JP2018207750A - Geared motor and drain valve drive unit - Google Patents

Abstract

To provide a geared motor capable of suppressing the deformation of a case and a cover even when a motor case portion is sandwiched between the case and the cover to fix a motor to a housing.SOLUTION: In a geared motor 5, a part 48c to be sandwiched of a first projection portion 48 of a motor case 41 is sandwiched between a case 21 and a cover 22. A locking part 170 composed of a projection 137a of a first support part 137 of the cover 22 and a circular depression 107a of a first mounting part 107 of the case 21 is provided at a position adjacent to the part 48c to be sandwiched, and a first fastening part 161 for fixing the case 21 and the cover 22 using a bolt 8a is separated from the part 48c to be sandwiched to sandwich the locking part 170 therebetween. Consequently, a portion sandwiching the first projection portion 48 is prevented or restricted from being deformed in the case 21 and the cover 22 even when the bolt 8a is fastened by a strong force.SELECTED DRAWING: Figure 13

Description

  The present invention relates to a geared motor in which a motor case is sandwiched between two members constituting a housing to fix the motor. The present invention also relates to a drain valve driving device that drives a drain valve driving member connected to the drain valve by such a geared motor.

  A drain valve driving device for driving a drain valve of a washing machine is described in Patent Document 1. The drain valve driving device includes a drain valve driving member connected to the drain valve, and a geared motor that drives the drain valve driving member. The geared motor includes an annular stator, a rotor positioned inside the stator, a motor including a motor case, a gear train that transmits a driving force from the motor to an output gear, and the output gear, the motor, and the gear train. A housing for housing; The drain valve driving member is a wire, and a drain valve is connected to the tip of the wire. A pulley capable of winding a wire is coaxially attached to the output gear.

  The housing includes a case and a cover stacked in the axial direction of the output gear. The cover is integrally provided with a radial bearing member portion that rotatably supports the pulley. When the geared motor is driven, the pulley rotates and winds the wire. Thereby, the drain valve connected to the wire is driven.

  Here, the motor of the same document includes a projecting portion that projects in a direction perpendicular to the axis of the output gear to the outer peripheral side of the outer peripheral surface of the stator in the motor case. The protruding portion is provided with a notch having a circular arc shape when viewed from the axial direction at the tip edge. The case includes a mounting portion on which the protruding portion is mounted, and the cover includes a column portion that sandwiches the protruding portion mounted on the mounting portion between the mounting portion from the axial direction. The pillar portion is provided with a through hole penetrating in the stacking direction of the case and the cover, and the mounting portion is provided with a screw hole. The cover and the case are fastened by a bolt that passes through the through hole of the column portion and is screwed into the screw hole of the mounting portion. In a state where the cover and the case are fastened, the protruding portion of the motor case is sandwiched between the mounting portion of the case and the column portion of the cover. Thereby, the motor is fixed to the housing. The bolt passes inside the notch provided in the protruding portion.

Japanese Patent Laying-Open No. 2015-195637

  In Patent Document 1, the projecting portion (motor case portion) of the motor case sandwiched between the case and the cover does not have a through hole through which the bolt penetrates, and the bolt is placed inside the notch provided in the projecting portion. pass. Therefore, when the case and the cover are fixed by the bolt, the thickness of the protruding portion is between the mounting portion and the column portion at the outer peripheral side of the bolt and corresponding to the notched portion of the protruding portion. A gap is formed by that amount. Therefore, when the bolt tightening force is increased when the case and the cover are fixed, there is a problem that an uneven load is applied to the tip portion of the column portion and the tip of the column portion is easily crushed. Here, when a deformation such as a collapse of the pillar portion occurs in the cover, the cover approaches the case, and the gear wheel train housed in the housing interferes with the cover, which may hinder the operation of the gear wheel train. .

Further, when the cover is deformed, the attitude of the radial bearing member portion that is provided integrally with the cover changes. When the attitude of the radial bearing member changes, the attitude of the pulley supported by the radial bearing member changes, so the axis of the output gear to which the pulley is attached is also inclined. Here, when the axis of the output gear is inclined, there arises a problem that the meshing between the output gear and the final gear of the gear train becomes shallow. When the meshing between the output gear and the final gear becomes shallow, tooth skipping or the like occurs between them, which may cause a problem in winding the wire by the pulley and a problem in driving the drain valve.

  In view of these points, an object of the present invention is to provide a geared motor that can suppress deformation of the case and the cover even when the motor case portion is sandwiched between the case and the cover and the motor is fixed to the housing. It is in. Moreover, it is providing the drain valve drive device which drives a drain valve drive member with such a geared motor.

  Another object of the present invention is to provide a drain valve driving device that can prevent the meshing between the output gear and the final gear of the gear train even when the case or the cover is deformed.

  In order to solve the above problems, the present invention provides an annular stator, a rotor positioned inside the stator, a motor including a motor case, an output gear, and a driving force from the motor is transmitted to the output gear. And a housing that houses at least a part of the motor, the gear wheel train, and the output gear, and the housing is stacked on the case in the axial direction of the case and the output gear. A cover, wherein the motor case includes a motor case portion positioned radially outward from the outer peripheral surface of the stator, and the motor case portion is sandwiched between the case and the cover in the axial direction. A fastening portion for fastening the case and the cover is provided on an outer peripheral side of the sandwiched portion, and the fastening portion and the sandwiched portion are provided. Located in close to the clamped portion a between the said cover and the casing, characterized in that the locking portion for locking is provided.

  The geared motor of the present invention is to fix the motor to the housing by sandwiching the motor case part between the case and the cover. The clamped part sandwiched between the case and the cover in the motor case part is a bolt The fastening part for fixing the case and the cover by using, for example, and the locking part are sandwiched and separated. Therefore, even when the case and the cover are fastened and fixed with a strong force using a bolt or the like in the fastening portion, it is possible to prevent or suppress the portion of the case or the cover that sandwiches the motor case portion from being deformed. On the other hand, a locking part for locking the case and the cover is provided at a position between the fastening part and the clamping part and close to the clamping part. Therefore, it is possible to prevent the position of the case and the cover from being shifted in the portion where the motor case portion is sandwiched. Therefore, the motor case portion can be securely sandwiched between the case and the cover.

  In the present invention, it is preferable that the case or the cover includes a rotation preventing portion that contacts the motor case portion from the circumferential direction. If it does in this way, it can prevent that the attitude | position of the motor accommodated in the housing will be displaced to the surroundings of the rotating shaft. Further, if such a detent portion is provided, the motor (motor case) is positioned in the axial direction by the case and the cover, while the motor (motor case) is brought into contact with the motor case portion and the detent portion. The posture around the rotation axis can be defined.

  In the present invention, in the fastening portion, in order to fasten the case and the cover using bolts, the fastening portion includes a through hole that penetrates the cover in the axial direction, and a coaxial with the through hole in the case. Preferably, the cover and the case are fixed by a bolt that penetrates the through hole from the opposite side of the case and is screwed into the screw hole.

  In the present invention, in order to lock the case and the cover at the locking portion, the locking portion is provided on one of the case and the cover and protrudes to the other side, and a locking projection. A locking recess provided in the other of the case and the cover and into which the locking projection is inserted.

  In the present invention, the motor case part is provided with an arc-shaped notch when viewed from the axial direction, and the locking projection passes through the inside of the notch, The said clamping part shall be an edge part of the said notch part in the said motor case part. If it does in this way, the position of a motor case can be prescribed | regulated in the direction which cross | intersects an axis line, when the convex part for latching passes the notch provided in the motor case part. Moreover, if it does in this way, a to-be-clamped part and a latching | locking part can be provided in the adjacent position.

  In the present invention, the cover includes a column portion extending in the axial direction toward the case, and the case includes a mounting surface that faces the cover and on which the motor case portion is mounted. One of the locking convex portion and the locking concave portion is provided on the front end surface of the column portion on the case side, and the other is provided on the mounting surface, and the nipped The portion may be sandwiched between the tip surface of the column portion and the mounting surface. In this way, it is easy to sandwich the motor case portion between the case and the cover, and make the sandwiched portion and the locking portion adjacent to each other.

  In the present invention, the cover is made of resin, the locking convex portion is provided on a front end surface of the column portion on the case side, and the locking concave portion is formed on the mounting surface. It is desirable that the column portion is provided with a recess extending in the axial direction from an end surface opposite to the case. If it does in this way, it can prevent that a pillar part becomes excessively thick by the recessed part provided in the pillar part. Therefore, it is easy to mold a resin cover.

  Next, a drain valve driving device of the present invention includes the above geared motor, a wire connected to an external drain valve, and a pulley capable of winding the wire, and the pulley is connected to the output gear. It is characterized by being connected coaxially.

  The drain valve driving device of the present invention can wind the wire connected to the valve body by rotating the pulley by driving the geared motor. Therefore, the drain valve connected to the wire can be driven.

  In the present invention, it is desirable that the cover includes a cover main body member having an opening, and a radial bearing member that is attached to the opening and supports the pulley rotatably from a radial direction.

If the cover main body member and the radial bearing member are separately provided, even when the cover main body member is deformed, the attitude of the radial bearing member supporting the pulley can be maintained. Thereby, since it can prevent or suppress that the axis line of the output gear to which the pulley is coaxially connected can be prevented, the meshing between the output gear and the final gear of the gear train can be prevented or suppressed. As a result, it is possible to prevent or suppress the occurrence of tooth skipping between the output gear and the final gear, thereby preventing a problem in winding the wire by the pulley and a problem in driving the drain valve. Can be suppressed. Further, if the cover main body member and the radial bearing member are separated, the cover main body member and the radial bearing member can be formed from different materials. Therefore, for example, the radial bearing member can be formed from a highly slidable material while the cover body member is formed from a highly rigid material and the deformation thereof is suppressed. In addition, the radial bearing member can be formed from a material with low wear resistance, and the occurrence of wear on the pulley that slides on the radial bearing member can be suppressed.

  In the present invention, the radial bearing member includes a bearing tube portion inserted into the opening, and an annular shape that extends from the bearing tube portion to the outer peripheral side and contacts an opening edge portion on the case side of the opening in the cover. It is desirable that the inner peripheral surface of the bearing tube portion is a sliding surface on which the pulley slides. In this way, it is easy to attach the radial bearing member to the opening of the cover body member.

  In the present invention, the opening includes a circular opening and a notch opening that extends from a portion in the circumferential direction of the circular opening to the outer periphery, and the radial bearing member protrudes from the bearing tube to the outer periphery. It is desirable to provide a protrusion that fits into the notch opening. If it does in this way, it can prevent that the radial bearing member with which the cover main body member was mounted | worn rotates with a pulley.

  In the present invention, it is desirable that the cover main body member is formed of a material having higher rigidity than the radial bearing member. In this way, deformation of the cover body member can be suppressed.

  In the present invention, the output gear includes a gear portion that meshes with a final gear of the gear train, and an output shaft portion that is coaxial with the gear portion, and the gear portion is housed in the housing, and the output gear The shaft is located inside the opening, and the pulley is wound around the wire on the opposite side of the cover from the case, and the opening extends coaxially from the winding. It is preferable that the output shaft portion is inserted inside the connection portion, and the radial bearing member supports the connection portion from the outer peripheral side. In this way, the pulley connected to the output gear can be supported by the radial bearing member.

  In the present invention, the bearing tube portion includes a step portion in which an inner peripheral side protrudes toward the pulley side rather than an outer peripheral side at a position in the radial direction of the end surface on the pulley side, and the pulley It is preferable that an annular groove for receiving the stepped portion is provided around the connecting portion on the end face of the portion on the radial bearing member side. In this way, the length dimension of the sliding surface of the radial bearing member in the axial direction can be secured while suppressing an increase in the dimension of the apparatus in the axial direction.

  In the present invention, the pulley includes, on an end surface of the winding portion on the radial bearing member side, an annular convex portion that protrudes toward the radial bearing member along an outer peripheral side edge of the annular groove, When the pulley is inclined with respect to the radial bearing member, the annular convex portion is preferably in contact with the end surface portion on the outer peripheral side of the stepped portion on the end surface on the pulley side of the radial bearing member. If it does in this way, the inclination range of a pulley can be controlled by contact | abutting with the annular convex part provided in the pulley, and the radial bearing member.

  According to the geared motor of the present invention, even when the motor case portion is sandwiched between the case and the cover and the motor is fixed to the housing, the portion of the case or cover that sandwiches the motor case portion can be prevented from being deformed. . Further, it is possible to prevent the position of the case and the cover from being shifted in a portion where the motor case portion is sandwiched.

  Further, according to the drain valve driving device of the present invention, it is possible to suppress the deformation of the housing in the geared motor.

Furthermore, according to the drain valve driving device of the present invention, since the pulley is rotatably supported by the radial bearing member attached to the case main body portion, the radial bearing member for supporting the pulley even when the case main body portion is deformed. The posture can be maintained. Thereby, since it can prevent or suppress that the axis line of the output gear to which the pulley is coaxially connected can be prevented, the meshing between the output gear and the final gear can be prevented or suppressed. Therefore, it is possible to prevent or suppress the occurrence of a malfunction in the winding of the wire by the pulley and the malfunction in the drain valve drive. Further, the cover body member and the radial bearing member can be formed from different materials.

It is a perspective view of the drain valve drive device to which the present invention is applied. It is a perspective view of the drain valve drive device of the state where a bracket was removed. It is a disassembled perspective view of the drain valve drive device of the state where a bracket was removed. It is a perspective view of a pulley. It is a top view of the drain valve drive device which removed the cover, the pulley, and the wire. It is explanatory drawing of a motor and a gear wheel train. It is a perspective view of a motor. It is a wheel train development view showing the section which connects the axis of the gear of a gear train wheel. It is a perspective view at the time of seeing a case from the cover side. It is a perspective view of a cover. It is a disassembled perspective view at the time of seeing a cover from the opposite side to a case. It is a disassembled perspective view at the time of seeing a cover from the case side. It is sectional drawing of the drain valve drive apparatus in the AA line of FIG. It is a fragmentary sectional view of the drain valve drive device in the BB line of FIG. It is explanatory drawing of a motor, a gear wheel train, and a clutch switching lever.

  Hereinafter, a drain valve driving device according to an embodiment of the present invention will be described with reference to the drawings.

  FIG. 1 is a perspective view of a drain valve driving device to which the present invention is applied. FIG. 2 is a perspective view of the drain valve driving device with the bracket removed. FIG. 3 is an exploded perspective view of the drain valve driving device with the bracket omitted. FIG. 4 is a perspective view of the pulley. FIG. 5 is a plan view of the drain valve driving device with the cover, frame and pulley removed. The drain valve driving device 1 is fixed to an attachment portion provided in the washing machine and drives a drain valve included in the washing machine.

  As shown in FIG. 2, the drain valve driving device 1 includes a wire 3 connected to a drain valve (not shown), a pulley 4 to which one end of the wire 3 is fixed, and the pulley 4 is rotated to wind the wire 3. And a geared motor 5 that performs feeding. The geared motor 5 includes a housing 6 that rotatably supports the pulley 4. The housing 6 includes a case 21 and a cover 22 stacked on the case 21. The stacking direction of the case 21 and the cover 22 is the axis (rotation center line) direction of the pulley 4. As shown in FIG. 3, the cover 22 includes a cover main body member 23 and a radial bearing member 24 attached to an opening 23 a provided in the cover main body member 23. The pulley 4 is rotatably supported by the radial bearing member 24. As shown in FIG. 1, a bracket 7 is attached to the housing 6 so as to cover the pulley 4 from the side opposite to the cover 22. The bracket 7 is a fastening member for fixing the drain valve driving device 1 to the attachment portion.

Here, as shown in FIG. 3, the drain valve driving device 1 includes two bolts 8 a and 8 b for fixing the bracket 7, the case 21, and the cover 22. Further, the drain valve driving device 1 includes one bolt 8 c for fixing the case 21 and the cover 22. Further, the drain valve driving device 1 includes two bolts 8d and 8e for fixing the bracket 7 and the cover 22.
Is provided.

  In this specification, the direction in which the wire 3 is pulled out from the pulley 4 is defined as an X-axis direction, and two directions orthogonal to the X-axis direction are defined as a Y-axis direction and a Z-axis direction. The Y-axis direction and the Z-axis direction are orthogonal to each other. The + X direction is a direction in which the wire 3 is pulled out, and the −X direction is a direction in which the wire 3 is wound up. The Z-axis direction is a stacking direction of the case 21 and the cover 22. The side where the cover 22 is located is the + Z direction, and the side where the case 21 is located is the -Z direction. Further, one side in the Y-axis direction is defined as + Y direction, and the other side is defined as -Y direction.

  As shown in FIG. 3, the geared motor 5 includes a motor 40, an output gear 31, and a gear train 32 for transmitting the rotation of the motor 40 to the output gear 31. The output gear 31 includes a gear portion 35 that meshes with a reduction gear 53 that is the final gear of the gear train 32, and an output shaft portion 36 (serration portion) that is coaxial with the gear portion 35. The motor 40, the gear portion 35 of the output gear 31, and the gear wheel train 32 are accommodated in the housing 6. The output shaft portion 36 of the output gear 31 is located inside the opening 23 a of the cover 22.

  As shown in FIG. 4, the pulley 4 includes a winding portion 11 around which the wire 3 is wound, and a cylindrical connection portion 12 that extends coaxially from the winding portion 11 toward the cover 22. The outer diameter dimension of the connection part 12 is shorter than the outer diameter dimension of the winding part 11. The winding part 11 is provided with a fastening part 11 a for fixing the end part of the wire 3. Moreover, the winding part 11 is provided with the convex part 11b which protrudes from a part to the outer peripheral side in the circumferential direction. An output gear 31 of the geared motor 5 is coaxially connected to the connecting portion 12. That is, the connecting portion 12 is inserted into the opening 23a of the cover 22 from the + Z direction, and the output shaft portion 36 of the output gear 31 is inserted into the center hole. The connection part 12 of the pulley 4 is supported from the outer peripheral side (from the radial direction) by the radial bearing member 24.

  Here, as shown in FIG. 4B, an annular groove 13 is provided at a position adjacent to the connection portion 12 on the end surface in the −Z direction (end surface on the cover 22 side) of the winding portion 11. . An annular protrusion 14 is provided on the end surface in the −Z direction of the winding portion 11 along the outer peripheral edge of the annular groove 13. The pulley 4 is formed from a resin that does not contain crow fibers. In this example, the pulley 4 is made of POM (polyacetal).

  The drain valve driving device 1 keeps the pulley 4 in the winding position by continuing energization of the motor 40 that is a driving source while the wire 3 connected to the drain valve is wound around the pulley 4 by a predetermined amount. To do. Thereby, the valve body of the drain valve is held at a position away from the drain port. Further, the drain valve driving device 1 stops energization of the motor 40 and releases the holding state of the pulley 4. Thereby, the wire 3 can be pulled out by an external force. For example, when the wire 3 is pulled out by an urging force such as a spring force connected to the valve body of the drain valve, the drain port is closed by the valve body.

(motor)
FIG. 5 is a plan view of the drain valve driving device 1 with the cover 22, the pulley 4 and the wire 3 removed. FIG. 6 is a perspective view of the motor 40, the gear train 32, and the output gear 31. FIG. 7 is a perspective view of the motor 40. FIG. 8 is a development view of the train wheel in the CC line of FIG. 5 showing a cross section connecting the gear shafts of the gear train wheel 32. 6 to 8, the gear shafts of the gear train 32 are denoted by reference symbols D, E, F, G, and H. A rotation center axis of the motor 40 is indicated by O.

As shown in FIGS. 6 and 7, the motor 40 has a motor case 41. The motor case 41 includes a cup-shaped motor case main body 41a and a plate 41b attached to the end of the motor case main body 41a on the + Z direction side. As shown in FIG. 8, the motor 40 includes a bobbin 43 disposed inside the motor case body 41 a, a stator coil 44 wound around the bobbin 43, and a rotor disposed on the inner peripheral side of the bobbin 43. 45. Rotor 4
The rotation center axis 5 is the O axis. As shown in FIG. 7, the plate 41b is formed with a through hole 41c in which the rotor 45 is disposed. The plate 41b is provided with a bearing 41d for the output gear 31. Further, the plate 41b is provided with a fixed shaft support portion 41e into which the end portion in the −Z direction of the fixed shaft that rotatably supports the gears constituting the gear wheel train 32 is press-fitted. The + Z direction end of the fixed shaft is fixed to the cover 22 by press fitting or the like. Each fixed shaft extends in the Z-axis direction.

  As shown in FIG. 8, the rotor 45 includes a substantially cylindrical magnet 451 and a shaft portion 452 disposed on the inner peripheral side of the magnet 451. The rotor 45 is formed by insert-molding a magnet 451 made of a ferrite magnet or the like at the end of the shaft portion 452 in the −Z direction. An induction rotating body 46 is disposed between the magnet 451 and the shaft portion 452. The induction rotating body 46 is formed by insert-molding an induction ring made of a nonmagnetic metal such as aluminum or copper on a shaft portion that is a resin member. When the motor 40 is driven and the rotor 45 rotates, an eddy current is generated between the magnet 451 and the induction ring of the induction rotator 46, and a magnetic flux is generated by the eddy current to cause the induction rotator 46 to rotate relative to the magnet 451. An impeding braking force is generated. The induction rotating body 46 and the rotor 45 are coupled so as to rotate together by this braking force (braking force due to eddy current).

  The upper end portion of the induction rotating body 46 protrudes toward the + Z direction side of the magnet 451, and the rotor gear 47 is formed on the outer peripheral surface of the protruding portion. The rotor gear 47 is a gear that transmits the rotation of the rotor 45 to the second clutch mechanism 80, as will be described later. A fixed shaft 453 that rotatably supports the rotor 45 is disposed at the center of the rotor 45.

  Here, the motor case main body 41a and the plate 41b constituting the motor case 41 are made of magnetic plates. The plate 41b is formed with pole teeth that bend and extend in the −Z direction from the edge of the through hole 41c in which the rotor 45 is disposed. The motor case body 41a has pole teeth formed by cutting and raising the bottom of the motor case body 41a and bending it in the + Z direction. The pole teeth provided on the plate 41b and the pole teeth cut and raised from the motor case body 41a are alternately arranged in the circumferential direction and face the outer peripheral surface of the magnet 451 in the radial direction. That is, the motor case main body 41a and the plate 41b also serve as a stator core.

  Further, as shown in FIG. 7, the plate 41 b includes a first protruding portion 48 (motor case portion) and a second protruding portion 49 that protrude from the motor case main body 41 a to the outer peripheral side. The first projecting portion 48 and the second projecting portion 49 are both flat and project on both sides with the motor case body 41a interposed therebetween. The first protruding portion 48 protrudes in the intermediate direction between the + X direction and the + Y direction, and the second protruding portion 49 protrudes in the intermediate direction between the −X direction and the −Y direction. The first projecting portion 48 includes a notch 48a having an arc shape when viewed from the Z-axis direction at the tip edge. Moreover, the 1st protrusion part 48 is provided with the through-hole 48b inside the notch part 48a (side near the motor case main body 41a). The second projecting portion 49 is provided with a bolt through hole 49a through which a bolt for fixing the case 21 and the cover 22 passes.

(Gear train)
As shown in FIG. 6, the gear wheel train 32 includes a transmission wheel train 50 that transmits the rotation of the motor 40 to the output gear 31, and a first clutch that interrupts transmission of rotational torque from the motor 40 to the transmission wheel train 50. A mechanism 60, a rotation restricting mechanism 70 that restricts rotation of the transmission wheel train 50 when an external load is applied to the wire 3 and holds the pulley 4 in a non-rotatable state, and a state in which the transmission wheel train 50 transmits rotational torque. A second clutch mechanism 80 that switches between a state in which transmission is not performed is provided. Details of the gear train 32 and details of the operation of the drain valve driving device 1 will be described later.

(Case)
9A is a perspective view when the case 21 is viewed from the side where the cover 22 is covered, and FIG. 9B is a perspective view when the case 21 is viewed from the side opposite to the side where the cover 22 is covered. FIG. The case 21 is made of resin. As shown in FIG. 9A, the case 21 has a rectangular shape as a whole when viewed from the Z-axis direction with the longitudinal direction directed in the X-axis direction. As shown in FIG. 5, the case 21 includes a terminal accommodating portion 100 for accommodating the terminal of the motor 40 in the intermediate direction between the −X direction and the + Y direction.

  The case 21 includes a case side frame 101 that surrounds the motor 40, the gear train 32, and the output gear 31 from the outer peripheral side that surrounds the outer side in the radial direction orthogonal to the axis C of the output gear 31. The shape of the case side frame 101 when viewed from the Z-axis direction corresponds to the planar shape of the case 21. As shown in FIG. 9, the case side frame 101 has a first corner 101a bent in a direction orthogonal to the intermediate direction between the + X direction and the + Y axis direction, and an intermediate direction between the + X direction and the −Y direction. The second corner portion 101b bent in the orthogonal direction, the third corner portion 101c bent in the intermediate direction between the −X direction and the −Y direction, and the terminal accommodating portion 100 in the intermediate direction between the −X direction and the + Y direction. A projecting frame portion 101d is provided. Further, the case 21 includes an annular portion 102 that extends inward from an end edge in the −Z direction of the case side frame portion 101, a cylindrical portion 103 that extends in an −Z direction from an edge on the inner peripheral side of the annular portion 102, and a cylinder And a circular plate portion 104 that closes an edge in the −Z direction of the shape portion 103. The cylindrical portion 103 and the circular plate portion 104 define a motor accommodating portion 90 that accommodates the motor 40 on the inner peripheral side. The output gear 31 and the gear train 32 are configured on the + Z direction side of the motor 40 accommodated in the motor accommodating portion 90.

  The case 21 includes a first pillar portion 106 inside the first corner portion 101 a of the case side frame portion 101. The first column portion 106 extends from the annular portion 102 in the + Z direction. A case-side first screw hole 106 a is provided at the center of the first column portion 106. Further, the case 21 has a first mounting portion on which the first projecting portion 48 (motor case portion) of the motor case 41 is mounted on the opposite side of the annular portion 102 to the case side frame portion 101 of the first column portion 106. 107. The shape when the end surface (mounting surface) in the + Z direction of the first mounting unit 107 is viewed from the Z-axis direction is substantially circular. A circular recess 107a (locking recess) is formed in the center of the first mounting portion 107 (mounting surface). Here, as shown in FIG. 9B, the case 21 includes a protrusion 108 that is coaxial with the first mounting portion 107 and extends in the −Z direction from the annular portion 102, and the circular recess 107 a The protrusion 108 is reached through the mounting portion 107 and the annular portion 102. The case 21 includes a locking column portion 109 that protrudes in the + Z direction on the inner peripheral side of the first placement portion 107 in the annular portion 102. The locking column 109 has a protrusion 109a on the tip surface. Further, the case 21 has a pair of rotation-preventing protrusions 91 (rotations) on both sides of the annular portion 102 on the inner peripheral side with the locking column portion 109 and the first mounting portion 107 interposed therebetween in the circumferential direction. A stopper).

  As shown in FIG. 9A, the case 21 includes a second pillar portion 111 inside the second corner portion 101 b of the case side frame portion 101. The second column part 111 extends from the annular part 102 in the + Z direction. A case-side second screw hole 111 a is provided at the center of the second column part 111.

  Further, the case 21 includes a second placement portion 113 for placing the second projecting portion 49 between the third corner portion 101 c and the tubular portion 103 in the case side frame portion 101. When the end surface in the + Z direction of the second placement portion 113 is viewed from the Z-axis direction, the shape is circular, and a case-side third screw hole 113a is provided in the center. Here, as shown in FIG. 9B, the case 21 is provided with a protrusion 114 that is coaxial with the second mounting portion 113 and extends in the −Z direction from the annular portion 102, and the case-side third screw hole 113a. Passes through the second mounting portion 117 and the annular portion 102 and reaches the protrusion 114. Further, the case 21 includes a pair of anti-rotation protrusions 92 (anti-rotation portions) on both sides of the annular portion 102 on the inner peripheral side with the second mounting portion 113 interposed therebetween in the circumferential direction.

  Further, the case 21 includes a stepped portion 116 at the midpoint position in the Z-axis direction on the outer peripheral surface of the case-side frame portion 101 so that the −Z-direction side (side away from the cover 22) spreads outward. The step portion 116 includes an end surface 116a facing the + Z direction (the cover 22 side).

(cover)
FIG. 10A is a perspective view when the cover 22 is viewed from the side opposite to the case 21, and FIG. 10B is a perspective view when the cover 22 is viewed from the case 21 side. FIG. 11 is an exploded perspective view when the cover 22 is viewed from the side opposite to the case 21. FIG. 12 is an exploded perspective view of the cover 22 as viewed from the case 21 side. As shown in FIGS. 10 to 12, the cover 22 includes a cover body member 23 and a radial bearing member 24. The cover main body member 23 is formed from a resin containing glass fibers. In this example, the cover main body member 23 is made of PBT (polybutylene terephthalate) containing glass fiber. The radial bearing member 24 is made of a resin that does not contain crow fibers. In this example, the radial bearing member 24 is made of PBT that does not contain crow fibers. The rigidity of the cover body member 23 is higher than the rigidity of the radial bearing member 24. Further, the wear resistance of the cover main body member 23 is higher than that of the radial bearing member 24.

  As shown in FIG. 11, the cover main body member 23 includes a ceiling plate 121 that extends in the X-axis direction and the Y-axis direction, and a cover-side frame 122 that extends in the −Z direction from the outer periphery of the ceiling plate 121. The contour shape when the cover side frame portion 122 is viewed from the Z-axis direction corresponds to the contour shape of the case side frame portion 101. Accordingly, the cover-side frame portion 122 is bent in a direction orthogonal to the first corner portion 122a bent in a direction orthogonal to the intermediate direction between the + X direction and the + Y axis direction, and in a direction orthogonal to the intermediate direction between the + X direction and the −Y direction. A second corner portion 122b, a third corner portion 122c bent in a middle direction between the −X direction and the −Y direction, and a projecting frame portion 122d projecting in a middle direction between the −X direction and the + Y direction.

  As shown in FIG. 12, the cover-side frame portion 122 includes a stepped portion 123 that extends inward on the + Z direction side (side away from the case 21) in the middle of the inner peripheral surface in the Z-axis direction. . The step portion 123 includes an end surface 123a facing the case 21 side (−Z direction).

  As shown in FIG. 10 (a), the ceiling plate portion 121 includes an arc-shaped rib 125 at a position close to the second corner portion 122b of the outer side surface (the surface facing the + Z direction). The opening 23 a of the cover main body member 23 is provided at the center of the arc-shaped rib 125. As shown in FIG. 2, the pulley 4 is inserted into the arc-shaped rib 125 from the + Z direction. The arc-shaped rib 125 faces the release side in the + X direction. The wire 3 is pulled out in the + X direction from the pulley 4 through the open end of the arc-shaped rib 125. A concave portion 125 a is formed on the inner peripheral surface of the arc-shaped rib 125 over a predetermined angular range. 11a formed in the outer peripheral surface of the pulley 4 is arrange | positioned at the recessed part 125a. The angular range in which the pulley 4 rotates is regulated by the concave portion 125a and the convex portion 11b.

  Moreover, as shown in FIG. 11, the 1st boss | hub 127 is provided in the inner side of the 1st corner | angular part 122a, and the inner side of the 2nd corner | angular part 122b is shown in the outer surface (surface which faces + Z direction) of the ceiling board part 121. A second boss 128 is provided, and a third boss 129 is provided inside the third corner 122c. Furthermore, a fourth boss 130 is provided between the second boss 128 and the third boss 129 in the X-axis direction on the outer side surface (the surface facing the + Z direction) of the ceiling plate portion 121. The fifth boss 131 is provided in the + Y direction. The first boss 127, the second boss 128, the fourth boss 130, and the fifth boss 131 surround the arc-shaped rib 125. A bracket fixing screw hole 130 a is provided at the center of the fourth boss 130. A bracket fixing screw hole 131 a is provided at the center of the fifth boss 131.

  As shown in FIGS. 10B and 12, the cover main body member 23 includes a first tube portion 135 inside the first corner portion 122 a of the cover side frame portion 122. The first tube portion 135 protrudes in the −Z direction from the ceiling plate portion 121 coaxially with the first boss 127. Here, the cover body member 23 includes a cover-side first fixing hole 136 that penetrates the first boss 127, the ceiling plate portion 121, and the first tube portion 135 in the Z-axis direction. Further, the cover body member 23 includes a first support column 137 extending from the ceiling plate 121 in the −Z direction on the opposite side of the ceiling plate 121 from the first corner portion 122a of the first tube portion 135. The first support column 137 is formed at a position facing the first placement unit 107 of the case 21 when the case 21 and the cover 22 are stacked.

  The first support column 137 includes a large-diameter portion 138 from the ceiling plate 121 toward the tip, and a small-diameter portion 139 that is coaxial with the large-diameter portion 138 and has an outer diameter shorter than that of the large-diameter portion 138. The planar shape when the small diameter portion 139 of the first support column 137 is viewed from the Z-axis direction is a D-shape. That is, when the small diameter portion 139 of the first support column 137 is viewed from the Z-axis direction, the contour (the contour of the distal end surface of the small diameter portion 139) is an arc connecting both ends of the linear contour portion 139a and the linear contour portion 139a. And a shape contour portion 139b. The linear contour portion 139a is located on the side opposite to the cover side frame portion 122. A columnar convex portion 137a (locking convex portion) is provided on the distal end surface of the first support column portion 137. When the case 21 and the cover 22 are stacked, the convex portion 137 a is locked to the circular concave portion 107 a of the first placement portion 107 of the case 21. That is, the convex portion 137 a of the first support column portion 137 of the cover 22 and the circular concave portion 107 a of the first placement portion 107 of the case 21 constitute an engaging portion 170. Here, as shown in FIG. 10A and FIG. 11, the first support column part 137 has a recess 137b that penetrates from the ceiling plate part 121 side through the large diameter part 138 to the tip side of the small diameter part 139. Prepare.

  Furthermore, as shown in FIG. 12, the cover main body member 23 includes a locking cylinder portion 140 that protrudes in the −Z direction from the ceiling plate portion 121 on the opposite side of the first column portion 137 from the first cylinder portion 135. . The protruding dimension of the locking cylinder part 140 from the ceiling plate part 121 is shorter than the protruding dimension of the first cylinder part 135. When the case 21 and the cover 22 are stacked, the locking cylinder 140 abuts the front end surface of the locking column 109 and the protrusion 109a of the locking column 109 is inserted into the center hole 140a. Is done.

  Further, the cover body member 23 includes a second cylinder portion 141 inside the second corner portion 122b of the cover side frame portion 122. The second cylinder portion 141 projects in the −Z direction from the ceiling plate portion 121 coaxially with the second boss 128. Here, the cover main body member 23 includes a cover-side second fixing hole 142 that penetrates the second boss 128, the ceiling plate portion 121, and the second tube portion 141 in the Z-axis direction.

  Further, the cover main body member 23 includes a second support column 145 on the inner peripheral side of the third corner 122c of the ceiling plate 121. The second support column 145 protrudes from the ceiling plate 121 in the −Z direction coaxially with the third boss 129. The second support column 145 includes a large-diameter portion 146 from the ceiling plate portion 121 toward the tip, and a small-diameter portion 147 that is coaxial with the large-diameter portion 146 and shorter in diameter than the large-diameter portion 146. The planar shape when the small diameter portion 147 of the second support column 145 is viewed from the Z-axis direction is a D-shape. That is, when the small diameter portion 147 of the second support column 145 is viewed from the Z-axis direction, the contour (the contour of the tip surface of the small diameter portion 147) is an arc connecting the both ends of the linear contour portion 147a and the linear contour portion 147a. And a shape contour portion 147b. The linear contour portion 147 a is located on the side opposite to the cover side frame portion 122. Here, the cover body member 23 includes a cover-side third fixing hole 148 that passes through the third boss 129, the ceiling plate part 121, and the second column part 145 in the Z-axis direction.

As shown in FIG. 11 and FIG. 12, the opening 23a provided in the ceiling plate portion 121 includes a circular opening portion 23b and a pair of notch opening portions extending from two circumferential positions of the circular opening portion 23b to the outer peripheral side. 23c. Each notch opening portion 23c is rectangular, and extends in the radial direction of the circular opening portion 23b on both sides of the circular opening portion 23b. As shown in FIG. 12, a circular recess 151 is formed on the inner side surface (end surface in the −Z direction) of the ceiling plate portion 121 coaxially with the circular opening portion 23b. The circular opening 23b and the cutout opening 23c open on the bottom surface of the circular recess 151. Further, on the inner side surface of the ceiling plate portion 121, an annular convex portion 152 that protrudes toward the case 21 along the outer peripheral edge of the circular concave portion 151 is provided.

  Next, as shown in FIGS. 11 and 12, the radial bearing member 24 includes a bearing tube portion 155, an annular flange portion 156 that extends from the midway position in the Z-axis direction of the bearing tube portion 155 to the outer peripheral side, and a bearing tube portion. The protrusion part 157 which protrudes a radial direction outside from two places of the circumferential direction of the outer peripheral surface of 155 is provided. The protruding portion 157 is located on the + Z direction side of the annular flange portion 156, and the end portion of the protruding portion 157 in the −Z direction is continuous with the annular flange portion 156. Furthermore, as shown in FIG. 11, the radial bearing member 24 protrudes in the + Z direction (the pulley 4 side) from the outer peripheral side to the inner peripheral side at a midway position in the radial direction of the end surface in the + Z direction of the bearing tube portion 155. An annular step 158 is provided.

  Here, as shown in FIG. 10, in the radial bearing member 24, the bearing tube portion 155 is inserted into the circular opening portion 23b from the -Z direction, and the protruding portion 157 is inserted into the notch opening portion 23c from the -Z direction. The cover body member 23 is attached. In a state where the radial bearing member 24 is attached to the cover body member 23, the annular flange portion 156 is fitted into the circular recess 151. Further, the annular flange portion 156 contacts the bottom surface of the circular recess 151 (the opening edge portion of the opening portion 23a in the cover main body member 23).

(Assembly of drain valve drive device)
Next, assembly of the drain valve driving device 1 will be described. 13 is a cross-sectional view of the drain valve driving device taken along line AA in FIG. FIG. 14 is a partial cross-sectional view of the drain valve driving device taken along line BB in FIG.

  When assembling the drain valve driving device 1, first, as shown in FIG. 3, the motor 40, the gear wheel train 32, and the output gear 31 are housed inside the case 21. At this time, as shown in FIG. 13, the motor 40 accommodates a portion of the motor case body 41 a on the −Z direction side in the motor accommodating portion 90. Further, the first projecting portion 48 of the motor case 41 (plate 41b) is inserted between the pair of anti-rotation protrusions 91 located inside the first corner portion 101a and placed on the first placement portion 107. The The locking column 109 passes through the through hole 48 b of the first projecting portion 48. Further, the second projecting portion 49 of the motor case 41 of the motor 40 is inserted between the pair of anti-rotation protrusions 92 located on the inner side of the third corner portion 101 c and placed on the second placement portion 113. In parallel with this, the radial bearing member 24 is attached to the opening 23a of the cover main body member 23, and the cover 22 is configured as shown in FIG.

  Here, in a state where the rotation preventing projection 91 is placed on the first placement portion 107 and the second protruding portion 49 is placed on the second placement portion 113, the pair of rotation preventing projections 91 are the first protruding portions. 48 is contacted from the circumferential direction, and the pair of anti-rotation protrusions 92 are contacted to the second projecting portion 49 from the circumferential direction. As a result, the attitude of the motor 40 is restricted from rotating (displaced) around the O axis in the motor housing 90. Further, the pair of anti-rotation protrusions 91 and the pair of anti-rotation protrusions 92 abut on the outer peripheral surface of the motor case main body 41a protruding from the motor housing portion 90 in the + Z direction. Thereby, the motor 40 is restricted from moving in the radial direction around the O-axis. That is, in this example, the motor 40 (motor case 41) is positioned in the O-axis direction by sandwiching the case 21 and the cover 22, while the motor 40 is brought into contact with the motor case 41 and the non-rotating protrusions 91 and 92. The attitude and radial position of the (motor case 41) around the O axis can be defined.

Thereafter, the cover 22 is laminated on the case 21 while the output shaft portion 36 of the output gear 31 is positioned in the center hole of the bearing tube portion 155 of the radial bearing member 24. That is, as shown in FIG. 13, the tip portion of the case side frame portion 101 is inserted inside the tip end portion of the cover side frame portion 122. As a result, the tip of the case side frame 101 faces the end surface 123a of the step 123 of the cover side frame 122 with a narrow gap, and the tip of the cover side frame 122 faces the step 116 of the case side frame 101. It faces the end face 116a with a narrow gap. In a state where the case 21 and the cover 22 are laminated, the cover side frame portion 122 and the case side frame portion 101 are fitted in a so-called inlay state.

  When the cover 22 is stacked on the case 21, as shown in FIG. 2, the cover-side first fixing hole 136 and the case-side first screw hole 106 a communicate with each other to form a first fastening portion 161. Further, the cover-side second fixing hole 142 and the case-side second screw hole 111a communicate with each other to form a second fastening portion 162. Further, the cover side third fixing hole 148, the bolt through hole 49a of the second projecting portion 49 of the motor case 41, and the case side third screw hole 113a communicate with each other to form a third fastening portion 163. Further, when the cover 22 is laminated on the case 21, as shown in FIG. 13, the first protruding portion 48 of the motor case 41 is interposed between the first mounting portion 107 of the case 21 and the first support column 137 of the cover 22. The second projecting portion 49 of the motor case 41 is sandwiched between the second placement portion 113 of the case 21 and the second support column portion 145 of the cover 22. In the first protruding portion 48, the sandwiched portion 48 c that is sandwiched between the first placement portion 107 of the case 21 and the first support column portion 137 of the cover 22 is an edge portion of the arc-shaped cutout portion 48 a. .

  Further, the convex portion 137 a of the first support column portion 137 of the cover 22 is inserted into the circular concave portion 107 a of the first placement portion 107 of the case 21 to constitute the locking portion 170. The convex portion 137 a of the first support column 137 passes through the inside of an arc-shaped cutout portion 48 a provided at the tip edge of the first protruding portion 48 of the motor case 41. Further, the locking pillar 109 of the case 21 abuts the locking cylinder 140 provided in the cover main body member 23 through the through hole 48b of the first protruding portion 48, and The protrusion 109a at the tip is inserted into the center hole 140a of the locking cylinder 140.

  When the cover 22 is stacked on the case 21, the end surface in the −Z direction of the first cylindrical portion 135 of the cover 22 is slightly ahead of the time when the end surface in the + Z direction of the first column portion 106 of the case 21 abuts. In addition, the dimension between them is controlled such that the front end surface of the first support column 137 contacts the first projecting portion 48 of the motor case 41.

  Thereafter, as shown in FIG. 14, the connecting portion 12 of the pulley 4 is inserted inside the bearing tube portion 155 of the radial bearing member 24. At this time, the output shaft portion 36 of the output gear 31 is inserted into the connection portion 12. The pulley 4 and the output gear 31 are fixed coaxially with a screw 165.

  In a state where the pulley 4 and the output gear 31 are connected, the annular step portion 158 protruding in the + Z direction (pulley 4 side) on the end surface in the + Z direction of the radial bearing member 24 is the − of the winding portion 11 of the pulley 4. It enters the annular groove 13 provided on the end surface in the Z direction. Further, in the state where the pulley 4 and the output gear 31 are connected, the annular protrusion 14 provided on the end surface in the −Z direction of the winding portion 11 of the pulley 4 is connected to the annular step on the end surface in the + Z direction of the radial bearing member 24. It faces the outer peripheral side annular end surface portion 24b on the outer peripheral side with respect to the portion 158 with a slight gap therebetween. Here, when a load is applied to the radial bearing member 24, the annular protrusion 14 of the pulley 4 slides on the outer peripheral side annular end surface portion 24 b of the radial bearing member 24.

In such a state, the bracket 7 is arranged on the + Z direction side of the cover 22. And as shown in FIG. 1, the case 21, the cover 22, and the bracket 7 are fixed using the volt | bolts 8a-8e. That is, the case 21, the cover 22, and the bracket 7 are fixed by screwing the bolt 8 a into the first fastening portion 161 from the + Z direction through the through hole provided in the bracket 7. In addition, the case 21, the cover 22, and the bracket 7 are fixed by screwing the bolt 8 b into the second fastening portion 162 from the + Z direction through a through hole provided in the bracket 7. Further, a bolt 8c is screwed into the third fastening portion 163 from the + Z direction, and the case 21, the cover 22, and the motor case 41 are fixed.

  Further, the bolt 7 d is screwed into the bracket fixing screw hole 130 a formed in the fourth boss 130 of the cover 22 through the through hole provided in the bracket 7, and the bracket 7 and the cover 22 are fixed. Further, the bolt 7 e is screwed into the bracket fixing screw hole 131 a formed in the fifth boss 131 of the cover 22 through the through hole provided in the bracket 7, and the bracket 7 and the cover 22 are fixed. Thereby, the drain valve driving device 1 is completed.

(Details of gear train)
The details of the gear train 32 and the operation of the drain valve driving device 1 will be described below. FIG. 15 is an explanatory diagram of the motor 40 and the gear train 32, FIG. 15 (a) is an exploded perspective view of the motor 40 and the gear train 32 as seen from the + Z direction side, and FIG. It is the perspective view which looked at the lever from the -Z direction side. In the gear train 32, the transmission train train 50 that transmits the driving force from the motor 40 to the output gear 31 includes a rotor pinion 51, a planetary gear mechanism 52, and a reduction gear 53, as shown in FIGS. Prepare. The rotation center axis of the rotor pinion 51 is the O axis, the rotation center axis of the planetary gear mechanism 52 is the E axis, the rotation center axis of the reduction gear 53 is the D axis, and the rotation center axis of the output gear 31 is the C axis. It is. The transmission wheel train 50 transmits the driving force of the motor 40 in this order.

  The rotor pinion 51 is made of resin. As shown in FIG. 8, the rotor pinion 51 is supported by a fixed shaft 453 of the rotor 45 so as to be rotatable and movable in the direction of the axis O (that is, the Z-axis direction). A first clutch mechanism 60 is provided between the rotor pinion 51 and the rotor 45. By switching the connection state of the first clutch mechanism 60, the rotor pinion 51 rotates together with the rotor 45 (clutch connection state), and the rotor pinion 51 does not rotate together with the rotor 45 (clutch disengagement state). Can be switched to.

  As shown in FIG. 8, the planetary gear mechanism 52 includes a first rotating body 522 in which the sun gear 521 is formed, a second rotating body 524 in which the internal gear 523 is formed, the sun gear 521 and the internal gear 523. A plurality of planetary gears 525 that mesh with each other, and a third rotating body 526 that rotatably holds the plurality of planetary gears 525. The first rotating body 522 includes a large-diameter gear portion 527 that meshes with the rotor pinion 51. That is, the large diameter gear portion 527 is an input gear to which the rotation of the rotor pinion 51 is input. A large-diameter gear portion 528 that meshes with the speed increasing gear 85 of the second clutch mechanism 80 is formed on the outer peripheral surface of the second rotating body 524. As will be described later, the second clutch mechanism 80 is switched between a locked state in which the rotation of the speed increasing gear 85 is restricted and an idle state in which the speed increasing gear 85 runs idle. When the drain valve driving device 1 is started, the second clutch mechanism 80 is locked and the rotation of the second rotating body 524 is restricted by the speed increasing gear 85.

  When the rotation of the second rotating body 524 is restricted, the third rotating body 526 that is a planet carrier rotates based on the rotation of the sun gear 521. A small-diameter gear portion 529 that meshes with the large-diameter gear portion 531 of the reduction gear 53 is formed at the end portion of the third rotating body 526 in the −Z direction. That is, the planetary gear mechanism 52 is configured to transmit rotational torque to the reduction gear 53 when the rotation of the second rotating body 524 is restricted via the speed increasing gear 85 of the second clutch mechanism 80. On the other hand, when the speed increasing gear 85 of the second clutch mechanism 80 is switched to the idling state, even if the planetary gear 525 tries to revolve, the second rotating body 524 having the internal gear 523 is idling, so that the planet carrier The third rotating body 526 is not rotated. Accordingly, the rotational torque is not transmitted to the reduction gear 53.

The reduction gear 53 is a large-diameter gear portion 531 that meshes with the small-diameter gear portion 529 of the third rotating body 526.
In addition, a small-diameter gear portion 532 that meshes with the output gear 31 is provided, and is rotatably supported by a fixed shaft 533. The reduction gear 53 reduces the rotation output from the planetary gear mechanism 52 and transmits it to the output gear 31.

(First clutch mechanism)
As shown in FIG. 8, the first clutch mechanism 60 includes a first clutch pawl 61 formed on the end surface in the −Z direction of the rotor pinion 51, and a second clutch pawl 62 formed on the shaft portion 452 of the rotor 45. A coil spring 63 (see FIG. 15) that biases the rotor pinion 51 in a direction away from the shaft portion 452 (in this embodiment, + Z direction), and the rotor pinion 51 are pushed down toward the rotor 45 (−Z direction). A fan-shaped clutch switching lever 64 for switching the connection and disconnection of the first clutch mechanism 60 is provided. The clutch switching lever 64 is disposed on the + Z direction side of the reduction gear 53 and is rotatably supported by the fixed shaft 533. The rotor pinion 51 has a coupling position where the first clutch pawl 61 and the second clutch pawl 62 are engaged, and the first clutch pawl 61 and the second clutch pawl 62 are separated from each other in the Z-axis direction. It moves to the separated position where is released.

  As shown in FIG. 15B, the clutch switching lever 64 is formed with a cam pin 65 and an inclined cam 67 protruding in the −Z direction. The cam pin 65 is formed on the edge of the clutch switching lever 64 on the output gear 31 side, and is inserted into a cam groove 66 formed on the end surface of the output gear 31 in the + Z direction. The inclined cam 67 is a cam portion that moves the rotor pinion 51 in the −Z direction, and includes an inclined surface 671 extending in the circumferential direction and a cam surface 672 extending in the circumferential direction on the counter-output side CCW of the inclined surface 671. Prepare. The cam surface 672 is a horizontal plane perpendicular to the rotation axis direction (Z direction) of the clutch switching lever 64.

  When the clutch switching lever 64 rotates to the output gear 31 side (CCW direction) (see FIG. 5), the rotor pinion 51 is pushed down to the shaft portion 452 side (−Z direction side) by the inclined surface 671 of the inclined cam 67. . As a result, the first clutch pawl 61 and the second clutch pawl 62 are engaged, and the first clutch mechanism 60 switches to a clutch engaged state in which the rotor pinion 51 rotates integrally with the shaft portion 452. In the clutch engaged state, the rotor pinion 51 is held at the coupling position pushed down in the −Z direction by the cam surface 672 of the inclined cam 67. On the other hand, when the clutch switching lever 64 is rotated toward the planetary gear mechanism 52 (in the CW direction), the inclined cam 67 is retracted from the position overlapping the rotor pinion 51, so that the rotor pinion 51 is urged by the urging force of the coil spring 63. Is pushed up in the + Z direction. As a result, the engagement between the first clutch pawl 61 and the second clutch pawl 62 is released, and the first clutch mechanism 60 switches to the clutch disengaged state.

  The clutch switching lever 64 rotates in conjunction with the rotation of the output gear 31. That is, the clutch switching lever 64 reciprocates around the D axis, which is the rotation center axis of the reduction gear 53, within a predetermined angular range by moving the cam pin 65 through the cam groove 66 provided in the output gear 31. . More specifically, the output gear 31 rotates toward the output gear 31 in conjunction with the rotation of the output gear 31 in the CW direction. Thereby, a clutch connection operation is performed. Further, when the output gear 31 rotates in the CCW direction, the output gear 31 is rotated toward the planetary gear mechanism 52 in conjunction with the rotation of the output gear 31 in the CCW direction. Here, when the output gear 31 rotates in the CCW direction, the projection 55 protruding in the + Z direction from the output gear 31 presses the clutch switching lever 64 and rotates it toward the planetary gear mechanism 52 side. Thereby, the clutch disengagement operation is started.

The drain valve driving device 1 starts drainage by rotating the output gear 31 in the rotation direction (that is, the CCW direction) when the wire 3 is pulled to the housing 6 side, but the position of the protrusion 55 of the output gear 31 is the output When the gear 31 reaches a predetermined rotational position, the clutch switching lever 64 is pressed to rotate toward the planetary gear mechanism 52 (CW direction). For this reason, when the wire 3 approaches the winding end state, the above-described clutch disengagement operation is performed. As a result, the driving force of the motor 40 is not transmitted to the rotor pinion 51, and the operation of the transmission wheel train 50 is stopped. Therefore, it is possible to prevent the wire 3 from being drawn more than a predetermined winding amount, and it is possible to prevent excessive winding of the wire 3.

(Second clutch mechanism)
As shown in FIGS. 8 and 15, the second clutch mechanism 80 includes a rotor gear 47 formed on the induction rotating body 46 that rotates together with the rotor 45 when the rotor 45 rotates, a fan gear 82 that meshes with the rotor gear 47, and a lock lever. Rotating member 81 in which 83 is formed, a lock gear 84, a speed increasing gear 85, and a torsion coil spring 86 are provided. The second clutch mechanism 80 drives the lock lever 83 based on the rotation of the motor 40 to switch between the state where the rotation of the lock gear 84 and the speed increasing gear 85 is restricted and the state where it is not restricted. As a result, the state where the rotational torque is transmitted from the planetary gear mechanism 52 meshing with the speed increasing gear 85 to the speed reduction gear 53 is switched to the state where it is not transmitted. Therefore, it is possible to switch between a state in which the transmission wheel train 50 transmits the driving force and a state in which the driving force is not transmitted.

  As shown in FIGS. 8 and 15, the rotation center axis of the rotation member 81 is the H axis, the rotation center axis of the lock gear 84 is the G axis, and the rotation center axis of the speed increasing gear 85 is the F axis. When the rotor 45 rotates in the forward rotation direction (CW direction), the rotation of the rotor 45 is input to the fan gear 82 that meshes with the rotor gear 47. The fan gear 82 rotates in the direction opposite to the rotation direction of the rotor 45 (CCW direction). As shown in FIG. 15, the fan gear 82 is urged in the same direction as the rotation direction of the rotor 45 (CW direction) by a torsion coil spring 86 spanned between the locking pillar portion 109 of the case 21. ing. Accordingly, the fan gear 82 rotates in the CCW direction against the urging force of the torsion coil spring 86.

  The lock lever 83 rotates in the same direction (CCW direction) as the sector gear 82. The lock gear 84 includes a large-diameter portion 842 in which a plurality of protrusions 841 are formed at equiangular intervals on the outer peripheral surface, and a small-diameter gear portion 843 having a smaller diameter than the large-diameter portion 842. When the fan gear 82 rotates in the CCW direction, the lock lever 83 rotates in the CCW direction and contacts the outer peripheral surface of the large-diameter portion 842 of the lock gear 84. As a result, the lock lever 83 and the protrusion 841 are engaged to restrict the rotation of the lock gear 84. When the rotation is restricted, the tip of the lock lever 83 and the protrusion 841 abut on the tangential direction of the outer peripheral surface of the lock gear 84.

  The second clutch mechanism 80 restricts the rotation of the speed increasing gear 85 when the lock lever 83 restricts the rotation of the lock gear 84. The speed increasing gear 85 includes a large-diameter gear portion 851 and a small-diameter gear portion 852, and the large-diameter gear portion 851 meshes with the small-diameter gear portion 843 of the lock gear 84. On the other hand, the small-diameter gear portion 852 of the speed increasing gear 85 meshes with the large-diameter gear portion 528 formed on the second rotating body 524 of the planetary gear mechanism 52 as shown in FIG. As described above, when the rotation of the second rotating body 524 is restricted via the speed increasing gear 85, the transmission wheel train 50 is in a state where the rotational torque is transmitted from the planetary gear mechanism 52 to the reduction gear 53. That is, the transmission gear train 50 is switched to a state in which the driving force is transmitted by setting the lock gear 84 to the locked state.

  Further, the second clutch mechanism 80 includes a rotor gear 47 that is engaged with the fan gear 82 by restricting the rotation of the lock lever 83 and the fan gear 82 when the lock lever 83 is engaged with the protrusion 841 of the lock gear 84. The rotation of the rotating body 46 is restricted. As a result, the relative rotational speed between the rotor 45 and the induction rotor 46 increases. The second clutch mechanism 80 rotates when a rotational force is applied from the speed increasing gear 85 side to the lock gear 84 by a braking force due to an eddy current generated between the induction rotating body 46 and the magnet 451. The lock gear 84 and the lock lever 83 are held so as not to be disengaged by force. Therefore, the locked state that restricts the rotation of the lock lever 83 can be maintained.

  When the energization of the motor 40 is stopped in a state where the lock gear 84 is locked by the lock lever 83, the second clutch mechanism 80 is released from the lock state of the lock gear 84 and is switched to the idle state. That is, when the rotation of the rotor 45 is stopped, the braking force acting between the induction rotating body 46 and the magnet 451 disappears. Therefore, the rotor gear 47 cannot hold the fan gear 82 against the biasing force of the torsion coil spring 86, and the fan gear 82 rotates in the biasing direction of the torsion coil spring 86. Since the lock lever 83 is separated from the lock gear 84 by the rotation of the fan gear 82, the lock state of the lock gear 84 is released. As a result, the second clutch mechanism 80 switches to a state in which the lock gear 84 and the speed increasing gear 85 are idle.

  When the speed increasing gear 85 of the second clutch mechanism 80 is switched to the idling state, in the transmission wheel train 50, the second rotating body 524 of the planetary gear mechanism 52 is switched to the idling state. In this state, when the external load applied to the wire 3 is transmitted from the output gear 31 side to the transmission wheel train 50, the second rotating body 524 is idled as the third rotating body 526 meshing with the reduction gear 53 rotates. To do. Therefore, the load holding state of the pulley 4 is released, and the pulley 4 can be pulled out by an external load.

(Rotation restriction mechanism)
As shown in FIG. 15, the rotation restricting mechanism 70 includes a locking piece 673 (see FIG. 15B) provided on the clutch switching lever 64 and a locked piece 511 provided on the rotor pinion 51 (FIG. 15). (See (a)). The locking piece 673 is a convex portion protruding in the −Z direction from the clutch switching lever 64. The locked piece 511 is provided on the end surface of the rotor pinion 51 in the + Z direction. The locked piece 511 extends radially outward from the O axis, which is the rotation center axis of the rotor pinion 51. Two pieces to be locked 511 are provided symmetrically with the O-axis interposed therebetween. When the locking piece 673 of the clutch lever 500 engages with the locked piece 511 of the rotor pinion 51 from the circumferential direction, the rotation of the rotor pinion 51 stops. Accordingly, the rotation of the first rotating body 522 of the planetary gear mechanism 52 that meshes with the rotor pinion 51 is restricted.

  When the slider 10 is retracted and the clutch switching lever 64 rotates toward the planetary gear mechanism 52 (CW direction) to move the rotor pinion 51 in the clutch disengagement direction (+ Z direction), the rotation restricting mechanism 70 The locking piece 673 and the locked piece 511 are engaged to restrict the rotation of the first rotating body 522.

  Here, since the rotation of the second rotating body 524 is restricted by the speed increasing gear 85 when the drain valve driving device 1 is started as described above, the planetary gear mechanism 52 is controlled by the rotation restricting mechanism 70. When the rotation is restricted, the rotation of the third rotating body 526 meshing with the reduction gear 53 is also restricted, and the locked state is established. Therefore, even if an external force is applied to the wire 3 and a rotational torque is applied to the transmission wheel train 50 from the pulley 4 side, the rotational torque is not transmitted, and a load holding state for holding the wire 3 in a wound state is formed. . Specifically, when an external force that pulls the wire 3 in the + X direction is applied while the wire 3 is being wound, a rotational torque in the CW direction is applied to the first rotating body 522. At this time, the rotation restricting mechanism 70 restricts the rotation of the first rotating body 522 in the CW direction.

  Further, when the rotation restricting mechanism 70 is switched to a load releasing state where the slider 10 can be pulled out by an external force and the slider 10 is pulled out, the clutch switching lever 64 is moved to the output gear 31 side (CCW) as the output gear 31 rotates. When the rotation of the first rotating body 522 is released, the engagement between the locking piece 673 and the locked piece 511 is released. At this time, the clutch switching operation of the first clutch mechanism 60 is performed by the rotation of the clutch switching lever 64.

(Operation at startup)
The operation | movement at the time of starting of the drain valve drive apparatus 1 is demonstrated. It is assumed that at the time of activation, the wire 3 is pulled out to a position where the drain valve is closed. When energization of the motor 40 is started in this state, the rotor 45 starts to rotate. At this time, since the rotation of the rotor 45 in the reverse rotation direction is restricted by a reverse rotation prevention mechanism (not shown), the rotor 45 rotates in the normal rotation direction.

  As the rotor 45 rotates in the forward direction, the second clutch mechanism 80 switches to a state in which the lock gear 84 is locked. That is, the fan gear 82 rotates against the urging force of the torsion coil spring 86 due to the output rotation of the rotor gear 47, and the lock lever 83 contacts the lock gear 84 and engages with the protrusion 841 to lock the lock gear 84. . Thereby, the transmission wheel train 50 is switched to a state in which the rotational torque is transmitted to the output gear 31. Therefore, in the transmission wheel train 50, the rotation of the second rotating body 524 of the planetary gear mechanism 52 is restricted by the speed increasing gear 85 of the second clutch mechanism 80, and the rotation of the rotor pinion 51 is reduced from the planetary gear mechanism 52 to the reduction gear 53. Switch to the state transmitted to Therefore, the winding operation of the wire 3 by the pulley 4 is performed by the rotation of the rotor 45 in the forward rotation direction.

(Operation at the end of winding the wire)
In the drain valve driving device 1, when the winding of the wire 3 is finished, the clutch switching lever 64 of the first clutch mechanism 60 is rotated to perform the clutch disengaging operation, and the rotation of the rotor 45 is not input to the transmission wheel train 50. . Accordingly, the wire 3 is not wound more than a predetermined winding amount. Further, by the rotation of the clutch switching lever 64, the locking piece 673 of the clutch switching lever 64 and the locked piece 511 of the rotor pinion 51 are engaged to restrict the rotation of the rotor pinion 51. Thereby, rotation of the 1st rotary body 522 of the planetary gear mechanism 52 is controlled. That is, since the rotation restricting mechanism 70 restricts the rotation of the first rotating body 522 of the planetary gear mechanism 52 by the rotation of the clutch switching lever 64, the planetary gear mechanism 52 is locked, and the transmission wheel train 50 transmits the rotational torque. become unable. Therefore, even if a force for pulling the wire 3 in the + X direction is applied, the pulley 4 does not rotate, and the load is held. As a result, the drain valve is held open.

(Operation when the load is released)
When the drainage valve drive device 1 cuts off the power to the motor 40 in the load holding state, the drain valve driving device 1 shifts to a load releasing state where the wire 3 can be pulled out by force. When the motor 40 is de-energized, the rotation of the rotor 45 stops. Since the fan gear 82 returns to the biasing direction of the torsion coil spring 86 when the rotation of the rotor 45 is stopped, the second clutch mechanism 80 releases the contact between the lock lever 83 and the lock gear 84 and restricts the rotation of the lock gear 84. Is released. As a result, the transmission wheel train 50 switches to a state in which no rotational torque is transmitted to the output gear 31. That is, since the rotation restriction of the second rotating body 524 is released in the planetary gear mechanism 52 of the transmission wheel train 50, the planetary gear mechanism 52 is unlocked. As a result, the transmission wheel train 50 is in a load release state in which it can idle. In this state, when a force in the direction of pulling out the wire 3 is applied, the transmission wheel train 50 and the output gear 31 rotate idly and the pulley 4 rotates, so that the wire 3 is pulled out. A brake rubber 87 is incorporated in the lock gear 84. The brake rubber 87 expands by centrifugal force when the wire 3 is pulled out by force, and generates a frictional force with the lock gear 84. Thereby, the drawing speed when the wire 3 is pulled out decreases. Therefore, the risk of breakage due to the wire 3 being pulled out abruptly can be reduced.

When the wire 3 is pulled out to a predetermined position before reaching the maximum pulling position, the clutch engagement operation starts based on the rotation of the output gear 31 in the CW direction. That is, the clutch switching lever 64 is rotated to the output gear 31 side by the cam groove 66 formed in the output gear 31 and the cam pin 65 provided in the clutch switching lever 64, and the clutch connection operation is performed. As a result, the state returns to the state in which the rotation of the rotor 45 is input to the transmission wheel train 50. Further, since the engagement of the locking piece 673 of the clutch switching lever 64 and the locked piece 511 of the rotor pinion 51 is released by the rotation of the clutch switching lever 64, the planetary gear mechanism 52 by the rotation restricting mechanism 70 is released. The lock of the first rotating body 522 is released. Accordingly, the transmission wheel train 50 returns to a state where the rotational torque can be transmitted to the output gear 31.

(Function and effect)
In this example, in the geared motor 5, the motor 40 is fixed to the housing 6 by sandwiching the first protruding portion 48 of the motor case 41 between the case 21 and the cover 22. The clamped portion 48c of the first protruding portion 48 of the motor case 41 is spaced apart from the first fastening portion 161 with the locking portion 170 interposed therebetween. Therefore, even when the case 21 and the cover 22 are fastened and fixed with a strong force using the bolt 8a in the first fastening portion 161, the first projecting portion 48 (the sandwiched portion 48c) is sandwiched between the case 21 and the cover 22. It is possible to prevent or suppress deformation of the protruding portion.

  That is, in this example, as shown in FIG. 5, the first projecting portion 48 of the motor case 41 sandwiched between the case 21 and the cover 22 does not include a through hole through which the bolt 8a passes, and the first projecting portion. A notch 48 a is provided at the front end edge of 48. Therefore, when the case 21 and the cover 22 are fixed by the bolt 8a, the outer periphery of the bolt 8a is between the first mounting portion 107 and the first support column 137 as shown in FIG. Thus, a gap S corresponding to the thickness of the first protruding portion 48 is formed at a position corresponding to the notch 48 a of the first protruding portion 48. Therefore, when the case 21 and the cover 22 are fixed, if a bolt is disposed at a position adjacent to the first projecting portion 48 and the tightening force of the bolt is increased, the tip portion of the first support column 137 is unevenly distributed. Load may be applied and the tip of the first support column 137 may be crushed.

  Here, when deformation such as the collapse of the first support column 137 occurs in the cover 22, the cover 22 approaches the case 21, and the gear wheel train 32 housed in the housing 6 interferes with the cover 22 to cause the gear wheel train. 32 operations may be hindered. For example, when the cover 22 approaches the case 21, the rotor pinion 51 and the rotor 45 approach each other, and the operation of the first clutch mechanism 60 may be hindered.

  For such a problem, as shown in FIG. 13, in this example, the first fastening portion 161 is not provided at a position adjacent to the first protruding portion 48 (the sandwiched portion 48 c). Therefore, even when the case 21 and the cover 22 are fastened and fixed with a strong force using the bolt 8a in the first fastening portion 161, the portion sandwiching the first protruding portion 48 in the case 21 or the cover 22 is deformed. This can be prevented or suppressed.

  On the other hand, at a position adjacent to the sandwiched portion 48c of the first projecting portion 48 sandwiched between the case 21 and the cover 22, a locking portion 170 (first cover 22) that locks the case 21 and the cover 22 is provided. A protrusion 137 a of the support column 137 and a circular recess 107 a of the first mounting portion 107 of the case 21 are provided. Thereby, it is possible to prevent the positions of the case 21 and the cover 22 from being shifted in a portion where the first protruding portion 48 is sandwiched. Therefore, the first protruding portion 48 can be securely sandwiched between the case 21 and the cover 22. In addition, a concave portion is provided on the tip surface of the first support column 137, and a convex portion is provided on the placement surface of the first placement portion 107, and these are used as a locking portion 170 that locks the case 21 and the cover 22. You can also.

  Further, in this example, the convex portion 137a of the first support column portion 137 constituting the locking portion 170 is located inside the arc-shaped cutout portion 48a provided at the tip edge of the first projecting portion 48 of the motor case 41. pass. Therefore, the position of the motor case 41 in the direction intersecting the Z-axis direction can be defined by the notch 48a and the projection 137a provided in the first projecting portion 48. Further, with this configuration, the locking portion 170 and the sandwiched portion 48c can be arranged at adjacent positions.

  Here, the first support column 137 is provided with a recess 137 b extending in the Z-axis direction from the end surface opposite to the case 21. Thereby, it can prevent that the 1st support | pillar part 137 becomes thick too much. Therefore, it is easy to mold the resin cover 22.

  In this example, the first projecting portion 48 is provided with an arc-shaped cutout portion 48a, and the edge portion of the notch portion 48a in the first projecting portion 48 is used as the sandwiched portion 48c. Although the convex part 137a of the 1 support | pillar part 137 shall pass the inner side of the notch part 48a, the notch part 48a can also be abbreviate | omitted. In this case, the outer peripheral edge portion of the first projecting portion 48 is used as a sandwiched portion, and the position between the first projecting portion 48 and the first fastening portion 161 in the case 21 and close to the first projecting portion 48. A locking portion 170 may be provided in

  In the above example, the rotation preventing projections 91 and 92 are provided on the case 21, but these projections may be provided on the cover 22 side when they do not interfere with the gear wheel train 32 and the like.

  Further, in the drain valve driving device 1 of the present example, the cover 22 includes the cover main body member 23 having the opening 23 a and the radial bearing member 24 attached to the opening 23 a and is coaxially connected to the output gear 31. The pulley 4 thus supported is supported by the radial bearing member 24 so as to be rotatable from the radial direction. That is, in this example, since the cover main body member 23 and the radial bearing member 24 are separate bodies, the attitude of the radial bearing member 24 that supports the pulley 4 can be maintained even when the cover main body member 23 is deformed. It becomes. Thereby, since it can prevent or suppress that the axis line of the output gear 31 to which the pulley 4 is coaxially connected is inclined, the meshing between the output gear 31 and the reduction gear 53 which is the final gear of the gear train 32 becomes shallow. Can be prevented or suppressed. As a result, it is possible to prevent or suppress the occurrence of tooth skipping between the output gear 31 and the reduction gear 53, which causes a problem in winding the wire 3 by the pulley 4 and a problem in driving the drain valve. This can be prevented or suppressed.

  Furthermore, since the cover main body member 23 and the radial bearing member 24 are separated, the cover main body member 23 and the radial bearing member 24 can be formed from different materials. Therefore, in this example, the radial bearing member 24 can be formed from a material having high slidability while the cover main body member 23 is formed from a highly rigid material (glass fiber-containing resin) and deformation is suppressed. Further, the radial bearing member 24 can be formed from a material with low wear resistance (resin that does not contain glass fiber), and the occurrence of wear on the pulley 4 that slides on the radial bearing member 24 can be suppressed.

  Further, the radial bearing member 24 is fitted into a bearing tube portion 155 inserted into the opening 23 a of the cover main body member 23 and a circular concave portion 151 provided in the cover main body member 23, and comes into contact with the bottom surface of the circular concave portion 151. Since the annular flange portion 156 is provided, the radial bearing member 24 can be easily attached to the cover body member 23.

  Further, the opening 23a of the cover main body member 23 includes a circular circular opening portion 23b and a pair of cutout opening portions 23c extending from a part in the circumferential direction of the circular opening portion 23b to the outer peripheral side, and the radial bearing member 24 includes: A bearing cylinder portion 155 that fits into the circular opening portion 23b and a pair of protrusions 157 that fit into the pair of cutout opening portions 23c are provided. Therefore, the radial bearing member 24 fixed to the cover body member 23 does not rotate with the pulley 4.

  In this example, an annular step portion 158 protruding in the + Z direction (pulley 4 side) on the end surface in the + Z direction of the radial bearing member 24 is provided on the end surface in the −Z direction of the winding portion 11 of the pulley 4. Enter the annular groove 13. Therefore, the length dimension of the sliding surface 24a of the radial bearing member 24 in the Z-axis direction can be secured while suppressing an increase in the size of the device in the Z-axis direction.

  Further, in this example, the annular protrusion 14 provided on the end surface in the −Z direction of the winding portion 11 of the pulley 4 is arranged on the outer circumferential side of the annular step portion 158 on the end surface in the + Z direction of the radial bearing member 24. It faces the end surface portion 24b with a slight gap. Here, when the pulley 4 is inclined with respect to the radial bearing member 24, the annular convex portion 152 abuts on the outer peripheral side annular end surface portion 24 b of the radial bearing member 24. Therefore, the inclination range of the pulley 4 is regulated.

DESCRIPTION OF SYMBOLS 1 ... Drain valve drive device, 3 ... Wire, 4 ... Pulley, 5 ... Geared motor, 6 ... Housing, 7 ... Bracket, 8a-8e ... Bolt, 11 ... Winding part, 11a ... Fastening part, 11b ... Convex part, DESCRIPTION OF SYMBOLS 12 ... Connection part, 13 ... Ring groove, 14 ... Ring convex part, 21 ... Case, 22 ... Cover, 23 ... Cover main body member, 23a ... Opening part, 23b ... Circular opening part, 23c ... Notch opening part, 24 ... Radial Bearing member, 24a ... sliding surface, 24b ... outer peripheral side annular end surface portion, 31 ... output gear, 32 ... gear train, 35 ... gear portion, 36 ... output shaft portion, 40 ... motor, 41 ... motor case, 41a ... Motor case body, 41b ... plate, 41c ... through hole, 41e ... fixed shaft support part, 41d ... bearing part, 43 ... bobbin, 44 ... stator coil, 45 ... rotor, 46 ... induction rotor, 47 ... rotor gear, 48 First projecting part (motor case part), 48a ... notch part, 48b ... through hole, 49 ... second projecting part, 49a ... through hole for bolt, 50 ... transmission wheel train, 51 ... rotor pinion, 52 ... planetary gear Mechanism 53 ... Reduction gear 55 ... Projection 60 ... Clutch mechanism 61 ... Clutch claw 62 ... Clutch claw 64 ... Clutch switching lever 65 ... Cam pin 66 66 Cam groove 67 ... Inclination cam 70 ... Rotation restriction Mechanism, 80 ... clutch mechanism, 81 ... rotating member, 82 ... fan gear, 83 ... lock lever, 84 ... lock gear, 85 ... speed increasing gear, 87 ... brake rubber, 90 ... motor housing, 91/92 ... non-rotating Projection (non-rotating portion), 100: terminal accommodating portion, 101: case side frame portion, 101a ... first corner portion, 101b ... second corner portion, 101c ... third corner portion, 101d ... projecting frame portion, 102 ... annular DESCRIPTION OF SYMBOLS 103 ... Cylindrical part 104 ... Circular plate part 106 ... 1st pillar part 106a ... Case side 1st screw hole, 107 ... 1st mounting part, 107a ... Circular recessed part (recessed part for latching), 108 ... Projection 109, locking pillar 109 a, projection 111, second pillar 111 a second case side screw hole 113 113 second mounting part 113 a third case screw hole 114, 114 Projection, 116 ... Stepped part, 116a ... End face, 117 ... Second mounting part, 121 ... Ceiling plate part, 122 ... Cover side frame part, 122a ... First corner, 122b ... Second corner, 122c ... First Triangular part, 122d ... Projection frame part, 123 ... Step part, 123a ... End face, 125 ... Arc-shaped rib, 125a ... Recess, 127 ... First boss, 128 ... Second boss, 129 ... Third boss, 130 ... First 4 bosses, 130a ... bracket fixing screw holes, 131 ... fifth boss, 13 DESCRIPTION OF SYMBOLS 1a ... Bracket fixing screw hole, 135 ... 1st cylinder part, 136 ... Cover side 1st fixing hole, 137 ... Support | pillar part, 137a ... Convex part (locking convex part), 137b ... Concave part, 138 ... Large diameter part 139: Small diameter portion, 139a: Linear contour portion, 139b: Arc-shaped contour portion, 140: Locking cylinder portion, 140a ... Center hole, 141 ... Second tube portion, 142 ... Cover side second fixing hole, 145 ... 2nd support | pillar part, 146 ... Large diameter part, 147 ... Small diameter part, 147a ... Linear outline part, 147b ... Arc-shaped outline part, 148 ... Cover side 3rd fixing hole, 151 ... Circular recessed part, 152 ... Circular convex part 155 ... Bearing cylinder part, 156 ... Annular flange part, 157 ... Projection part, 158 ... Annular step part, 161 ... First fastening part, 162 ... Second fastening part, 163 ... Third fastening part, 165 ... Screw, 170 ... Locking part, 451 ... Magne , 452... Shaft, 453... Fixed shaft, 511... Locked piece, 521. Sun gear, 522. First rotating body, 523... Internal gear, 524. 3rd rotating body, 533 ... fixed shaft, 671 ... inclined surface, 672 ... cam surface, 673 ... locking piece, 841 ... projection, 842 ... large diameter portion, 527 ... large diameter gear portion, 528 ... large diameter gear 529 ... small diameter gear part, 531 ... large diameter gear part, 532 ... small diameter gear part, 843 ... small diameter gear part, 851 ... large diameter gear part, 852 ... small diameter gear part, C ... axis of output gear, S ... gap

Claims (15)

An annular stator, a rotor located inside the stator, and a motor including a motor case;
An output gear,
A gear train that transmits driving force from the motor to the output gear;
A housing that houses at least a portion of the motor, the gear train, and the output gear;
Have
The housing includes a case and a cover laminated on the case in the axial direction of the output gear,
The motor case includes a motor case portion located on the outer side in the radial direction from the outer peripheral surface of the stator,
The motor case portion includes a sandwiched portion that is sandwiched between the case and the cover in the axial direction.
A fastening portion for fastening the case and the cover is provided on the outer peripheral side of the sandwiched portion,
A geared motor, wherein a locking portion for locking the case and the cover is provided between the fastening portion and the clamped portion and at a position close to the clamped portion.   2. The geared motor according to claim 1, wherein the case or the cover includes a rotation preventing portion that comes into contact with the motor case portion from a circumferential direction. The fastening portion includes a through hole penetrating the cover in the axial direction, and a screw hole provided coaxially with the through hole in the case,
The geared motor according to claim 1 or 2, wherein the cover and the case are fixed by a bolt that penetrates the through hole from the opposite side to the case and is screwed into the screw hole. .   The locking part is provided on one of the case and the cover and protrudes to the other side, and the locking part is provided on the other side of the case and the cover and the locking convex part is inserted. The geared motor according to any one of claims 1 to 3, further comprising a locking recess. The motor case part is provided with an arc-shaped notch when viewed from the axial direction,
The locking convex portion passes through the inside of the notch,
The geared motor according to claim 4, wherein the sandwiched portion is an edge portion of the notch portion in the motor case portion. The cover includes a column portion extending in the axial direction toward the case,
The case has a mounting surface on which the motor case portion is mounted, facing the cover side,
One of the locking convex portion and the locking concave portion is provided on the tip surface of the column portion on the case side, and the other is provided on the mounting surface.
The geared motor according to claim 4 or 5, wherein the sandwiched portion is sandwiched between the tip surface of the column portion and the mounting surface. The cover is made of resin,
The locking convex portion is provided on the front end surface of the column portion on the case side,
The locking recess is provided on the mounting surface.
The geared motor according to claim 6, wherein the pillar portion is provided with a recess extending in the axial direction from an end surface opposite to the case. A geared motor according to any one of claims 1 to 7,
A wire connected to an external drain valve;
A pulley capable of winding the wire;
The drain valve driving device according to claim 1, wherein the pulley is coaxially connected to the output gear.   The drainage according to claim 8, wherein the cover includes a cover main body member having an opening, and a radial bearing member that is attached to the opening and supports the pulley so as to be rotatable from a radial direction. Valve drive device. The radial bearing member includes a bearing tube portion that is inserted into the opening, an annular flange portion that extends from the bearing tube portion to an outer peripheral side and contacts an opening edge portion on the case side of the opening in the cover, With
The drain valve driving device according to claim 9, wherein an inner peripheral surface of the bearing tube portion is a sliding surface on which the pulley slides. The opening includes a circular opening portion and a notch opening portion that extends from a portion of the circular opening portion in the circumferential direction to the outer peripheral side,
The drain valve driving device according to claim 10, wherein the radial bearing member includes a protruding portion that protrudes from the bearing tube portion toward the outer peripheral side and fits into the notch opening portion.   The drain valve driving device according to any one of claims 9 to 11, wherein the cover main body member is formed of a material having higher rigidity than the radial bearing member. The output gear includes a gear portion that meshes with a final gear of the gear train, and an output shaft portion that is coaxial with the gear portion,
The gear portion is housed in the housing;
The output shaft portion is located inside the opening,
The pulley includes a winding portion around which the wire is wound on the side of the cover opposite to the case, and a cylindrical connection portion that extends coaxially from the winding portion and is inserted into the opening. Prepared,
The output shaft portion is inserted inside the connection portion,
The drain valve driving device according to any one of claims 9 to 12, wherein the radial bearing member supports the connecting portion from an outer peripheral side. The bearing tube portion includes a step portion in which the inner peripheral side protrudes to the pulley side rather than the outer peripheral side at a position in the radial direction of the end surface on the pulley side,
The drain valve driving device according to claim 13, wherein the pulley includes an annular groove that receives the stepped portion around the connection portion on an end surface of the winding portion on the radial bearing member side. The pulley includes, on an end surface of the winding portion on the radial bearing member side, an annular protrusion that protrudes toward the radial bearing member along an outer peripheral edge of the annular groove,
When the pulley is inclined with respect to the radial bearing member, the annular convex portion is in contact with an end surface portion on the outer peripheral side of the stepped portion of the end surface on the pulley side of the radial bearing member. The drain valve driving device according to claim 14.

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