such a configuration, when the rotors 120 and 130 are fixed by rotating, the first teeth of the lower plate 251 due to the action of the elastic pressing means (see arrows in FIG. 8). The coupling force in the circumferential direction by the insertion coupling between the mold portion 251a and the second tooth portion 253a of the upper plate 253 acts to maintain the fixed position after the rotation of the rotors 120 and 130. Stop torque is generated.

In this case, since the stop torque should not interfere with the driving of the rotors 120 and 130 and the rotating shaft 140 through the application of the current to the stator coil 112, it is preferably set less than the driving torque for the driving.

On the other hand, since the rotary actuator 100 and the stopper (150, 250) described above is only one embodiment for aiding the understanding of the present invention, the scope of the present invention to the technical scope is limited to those described above It is difficult to be.

The scope of the invention to the technical scope is defined by the claims and equivalents described below.

100: rotary actuator 110: stator
111: stator core 112: stator coil
113, 114: core shoe 120, 130: rotor
121: rotor yoke 122: magnet
140: rotation axis 150: stopper
151: lower plate 151a: tooth groove
152: waveform latch 152a: projection
153: top 250: stopper
251: Lower plate 251a: First teeth
253: top plate 253a: second tooth portion

Claims

In a rotary actuator,
A stator having a plurality of stator cores arranged at regular intervals in the circumferential direction, a stator coil wound around each stator core, and a fan-shaped core shoe extending at at least one end of each stator core;
A rotor having a disk-shaped rotor yoke disposed axially spaced from the stator, and a circular magnet attached to the stator side surface of the rotor yoke and maintained in a fine gap with the core shoe;
A rotating shaft supporting the rotation of the rotor relative to the stator by axially penetratingly coupled to the center of the rotor; And
Waveforms formed on the outer periphery of one side of the rotation shaft and the outer periphery of the one side surface of the disk-shaped lower plate constituting a circle, and at least one protrusion facing the surface formed with the tooth groove of the lower plate and inserted into the tooth groove And a stopper having a latch and an upper plate that supports and supports the corrugated latch through the plate surface and simultaneously presses against the lower plate.

In a rotary actuator,
A stator having a plurality of stator cores arranged at regular intervals in the circumferential direction, a stator coil wound around each stator core, and a fan-shaped core shoe extending at at least one end of each stator core;
A rotor having a disk-shaped rotor yoke disposed axially spaced from the stator, and a circular magnet attached to the stator side surface of the rotor yoke and maintained in a fine gap with the core shoe;
A rotating shaft supporting the rotation of the rotor relative to the stator by axially penetratingly coupled to the center of the rotor; And
A lower plate coupled to one end of the rotating shaft, a waveform clamp fixedly supported by the plate surface of the lower plate and having one or more protrusions formed on a surface thereof, and a plurality of tooth grooves into which the one or more protrusions are inserted into an outer circumference thereof, And a stopper having a disk-shaped upper plate fixed in a pressed state against the corrugated latch.

The method according to claim 1 or 2,
And a stop torque generated by the insertion coupling between the stopper of the stopper and the protrusion of the corrugated stopper is smaller than the drive torque of the rotor of the stator.

In a rotary actuator,
A stator having a plurality of stator cores arranged at regular intervals in the circumferential direction, a stator coil wound around each stator core, and a fan-shaped core shoe extending at at least one end of each stator core;
A rotor having a disk-shaped rotor yoke disposed axially spaced from the stator, and a circular magnet attached to the stator side surface of the rotor yoke and maintained in a fine gap with the core shoe;
A rotating shaft supporting the rotation of the rotor relative to the stator by axially penetratingly coupled to the center of the rotor; And
Coupled to one end of the rotary shaft and the outer periphery of one surface, a plurality of first teeth protruding to form a disk-shaped lower plate, and the first tooth of the lower plate fixed in the rotational direction of the rotary shaft And a stopper having a disk-shaped upper plate which is protrudingly formed to form a circle, and an elastic pressing means for elastically pressing the upper plate against the lower plate. Typical actuator.

The method of claim 4, wherein
And a stop torque generated by engagement between the first and second teeth of the stopper is less than the drive torque for the rotor of the stator.