JP6375419B2 - Electric switchgear - Google Patents

Description

  The present invention relates to an electric opening / closing device that performs an opening / closing operation by driving an output member by a driving force of a motor.

  As an electric opening and closing device that performs an opening and closing operation by driving an output member by a driving force of a motor, for example, a toilet lid / toilet seat opening and closing device that opens and closes a toilet seat or a toilet lid has been proposed. The motor and the output member are held inside the case body.

  In addition, when attaching the electric switchgear to various devices, a structure has been proposed in which a screw is attached to the portion where the case body and the device frame overlap from the direction perpendicular to the rotation center axis of the output member. (See Patent Document 1).

Japanese Patent Laid-Open No. 11-76105

  However, when the screw is fastened from the direction perpendicular to the rotation center axis of the output member and the case body is attached to various devices, the electric opening / closing device is inclined due to the tightening amount of the screw, and the rotation center of the output member There is a problem that the axis is inclined. Such an inclination of the output member is not preferable because it causes an extra load or malfunction during the opening / closing operation.

  In view of the above problems, an object of the present invention is to suppress tilting of the rotation center axis of the output member even if the amount of tightening of the screw fluctuates when the case body is attached to the device with screws. An object of the present invention is to provide an electric switchgear that can be used.

  In order to solve the above problems, an electric switchgear according to the present invention includes a motor, an output member to which rotation of the motor is transmitted, and a case body that holds the motor and the output member inside, In the case body, a plurality of first screws for fixing the case body to the device are respectively provided on one side surface in the extending direction of the rotation center axis line of the output member and the rotation center axis line of the output member. A plurality of first screwing portions that are stopped from a parallel direction or a direction that is inclined obliquely with respect to the rotation center axis, and a first attachment surface that is orthogonal to the rotation center axis; The first case member to which the output side end of the body of the motor is fixed, the second case member facing the first case member on the one side, and the rotation center axis line to the first case member On the other side of the extending direction of A third case member facing the output member, wherein the output member is rotatably supported by the first case member, and the first screwing portion is provided on the first case member. Features.

In the present invention, when the case body is attached to the device with screws, a plurality of first screws are inclined on the surface on one side of the case body in a direction parallel to the rotation center axis of the output member or obliquely with respect to the rotation center axis. Since the first screwing part that stops from the direction and the first mounting surface that is orthogonal to the rotation center axis are provided, even if the tightening amount of the first screw varies, the posture of the case body is It is defined by a first mounting surface orthogonal to the rotation center axis. For this reason, even if the tightening amount of the first screw varies, it is possible to suppress the posture of the case body, that is, the tilt of the rotation center axis of the output member.

  Further, in the present invention, the case body includes a first case member to which an output side end portion of the body portion of the motor is fixed, a second case member facing the first case member on the one side, A third case member facing the other side of the first case member, the output member being rotatably supported by the first case member, and the first screwing portion being the first screw member. The case member is provided. For this reason, an output member can be arranged with a suitable posture in the state where the 1st case member was fixed to an apparatus with the 1st screwing part.

  In the present invention, it is preferable that the surface on the one side of the plurality of first screwing portions constitutes a part of the first mounting surface. According to such a configuration, even if the tightening amount of the first screw varies, the posture of the case body is reliably defined by the first mounting surface orthogonal to the rotation center axis, so that the rotation center of the output member Inclination of the axis can be suppressed.

  In the present invention, the plurality of first screwing portions include two first screwing portions having different distances in the length direction of the case body perpendicular to the rotation center axis from the output member, The distance in the length direction of the two first screwing portions is the length direction of the first screwing portion closer to the output member and the output member of the two first screwing portions. Preferably longer than the distance. According to such a configuration, the two first screwing portions are sufficiently separated from each other, so that the case body can be reliably fixed in an appropriate posture.

  In the present invention, the output member is rotatably supported by the first case member and the third case member, and the case body is fixed to the device on the other surface of the case body. Therefore, it is preferable that a plurality of second screwing portions are provided on a second mounting surface orthogonal to the rotation center axis, and the second screwing portions are provided on the third case member. According to this configuration, the output member is arranged in an appropriate posture in a state where the third case member is fixed to the device by the second screwing portion.

  In this invention, it is preferable that the said 1st screwing part is comprised by the cylinder part protruded toward the opening part of the said 2nd case member from the said 1st case member. According to such a configuration, the first screwing portion can be easily exposed from the second case member toward one side.

  In the present invention, the case body is used for a reduction gear train that decelerates the rotation of the motor and transmits it to the output member, a rotation detector that detects the rotational position of the output member, and the reduction wheel train. A rotation detecting driven gear that meshes with any one of a plurality of gears and transmits the rotation of the gear to the rotation detecting unit, and the first case member or the third case member includes A stopper portion for defining a stop position of the output member, and a gear on the output side of the rotation detecting driven gear in the reduction gear train is directly or directly supported by the first case member and the third case member. It is preferable that the rotation detection unit is rotatably supported via a shaft, and the rotation detection unit is disposed between the first case member and the second case member. According to this configuration, when assembling the electric switchgear, the gear on the output side of the reduction gear train and the rotation detection gear are matched with the state where the output member is stopped at a predetermined position without the second case member. Since the position of the driven gear can be adjusted, the reference position (origin position) of the rotation detection unit can be easily set.

In the present invention, the first case member and the second case member are positioned by fitting the first screwing portion and the opening portion, and the rotation detection driven gear includes the first case member and the first case member. It is preferable that the second case member is rotatably supported directly or via a support shaft. According to such a configuration, the first case member and the second case member can be properly positioned by fitting the first screwing portion and the opening, so that the rotation detecting driven gear can be positioned in an appropriate posture. The first case member and the second case member are supported directly or via a support shaft.

  In the present invention, the rotation detecting driven gear and the large-diameter gear of the first gear meshing with the motor pinion in the reduction gear train are disposed between the first case member and the second case member. It is preferable. According to this configuration, since the first gear is disposed between the first case member and the second case member, the dimension (thickness dimension) of the case body in the extending direction of the rotation center axis is reduced. Can do.

  In the present invention, the first screwing portion for stopping the plurality of first screws from a direction parallel to the rotation center axis of the output member or a direction inclined obliquely with respect to the rotation center axis is provided on one surface of the case body. Since the first mounting surface orthogonal to the rotation center axis is provided, even if the tightening amount of the first screw varies, the posture of the case body is the first orthogonal to the rotation center axis. Defined by the mounting surface. For this reason, even if the tightening amount of the first screw varies, it is possible to suppress the posture of the case body, that is, the tilt of the rotation center axis of the output member. The case body includes a first case member to which an output side end portion of the body portion of the motor is fixed, a second case member facing the first case member on the one side, and the first case member. A third case member facing the other side of the extending direction of the rotation center axis, and the output member is rotatably supported by the first case member, and the first screwing portion is Since the first case member is provided, the output member can be arranged in an appropriate posture in a state where the first case member is fixed to the device by the first screwing portion.

It is explanatory drawing of the western style toilet bowl in which the electric switchgear to which this invention is applied is mounted. It is a perspective view of the electric switchgear to which the present invention is applied. It is a side view of the electric switchgear to which the present invention is applied. It is explanatory drawing of the reduction gear train etc. which were used for the electric switchgear to which this invention is applied. It is a disassembled perspective view of the electric switchgear to which the present invention is applied. It is a perspective view of the 1st case member used for the electric switchgear to which the present invention is applied. It is explanatory drawing which shows the structure of the other side of the Z direction of the 2nd case member used for the electric switchgear to which this invention is applied. It is a perspective view of the reduction gear train provided in the electric switchgear to which the present invention is applied. It is a perspective view of the 2nd gear of the reduction gear train provided in the electric switchgear to which the present invention is applied. In the electric switchgear to which the present invention is applied, it is a sectional view showing a configuration between a rotation detection unit and a first gear.

  Hereinafter, an electric switchgear according to an embodiment of the present invention will be described with reference to the drawings. In the following description, for convenience of description, directions orthogonal to each other will be referred to as an X direction, a Y direction, and a Z direction, and a direction parallel to the rotation center axis L of the output member will be described as a Z direction. Further, the length direction (vertical direction) of the electric switchgear is set as the Y direction, and the width direction (horizontal direction) of the electric switchgear is set as the X direction. Also, one side in the X direction is X1, the other side in the X direction is X2, one side in the Y direction is Y1, the other side in the Y direction is Y2, one side in the Z direction is Z1, and Let the other side be Z2. The direction in which the rotation center axis L of the output member extends will be described as the Z direction. Further, one side in the direction in which the rotation center axis L of the output member extends is L1, and the other side is L2. Further, the one side L1 in the direction in which the rotation center axis L of the output member extends and the one side Z1 in the Z direction are the same direction, and the other side L2 and Z in the direction in which the rotation center axis L extends. Let the other side Z2 of a direction be the same direction.

(Explanation of Western toilet)
FIG. 1 is an explanatory view of a Western-style toilet equipped with an electric switchgear to which the present invention is applied. A western toilet 100 shown in FIG. 1 includes a toilet body 110, a toilet seat 120 covering the toilet body 110, a toilet lid 130 covering the toilet seat 120, a tank 140, and the like. Each of the toilet seat 120 and the toilet lid 130 is provided with the electric opening / closing device 1, and the toilet seat 120 and the toilet lid 130 are driven by an output member (to be described later) of the electric opening / closing device 1 to rotate around the rotation center axis L. . In addition, when the electric opening / closing device 1 is provided only on one of the toilet seat 120 and the toilet lid 130, or the electric opening / closing device 1 is provided only on the toilet seat 120, the toilet lid 130 may be switched from the closed posture to the open posture. .

(Overall configuration and fixing structure of the electric switchgear 1)
FIG. 2 is a perspective view of the electric switchgear 1 to which the present invention is applied. FIGS. 2A and 2B are a perspective view of the electric switchgear 1 viewed from one side Z1 in the Z direction, and the electric switchgear. It is the perspective view which looked at 1 from the other side Z2 of the Z direction. FIG. 3 is a side view of the electric switchgear 1 to which the present invention is applied. FIGS. 3A and 3B are a side view of the electric switchgear 1 viewed from the other side X2 in the X direction, and the electric switchgear. It is the side view which looked at 1 from the one side X1 of the X direction.

  FIG. 4 is an explanatory diagram of a reduction gear train and the like used in the electric switchgear 1 to which the present invention is applied. FIGS. 4 (a) and 4 (b) show the reduction gear train and the like viewed from one side Z1 in the Z direction. It is sectional drawing when the electric switchgear 1 is cut | disconnected along the center view and the gear center of a reduction gear train. That is, FIG. 4B is a cross-section when the electric switching device 1 is cut in the Z direction along the position Po-Pb-Pd-Pe-Pf-Pg-Ph along the gear center of the reduction gear train. FIG.

  As shown in FIG. 2, FIG. 3, and FIG. 4, the electric opening / closing device 1 of the present embodiment generally includes a motor 2, an output member 3, and a reduction gear train that decelerates rotation of the motor 2 and transmits it to the output member 3. 4, a motor 2, an output member 3, and a case body 5 that holds the reduction gear train 4 inside. The motor 2 includes a body portion 21 in which a stator is formed, and a motor shaft 22 protruding from an end portion 210 on one side Z1 of the body portion 21 in the Z direction. A motor pinion 24 is fixed to the motor shaft 22.

  The case body 5 includes a first case member 51, a second case member 52 that covers the first case member 51 from one side Z <b> 1 in the Z direction and faces the first case member 51, and the first case member 51. On the other hand, it has the 3rd case member 53 which covers from the other side Z2 of a Z direction, and opposes the 1st case member 51. FIG. In the case body 5, the first case member 51, the second case member 52, and the third case member 53 are connected by a screw 504 that is stopped at the end. In this embodiment, the first case member 51, the second case member 52, and the third case member 53 are all made of resin. For example, the first case member 51 and the third case member 53 are made of PBT resin containing glass fiber, and the second case member 52 is made of ABS resin.

  The output member 3 is composed of a cylindrical member extending in the Z-axis direction, and has a first cylindrical portion 31 and a flange having a larger diameter than the first cylindrical portion 31 from one side Z1 in the Z-axis direction toward the other side Z2. And a second cylindrical portion 33 having a smaller diameter than the first cylindrical portion 31. On the outer peripheral surface of the flange portion 32, a gear 320 that meshes with the final gear (fourth gear 44) of the reduction gear train 4 is formed.

In this embodiment, the output member 3 can rotate and output from both the one side L1 and the other side L2 of the rotation center axis L. More specifically, the first cylindrical portion 31 is formed with a first connecting recess 310 that opens toward one side Z1 in the Z-axis direction, and the first connecting recess 310 has a Z-axis direction. From one side Z1, a drive shaft 150 for driving the toilet seat and the toilet lid shown in FIG. 1 is fitted. At that time, as shown in FIG. 3A, in the state where the surface 501 on one side Z1 in the Z direction of the case body 5 is brought into contact with the frame 170 of the Western-style toilet 100, from one side Z1 in the Z direction, The two first screws 171 and 172 made of self-tapping screws are fixed to the frame 170 and the case body 5 to fix the case body 5 to the frame 170.

  The second cylindrical portion 33 is formed with a second connecting recess 330 that opens toward the other side Z2 in the Z-axis direction, and the second connecting recess 330 is formed from the other side Z2 in the Z-axis direction, A drive shaft 160 for driving the toilet seat and the toilet lid shown in FIG. 1 can be fitted. In the present embodiment, the inner diameter of the first connecting recess 310 is larger than the inner diameter of the second connecting recess 330. For this reason, it is possible to select which of the first connection recess 310 and the second connection recess 330 is connected to the drive shaft according to the outer diameter of the drive shaft. When the drive shaft 160 is fitted into the second connecting recess 330, the surface 502 on the other side Z2 in the Z direction of the case body 5 is in contact with the frame 180 of the western toilet 100, as shown in FIG. Thus, from the other side Z2 in the Z direction, the two second screws 181 and 182 made of self-tapping screws are fixed to the frame 180 and the case body 5, and the case body 5 is fixed to the frame 180.

  As shown in FIG. 3A, when the drive shaft 150 is fitted and used in the first connecting recess 310, as shown in FIG. 3B, the other side Z2 of the case body 5 in the Z direction is shown. With the surface 502 in contact with the frame 180 of the western toilet 100, the two second screws 181 and 182 made of self-tapping screws are fastened to the frame 180 and the case body 5 from the other side Z2 in the Z direction. The case body 5 may be fixed to the frame 180. Further, as shown in FIG. 3B, when the drive shaft 160 is fitted and used in the second coupling recess 330, as shown in FIG. 3A, as shown in FIG. With the surface 501 in contact with the frame 170 of the western toilet 100, the two first screws 171 and 172 made of self-tapping screws are fastened to the frame 170 and the case body 5 from one side Z1 in the Z direction. The case body 5 may be fixed to the frame 170.

(Detailed configuration of the first case member 51)
FIG. 5 is an exploded perspective view of the electric switchgear 1 to which the present invention is applied. FIGS. 5A and 5B show a state in which the second case member 52 is removed from the electric switchgear 1 in one of the Z directions. FIG. 4 is an exploded perspective view seen from the side Z1, and an exploded perspective view seen from one side Z1 in the Z direction with the second case member 52 and the third case member 53 removed in the electric switching device 1. FIG. 6 is a perspective view of the first case member 51 used in the electric switchgear 1 to which the present invention is applied. FIGS. 6A and 6B show the first case member 51 on one side Z1 in the Z direction. It is the perspective view seen from, and the disassembled perspective view which looked at the 1st case member 51 from the one side Z1 of the Z direction.

  As shown in FIGS. 4, 5, and 6, the first case member 51 is a plate-like member having a thickness direction in the Z direction, a plate-like portion 511 extending in the Y direction, and a plate-like portion. An outer cylindrical portion 512 on the other side Y2 in the Y direction with respect to 511, and a side plate portion 513 formed along an end portion of the plate-like portion 511. The end portion on the other side Z2 in the Z direction of the outer cylindrical portion 512 is an open end, while a bottom plate portion 514 is formed on the end portion on the one side Z1 in the Z direction of the outer cylindrical portion 512. The bottom plate portion 514 is formed with a circular opening 514a that overlaps with the first connecting recess 310 of the output member 3 in the axis L direction.

  In the first case member 51, an inner cylindrical portion 515 that is coaxial with the outer cylindrical portion 512 extends toward the other side Z2 in the Z direction from a position slightly outside the opening edge of the opening 514a of the bottom plate portion 514 toward the other side Z2. The inner cylindrical portion 515 supports the output member 3 via the first cylindrical portion 31 so as to be rotatable. The movement of the output member 3 on one side Z1 in the Z direction is opposite to the step portion 325 formed between the flange portion 32 and the first tube portion 31 on the other side Z2 end of the inner cylindrical portion 515 in the Z direction. Is limited by.

The end of the other side Z2 in the Z direction of the inner cylindrical part 515 is an open end, and the outer cylindrical part 51
A groove 512a that opens toward the other side Z2 in the Z direction is formed between the inner cylindrical portion 515 and the inner cylindrical portion 515 so as to extend in the circumferential direction. A ring-shaped urging member shown in FIG. 4 is disposed in the groove 512a. In this embodiment, the urging member 6 is an assist spring including a coil spring, and one end is connected to the output member 3 and the other end is connected to the first case member 51. For this reason, when the output member 3 rotates around the rotation center axis L, the urging member 6 is twisted. Therefore, if the output member 3 and the first case member 51 are connected in a state where the coil spring of the biasing member 6 is twisted in one direction, the biasing member 6 rotates the output member 3 in one direction. At the same time, a drag force is generated, while a biasing force is generated when the output member 3 rotates in the other direction. Therefore, for example, when the toilet seat 120 and the toilet lid 130 shown in FIG. 1 are switched from the standing posture to the flat posture, the urging member 6 generates a drag, while the toilet seat 120 and the toilet lid 130 are changed from the flat posture to the standing posture. When switching, a biasing force can be generated by the biasing member 6. For this reason, the postures of the toilet seat 120 and the toilet lid 130 can be switched smoothly. Further, the toilet seat 120 and the toilet lid 130 can be kept in a self-supporting state. Note that rib-shaped protrusions 512c extending in the Z direction are formed at a plurality of locations in the circumferential direction on the inner peripheral surface of the outer cylindrical portion 512, and the rib-shaped protrusions 512c are coil springs that are biasing members 6. Is a receiving part when the diameter is expanded.

  In the plate-like portion 511 of the first case member 51, holes 511a and 511b to which screws 291 and 292 are fixed are formed on one side Y1 in the Y direction. The screws 291 and 292 are formed in the holes 511a and 511b. Is fixed to the end portion 210 on one side Z1 of the body portion 21 of the motor 2 in the Z direction. Therefore, the motor 2 is fixed to the first case member 51, and the motor shaft 22 protrudes from the hole 511 c of the plate-like portion 511 of the first case member 51 to one side Y <b> 1 in the Y direction. A motor pinion 24 is fixed to the motor shaft 22.

  As shown in FIG. 6, in the plate-like portion 511, an opening 511e is formed at a substantially central position in the X direction and the Y direction, and the other side Y2 in the Y direction with respect to the opening 511e is from the opening 511e. A large-diameter opening 511f is formed. In the plate-like portion 511, a hole 511r facing the one side Z1 in the Z direction is formed at a position adjacent to the opening 511f on the other side Y2 in the Y direction.

  Further, on the other side Z2 in the Z direction of the plate-like portion 511, an arm portion 511g is formed at a position overlapping the opening 511f on the other side Z2 in the Z direction. The arm portion 511g is bent at a position overlapping with the center of the opening portion 511f, and a shaft hole 511h that opens toward one side Z1 in the Z direction is formed in the bent portion 511i. In the base portion of the arm portion 511g, a cylindrical portion 511s that opens toward the other side Z2 in the Z direction is formed on the other side Z2 in the Z direction, and the other side Z2 in the Z direction is formed on the tip portion of the arm portion 511g. A cylindrical portion 511t that opens toward the bottom is formed.

  On the surface on the other side Z2 in the Z direction of the plate-like portion 511, a cylindrical portion 511u that opens toward the other side Z2 in the Z direction is formed at a position adjacent to the openings 511e and 511f. Further, on the surface of the other side Z2 in the Z direction of the plate-like portion 511, a cylindrical portion 511v that opens toward the other side Z2 in the Z direction is formed at a position adjacent to the opening 511f on the other side Y2 in the Y direction. Has been.

(Configuration of the first screwing portion)
On the surface of one side Z1 in the Z direction of the plate-like portion 511, a first screwing projecting in a cylindrical shape toward the one side Z1 in the Z direction is located adjacent to the opening 511f on the one side X1 in the X direction. A portion 511x is formed, and a first screwing portion 511y protruding in a cylindrical shape toward the one side Z1 in the Z direction is formed at a position adjacent to the hole 511c on the other side X2 in the X direction. The first screwing portions 511x and 511y are portions where the first screws 171 and 172 are stopped when the electric switching device 1 is fixed to the frame 170 as shown in FIG. The first screwing portion 51
1y and the side plate part 513 are connected by a reinforcing rib 511z.

  The surface on one side Z1 in the Z direction of the first screwing portions 511x and 511y is at the same position in the Z direction, and constitutes a part of a first mounting surface 550 (see FIG. 3) described later.

(Detailed configuration of the third case member 53)
2B, 3, 4, and 5, the third case member 53 has a plate-like portion 531 that extends in the Y direction with the thickness direction facing the Z direction, and the plate-like portion 531. The outer cylindrical portion 532 provided at the end portion located on the other side Y2 in the Y direction and the side plate portion 533 formed along the end portion of the plate-like portion 531. The side plate portion 533 includes: It has a shape that stands from the end of the plate-like portion 531 to one side Z1 in the Z direction. An end portion on one side Z1 in the Z direction of the outer cylindrical portion 532 is an open end, and a bottom plate portion 534 is formed on an end portion on the other side Z2 in the Z direction of the outer cylindrical portion 532. The bottom plate portion 534 is formed with a circular opening 534a that overlaps with the second coupling recess 330 of the output member 3 in the axis L direction.

  In the bottom plate portion 534 (see FIG. 4) of the third case member 53, the inner cylindrical portion 535 is coaxial with the outer cylindrical portion 532 from the outer peripheral side position toward the one side Z1 in the Z direction slightly from the opening edge of the opening portion 534a. The inner cylindrical portion 535 supports the output member 3 via the second cylindrical portion 33 so as to be rotatable. The movement of the output member 3 on the other side Z2 in the Z direction is limited by the fact that the end portion of the one side Z1 in the Z direction of the inner cylindrical portion 535 faces the flange portion 32.

  The end of one side Z1 in the Z direction of the inner cylindrical portion 535 is an open end. Therefore, a groove 532a that opens toward the other side Z2 in the Z direction is formed between the outer cylindrical portion 532 and the inner cylindrical portion 535 so as to extend in the circumferential direction. Inside the groove 532a, reinforcing plate-like connecting portions 536 connected to the outer cylindrical portion 532 and the inner cylindrical portion 535 are formed at a plurality of locations in the circumferential direction.

  In the third case member 53, stopper portions 537 (see FIG. 5B) that protrude from the plate-like connecting portion 536 to the one side Z <b> 1 in the Z direction are formed at two locations in the circumferential direction in the groove 532 a. On the other hand, the flange portion 32 of the output member 3 is formed with a convex portion 327 (see FIG. 8A) protruding to the other side Z2 in the Z direction at one location in the circumferential direction. Therefore, the rotation of the output member 3 is limited to an angle range (an angle range sandwiched between the two stopper portions 537) until the convex portion 327 interferes with the two stopper portions 537.

  In the plate-like portion 531 of the third case member 53, a circular shape that receives the end portion on the opposite side of the body portion 21 of the motor 2 (the end portion on the other side Z2 in the Z direction) on the surface on the one side Y1 in the Y direction. The recess 531c is formed. A cylindrical portion 531e having an opening that opens toward the one side Z1 in the Z-axis direction is formed in the concave portion 531c on the other side Y2 in the Y direction on the surface of one side Y1 in the Y direction of the plate-like portion 531. The cylindrical portion 531e passes through an opening 511e formed in the plate-like portion 511 of the first case member 51 and protrudes from the plate-like portion 511 to one side Z1 in the Z direction (see FIG. 4). A cylindrical portion 531u that opens toward the one side Z1 in the Z direction is formed at a position adjacent to the cylindrical portion 531e on the other side Y2 in the Y direction on the surface of one side Y1 in the Y direction of the plate-like portion 531. The cylindrical portion 531u overlaps the cylindrical portion 511u formed on the plate-like portion 511 of the first case member 51 on the other side Z2 in the Z direction. On the surface on the other side Z2 in the Z direction of the plate-like portion 531, a position overlapping with the cylindrical portion 531u is a convex portion 531s.

A cylindrical portion 531t that opens toward one side Z1 in the Z direction is formed at a position adjacent to the cylindrical portion 531u on the other side X2 in the X direction on the surface on the one side Z1 in the Z direction of the plate-like portion 531. The cylindrical portion 531t overlaps the cylindrical portion 511t formed on the plate-like portion 511 of the first case member 51 on the other side Z2 in the Z direction. In the plate-like portion 531, a cylindrical portion 531v that opens toward the one side Z1 in the Z direction is formed at a position adjacent to the cylindrical portion 531t on the other side Y2 in the Y direction, and the cylindrical portion 53v is the first case member. The cylinder portion 511v formed on the 51 plate-like portion 511 overlaps the other side Z2 in the Z direction. On the surface on the other side Z2 in the Z direction of the plate-like portion 531, a position overlapping the cylindrical portion 511v is a convex portion 531r.

  A cylindrical portion 531m that protrudes toward the one side Z1 in the Z direction is formed at a position adjacent to the cylindrical portion 531v on the other side X2 in the X direction on the surface on the one side Z1 in the Z direction of the plate-like portion 531. A convex portion 531n is formed on the tip surface of the cylindrical portion 531m. The cylindrical portion 531m overlaps the cylindrical portion 511s formed on the arm portion 511g of the first case member 51 on the other side Z2 in the Z direction, and the convex portion 531n is fitted inside the cylindrical portion 511s (see FIG. 6). Yes.

(Configuration of second screwing portion and second mounting surface)
A second screw projecting in a cylindrical shape toward the other side Z2 in the Z direction at a position adjacent to the outer cylindrical portion 532 on the one side Y1 in the Y direction on the surface on the other side Z2 in the Z direction of the plate-like part 531. A stop portion 531x is formed, and a second screw stop portion 531y protruding in a cylindrical shape toward the other side Z2 in the Z direction is located at one side X1 in the X direction and one side Y1 in the Y direction of the plate-like portion 531. Is formed. The second screwing portions 531x and 531y are portions where the second screws 181 and 182 are stopped when the electric switching device 1 is fixed to the frame 180, as shown in FIG.

  In the plate-like portion 531, a convex portion 561 is formed at a position overlapping the concave portion 531c on the surface on the other side Z2 in the Z direction, and the convex portion 562 is located at a position adjacent to the convex portion 561 on one side X1 in the X direction. Is formed. The surface on the other side Z2 in the Z direction of the convex portion 561, the surface on the other side Z2 in the Z direction of the convex portion 562, and the surface on the other side Z2 in the Z direction of the bottom plate portion 534 are at the same position in the Z direction. A second attachment surface 560 that is orthogonal to the rotation center axis L of the output member 3 is configured.

  Further, the surface on the other side Z2 in the Z direction of the second screwing portions 531x and 531y is the surface on the other side Z2 in the Z direction of the convex portion 561, the surface on the other side Z2 in the Z direction of the convex portion 562, and the bottom plate portion. A second attachment surface 560 that is at the same position in the Z direction as the surface of the other side Z2 of 534 in the Z direction and that is orthogonal to the rotation center axis L of the output member 3 is configured. The second mounting surface 560 is a surface that comes into contact with the frame 180 when the electric opening / closing device 1 is fixed to the frame 180 as shown in FIG.

(Detailed configuration of second case member 52 and first mounting surface)
FIG. 7 is an explanatory view showing the configuration of the other side Z2 in the Z direction of the second case member 52 used in the electric switchgear 1 to which the present invention is applied, and FIGS. 7 (a), 7 (b), and 7 (c). These are explanatory views showing the positional relationship and the like of the first gear 41 and the rotation detection unit 7 with respect to the second case member 52, explanatory diagrams showing the positional relationship and the like of the first gear 41 with respect to the second case member 52, and the rotation detection unit 7 FIG.

  2A, 3, 4, 5, and 7, the second case member 52 includes a plate-like portion 521 that extends in the Y direction toward the thickness direction in the Z direction, and a plate-like portion. The side plate portion 523 is formed along the end portion of the plate 521, and the side plate portion 523 has a shape standing from the end portion of the plate-like portion 521 to the other side Z2 in the Z direction. In the plate-like portion 521, the end portion on the other side Y <b> 2 in the Y direction is formed in an arc shape along the outer edge of the bottom plate portion 514 of the first case member 51.

In the plate-like portion 521, an opening 521 x into which the first screwing portion 511 x is fitted is formed at a position overlapping the first screwing portion 511 x formed in the first case member 51, and the first case member 51 is provided with a first portion. An opening 521y into which the first screwing portion 511y is fitted is formed at a position overlapping the first screwing portion 511y. In this embodiment, the first screwing portions 511x and 511y pass through the openings 521x and 521y and protrude further to the one side Z1 in the Z direction than the surface on the one side Z1 in the Z direction of the plate-like portion 521.

  Here, on the surface on the one side Z1 in the Z direction of the plate-like portion 521, a convex portion 551 protruding to the one side Z1 in the Z direction at a position overlapping with the motor shaft 22, and a cylindrical portion 531e of the third case member 53, A protruding portion 552 that protrudes to one side Z1 in the Z direction is formed at a position overlapping in the Z direction. The surface on one side Z1 in the Z direction of the convex portion 551, the surface on one side Z1 in the Z direction of the convex portion 552, and the surface on one side Z1 in the Z direction of the bottom plate portion 514 are at the same position in the Z direction. A first attachment surface 550 that is orthogonal to the rotation center axis L of the output member 3 is configured.

  Further, the surface on one side Z1 in the Z direction of the first screwing portions 511x and 511y is the surface on one side Z1 in the Z direction of the convex portion 551, the surface on the one side Z1 in the Z direction of the convex portion 552, and the bottom plate portion. A first attachment surface 550 that is at the same position in the Z direction as the surface of one side Z <b> 1 of 514 in the Z direction and orthogonal to the rotation center axis L of the output member 3 is configured. The first attachment surface 550 is a surface that comes into contact with the frame 170 when the electric opening / closing device 1 is fixed to the frame 170 as shown in FIG.

  The motor pinion 24 and the large-diameter gear 411 of the first gear 41 are constituted by helical teeth for noise reduction. A concave portion 521c is formed at a position overlapping the motor pinion 24 on one side Z1 in the Z direction (position overlapping the convex portion 551 on the other side Z2 in the Z direction) on the surface of the plate-like portion 521 on the other side Z2 in the Z direction. The bottom of the recess 521c supports the motor pinion 24 on one side Z1 in the Z direction. In addition, on the surface on the other side Z2 in the Z direction of the plate-like portion 521, a position overlapping the opening 511e formed in the first case member 51 and the cylindrical portion 531e formed in the third case member 53 on one side Z1 in the Z direction. A concave portion 521e is formed at a position overlapping the convex portion 552 on the other side Z2 in the Z direction.

  In addition, on the surface of the other side Z2 in the Z direction of the plate-like portion 521, the shaft hole 511h formed in the first case member 51 overlaps with the one side Z1 in the Z direction toward the other side Z2 in the Z direction. An open cylindrical portion 521h is formed. In addition, on the surface of the other side Z2 in the Z direction of the plate-like portion 521, three cylindrical portions 521p that open toward the other side Z2 in the Z direction are formed around the cylindrical portion 521h.

  On the surface of the other side Z2 in the Z direction of the plate-like part 521, a columnar part 521r that protrudes toward the other side Z2 in the Z direction is formed on the other side X2 in the X direction and the other side Y2 in the Y direction. The part 521r overlaps the hole 511r formed in the plate-like part 511 of the first case member 51 on one side Z1 in the Z direction. A convex portion 521w is formed on the cylindrical portion 521r, and the convex portion 521w is fitted in a hole 511r (see FIG. 6) of the first case member 51.

(Configuration of the reduction gear train 4)
FIG. 8 is a perspective view of the reduction gear train 4 provided in the electric switchgear 1 to which the present invention is applied. FIGS. 8A and 8B show the reduction gear train 4 viewed from one side Z1 in the Z direction. It is the perspective view which looked at the deceleration wheel train 4 from the other side Z2 of the Z direction.

  As shown in FIGS. 4 and 8, the reduction gear train 4 provided in the electric opening and closing device 1 includes a first gear 41, a second gear 42, a third gear 43, and a transmission path from the motor pinion 24 to the output member 3. A fourth gear 44 is provided in this order.

The first gear 41 includes a large-diameter gear 411 that meshes with the motor pinion 24, and a small-diameter gear 412 that is integrally formed coaxially with the large-diameter gear 411. Rotate together. The first gear 41 is rotatably supported by the support shaft 410, and the support shaft 410 passes through the opening 511 e of the first case member 51 and the recess 521 of the second case member 52.
Both ends are held by e and the cylindrical portion 531e of the third case member 53. In this state, the large-diameter gear 411 of the first gear 41 is positioned between the first case member 51 and the second case member 52, and the small-diameter gear 412 of the first gear 41 is connected to the first case member 51 and the first case member 51. It is located both between the two case members 52 and between the first case member 51 and the third case member 53.

  The second gear 42 includes a large-diameter gear 421 that meshes with the small-diameter gear 412 of the first gear 41, and a small-diameter gear 422 that is provided coaxially with the large-diameter gear 421. The gear 422 rotates integrally. The second gear 42 is rotatably supported on the support shaft 420, and both ends of the support shaft 420 are held by the tube portion 511 u of the first case member 51 and the tube portion 531 u of the third case member 53. Accordingly, the entire second gear 42 is located between the first case member 51 and the third case member 53.

  The third gear 43 includes a large-diameter gear 431 that meshes with the small-diameter gear 422 of the second gear 42 and a small-diameter gear 432 that is formed coaxially with the large-diameter gear 431. The gear 432 rotates integrally. The third gear 43 is rotatably supported by the support shaft 430, and both ends of the support shaft 430 are held by the tube portion 511 t of the first case member 51 and the tube portion 531 t of the third case member 53. Accordingly, the entire third gear 43 is located between the first case member 51 and the third case member 53.

  The fourth gear 44 includes a large-diameter gear 441 that meshes with the small-diameter gear 432 of the third gear 43, and a small-diameter gear 442 that is integrally formed coaxially with the large-diameter gear 441. And the small-diameter gear 442 rotate together. A gear 320 formed on the outer peripheral surface of the flange portion 32 of the output member 3 meshes with the small diameter gear 442. Here, the outer diameter of the gear 320 is larger than the outer diameter of the small-diameter gear 442. The fourth gear 44 is rotatably supported by the support shaft 440, and both ends of the support shaft 440 are held by the tube portion 511 v of the first case member 51 and the tube portion 531 v of the third case member 53. Accordingly, the entire fourth gear 44 is located between the first case member 51 and the third case member 53.

  In the reduction wheel train 4 configured as described above, grease is applied to the tooth surfaces of the first gear 41, the second gear 42, the third gear 43 and the fourth gear 44, and the first gear 41, the second gear 42. The third gear 43 and the fourth gear 44 are both configured as gears with grease. Further, grease is applied to the tooth surfaces of the motor pinion 24 and the gear 320 of the output member 3.

(Configuration of torque limiter)
FIG. 9 is a perspective view of the second gear of the reduction gear train 4 provided in the electric switchgear 1 to which the present invention is applied. FIGS. 9 (a) and 9 (b) show the second gear on one side in the Z direction. They are the perspective view seen from Z1, and the exploded perspective view which looked at the 2nd gear from one side Z1 of the Z direction.

  As shown in FIG. 9, the second gear 42 includes a cup-shaped first rotating member 48 in which a large-diameter gear 421 is formed and a second rotating member 49 in which a small-diameter gear 422 is formed. A torque limiter 47 is formed between the member 48 and the second rotating member 49. More specifically, a large-diameter gear 421 is formed on the outer peripheral surface of the cylindrical body 481 of the first rotating member 48, while the inner peripheral surface of the cylindrical body 481 is viewed from the Z direction. In some cases, a serration portion 480 is formed in which triangular concave portions 482 are repeatedly formed in the circumferential direction.

On the other hand, the second rotating member 49 includes a first tube portion 491 having a small-diameter gear 422 formed on the outer peripheral surface, and a second tube portion 492 adjacent to the first tube portion 491 on the other side Z2 in the Z direction. From the outer peripheral surface of the second cylindrical portion 492, there are formed elastic deformation portions 490 extending from three locations in the circumferential direction in the same direction in the circumferential direction. In addition, a convex portion 493 that bites into the concave portion 482 of the first rotating member 48 is formed at the tip of the elastic deformation portion 490.

  Therefore, normally, the second rotating member 49 and the first rotating member 48 rotate integrally. However, when an excessive load is applied to the first rotating member 48, the elastic deformation portion 490 has the convex portion 493. The rotation of the second rotating member 49 is not transmitted to the first rotating member 48 only by moving to the recesses 482 adjacent in the circumferential direction.

(Configuration of rotation detector)
As shown in FIGS. 4 and 7, the electric switching device 1 of the present embodiment has a rotation detection unit 7 that detects the rotation position of the output member 3. In this embodiment, between the first case member 51 and the third case member 53, meshing with the small-diameter gear 442 of the fourth gear 44 and transmitting the rotation of the fourth gear 44 to the rotation detector 7. A driven gear 70 is provided, and the rotation detection unit 7 detects the rotation position of the output member 3 based on the rotation position of the fourth gear 44 detected via the rotation detection driven gear 70.

  The rotation detecting driven gear 70 includes a disc-shaped gear portion 701, a first shaft portion 703 protruding from the gear portion 701 to one side Z1 in the Z direction, and a first shaft portion 703 protruding from the gear portion 701 to the other side Z2 in the Z direction. A biaxial portion 704. In the rotation detecting driven gear 70, the end portion of the first shaft portion 703 is rotatably supported by a cylindrical portion 521 h formed in the second case member 52, and the end portion of the second shaft portion 704 is supported by the first case member 51. It is rotatably supported by a cylindrical portion 521h formed in the above.

  In this embodiment, the rotation detection unit 7 includes a circuit board 71 to which a flexible wiring board 77 is connected between a first case member 51 and a second case member 52, and a potentiometer 72 mounted on the circuit board 71. I have. Although the detailed description is omitted, the potentiometer 72 has a brush that slides on the resistor.

  The circuit board 71 is fixed to the three cylindrical portions 521p of the second case member 52 by screws 717 and the like, and an opening 511f formed in the plate-like portion 511 of the first case member 51 (see FIG. 6 and the like). Is arranged so as to be covered with one side Z1 in the Z direction. However, an opening 710 is formed in the circuit board 71 at a position overlapping the opening 511f. Therefore, the end portion of the first shaft portion 703 of the rotation detecting driven gear 70 can be inserted into the cylindrical portion 521h of the second case member 52 through the opening 511f and the hole 720 of the potentiometer 72.

  In this embodiment, the first shaft portion 703 has a part of the outer peripheral surface which is a flat surface and has a D-shaped cross section. The hole 720 of the potentiometer 72 also has a D-shaped opening shape. Therefore, the brush of the potentiometer 72 is displaced together with the rotation detection driven gear 70 in a state where the end of the first shaft portion 703 of the rotation detection driven gear 70 is passed through the hole 720 of the potentiometer 72.

(Partition wall configuration)
FIG. 10 is a cross-sectional view showing a configuration between the rotation detection unit 7 and the first gear 41 in the electric switchgear 1 to which the present invention is applied.

  As shown in FIG. 10, in the electric switching device 1 of the present embodiment, the rotation detector 7 includes a potentiometer 72 between the first case member 51 and the second case member 52, and the potentiometer 72 is a first gear. It is arranged at a position adjacent to the large-diameter gear 411 of the first gear 41 on the radially outer side of 41. In this embodiment, the rotation detector 7 is located above the first gear 41 (the other side Y2 in the Y direction).

The first gear 41, the second gear 42, the third gear 43, and the fourth gear 44 are configured as a gear with grease to which grease is applied. Therefore, the rotation detection unit 7 is arranged in the radial direction of the gear with gear. It is arranged on the outside at a position adjacent to the gear with the grease. However, only the large-diameter gear 411 of the first gear 41 in the reduction gear train 4 is disposed between the first case member 51 and the second case member 52 together with the motor pinion 24, and the second gear 42, the third gear. The 43 and fourth gears 44 are disposed between the first case member 51 and the third case member 53. A large-diameter gear 411 of the first gear 41 is interposed between the rotation detector 7 and the motor pinion 24. For this reason, the gear with the grease adjacent to the rotation detection unit 7 is only the large-diameter gear 411 of the first gear 41.

  In this embodiment, as shown in FIGS. 7 and 9, a partition wall 9 is provided between the large-diameter gear 411 of the first gear 41 and the rotation detection unit 7. In this embodiment, the partition wall 9 is composed of a plate-like convex portion that protrudes toward the first case member 51 from the surface of the second case member 52 on the side where the first case member 51 is located. For this reason, the partition wall 9 rotates around the center of the large-diameter gear 411 from a facing region sandwiched between the large-diameter gear 411 (geared gear adjacent to the rotation detection unit 7) of the first gear 41 and the rotation detection unit 7. It extends to one side X1 and the other side X2 in the X direction intersecting the line connecting the center of the detection unit 7. Further, the partition wall 9 continuously extends to the inner surface (case inner wall) of the side plate portion 523 provided on both sides in the X direction, and both ends of the partition wall 9 are connected to the side plate portion 523 of the second case member 52. ing. Here, the opposing region sandwiched between the large-diameter gear 411 and the rotation detection unit 7 is the end of one side X1 in the X direction of the large-diameter gear 411 and the end of one side X1 in the X direction of the rotation detection unit 7. This is a region sandwiched between a line connecting the two portions and a line connecting the end portion on the other side X2 in the X direction of the large-diameter gear 411 and the end portion on the other side X2 in the X direction of the rotation detection unit 7. In this embodiment, the convex portion constituting the partition wall 9 has an arcuate portion 90 that curves so as to follow the large-diameter gear 411 of the first gear 41.

  The partition wall 9 is connected to the cylindrical portion 521 h of the second case member 52, and the portion connected to the partition wall 9 and the cylindrical portion 521 h is a notch 91 for arranging the corner portion of the circuit board 71. Yes. For this reason, the part of the partition wall 9 that is connected to the cylindrical part 521h is lowered by the depth of the notch 91. However, as shown in FIG. The large diameter gear 411 is covered.

(Manufacturing process of the electric switchgear 1)
In the manufacturing process of the electric switchgear 1 of the present embodiment, first, between the first case member 51 and the third case member 53, among the plurality of gears used for the output member 3 and the reduction gear train 4, rotation is performed. The angular position of the rotation detection driven gear 70 is adjusted in a state where the output side gear is arranged with respect to the detection driven gear 70. In the present embodiment, the fourth gear 44 is the only gear on the output side of the rotation detecting driven gear 70 in the reduction gear train 4, so that the fourth gear 44 is interposed between the first case member 51 and the third case member 53. The angular position of the rotation detecting driven gear 70 is adjusted in the arranged state. In this embodiment, the second gear 42, the third gear 43, and the motor 2 are also disposed between the first case member 51 and the third case member 53, and the state before only the first gear 41 is disposed. The angular position of the rotation detecting driven gear 70 is adjusted.

  More specifically, the rotation detecting driven gear 70 is engaged with the fourth gear 44 in a stopped state in which the convex portion 327 of the output member 3 is in contact with the stopper portion 537. At this time, the rotation detection driven gear 70 is provided with a mark (not shown) indicating a tooth to be engaged with the fourth gear 44 in this state. The angular position of the rotation detecting driven gear 70 and the angular position of the potentiometer 72 are determined by the D shape of the first shaft portion 703 of the rotation detecting driven gear 70 and the D shape of the hole 720 of the potentiometer 72. Accordingly, when the predetermined tooth of the rotation detecting driven gear 70 is engaged with the fourth gear 44 in the stopped state (reference state) in which the convex portion 327 of the output member 3 is in contact with the stopper portion 537, the angle of the potentiometer 72 is set. The position can be adjusted to the reference state of the output member 3.

(Main effects of this form)
As described above, in the electric opening and closing device 1 of the present embodiment, the plurality of first screws 171 and 172 for fixing the case body 5 to the device are respectively provided on the surface of the case body 5 on one side Z1 in the Z direction. First screwing portions 511x and 511y that are fixed from a direction parallel to the rotation center axis L of the output member 3 and a first attachment surface 550 that is orthogonal to the rotation center axis L are provided. For this reason, as shown in FIG. 3A, when the first screws 171 and 172 are stopped, the posture of the case body 5 does not change even if the tightening amount of the first screws 171 and 172 varies. Defined by a first mounting surface 550 orthogonal to L. Moreover, since the surface on the one side Z1 in the Z direction of the first screwing portions 511x and 511y constitutes a part of the first mounting surface 550, the tightening amount of the first screws 171 and 172 varies. However, the posture of the case body 5 is reliably defined by the first attachment surface 550 that is orthogonal to the rotation center axis L. Therefore, even if the tightening amounts of the first screws 171 and 172 vary, the posture of the case body 5, that is, the rotation center axis L of the output member 3 can be suppressed from being inclined.

  Here, the distance in the length direction (Y direction) of the two first screwing portions 511x and 511y is the length direction (Y direction) between the first screwing portion 511x closer to the output member 3 and the output member 3. ) Longer than the distance. For this reason, since the two first screwing portions 511x and 511y are sufficiently separated from each other, the case body 50 can be reliably fixed in an appropriate posture.

  Further, on the surface of the other side Z2 of the case body 5 in the Z direction, a plurality of second screws 181 and 182 for fixing the case body 5 to the device are respectively parallel to the rotation center axis L of the output member 3 The second screwing portions 531x and 531y that are fastened from the second side and the second attachment surface 560 that is orthogonal to the rotation center axis L are provided. Therefore, as shown in FIG. 3B, when the second screws 181 and 182 are stopped, even if the tightening amounts of the second screws 181 and 182 vary, the posture of the case body 5 remains at the rotation center axis. Defined by a second mounting surface 560 orthogonal to L. In addition, since the surface on the other side Z2 in the Z direction of the second screw fastening portions 531x and 531y constitutes a part of the second mounting surface 560, the tightening amount of the second screws 181 and 182 varies. However, the posture of the case body 5 is reliably defined by the second mounting surface 560 orthogonal to the rotation center axis L. Therefore, even if the tightening amounts of the second screws 181 and 182 vary, the posture of the case body 5, that is, the rotation center axis L of the output member 3 can be suppressed from being inclined.

  Here, the distance in the length direction (Y direction) of the two second screwing portions 531x and 531y is the length direction (Y direction) between the second screwing portion 531x closer to the output member 3 and the output member 3. ) Longer than the distance. For this reason, since the two second screwing portions 531x and 531y are sufficiently separated from each other, the case body 50 can be reliably fixed in an appropriate posture.

  The first screwing portions 511x and 511y and the second screwing portions 531x and 531y are respectively formed on the first case member 51 and the third case member 53 that rotatably support the output member 3. For this reason, the output member 3 is in an appropriate posture both when the case body 5 is fixed by the first screwing portions 511x and 511y and when the case body 5 is fixed by the second screwing portions 531x and 531y. Be placed.

  In addition, since a large load is not applied to the second case member 52, the second case member 52 does not need to have a large strength. Therefore, the second case member 52 can be made thin and can be made of inexpensive general-purpose resin.

In addition, since the first screwing portions 511x and 511y are constituted by cylindrical portions protruding from the first case member 51 toward the openings 521x and 521y of the second case member 52, the first screwing portions 511x, 511y can be easily exposed from the second case member 52 toward the one side Z1 in the Z direction. Moreover, the first screwing portions 511x and 511y are fitted in the openings 521x and 521y to position the first case member 51 and the second case member 52 in the X direction and the Y direction. For this reason, the rotation detecting driven gear 70 that is rotatably supported directly by the first case member 51 and the second case member 52 can be supported in an appropriate posture.

  Further, in the electric opening and closing device 1 of the present embodiment, grease is applied to the gear used for the reduction gear train 4, but the rotation detecting unit 7 is connected to the large-diameter gear 411 of the first gear 41 adjacent to the outside in the radial direction. A partition wall 9 is provided between the rotation detector 7. For this reason, since it is difficult for grease to adhere to the rotation detection unit 7, it is possible to suppress occurrence of problems such as erroneous detection in the rotation detection unit 7 due to adhesion of grease.

  In particular, since the first gear 41 that meshes with the motor pinion 24 has a high rotational speed, grease is likely to be scattered due to centrifugal force. However, according to this embodiment, the grease is attached to the rotation detection unit 7 even in such a case. Can be suppressed. Further, since the rotation detection unit 7 and the large-diameter gear 411 of the first gear 41 are located in a space defined by the first case member 51 and the second case member 52, the grease scattered from the first gear 41 is used. However, according to the present embodiment, even in such a case, the partition wall 9 can suppress the adhesion of grease to the rotation detection unit 7. Further, the partition wall 9 is arranged on one side X1 and X direction from the facing region sandwiched between the large-diameter gear 411 (gear with gear adjacent to the rotation detecting unit 7) and the rotation detecting unit 7 of the first gear 41. It extends to the other side X2, and extends continuously to the inner surface (case inner wall) of the side plate portion 523 provided on both sides in the X direction. For this reason, it is possible to effectively suppress the grease from adhering to the rotation detection unit 7. Further, the partition wall 9 is arranged on one side X1 and X direction from the facing region sandwiched between the large-diameter gear 411 (gear with gear adjacent to the rotation detecting unit 7) and the rotation detecting unit 7 of the first gear 41. It extends to the other side X2, and extends continuously to the inner surface (case inner wall) of the side plate portion 523 provided on both sides in the X direction. For this reason, it is possible to effectively suppress the grease from adhering to the rotation detection unit 7.

  Moreover, since the partition wall 9 consists of the convex part formed in the surface facing the 1st case member 51 in the 2nd case member 52, there is an advantage that it is not necessary to add the member which comprises the partition wall 9 separately. is there. Here, the partition wall 9 may be configured by a convex portion formed on the surface of the first case member 51 facing the second case member 52. However, in this embodiment, the case body 5 has a structure in which the large-diameter gear 411 overlaps the circuit board 71 of the rotation detection unit 7 on one side Z1 in the Z-axis direction (second case member 52 side). Therefore, the partition wall 9 is preferably formed on the surface of the second case member 52 that faces the first case member 51.

  Further, since the rotation detection unit 7 is arranged at a position higher than the partition wall 9 and the large-diameter gear 411 (gear with gear) of the first gear 41 with respect to the direction of gravity, the grease is applied to the rotation detection unit 7 by its own weight. Adhesion can be prevented.

  In this embodiment, since the rotation detector 7 includes the potentiometer 72, if a large amount of grease adheres to the contact point of the potentiometer 72, it becomes a fatal problem, so the partition wall 9 is provided to suppress the adhesion of grease. The effect is remarkable.

(Other embodiments)
In the above embodiment, the first screws 171 and 172 are each configured to be stopped from a direction parallel to the rotation center axis L of the output member 3, but the first screws 171 and 172 are each configured to rotate the output member 3. Even in the case where the first attachment surface 550 orthogonal to the rotation center axis L is provided, the case body 5 can be fixed in an appropriate posture even when it is stopped from an oblique direction with respect to the center axis L. Similarly, even when the second screws 181 and 182 are each stopped from an oblique direction with respect to the rotation center axis L of the output member 3, a second mounting surface 560 orthogonal to the rotation center axis L can be provided. In this case, the case body 5 can be fixed in an appropriate posture.

  In the above embodiment, the first gear 41, the second gear 42, the third gear 43, and the fourth gear 44 are rotatably supported by the case body 5 via the support shaft. A configuration may be adopted in which some or all of the gears 41, 2, 42, 3, 43 and 44 are provided with a rotating shaft that is rotatably supported by the case body 5.

  In the above example, the electric opening / closing device 1 drives the toilet seat and the toilet lid. However, the electric opening / closing device 1 may be configured to drive the lid that opens and closes the laundry input port to the washing tub of the washing machine.

1 .. Electric opening and closing device 2 .. Motor 3.. Output member 4. Reduction gear train 5. Case body 7. Rotation detector 9. Partition wall 24. Motor pinion 41. · Second gear 43 · · third gear 44 · · fourth gear 51 · · first case member 52 · · second case member 53 · · third case member 70 · · rotation detection driven gear 72 · · potentiometer 171 , 172 .. First screw 181, 182 .. Second screw 411 .. Large diameter gear (gear with gear)
511x, 511y ··· first screwing portion 531x, 531y · · second screwing portion 537 · · stopper portion 550 · · first attachment surface 560 · · second attachment surface L · · rotation axis of output member

Claims (8)

A motor,
An output member to which rotation of the motor is transmitted;
A case body for holding the motor and the output member inside;
Have
In the case body, a plurality of first screwing portions for fixing the case body to a device are provided on one surface in the extending direction of the rotation center axis of the output member with respect to the rotation center axis. Provided on the first mounting surface orthogonal to each other,
The case body includes a first case member to which an output side end of the body of the motor is fixed, a second case member facing the first case member on the one side, and the first case member to the first case member A third case member facing the other side in the extending direction of the rotation center axis,
The output member is rotatably supported by the first case member,
The electric opening and closing device, wherein the first screwing portion is provided in the first case member.   2. The electric switchgear according to claim 1, wherein a surface of the one side of the plurality of first screwing portions forms a part of the first mounting surface. The plurality of first screwing portions includes two first screwing portions having different distances in the length direction of the case body perpendicular to the rotation center axis from the output member,
The distance between the two first screwing portions in the length direction is the length direction between the first screwing portion closer to the output member and the output member of the two first screwing portions. The electric switchgear according to claim 2, wherein the electric switchgear is longer than the distance at. The output member is rotatably supported by the first case member and the third case member,
In the case body, on the surface on the other side, a plurality of second screwing portions for fixing the case body to the device are provided on a second mounting surface orthogonal to the rotation center axis.
The electric switchgear according to any one of claims 1 to 3, wherein the second screwing portion is provided in the third case member.   The said 1st screwing part is comprised by the cylinder part which protruded toward the opening part of the said 2nd case member from the said 1st case member, The Claim 1 thru | or 4 characterized by the above-mentioned. The electric switchgear described. Inside the case body, a reduction gear train that decelerates the rotation of the motor and transmits it to the output member, a rotation detector that detects the rotational position of the output member, and a plurality of gears used for the reduction gear train A rotation detecting driven gear that meshes with any one of the gears and transmits the rotation of the gear to the rotation detecting unit;
The first case member or the third case member is provided with a stopper portion that defines a stop position of the output member,
The gear on the output side of the rotation detecting driven gear in the reduction gear train is supported rotatably on the first case member and the third case member directly or via a support shaft,
The electric switchgear according to any one of claims 1 to 5, wherein the rotation detection unit is disposed between the first case member and the second case member. Inside the case body, a reduction gear train that decelerates the rotation of the motor and transmits it to the output member, a rotation detector that detects the rotational position of the output member, and a plurality of gears used for the reduction gear train A rotation detecting driven gear that meshes with any one of the gears and transmits the rotation of the gear to the rotation detecting unit;
The first case member or the third case member is provided with a stopper portion that defines a stop position of the output member,
The gear on the output side of the rotation detecting driven gear in the reduction gear train is supported rotatably on the first case member and the third case member directly or via a support shaft,
The rotation detection unit is disposed between the first case member and the second case member,
The first screwing portion is configured by a cylindrical portion protruding from the first case member toward the opening of the second case member,
The first case member and the second case member are positioned by fitting the first screwing portion and the opening,
5. The rotation detection driven gear is rotatably supported by the first case member and the second case member directly or via a support shaft. 6. The electric switchgear according to 1.   The rotation detecting driven gear and the large-diameter gear of the first gear meshing with the motor pinion in the reduction gear train are disposed between the first case member and the second case member. The electric switchgear according to claim 6 or 7.

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