WO2013183278A1

WO2013183278A1 - Actuator

Info

Publication number: WO2013183278A1
Application number: PCT/JP2013/003491
Authority: WO
Inventors: 望月　廣昭; 宏臣栗林; 彰斗金子
Original assignee: Thk株式会社
Priority date: 2012-06-05
Filing date: 2013-06-03
Publication date: 2013-12-12

Abstract

This actuator (10) has: a housing (11) attached to a base that serves as an installation reference; a drive power generation means (21) that generates drive power; an operating shaft (31) protruding to the one side and the other side of the housing (11); and a drive power transmission means that transmits the drive power generated by the drive power generation means (21) to the operating shaft (31). The one shaft end (31a) of the operating shaft (31) protruding to the one side of the housing (11) and the other shaft end (31b) of the operating shaft (31) protruding to the other side of the housing (11) receive drive power and undergo coaxial reciprocal linear movement in the same direction or in opposite directions. Furthermore, a position movement means (41) that shifts the position of the housing (11) with respect to the base is provided in order to accommodate the acting component of the accompanying movement produced in the housing (11) when the shaft end (31a) on the one side and the shaft end (31b) on the other side exert operating force with respect to separate operation-receiving objects. Thus, operating force can be exerted with respect to multiple different operation-receiving objects by means of one actuator.

Description

Actuator

The present invention relates to an actuator that exerts an acting force on an object by the action of an acting shaft.

Conventionally, as this type of actuator, as disclosed in Patent Document 1 below, one acting shaft is operated by a driving source such as an electric motor to exert an acting force on an external subject. It was general. Therefore, for example, when it is desired to exert an acting force on a plurality of different objects, it is necessary to install a plurality of actuators on a one-to-one basis according to each object.

JP 2002-266975 A

However, in the case where a plurality of objects are present in relatively close proximity, it is economical if one actuator can exert an acting force on the plurality of objects. In addition, when it is desired to operate a plurality of objects in a synchronized state, if a plurality of actuators are installed on a one-to-one basis according to each object, it is necessary to perform synchronization control between the plurality of actuators. There is room for improvement in control difficulty and cost. Therefore, this type of actuator has been required to have a technique that can apply an acting force to a plurality of different objects by one actuator.

Moreover, in the conventional actuator represented by the above-mentioned Patent Document 1, when an overload or impact load is applied to the working shaft that exerts an acting force on the work subject, There has been a possibility that the above-mentioned overload or impact load may be directly transmitted to impair the function of the motor. In addition, if the power supply to the motor has been cut off, there has been a request to manually operate and return the working shaft by disconnecting the working shaft and the motor. No mechanism has been proposed so far that can suitably achieve such an operation. Furthermore, it is advantageous in terms of cost if an actuator having a compact device outer shape can be realized while having a safety device that can easily perform the above-described motor protection and return operation.

The present invention has been made in view of the above-described problems, and an object of the present invention is to provide an unconventional device capable of exerting an acting force with a single actuator on a plurality of different objects to be worked. It is to provide.

In addition, the present invention is equipped with a safety device that can easily carry out motor protection and return operation, but also has a compact device outer shape, and can easily operate the safety device even for a weak person such as an elderly person or a child. It is also an object to provide a possible actuator.

The actuator according to the present invention includes a housing attached to a base serving as an installation reference, a driving force generating means for generating a driving force, a working shaft projecting on one side and the other side of the housing, and the driving force generation Driving force transmitting means for transmitting the driving force generated by the means to the working shaft, and projecting to one end of the working shaft projecting to one side of the housing and projecting to the other side of the housing The other side shaft end of the working shaft is an actuator that reciprocates linearly in the same direction or in the opposite direction on the same axis by receiving the driving force, the one side shaft end and the other side shaft end The position of the housing relative to the base is allowed to allow a movement component of the accompanying movement that occurs in the housing when the portion exerts an acting force on separate objects. It is characterized in further comprising a moving means.

According to the present invention, it is possible to provide an unconventional device capable of exerting an acting force with a single actuator on a plurality of different objects to be actuated. In addition, the manufacturing cost can be reduced.

In addition, according to the present invention, while having a safety device that can easily carry out motor protection and return operation, the device has a compact device outer shape, and even a powerless person such as an elderly person or a child can operate the safety device. An actuator that can be easily performed can be provided. Therefore, according to the actuator of the present invention, it is possible to obtain an effect of reducing the weight of the apparatus and reducing the manufacturing cost, and to obtain high operability and safety.

FIG. 1 is a perspective view illustrating an external appearance of a front side of an actuator according to the present embodiment. FIG. 2 is a perspective view showing the appearance of the back side of the actuator according to the present embodiment. FIG. 3 is a front view of the actuator according to the present embodiment. FIG. 4 is a diagram showing a back view of the actuator according to the present embodiment. FIG. 5 is a diagram showing a top view of the actuator according to the present embodiment. FIG. 6 is a diagram showing a bottom view of the actuator according to the present embodiment. FIG. 7 is a diagram showing a cross section along AA in FIG. FIG. 8 is a view showing a BB cross section in FIG. FIG. 9 is an enlarged view of a portion C in FIG. FIG. 10 is a diagram showing a DD cross section in FIG. FIG. 11 is a diagram showing a cross section taken along line EE in FIG. FIG. 12 is a diagram illustrating a state in which a lever member, which is a safety device for the actuator according to the present embodiment, is operated, and particularly is a front view corresponding to FIG. FIG. 13 is a diagram illustrating a state in which a lever member that is a safety device for the actuator according to the present embodiment is actuated, and particularly is a bottom view corresponding to FIG. 6. FIG. 14 is a view showing a state in which a lever member, which is a safety device for an actuator according to the present embodiment, is operated. In particular, FIG. 14 is a cross-sectional view corresponding to FIG. 11 and showing a FF cross section in FIG. Yes. FIG. 15 is a diagram illustrating a case where the actuator according to the present embodiment is used in an opening / closing mechanism for a hermetic door, and particularly shows an installation state before operation. FIG. 16 is a diagram illustrating a case where the actuator according to the present embodiment is used for an opening / closing mechanism of a hermetic door, and particularly shows an installed state after operation. FIG. 17 is a diagram illustrating a case where the actuator according to the present embodiment is used for an opening / closing mechanism of a hermetic door, and particularly illustrates the state of the action shaft before and after the operation. FIG. 18 is a diagram showing an embodiment in which a shaft body having one side shaft end portion and a shaft body having the other side shaft end portion are configured separately from each other with respect to the working shaft according to the present invention. FIG. 19 is a diagram illustrating a state before an operation when the position moving means of the present invention is configured as a rotating shaft that performs a rotating motion in an arbitrary plane. FIG. 20 is a diagram illustrating a state after the operation when the position moving unit of the present invention is configured as a rotating shaft that performs a rotating motion in an arbitrary plane.

Hereinafter, preferred embodiments for carrying out the present invention will be described with reference to the drawings. The following embodiments do not limit the invention according to each claim, and all combinations of features described in the embodiments are not necessarily essential to the solution means of the invention. .

Here, FIG. 1 is a perspective view showing the appearance of the front side of the actuator according to the present embodiment, while FIG. 2 is a perspective view showing the appearance of the back side of the actuator according to the present embodiment. 3 is a front view of the actuator according to the present embodiment, FIG. 4 is a rear view of the actuator according to the present embodiment, FIG. 5 is a top view of the actuator according to the present embodiment, and FIG. FIG. 4 is a bottom view of the actuator according to the present embodiment. 7 is a cross-sectional view taken along line AA in FIG. 3, FIG. 8 is a cross-sectional view taken along line BB in FIG. 3, FIG. 9 is an enlarged view of a portion C in FIG. FIG. 11 shows a cross section taken along the line DD in FIG. 12 to 14 are views showing a state in which a lever member which is a safety device for the actuator according to the present embodiment is operated, FIG. 12 is a front view corresponding to FIG. 3, and FIG. 6 is a bottom view corresponding to FIG. 6, and FIG. 14 is a cross-sectional view corresponding to FIG. 11, showing a cross section taken along line FF in FIG. 13.

The actuator 10 according to the present embodiment includes a housing 11 formed in a substantially rectangular shape, and a motor 21 as a driving force generation unit that generates a rotational driving force by obtaining and driving electric power from an external power source (not illustrated). And a working shaft 31 protruding on each of one side (upper side of the paper surface in FIG. 1) and the other side (lower side of the paper surface in FIG. 1) of the housing 11.

The motor 21 is attached to the housing 11 with the motor shaft 22 facing vertically downward, as shown in detail in FIG. The motor shaft 22 is provided with a female conical clutch 23 as a female cone, and an opening is formed so that the inner diameter of the conical shape increases as it goes downward. A male conical clutch 24 as a male cone is inserted into the opening of the female conical clutch 23 in a connectable / separable state, and the female conical clutch 23 and the male conical clutch 24 are connected in a normal state. Has been made.

Further, the male side conical clutch 24 is formed with a clutch side gear 24a at an extended portion on the lower side. A first reduction gear 25 is engaged with the clutch side gear 24a, a second reduction gear 26 is engaged with the first reduction gear 25, and a nut side gear 27 is engaged with the second reduction gear 26. Yes. That is, in this embodiment, the rotational driving force generated by driving the motor 21 is decelerated by the clutch side gear 24 a, the first reduction gear 25, and the second reduction gear 26 and transmitted to the nut side gear 27. The speed reduction mechanism according to the present embodiment is configured by the plurality of gears.

Further, the rotational driving force transmitted to the nut side gear 27 is transmitted to a nut member 29 that is rotatably installed in the housing 11 via a bearing 28 while the nut side gear 27 is fixed. It becomes. The nut member 29 is a member that forms the rolling device according to the present embodiment by cooperating with the action shaft 31 that functions as a screw shaft. Since this rolling device is a generally known device as a ball screw device, a detailed description thereof is omitted, but the specific structure thereof is such that, for example, the nut member 29 has a spiral groove on the inner peripheral surface. The working shaft 31 has a spiral groove corresponding to the spiral groove of the nut member 29 with respect to the outer peripheral surface. A plurality of rolling elements (balls, rollers, etc.) are installed in a freely rollable state between the spiral passage formed by the spiral groove of the nut member 29 and the spiral groove of the action shaft 31. In addition, about a some rolling element, it may be comprised so that it can circulate infinitely between the nut member 29 and the action shaft 31 by the return channel | path etc. which were formed in the nut member 29, and within the fixed range. It may be configured to be able to roll.

Therefore, the nut member 29 and the action shaft 31 that form the rolling device according to the present embodiment obtain a rotational driving force transmitted to the nut-side gear 27 to rotate the nut member 29 when the nut member 29 rotates. Along with this, the action shaft 31 can reciprocate linearly in the axial direction.

The action shaft 31 is a member protruding on one side (upper side of the paper surface in FIG. 1) and the other side (lower side of the paper surface in FIG. 1) of the housing 11, and in the present embodiment, is configured as one shaft body. Has been. That is, the working shaft 31 according to the present embodiment includes one shaft end portion 31a of the working shaft 31 that protrudes to one side of the housing 11 (upper side in the drawing in FIG. 1) and the other side of the housing 11 (the drawing in FIG. 1). The other side shaft end portion 31b of the working shaft 31 protruding downward) is configured to reciprocate linearly in the same direction on the same axis by receiving the rotational driving force from the motor 21. Therefore, according to the actuator 10 according to the present embodiment, the one-side shaft end portion 31a and the other-side shaft end portion 31b can exert an acting force in the same direction with respect to different objects. ing.

By the way, the actuator 10 according to the present embodiment can be installed by attaching the housing 11 to a base (not shown) serving as an installation reference, but the one-side shaft end portion 31a and the other-side shaft end. When the portion 31b exerts an acting force on separate objects, a moving motion component is generated with respect to the housing 11 in accordance with the state of the object. Therefore, in order to smoothly apply the acting force to the outside, it is necessary to provide a mechanism for allowing such a moving motion component between the housing 11 and the base.

Therefore, in this embodiment, the linear guide 41 is installed on the back side of the housing 11 as a position moving means for moving the position of the housing 11 with respect to the base. Since the linear guide 41 is also a generally known device, a detailed description thereof is omitted. However, the moving block 41b is assembled to the track rail 41a via a plurality of rolling elements capable of infinite circulation, and the track rail 41a. The moving block 41b is configured to be capable of reciprocating linear movement along the longitudinal direction. In the present embodiment, the moving block 41b is connected to the housing 11, and the side of the track rail 41a is attached to a base (not shown). Therefore, in the actuator 10 according to the present embodiment, the operation shaft 31 is moved by driving the motor 21, and the one-side shaft end portion 31a and the other-side shaft end portion 31b are the same with respect to different objects to be operated. When the acting force in the direction is applied, the movement component of the accompanying movement generated between the base and the housing 11 at that time is permitted by the reciprocating linear motion in the same plane of the track rail 41a with respect to the moving block 41b. Has been. With such a configuration, the actuator 10 according to the present embodiment can realize smooth operation and reliable application of acting force to the object.

Now, the actuator 10 according to the present embodiment further includes a safety device so that it can be easily returned when a failure occurs. Such a safety device will be described by comparing FIGS. 3 and 12, FIGS. 6 and 13, and FIGS. 11 and 14.

As described above, in this embodiment, the female-side cone is coupled / separated between the motor shaft 22 of the motor 21 serving as the driving force generating means and the clutch-side gear 24a serving as the driving force transmitting means. A clutch mechanism comprising a clutch 23 and a male conical clutch 24 is provided. This clutch mechanism is always in the coupled state by the pressing force of the elastic body so that the driving force can be transferred. That is, a coil spring 51 is installed below the male conical clutch 24 between the inner wall surface of the housing 11 and this coil spring 51 always exerts an elastic force upward so that the male cone The clutch 24 is pushed upward to realize a coupled state of the female conical clutch 23 and the male conical clutch 24 (see, for example, the state of FIG. 11). Therefore, in this state, the rotational movement of the motor shaft 22 is transmitted from the female side conical clutch 23 to the male side conical clutch 24, so that the rotational driving force is reliably transmitted to the clutch side gear 24a serving as the driving force transmitting means. It is in a state to be transmitted.

On the other hand, the male conical clutch 24 is provided with a fixed pin 52 extending vertically downward, and the fixed pin 52 is further in accordance with the tilting operation of the lever member 53 installed on the bottom surface of the housing 11. The side cone clutch 24 can move downward. In addition, as shown in FIG. 12, the lever member 53 according to the present embodiment is configured as a fulcrum α whose one end side (the right side in the drawing) is tiltably connected to the housing 11, and a tension operation from the operator. The other end side (left side of the paper surface) that receives the power is configured as a force point β, and further, a portion that is connected to the fixing pin 52 that is connected to the male side conical clutch 24 (a position in the vicinity of the fulcrum α) is a member configured as an action point γ is there. Therefore, when the operator pulls the other end side (left side of the paper) of the lever member 53 as the force point β downward, the lever member 53 tilts about the one end side (right side of the paper) that is the fulcrum α, and the tilting is performed. The part (position near the fulcrum α) connected to the fixed pin 52 that is the action point γ moves downward by the amount of operation. Then, the male conical clutch 24 connected to the fixing pin 52 is similarly moved downward, so that the coupling state of the female conical clutch 23 and the male conical clutch 24 is released, and the clutch mechanism is separated. (See FIG. 14). Such a separated state of the clutch mechanism cuts off that the rotational driving force transmitted from the motor shaft 22 of the motor 21 is transmitted to the clutch side gear 24a which is a driving force transmitting means. In order to eliminate the problem that has occurred in the shaft 31 and the like, an operation such as manually moving the action shaft 31 to the return position is possible.

In addition, about the mechanism which implement | achieves the tilting operation | movement of the lever member 53 mentioned above, lever member 53, such as a string-like member installed in the position of the force point (beta) which is the other end side (left side of a paper surface) of lever member 53, is simplified. Any mechanism that can perform the pulling operation may be used, and it is preferable to select an appropriate mechanism according to the installation environment of the actuator 10.

Further, since the above-described tilting operation of the lever member 53 is performed against the elastic force of the coil spring 51, when the operator cancels the pulling operation to the other end side (left side of the paper), which is the force point β, The male conical clutch 24 moves upward by the action of the elastic force of the coil spring 51, and the coupling state between the female conical clutch 23 and the male conical clutch 24 is realized again. Further, since the clutch mechanism according to the present embodiment employs conical clutches such as the female conical clutch 23 and the male conical clutch 24, the phase difference of the clutch is taken into account, for example, during the return operation of the clutch mechanism described above. This is preferable because the return operation is reliably performed without any problems. Furthermore, even during the operation of separating the clutch, if it is a conical clutch, the clutch can be easily separated with a small force, so it is excellent in operability and safe operation, so it is also excellent in terms of safety. It can be said that it is a mechanism.

Furthermore, as shown in FIGS. 6 and 13, the lever member 53 of the present embodiment has a conduction hole 53a for conducting the action shaft 31, and the action shaft 31 is inserted into the conduction hole 53a. By conducting, the lever member 53 and the action shaft 31 are arranged to cross each other. As described above, the lever member 53 of the present embodiment is arranged at a position along the outer shape of the apparatus without protruding from the housing 11, so that the outer shape of the actuator 10 itself can be made very compact. Yes. Therefore, the actuator 10 according to the present embodiment can realize a reduction in manufacturing cost as well as a reduction in weight and size of the device.

Also, by arranging the lever member 53 as described above, the length of the lever member 53 can be increased to the same width as the actuator 10. Thereby, even a non-powerful person such as an elderly person or a child can easily operate the lever member 53, coupled with the reduction of the operation force based on the adoption of the

conical clutches

23 and 24 described above, The operability of the safety device is greatly enhanced.

The basic configuration of the actuator 10 according to the present embodiment has been described above with reference to FIGS. Next, a usage example of the actuator 10 according to the present embodiment will be described with reference to FIGS. Here, FIGS. 15 to 17 are diagrams illustrating the case where the actuator according to the present embodiment is used for the opening / closing mechanism of the hermetic door, in particular, FIG. 15 shows the installation state before the operation, and FIG. FIG. 17 illustrates the state of the action shaft before and after operation.

The use examples shown in FIGS. 15 to 17 illustrate the case where the actuator 10 according to the present embodiment is used as an opening / closing mechanism of a sealing door 81 that requires sealing performance such as a large refrigerator. The

pressing portions

82a and 82b arranged above and below 81 are pressed at the upper and lower ends (one side shaft end portion 31a and the other side shaft end portion 31b) of the actuator 10 according to the present embodiment. By inclining and pressing the

portions

85a and 85b, the sealing door 81 is pressed against the door frame 83 and fixed in a sealed state (see FIG. 16).

That is, when the actuator 10 according to the present embodiment is operated from the state shown in FIG. 15, in the actuator 10 according to the present embodiment, for example, as shown in FIG. The one side shaft end portion 31a and the other side shaft end portion 31b exert an acting force in the same direction on the

pressing portions

85a and 85b which are separate actuated bodies. , 85b each perform a tilting action, and act to press the sealed door 81 against the door frame 83. However, during such tilting operation of the

pressing portions

85 a and 85 b, a moving motion component is generated between the base (not shown) and the housing 11. This motion component is shown as a difference amount “S” in FIG. In order to allow this motion component “S”, in the actuator 10 according to the present embodiment, as shown in FIG. 16, the linear guide 41 installed on the back side of the housing 11 functions. That is, the reciprocating linear motion of the track rail 41a with respect to the moving block 41b in the same plane causes the housing 11 to move relative to the base (not shown), and the motion component “S” is allowed. With such a configuration, the actuator 10 according to the present embodiment can realize smooth operation and reliable application of acting force to the object.

The preferred embodiments of the present invention have been described above, but the technical scope of the present invention is not limited to the scope described in the above embodiments. Various modifications or improvements can be added to the embodiment.

For example, in this embodiment described above, the one-side shaft end portion 31a of the working shaft 31 projecting to one side of the housing 11 and the other-side shaft end portion 31b of the working shaft 31 projecting to the other side of the housing 11 are The structure which reciprocated linearly in the same direction on the same axis line by receiving the driving force from the motor 21 was adopted. That is, the action shaft 31 according to the present embodiment is configured as a single shaft body. However, the scope of the present invention is not limited to the embodiment described above. About the action shaft which concerns on this invention, the form by which the shaft body which has the one side axial end part 31a and the shaft body which has the other side axial end part 31b are comprised separately is employable. Specifically, as shown in FIG. 18, two sets of

nut members

91a, 91b and

action shafts

92a, 92b as rolling devices installed in the housing 11 are arranged so that each performs a separate operation. Can be configured. That is, in the embodiment shown in FIG. 18, one side shaft end portion 92 a ′ of the working shaft 92 a and the other side shaft end portion 92 b ′ of the working shaft 92 b receive the driving force from the motor 21 so that they are on the same axis line. An example configured to reciprocate linearly in the opposite direction is shown. In addition, since the working

shafts

92a and 92b of the rolling device illustrated in FIG. 18 are reversely threaded, the

nut members

91a and 91b are assumed to rotate in the same direction. Any combination of operations can be employed for the rotation directions of the

nut members

91a and 91b and the movement directions of the

action shafts

92a and 92b.

Further, for example, in the above-described embodiment, when the one-side shaft end portion 31a and the other-side shaft end portion 31b exert an acting force on different objects, the accompanying movement motion component generated in the housing 11 is reduced. In order to allow it, it is shown that a position moving means for moving the position of the housing 11 with respect to the base is provided, and the case where the linear guide 41 is employed as the position moving means has been exemplified. However, the position moving means of the present invention is not limited to the linear guide 41 that performs a reciprocating linear motion in an arbitrary plane. For example, as shown in FIGS. 19 and 20, the position moving means of the present invention can be configured as a rotating shaft 95 that performs rotational movement in an arbitrary plane.

In addition, although the Example illustrated by FIG.19 and FIG.20 is a figure which illustrates the case where the actuator of this invention functions as a closing device of the

doors

96a and 96b arrange | positioned diagonally centering on the actuator 10. FIG. When the actuator of the present invention is operated in the arrangement state illustrated in FIG. 19, an operating component of the accompanying movement in the rotation direction is generated in the housing 11 with the upward movement of the action shaft 31. In the case of such a configuration example, the rotation shaft 95 as shown in FIGS. 19 and 20 functions suitably, and it is possible to suitably allow the motion component of the accompanying movement generated in the housing 11. . As described above, in the actuator according to the present invention, it is desirable to select an optimum position moving means according to the shape or the like of the acted body acted by the action axis.

Further, for example, in the above-described embodiment, the driving force transmission means is constituted by four gears, that is, the clutch side gear 24a, the first reduction gear 25, the second reduction gear 26, and the nut side gear 27. However, the driving force transmission means according to the present invention is not limited to the above-described embodiment, and any form can be adopted.

Further, for example, in the above-described embodiment, it has been described that the rolling device formed by the nut member 29 and the action shaft 31 that is a screw shaft is configured as a rolling element screw device. It is also possible to employ a sliding screw device as the rolling device.

It is apparent from the scope of the claims that the embodiment added with such changes or improvements can also be included in the technical scope of the present invention.

10 actuator, 11 housing, 21 motor, 22 motor shaft, 23 female conical clutch, 24 male conical clutch, 24a clutch side gear, 25 first reduction gear, 26 second reduction gear, 27 nut side gear, 28 bearing, 29 nut member, 31 working shaft, 31a one side shaft end, 31b other side shaft end, 41 linear guide, 41a track rail, 41b moving block, 51 coil spring, 52 fixing pin, 53 lever member, 53a conduction hole, 85a, 85b pressing part, 91a, 91b nut member, 92a, 92b working shaft, 92a 'one side shaft end, 92b' other side shaft end, 95 rotating shaft, α fulcrum, β force point, γ working point.

Claims

A housing that is attached to a base that is an installation standard;
Driving force generating means for generating a driving force;
A working shaft projecting on each of one side and the other side of the housing;
Driving force transmitting means for transmitting the driving force generated by the driving force generating means to the action shaft;
Have
One side shaft end portion of the working shaft projecting to one side of the housing and the other side shaft end portion of the working shaft projecting to the other side of the housing are on the same axis line by receiving the driving force. In an actuator that reciprocates linearly in the same direction or in the opposite direction,
When the one-side shaft end portion and the other-side shaft end portion exert an acting force on separate objects, the above-mentioned base is moved with respect to the base in order to allow an operating component of the accompanying movement generated in the housing. An actuator comprising position moving means for moving the position of a housing.
The actuator according to claim 1, wherein
The position moving means causes the housing attached to the base to linearly move or rotate in an arbitrary plane.
The actuator according to claim 1 or 2,
The actuator is characterized in that the working shaft includes a shaft body projecting on one side of the housing and a shaft body projecting on the other side of the housing as separate bodies.
The actuator according to any one of claims 1 to 3,
The driving force transmission means is composed of a speed reduction mechanism composed of a plurality of gears, and a nut member capable of rotating by receiving the driving force from the speed reduction mechanism,
The action shaft is a screw shaft that can reciprocate linearly with the rotational movement of the nut member,
A rolling device is formed by the nut member and the screw shaft.
The actuator according to claim 1, wherein
The driving force generating means and the driving force transmitting means are connected via a clutch mechanism that can be coupled / separated,
The clutch mechanism is always in the coupled state by the pressing force of the elastic body and transfers the driving force. On the other hand, the clutch mechanism is in the separated state when receiving an external tensile force against the pressing force of the elastic body. An actuator characterized by cutting off transmission of driving force.
The actuator according to claim 5, wherein
The clutch mechanism is a conical clutch constituted by a female cone and a male cone,
The actuator according to claim 1, wherein the tensile force for separating the clutch mechanism is exerted by a lever member connected to either the female cone or the male cone.
The actuator according to claim 6, wherein
The lever member is
A fulcrum that is tiltably connected to the housing;
A force point to receive a pulling operation from the operator,
An action point connected to either the female cone or the male cone;
An actuator comprising:
The actuator according to claim 6 or 7,
The lever member has a conduction hole for conducting the working shaft,
The actuator is characterized in that the lever member and the action shaft are arranged so as to intersect each other because the action shaft is arranged to be conducted in the conduction hole.