JP7302842B2 - actuator - Google Patents

Description

TECHNICAL FIELD The present invention relates to an actuator, and more particularly to an actuator designed to change the mounting angle of a motor unit with respect to an actuator body.

For example, Patent Document 1 discloses a configuration of a slider type actuator.
Incidentally, Patent Document 1 is by the present patent applicant.
A slider-type actuator described in Patent Document 1 is composed of an actuator main body and a motor module unit. The actuator main body includes a housing, a moving body such as a rod or a slider housed in the housing, a ball nut to which the moving body is fixed, and the ball nut screwed together so as to be rotatable. ball screws, etc.
The motor module unit includes a motor cover, a motor housed in the motor cover to drive the ball screw, an encoder for detecting the number of revolutions of the motor, a controller for controlling the motor, and the like.

A fitting projection is provided on the front end side of the motor module unit, and a fitting recess is provided on the rear end side of the actuator main body. The fitting convex portion is provided with one seating surface, and the fitting concave portion is provided with one female screw portion. By fitting the fitting protrusion into the fitting recess, fixing screws are screwed from the outside of the actuator body, and the motor module unit is seated on the seating surface of the fitting protrusion. connected to

JP-A-2005-151758

According to the above conventional configuration, there are the following problems.
In the case of the slider-type actuator disclosed in Patent Document 1, since the upper surface of the motor module unit is higher than the upper surface of the slider, when the slider is moved to the end on the motor unit side, it is mounted on the slider. There is a problem that various devices or workpieces that are attached to the motor module unit interfere with each other.
In order to deal with this, it is conceivable to raise the height of the slider, but that would increase the size of the actuator.
It is also possible to rotate the motor module unit with respect to the actuator main body so that the fixing screw is seated on a portion of the fitting convex portion that is not the seating surface and connected. In some cases, the outer peripheral surface of the portion may be damaged, and smooth attachment and detachment of the fitting concave portion and the fitting convex portion will be impaired.

SUMMARY OF THE INVENTION The present invention has been made based on these points, and an object of the present invention is to provide an actuator in which the mounting angle of the motor unit can be changed with respect to the actuator main body.

In order to achieve the above object, an actuator according to claim 1 of the present invention provides an actuator main body, a motor unit detachably connected to the actuator main body, and a cross section provided in either one of the actuator main body and the motor unit. a fitting recess having an inner circumferential surface with a circular shape ; and a fitting recess provided in the other of the actuator main body and the motor unit and fitted into the fitting recess and having a circular cross-sectional shape. A fitting protrusion having an outer peripheral surface with a circular cross-sectional shape corresponding to the peripheral surface , a female thread provided in the fitting recess, and a circular cross-sectional shape of the fitting protrusion. A planar seating surface provided inside the outer peripheral surface , and a tip of the female thread portion is screwed into the female thread portion in a state in which the fitting convex portion is fitted in the fitting concave portion, and the tip thereof is seated on the seating surface. a fixing screw for connecting the actuator main body and the motor unit by means of at least one of the female thread portion and the seating surface, and at least one of the female thread portion and the seating surface. The other of the two is provided with a plurality of units, and is relatively rotated in a state where the fitting convex portion is fitted in the fitting concave portion, so that the motor unit is set in an arbitrary posture with respect to the actuator main body, In this state, the fixing screw is screwed into the female threaded portion and seated on the seating surface to connect the actuator main body and the motor unit.
According to claim 2, the actuator according to claim 1 is characterized in that, in the actuator according to claim 1, a fitting projection is provided on the actuator main body side and a fitting recess is provided on the motor unit side. be.
According to claim 3, the actuator according to claim 1 is characterized in that, in the actuator according to claim 1, a fitting concave portion is provided on the actuator main body side and a fitting convex portion is provided on the motor unit side. be.
According to claim 4, the actuator according to claim 2 or claim 3 is characterized in that the seating surfaces are provided at four locations at intervals of 90° along the circumferential direction.
Further, the actuator according to claim 5 is the actuator according to claim 2 or claim 3, wherein the female threaded portion is provided at four positions every 90° along the circumferential direction.

As described above, according to the actuator according to claim 1 of the present invention, the actuator main body, the motor unit detachably connected to the actuator main body, and the motor unit provided in either the actuator main body or the motor unit a fitting recess, a fitting protrusion provided on the other of the actuator main body and the motor unit and fitted into the fitting recess, a female thread provided in the fitting recess, and the fitting protrusion The actuator body and the actuator body are screwed into the female screw portion in a state in which the fitting convex portion is fitted in the fitting concave portion, and the tip thereof is seated on the seating surface. and a fixing screw for connecting the motor unit, and rotating the motor unit in an arbitrary position with respect to the actuator main body by relatively rotating the fitting projection in a state where the fitting projection is fitted in the fitting recess. In this state, the fixing screw is screwed into the female threaded portion and seated on the seating surface to connect the actuator main body and the motor unit. The mounting angle of can be changed.
According to the actuator according to claim 2, in the actuator according to claim 1, the actuator main body side is provided with a fitting convex portion, and the motor unit side is provided with a fitting concave portion. In contrast, the mounting angle of the motor unit can be changed.
According to the actuator according to claim 3, in the actuator according to claim 1, the actuator main body side is provided with a fitting concave portion, and the motor unit side is provided with a fitting convex portion. In contrast, the mounting angle of the motor unit can be changed.
According to an actuator according to claim 4, in the actuator according to claim 2 or 3, the fitting protrusion is provided with a plurality of seating surfaces, and any one of the plurality of seating surfaces is provided with a seat surface. Since the fixing screw is screwed with the position of the female thread aligned, it is possible to change the mounting angle of the motor unit with respect to the actuator main body.
According to the actuator according to claim 5, in the actuator according to claim 4, the fitting concave portion is provided with one female screw portion. Mounting angle can be changed.
Further, according to the actuator according to claim 6, in the actuator according to claim 4 or 5, the seating surface is provided at four locations at every 90° along the circumferential direction. The mounting angle of the motor unit can be changed in four directions.
According to the actuator of claim 7, in the actuator of claim 2 or 3, the fitting recess is provided with a plurality of female threaded portions, and one of the plurality of female threaded portions is provided with the above-mentioned threaded portion. Since the fixing screw is screwed in accordance with the position of the seating surface, it is possible to change the mounting angle of the motor unit with respect to the actuator main body.
According to the actuator according to claim 8, in the actuator according to claim 7, the fitting convex portion is provided with one seating surface. The mounting angle of can be changed.
Further, according to the actuator according to claim 9, in the actuator according to claim 7 or 8, the female screw portion is provided at four positions at every 90° along the circumferential direction, so that the actuator main body has the above-described The mounting angle of the motor unit can be changed in four directions.

FIG. 10 is a diagram showing the first embodiment of the present invention, and is a perspective view of the actuator in a state in which the motor unit is placed vertically. FIG. 2 is a diagram showing the first embodiment of the present invention, and is a cross-sectional view taken along the line II-II of FIG. 1. FIG. FIG. 10 is a diagram showing the first embodiment of the present invention, and is an exploded perspective view of the actuator in a state in which the motor unit is placed vertically, as seen from the rear side. FIG. 4 is a diagram showing the first embodiment of the present invention, and is an exploded perspective view of the actuator in a state in which the motor unit is placed vertically, as viewed from the front side. FIG. 3 is a view showing the first embodiment of the present invention, and is a cross-sectional view taken along the line VV in FIG. 2. FIG. FIG. 10 is a diagram showing the first embodiment of the present invention, and is a perspective view of the actuator in a state in which the motor unit is rotated sideways. FIG. 10 is a diagram showing the first embodiment of the present invention, and is an exploded perspective view of the actuator in a state where the motor unit is rotated sideways as viewed from the front side. FIG. 7 is a view showing the first embodiment of the present invention, and is a cross-sectional view taken along the line VIII-VIII in FIG. 6. FIG. FIG. 10 is a diagram showing a second embodiment of the present invention, and is a perspective view of an actuator in a state in which the motor unit is placed vertically. FIG. 11 is a diagram showing a second embodiment of the present invention, and is an exploded perspective view of the actuator in a state in which the motor unit is placed vertically, as seen from the rear side. FIG. 10 is a diagram showing a second embodiment of the present invention, and is an exploded perspective view of the actuator in a state in which the motor unit is placed vertically, as viewed from the front side. FIG. 9 is a cross-sectional view taken along the line XII-XII in FIG. 9, showing the second embodiment of the present invention. FIG. 10 is a diagram showing the second embodiment of the present invention, and is a perspective view of the actuator in a state in which the motor unit is rotated sideways. FIG. 11 is a diagram showing a second embodiment of the present invention, and is an exploded perspective view of the actuator in a state in which the motor unit is rotated sideways as viewed from the rear side. FIG. 10 is a diagram showing a second embodiment of the present invention, and is an exploded perspective view of the actuator in a state in which the motor unit is rotated sideways, as seen from the front side. FIG. 14 is a diagram showing a second embodiment of the present invention, and is a cross-sectional view taken along the line XVI-XVI of FIG. 13. FIG. FIG. 11 is a diagram showing a third embodiment of the present invention, and is a perspective view of an actuator in a state in which the motor unit is placed vertically. FIG. 11 is a diagram showing a third embodiment of the present invention, and is an exploded perspective view of the actuator in a state in which the motor unit is placed vertically, as seen from the rear side. FIG. 13 is a diagram showing a third embodiment of the present invention, and is an exploded perspective view of the actuator in a state in which the motor unit is placed vertically, as viewed from the front side. FIG. 12 is a diagram showing a third embodiment of the present invention, and is a perspective view of the actuator in a state in which the motor unit is rotated sideways, as seen from the rear side. FIG. 10 is an exploded perspective view of the actuator in a state in which the motor unit is rotated sideways, as seen from the rear side, showing the third embodiment of the present invention. FIG. 13 is a diagram showing a third embodiment of the present invention, and is an exploded perspective view of the actuator in a state where the motor unit is rotated sideways as viewed from the front side.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 8. FIG.
The actuator 1 according to the first embodiment comprises, for example, an actuator main body 3 and a motor unit 5 as shown in FIGS. 1 and 2. As shown in FIGS.

The actuator body 3 has a base 7 . The base 7 has a substantially U-shaped cross section, and an opening 9 is provided on the upper side in FIG. As shown in FIG. 2, guide rails 11, 11 (the guide rail 11 on the front side in FIG. 2 is not shown) are embedded on both inner side surfaces of the base 7 on the opening 9 side. A guide recess 13 is formed in the guide rail 11 .
The front end side (left side in FIG. 2) of the base 7 is closed by a front end cap 15 .

The actuator body 3 has a slider 21 . The slider 21 is movably installed within the base 7 . The slider 21 has a slider body 23 . The slider body 23 is formed with a through hole 25 extending in the front-rear direction (horizontal direction in FIG. 2). The rear end side (the right side in FIG. 2) of the through hole 25 is enlarged in diameter to form a ball screw nut accommodating portion 27 .

Guide recesses (not shown) are formed on both sides of the slider body 23 in the width direction (perpendicular to the plane of FIG. 2). Further, a no-load guide circuit (not shown) is formed inside the slider body 23 . Further, the slider 21 has guide end caps 29 , 29 , 31 , 31 . The guide end caps 29, 29 are installed on both sides of the front end face (left side in FIG. 2) of the slider body 23 in the width direction (perpendicular to the paper surface in FIG. 2). The end cap 29 is not shown), and the guide end caps 31, 31 are installed on both sides of the rear end surface (right side surface in FIG. 2) of the slider body 23 in the width direction (perpendicular to the paper surface in FIG. 2). (The guide end cap 31 on the front side in FIG. 2 is not shown). A return path (not shown) is formed in the guide end caps 29 and 31 .

A space between the guide recess 13 of the guide rail 11 and the guide recess (not shown) of the slider body 23, the guide unloaded circulation path (not shown), and the return path (not shown) of the guide end caps 29 and 31. Inside, a plurality of steel balls (not shown) roll and circulate.

A slider cover 33 is installed on the slider 21 . The slider cover 33 is installed on the upper side of the slider body 23 in FIG. A stainless steel sheet sliding member 35 is installed on the slider 21 . The stainless steel sheet sliding member 35 is fixed to the upper surface of the slider main body 23 in FIG. 2 and arranged on the lower side of the slider cover 33 in FIG. There is a gap between the slider cover 33 and the stainless steel sheet sliding member 35, and this gap serves as a space 37 for the stainless steel sheet.

A ball screw nut 41 is installed in the ball screw nut accommodating portion 27 of the slider body 23 . This ball screw nut 41 has a ball screw nut body 43 . The ball screw nut body 43 is formed with a female screw portion 45 extending in the front-rear direction (horizontal direction in FIG. 2). Further, no-load circulation paths 47, 47 are formed in the ball screw nut 41 as shown in FIG.

Also, the ball screw nut 41 has end caps 49 and 51 . The end cap 49 is installed at the front end (the left end in FIG. 2) of the ball screw nut body 35, and a return path 53 is formed. The end cap 51 is installed at the rear end (the right end in FIG. 2) of the ball screw nut body 35, and a return path 55 is formed.

The actuator main body 3 has a bearing case 61 . The bearing case 61 is installed on the rear end side (right side in FIG. 2) of the base 7, and bearings 63, 63 are installed therein.
As shown in FIG. 3, a body-side fitting convex portion 65 is formed on the rear end side surface of the bearing case 61 (lower right side surface in FIG. 3). Four seating surfaces 67a, 67b, 67c, and 67d are formed on the outer peripheral surface of the body-side fitting convex portion 65 at intervals of 90 degrees.

Further, the actuator main body 3 has a ball screw shaft 71 . The ball screw shaft 71 is accommodated and arranged in the base 7 and is rotatably supported by the bearings 63 , 63 . A male screw portion 73, which is a helical groove, is formed on the outer peripheral surface of the ball screw shaft 71. As shown in FIG.

The ball screw nut 41 is screwed onto the ball screw shaft 71 . That is, a plurality of steel balls 75 roll and circulate in the space between the male screw portion 73 and the female screw portion 45, the no-load circulation paths 47, 47, the return path 53, and the return path 55. ing.
When the ball screw shaft 71 rotates, the rotation of the slider 21 is restricted by a steel ball (not shown) in the space between the guide recess 13 of the guide rail 11 and the guide recess (not shown) of the slider body 23. The slider 21 is adapted to be moved in the front-rear direction (horizontal direction in FIG. 2).

Further, for example, as shown in FIGS. 1 and 2, a stainless steel sheet 81 is installed so as to close the opening 9 of the base 7 . The stainless sheet 81 passes through the stainless sheet space 37 between the slider cover 33 and the stainless sheet sliding member 35, as shown in FIG. As a result, the slider 21 can be moved while the opening 9 is closed by the stainless steel sheet 81 .
A sheet pressing member engaging recess 83 is formed in the front end cap 15 , and a sheet pressing member 85 is engaged with the sheet pressing member engaging recess 83 . As shown in FIG. 2, the front end side (left side in FIG. 2) of the stainless steel sheet 81 is inserted and fixed between the upper end side (upper side in FIG. 2) of the sheet pressing member 85 and the front end cap 15 . .
Further, for example, as shown in FIGS. 2 and 3, a sheet pressing member 89 is fixed to the bearing case 61 by fixing screws 87, 87. The rear end side (right side in FIG. 2) of the stainless steel sheet 81 is inserted and fixed.

The motor unit 5 has a motor case 91 . The motor case 91 includes a motor case main body 93 with both ends opened, a motor case front end cap 95 closing the front end side (left side in FIG. 2) of the motor case main body 93, and a rear end of the motor case main body 93. and a motor case rear end cap 97 that closes the side (right side in FIG. 2).

A motor 101 for rotationally driving the ball screw shaft 71 is housed in the motor case main body 93 . An encoder 103 for detecting the number of revolutions of the motor 101 is installed on the rear end side of the motor 101 (on the right side in FIG. 2). Further, the motor case main body 93 has a shape extending upward in FIG. ing.
Further, a communication substrate 107 for communicating with a controller (not shown) or the like is installed inside the motor case rear end cap 97 .

An Oldham coupling mechanism 111 is provided inside the motor case front end cap 95 . The Oldham coupling mechanism 111 includes a motor side hub 115 fixed to the output shaft 113 of the motor 101 and a ball screw shaft side hub 117 fixed to the rear end side (right side in FIG. 2) of the ball screw shaft 71. and a coupling slider 119 slidably inserted between the motor side hub 115 and the ball screw shaft side hub 117 .

As shown in FIGS. 2 and 4, the motor case front end cap 95 is formed with a motor unit side fitting recess 121 that opens on the front end face side (left side in FIG. 2). A female screw portion 123 is formed on the upper side of the motor unit side fitting recess 121 .

The actuator main body 3 and the motor unit 5 are connected by inserting the main body-side fitting protrusion 65 into the motor-unit-side fitting recess 121 and inserting and screwing a fixing screw 125 into the female screw part 123. 5, the fixing screw 125 is brought into contact with the seating surface 67a so as to be connected and fixed.

The motor unit 5 is, for example, connected and fixed to the actuator main body 3 in a vertically placed state as shown in FIG.
2, the motor unit 5 can be rotated and moved horizontally as shown in FIGS. It is connected and fixed to the actuator main body 3 in the placed state. At this time, as shown in FIG. 8, the tip side of the fixing screw 125 is brought into contact with the seating surface 67b.
Further, since the tip of the fixing screw 125 can be brought into contact with the seating surface 67c or the seating surface 67d, the motor unit 5 can be installed in a state rotated 180° from the state shown in FIG. In some cases, it may be installed in a state rotated by 180° from the state shown in FIG.

Next, the operation of this first embodiment will be described.
First, the basic operation of the actuator 1 will be explained.
When the ball screw shaft 71 is rotated and driven by the motor 101, the rotation of the slider 21 is restricted by a steel ball (not shown) in the space between the guide recess 13 of the guide rail 11 and the guide recess (not shown) of the slider body 23. , the slider 21 is moved in the longitudinal direction (horizontal direction in FIG. 2).

Next, the connection of the motor unit 5 to the actuator main body 3 will be described.
The motor unit 5 and the actuator main body 3 are connected by inserting the main body side fitting projection 65 into the motor unit side fitting recess 121 and inserting and screwing a fixing screw 125 into the female threaded portion 123. 5, the tip of the fixing screw 125 is brought into contact with one of the seating surfaces 67a, 67b, 67c, and 67d to connect and fix. That is, the motor unit 5 is fixed to the actuator main body 3 while being rotated in four directions at intervals of 90 degrees, and the motor unit 5 as shown in FIGS. In addition to the state in which the motor unit 5 is placed horizontally as shown in FIGS. 6 to 8, the state in which the motor unit 5 is placed vertically as shown in FIGS. A state in which the motor unit 5 is rotated by 180° or a state in which the motor unit 5 is rotated by 180° from a state in which the motor unit 5 is placed horizontally as shown in FIGS.

Next, the effects of this first embodiment will be described.
First, the mounting angle of the motor unit 5 with respect to the actuator main body 3 can be changed. That is, the body-side fitting convex portion 65 is provided with seating surfaces 67a, 67b, 67c, and 67d. By bringing the motor unit 5 into contact with any one of the seating surfaces 67a, 67b, 67c, and 67d, the mounting angle of the motor unit 5 with respect to the actuator main body 3 can be changed in four directions.
At this time, since four seating surfaces 67a, 67b, 67c, and 67d are provided, the fixing screw 125 is attached to the outer peripheral surface of the body-side fitting protrusion 65, which is not provided with a seating surface, as in the conventional art. It is no longer necessary to forcibly seat the wire ends, thereby preventing damage to the outer peripheral surface of the body-side fitting convex portion 65 .
As a result, smooth fitting between the body-side fitting protrusion 65 and the motor-side fitting recess 121 is ensured.
Further, by rotating the motor unit 5 by 90 degrees and turning it sideways as shown in FIG. Alternatively, the workpiece and the motor unit 5 do not interfere with each other.

Next, a second embodiment of the present invention will be described with reference to FIGS. 9 to 16. FIG.
The actuator 201 according to the second embodiment has substantially the same configuration as the actuator 1 according to the first embodiment, but is composed of an actuator main body 203 and a motor unit 205. The actuator main body 203 has There is a bearing case 207 and the motor unit 205 has a motor case front end cap 209 . The bearing case 207 is provided with a body-side fitting concave portion 211 , and the motor-case front end cap 209 is provided with a motor-unit-side fitting convex portion 213 . Female threaded portions 215a, 215b, 215c, and 215d are formed at four 90-degree intervals in the body-side fitting concave portion 211, and a seating surface is provided at one place on the outer peripheral surface of the motor unit-side fitting convex portion 213. 217 are formed.

For example, in a state in which the motor unit 205 is placed vertically as shown in FIGS. is adapted to abut on the
Further, for example, when the motor unit 205 is placed horizontally as shown in FIGS. It is adapted to abut on surface 217 .

Therefore, in the case of the second embodiment as well, the seating surface 217 prevents damage to the motor unit side fitting protrusion 213, and the motor unit 205 can be positioned in four directions at intervals of 90 degrees with respect to the actuator main body 203. It can be fixed while rotating. That is, in addition to the state in which the motor unit 205 is placed vertically as shown in FIGS. 9 to 12 and the state in which the motor unit 205 is placed horizontally as shown in FIGS. 9 to 12, the motor unit 205 is rotated 180° from the vertically placed state, and the motor unit 205 is rotated by 180° as shown in FIGS. 13 to 16. The motor unit 205 can be rotated 180° from the horizontal position.

Next, a third embodiment of the present invention will be described with reference to FIGS. 17 to 22. FIG.
The actuator 301 according to the third embodiment has substantially the same configuration as the actuator 1 according to the first embodiment, but is composed of an actuator main body 303 and a motor unit 305. The actuator main body 303 has There is a bearing case 307 and the motor unit 305 has a motor case front end cap 309 . The bearing case 307 is provided with a body-side fitting concave portion 311 , and the motor-case front end cap 309 is provided with a motor-unit-side fitting convex portion 313 . A female threaded portion 315 is formed at one place in the body-side fitting concave portion 311, and four seating surfaces 317a, 317b, 317c are formed at intervals of 90 degrees on the outer peripheral surface of the motor-unit-side fitting convex portion 213. 317d are formed.

For example, when the motor unit 305 is placed vertically as shown in FIGS. 17 to 19, the fixing screw 125 is screwed into the female threaded portion 315 so that the tip of the fixing screw 315 contacts the seating surface 317a. It is designed to abut.
Further, for example, when the motor unit 305 is placed horizontally as shown in FIGS. It is adapted to be brought into contact with the surface 317b.

Therefore, in the case of the third embodiment as well, the seating surfaces 317a, 317b, 317c, and 317d prevent damage to the motor unit-side fitting convex portion 313, and the motor unit 305 is positioned 90 degrees relative to the actuator main body 303. It can be fixed while being rotated in four directions for each degree. That is, in addition to the state in which the motor unit 305 is placed vertically as shown in FIGS. 17 to 19 and the state in which the motor unit 305 is placed horizontally as shown in FIGS. 17 to 19, the motor unit 305 is rotated 180° from the vertically placed state, and the motor unit 305 is rotated by 180° as shown in FIGS. 20 to 21. The motor unit 305 can be rotated 180° from the horizontal position.

It should be noted that the present invention is not limited to the first to third embodiments.
Various cases are conceivable for the seating surface of the body-side fitting protrusion or the motor unit-side fitting protrusion, and the number of female threads of the body-side fitting recess or the motor unit-side fitting recess.
For example, it is conceivable that a plurality of both are provided.
Moreover, various cases are conceivable for the angle at which the motor unit is attached to the actuator main body.
In addition, the illustrated configuration is an example, and various cases are conceivable.

TECHNICAL FIELD The present invention relates to an actuator, and more particularly to an actuator in which the mounting angle of a motor unit can be changed with respect to an actuator body, and is suitable for actuators used in factory equipment, for example.

1 Actuator 3 Actuator Main Body 5 Motor Unit 65 Main Body Side Fitting Convex Part 67a Seating Surface 67b Seating Surface 67c Seating Surface 67d Seating Surface 121 Motor Unit Side Fitting Concave Part 123 Female Screw Part 125 Fixing Screw 201 Actuator 203 Actuator Body 205 Motor Unit 211 Main body side fitting concave portion 213 Motor unit side fitting convex portion 215a Female screw portion 215b Female screw portion 215c Female screw portion 215d Female screw portion 217 Seating surface 301 Actuator 303 Actuator body 305 Motor unit 311 Main body side fitting concave portion 313 Motor unit side fitting convex portion 315 female screw portion 317a seating surface 317b seating surface 317c seating surface 317d seating surface portion

Claims (5)

an actuator body;
a motor unit detachably connected to the actuator body;
a fitting recess provided in one of the actuator main body and the motor unit and having an inner peripheral surface having a circular cross-sectional shape ;
An outer peripheral surface having a circular cross-sectional shape corresponding to an inner peripheral surface having a circular cross-sectional shape of the fitting recess provided on the other of the actuator main body and the motor unit and fitted in the fitting recess. a fitting protrusion having a
a female thread provided in the fitting recess;
a planar seating surface provided inside the outer peripheral surface of the fitting protrusion having a circular cross-sectional shape ;
A fixing screw for connecting the actuator main body and the motor unit by being screwed into the female screw portion in a state where the fitting convex portion is fitted in the fitting concave portion and the tip thereof is seated on the seating surface. ,
and
At least one of the female threaded portion and the seating surface is provided, and the other of the female threaded portion and the seating surface is provided with a plurality of pieces,
The motor unit is rotated relative to the actuator main body with the fitting convex portion fitted in the fitting concave portion to take an arbitrary posture, and in this state, the fixing screw is inserted into the female thread portion. An actuator, wherein the actuator main body and the motor unit are connected by screwing them together and seating them on the seating surface. The actuator of claim 1, wherein
An actuator, wherein a fitting projection is provided on the actuator main body side, and a fitting recess is provided on the motor unit side. The actuator of claim 1, wherein
An actuator, wherein a fitting concave portion is provided on the actuator main body side, and a fitting convex portion is provided on the motor unit side. In the actuator according to claim 2 or 3,
The actuator is characterized in that the seating surfaces are provided at four locations at intervals of 90° along the circumferential direction. In the actuator according to claim 2 or 3,
The actuator, wherein the female threaded portion is provided at four locations at intervals of 90° along the circumferential direction.

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