CN213808570U - One-way gear, clutch driving mechanism, pump and washing machine - Google Patents

Abstract

The utility model belongs to the technical field of washing machine, a one-way gear, separation and reunion actuating mechanism, pump and washing machine are specifically disclosed. The one-way gear includes: the gear transmission piece comprises an edge gear part and a ratchet part, the outer diameter of the ratchet part is larger than that of the gear part, an accommodating groove is formed in the end face, away from the gear part, of the ratchet part, and a plurality of ratchet teeth are arranged on the groove wall of the accommodating groove at intervals along the circumferential direction; the one-way transmission part comprises a connecting column part and a pawl part, wherein the pawl part is at least provided with one pawl along the circumferential direction of the one-way gear, the pawl part is positioned in the accommodating groove, and the pawl and the ratchet teeth are matched for one-way transmission. The clutch driving mechanism comprises the one-way gear, the pump is driven to operate by the clutch driving mechanism, and the washing machine adopts the pump to throw the detergent. The utility model discloses an one-way gear, separation and reunion actuating mechanism, pump and washing machine can improve the operational reliability and the life of pump and automatic dispensing system.

Description

One-way gear, clutch driving mechanism, pump and washing machine

Technical Field

The utility model relates to a washing machine technical field especially relates to an one-way gear, separation and reunion actuating mechanism, pump and washing machine.

Background

With the increasing living standard of people, the washing machine has become one of the essential household appliances for family life. According to the rotating mode, the washing machines are divided into a drum washing machine and a pulsator washing machine, and the drum washing machine and the full-automatic pulsator washing machine are generally provided with an automatic feeding system for feeding detergent into a washing tub, so that various detergents such as laundry detergent and softener added from the outside are flushed into the washing tub by inlet water, and the clothes are cleaned and washed.

Most of the existing washing machines require an automatic dosing system to be able to dose two solutions separately, and therefore the existing pumps for driving the automatic dosing system to dose the liquid are usually two-way pumps, i.e. they comprise two pump chambers. In order to realize the independent feeding of each solution, a clutch driving mechanism is arranged in the two-way pump, and the clutch driving mechanism is used for independently controlling the piston assembly in each pump cavity by driving the electric matching clutch assembly.

The existing clutch component usually adopts a structural form of two one-way gears with opposite transmission directions, and clutch control is realized through the one-way transmission of the one-way gears. However, the one-way gear in the prior art is usually low in structural strength, and continuous and reliable operation of the one-way gear is difficult to guarantee, so that the operation reliability of the clutch driving mechanism is reduced, and the service life of the clutch driving mechanism is prolonged.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide an one-way gear improves one-way gear's structural strength and life.

Another object of the utility model is to provide a separation and reunion actuating mechanism improves separation and reunion actuating mechanism's use reliability and life.

It is another object of the present invention to provide a pump, which improves the reliability and service life of the pump.

Another object of the present invention is to provide a washing machine, which improves the reliability and the service life of the automatic feeding system in the washing machine.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

a one-way gear comprising:

the gear transmission part comprises a gear part and a ratchet wheel part which are axially connected, the outer diameter of the ratchet wheel part is larger than that of the gear part, an accommodating groove is formed in the end face, far away from the gear part, of the ratchet wheel part, a plurality of ratchet wheel teeth are arranged on the groove wall of the accommodating groove at intervals along the circumferential direction, a gear transmission surface is formed on the periphery of the gear part, a central through hole is formed in the gear part in a penetrating mode along the center, and the inner diameter of the accommodating groove is larger than that of the central through hole;

the unidirectional transmission part comprises a connecting column part and a pawl part which are axially connected, the connecting column part is inserted into the central through hole, the pawl part is at least provided with one pawl along the circumferential direction of the unidirectional gear, the pawl part is positioned in the accommodating groove, the pawl and the ratchet wheel teeth are matched for unidirectional transmission, and an output shaft part is convexly arranged on the end face of one end, far away from the pawl part, of the connecting column part.

A clutch drive mechanism comprising:

the driving motor comprises a motor shell, a motor end cover buckled and connected with the motor shell and a motor main body partially accommodated in the motor shell, and a driving shaft of the motor main body penetrates out of the motor end cover;

the driving gear is sleeved on the driving shaft;

the two unidirectional gears are respectively meshed with the driving gear, and the directions of allowed output torques of the two unidirectional gears are opposite;

the limiting sealing cover is connected with the motor end cover in a buckled mode, a mounting cavity is formed after the limiting sealing cover is connected with the motor end cover in a buckled mode, the ratchet wheel is located in the mounting cavity and is connected with the motor end cover in a rotating mode, the limiting sealing cover corresponds to two first through holes are formed in the gear portion respectively, the limiting sealing cover corresponds to the driving gear, a second through hole is formed in the driving gear, the gear portion is located in the first through hole respectively, the driving gear is located in the second through hole, and the aperture of the first through hole is smaller than the outer diameter of the ratchet wheel.

As a preferable technical scheme of the clutch driving mechanism, at least one of the one-way gears is provided with a first error-proofing structure, and the first error-proofing structure is used for preventing the one-way transmission member of one of the one-way gears from being mounted on the gear transmission member of the other one-way gear.

As a preferable technical scheme of the clutch driving mechanism, two mounting shafts are convexly arranged on one side of the motor end cover facing the limiting sealing cover, a mounting hole is formed in one end, away from the output shaft, of each pawl part, each mounting shaft is inserted into the mounting hole corresponding to the one-way gear, and the mounting shafts are in clearance fit with the corresponding mounting holes;

the shaft diameters of the two mounting shafts are different; or/and the mounting holes are blind holes, one of the mounting shafts is provided with a mistake-proofing jack along the axial direction, the hole bottom of the mounting hole corresponding to the mounting shaft is convexly provided with a mistake-proofing column, and the mistake-proofing column is inserted into the mistake-proofing jack.

A pump, comprising:

the pump body is provided with two pump cavities, and a liquid inlet and a liquid outlet which are communicated with the corresponding pump cavities are formed in the pump body corresponding to each pump cavity;

the piston assembly is arranged in each pump cavity in a sliding mode;

the clutch driving mechanism, wherein the two output shaft parts of the clutch driving mechanism are respectively connected with the two piston assemblies, so that the positive and negative rotation of the driving motor selectively drives any one of the piston assemblies to move in the pump cavity;

the liquid inlet check valve is arranged at each liquid inlet, and only allows liquid to flow into the pump cavity from the outside;

and each liquid outlet is provided with the liquid outlet one-way valve, and the liquid outlet one-way valve only allows liquid to flow from the pump cavity to the outside of the pump body.

As a preferred aspect of the pump, the pump body includes:

the pump comprises a pump body and a clutch driving mechanism, wherein the pump body comprises a connecting cover part and two pump column parts arranged side by side, each pump column part is provided with a pump cavity in a penetrating way, one end of each pump column part is connected with the clutch driving mechanism, and the other end of each pump column part is connected with the connecting cover part;

the valve mounting plate is connected to one side, away from the pump cylinder part, of the connecting cover part, the valve mounting plate is provided with the liquid inlet and the liquid outlet corresponding to each pump cavity, and the liquid inlet and the liquid outlet are respectively communicated with the corresponding pump cavities in a sealing mode;

pump top cap, its with the connection cover portion lock is connected, the valve mounting panel connect in the pump main part with between the pump top cap, correspond every on the pump top cap inlet liquid channel and liquid outlet channel have all been seted up alone to the pump chamber, inlet liquid channel's one end and the sealed intercommunication of inlet that corresponds, inlet liquid channel's the other end and outside intercommunication, liquid outlet channel's one end and corresponding the sealed intercommunication of liquid outlet, liquid outlet channel's the other end and outside intercommunication.

As a preferred technical scheme of the pump, each liquid inlet channel is provided with a liquid inlet notch which is just opposite to and communicated with the liquid inlet, and each liquid outlet channel is provided with a liquid outlet notch which is just opposite to and communicated with the liquid outlet;

the pump top cap with be provided with first sealing member between the valve mounting panel, first sealing member corresponds two the pump chamber sets up one respectively, just first sealing member is "8" font structure, first sealing member includes two first sealed ring portion and connects in two first junction between the first sealed ring portion, every two of first sealing member first sealed ring portion encircles respectively the correspondence the feed liquor notch with go out the liquid notch setting, first junction is located the feed liquor notch with go out between the liquid notch.

As a preferred technical scheme of the pump, one surface of the pump top cover facing the pump cavity is provided with a first sealing groove, the first sealing groove comprises two annular groove parts and a communication groove part communicated between the two annular groove parts, the two annular groove parts surround the liquid inlet notch and the liquid outlet notch respectively, the communication groove part is positioned between the liquid inlet notch and the liquid outlet notch, the two first sealing ring parts are positioned in the two annular groove parts respectively, and the first connecting part is positioned in the communication groove part;

the pump top cap orientation the protruding ring that is equipped with of one end of valve mounting panel encircles the first muscle that keeps off of feed liquor notch and encircleing the second that goes out the liquid notch keeps off the muscle, first keep off the muscle with the second keeps off the muscle and forms the correspondence at least respectively the interior cell wall of annular slot portion, just first fender muscle and/or the second keeps off the muscle and forms the cell wall of intercommunication slot portion.

As a preferred technical scheme of the pump, a second sealing element is arranged between the connecting cover part and the valve mounting plate, the second sealing element is in an 8-shaped structure, the second sealing element comprises two second sealing ring parts and a second connecting part connected between the two second sealing ring parts, the two second sealing ring parts are respectively arranged around the two pump cavities towards the opening of the valve mounting plate, and the liquid inlet and the liquid outlet corresponding to each pump cavity are both positioned on the inner side corresponding to the second sealing ring parts;

the valve mounting plate is provided with a first sealing groove, the connecting cover part faces one side of the valve mounting plate, the shape of the first sealing groove is matched with that of the first sealing element, and the first sealing element is located in the first sealing groove.

As an optimal technical scheme of a pump, every inlet channel all has just to the intercommunication the inlet opening of liquid inlet, every outlet channel all has just to the intercommunication the liquid outlet opening of liquid outlet, the protruding antiseized arch that is equipped with of inslot wall in liquid outlet opening.

As a preferred technical scheme of the pump, a convex column is convexly arranged on the periphery of each liquid outlet on one side surface of the valve mounting plate facing the pump main body; and/or a convex column is convexly arranged on the periphery of each liquid inlet, and the side surface of the valve mounting plate, which faces the pump top cover, is provided with the convex column.

As a preferred aspect of the pump, the piston assembly includes: the piston comprises a piston rod part and a plunger part, one end of the piston rod part is connected with the output shaft part, the other end of the piston rod part is connected with one end of the plunger part, and two third sealing grooves are formed in the periphery of the plunger part at intervals along the axial direction of the plunger part;

and Y-shaped sealing rings are arranged in the third sealing groove, and one Y-shaped sealing ring and two Y-shaped sealing rings are arranged in opposite directions.

A washing machine comprises an automatic dosing system, wherein the automatic dosing system adopts the pump to dose detergent.

The beneficial effects of the utility model reside in that:

the utility model provides an one-way gear through setting the gear drive spare to gear portion and ratchet portion that links to each other along axial direction, sets the one-way drive spare to including the pawl portion and the junction post portion that link to each other along the axial, and makes the junction post portion wear to locate in the central through-hole of gear portion, and the pawl position is in the storage tank of ratchet, can be when realizing one-way transmission, increases one-way gear's structural strength, improves one-way gear's life and transmission reliability.

The utility model provides a separation and reunion actuating mechanism carries out the separation and reunion transmission through adopting foretell one-way gear, can improve separation and reunion actuating mechanism's use reliability and life.

The embodiment of the utility model provides a pump, through adopting the operation of foretell separation and reunion actuating mechanism control pump, improve the use reliability and the life of pump.

The embodiment of the utility model provides a washing machine carries out the input of detergent through adopting foretell pump, can improve automatic dispensing system's operational reliability and life.

Drawings

Fig. 1 is a structural view of a pump according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a disassembled structure of a pump provided by an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a clutch driving mechanism provided in an embodiment of the present invention;

fig. 4 is a schematic view of a split structure of a clutch driving mechanism according to an embodiment of the present invention at a viewing angle;

fig. 5 is a schematic structural diagram of a split structure of a clutch driving mechanism according to an embodiment of the present invention at another viewing angle;

fig. 6 is a schematic structural diagram of a split structure of a clutch assembly according to an embodiment of the present invention at a viewing angle;

fig. 7 is a schematic structural diagram of a clutch assembly according to an embodiment of the present invention, wherein the structure of the clutch assembly is shown in another view;

fig. 8 is a schematic view of a disassembled structure of a pump body according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of a pump main body according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a valve mounting plate provided in an embodiment of the present invention at a viewing angle;

fig. 11 is a schematic structural diagram of a valve mounting plate provided in an embodiment of the present invention at another viewing angle;

fig. 12 is a schematic structural diagram of a cover top plate according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a piston assembly according to an embodiment of the present invention;

fig. 14 is a schematic view of a disassembled structure of a piston assembly according to an embodiment of the present invention.

The figures are labeled as follows:

1. a drive motor; 11. a motor main body; 111. a drive shaft; 112. an extension ear; 12. a motor housing; 13. a motor end cover; 131. an installation cylinder part; 132. a mounting box part; 133. installing a shaft; 1331. a mistake proofing jack; 134. supporting ribs; 135. a first positioning post;

2. a clutch assembly; 21. a one-way gear; 211. a gear transmission member; 2111. a gear portion; 21111. a central through hole; 2112. a ratchet portion; 21121. a containing groove; 21122. ratchet teeth; 2113. a first groove; 2114. a second groove; 212. a one-way transmission member; 2121. a connection post portion; 2122. a pawl portion; 21221. a limiting part; 21222. a pawl; 2123. an output shaft portion; 2124. a mistake proofing column; 2125. mounting holes; 2126. a protrusion; 22. a driving gear;

3. limiting and sealing the cover; 31. a first perforation; 32. a second perforation; 33. a mounting surface; 34. a guide strip; 35. a guide chute; 36. an insertion block; 37. a rib is protruded;

4. a pump body; 41. a pump body; 411. a pump cylinder portion; 4111. a pump chamber; 4112. an open cylindrical portion; 4113. a cylindrical portion; 412. a connecting cover part; 4121. an annular groove; 4122. a second seal groove; 413. a first guide rib; 414. a first guide groove; 415. a second guide rib; 416. a second guide groove; 417. a connecting portion; 4171. a slot; 418. a guide rib portion; 42. a pump top cover; 421. a liquid inlet pipe part; 422. a liquid outlet pipe part; 423. a cover main body; 4231. a cover plate portion; 4232. a flange portion; 4233. a liquid inlet tank; 4234. a liquid outlet groove; 4235. a bayonet; 4236. a first barrier rib; 4237. a second rib; 4238. a first seal groove; 42381. an annular groove portion; 42382. a communicating groove portion; 424. sticking prevention protrusions; 43. a valve mounting plate; 431. a liquid outlet; 432. a liquid inlet; 433. positioning the projection; 434. a convex column; 435. a hook; 44. blocking and sealing the cover;

5. a piston assembly; 51. a piston; 511. a piston rod portion; 5111. a slider portion; 512. a plunger portion; 5121. a third seal groove; 513. a guide projection; 52. a Y-shaped seal ring;

6. a liquid inlet check valve; 7. a liquid outlet one-way valve; 8. a first seal member; 9. a second seal.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.

Fig. 1 is the utility model provides a pump's schematic structure, fig. 2 is the utility model provides a pump's split structure schematic diagram, as shown in fig. 1 and 2, this embodiment provides a pump, and it can be applied to in washing machine's the automatic dispensing system, provides drive power for the input of detergent, also can be applied to in other scenes that need carry out liquid transport.

Specifically, the pump comprises a pump body 4, a piston assembly 5, a clutch driving mechanism, a liquid inlet one-way valve 6 and a liquid outlet one-way valve 7, wherein two separated pump cavities 4111 are arranged in the pump body 4, and a liquid inlet 432 and a liquid outlet 431 which are communicated with the pump cavities 4111 are arranged on the pump body 4 corresponding to each pump cavity 4111; each pump chamber 4111 is slidably provided with a piston assembly 5, such that sliding movement of the piston assembly 5 within the pump chamber 4111 changes the volume of the liquid in the pump chamber 4111 to facilitate the movement of the liquid into or out of the pump chamber 4111; the clutch driving mechanism is used for selectively driving one of the piston assemblies 5 to slide in the corresponding pump cavity 4111; a liquid inlet one-way valve 6 is arranged at each liquid inlet 432, and the liquid inlet one-way valve 6 only allows liquid to enter the pump cavity 4111 from the outside; each liquid outlet 431 is provided with a liquid outlet check valve 7, and the liquid outlet check valve 7 only allows liquid to flow out of the liquid outlet 431 from the pump chamber 4111.

Fig. 3 is the structural schematic diagram of the clutch driving mechanism provided by the embodiment of the present invention, fig. 4 is the embodiment of the present invention provides a structural schematic diagram of the split structure of the clutch driving mechanism under one viewing angle, fig. 5 is the embodiment of the present invention provides a structural schematic diagram of the split structure of the clutch driving mechanism under another viewing angle. As shown in fig. 3-5, the clutch driving mechanism includes a driving motor 1, a clutch assembly 2 and a limit cover 3, the clutch assembly 2 includes a driving gear 22 and two one-way gears 21, and a driving shaft 111 of the driving motor 1 is connected with the driving gear 22 to drive the driving gear 22 to rotate; the two one-way gears 21 are respectively meshed with the driving gear 22, the allowed torque transmission directions of the two one-way gears 21 are opposite, each one-way gear 21 is provided with an output shaft part 2123, and the output shaft parts 2123 are connected with the corresponding piston assemblies 5; the limit cover seal 3 is used for limiting the clutch assembly 2 to move along the axial direction of the driving shaft 111 and maintaining the connection stability between the driving shaft 111 and the driving gear 22.

That is, the clutch driving mechanism provided in this embodiment controls the rotation direction of the driving gear 22 through the forward and reverse rotation of the driving motor 1, and since the transmission directions of the allowable torques of the two one-way gears 21 are opposite, the rotation of the driving gear 22 in the clockwise direction can only drive one-way gear 21 to output a torque outwards, so that only the piston assembly 5 connected to the one-way gear 21 can be driven to move; the rotation of the driving gear 22 in the counterclockwise direction can only drive the other one-way gear 21 to output torque outwards, so that when the pump works, only one piston assembly 5 acts in the corresponding pump cavity 4111, and the working piston assembly 5 can be switched by switching the forward rotation and the reverse rotation of the driving motor 1.

Driving motor 1 includes motor casing 12, motor end cover 13 and motor body 11, and motor casing 12 is one end opening, one end confined tubular structure, and motor end cover 13 lock surrounds with motor casing 12 at the opening part of motor casing 12 and is formed with and holds the chamber, and the most structure holding of motor body 11 is in holding the chamber, and motor body 11's drive shaft 111 passes motor end cover 13 in order to stretch out and hold the chamber outside.

The motor end cover 13 includes a mounting cylinder portion 131 and a mounting box portion 132 with opposite openings, and a cylinder bottom of the mounting cylinder portion 131 and a box body of the mounting box portion 132 are integrally formed. In the present embodiment, the outer diameter of the mounting cylinder 131 is equal to the inner diameter of the motor case 12, the opening of the mounting cylinder 131 faces the accommodating cavity, and the mounting cylinder 131 is inserted into the interior of the motor case 12 to close the opening of the motor case 12. Both ends of the mounting box portion 132 in the longitudinal direction extend outside the mounting tube portion 131, and the opening end surface of the motor case 12 abuts against the outer wall of the case bottom of the mounting box portion 132 to limit the depth of insertion of the mounting tube portion 131 into the motor case 12. In this embodiment, the motor casing 12 is connected with the motor end cover 13 in a snap-fit manner, and in other embodiments, the motor casing 12 and the motor end cover 13 may also be connected in other detachable connection manners, such as a threaded connection. And the arrangement of the motor housing 12 and the motor main body 11 can refer to the arrangement of the existing motor, and will not be described in detail here.

In order to prevent the motor main body 11 from rotating relative to the motor casing 12, an extending ear 112 extends outwards from the peripheral wall of the motor main body 11, and the extending ear 112 extends out of the motor casing 12 through an escape opening in the motor casing 12. First locating hole has been seted up to extension ear 112, and the protruding first locating post 135 that is equipped with of tank bottom of spacing groove, the external diameter of first locating post 135 equals the aperture in first locating hole, and the reference column inserts in the locating hole to this can realize the installation location of motor main part 11 and motor end cover 13, and guarantees that motor main part 11, motor casing 12 and motor end cover 13 are static relatively.

Fig. 6 is the structure diagram of the split structure of the clutch assembly provided by the embodiment of the present invention at a viewing angle, fig. 7 is the structure diagram of the split structure of the clutch assembly provided by the embodiment of the present invention at another viewing angle, as shown in fig. 6 and 7, the one-way gear 21 includes a gear transmission member 211 and a one-way transmission member 212 coaxially disposed. The gear transmission member 211 includes a gear portion 2111 and a ratchet portion 2112 connected along the axial direction thereof, the peripheral wall of the gear portion 2111 is provided with transmission teeth engaged with the drive gear 22; the outer diameter of the ratchet portion 2112 is larger than the outer diameter of the gear portion 2111, the ratchet portion 2112 has an accommodating groove 21121 opening away from the gear portion 2111, and a groove wall of the accommodating groove 21121 is provided with a plurality of ratchet teeth 21122 protruding at regular intervals in the circumferential direction of the ratchet portion 2112.

The gear portion 2111 has a center through hole 21111 extending axially therethrough, and the diameter of the center through hole 21111 is smaller than the inner diameter of the accommodating groove 21121. The one-way transmission member 212 includes a connection post portion 2121 and a pawl portion 2122 connected along the axial direction thereof, the connection post portion 2121 is inserted into the central through hole 21111 and is in clearance fit with the central through hole 21111, and an output shaft portion 2123 is connected to an end of the connection post portion 2121 remote from the drive motor 1. The pawl portion 2122 includes a limiting portion 21221 and a pawl 21222, the limiting portion 21221 is connected to one end of the connecting post portion 2111 away from the output shaft portion 2123, an outer diameter of the limiting portion 21221 is larger than an outer diameter of the connecting post portion 2111 and smaller than an inner diameter of the accommodating groove 21121, the limiting portion 21221 is accommodated in the accommodating groove 21121, and end surfaces of two ends of the limiting portion 21221 are respectively abutted to a bottom of the accommodating groove 21121 and a bottom of the mounting box portion 132.

At least one pawl 21222 is connected to the peripheral wall of the limiting portion 21221, one end of the pawl 21222 is connected to the limiting portion 21221, the other end of the pawl 21222 extends clockwise or counterclockwise, and the pawl 21222 is used for cooperating with the ratchet teeth 21122 for transmission. In this embodiment, three pawls 21222 on each one-way transmission member 212 are uniformly spaced along the circumferential direction of the one-way transmission member 212, and in other embodiments, the number of pawls 21222 may be selected as required.

To achieve the difference in the allowable torque transmission directions of the two one-way gears 21, the pawls 21222 of the two one-way gears 21 extend in different directions from the fixed end to the free end, one of which extends in the clockwise direction and the other of which extends in the counterclockwise direction. Meanwhile, the ratchet teeth 21122 of the two unidirectional gears 21 are inclined in different directions to engage with the corresponding pawls 21222 for unidirectional transmission. The structure of the ratchet teeth 21122 and the pawls 21222, which can realize the one-way driving fit, can refer to the prior art, and the embodiment is not particularly limited thereto.

In the unidirectional gear 21 provided in this embodiment, the gear transmission member 211 is provided with the gear portion 2111 and the ratchet portion 2112 which are connected in the axial direction, the unidirectional transmission member 212 is provided to include the pawl portion 2122 and the connecting column portion 2121 which are connected in the axial direction, the connecting column portion 2121 is inserted into the central through hole 21111 of the gear portion 2111, and the pawl portion 2122 is located in the accommodating groove 21121 of the ratchet portion 2112, so that the unidirectional transmission can be realized, the structural strength of the unidirectional gear 21 can be increased, and the service life and the transmission reliability of the unidirectional gear 21 can be improved.

In this embodiment, the two gear portions 2111 have the same structure, and the number of teeth and the reference circle diameter of the two gear portions 2111 are the same as those of the driving gear 22, so as to realize equal ratio transmission and ensure that the rotation speed and the torque transmitted by the two one-way gears 21 are the same. In this arrangement, since the pawls 21222 and the ratchet teeth 21122 of the two unidirectional gears 21 are different, and the pawls 21222 need to cooperate with the corresponding ratchet teeth 21122 to realize unidirectional transmission, in order to avoid the misassembly of the unidirectional transmission member 212 with the pawls 21222 on the gear transmission member 211, at least one unidirectional gear 21 is provided with a first misassembly prevention structure.

In the present embodiment, the first anti-mismounting structure is provided on each of the two one-way gears 21. Specifically, an end surface (first end surface) of the connecting column portion 2121 remote from the pawl portion 2122 projects from a corresponding end surface of the gear portion 2111, and a projection 2126 extends in the radial direction on the first end surface, and the projection 2126 is located above the end surface of the one-way gear 21. The output shaft portion 2123 protrudes from the first end surface of the connecting column portion 2121 along a radial portion of the first end surface, a first concave groove 2113 and a second concave groove 2114 are formed in a corresponding end surface of the one-way gear 21, the first concave groove 2113 and the second concave groove 2114 are different in size and/or shape, and if the gear transmission member 211 and the one-way transmission member 212 are correctly assembled, when the protrusion 2126 is correspondingly rotated above the first concave groove 2113, the output shaft portion 2123 is located above the second concave groove 2114. And the relative positions of the first notch 2113 and the second notch 2114 in the two one-way gears 21 are different, so that the projection 2126 and the output shaft portion 2123 cannot correspond to the first notch 2113 and the second notch 2114 one to one if the gear transmission member 211 is misassembled.

In other embodiments, a square-fitting structure may be provided on only one of the unidirectional gears 21, for example, a protrusion 2126 may be provided on the connecting column portion 2121 of only one of the unidirectional gears 21, and a first notch 2113 may be provided on the end surface of the corresponding gear portion 2111, and at this time, the unidirectional transmission member 212 with the protrusion 2126 and the gear transmission member 211 with the first notch 2113 are assembled to achieve error proofing. In other embodiments, other structures may be used to prevent errors.

As shown in fig. 3-5, the limiting cover 3 is fastened to the mounting box 132 to form a mounting cavity, and the limiting cover 3 and the mounting box 132 can be detachably connected by clamping, screwing, or the like, so as to facilitate the mounting of the clutch assembly 2. In order to realize the installation and positioning of the limit cover 3 and the mounting box part 132, one of the limit cover 3 and the mounting box part 132 is provided with a second positioning column, and the other one is provided with a second positioning hole, and the second positioning column is inserted into the second positioning hole.

In order to mount the clutch assembly 2 on the mounting box portion 132, the mounting shaft 133 is protruded from the mounting box portion 132, the one-way transmission member 212 of the one-way gear 21 is provided with a mounting hole 2125, and the mounting hole 2125 is in clearance fit with the mounting shaft 133. In order to prevent the control error of the piston assembly 5 caused by the position error of the two one-way gears 21, a second error-proof structure is provided on the mounting box portion 132. Specifically, the two mounting shafts 133 have different outer diameters, and correspondingly, the two mounting holes 2125 have different hole diameters.

Further, in this embodiment, the mounting hole 2125 is a blind hole opening toward the mounting box portion 132, the bottom of the mounting hole 2125 having a larger inner diameter is provided with a mistake-proofing post 2124 in a protruding manner, the corresponding mounting shaft 133 is provided with a mistake-proofing insertion hole 1331, the diameter of the mistake-proofing post 2124 is the same as that of the mistake-proofing insertion hole 1331, and the mistake-proofing post 2124 can be inserted into the mistake-proofing insertion hole 1331. The provision of the error-proofing post 2124 and the error-proofing insertion hole 1331 can further prevent the one-way gear 21 from being mounted on the wrong mounting shaft 133.

In this embodiment, the limit cover 3 has a first through hole 31 corresponding to the two gear portions 2111, a second through hole 32 corresponding to the driving gear 22, the first through hole 31 is communicated with the second through hole 32, the diameter of the first through hole 31 is greater than the diameter of the gear portion 2111 and smaller than the outer diameter of the ratchet portion 2112, the height of the ratchet portion 2112 is equal to the height of the cavity of the installation cavity, and two ends of the ratchet portion 2112 are respectively abutted against the box bottom of the installation box portion 132 and the outer bottom surface of the limit cover 3, so as to prevent the axial movement of the one-way gear 21. The gear portion 2111 is located in the corresponding first perforation 31, and the driving gear 22 is located in the second perforation 32, so that the driving gear 22 and the gear portion 2111 are protected, and the gear portion 2111 and the driving gear 22 are prevented from being collided and damaged by an external structure in the assembling process.

In order to reduce the friction resistance when the ratchet portion 2112 rotates, a convex rib 37 is convexly arranged on the inner bottom surface of the limiting sealing cover 3, and one end surface of the ratchet portion 2112, which is far away from the driving motor 1, abuts against the convex rib 37. Further, a plurality of ribs 37 are provided at intervals radially along the circumferential direction of the first through hole 31 to ensure the stability of the arrangement of the ratchet portion 2112.

In order to facilitate the installation of the driving gear 22, a supporting rib 134 is protruded from the bottom of the installation box portion 132, and the supporting rib 134 is in the shape of a circular arc. A shaft insertion hole through which the drive shaft 111 is inserted is formed through the mounting box portion 132, and the support rib 134 is disposed concentrically with the shaft insertion hole. The height of the support rib 134 is the same as the axial length of the ratchet portion 2112, and the end face of the drive gear 22 is partially supported on the support rib 134 and partially supported on the end faces of the ratchet portions 2112 of the two one-way gears 21.

In the present embodiment, the two one-way gears 21 are arranged side by side along the length direction of the mounting box portion 132, and the centers of the two one-way gears 21 and the center of the driving gear 22 are arranged in a triangle to improve the compactness.

Fig. 8 is a schematic view of a split structure of the pump body provided in the embodiment of the present invention, as shown in fig. 8, the pump body 4 includes a pump main body, a valve mounting plate 43, and a pump top cover 42. The pump body 41 includes a connecting cover portion 412 and two pump column portions 411 arranged side by side, each pump column portion 411 is provided with the pump cavity 4111 in a penetrating manner, one end of the pump column portion 411 is connected with the clutch driving mechanism, and the other end of the pump column portion 411 is connected with the connecting cover portion 412; the valve mounting plate 43 is connected to a side of the connecting cover portion 412 away from the pump column portion 411, the valve mounting plate 43 is provided with the liquid inlet 432 and the liquid outlet 431 corresponding to each pump chamber 4111, and the liquid inlet 432 and the liquid outlet 431 are respectively in sealed communication with the corresponding pump chamber 4111; pump top cap 42 with connect lid 412 lock and connect, valve mounting panel 43 connect in pump main part 41 with between the pump top cap 42, correspond every on the pump top cap 42 pump chamber 4111 has all seted up inlet channel and liquid outlet channel alone, inlet channel's one end and the sealed intercommunication of inlet 432 that corresponds, inlet channel's the other end and outside intercommunication, liquid outlet channel's one end and corresponding the sealed intercommunication of liquid outlet 431, liquid outlet channel's the other end and outside intercommunication.

Fig. 9 is a schematic structural view of the pump main body provided in the embodiment of the present invention, specifically, the pump main body 41 includes two pump column portions 411 disposed side by side, and each pump column portion 411 has a through hole and a pump cavity 4111. The pump body 41 further includes a connection cover portion 412, one end of the pump cylinder portion 411 is connected to the stopper cover 3, and the other end of the pump cylinder portion 411 is connected to the connection cover portion 412.

As shown in fig. 4 and 9, a side of the limit cap seal 3 away from the driving motor 1 forms a mounting surface 33, and in order to facilitate connection and limit between the pump body 41 and the limit cap seal 3, each pump body 41 includes an opening cylindrical portion 4112 and a cylindrical portion 4113 connected along an axial direction thereof, and a central angle corresponding to the opening cylindrical portion 4112 is greater than or equal to 180 ° and less than 360 °. Opening cylinder portion 4112 is connected to one end of cylinder portion 4113 away from pump top cover 42, and opening cylinder portion 4112 is open towards installation face 33, and opening cylinder portion 4112's side plane and installation face 33 face butt joint, and be formed with the spacing face that is used for spacing capseal 3 between opening cylinder portion 4112 and the cylinder portion 4113, and a side end face butt joint of spacing capseal 3 is on spacing face, realizes the installation location of spacing capseal 3 and pump main part 41 in the Z direction.

Further, a connection portion 417 is connected between the two opening cylindrical portions 4112, a slot 4171 is opened on the connection portion 417, the slot 4171 penetrates the connection portion 417 to one side of the mounting surface 33, and the slot 4171 penetrates one end of the connection portion 417 far away from the pump top cover 42. The slot 4171 includes a first slot portion and a second slot portion that communicate, and the first slot portion is located on a side of the second slot portion away from the limit cap seal 3, and a slot width of the first slot portion is greater than a slot width of the second slot portion. The mounting surface 33 is provided with a plug block 36 in a protruding manner, and the shape of the plug block 36 is matched with the shape of the slot 4171, so that the plug block 36 can be inserted from the end of the slot 4171 far away from the pump top cover 42, and the plug block 36 is prevented from being separated from the slot 4171 along the radial direction of the pump column part 411. In other embodiments, the connection portion 417 may be provided with an insertion block 36, and the limit cover 3 may be provided with an insertion groove 4171.

In order to guide the insertion of the insertion block 36 into the insertion groove 4171, two guide bars 34 are provided on the mounting surface 33 in a protruding manner in parallel along the longitudinal direction of the mounting box portion 132, the guide bars 34 have an L-shaped configuration, one end of each guide bar 34 is connected to the mounting surface 33, and the other end of each guide bar 34 is parallel to the mounting surface 33 and spaced apart from the mounting surface 33, so that a guide sliding groove 35 is formed between the guide bar 34 and the mounting surface 33. The side of each opening cylindrical portion 4112 remote from the other pump column portion 411 is protruded with a guide rib portion 418, and the guide rib portion 418 is inserted into the corresponding guide slide groove 35 and slidably connected with the groove wall of the guide slide groove 35. The arrangement of the guide strips 34 and the guide rib portions 418 can provide guidance for the insertion of the limit cover 3 and the pump main body 41, and can provide limitation and positioning along the radial direction of the pump column portion 411 for the connection of the pump main body 41 and the limit cover 3.

In order to improve the connection stability of the limit cover seal 3 and the pump main body 41, the pump main body 41 and the limit cover seal 3 are further connected by a threaded connector. Specifically, the connecting portion 417 has a through hole, the insertion block 36 has a threaded connecting hole, and the threaded connecting member is inserted into the through hole and the threaded connecting hole.

As shown in fig. 8, to facilitate insertion of the piston assembly 5 into the pump chamber 4111, the pump chamber 4111 extends through an end of the pump column portion 411 remote from the pump head 42. To prevent the piston assembly 5 from being removed from the pump chamber 4111 during operation of the pump, a stopper cover 44 is detachably attached to an end of the pump body 41 remote from the pump top cover 42. The shape of the blocking cover 44 is adapted to the shape of the pump body 41, so that the blocking cover 44 can be fastened to the end of the pump body 41 and detachably connected to the pump body 41. In this embodiment, the blocking cover 44 is connected to the pump body 41 by a snap fit, which is convenient to assemble and disassemble. In other embodiments, the blocking cover 44 and the pump body 41 may be screwed together.

Fig. 10 is the schematic structural diagram of the valve mounting plate provided by the embodiment of the present invention at a viewing angle, fig. 11 is the schematic structural diagram of the valve mounting plate provided by the embodiment of the present invention at another viewing angle, as shown in fig. 8-11, for the installation of the liquid inlet check valve 6 and the liquid outlet check valve 7, the pump body 4 further includes a valve mounting plate 43. A connection cover portion 412 is connected to one end of the pump body 41 away from the stopper cover 3, the two pump column portions 411 are vertically connected to the connection cover portion 412, and the pump chamber 4111 penetrates the connection cover portion 412. The valve mounting plate 43 is detachably connected to a side of the connecting cover portion 412 away from the pump column portion 411, and a liquid inlet 432 and a liquid outlet 431 are formed on the valve mounting plate 43 corresponding to each pump chamber 4111.

To avoid mixing of the liquids in the two pump chambers 4111, a second seal 9 is provided between the valve mounting plate 43 and the connecting cover 412. In this embodiment, the second sealing member 9 is in an 8-shaped structure, and includes two connected second sealing ring portions and a second connecting portion connected between the two second sealing ring portions, each second sealing ring portion surrounds one opening of the pump cavity 4111, and the liquid inlet 432 and the liquid outlet 431 corresponding to each pump cavity 4111 are located inside the corresponding second sealing ring portion.

In order to facilitate the installation of the second sealing element 9, a second sealing groove 4122 is formed at one end of the connecting cover part 412 away from the pump cylinder part 411, the shape of the second sealing groove 4122 is matched with the shape of the first sealing element 8, and the second sealing element 9 is embedded in the first sealing groove 4238.

The arrangement of the first sealing element 8 and the first sealing groove 4238 can improve the convenience of arrangement of the sealing structure between the valve mounting plate 43 and the connecting cover part 412, effectively avoid the problems of poor sealing performance, liquid leakage and the like caused by installation dislocation and displacement of the first sealing element 8, effectively improve the sealing effect, and ensure sealing and separation between the two pump cavities 4111.

A side of the connecting cover portion 412 facing the valve mounting plate 43 is opened with an annular groove 4121, one annular groove 4121 is provided for each pump chamber 4111, and the annular groove 4121 is provided around the pump chamber 4111. The annular groove 4121 is provided to reduce the diameter of the single pump chamber 4111, and to ensure the space required for the inlet check valve 6 and the outlet check valve 7.

In order to realize the connection and positioning between the valve mounting plate 43 and the connecting cover part 412, a positioning convex rib 433 is convexly arranged on one surface of the valve mounting plate 43 facing the connecting cover part 412, the positioning convex rib 433 is of an arc-shaped structure, and the corresponding outer diameter of the positioning convex rib 433 is equal to the inner diameter of the annular groove 4121. When the valve mounting plate 43 is connected to the connecting cover portion 412, the positioning ribs 433 are inserted into the annular groove 4121 and abut against the groove wall of the annular groove 4121. In this embodiment, the positioning ribs 433 are provided with two corresponding to each annular groove 4121, and in other embodiments, the number of the positioning ribs 433 can be selected as required.

In order to prevent the liquid inlet check valve 6 and the liquid outlet check valve 7 from being installed in a wrong way, a convex column 434 is convexly arranged on the end surface of one side of the liquid inlet 432 facing the pump top cover 42 and the end surface of one side of the liquid outlet 431 facing the connecting cover part 412. Due to the arrangement of the convex columns 434, misloading of the check valves can be prevented, so that the liquid conveying effect of the pump can be guaranteed, and the assembling efficiency and the assembling yield are improved.

Fig. 12 is a schematic structural view of the cover top plate provided in the embodiment of the present invention, as shown in fig. 12, the pump top cover 42 includes a cover main body 423, a liquid inlet pipe 421 and a liquid outlet pipe 422, which are integrally formed, the cover main body 423 is fastened with the connection cover 412, and the valve mounting plate 43 is clamped inside the cover main body 423. Specifically, the cover main body 423 includes a cover plate portion 4231 and a flange portion 4232 vertically provided around the periphery of the cover plate portion 4231, and the connection cover 412 and the valve mounting plate 43 are inserted inside the flange portion 4232. In the present embodiment, the surface of the valve mounting plate 43 remote from the pump column portion 411 abuts against the inner bottom surface of the cover plate portion 4231, the hook 435 is projected from the valve mounting plate 43, the bayonet 4235 is formed through the cover plate portion 4231, and the hook 435 is engaged with the bayonet 4235. The outer peripheral surface of the connecting cover part 412 is abutted against the inner peripheral surface of the flange part 4232, a clamping protrusion is arranged on the outer side of the connecting cover part 412, a clamping groove is formed in the flange part 4232, and the clamping protrusion is inserted into the clamping groove for clamping. In other embodiments, the connection cover portion 412 and/or the valve mounting plate 43 may be connected to the cover main body 423 by other detachable connection methods, which are not illustrated.

The cover plate portion 4231 is provided with a liquid inlet groove 4233 and a liquid outlet groove 4234 corresponding to each liquid inlet 432 and each liquid outlet 431, the liquid inlet pipe portion 421 is provided with one corresponding to each liquid inlet groove 4233, one end of the liquid inlet pipe portion 421 is communicated with the liquid inlet groove 4233, the other end of the liquid inlet pipe portion 421 is communicated with the outside, that is, the inner cavity of the liquid inlet pipe portion 421 and the liquid inlet groove 4233 form a liquid inlet channel. The liquid outlet pipe portion 422 is provided one for each liquid outlet groove 4234, one end of the liquid outlet pipe portion 422 is communicated with the liquid outlet groove 4234, and the other end of the liquid outlet pipe portion 422 is communicated with the outside, that is, the inner cavity of the liquid outlet pipe portion 422 and the liquid inlet groove 4233 form a liquid outlet channel.

To prevent the communication of liquid between the intake groove 4233 and the exit groove 4234, in the present embodiment, a first sealing member 8 is provided in the cap body 423, and the first sealing member 8 is provided one for each pump chamber 4111. First sealing member 8 is "8" font structure, and it includes two first sealing ring portion and connects the first joint portion between two first sealing ring portion, and two first sealing ring portion encircle the feed liquor notch of feed liquor groove 4233 and the play liquid notch setting of play liquid groove 4234 respectively, and first joint portion is located between feed liquor groove 4233 and the play liquid groove 4234.

In order to improve the installation stability of the first sealing element 8, a first sealing groove 4238 is concavely arranged on the inner surface of the cover plate part 4231, the first sealing groove 4238 comprises two annular groove parts 42381 surrounding the liquid inlet notch and the liquid outlet notch respectively and a communication groove part 42382 positioned between the liquid inlet groove 4233 and the liquid outlet groove 4234, the communication groove part 42382 is communicated with the two annular groove parts 42381, and the groove depth of the first sealing groove 4238 is smaller than the height of the first sealing element 8 when the first sealing element 8 is not compressed. The two first sealing ring portions are located within the annular groove portions 42381, respectively, and the first connecting portion is located in the communication groove portion 42382.

Further, a first rib 4236 is convexly arranged at the liquid inlet slot of the inner surface of the cover plate portion 4231, a second rib 4237 is convexly arranged at the liquid outlet slot, the first rib 4236 and the second rib 4237 at least form inner slot walls corresponding to the annular slot portions 42381, and the first rib 4236 and/or the second rib 4237 form slot walls communicated with the slot portions 42382. The provision of the first and second retaining ribs 4236, 4237 can ensure that the first seal member 8 can be stably mounted in the first seal groove 4238.

Furthermore, the groove wall of the liquid outlet groove 4234 is convexly provided with an anti-sticking protrusion 424 for preventing the liquid outlet check valve 7 from being stuck on the wall of the liquid outlet groove 4234, and ensuring the reliable operation of the liquid outlet check valve 7.

Fig. 13 is the utility model provides a piston assembly's structural schematic, fig. 14 is the utility model provides a piston assembly's split structural schematic, as shown in fig. 13 and 14, piston assembly 5 includes piston 51 and sealing washer, piston 51 includes piston rod portion 511 and plunger portion 512, the axle connecting hole has been seted up along the X direction to the one end of piston rod portion 511, piston rod portion 511 and pump chamber 4111's inner wall sliding connection, one-way gear 21's output axial region 2123 wears to locate in the axle connecting hole, and the width of axle connecting hole equals the diameter of output axial region 2123. Thus, the piston 51 can be caused to reciprocate in the pump chamber 4111 in the axial direction of the pump chamber 4111 by the rotation of the output shaft portion 2123 about the center axis of the one-way gear 21.

The other end of the piston rod portion 511 is connected with the plunger portion 512, two third seal grooves 5121 are formed in the outer peripheral surface of the plunger portion 512 along the axial direction of the plunger portion 512, and a seal ring is arranged in each third seal groove 5121. Preferably, the sealing ring is a Y-shaped sealing ring 52, and the two Y-shaped sealing rings 52 are installed in opposite directions to reduce friction resistance, reduce power of the driving motor 1, and improve sealing effect.

Further, in order to improve the movement reliability of the piston assembly 5 in the pump chamber 4111, two pairs of first guide ribs 413 are convexly disposed on the inner wall of the pump chamber 4111, the first guide ribs 413 extend in the axial direction of the pump chamber 4111, the pair of first guide ribs 413 includes two first guide ribs 413 disposed at intervals in the circumferential direction of the pump chamber 4111, and a first guide groove 414 is formed between the two first guide ribs 413. The piston rod portion 511 is a plate-shaped structure, two opposite sides of the piston rod portion 511 are respectively inserted between the two first guiding sliding grooves 35, and the width of the first guiding groove 414 is equal to the thickness of the piston rod portion 511.

Further, a pair of second guide ribs 415 is further protruded on an inner wall of the pump chamber 4111, the second guide ribs 415 extend along an axial direction of the pump column 4111, and a second guide groove 416 is formed between the two second guide ribs 415. A guide protrusion 513 is protruded from a surface of the piston rod portion 511 corresponding to the second guide groove 416, and a distal end of the guide protrusion 513 is inserted into the second guide groove 416 and slidably coupled to a groove wall of the second guide groove 416.

Through setting up the direction rib, can avoid piston assembly 5 to take place to deflect in the in-process of motion in pump chamber 4111, reduce the wearing and tearing of sealing washer, improve the sliding seal effect. In this embodiment, to avoid the interference between the guide rib and the seal ring, the guide rib is mainly disposed on the opening cylindrical portion 4112.

Further, in order to reduce the frictional resistance between the piston rod portion 511 and the inner wall of the pump chamber 4111, the width of the body of the piston rod portion 511 is smaller than the diameter of the pump chamber 4111, and the opposite sides of the piston rod portion 511 are protruded with slider portions 5111, and the slider portions 5111 are inserted into the guide sliding grooves 35 and slidably connected with the groove walls of the guide sliding grooves 35. This arrangement is advantageous in reducing the contact area between the piston rod portion 511 and the inner wall of the pump chamber 4111.

The embodiment also provides a washing machine, which comprises an automatic feeding system for feeding the detergent, wherein the automatic feeding system adopts the pump to feed two different detergents.

It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.

Claims (13)

1. A one-way gear, comprising:

the gear transmission part (211) comprises a gear part (2111) and a ratchet wheel part (2112) which are connected in the axial direction, the outer diameter of the ratchet wheel part (2112) is larger than that of the gear part (2111), an accommodating groove (21121) is formed in the end face, away from the gear part (2111), of the ratchet wheel part (2112), a plurality of ratchet teeth (21122) are arranged on the groove wall of the accommodating groove (21121) at intervals in the circumferential direction, a gear transmission surface is formed on the periphery of the gear part (2111), a central through hole (21111) is formed in the gear part (2111) in a penetrating mode along the center, and the inner diameter of the accommodating groove (21121) is larger than that of the central through hole (21111);

the unidirectional transmission part (212) comprises a connecting column part (2121) and a pawl part (2122) which are connected in the axial direction, the connecting column part (2121) is inserted into the central through hole (21111), the pawl part (2122) is provided with at least one pawl (21222) along the circumferential direction of the unidirectional gear, the pawl part (2122) is positioned in the accommodating groove (21121), the pawl (21222) and the ratchet teeth (21122) are matched for unidirectional transmission, and an output shaft part (2123) is convexly arranged on one end face of the connecting column part (2121) far away from the pawl part (2122).

2. A clutch drive mechanism, comprising:

the driving motor (1) comprises a motor shell (12), a motor end cover (13) connected with the motor shell (12) in a buckling mode and a motor main body (11) partially contained in the motor shell (12), and a driving shaft (111) of the motor main body (11) penetrates out of the motor end cover (13);

the driving gear (22) is sleeved on the driving shaft (111);

the one-way gear according to claim 1, which is provided with two, two of which are respectively engaged with the driving gear (22) and have opposite directions of allowable output torques;

spacing closing cap (3), its with motor end cover (13) lock is connected, just spacing closing cap (3) with be formed with the installation cavity behind motor end cover (13) lock, ratchet portion (2112) are located the installation cavity and with motor end cover (13) rotate and connect, spacing closing cap (3) correspond two first perforation (31) have been seted up respectively to gear portion (2111), spacing closing cap (3) correspond second perforation (32) have been seted up to driving gear (22), two gear portion (2111) are located two respectively in first perforation (31), driving gear (22) are located in second perforation (32), just the aperture of first perforation (31) is less than the external diameter of ratchet portion (2112).

3. The clutch drive mechanism according to claim 2, wherein at least one of the one-way gears is provided with a first misassembly prevention structure for preventing the one-way transmission member (212) of one of the one-way gears from being mounted on the gear transmission member (211) of the other one-way gear.

4. The clutch driving mechanism according to claim 2, characterized in that two mounting shafts (133) are convexly arranged on one side of the motor end cover (13) facing the limit sealing cover (3), one end of each pawl part (2122) far away from the output shaft part (2123) is provided with a mounting hole (2125), each mounting shaft (133) is inserted into the mounting hole (2125) of the corresponding one-way gear, and the mounting shafts (133) are in clearance fit with the corresponding mounting holes (2125);

the shaft diameters of the two mounting shafts (133) are different; or/and the mounting holes (2125) are blind holes, one of the mounting shafts (133) is provided with a mistake-proofing insertion hole (1331) along the axial direction thereof, a mistake-proofing column (2124) is convexly arranged at the hole bottom of the mounting hole (2125) corresponding to the mounting shaft (133), and the mistake-proofing column (2124) is inserted into the mistake-proofing insertion hole (1331).

5. A pump, comprising:

the pump body (4) is provided with two pump cavities (4111), and a liquid inlet (432) and a liquid outlet (431) which are communicated with the corresponding pump cavity (4111) are arranged on the pump body (4) corresponding to each pump cavity (4111);

a piston assembly (5), wherein the piston assembly (5) is arranged in each pump cavity (4111) in a sliding manner;

the clutch driving mechanism according to any one of claims 2 to 4, wherein two output shaft portions (2123) of the clutch driving mechanism are respectively connected with two piston assemblies (5) so that the positive and negative rotation of the driving motor (1) selectively drives any one of the piston assemblies (5) to move in the pump cavity (4111);

liquid inlet check valves (6), wherein each liquid inlet (432) is provided with the liquid inlet check valve (6), and the liquid inlet check valves (6) only allow liquid to flow into the pump cavity (4111) from the outside;

a liquid outlet one-way valve (7), wherein each liquid outlet (431) is provided with the liquid outlet one-way valve (7), and the liquid outlet one-way valve (7) only allows liquid to flow from the pump cavity (4111) to the outside of the pump body (4).

6. Pump according to claim 5, characterized in that the pump body (4) comprises:

the pump comprises a pump body (41), wherein the pump body (41) comprises a connecting cover part (412) and two pump column parts (411) arranged side by side, each pump column part (411) is provided with a pump cavity (4111) in a penetrating manner, one end of each pump column part (411) is connected with the clutch driving mechanism, and the other end of each pump column part (411) is connected with the connecting cover part (412);

a valve mounting plate (43), the valve mounting plate (43) being connected to a side of the connecting cover portion (412) away from the pump column portion (411), the valve mounting plate (43) being provided with the liquid inlet (432) and the liquid outlet (431) corresponding to each of the pump chambers (4111), the liquid inlet (432) and the liquid outlet (431) being in sealed communication with the corresponding pump chamber (4111), respectively;

pump top cap (42), its with connect lid (412) lock and connect, valve mounting panel (43) connect in pump main part (41) with between pump top cap (42), correspond every on pump top cap (42) pump chamber (4111) has all seted up inlet channel and liquid outlet channel alone, inlet channel's one end and the sealed intercommunication of inlet (432) that correspond, inlet channel's the other end and outside intercommunication, liquid outlet channel's one end and corresponding liquid outlet (431) seal the intercommunication, liquid outlet channel's the other end and outside intercommunication.

7. The pump of claim 6, wherein each of said inlet channels has an inlet slot in facing communication with said inlet (432), and each of said outlet channels has an outlet slot in facing communication with said outlet (431);

pump top cap (42) with be provided with first sealing member (8) between valve mounting panel (43), first sealing member (8) correspond two pump chamber (4111) sets up one respectively, just first sealing member (8) are "8" font structure, first sealing member (8) include two first seal ring portion and connect in two first junction between the first seal ring portion, every two of first sealing member (8) first seal ring portion encircles the correspondence respectively the feed liquor notch with go out the liquid notch setting, first junction is located the feed liquor notch with go out between the liquid notch.

8. The pump according to claim 7, characterized in that a first sealing groove (4238) is formed in a face of the pump top cover (42) facing the pump cavity (4111), the first sealing groove (4238) comprises two annular groove portions (42381) and a communication groove portion (42382) communicated between the two annular groove portions (42381), the two annular groove portions (42381) surround the liquid inlet notch and the liquid outlet notch respectively, the communication groove portion (42382) is located between the liquid inlet notch and the liquid outlet notch, the two first sealing ring portions are located in the two annular groove portions (42381) respectively, and the first connecting portion is located in the communication groove portion (42382);

pump top cap (42) orientation the protruding one end of valve mounting panel (43) is equipped with and encircles first fender muscle (4236) of feed liquor notch and encircleing go out the second fender muscle (4237) of liquid notch, first fender muscle (4236) with second fender muscle (4237) form the correspondence at least respectively the interior cell wall of annular slot portion (42381), just first fender muscle (4236) and/or second fender muscle (4237) form the cell wall of intercommunication slot portion (42382).

9. A pump according to claim 6, wherein a second seal (9) is arranged between the connecting cover portion (412) and the valve mounting plate (43), the second seal (9) is in an 8-shaped structure, the second seal (9) comprises two second seal ring portions and a second connecting portion connected between the two second seal ring portions, the two second seal ring portions are respectively arranged around the openings of the two pump cavities (4111) towards the valve mounting plate (43), and the liquid inlet (432) and the liquid outlet (431) corresponding to each pump cavity (4111) are both positioned at the inner side of the corresponding second seal ring portion;

the side, facing the valve mounting plate (43), of the connecting cover part (412) is provided with a second sealing groove (4122), the shape of the second sealing groove (4122) is matched with the shape of the second sealing element (9), and the second sealing element (9) is located in the second sealing groove (4122).

10. The pump as claimed in claim 6, wherein each inlet channel has an inlet slot opening facing the inlet (432), each outlet channel has an outlet slot opening facing the outlet (431), and the inner wall of the outlet slot opening is convexly provided with an anti-sticking bulge (424).

11. The pump according to claim 6, wherein a side of the valve mounting plate (43) facing the pump body (41) is provided with a boss (434) protruding on the outer periphery of each of the liquid outlets (431); and/or a convex column (434) is convexly arranged on the periphery of each liquid inlet (432) towards one side surface of the pump top cover (42) of the valve mounting plate (43).

12. The pump of claim 5, wherein the piston assembly comprises:

a piston (51) including a piston rod portion (511) and a plunger portion (512), one end of the piston rod portion (511) being connected to the output shaft portion (2123), the other end of the piston rod portion (511) being connected to one end of the plunger portion (512), and the outer periphery of the plunger portion (512) being provided with two third seal grooves (5121) at intervals along the axial direction thereof;

y type sealing washer (52), every all install one in third seal groove (5121Y type sealing washer (52), and two Y type sealing washer (52) are installed back to back.

13. A washing machine comprising an automatic dosing system for dosing detergent using a pump according to any of claims 1-12.

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