JP7675428B2 - Actuator - Google Patents

Description

The present invention relates to an actuator, and in particular to an actuator that has a folded structure in which the actuator body and the motor case are arranged overlapping each other, thereby saving space and allowing for easy attachment and detachment.

The fluid pressure actuator described in Patent Document 1 has a piston that is reciprocally mounted in a cylinder chamber provided in the actuator body. A piston rod that protrudes forward of the actuator body is fixed to the piston. The cylinder chamber is divided by the piston into a retreat fluid pressure chamber and an advance fluid pressure chamber, and by supplying fluid to the retreat fluid pressure chamber and the advance fluid pressure chamber, the piston, and therefore the piston rod, is moved forward or backward.

The electric actuator described in Patent Document 2, like the fluid pressure actuator described in Patent Document 1, moves a moving body forward or backward, but a feed screw mechanism is provided to move the moving body forward or backward, and a motor is installed to rotate and drive the screw member of the feed screw mechanism.

JP 2001-74005 A Japanese Patent Application Publication No. 11-325213

However, the above conventional configuration has the following problems.
If one were to attempt to replace a fluid pressure actuator such as that described in Patent Document 1 with an electric actuator such as that described in Patent Document 2, a folded structure would have to be adopted in which the motor is positioned overlapping the actuator body so as to fit into the same installation space.
However, in this case, there is a concern that the motor or the motor case that houses the motor may block holes through which bolts or the like for fixing the electric actuator to the installation location are passed, making it difficult to attach and detach the electric actuator.

The present invention was made based on these points, and its purpose is to provide an actuator that can be easily attached and detached while saving space by using a folded structure in which the actuator body and the motor case are arranged overlapping each other.

In order to solve the above problem, the actuator according to claim 1 of the present invention comprises an actuator body having an attachment through hole through which a bolt to be screwed into an attachment location is inserted , and a motor case, and is characterized in that the actuator body and the motor case are arranged overlapping each other by a folded structure, and the attachment through hole is shielded by the motor case.
According to a second aspect of the present invention, there is provided an actuator according to the first aspect, characterized in that the mounting through-hole is exposed by removing a part of the motor case from an installation location.
Furthermore, the actuator according to claim 3 is the actuator according to claim 2, characterized in that at least a portion of the motor case facing the actuator body and the side surface are removed to expose the mounting through hole.
Furthermore, an actuator according to claim 4 is the actuator according to claim 2 or 3, characterized in that a part of the motor case is separated and removed to expose the mounting through hole.
Furthermore, an actuator according to claim 5 is the actuator according to claim 2 or 3, characterized in that a part of the motor case is rotated and removed to expose the mounting through hole.
Furthermore, an actuator according to claim 6 is the actuator according to claim 2 or 3, characterized in that a part of the motor case is slid and removed to expose the mounting through hole.
An actuator according to claim 7 is an actuator according to any one of claims 1 to 6, characterized in that there is a ball screw shaft installed in the center of the actuator body and rotated and driven by a motor installed in the motor case, there is a ball screw nut screwed onto the ball screw shaft, there are guide rods installed on both sides of the ball screw shaft in a direction perpendicular to the axial direction of the ball screw shaft and which move forward and backward in conjunction with the ball screw nut, and the mounting through hole is provided between the ball screw shaft and the guide rod.

As described above, the actuator of the present invention according to claim 1 comprises an actuator body having an attachment through hole and a motor case, and the actuator body and the motor case are arranged overlapping each other by a folded-back structure, and the attachment through hole is covered by the motor case, so that the folded-back structure saves space and allows for easy attachment and detachment.
Furthermore, according to the actuator of claim 2, in the actuator of claim 1, the mounting through-hole is exposed by removing a portion of the motor case from the installation location, so that by exposing the mounting through-hole with a simple structure, attachment and detachment can be made easier.
Furthermore, according to the actuator of claim 3, in the actuator of claim 2, the mounting through hole is exposed by removing at least a portion of the motor case facing the actuator main body and the side surface, so that the mounting through hole can be exposed with a simple configuration.
Furthermore, according to the actuator of claim 4, in the actuator of claim 2 or claim 3, a part of the motor case is separated and removed to expose the mounting through hole, so that the mounting through hole can be exposed with a simple configuration.
Furthermore, according to the actuator of claim 5, in the actuator of claim 2 or claim 3, a part of the motor case is rotated and removed to expose the mounting through hole, so that the mounting through hole can be exposed with a simple configuration.
Furthermore, according to the actuator of claim 6, in the actuator of claim 2 or claim 3, a part of the motor case is slid and removed to expose the mounting through hole, so that the mounting through hole can be exposed with a simple configuration.
According to the actuator of claim 7, in the actuator of any one of claims 1 to 6, there is a ball screw shaft installed in the center of the actuator body and rotated and driven by a motor installed in the motor case, there is a ball screw nut screwed onto the ball screw shaft, and there are guide rods installed on both sides of the ball screw shaft in a direction perpendicular to the axial direction of the ball screw shaft and the ball screw shaft and moved forward and backward in conjunction with the ball screw nut, and the mounting through hole is provided between the ball screw shaft and the guide rod, so that further space saving can be achieved and the mounting through hole can be exposed by a simple configuration.

FIG. 1 is a diagram showing the first embodiment of the present invention, and is a side view showing a state in which an actuator is used. 2A is a perspective view showing a state in which the mounting through-hole is covered by the motor case of the actuator, and FIG. 2B is a perspective view showing a state in which a part of the motor case of the actuator has been removed to expose the mounting through-hole. 3A is a side view showing a state in which the mounting through-hole is covered by a motor case of an actuator, and FIG. 3B is a front view showing a state in which the mounting through-hole is covered by a motor case of an actuator, according to a first embodiment of the present invention. FIG. 4 is a cross-sectional view taken along line IV-IV of FIG. 3(b) showing the first embodiment of the present invention. FIG. 3B is a cross-sectional view taken along line VV of FIG. 3B, showing the first embodiment of the present invention. 6A is a cross-sectional view taken along line VIa-VIa of FIG. 3A, and FIG. 6B is a cross-sectional view showing a state in which a part of the motor case of the actuator has been removed from the state shown in FIG. 6A to expose the mounting through-hole. 7A and 7B are diagrams showing a second embodiment of the present invention, in which FIG. 7A is a perspective view showing a state in which the mounting through-hole is covered by the motor case of the actuator, and FIG. 7B is a perspective view showing a state in which a part of the motor case of the actuator has been removed to expose the mounting through-hole. FIG. 11 is an exploded perspective view of a motor case according to a second embodiment of the present invention. 9A and 9B are diagrams showing a third embodiment of the present invention, in which FIG. 9A is a perspective view showing a state in which the mounting through-hole is covered by the motor case of the actuator, and FIG. 9B is a perspective view showing a state in which a part of the motor case of the actuator has been removed to expose the mounting through-hole. 10A is a cross-sectional view showing a state in which the mounting through-hole is covered by the motor case of the actuator, and FIG. 10B is a cross-sectional view showing a state in which a part of the motor case of the actuator has been removed to expose the mounting through-hole. 11A is a perspective view showing a state in which the mounting through-hole is covered by the motor case of the actuator, and FIG. 11B is a perspective view showing a state in which a part of the motor case of the actuator has been removed to expose the mounting through-hole. 12A is a cross-sectional view showing a state in which the mounting through-hole is covered by the motor case of the actuator, and FIG. 12B is a cross-sectional view showing a state in which a part of the motor case of the actuator has been removed to expose the mounting through-hole. FIG. 13 is an enlarged view of a portion XIII in FIG. 12( a ) showing a fourth embodiment of the present invention. FIG. 14 is an enlarged view of a portion XIV in FIG. 12(b) showing a fourth embodiment of the present invention.

A first embodiment of the present invention will be described below with reference to FIGS. 1 to 6. FIG.
As shown in Fig. 1, the actuator 1 of the first embodiment is installed, for example, below a conveyor 2. The conveyor 2 conveys an object 4, and the actuator 1 causes a stopper 6 to appear outside the conveyor 2, thereby restricting the movement of the object 4.
2 and 3, the actuator 1 includes an actuator body 3, a transmission mechanism case 5 connected to the rear (right side in FIG. 3) of the actuator body 3, and a motor case 7 connected to the transmission mechanism case 5 and disposed on the upper side in FIG. 3 so as to overlap with the actuator body 3. In this way, the actuator 1 has a folded structure in which the tip side of the motor case 7 is folded back to the tip side of the actuator body 3.

For example, as shown in Figures 4 and 5, a ball screw shaft housing 9 is formed in the central axial direction (left-right direction in Figure 4) of the actuator body 3. A connecting protrusion 11 is provided on the lower side of the transmission mechanism case 5 in Figure 5, and the connecting protrusion 11 engages with the right side of the ball screw shaft housing 9 in Figure 4.

A ball screw shaft 15 is rotatably installed in the ball screw shaft housing portion 9. As shown in FIG. 4, the base end side (the right side in FIG. 4) of the ball screw shaft 15 is rotatably supported by the transmission mechanism case 5 via a bearing 17.

As shown in FIG. 4, a ball screw nut 19 is screwed onto the ball screw shaft 15. A rod 21 is fixed to the ball screw nut 19. The rod 21 extends to the tip side (left side in FIG. 4) of the actuator body 3, and a moving body 25 is connected to the tip side of the rod 21 via an adapter 23. The stopper 6 is attached to the moving body 25, for example, as shown in FIG. 1.

Guide rod housings 27, 27 are formed on both sides of the actuator body 3 in the width direction (vertical direction in FIG. 4). Guide rods 29, 29 are slidably installed within the guide rod housings 27, 27. The left ends of the guide rods 29, 29 in FIG. 4 are connected to both ends of the moving body 25 in the width direction (vertical direction in FIG. 4). With this configuration, even if the ball screw shaft 15 is rotated, the ball screw nut 19, rod 21, and moving body 25 do not rotate, and are moved forward and backward in the left and right directions in FIG. 4 together with the guide rods 29, 29.

For example, as shown in Figs. 2 and 5, the motor 31 is fixed to the upper side of the transmission mechanism case 5 in Fig. 5. The motor 31 is disposed on the upper side of the actuator body 3 in Fig. 5. A motor side timing pulley 35 is fixed to the output shaft 33 of the motor 31. A ball screw shaft side timing pulley 37 is fixed to the right end of the ball screw shaft 15 in Fig. 5. A timing belt 39 is wound around the motor side timing pulley 35 and the ball screw shaft side timing pulley 37. The output shaft 33, motor side timing pulley 35, ball screw shaft side timing pulley 37, and timing belt 39 are housed in the transmission mechanism case 5.

A circuit board case 41 is provided behind the transmission mechanism case 5 (on the right side in FIG. 5). A circuit board 43 is provided inside the circuit board case 41. As shown in FIG. 2, the circuit board case 41 is also provided with an external interface connector 45 and a teaching device connector 47.

For example, as shown in Figs. 2 and 5, the motor case 7 is installed on the upper side of the transmission mechanism case 5 in Fig. 5. The motor 31 is disposed inside the motor case 7. The motor case 7 is composed of a motor case body 51 and removable covers 53, 53.

The motor case body 51 is composed of an upper panel 55 installed on the upper side in FIG. 5, a lower panel 57 installed on the lower side in FIG. 5, and a front panel 59 installed on the left side in FIG. 5. The motor case body 51 is fixed by passing mounting bolts 61, 61 through the front panel 59 and upper panel 55 and screwing them into the transmission mechanism case 5, and passing mounting bolts 63, 63 through the front panel 59 and lower panel 57 and screwing them into the transmission mechanism case 5.

For example, as shown in FIG. 6, the detachable covers 53, 53 are detachably installed on the motor case main body 51. Engagement protrusions 71, 71 are formed on both sides in the width direction (left and right direction in FIG. 6) of the upper panel 55 of the motor case main body 51, and engagement protrusions 71, 71 are also formed on both sides in the width direction (left and right direction in FIG. 6) of the lower panel 57. Engagement recesses 73 corresponding to the engagement protrusions 71 are formed on the detachable covers 53, 53.

When the detachable covers 53, 53 are attached to both the left and right sides of the motor case body 51 in FIG. 6, the engaging protrusions 71 and the engaging recesses 73 are engaged with each other, thereby fixing the detachable covers 53, 53 to the motor case body 51.
When removing the detachable covers 53, 53 from the motor case main body 51, the motor case main body 51 side of the detachable cover 53 (the left side in Figure 6(a) of the detachable cover 53 on the right side in Figure 6(a) and the right side in Figure 6(a) of the detachable cover 53 on the left side in Figure 6(a)) is pressed and deformed in the vertical direction in Figure 6 with a finger or the like to release the engagement between the engaging protrusion 71 and the engaging recess 73.

2 and 6, the actuator body 3 is provided with a plurality of mounting through holes 81. Bolts 83 for fixing the actuator 1 are inserted into these mounting through holes 81, as shown in Fig. 6. The mounting through holes 81 are disposed between the guide rod 29 and the ball screw shaft 15. Although all or a part of the mounting through holes 81 are covered by the motor case 7, the covered mounting through holes 81 can be exposed by removing the removable covers 53, 53.
The position of the mounting through hole 81 is the same as that of another type of actuator (not shown) (e.g., an air cylinder), so that the other type of actuator can be replaced with the actuator 1 using an electric motor 31.
In addition, in the illustrated example, some of the mounting through holes 81 are blocked by the motor case 7, but if the length of the motor case 7 (the size in the left-right direction in FIG. 3(a)) is set so as to cover the tip side of the actuator main body 3 as shown by the virtual line in FIG. 3, all of the mounting through holes 81 will be blocked.

Next, the operation of the first embodiment will be described.
First, the operation of the actuator 1 will be described.
When the output shaft 33 of the motor 31 is rotated, the rotation of the output shaft 33 is transmitted by the motor-side timing pulley 35, the timing belt 39, and the ball screw shaft-side timing pulley 37, thereby rotating the ball screw shaft 15. When the ball screw shaft 15 is rotated, the ball screw nut 19 and the rod 21, and further the moving body 25 and the stopper 6 are moved forward or backward.
As shown in FIG. 1, the actuator 1 is installed under the conveyor 2 and restricts the movement of the transported object 4 by causing the stopper 6 to appear above the conveyor 2 .

Next, the installation of the actuator 1 will be described.
When the actuator 1 is installed and fixed at the mounting location, the removable covers 53, 53 are separated from the motor case body 51 to expose the mounting through-holes 81 that were covered by the removable covers 53, 53. Then, bolts 83 are inserted into the mounting through-holes 81 and screwed into the mounting location to fix the actuator 1. Then, the removable covers 53, 53 are attached to the motor case body 51 again.
When removing the actuator 1, similarly, the removable covers 53, 53 are separated from the motor case body 51 to expose the mounting through-holes 81, and the bolts 83 are removed.

Next, the effects of the first embodiment will be described.
The motor case 7 is composed of a motor case main body 51 and detachable covers 53, 53. By separating the detachable covers 53, 53, the mounting through-holes 81 that were covered by the detachable covers 53, 53 can be exposed. Therefore, the folded-back structure of the actuator 1 saves space and allows the actuator 1 to be easily attached and detached.
In addition, the detachable covers 53, 53 are fixed to the motor case main body 51 by engaging the engaging protrusions 71 and the engaging recesses 73, and the engagement between the engaging protrusions 71 and the engaging recesses 73 can be released by pressing and deforming the detachable cover 53 with a finger or the like, making it easy to attach and detach the cover.
Furthermore, since the mounting through hole 81 is disposed between the guide rod 29 and the ball screw shaft 15, further space saving can be achieved and the mounting through hole can be exposed with a simple configuration.

The second embodiment of the present invention will now be described with reference to Figures 7 and 8. The actuator 101 according to this second embodiment has a configuration similar to that of the actuator 1 according to the first embodiment described above, but uses a motor case 103 as shown in Figure 7.

The motor case 103 is composed of a motor case fixed base portion 105 and opening/closing covers 107 and 109 .
The motor case fixed-side base portion 105 is fixed to the transmission mechanism case 5 as shown in Fig. 7. The motor case fixed-side base portion 105 is a substantially rectangular frame as shown in Fig. 8, and is provided with two bearing portions 111 on each side in the width direction (the direction from the upper left to the lower right in Fig. 8).

As shown in FIG. 8, the opening and closing cover 107 is made up of a movable base 121, a side cover 123, and a front cover 125.
As shown in FIG. 8, the opening and closing cover 109 is made up of a movable base 126, a side cover 127, and a front cover 129.

The movable base 121 is formed in a roughly U-shape that is half of the motor case fixed base 105 , and is provided with shafts 131 , 131 that engage with bearings 111 , 111 on one side of the motor case fixed base 105 .
The movable base 126 has a configuration similar to that of the movable base 121, and has a shape that is bilaterally symmetrical to the movable base 121. Shafts 131, 131 of the movable base 126 are engaged with bearings 111, 111 on the other side of the motor case fixed side base 105.

The side cover 123 has a generally U-shaped cross section. The side cover 127 has the same configuration as the side cover 123 and is symmetrical to the side cover 123.

The front cover 125 is shaped to close the end of the side cover 123, and has engaging protrusions 141, 141 formed on the side facing the opening/closing cover 109 (the lower right side in FIG. 8).
The front cover 129 has a similar configuration to the front cover 125 and has a shape that is approximately symmetrical to the side cover 123, but is formed with engagement recesses 143, 143 into which the engagement protrusions 141, 141 engage when the opening/closing cover 107 and the opening/closing cover 109 are faced to each other.

As shown in FIG. 8, the opening and closing cover 107 is formed by passing bolts 151, 151 through the movable base 121, the side cover 123, and the front cover 125, and screwing them into nuts 153, 153.
As shown in FIG. 8, the opening and closing cover 109 is also configured by passing bolts 155, 155 through the movable base 126, the side cover 127, and the front cover 129, and screwing them into nuts 157, 157.

The openable cover 107 is rotatably mounted on the motor case fixed base portion 105 by engaging the shaft portions 131 , 131 with bearing portions 111 , 111 on one side of the motor case fixed base portion 105 .
The opening/closing cover 109 is also rotatably mounted on the motor case fixed base portion 105 by engaging the shaft portions 131 , 131 with the bearing portions 111 , 111 on the other side of the motor case fixed base portion 105 .

Next, the operation of the second embodiment will be described.
In the case of the actuator 101 according to the second embodiment, as shown in FIG. 7, by opening the opening/closing covers 107 and 109, the mounting through-hole 81 that was covered by the opening/closing covers 107 and 109 is exposed.

This second embodiment also provides the same effects as the first embodiment described above.

A third embodiment of the present invention will now be described with reference to FIGS.
An actuator 201 according to the third embodiment has a structure almost similar to that of the actuator 1 according to the first embodiment described above, but uses a motor case 203 as shown in FIG.

The motor case 203 is composed of a motor case body 205 and opening/closing covers 207, 207.

The motor case body 205 is composed of an upper panel 211 installed on the upper side in FIG. 9(b), a lower panel 213 installed on the lower side in FIG. 9(b), and a front panel 215 installed on the left side in FIG. 9(b). The motor case body 205 is fixed by passing mounting bolts 217, 217 through the front panel 215 and the upper panel 211 and screwing them into the transmission mechanism case 5, and passing mounting bolts 219, 219 through the front panel 215 and the lower panel 213 and screwing them into the transmission mechanism case 5.

The opening and closing covers 207, 207 are rotatably installed on both sides in the width direction of the motor case body 205. Engagement recesses 221, 221 having an arc-shaped cross section are formed on both sides in the width direction (left and right direction in FIG. 10) of the top panel 211 of the motor case body 205, and engagement portions 223, 223 having a circular cross section are formed on the base end side of the opening and closing cover 207.

The opening/closing covers 207, 207 are rotatably integrated with the motor case body 205 by engaging the engagement parts 223, 223 with the engagement recesses 221, 221, passing the bolts 231, 231 through the front panel 215 and the engagement parts 223, 223 of the opening/closing covers 207, 207, and screwing them into the transmission mechanism case 5.

In addition, an engagement recess 241 is formed on the lower end side of the opening/closing cover 207, and engagement protrusions 243, 243 are formed on both sides of the width direction (left and right direction in FIG. 10) of the lower panel 213. When the opening/closing covers 207, 207 are closed, the engagement recess 241 engages with the engagement protrusion 243, preventing the opening/closing cover 207 from opening accidentally.

Next, the operation of the third embodiment will be described.
In the case of the actuator 201 according to the third embodiment, by opening the opening/closing covers 207, 207, the mounting through-hole 81 that was covered by the opening/closing covers 207, 207 is exposed.

This third embodiment also provides the same effects as the first embodiment described above.

A fourth embodiment of the present invention will now be described with reference to FIGS.
An actuator 301 according to the fourth embodiment has a structure almost similar to that of the actuator 1 according to the first embodiment described above, but uses a motor case 303 as shown in FIG.

The motor case 303 is composed of a motor case body 305 and slide covers 307, 307.

The motor case body 305 is composed of an upper panel 311 installed on the upper side in FIG. 11(b), a lower panel 313 installed on the lower side in FIG. 11(b), and a front panel 315 installed on the left side in FIG. 11(b). The motor case body 305 is fixed by passing mounting bolts 317, 317 through the front panel 315 and the upper panel 311 and screwing them into the transmission mechanism case 5, and passing mounting bolts 319, 319 through the front panel 315 and the lower panel 313 and screwing them into the transmission mechanism case 5.

The slide covers 307, 307 are installed on both sides of the motor case body 305 in the width direction. The slide cover 307 has a cover guide groove 321 that extends in the length direction (toward the paper surface in FIG. 12) as shown in FIG. 12. The cover guide groove 321 has a slide movement groove 323 that extends in the movement direction of the slide cover 307 (up and down direction in FIG. 12), and a lock groove 325 that is provided on the top and bottom ends of the slide movement groove 323 in FIG. 12 and extends in the width direction (left and right direction in FIG. 12).

As shown in Fig. 12, shafts 327, 327 are installed on the upper surface (upper side in Fig. 12) of both sides in the width direction (left and right direction in Fig. 12) of the motor case body 305, oriented in the length direction (direction of the paper in Fig. 12). The shaft 327 is disposed so as to pass through the cover guide groove 321 of the slide cover 307. The slide cover 307 is movable within a range limited by the shaft 327 and the cover guide groove 321.
As shown in FIG. 13, a shaft engaging protrusion 329 is provided within the locking groove 325, and when the slide cover 307 is moved inward (to the left in the case of the slide cover 307 on the right side in FIG. 12, and to the right in the case of the slide cover 307 on the left side in FIG. 12), the shaft 327 engages with it, thereby restricting the movement of the slide cover 307.

In addition, an engagement protrusion 331 is provided on the upper end side of the slide cover 307 (upper side in FIG. 12(b)), and engagement recesses 333, 333 are provided on both sides of the engagement protrusion 331 in the vertical direction in FIG. 12(b). In addition, an engagement protrusion 335 is provided on the lower end side of the slide cover 307 (lower side in FIG. 12(b)), and engagement recesses 337, 337 are provided on both sides of the engagement protrusion 335 in the vertical direction in FIG. 12(b).

Engagement protrusions 341 are provided on both sides of the width direction (left-right direction in FIG. 12) of the upper panel 311 of the motor case body 305, protruding inward (lower side in FIG. 12). In addition, engagement protrusions 343 are provided on both sides of the width direction (left-right direction in FIG. 12) of the lower panel 313 of the motor case body 305, protruding inward (upper side in FIG. 12).

12(a), when the slide cover 307 is lowered to the lower side in Fig. 12(a) and moved inward (to the left in the case of the slide cover 307 on the right side in Fig. 12, and to the right in the case of the slide cover 307 on the left side in Fig. 12), the motor case 303 can be fixed in a closed state by the slide cover 307. At this time, the upper engagement recess 333 of the engagement protrusion 331 is engaged with the engagement protrusion 341, and the lower engagement recess 337 of the engagement protrusion 335 is engaged with the engagement protrusion 343.
At this time, the slide cover 307 covers some of the mounting through holes 81 .

As shown in Fig. 12(b), when the slide cover 307 is raised to the upper side in Fig. 12(b) and moved inward (to the left in the case of the slide cover 307 on the right side in Fig. 12, and to the right in the case of the slide cover 307 on the left side in Fig. 12), the motor case 303 can be fixed in an open state by the slide cover 307. At this time, the upper engaging recess 337 of the engaging protrusion 335 and the engaging protruding portion 341 are engaged with each other.
At this time, the mounting through-holes 81 that were covered by the slide cover 307 are exposed.

When releasing the engagement between the engagement projections 331, 335 and the engagement projections 341, 343 of the slide cover 307, the slide cover 307 is moved outward (to the right in the case of the slide cover 307 on the right side in FIG. 12, and to the left in the case of the slide cover 307 on the left side in FIG. 12).

Next, the operation of the fourth embodiment will be described.
In the case of the actuator 301 according to the fourth embodiment, by opening the slide cover 307, the mounting through-hole 81 that was covered by the slide cover 307 is exposed.

This fourth embodiment also provides the same effects as the first embodiment described above.

The present invention is not limited to the first to fourth embodiments.
Various shapes, dimensions, etc. of each component are possible.
Additionally, the configurations shown in the drawings are merely examples.

The present invention relates to a ball screw shaft support structure and actuator, and in particular to a folded structure in which the actuator body and motor case are arranged overlapping each other, which saves space and is designed to be easily attached and detached, and is suitable for industrial robots, for example.

REFERENCE SIGNS LIST 1 actuator 3 actuator body 5 transmission mechanism case 7 motor case 15 ball screw shaft 19 ball screw nut 29 guide rod 53 removable cover 81 mounting through hole 101 actuator 103 motor case 107 opening/closing cover 109 opening/closing cover 201 actuator 203 motor case 207 opening/closing cover 301 actuator 303 motor case 307 slide cover

Claims (7)

an actuator body having an attachment through hole into which a bolt to be screwed into an attachment portion is inserted ;
A motor case;
Equipped with
An actuator, characterized in that the actuator body and the motor case are arranged overlapping each other by a folded structure, and the mounting through hole is covered by the motor case. 2. The actuator of claim 1,
An actuator characterized in that the mounting through-hole is exposed by removing a portion of the motor case from an installation location. 3. The actuator according to claim 2,
An actuator, characterized in that at least a portion of the motor case facing the actuator body and a side surface thereof are removed to expose the mounting through-hole. The actuator according to claim 2 or 3,
An actuator, wherein a portion of the motor case is separated and removed to expose the mounting through-hole. The actuator according to claim 2 or 3,
The actuator is characterized in that a part of the motor case is rotated and removed to expose the mounting through hole. The actuator according to claim 2 or 3,
The actuator is characterized in that a part of the motor case is slid and removed to expose the mounting through hole. The actuator according to any one of claims 1 to 6,
a ball screw shaft that is rotated and driven by a motor installed in the motor case and installed in the center of the actuator body;
A ball screw nut is screwed onto the ball screw shaft,
a guide rod is provided on both sides of the ball screw shaft in a direction perpendicular to the axial direction of the ball screw shaft and moves forward and backward in conjunction with the ball screw nut;
The actuator is characterized in that the mounting through hole is provided between the ball screw shaft and the guide rod.

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