CN110220035B

CN110220035B - Drain valve driving device

Info

Publication number: CN110220035B
Application number: CN201810175829.3A
Authority: CN
Inventors: 金营科; 有贺久刚
Original assignee: Nidec Sankyo Electronics Dongguan Corp; Nidec Sankyo Corp
Current assignee: Nidec Sankyo Electronics Dongguan Corp; Nidec Sankyo Corp
Priority date: 2018-03-02
Filing date: 2018-03-02
Publication date: 2024-04-12
Anticipated expiration: 2038-03-02
Also published as: CN110220035A; KR20190104891A

Abstract

A drain valve driving device is beneficial to reducing the manufacturing cost. In the drain valve driving device of the present invention, driving force of a driving source is transmitted to a valve core through a clutch wheel and a driving wheel of an output clutch mechanism, a rotary output member and a pulling member, a linkage braking mechanism and a switching limit mechanism control the output clutch mechanism so that the driving force of the driving source is not transmitted to the valve core any more after the valve core is shifted from an initial position to an operating position, and the valve core, the pulling member and the rotary output member are kept in a state when the valve core is at the operating position, the switching limit mechanism comprises a switching limit lever rotating with the rotary output member and a force applying member applying a force for separating the driving wheel from the clutch wheel, the switching limit lever integrally has a switching part and a limit part, the switching part makes the driving wheel engage with the clutch wheel when the valve core is at the initial position and makes the driving wheel shift to a position separated from the clutch wheel when the valve core shifts to the operating position, and the limit part limits the driving wheel to reverse rotation when the valve core shifts to the operating position.

Description

Drain valve driving device

Technical Field

The present invention relates to a drain valve driving device.

Background

Patent document 1 discloses a drain valve driving device including a main component such as a valve element, a pulling member, a traction member, a rotation driving member, an output clutch mechanism, a linkage brake mechanism, and a drain valve control motor, wherein a driving force output from the drain valve control motor is transmitted to the valve element via the rotation driving member, the output clutch mechanism, the traction member, and the pulling member, and after the valve element is drive-shifted from an initial position to an operation position, the driving force of a driving source is no longer transmitted to the valve element by the operation of the linkage brake mechanism and the output clutch mechanism, and the valve element, the pulling member, and the rotation output member are held in a state when the valve element is in the operation position.

Patent document 1: CN104264423A

However, in the above-described drain valve driving device, after the valve element is driven and displaced from the initial position to the operating position, in order to prevent the driving force of the driving source from being transmitted to the valve element and to maintain the valve element, the pulling member, and the traction member in the state when the valve element is in the operating position, it is necessary to provide a limit clutch, a clutch disc, a clutch check wheel, and a clutch check lever in the output clutch mechanism, move the clutch disc by the limit clutch to release the engagement state between the clutch disc and the clutch check wheel, and rotate the clutch check lever by the limit clutch to a position preventing the reverse rotation of the clutch check wheel. That is, in the above-described drain valve driving device, after the valve element is driven and displaced from the initial position to the operating position, in order to prevent the driving force of the driving source from being transmitted to the valve element and to maintain the valve element, the pulling member, and the traction member in the state when the valve element is in the operating position, it is necessary to realize the function of moving the clutch disc and the function of preventing the reverse rotation of the clutch check wheel by different members, respectively, and therefore, there are many parts and high manufacturing costs.

Disclosure of Invention

The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a drain valve driving device that contributes to reduction in manufacturing cost.

In order to achieve the above object, the present invention provides a drain valve driving device including a driving source, an output clutch mechanism, a linked brake mechanism, a switching limit mechanism, a rotary output member, a pulling member, and a valve spool, wherein a driving force of the driving source is sequentially transmitted to the valve spool via a clutch wheel and a driving wheel included in the output clutch mechanism, the rotary output member, and the pulling member, and the output clutch mechanism is controlled by the linked brake mechanism and the switching limit mechanism, so that after the valve spool is displaced from an initial position to an actuated position, the driving force of the driving source is not transmitted to the valve spool, and the valve spool, the pulling member, and the rotary output member are held in a state in which the valve spool is in the actuated position, wherein the switching limit mechanism includes a switching limit lever and a biasing member, the switching limit lever rotates with the rotary output member, the biasing member applies a biasing force for separating the clutch wheel from the driving wheel in a direction of a rotation axis of the driving wheel and the clutch wheel, the switching limit lever integrally has a switching portion and a limit portion, and the switching limit portion is provided so that when the valve spool is displaced from an initial position to an actuated position, and the switching limit portion is set to an actuated position, and when the switching limit portion is displaced from the driving wheel to the initial position to the clutch wheel is set to the position, and the switching limit portion is engaged to the clutch position when the switching limit portion is displaced from the clutch wheel to the position.

Here, the "reverse rotation of the transmission wheel" means that the transmission wheel rotates in a direction opposite to the rotation direction of the transmission wheel when the driving force of the driving source is transmitted to the transmission wheel.

According to the drain valve driving device of the present invention, when the valve body is driven and displaced from the initial position to the operating position, in order to prevent the driving force of the driving source from being transmitted to the valve body and to maintain the valve body, the pulling member and the rotary output member in the state when the valve body is in the operating position, it is not necessary to separately realize the function of moving the clutch disc and the function of preventing the reverse rotation of the clutch check wheel by using different members as in the conventional art, and only the operation of the transmission wheel needs to be controlled by using one member, i.e., the switching stopper rod integrally provided with the switching portion and the stopper portion, and therefore, the structure of the drain valve driving device is simplified, and the manufacturing cost is reduced.

In the drain valve driving device of the present invention, preferably, the transmission wheel includes: a shaft portion extending in the rotation axis direction; and a disk portion that extends radially outward from the shaft portion, wherein an engagement claw that engages with and disengages from the clutch wheel is provided at an outer peripheral edge of the disk portion.

According to the drain valve driving device, the clamping claw is arranged on the outer periphery of the disc-shaped part of the driving wheel, so that impact force applied to the clamping claw when being clamped with the clutch wheel is reduced, abrasion of the clamping claw is delayed, and the service life of the driving wheel is prolonged.

In the drain valve driving device of the present invention, preferably, the transmission wheel includes: a shaft portion extending in the rotation axis direction; and a disk portion that extends radially outward from the shaft portion, wherein a locking piece that locks the stopper portion when the valve body is displaced to an operating position is provided at an outer peripheral edge of the disk portion.

According to the drain valve driving device, the locking piece is arranged on the outer periphery of the disc-shaped part of the driving wheel, so that impact force applied to the locking piece when the locking piece is locked with the limiting part of the switching limiting rod is reduced, abrasion of the locking piece is delayed, and the service life of the driving wheel is prolonged.

In the drain valve driving device of the above configuration, the following configuration may be adopted: the locking piece protrudes toward a side opposite to the clutch wheel.

According to the drain valve driving device of the present invention, the locking piece is formed to protrude toward the opposite side to the clutch wheel, so that the position-restricting portion of the switch position-restricting lever is easily locked with the locking piece when the valve element is displaced to the operating position.

In the drain valve driving device of the present invention, preferably, the output clutch mechanism includes a planetary gear mechanism including: the drive wheel having a sun gear portion; a planetary gear meshed with the sun gear portion; a planetary carrier connected to the rotary output member; and a ring gear meshed with the planetary gear and controlled by the linkage brake mechanism.

In the drain valve driving device of the above configuration, the following configuration may be adopted: the transmission wheel comprises: a shaft portion extending in the rotation axis direction and penetrating the clutch wheel; a sun gear portion provided on one end side of the shaft portion, the one end side being closer to the clutch wheel than the shaft portion; and a disk portion that is provided on the other end side of the shaft portion, which is closer to the other end side of the shaft portion than the clutch wheel, and that extends radially outward from the shaft portion, wherein the clutch wheel engages with and disengages from the disk portion, and wherein the stopper portion abuts against the disk portion to restrict the transmission wheel from reversing when the valve body is displaced to the operating position.

In the drain valve driving device of the above configuration, the following configuration may be adopted: the outer peripheral edge of the disk-shaped portion is provided with a locking claw which is engaged with and disengaged from the clutch wheel and protrudes toward the clutch wheel, and the outer peripheral edge of the disk-shaped portion is provided with a locking piece which is locked by the limiting portion when the valve element is displaced to the operating position and protrudes toward the side opposite to the clutch wheel.

According to the drain valve driving device with the structure, the clamping claw and the clamping piece are arranged on the outer periphery of the disc-shaped part of the driving wheel, so that impact force applied to the clamping claw and the clamping piece when the clamping claw and the clamping piece are clamped with the clutch wheel is reduced, abrasion of the clamping claw and the clamping piece is delayed, and the service life of the driving wheel is prolonged.

In the drain valve driving device according to the present invention, it is preferable that the drain valve driving device includes a support shaft that supports the clutch wheel and the transmission wheel, and the switching lever includes a groove portion or a hole portion into which the support shaft is inserted.

According to the drain valve driving device with the structure, the groove part or the hole part can be used for positioning the switching limiting rod during assembly, so that the assembly efficiency is improved.

In the drain valve driving device according to the present invention, the biasing member is preferably a compression coil spring provided between the clutch wheel and the transmission wheel.

According to the drain valve driving device with the above structure, the structure of the force application member is simple, which contributes to reduction of manufacturing cost.

(effects of the invention)

According to the present invention, when the valve body is displaced from the initial position to the operating position, in order to prevent the driving force of the driving source from being transmitted to the valve body and to maintain the valve body, the pulling member, and the rotary output member in the state when the valve body is in the operating position, it is not necessary to separately realize the function of moving the clutch disc and the function of preventing the reverse rotation of the clutch check wheel by different members as in the conventional art, and only the operation of the transmission wheel needs to be controlled by one member, i.e., the switching stopper rod integrally provided with the switching portion and the stopper portion, and therefore, the structure of the drain valve driving device is simplified, contributing to the reduction of the manufacturing cost.

Drawings

Fig. 1 is a perspective view schematically showing a drain valve driving device according to an embodiment of the present invention, wherein a part of a housing is omitted.

Fig. 2 is a side sectional view schematically showing a partial structure of the drain valve driving device according to the embodiment of the present invention, and shows a state where the clutch wheel and the transmission wheel of the output clutch mechanism are engaged with each other.

Fig. 3 is a perspective view schematically showing a partial structure of the drain valve driving device according to the embodiment of the present invention, and shows a state where the clutch wheel and the transmission wheel of the output clutch mechanism are engaged with each other.

Fig. 4 is another perspective view schematically showing a partial structure of the drain valve driving device according to the embodiment of the present invention.

Fig. 5 is a sectional view schematically showing a partial structure of a drain valve driving apparatus according to an embodiment of the present invention, and shows a state where a clutch wheel and a transmission wheel of an output clutch mechanism are separated from each other.

Fig. 6 is a perspective view schematically showing a partial structure of the drain valve driving device according to the embodiment of the present invention, and shows a state where the clutch wheel and the transmission wheel of the output clutch mechanism are separated from each other.

Fig. 7 is a perspective view schematically showing a partial structure of a drain valve driving device according to a modification of the present invention.

(symbol description)

1. Outer casing

12. Second housing

3. Output clutch mechanism

31. Clutch wheel

311. Shaft sleeve part

312. Disk-shaped part

313. Peripheral wall part

32. Driving wheel

321. Sun gear part

322. Shaft portion

323. Disk-shaped part

3231. Locking claw

3232. Locking piece

33. Planetary gear

34. Planet gear carrier

341. Shaft portion

3411. Pinion gear part

342. Disk-shaped part

35. Gear ring

351. Shaft sleeve part

352. Disk-shaped part

3521. Peripheral tooth portion

353. Peripheral wall part

4. Linkage braking mechanism

41. Linkage part

42. Braking part

421. Brake wheel

4211. Sector gear

4212. Braking part

422. Transition member

4221. Control sheet

4222. Gear part

5. Switching limiting mechanism

51. Switching limiting rod

511. Switching part

512. Limiting part

513. Hole part

514. Protruding part

52. Force application member

6. Rotary output member

61. Gear part

62. Pulley part

7. Pulling member

8. Valve core

9. Power supply terminal

SS1 supporting axle

SS2 supporting axle

SS3 supporting axle

TG transition gear

Detailed Description

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

First, a structure of a drain valve driving device according to an embodiment of the present invention will be described with reference to fig. 1 to 6, in which fig. 1 is a perspective view schematically showing a part of a drain valve driving device according to an embodiment of the present invention, in which illustration a part of a housing is omitted, fig. 2 is a side sectional view schematically showing a partial structure of the drain valve driving device according to an embodiment of the present invention, and showing a state when a clutch wheel and a transmission wheel of an output clutch mechanism are engaged with each other, fig. 3 is a perspective view schematically showing a partial structure of the drain valve driving device according to an embodiment of the present invention, and showing a state when a clutch wheel and a transmission wheel of an output clutch mechanism are engaged with each other, fig. 4 is another perspective view schematically showing a partial structure of the drain valve driving device according to an embodiment of the present invention, fig. 5 is a sectional view schematically showing a partial structure of the drain valve driving device according to an embodiment of the present invention, and showing a state when a clutch wheel and a transmission wheel of an output clutch mechanism are separated from each other, and fig. 6 is a perspective view schematically showing a partial structure of a drain valve driving device according to an embodiment of the present invention.

For convenience of explanation, the three directions intersecting each other will be described as an X direction, a Y direction, and a Z direction, and one side in the Z direction will be referred to as a Z1 direction, and the other side in the Z direction will be referred to as a Z2 direction.

< integral Structure of Drain valve drive device >

As shown in fig. 1, the drain valve driving device includes a driving source, an output clutch mechanism 3, a interlock brake mechanism 4, a switching limit mechanism 5 (see fig. 2), a rotary output member 6, a pulling member 7, and a valve element 8, wherein a driving force of the driving source is sequentially transmitted to the valve element 8 via a clutch wheel 31 and a transmission wheel 32 (see fig. 2) included in the output clutch mechanism 3, the rotary output member 6, and the pulling member 7, and the output clutch mechanism 3 is controlled by the interlock brake mechanism 4 and the switching limit mechanism 5 so that the driving force of the driving source is not transmitted to the valve element 8 any more after the valve element 8 is switched from an initial position to an operating position, and the valve element 8, the pulling member 7, and the rotary output member 6 are maintained in a state when the valve element 8 is in the operating position.

Here, the drive source, the output clutch mechanism 3, the interlocking brake mechanism 4, the switching limiting mechanism 5, and the rotary output member 6 are housed in the housing 1.

< Structure of housing >

As shown in fig. 1, the housing 1 includes a first housing and a second housing 12, not shown, and the first housing and the second housing 12 are assembled in the Z direction in fig. 1 and are connected together by screws (not shown), so that a space for accommodating the drive source, the output clutch mechanism 3, the interlocking brake mechanism 4, the switching stopper mechanism 5, and the rotary output member 6 is formed between the first housing and the second housing 12. Specifically, the first housing has a top wall perpendicular to the Z direction and a side wall rising from the peripheral edge of the top wall toward one side of the second housing, the second housing 12 has a bottom wall perpendicular to the Z direction and a side wall rising from the peripheral edge of the bottom wall toward one side of the first housing, and a space for accommodating the drive source, the output clutch mechanism 3, the interlocking brake mechanism 4, the switching limit mechanism 5, and the rotary output member 6 is defined by the top wall and the side wall of the first housing, the bottom wall and the side wall of the second housing 12. The housing 1 further includes a terminal block 123, and the terminal block 123 supports the power supply terminal 9 electrically connected to the drive source.

< Structure of drive Source >

Here, the driving source is a motor having a stator and a rotor, wherein the rotor has a rotating shaft and a magnet fixed to the rotating shaft, and a pinion (not shown) is provided at one end (upper end in fig. 1) of the rotating shaft, the pinion is engaged with a clutch wheel 31 included in the output clutch mechanism 3, and the stator has a coil electrically connected to the power supply terminal 9.

< Structure of output Clutch mechanism >

As shown in fig. 2, the output clutch mechanism 3 includes a clutch wheel 31 and a planetary gear mechanism. The clutch wheel 31 has: a boss portion 311, the boss portion 311 being fitted over a shaft portion 322 of the transmission wheel 32 and a boss portion 351 of the ring gear 35; a disk portion 312, the disk portion 312 extending radially outward from the boss portion 311 (in the illustrated example, extending radially outward from an upper end of the boss portion 311, but not limited thereto); and a peripheral wall portion 313, the peripheral wall portion 313 rising from an outer peripheral edge of the disk portion 312 (in the illustrated example, rising in the Z2 direction, but not limited thereto). And, the planetary gear mechanism includes: a transmission wheel 32 having a sun gear portion 321; a planetary gear 33 meshed with the sun gear portion 321 (the number of planetary gears 33 may be appropriately set as needed); a carrier 34 connected to the rotary output member 6 (in the illustrated example, connected to the rotary output member 6 via a transition gear TG, but not limited thereto); and a ring gear 35 meshed with the planetary gear 33 and controlled by the interlocking brake mechanism 4.

Here, the carrier 34 includes a shaft portion 341 and a disk portion 342, wherein the shaft portion 341 includes a pinion portion 3411 (in the illustrated example, the pinion portion 3411 is provided at an upper end of the shaft portion 341, but not limited thereto), and the disk portion 342 extends radially outward from the shaft portion 341 (in the illustrated example, extends radially outward from a lower end of the shaft portion 341, but not limited thereto). The ring gear 35 includes a boss portion 351, a disk portion 352, and a peripheral wall portion 353, wherein the boss portion 351 is fitted over the shaft portion 322 of the transmission wheel 32, the disk portion 352 extends radially outward from the boss portion 351, an outer peripheral tooth portion 3521 is provided on an outer peripheral surface of the disk portion 352, and the peripheral wall portion 353 stands up in the vicinity of an outer peripheral edge of the disk portion 352. The carrier 34 and the ring gear 35 define a space for accommodating the planetary gear 33.

As shown in fig. 2, the rotation axis direction of the transmission wheel 32 is the same as the rotation axis direction of the clutch wheel 31. The transmission wheel 32 includes, in addition to the sun gear portion 321, a shaft portion 322 and a disk portion 323, wherein the shaft portion 322 extends in the rotation axis direction of the transmission wheel 32 and penetrates the clutch wheel 31, the sun gear portion 321 is provided at a position of the shaft portion 322 on one end side (Z1 direction side) of the shaft portion 322 than the clutch wheel 31, the disk portion 323 is provided at a position of the shaft portion 322 on the other end side (Z2 direction side) of the shaft portion 322 than the clutch wheel 31, and the shaft portion 322 expands radially outward, and the transmission wheel 32 engages with and disengages from the clutch wheel 31 at an outer peripheral edge of the disk portion 323.

Here, in the transmission wheel 32, an engagement claw 3231 that engages with and disengages from the clutch wheel 31 is provided at the outer peripheral edge of the disc-shaped portion 323, the engagement claw 3231 protrudes toward the clutch wheel 31, and an engagement piece 3232 that engages with a below-described stopper portion 512 of the switching stopper mechanism 5 when the valve body 8 is displaced to the operating position is provided at the outer peripheral edge of the disc-shaped portion 323, the engagement piece 3232 protruding toward the opposite side (Z2 direction side) from the clutch wheel 31.

The housing 1 is provided with a support shaft SS1, and the support shaft SS1 supports the clutch wheel 31 and the transmission wheel 32. Specifically, the support shaft SS1 extends in the rotation axis direction of the clutch wheel 31 and the transmission wheel 32, one end of the support shaft SS1 is supported by the first housing, the other end of the support shaft SS1 is supported by the second housing 12, and the support shaft SS1 penetrates through the centers of the shaft portion 322 of the transmission wheel 32 and the shaft portion 341 of the carrier 34, and is inserted into a hole 513 of the switching stopper 51 included in the switching stopper 5.

< Structure of linkage brake mechanism >

As shown in fig. 1, the interlocking brake mechanism 4 includes an interlocking portion 41 and a brake portion 42.

The interlocking portion 41 adopts the same structure as the interlocking member in patent document 1 mentioned in the background art portion. Specifically, the interlocking portion 41 adopts a magnetic induction type master-slave structure including a first portion and a second portion rotatable about the same rotation axis (in the illustrated example, the first portion and the second portion are supported by a support shaft SS4 parallel to the support shaft SS1, one end of the support shaft SS4 is supported by the first housing, the other end of the support shaft SS4 is supported by the second housing 12), the first portion is engaged with a pinion provided at one end of a rotation shaft included in the drive source, for example, through a transition gear (not illustrated), and when the first portion rotates at high speed, the second portion rotates with the effect of a magnetic induction force. More specifically, the first portion includes a magnetic steel wheel and a magnetic steel shaft tooth between which a torsion spring is connected, the magnetic steel shaft tooth transmitting the driving force of the driving source to the magnetic steel wheel, and the second portion includes a sensing piece having a circular top plate portion and a cylindrical side wall portion integrally formed and accommodating the magnetic steel wheel, and the sensing piece and the magnetic steel wheel rotate about the same support shaft (support shaft SS4 in the illustrated example) as the center, forming a small fixed gap between the magnetic steel wheel and the sensing piece.

The brake portion 42 adopts the same structure as the brake member and the rotation balance member in patent document 1 mentioned in the background art portion. Specifically, the brake portion 42 includes a brake wheel 421, a return elastic member (e.g., a spring, not shown), and a transitional member 422, wherein the brake wheel 421 is rotatably supported by a support shaft SS3 (which is parallel to the support shaft SS1 and has one end supported by the first housing and the other end supported by the second housing), is driven by a second portion (a sensing member) of the linkage portion 41 (in the illustrated example, the brake wheel 421 is connected to the second portion via the transitional gear, but not limited thereto), and is composed of a sector gear 4211 and a brake portion 4212 integrally provided to the sector gear, the transitional member 422 has a control piece 4221, the brake portion 4212 is aligned with the control piece 4221, and the transitional member 422 is prevented from rotating when the brake portion 4212 is in contact with the control piece 4221.

Here, the transition member 422 further has a gear portion 4222, and the gear portion 4222 meshes with an outer peripheral tooth portion 3521 of the ring gear 35 included in the planetary gear mechanism of the output clutch mechanism 3.

< Structure of switching Limit mechanism >

As shown in fig. 2, the switching limiting mechanism 5 includes a switching limiting lever 51 and a biasing member 52, wherein the switching limiting lever 51 rotates with the rotary output member 6, and the biasing member 52 applies a biasing force to separate the driving wheel 32 from the clutch wheel 31 in the rotation axis direction of the clutch wheel 31 and the driving wheel 32.

As shown in fig. 3, the switching stopper rod 51 integrally includes a switching portion 511 and a stopper portion 512, wherein the switching portion 511 is configured to engage the transmission wheel 32 with the clutch wheel 31 against the urging force of the urging member 52 when the valve body 8 is in the initial position, and to displace the transmission wheel 32 from the position engaged with the clutch wheel 31 to the position separated from the clutch wheel 31 by the urging force of the urging member 52 when the valve body 8 is displaced to the operating position, and the stopper portion 512 is configured to restrict the transmission wheel 32 from reversing when the valve body 8 is displaced to the operating position.

As shown in fig. 1, a support shaft SS2 parallel to the support shaft SS1 is provided in the housing 1, and the support shaft SS2 supports the switching lever 51. Specifically, one end of the support shaft SS2 is supported by the first housing, the other end of the support shaft SS2 is supported by the second housing 12, the switching lever 51 is rotatably supported by the support shaft SS2 around the support shaft SS2, and the support shaft SS2 also supports a transition gear TG described below.

As shown in fig. 3 and 4, the switching stopper rod 51 includes a first plate portion 51A, a second plate portion 51B, and a connecting portion 51C, the first plate portion 51A and the second plate portion 51B extending in a direction perpendicular to the Z direction so as to be parallel to each other and offset in the Z direction, the connecting portion 51C connecting the first plate portion 51A and the second plate portion 51B together, the first plate portion 51A having an insertion hole into which the support shaft SS2 is inserted, a switching portion 511 and a hole 513 into which the support shaft SS1 is inserted being formed at a position of the first plate portion 51A away from the rotation center of the switching stopper rod 51, wherein the switching portion 511 is a cam portion protruding from the first plate portion 51A toward the Z1 direction, the hole 513 penetrates the first plate portion 51A in the Z direction, and a stopper portion 512 and a protrusion portion 514 are formed at a position of the second plate portion 51B away from the rotation center of the switching stopper rod 51, wherein the stopper portion 512 is constituted by an outer peripheral surface of the second plate portion 51B, the protrusion portion 514 protrudes from the second plate portion 51B toward the Z1 direction and is inserted into a stopper groove portion formed on the rotation output member 6, so that the switching stopper rod 51 rotates with the rotation output member 6 when the rotation output member 6 rotates, and the stopper portion 512 and the protrusion portion 514 are formed at different positions of the second plate portion 51B, and the stopper portion 512 abuts against the disc portion 323 of the transmission wheel 32 to restrict the transmission wheel 32 from reversing when the valve body 8 is displaced to the operation position.

The urging member 52 is a compression coil spring provided between the clutch wheel 31 and the transmission wheel 32.

< Structure of rotation output Member and pulling Member >

The rotation output member 6 includes a gear portion 61 and a pulley portion 62, wherein the gear portion 61 is engaged with a pinion portion 3411 provided in a shaft portion 341 of the carrier 34, for example, by a transition gear TG, and an outer periphery of the pulley portion 62 is formed with a receiving groove in which the pulling member 7 is received.

The pulling member 7 is a wire, one end of the pulling member 7 is engaged with the rotary output member 6, for example, and the other end of the pulling member 7 is connected to the valve body 8.

< operation of Drain valve drive device >

In a state where the valve body 8 is at the initial position, as shown in fig. 2 and 3, the switching portion 511 of the switching lever 51 causes the transmission wheel 32 to engage with the clutch wheel 31 against the urging force of the urging member 52.

In the above state, when the drive source is supplied with power, the drive force of the drive source is transmitted to the first portion of the linking portion 41 via the transition gear or the like, for example, to rotate the first portion at a high speed, whereby the second portion is rotated by the electromagnetic action, and the brake wheel 421 is rotated, so that the brake portion 4212 of the brake wheel 421 is brought into contact with the control piece 4221 (at this time, the first portion is brought into the idling state), the transition member 422 is prevented from rotating, and the ring gear 35 of the output clutch mechanism 3 is prevented from rotating.

On the other hand, the driving force of the driving source is transmitted to the driving wheel 32 via the clutch wheel 31 and then to the planetary gear 33 engaged with the sun gear portion 321 of the driving wheel 32, and at this time, since the rotation of the ring gear 35 of the output clutch mechanism 3 is prevented, the planetary carrier 34 rotates, thereby rotating the transition gear TG engaged with the pinion portion 3411 of the planetary carrier 34 and further rotating the rotary output member 6 engaged with the transition gear TG, and the pulling member 7 is wound around the pulley portion 62 of the rotary output member 6, so that the valve element 8 is driven to be displaced to the operating position, and the valve is opened.

When the valve body 8 is driven and displaced to the operating position, as shown in fig. 5 and 6, the switching portion 511 of the switching stopper rod 51 displaces the transmission wheel 32 from the position where it engages with the clutch wheel 31 to the position where it is separated from the clutch wheel 32, whereby the driving force of the driving source is no longer transmitted to the valve body 8.

On the other hand, when the spool 8 is displaced to the operating position, as shown in fig. 5 and 6, the stopper 512 abuts against the locking piece 3232 of the driving wheel 32 to restrict the reverse rotation of the driving wheel 32, and the driving force of the driving source is continuously transmitted to the first portion of the interlocking portion 41, and the second portion continuously contacts the brake portion 4212 of the brake wheel 421 with the control piece 4221 by the magnetic force, thereby preventing the transition member 422 from rotating, and preventing the ring gear 35 of the output clutch 3 from rotating, whereby the carrier 34 can be locked, and the spool 8, the pulling member 7, and the rotary output member 6 can be held in the state when the spool 8 is in the operating position.

When the power supply to the drive source is stopped, the valve element 8 starts to perform the return operation to the initial position by the return force provided by itself, and at this time, the first portion of the linkage portion 41 stops rotating, and the magnetic induction force between the first portion and the second portion disappears, so that the brake wheel 421 releases the restraint on the transition member 422 by the return elastic member of the brake portion 42, and the ring gear 35 of the output clutch 3 is in a freely rotatable state, whereby the valve element 8 returns to the initial position by the return force, and the valve is in the closed state.

According to the drain valve driving device of the present invention, when the valve body 8 is driven and displaced from the initial position to the operating position, in order to prevent the driving force of the driving source from being transmitted to the valve body 8 and to maintain the valve body 8, the pulling member 7, and the rotary output member 6 in the state when the valve body 8 is in the operating position, it is not necessary to separately realize the function of moving the clutch disc and the function of preventing the reverse rotation of the clutch check wheel by using different members as in the conventional art, and it is only necessary to control the operation of the transmission wheel 32 by using one member, i.e., the switching stopper rod 51 integrally having the switching portion 511 and the stopper portion 512, and therefore, the structure of the drain valve driving device is simplified, and the manufacturing cost is reduced.

In addition, according to the drain valve driving apparatus of the present invention, by providing the locking claw 3231 at the outer peripheral edge of the disc-shaped portion 323 of the driving wheel 32, it is possible to help reduce the impact force received by the locking claw 3231 when engaging with the clutch wheel 31, delay the abrasion of the locking claw 3231, and thus extend the service life of the driving wheel 32.

Further, according to the drain valve driving apparatus of the present invention, by providing the locking piece 3232 at the outer periphery of the disc-shaped portion 323 of the driving wheel 32, the impact force received by the locking piece 3232 when locking with the stopper portion 512 of the switching stopper rod 51 is facilitated to be reduced, and the abrasion of the locking piece 3232 is delayed, thereby prolonging the service life of the driving wheel 32.

Further, according to the drain valve driving device of the present invention, since the locking piece 3232 is formed to protrude toward the opposite side to the clutch wheel 31, the stopper portion 512 of the switching stopper rod 51 is easily locked to the locking piece 3232 when the valve body 8 is displaced to the operation position.

Further, according to the drain valve driving device of the present invention, since the drain valve driving device includes the support shaft SS1 for supporting the clutch wheel 31 and the transmission wheel 32, and the switching lever 51 includes the hole 513 into which the support shaft SS1 is inserted, the switching lever 51 can be positioned by the hole 513 at the time of assembly, and the assembly efficiency can be improved.

Further, according to the drain valve driving device of the present invention, the urging member 52 is a compression coil spring provided between the clutch wheel 31 and the transmission wheel 32, and therefore, the urging member 52 is simple in structure, contributing to reduction in manufacturing cost.

The invention has been described above by way of example with reference to the accompanying drawings, it being apparent that the invention is not limited to the embodiments described above.

For example, in the above embodiment, the driving source is a motor, but not limited thereto, and a linear actuator or the like may be employed as the driving source according to circumstances.

In the above embodiment, the pulling member 7 is a wire, but the present invention is not limited thereto, and the pulling member may be a block member.

In the above embodiment, the switching lever 51 has the hole 513 into which the support shaft SS1 is inserted, but the present invention is not limited thereto, and a groove may be provided instead of the hole 513 as shown in fig. 7. In this case, assembly is easier than in the case where the hole portion is provided.

In the above embodiment, the urging member 52 is a compression coil spring provided between the clutch wheel 31 and the transmission wheel 32, but the urging member is not limited to this, and may be formed of a pair of magnets or the like.

In addition, in the above embodiment, the braking portion 42 includes the braking wheel 421, the restoring elastic member, and the transition member 422, but is not limited thereto, and the transition member 422 may be omitted as occasion demands, so that the braking wheel 421 directly locks the ring gear 35.

In the above embodiment, the transition gear TG is provided between the planetary gear mechanism of the output clutch mechanism 3 and the rotary output member 6, but the present invention is not limited thereto, and the transition gear TG may be omitted as the case may be.

Claims

1. A drain valve driving device comprises a driving source, an output clutch mechanism, a linkage brake mechanism, a switching limit mechanism, a rotary output member, a pulling member and a valve core, wherein the driving force of the driving source is transmitted to the valve core sequentially through a clutch wheel and a driving wheel which are included in the output clutch mechanism, the rotary output member and the pulling member, and the linkage brake mechanism and the switching limit mechanism are used for controlling the output clutch mechanism, so that after the valve core is shifted from an initial position to an action position, the driving force of the driving source is not transmitted to the valve core any more, and the valve core, the pulling member and the rotary output member are kept in a state when the valve core is in the action position,

the switching limiting mechanism comprises a switching limiting rod and a force application component,

the switching limiting rod rotates along with the rotary output part,

the force application component applies force for separating the driving wheel from the clutch wheel along the rotation axis direction of the driving wheel and the clutch wheel,

the switching limiting rod is integrally provided with a switching part and a limiting part,

the switching part is arranged to enable the driving wheel to be jointed with the clutch wheel against the acting force of the force application part when the valve core is at the initial position, and enable the driving wheel to be shifted from the joint position of the clutch wheel to the separation position of the clutch wheel by the acting force of the force application part when the valve core is shifted to the action position,

the limiting part is arranged to limit the driving wheel to reverse when the valve core is shifted to the action position,

the transmission wheel comprises:

a shaft portion extending in the rotation axis direction; and

a disk-shaped portion that expands radially outward from the shaft portion,

and a locking claw which is engaged with and separated from the clutch wheel is arranged at the outer periphery of the disc-shaped part.

2. The drain valve driving device according to claim 1, wherein,

a locking piece for locking the limiting part when the valve core is shifted to an action position is arranged at the outer periphery of the disc-shaped part.

3. The drain valve driving device according to claim 2, wherein,

the locking piece protrudes toward a side opposite to the clutch wheel.

4. The drain valve driving device according to claim 1, wherein,

the output clutch mechanism comprises a planetary gear mechanism,

the planetary gear mechanism includes:

the drive wheel having a sun gear portion;

a planetary gear meshed with the sun gear portion;

a planetary carrier connected to the rotary output member; and

and the gear ring is meshed with the planetary gear and is controlled by the linkage braking mechanism.

5. The drain valve driving device according to claim 4, wherein,

the transmission wheel comprises:

the shaft part penetrates through the clutch wheel;

a sun gear portion provided on one end side of the shaft portion, the one end side being closer to the clutch wheel than the shaft portion; and

a disk portion provided on the shaft portion at a position closer to the other end side of the shaft portion than the clutch wheel,

the limiting part is abutted with the disc-shaped part to limit the reverse rotation of the driving wheel when the valve core is shifted to the action position.

6. The drain valve driving device according to claim 5, wherein,

the locking claw protrudes towards the clutch wheel,

an engagement piece is provided at the outer periphery of the disk-shaped portion, the engagement piece being engaged with the stopper portion when the valve body is displaced to the operating position, the engagement piece protruding toward the opposite side of the clutch wheel.

7. The drain valve driving device according to any one of claims 1 to 6, wherein,

the drain valve driving device is provided with a supporting shaft for supporting the clutch wheel and the driving wheel,

the switching limiting rod is provided with a groove part or a hole part for the supporting shaft to be inserted.

8. The drain valve driving device according to any one of claims 1 to 6, wherein,

the force application component is a compression coil spring arranged between the clutch wheel and the driving wheel.