CN211231807U

CN211231807U - Driving device for drain valve

Info

Publication number: CN211231807U
Application number: CN201922221447.2U
Authority: CN
Inventors: 宫下敏臣
Original assignee: Nidec Sankyo Corp
Current assignee: Nidec Instruments Corp
Priority date: 2018-12-18
Filing date: 2019-12-12
Publication date: 2020-08-11
Anticipated expiration: 2029-12-12
Also published as: JP2020097983A; CN111336307B; CN111336307A

Abstract

A drain valve driving device includes a wire connected to a drain valve and a pulley, and prevents the wire from falling off the pulley. A drain valve drive device (1) is provided with a wire (10) to which a drain valve is connected, a pulley (11) connected to the wire, a motor (40) and a gear unit (2) that drive the pulley, and a case (20) that houses the pulley, the motor, and the gear unit. The housing (20) is provided with an opening (23) for leading the wire (10) to the outside, and a wire position regulating section (19) for regulating the position of the wire (10) between the opening (23) and the pulley (11). The wire position regulating portion (19) is wall-shaped, and the gap (S) between the wire position regulating portion (19) and the pulley (11) is smaller than the wire diameter (D) when viewed in the direction (+ Y direction) from the opening portion (23) toward the pulley (11), so that the wire (10) can be moved only within a range where the wire does not fall off from the pulley (11).

Description

Driving device for drain valve

Technical Field

The utility model relates to a drain valve drive arrangement for opening and close drain valve.

Background

As a drain valve driving device for opening and closing a drain valve of a washing machine or the like, there is a device including a drain valve driving member connected to the drain valve and a gear motor for driving the drain valve driving member. Patent document 1 discloses a drain valve driving device including a wire as a drain valve driving member. In patent document 1, a gear motor includes a housing, and a motor unit and a transmission gear train housed inside the housing. The driving force of the motor part is transmitted to the belt wheel through the transmission gear train.

The drain valve driving device of patent document 1 includes a clutch mechanism for turning on and off transmission of a rotational torque from a motor unit to a transmission gear train, and a rotation restriction mechanism for restricting rotation of the transmission gear train. When the driving member is in the clutch-off state, the rotation of the transmission train is restricted, and a load holding state is formed in which the driving member of the drain valve is not moved by an external force. In the load holding state, the wire is pulled by an external force.

Documents of the prior art

Patent document

Patent document 1: japanese patent laid-open publication No. 2018-26938

SUMMERY OF THE UTILITY MODEL

Technical problem to be solved by the utility model

In patent document 1, since a flexible wire rod is used as the drain valve driving member, the wire rod may be obliquely pulled depending on the arrangement of the drain valve connected to the wire rod. Since the pulley is not configured to restrict the inclination of the wire, the wire may fall off the pulley when the wire is inclined too much.

In view of the above, an object of the present invention is to provide a drain valve driving device including a wire connected to a drain valve and a pulley around which the wire is wound, in which the wire is prevented from falling off from the pulley due to a change in the drawing direction of the wire.

Technical scheme for solving technical problem

In order to solve the technical problem, the utility model provides a drain valve drive arrangement which characterized in that has: a wire connected to the drain valve; a pulley that connects the wire; a driving unit that drives the pulley; and a housing that houses the pulley and the driving unit, the housing including: an opening portion for drawing the wire rod to the outside; and a wire position regulating portion that regulates a position of the wire between the opening portion and the pulley, a gap between the wire position regulating portion and the pulley being smaller than a diameter of the wire when viewed from the opening portion in a direction toward the pulley.

In the present invention, the wire position regulating portion is provided at a position where the clearance with the pulley is smaller than the wire diameter (diameter of the wire) when viewed from the direction from the opening portion toward the pulley. Therefore, the wire position regulating portion can regulate the position of the wire rod so that the wire rod can move only within the range where the wire rod does not fall off the pulley, and therefore, even if the drawing direction of the wire rod changes, the wire rod does not move to the position where the wire rod falls off the pulley. Therefore, the wire can be prevented from falling off the pulley due to a change in the wire drawing direction.

In the present invention, it is desirable that the wire position restriction portion restricts a moving range of the wire to a side where the wire position restriction portion is located within a range where the edge of the opening portion and the wire do not contact. Thus, damage to the drain valve driving member due to contact with the casing can be avoided.

In the present invention, it is preferable that the wire position regulating portion is a wall extending in a direction from the opening portion toward the pulley. By providing the continuous wall in this manner, the strength of the wire position regulating portion can be improved. Further, since the wire can be guided by the surface, the wire is less likely to be broken due to contact with the wire position regulating portion.

In the present invention, it is preferable that the wire guide plate includes a plate having a through portion through which the wire passes, the housing includes a first housing and a second housing opposed to each other in a first direction, the first housing includes a first side wall portion, the opening portion is a cutout portion formed by cutting the first side wall portion, the wire passes through the cutout portion and is drawn out to the outside of the housing between the second housing and the opening portion, the second housing includes a restriction portion configured to restrict movement of the plate disposed between the opening portion and the pulley, the restriction portion extends in a third direction intersecting a second direction from the opening portion toward the pulley and intersecting the first direction, and the wire position restriction portion extends from the restriction portion toward the pulley side to restrict a position of the wire in the third direction. In this way, the movement of the wire rod can be restricted by the restricting portion via the plate. Further, the position of the wire may be regulated by a wall-shaped wire position regulating portion between the regulating portion and the pulley. Therefore, the restriction portion can prevent the wire from contacting the housing, and the wire position restriction portion can prevent the wire from moving to a position where the wire drops off from the pulley.

(effects of utility model)

According to the utility model discloses, because the position that wire rod position restriction portion can restrict the wire rod makes the wire rod only remove in the within range that can not drop from the band pulley, so even the direction of drawing forth of wire rod changes, the wire rod also can not remove the position that drops from the band pulley. Therefore, the wire can be prevented from falling off the pulley due to a change in the wire drawing direction.

Drawings

Fig. 1 is a perspective view of a drain valve driving apparatus to which the present invention is applied.

Fig. 2 is an exploded perspective view of the driving apparatus of the water discharge valve of fig. 1.

Fig. 3 is a plan view of the driving apparatus of the discharge valve with the first housing removed.

Fig. 4 is a perspective view of the first housing as viewed from a side in the first direction.

Fig. 5 is a partial sectional view of the driving apparatus of the water discharge valve (sectional view at a-a position of fig. 1).

Fig. 6 is a partial sectional view of a connection portion of the first housing and the second housing (sectional view at a position B-B of fig. 1).

Fig. 7 is a partial perspective view of the second housing, the pulley, the plate, and the wire material as viewed from the other side in the first direction.

Fig. 8 is an explanatory view schematically showing the arrangement of the pulleys and the wire position regulating portion as viewed from the opening portion side.

Description of the reference numerals

1 … drain valve drive; 2 … gear unit; 10 … wire rod; 11 … a pulley; 12 … grooves; 13 … board; 14 … penetration part; 15 … a restriction; 16 … first shell-side regulating part; 17 … second housing-side regulating part; 18 … rectangular recess; 19 … a wire position regulating part; 20 … a housing; 21 … a first housing; 22 … a second housing; 23 … opening part; 24 … water dam; a 40 … electric motor; 41 … motor housing; 42 … a support plate; 43 … coil former; 44 … stator coils; 45 … rotor; 50 … drive train; 51 … rotor pinion; 52 … planetary gear mechanism; 53 … reduction gear; 54 … output gear; 60 … first clutch mechanism; 70 … rotation limiting mechanism; 80 … second clutch mechanism; 151 … a first restriction; 152 … a second restriction; 160 … first slot portion; 161 … first wall portion; 162 … a second wall portion; 163 … third wall section; 170 … second slot portion; 171 … first wall portion; 172 … second wall portion; 173, 173 … third wall portion; 181 … a first rectangular recess; 182 … second rectangular recess; 210 … upper plate portion; 211 … a first sidewall portion; 212 … second housing cover portion; 213 … first step; 214 … inner convex part; 215 … outside recess; 216. 217 … planar portion; 220 … bottom plate portion; 221 … second side wall portion; 222 … circular recesses; 223 … second step; 224 … medial concavity; 225 … an outer protrusion; 241 … inclined plane; d … wire diameter; s … a third-direction gap between the wire position regulating portion and the outer peripheral surface of the pulley; a third direction of X …; a second direction of Y …; z … first direction

Detailed Description

(Overall Structure)

Next, a drain valve driving device 1 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 apparatus 1 to which the present invention is applied, and fig. 2 is an exploded perspective view of the drain valve driving apparatus 1 of fig. 1. The drain valve driving device 1 includes a drain valve driving member connected to a drain valve not shown, an output member connected to the drain valve driving member, and a driving unit for driving the output member. In the present embodiment, the drain valve driving member is the wire 10, and the output member is the pulley 11. The pulley 11 rotates about a rotation axis extending in the first direction Z. The drain valve driving device 1 drives the drain valve via the wire 10 by rotating the pulley 11.

In the present specification, the first direction Z, the second direction Y, and the third direction X are mutually orthogonal directions. One side of the first direction Z is a + Z direction, the other side is a-Z direction, one side of the second direction Y is a + Y direction, the other side is a-Y direction, and one side of the third direction X is a + X direction, and the other side is a-X direction. The CW direction and the CCW direction are the CW direction and the CCW direction when the discharge valve drive device 1 is viewed from the + Z direction side.

The drain valve driving device 1 includes a housing 20, and the pulley 11 and the driving unit are disposed inside the housing 20. The housing 20 includes a first housing 21 and a second housing 22 facing each other in the first direction Z. The driving unit for rotating the pulley 11 is a gear motor including a motor 40 and a gear unit 2. The motor 40 is disposed at the bottom of the second housing 22 disposed on one side in the first direction Z (+ Z direction). The gear unit 2 and the pulley 11 are disposed on the other side (the (-Z direction) of the first direction Z of the motor 40. The first housing 21 covers the gear unit 2 and the pulley 11 from the other side (the (-Z direction) of the first direction Z.

As will be described later, the gear unit 2 includes an output gear 54 formed integrally with the pulley 11. An end portion of the wire 10 is fixed to the pulley 11, and the wire 10 is wound in a groove 12 formed on an outer circumferential surface of the pulley 11. The wire 10 is drawn out of the housing 20 through an opening 23 formed in a side surface of the housing 20, and is connected to a drain valve, not shown. In the present embodiment, the housing 20 is made of resin, and the wire 10 is made of metal such as SUS. If the wire 10 as the driving member of the water discharge valve is made of a material harder than the case 20, the risk of breakage of the wire 10 due to contact with the case 20 can be reduced.

As shown in fig. 2, the pulley 11 is disposed on one side (+ Z direction) of the output gear 54 in the first direction Z. The pulley 11 and the output gear 54 are movable to a first rotational position (closed position) and a second rotational position (open position) in the CCW direction with respect to the first rotational position. When the pulley 11 rotates in the CW direction, the wire 10 is fed out. When the pulley 11 is rotated to the first rotational position (closed position), the drain port is closed by the drain valve connected to the wire 10. When the pulley 11 rotates in the CCW direction, the wire 10 is wound. When the pulley 11 is rotated to the second rotational position (open position), the drain valve is separated from the drain port, and drainage is started.

In a state where the pulley 11 and the output gear 54 are moved to the second rotational position (the open position), the discharge valve driving apparatus 1 continues to supply the electric current to the motor 40 as the driving source, and holds the pulley 11 and the wire 10. When the power supply to the motor 40 is stopped and the holding state of the pulley 11 and the wire 10 is released, the drain valve driving device 1 can return the pulley 11 to the first rotational position (closed position) by an external force. For example, the pulley 11 is returned to the first rotational position via the wire 10 by an urging force such as a spring force connected to a valve body of the drain valve, and the drain port is closed by the drain valve.

Fig. 3 is a plan view of the drain valve driving apparatus 1 with the first housing 21 removed. The gear unit 2 includes: a drive train 50 that transmits rotation of the motor 40 to the pulley 11; a first clutch mechanism 60 (see fig. 2) that turns on and off transmission of rotational torque from the motor 40 to the gear train 50; a rotation restricting mechanism 70 that restricts rotation of the gear train 50 and holds the output gear 54 and the pulley 11 when an external load is applied to the pulley 11 via the wire 10; and a second clutch mechanism 80 that switches between a state in which the rotational torque is transmitted and a state in which the rotational torque is not transmitted to the gear train 50. The gear train 50 includes a rotor pinion 51, a planetary gear mechanism 52, a reduction gear 53, and an output gear 54. The drive train 50 sequentially transmits the driving force of the motor 40 to the pulley 11.

(outer cover)

As shown in fig. 1 and 2, the opening 23 of the housing 20 faces the second direction Y. One side (+ Y direction) of the second direction Y is the inside of the housing 20 as viewed from the opening 23, and one side (-Y direction) of the second direction Y is the outside of the housing 20 as viewed from the opening 23. As shown in fig. 2, the rotation center of the pulley 11 is shifted from the front surface of the opening 23 to the other side in the third direction X (the (-X direction), and the groove 12 in the outer peripheral surface of the pulley 11 is positioned on the front surface of the opening 23. Therefore, the wire 10 extends from the front surface of the opening 23 toward the opening 23.

Fig. 4 is a perspective view of the first housing 21 viewed from one side (+ Z direction) of the first direction Z. Fig. 5 is a partial sectional view of the water discharge valve driving device 1 (a sectional view at a position a-a in fig. 1), and is a sectional view taken at a position of the opening portion 23. Fig. 6 is a partial sectional view (sectional view at the position B-B in fig. 1) of a connecting portion between the first housing 21 and the second housing 22, and is a sectional view taken at a position different from the opening 23. As shown in fig. 4 to 6, the first housing 21 includes: an upper plate portion 210 that covers the pulley 11 and the gear unit 2; a first side wall portion 211 extending from an outer peripheral edge of the upper plate portion 210 to one side (+ Z direction) in the first direction Z; and a second housing covering portion 212 that protrudes from the outer peripheral surface of the first side wall portion 211, is bent around the entire outer peripheral side of the first side wall portion 211, and extends toward the second housing 22 side (+ Z direction). As shown in fig. 4 and 6, a first step portion 213 extending along the end portion of the first side wall portion 211 in the + Z direction is provided inside the second housing covering portion 212. The first stepped portion 213 includes an inner convex portion 214 protruding in the + Z direction and an outer concave portion 215 recessed in the Z direction on the outer peripheral side of the inner convex portion 214.

As shown in fig. 2, 3, and 6, the second casing 22 includes a bottom plate portion 220 and a second side wall portion 221 extending from the outer peripheral edge of the bottom plate portion 220 to the other side in the first direction Z (the (-Z direction). As shown in fig. 3 and 5, the bottom plate portion 220 includes a circular recess 222 for accommodating the motor 40. As shown in fig. 2 and 6, a second stepped portion 223 that fits into the first stepped portion 213 of the first housing 21 is formed at the end of the second side wall portion 221 in the-Z direction. The second stepped portion 223 includes an inner concave portion 224 that is concave in the + Z direction and an outer convex portion 225 that is formed by projecting the outer peripheral side of the inner concave portion 224 in the-Z direction.

The motor 40 is an AC (alternating current) synchronous motor. As shown in fig. 5, the motor 40 includes a cup-shaped motor housing 41, a support plate 42 attached to the-Z-side end of the motor housing 41, a bobbin 43 disposed inside the motor housing 41, a stator coil 44 wound around the bobbin 43, and a rotor 45 disposed on the inner peripheral side of the bobbin 43.

As shown in fig. 2 and 4, the first housing 21 includes a rectangular opening 23 formed by cutting out the first side wall portion 211 and the second housing covering portion 212. The first side wall portion 211 includes a flat surface portion 216 constituting a side surface of the first housing 21 in the-Y direction, and the second housing covering portion 212 includes a flat surface portion 217 extending from the flat surface portion 216 in the + Z direction. The

planar portions

216, 217 extend in the third direction X. The opening 23 is a notch formed by cutting the

flat surface portions

216 and 217. The first housing 21 includes a water blocking portion 24 protruding from the outer circumferential surfaces of the first side wall portion 211 and the second housing covering portion 212 in the-Y direction along the edge of the opening 23. In the present embodiment, the water guard portion 24 is formed on the entire edge of the opening portion 23. An inclined surface 241 is provided on the outer peripheral surface of the front end portion of the water guard 24. When water splashes on the tip of the water guard 24, the water flows along the inclined surface 241 toward the base end side (+ Y direction) of the water guard 24, and therefore, the water is less likely to enter the opening 23.

When the first housing 21 and the second housing 22 are assembled to form the housing 20, as shown in fig. 6, the first step portion 213 of the first housing 21 and the second step portion 223 of the second housing 22 are fitted to each other, and the first side wall portion 211 and the second side wall portion 221 are connected to each other. At this time, the inner convex portion 214 of the first stepped portion 213 and the inner concave portion 224 of the second stepped portion 223 are fitted, and the outer concave portion 215 of the first stepped portion 213 and the outer convex portion 225 of the second stepped portion 223 are fitted. Thereby, a connection portion of a so-called damascene structure is formed.

In the present embodiment, the portion of the step portion forming the inlay structure provided on the inner peripheral side of the second step portion 223 in the second housing 22 housing the motor 40 and the gear unit 2 is recessed, and the outer peripheral side is convex. Therefore, the position in the third direction Z of the fitting surface of the first and

second housings

21 and 22 exposed to the inside of the second housing covering portion 212 is the position of the distal end surface of the outer convex portion 225. Therefore, the distance from the front end of the second housing covering portion 212 in the + Z direction to the fitting surface is large, and therefore, even when water splashes onto the housing 20 from the + Z direction, water is less likely to reach the fitting surface. Further, a sealant such as grease is applied to the gap between the first stepped portion 213 and the second stepped portion 223. Therefore, the gap between the first side wall 211 and the second side wall 221 is sealed by the sealant, so that water is less likely to enter the housing 20 even if water splashes on the fitting surface.

When the first and

second housings

21 and 22 are assembled, the outer peripheral side of the second side wall portion 221 of the second housing 22 is covered by the second housing covering portion 212. As shown in fig. 6, the front end of the second housing covering portion 212 on the first direction Z side (+ Z direction) is closer to the first direction Z side (+ Z direction) than the first step portion 213. In the present embodiment, the front end of the second housing covering portion 212 on one side in the first direction Z (+ Z direction) extends to the position of the bottom plate portion 220 of the second housing 22, and therefore, the second side wall portion 221 is entirely covered by the second housing covering portion 212 from the outer peripheral side. As shown in fig. 5 and 6, a predetermined gap (for example, about 1 mm) is provided between the second side wall 221 and the second housing cover 212. Therefore, ease of assembly when the first housing 21 and the second housing 22 are assembled is good.

As shown in fig. 1 and 5, when the first housing 21 and the second housing 22 are assembled, the portion of the opening 23 formed by cutting the second housing covering portion 212 is blocked by the second side wall portion 221, but the portion formed by cutting the first side wall portion 211 is a penetrating portion penetrating the housing 20. Therefore, the wire 10 can be drawn out to the outside of the case 20 through the opening 23.

(Board)

As shown in fig. 2 and 5, the discharge valve driving device 1 includes a flat plate 13 disposed between the opening 23 and the pulley 11. The plate 13 is made of, for example, a polyester film. A through portion 14 is formed in the plate 13, and the wire 10 passes through the through portion 14. The wire 10 can move in the second direction Y in the through portion 14. Therefore, the wire 10 can be fed and wound in a state where the wire 10 passes through the through-hole 14.

The plate 13 is disposed in the vicinity of the opening 23 and faces the opening 23 in the second direction Y. The plate 13 is larger than the opening 23 and is disposed in a posture substantially perpendicular to the second direction Y. Therefore, the plate 13 functions as a shielding member for shielding water and foreign matter that attempt to enter the housing 20 through the opening 23. Further, a sealant such as a lubricating grease for sealing the gap between the wire 10 and the plate 13 is applied to the through portion 14.

(holding structure of plate)

The plate 13 is held by the housing 20 between the opening 23 and the pulley. The housing 20 is provided with a restricting portion 15 (see fig. 3 and 4), and the restricting portion 15 holds the plate 13 movably in a direction orthogonal to the second direction Y and restricts a moving range of the plate 13 in the direction orthogonal to the second direction Y. Since the wire 10 passes through the through portion 14 of the plate 13, the plate 13 functions as a guide member for guiding the wire 10. The restricting portion 15 restricts the moving range of the wire 10 via the plate 13 within a range not contacting each portion of the housing 20. In the present embodiment, the regulating portion 15 regulates the movement range of the wire 10 via the plate 13 to a range that does not contact the inner peripheral edge of the opening 23 and the end portion of the second side wall portion 221 in the-Z direction.

As shown in fig. 3 and 4, the regulating portion 15 includes a first housing-side regulating portion 16 formed in the first housing 21 and a second housing-side regulating portion 17 formed in the second housing 22. The first housing-side regulating portion 16 is a protruding portion protruding in the + Z direction from the upper plate portion 210 of the first housing 21, and includes a first groove 160 extending in the third direction X. The second housing-side regulating portion 17 is a protruding portion protruding in the-Z direction from the bottom plate portion 220 of the second housing 22, and includes a second groove portion 170 extending in the third direction X. Both the first casing-side regulating portion 16 and the second casing-side regulating portion 17 are provided in the vicinity of the opening 23.

As shown in fig. 5, when the first and

second housings

21 and 22 are assembled, the first and

second groove portions

160 and 170 are opposed to each other in the first direction Z. One end in the first direction Z (+ Z direction) of the plate 13 is disposed in the second groove 170, and the other end in the first direction Z (-Z direction) is disposed in the first groove 160. As shown in fig. 5, the interval between the bottom of the first groove 160 and the bottom of the second groove 170 is greater than the height of the plate 13 in the first direction Z. Therefore, the plate 13 is supported by the first groove 160 and the second groove 170, is movable in the first direction Z, and the range of movement in the first direction Z is restricted by the bottom of the first groove 160 and the bottom of the second groove 170. That is, the first groove 160 and the second groove 170 function as the first regulating portion 151 that regulates the movement range of the plate 13 in the first direction Z.

The first regulating portion 151 (the first groove portion 160 and the second groove portion 170) regulates the movement range of the wire 10 in the first direction Z via the plate 13 by regulating the movement range of the plate 13 in the first direction Z. In the present embodiment, the range of movement of the wire 10 to one side of the first direction Z (+ Z direction) is limited by bringing the plate 13 into contact with the bottom of the second groove portion 170 before the wire 10 comes into contact with the end of the second side wall portion 221 in the-Z direction. Further, the plate 13 is brought into contact with the bottom of the first groove 160 before the wire 10 is brought into contact with the edge of the opening 23 in the-Z direction, thereby restricting the range of movement of the wire 10 to the other side of the first direction Z (-Z direction).

As shown in fig. 4, the first housing-side regulating portion 16 includes a first wall 161 extending in the third direction X on the-Y direction side of the first groove 160, a second wall 162 extending in the third direction X on the + Y direction side of the first groove 160, and two third walls 163 extending while being bent in the-Y direction from one end and the other end of the second wall 162 in the third direction X. The third wall 163 extends in the third direction X from a position separated by a predetermined dimension from one end and the other end of the first groove 160 in the second direction Y, and is continuous with the first side wall 211.

Fig. 7 is a partial perspective view of the second housing 22, the pulley 11, the plate 13, and the wire 10 viewed from the other side (the-Z direction) of the first direction Z. As shown in fig. 3 and 7, the second casing-side regulating portion 17 includes: a first wall 171 extending in the third direction X on the-Y direction side of the second groove 170, a second wall 172 extending in the third direction X on the + Y direction side of the second groove 170, and two third walls 173 extending from one end and the other end of the second wall 172 in the third direction X and curving in the-Y direction. As shown in fig. 5, the first wall 171 and the second wall 172 are connected to each other on the + Z direction side of the second groove 170. The third wall 173 extends in the third direction X from a position separated by a predetermined dimension from one end and the other end of the second groove 170 in the second direction Y, and is connected to the second side wall 221.

As shown in fig. 4 and 5, the first housing-side regulating portion 16 protrudes from the upper plate portion 210 by a smaller dimension (height in the first direction Z) than the first side wall portion 211. On the other hand, as shown in fig. 7, the dimension (height in the first direction Z) by which the second housing-side restriction portion 17 protrudes from the bottom plate portion 220 is larger than the second side wall portion 221. A rectangular recess 18 recessed in the + Z direction is provided in the center of the second housing-side restriction portion 17 in the third direction X. The rectangular recess 18 is recessed to the same height as the front end of the second side wall portion 221 in the-Z direction. Therefore, when the first housing 21 and the second housing 22 are assembled, the second housing-side regulating portion 17 is in a state where portions on both sides of the rectangular recess 18 in the third direction X protrude to the inside of the first housing 21.

Rectangular recess 18 includes first rectangular recess 181 formed in first wall 171 and second rectangular recess 182 formed in second wall 172. As shown in fig. 7, when the plate 13 is attached to the second groove 170 of the second housing-side regulating portion 17, the penetrating portion 14 through which the wire 10 passes is disposed inside the rectangular recessed portion 18. The first wall 171 has two portions on one side and the other side in the third direction X of the first rectangular recess 181 extending in the-Y direction and connected to the second side wall 221.

When the first and

second housings

21 and 22 are assembled, the third wall 163 of the first housing-side confining portion 16 and the third wall 173 of the second housing-side confining portion 17 are opposed in the first direction Z. The interval in the third direction X between the two third wall portions 163 is the same as the interval in the third direction X between the two third wall portions 173, and is greater than the width in the third direction X of the plate 13. Therefore, when the both ends of the plate 13 in the first direction Z are disposed in the first groove 160 and the second groove 170, the third wall 163 and the third wall 173 regulate the movement range of the plate 13 in the third direction X. That is, the

third wall portions

163 and 173 function as the second regulating portion 152 that regulates the movement range of the plate 13 in the third direction X.

The second regulating portion 152 (the third wall portion 163 and the third wall portion 173) regulates the movement range of the plate 13 in the third direction X, and regulates the movement range of the wire 10 in the third direction X via the plate 13. In the present embodiment, the range of movement of the wire 10 to the one side in the third direction X (+ X direction) is limited by bringing the plate 13 into contact with the third wall portion 163 and the third wall portion 173 before the wire 10 comes into contact with the edge in the + X direction of the opening 23. Further, the range of movement of the wire 10 to the other side of the third direction X (the (-X direction)) is restricted by bringing the plate 13 into contact with the third wall portion 163 and the third wall portion 173 before the wire 10 comes into contact with the edge of the opening 23 in the-X direction.

Further, as the second limiting portion 152, either the third wall portion 163 or the third wall portion 173 may be provided. Even if one of the third wall 163 and the third wall 173 is used, the movement range of the plate 13 in the third direction X can be limited. Therefore, the movement range of the wire 10 in the third direction X can be restricted via the plate 13.

(wire position regulating part)

As shown in fig. 7, the second housing 22 includes a wire position regulating portion 19 that protrudes in the-Z direction from the bottom plate portion 220 between the second housing-side regulating portion 17 and the pulley 11. In the present embodiment, the wire position regulating portion 19 is a wall extending linearly in the second direction Y, and is connected to the second wall portion 172 of the second housing-side regulating portion 17 on the + X direction side of the rectangular recessed portion 18. Therefore, the wire position regulating portion 19 is disposed on the + X direction side of the wire 10.

Fig. 8 is an explanatory diagram schematically showing the arrangement of the pulley 11 and the wire position regulating portion 19 as viewed from the opening portion 23 side (i.e., the-Y direction). As described above, the wire 10 is disposed in the groove 12 provided in the pulley 11. The groove 12 is a groove having a substantially V-shaped cross section that opens on the outer peripheral surface of the pulley 11 and increases in opening width in the first direction Z toward the outer peripheral side.

As shown in fig. 8, a gap S in the third direction X exists between the wire position regulating portion 19 and the outer peripheral surface of the pulley 11, but the gap S is smaller than the wire diameter D. That is, the wire position regulating portion 19 is disposed at a position satisfying the condition of S < D.

Since the wire position regulating portion 19 is disposed on the + X direction side of the wire 10 from the groove 12 of the pulley 11 toward the opening portion 23, the movement of the wire 10 in the + X direction is regulated by the wire position regulating portion 19. Therefore, even if the wire 10 is pulled in the + X direction outside the opening 23 and the drawing direction of the wire 10 is inclined in the + X direction, the wire 10 does not move from the wire position regulating portion 19 to the + X direction side. Therefore, if the gap S in the third direction X between the wire position regulating portion 19 and the outer peripheral surface of the pulley 11 is set smaller than the wire diameter D, the wire 10 does not completely fall off from the groove 12 even if the drawing direction of the wire 10 is inclined toward the + X direction. Therefore, the wire material position regulating portion 19 is provided, so that the wire material 10 can be prevented from falling off the pulley 11.

(main effect of the utility model)

As described above, the drain valve driving device 1 of the present embodiment includes the wire 10 connected to the drain valve, the pulley 11 connected to the wire 10, the motor 40 and the gear unit 2 that drive the pulley 11, and the case 20 that houses the pulley 11, the motor 40, and the gear unit 2. The housing 20 includes an opening 23 for drawing the wire 10 to the outside, and a wire position regulating portion 19 for regulating the position of the wire 10 between the opening 23 and the pulley 11, and a gap S between the wire position regulating portion 19 and the pulley 11 is smaller than the wire diameter D when viewed in a direction (+ Y direction) from the opening 23 toward the pulley 11.

In the present embodiment, since the wire position regulating portion 19 is provided at a position where the gap S with the pulley 11 is smaller than the wire diameter D (the diameter of the wire) when viewed from the opening portion 23 side as described above, the position of the wire 10 can be regulated so as to move only within a range where the wire does not fall off from the pulley 11. Therefore, even if the drawing direction of the wire 10 is changed, the wire 10 does not move to a position where it drops off from the pulley 11. Therefore, it can be avoided that the wire 10 falls off the pulley 11 and the water discharge valve cannot be opened and closed.

In the present embodiment, the wire position regulating portion 19 can regulate the range of movement of the wire 10 to the side (+ X direction) where the wire position regulating portion 19 is located, to a range where the edge of the opening portion 23 does not contact the wire 10. That is, the wire position regulating portion 19 is disposed at the following positions: when the wire 10 moves in the + X direction, the wire position regulating portion 19 is brought into contact with the wire 10 before the wire 10 comes into contact with the + X direction edge of the opening portion 23. Therefore, by providing the wire position regulating portion 19, damage to the wire 10 due to contact between the housing 20 and the wire 10 can be avoided.

In the present embodiment, the wire position regulating portion 19 is a wall extending in the direction (+ Y direction) from the opening portion 23 toward the pulley 11. By providing the continuous wall in this way, the strength of the wire position regulating portion 19 can be increased. Further, since the wire 10 can be guided by the surface, disconnection of the wire 10 due to contact with the wire position regulating portion 19 is less likely to occur.

Further, the shape of the wire position regulating portion 19 is not limited to the wall. For example, by providing a projection projecting from the bottom plate portion 220 at one or a plurality of positions, the position of the wire 10 can be regulated in the same manner as the wall-shaped wire position regulating portion 19.

In the present embodiment, the wire 10 passes through the through portion 14 of the plate 13 and is held by the plate 13. The case 20 is configured by assembling a first case 21 and a second case 22 facing each other in the first direction Z, and the wire 10 is drawn out to the outside of the case 20 through a space between an opening 23 formed by cutting out the first side wall portion 211 of the first case 21 and the second side wall portion 221 of the second case 22. The second housing 22 includes a second housing-side regulating portion 17 provided on the second housing 22 side in a regulating portion 15 for regulating the movement of the plate 13 disposed between the opening 23 and the pulley 11, the second housing-side regulating portion 17 includes a second wall portion 172 extending in a third direction X intersecting the second direction Y from the opening 23 toward the pulley 11 and intersecting the first direction Z, and the wire position regulating portion 19 extends from the second wall portion 172 toward the pulley 11 and is disposed at a position for regulating the position of the wire 10 in the third direction X. With this configuration, the movement of the wire 10 can be regulated via the plate 13. Further, between the second housing-side regulating portion 17 and the pulley 11, the position of the wire 10 can be regulated by the wall-shaped wire position regulating portion 19. Therefore, it is possible to avoid contact of the wire 10 and the housing 20, and to avoid the wire 10 from moving to a position where it drops off from the pulley 11.

In the present embodiment, even if water and foreign matter enter through the opening 23, the plate 13 can prevent the water and foreign matter from entering the pulley 11, the motor 40, and the gear unit 2. Therefore, malfunction of the motor 40 and the gear unit 2 due to intrusion of water and foreign matter can be suppressed.

In the present embodiment, the through portion 14 is a through hole penetrating the center of the plate 13, but the through portion 14 may be a notch-shaped groove extending from the outer peripheral edge of the plate 13 to the center of the plate 13. When the through-portion 14 is a groove, the operation of passing the wire 10 is easily performed. Therefore, ease of assembly can be improved.

In the present embodiment, the drain valve driving member connected to the drain valve is a wire, and the output member connected to the wire 10 is a pulley 11. In this way, by using the flexible wire 10 as the drain valve driving member, the direction in which the wire 10 is drawn can be changed within a range not contacting the opening portion 23. Therefore, the degree of freedom in the arrangement of the water discharge valve drive device 1 is improved. In addition, even if the positional accuracy when fixing the drain valve driving device 1 is low, the drain valve can be opened and closed via the wire 10.

Claims

1. A drain valve driving device characterized by comprising:

the wire is connected with the drain valve;

a pulley connected to the wire;

a driving part that drives the pulley; and

a housing that houses the pulley and the driving portion,

the housing includes:

an opening portion for drawing the wire rod to the outside; and

a wire position regulating portion that regulates a position of the wire between the opening portion and the pulley,

the gap between the wire position regulating portion and the pulley is smaller than the diameter of the wire as viewed from the opening portion toward the pulley.

2. The driving apparatus for drain valve according to claim 1,

the wire position limiting portion limits a moving range of the wire to a side where the wire position limiting portion is located within a range where an edge of the opening portion does not contact the wire.

3. The driving apparatus for drain valve according to claim 1 or 2,

the wire position regulating portion is a wall extending in a direction from the opening portion toward the pulley.

4. The drain valve driving apparatus according to claim 3,

a plate having a through-hole for passing the wire rod therethrough,

the housing includes a first housing and a second housing opposed to each other in a first direction,

the first case includes a first side wall portion, the opening is a cutout portion formed by cutting the first side wall portion, the wire is drawn out to the outside of the case through a gap between the cutout portion and the second case,

the second housing includes a regulating portion that regulates movement of the plate disposed between the opening portion and the pulley,

the regulating portion extends in a third direction that intersects with a second direction from the opening portion toward the pulley and intersects with the first direction,

the wire position regulating portion extends from the regulating portion toward the pulley side, and regulates a position of the wire in the third direction.