Piston pump and laundry treatment apparatus

Abstract

The utility model discloses a piston pump and a clothes processing device, the piston pump comprises a pump body, a piston and a driving assembly, the pump body is of an integrated structure, and the pump body is provided with a piston cavity; the piston is arranged in the piston cavity in a reciprocating sliding mode in the axial direction of the piston cavity. The driving assembly is connected to the pump body, and part of the driving assembly extends into the piston cavity so as to drive the piston to slide in a reciprocating mode. The pump head is connected to the pump body and provided with a liquid outlet and a liquid inlet which are both communicated with the piston cavity. The pump body is of the integrated structure and is provided with the piston cavity, connecting points can be reduced, and therefore possible leakage points and fault points are reduced, the pump body can bear longer-time use, and the stability and reliability of the whole structure of the piston pump are improved. And one part of the pump body is used as a mounting part of the driving assembly, so that the number of parts of the piston pump is reduced, and the assembly process is simplified.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of washing machines, and in particular to a piston pump and a clothes processing device. BACKGROUND

[0002] With the development of science and technology and the improvement of people's living standards, intelligent washing machines have gradually become essential appliances in modern families. The intelligent washing machine usually has the function of automatically dispensing detergent. Through multiple-dimensional sensing, the accurate weight and water consumption of the clothes can be determined, and then the automatic dispensing of the detergent is accurately controlled through the piston pump.

[0003] The piston pump mainly functions to draw and discharge liquid. However, in the related art, the piston pump has a large number of components, which increases the manufacturing cost. CONTENT OF THE INVENTION

[0004] Embodiments of the present application provide a piston pump and a clothes processing device, aiming to improve the problem of a large number of components of the piston pump.

[0005] In a first aspect, the embodiments of the present application provide a piston pump, comprising a pump body, a piston and a driving assembly. The pump body is of an integrated structure, and has a piston cavity. The piston is arranged in the piston cavity in a reciprocating sliding manner along the axial direction of the piston cavity. The driving assembly is connected to the pump body, and part of the driving assembly extends into the piston cavity to drive the piston to reciprocate. A pump head is connected to the pump body and has a liquid outlet and a liquid inlet, both of which are in communication with the piston cavity.

[0006] In some embodiments, the pump body has a first end close to the pump head and a second end away from the pump head along the sliding direction of the piston.

[0007] The piston cavity has a communication port through the first end of the pump body. The piston is assembled in the piston cavity through the communication port. The liquid outlet and the liquid inlet are in communication with the piston cavity through the communication port. The driving assembly is arranged closer to the second end than to the first end.

[0008] In some embodiments, the second end is provided with a liquid leakage hole in communication with the piston cavity.

[0009] In some embodiments, the driving assembly comprises a motor housing and a motor. The motor housing has a motor cavity. The motor is assembled in the motor cavity, and part of the motor extends into the piston cavity to drive the piston to reciprocate.

[0010] One of the inner wall surface of the motor shell and the outer wall surface of the motor has a buckle, the other of the inner wall surface of the motor shell and the outer wall surface of the motor is buckled with the buckle, so that the motor is limited in the motor cavity.

[0011] In some embodiments, a plurality of buckles are provided, and the plurality of buckles are arranged in a circumferential direction on the inner wall surface of the motor shell.

[0012] In some embodiments, the inner wall surface of the motor shell has the buckle, the buckle has a first guide surface slidingly matched with the motor, and the first guide surface gradually inclines to the central axis of the motor in a direction in which the motor is inserted into the motor cavity.

[0013] In some embodiments, the buckle further has a second guide surface slidingly matched with the motor, and the second guide surface gradually inclines to the central axis of the motor in a direction in which the motor is moved out of the motor cavity.

[0014] In some embodiments, the motor shell is provided with a wire hole, the wire hole communicates with the motor cavity, and the wire hole is used to lead out a power cable of the motor from the motor cavity.

[0015] In some embodiments, the pump body includes a pump cylinder shell and a motor seat, the pump cylinder shell has the piston cavity, and the motor seat is connected to the pump cylinder shell and has a mounting cavity, a bottom wall of the mounting cavity has a through hole communicating with the piston cavity.

[0016] Part of the drive assembly passes through the mounting cavity and the through hole to be connected with the piston.

[0017] In some embodiments, the motor seat includes a seat body and a mounting plate, the seat body is connected to the pump cylinder shell, the mounting plate is connected to the seat body, a first fixing hole is provided, and the mounting cavity is formed by the seat body and the mounting plate; the motor shell has a second fixing hole, and the piston pump further includes a fixing member passing through the first fixing hole and the second fixing hole.

[0018] In some embodiments, the outer wall surface of the motor shell is provided with a relief groove extending in the axial direction of the motor, the second fixing hole is located on the extension path of the relief groove, and the relief groove is used to avoid the fixing member inserted into the second fixing hole.

[0019] In some embodiments, one of the mounting plate and the motor is provided with a limiting protrusion, the other of the mounting plate and the motor is provided with a limiting hole, and the limiting protrusion is inserted into the limiting hole.

[0020] In some embodiments, the motor housing further has a groove arranged on a cavity wall of the motor cavity and in communication with the motor cavity; the motor is provided with a connecting lug, which is clamped in the groove;

[0021] The connecting lug has the limiting hole, and the mounting plate is provided with the limiting protrusion.

[0022] In some embodiments, a gap is formed between at least part of the limiting protrusion and a hole wall of the limiting hole.

[0023] In some embodiments, the motor housing is provided with a supporting lug, which is arranged opposite to the connecting lug; the supporting lug has the second fixing hole, the connecting lug has a third fixing hole, the third fixing hole is arranged in a spaced manner with the limiting hole, and the fixing member is sequentially clamped in the second fixing hole, the third fixing hole and the first fixing hole.

[0024] In some embodiments, an inner peripheral wall of the motor cavity has a foolproof groove; the mounting plate is provided with a foolproof part which is adapted to the foolproof groove and is clamped in the foolproof groove.

[0025] In some embodiments, the pump body further comprises a supporting rib plate connected to an outer peripheral wall of the seat body and an outer surface of the mounting plate which is away from the motor.

[0026] In some embodiments, the driving assembly further comprises a shaft sleeve which is sleeved on a motor shaft of the motor, rotatably arranged in the mounting cavity, and provided with a driving part on a side away from the motor; the driving part is clamped in the through hole and connected with the piston.

[0027] The outer peripheral wall of the shaft sleeve is annularly provided with a convex ring, and a diameter of the convex ring is greater than a diameter of the through hole, so that the convex ring abuts against a cavity bottom wall of the mounting cavity.

[0028] In some embodiments, the pump head is provided with a first foolproof notch, and the pump body is provided with a second foolproof notch; the first foolproof notch corresponds to the second foolproof notch.

[0029] In some embodiments, the pump head comprises a pump cover and a valve plate; the pump cover is provided with a liquid inlet channel in communication with the liquid inlet and a liquid outlet channel in communication with the liquid outlet; the valve plate is located between the pump cover and the pump body and has the liquid inlet and the liquid outlet.

[0030] The valve plate is provided with the first anti-fumble notch penetrating through the valve plate along the thickness direction of the valve plate, and the pump cover is provided with a third anti-fumble notch penetrating through the pump cover along the thickness direction of the pump cover, the third anti-fumble notch corresponding to the first anti-fumble notch.

[0031] In some embodiments, the valve plate is a rectangular plate, and the first anti-fumble notch is arranged at a corner of the valve plate.

[0032] In some embodiments, the pump body includes a pump cylinder shell having the piston cavity and the second anti-fumble notch, and a motor base connected to the pump cylinder shell and having a mounting cavity with a through hole in a cavity bottom wall thereof in communication with the piston cavity, wherein part of the drive assembly is arranged in the mounting cavity and the through hole to be connected to the piston.

[0033] In some embodiments, the pump cylinder shell includes a shell body having the piston cavity, a connecting plate connected to a first end of the shell body and having the second anti-fumble notch, and a plurality of spaced first connecting portions connected to an outer edge of the connecting plate and having first connecting holes.

[0034] The pump cover is provided with a second connecting portion opposite to the first connecting portion, the second connecting portion having a second connecting hole, and the piston pump further includes a connecting piece inserted into the first connecting hole and the second connecting hole to fixedly connect the pump cover and the connecting plate.

[0035] In some embodiments, the pump cover has a plurality of connecting grooves corresponding to the plurality of second connecting portions one by one, and the first connecting portion is arranged in the connecting groove so that the end surface of the first connecting portion is in abutment with the end surface of the second connecting portion.

[0036] In some embodiments, an outer edge of the valve plate has a plurality of limiting notches in limiting cooperation with part of the outer peripheral wall of the first connecting portion.

[0037] In some embodiments, a side of the pump cover facing the connecting plate is provided with a receiving groove, and the valve plate is at least partially located in the receiving groove.

[0038] One of the pump cover and the connecting plate is provided with a buckling portion, and the other of the pump cover and the connecting plate is provided with a buckling hole, and part of the buckling portion is buckled into the buckling hole.

[0039] In some embodiments, the connecting plate is provided with the clamping portion, and the clamping portion has a first guide slope.

[0040] The pump cover is provided with the clamping hole, and the clamping hole has a second guide slope. During the process of clamping the clamping portion into the clamping hole, the clamping portion slides and abuts on the first guide slope and the second guide slope.

[0041] In some embodiments, the connecting plate has a first sealing groove and a communication port, the communication port is in communication with the piston cavity, and the first sealing groove is annularly arranged at the periphery of the communication port. The piston pump further comprises a first sealing member embedded in the first sealing groove, and the first sealing member is used to seal the connecting plate and the valve plate.

[0042] In some embodiments, the valve plate is provided with an annular first blocking portion on the side facing the connecting plate. The first blocking portion extrudes the first sealing member in the direction of the first sealing groove, so as to abut the first sealing member against the groove bottom wall of the first sealing groove.

[0043] In some embodiments, the connecting plate is provided with a plurality of lightening grooves, and the plurality of lightening grooves are arranged at intervals along the outer peripheral side of the first sealing groove.

[0044] In some embodiments, the pump head comprises a pump cover and a valve plate. The pump cover is connected with the pump body. The valve plate is located between the pump cover and the pump body, and has the liquid outlet and the liquid inlet which are both in communication with the piston cavity.

[0045] At least one of the valve plate and the pump cover is provided with a foolproof hole, and at least one of the valve plate and the pump cover is provided with a foolproof protrusion, and the foolproof protrusion is clamped in the foolproof hole.

[0046] In some embodiments, the pump cover is provided with a clamping hole, and the valve plate comprises a plate body and a cantilever clamping hook. The plate body has the liquid inlet and the liquid outlet arranged at intervals. One end of the cantilever clamping hook is connected with the plate body at an angle, and the other end is clamped and connected with the clamping hole.

[0047] In some embodiments, the cantilever clamping hook comprises a plug-in portion and a hooking portion. One end of the plug-in portion is connected with the plate body and extends towards the pump cover and is arranged in the clamping hole. The hooking portion is connected with the other end of the plug-in portion and hooks with the outer wall surface of the pump cover.

[0048] In some embodiments, the cantilever clamping hook is provided with two cantilever clamping hooks, and the two cantilever clamping hooks are diagonally arranged.

[0049] The foolproof protrusions are arranged in two pairs, and the two pairs of foolproof protrusions are arranged diagonally.

[0050] The two cantilever hooks and the two foolproof protrusions are respectively located at four corners of the plate body.

[0051] In some embodiments, the pump cover is provided with a liquid inlet channel communicating with the liquid inlet, and a liquid outlet channel communicating with the liquid outlet; the pump cover comprises:

[0052] The cover body has a receiving groove and a second sealing groove in communication with each other, the plate body is received in the receiving groove, the outlet of the liquid inlet channel is arranged on the groove bottom wall of the receiving groove and communicates with the liquid inlet, the inlet of the liquid outlet channel is arranged on the groove bottom wall of the receiving groove and communicates with the liquid outlet, and the second sealing groove is arranged around the outlet of the liquid inlet channel and the inlet of the liquid outlet channel;

[0053] The piston pump further comprises a second sealing member embedded in the second sealing groove, the second sealing member is used for sealingly connecting the cover body and the plate body, and sealing the communication between the outlet of the liquid inlet channel and the liquid inlet and the communication between the inlet of the liquid outlet channel and the liquid outlet.

[0054] In some embodiments, the valve plate further comprises a second sealing portion connected to one side of the plate body facing the second sealing groove, the second sealing portion extrudes the second sealing member in the direction of the second sealing groove, so as to abut the second sealing member against the groove bottom wall of the second sealing groove.

[0055] In some embodiments, the second sealing member comprises a first sealing portion and a second sealing portion interconnected as a whole, the first sealing portion is arranged around the inlet of the liquid outlet channel, and the second sealing portion is arranged around the outlet of the liquid inlet channel.

[0056] In some embodiments, the piston pump further comprises a liquid inlet one-way valve connected to the plate body and used for opening and closing the liquid inlet, and a liquid outlet one-way valve connected to the plate body away from the liquid inlet one-way valve and used for opening and closing the liquid outlet.

[0057] In some embodiments, the valve plate further comprises a first stop portion connected to one side of the plate body and arranged adjacent to the liquid inlet, and a second stop portion connected to the other side of the plate body and arranged away from the first stop portion and adjacent to the liquid outlet.

[0058] The first stop portion is located within a projection of the inlet liquid one-way valve on the plate body, and the second stop portion is located within a projection of the outlet liquid one-way valve on the plate body.

[0059] In some embodiments, the pump head has a first assembly hole, the pump body has two second assembly holes, the first assembly hole and the second assembly holes are used for assembly with the clothes treatment agent box, the projection of the first assembly hole along the axial direction of the piston cavity falls between the two second assembly holes, and the line between the two second assembly holes is arranged at an angle with the axial direction of the piston cavity.

[0060] In some embodiments, the axial direction of the piston cavity passes through the first assembly hole.

[0061] In some embodiments, the two second assembly holes are arranged symmetrically along the vertical plane in which the axial direction of the piston cavity is located.

[0062] In some embodiments, the pump body comprises a pump cylinder, a motor seat, and two assembly seats, the pump cylinder has the piston cavity; the motor seat is connected to the pump cylinder, the motor seat has a mounting cavity, the cavity bottom wall of the mounting cavity has a through hole in communication with the piston cavity, and part of the drive assembly passes through the mounting cavity and the through hole to be connected with the piston; the two assembly seats are respectively connected to the two sides of the pump cylinder and are located between the pump head and the motor seat along the axial direction of the piston cavity, and each assembly seat has at least one second assembly hole.

[0063] In some embodiments, the assembly seat further has a positioning hole, the positioning hole is arranged at intervals with the second assembly hole, and the positioning hole is used for realizing pre-positioning with the clothes treatment agent box.

[0064] In some embodiments, the pump head comprises a pump cover and a valve plate, the pump cover is provided with an inlet liquid passage in communication with the inlet liquid port and an outlet liquid passage in communication with the outlet liquid port; the valve plate is located between the pump cover and the pump body and has the inlet liquid port and the outlet liquid port.

[0065] The first assembly hole is arranged on the pump cover and is located between the inlet liquid passage and the outlet liquid passage.

[0066] In some embodiments, the pump cover comprises a cover body, an inlet liquid pump nozzle and an outlet liquid pump nozzle, and a connecting plate, the cover body has a receiving groove for accommodating the valve plate; the inlet liquid pump nozzle and the outlet liquid pump nozzle are connected to the side of the cover body away from the receiving groove, the inlet liquid pump nozzle has the inlet liquid passage, and the outlet liquid pump nozzle has the outlet liquid passage; the connecting plate is connected to the inlet liquid pump nozzle and the outlet liquid pump nozzle and is located between the inlet liquid pump nozzle and the outlet liquid pump nozzle, and the connecting plate has the first assembly hole.

[0067] In some embodiments, the bridge plate comprises a first plate body and a second plate body, the first plate body is connected to the cover body and extends away from the accommodating groove, and the second plate body is arranged on the first plate body in a stacked manner.

[0068] The first assembly hole penetrates through the first plate body and the second plate body.

[0069] In some embodiments, the cover body, the liquid inlet pump nozzle and the liquid outlet pump nozzle, and the bridge plate are integrally formed.

[0070] In some embodiments, the piston cavity has a communication port at one end of the pump body, and the piston is provided with an assembly portion on the side facing the communication port, which is used to cooperate with an external assembly tool to enable the piston to be installed in the piston cavity.

[0071] In some embodiments, the assembly portion is one of an internal hexagonal groove, a straight slot, or a cross slot.

[0072] In some embodiments, the piston comprises a guide body, a plug body, and a reinforcing rib, the guide body is in sliding cooperation with the inner wall of the piston cavity, the plug body is connected to the end of the guide body and has the assembly portion, and the cross-sectional area of the plug body is greater than that of the guide body, and the reinforcing rib is connected to the guide body and the plug body.

[0073] In some embodiments, the outer peripheral wall of the plug body is provided with a third sealing groove, and the piston pump further comprises a third sealing member embedded in the third sealing groove, which is used to seal the plug body and the inner wall of the piston cavity.

[0074] In some embodiments, the guide body is provided with a first guide portion, and the inner wall of the piston cavity is provided with an axially extending first guide rail, and the first guide portion is slidably arranged in the first guide rail.

[0075] In some embodiments, the assembly portion is a straight slot, the length direction of the straight slot is perpendicular to the extension direction of the first guide portion, and the central axis of the first guide portion is located in the vertical plane in which the axial direction of the piston cavity is located.

[0076] In some embodiments, the inner wall of the piston cavity is further provided with a second guide rail and a third guide rail arranged oppositely, and the second guide rail and the third guide rail are both arranged in the axial direction of the piston cavity.

[0077] The guide body is further provided with a second guide part and a third guide part, the second guide part and the third guide part are respectively located on two sides of the guide body, and the second guide part and the third guide part are respectively slidably connected to the second guide rail and the third guide rail.

[0078] In some embodiments, the guide body is provided with two oil storage grooves, the two oil storage grooves are respectively arranged adjacent to the second guide part and the third guide part along the axial direction of the piston cavity, and the oil storage grooves are used to collect the lubricating medium in the piston cavity.

[0079] In a second aspect, the embodiments of the present application provide a clothes treatment device, which comprises a main body, a clothes treatment agent box and the piston pump as any one of the above, the main body comprises a shell and a cylinder assembly arranged in the shell; the clothes treatment agent box has a liquid storage cavity and is arranged on the shell; the piston pump is connected to the clothes treatment agent box, the liquid inlet is in communication with the liquid storage cavity, and the liquid outlet is in communication with the cylinder assembly.

[0080] In the related art, in order to install the piston into the piston cavity, the pump body is generally provided in a split type, and a cover is provided to cooperatively form the piston cavity with other parts, and an end cover for assembling the driving assembly is also provided in the related art to enable the driving assembly to be connected to a predetermined position.

[0081] The pump body in the embodiments of the present application is a one-piece structure having the piston cavity, which can reduce the connection points, thereby reducing the possible leakage points and failure points, enabling the pump body to withstand longer use, and improving the stability and reliability of the overall structure of the piston pump.

[0082] The driving assembly is connected to the pump body, and part of the driving assembly extends into the piston cavity to drive the piston to reciprocate, so that the reciprocating movement of the piston is stable, and by using part of the pump body as a mounting member of the driving assembly, the number of components of the piston pump is reduced, and the assembly process is simplified. Due to the reduction in the number of components, the manufacturing cost is also reduced, including not only the material cost but also the reduced processing and assembly cost. BRIEF DESCRIPTION OF DRAWINGS

[0083] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort.

[0084] Figure 1 A structural schematic diagram of a piston pump provided by an embodiment of the present application is shown in the figure.

[0085] Figure 2 Fig. 1 is a perspective view of a piston pump according to an embodiment of the present application; Figure 1 Fig. 2 is a partial exploded view of the piston pump of Fig. 1;

[0086] Figure 3 Fig. 3 is an exploded view of the piston pump of Fig. 1; Figure 1 Fig. 4 is a perspective view of the piston pump of Fig. 1;

[0087] Figure 4 Fig. 5 is an exploded view of the piston pump of Fig. 1 (omitting the pump head);

[0088] Figure 5 Fig. 6 is an exploded view of the piston pump of Fig. 1 (omitting the drive assembly);

[0089] Figure 6 Fig. 7 is a perspective view of a motor housing according to an embodiment of the present application;

[0090] Figure 7 Fig. 8 is a perspective view of a pump body according to an embodiment of the present application;

[0091] Figure 8 Fig. 9 is a perspective view of the pump body of Fig. 8 from another angle;

[0092] Figure 9 Fig. 10 is an exploded view of the piston pump of Fig. 1 (omitting the pump body);

[0093] Figure 10 Fig. 11 is an exploded view of the piston pump of Fig. 1 (omitting the pump head);

[0094] Figure 11 Fig. 12 is a perspective view of a valve plate according to an embodiment of the present application;

[0095] Figure 12 Fig. 13 is a perspective view of a pump cover according to an embodiment of the present application;

[0096] Figure 13 Fig. 14 is a perspective view of the pump cover of Fig. 13 from another angle;

[0097] Figure 14 Fig. 15 is an exploded view of a piston and pump body according to an embodiment of the present application;

[0098] Figure 15 Fig. 16 is an exploded view of a piston and third seal according to an embodiment of the present application.

[0099] BRIEF DESCRIPTION OF THE DRAWINGS:

[0100] 100, piston pump; 10, pump body; 10a, piston cavity; 10b, liquid leakage hole; 10c, second fool-proof notch; 11, pump cylinder shell; 111, shell body; 1111, first guide rail; 1112, second guide rail; 1113, third guide rail; 112, connecting plate; 112a, communication port; 112b, first sealing groove; 112c, weight-reducing groove; 1121, buckling part; 1121a, first guide inclined surface; 113, first connecting part; 113a, first connecting hole; 12, motor seat; 12a, mounting cavity; 12b, through hole; 121, seat body; 122, mounting plate; 122a, first fixing hole; 1221, limiting protrusion; 1222, fool-proof part; 20, piston; 20a, driving groove; 21, guide body; 21a, oil storage groove; 211, first guide part; 212, second guide part; 213, third guide part; 22, plug body; 22a, third sealing groove; 221, assembly part; 23, reinforcing rib; 13, support rib plate; 14, assembly seat; 14a, second assembly hole; 14b, positioning hole; 30, driving assembly; 31, motor shell; 31a, motor cavity; 31b, wire passing hole; 31c, avoiding groove; 31d, groove; 31e, fool-proof groove; 311, supporting lug; 311a, second fixing hole; 32, motor; 321, connecting lug; 321a, limiting hole; 321b, third fixing hole; 33, buckle; 331, first guide surface; 332, second guide surface; 34, shaft sleeve; 341, driving part; 342, protruding ring; 40, pump head; 41, pump cover; 41a, liquid inlet channel; 41b, liquid outlet channel; 41c, third fool-proof notch; 41d, connecting groove; 41e, accommodating groove; 41f, fool-proof hole; 41g, clamping hole; 41h, buckling hole; 41h1, second guide inclined surface; 411, cover body; 411a, second sealing groove; 412, second connecting part; 412a, second connecting hole; 413, liquid inlet pump nozzle; 414, liquid outlet pump nozzle; 415, bridging plate; 415a, first assembly hole; 416, reinforcing seat; 42, valve plate; 42a, liquid inlet; 42b, liquid outlet; 42c, first fool-proof notch; 42d, limiting notch; 421, plate body; 422, first plugging part; 423, fool-proof protrusion; 424, cantilever clamping hook; 4241, insertion part; 4242, hooking part; 425, second plugging part; 426, first stop part; 427, second stop part; 50, fixing piece; 60, connecting piece; 70, first sealing piece; 80, second sealing piece; 81, first sealing part; 82, second sealing part; 90, third sealing piece; 91, liquid inlet one-way valve; 92, liquid outlet one-way valve. DETAILED DESCRIPTION

[0101] In order to make the purposes, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application and not to limit the present application.

[0102] The embodiments of the present application relate to a clothes treatment device. At present, there are many types of clothes treatment devices, which are generally classified into washing machines, clothes dryers, and spin dryers according to functions. Among them, the washing machine is used for automatically washing clothes, and the washing machine is generally divided into a drum washing machine and an impeller washing machine. The drum washing machine and the fully automatic impeller washing machine are usually provided with an automatic dispensing system for dispensing detergent into a drum assembly, so that various detergents such as laundry liquid and softener added from outside are flushed into the drum assembly by water to achieve cleaning and washing of clothes.

[0103] The embodiments will be described below taking the clothes treatment device as a washing machine for example, and other clothes treatment devices can be considered similarly.

[0104] Please refer to Figure 1 , Figure 2 and Figure 3 , the clothes treatment device includes a main body, a clothes treatment agent box, and a piston pump 100. The main body includes a shell and a drum assembly arranged in the shell. The shell is an external structure of the clothes treatment device, which protects the internal structure from the influence of the external environment. The drum assembly provides a space in which the user can put clothes for cleaning. The clothes can be washed and rinsed in the drum assembly by the action of rotation and water flow. The clothes treatment agent box is arranged on the shell and has a storage cavity for storing clothes treatment agents such as detergents, softeners, and bleaching agents. The storage cavity can be divided into multiple compartments, each of which is used to store different clothes treatment agents. The piston pump 100 is a component for accurately controlling the dispensing of clothes treatment agents, which can reduce waste and inaccuracy when the user manually dispenses. The piston pump 100 is connected to the clothes treatment agent box. The piston pump 100 has a liquid inlet 42a and a liquid outlet 42b. The liquid inlet 42a is in one-way communication with the storage cavity, and the liquid outlet 42b is in one-way communication with the drum assembly. The piston pump 100 can extract clothes treatment agents from the storage cavity and deliver them to the drum assembly, and ensure that the clothes treatment agents can only flow in one direction and cannot flow in the opposite direction, thereby avoiding the backflow of clothes treatment agents into the storage cavity during the operation of the washing machine, which affects the washing effect.

[0105] The user needs to add clothes treatment agents to the clothes treatment agent box, and the piston pump 100 can automatically complete the dispensing work without the need for manual addition each time the clothes are washed, thereby improving the convenience. And through the accurate control of the piston pump 100, the clothes treatment agents can be released into the drum assembly at the appropriate time during the washing process, thereby improving the washing effect.

[0106] Please continue to refer to Figure 2 andFigure 3 The present application provides a piston pump 100 applied to a clothes treatment device, the piston pump 100 comprising a pump body 10, a piston 20, a driving assembly 30 and a pump head 40, the pump body 10 is a shell of a piston cavity 10a, having the piston cavity 10a, the piston 20 is arranged in the piston cavity 10a, that is, the pump body 10 provides space for the movement of the piston 20, the pump body 10 can be a stainless steel pump body, a cast iron pump body or an alloy steel pump body, having certain corrosion resistance, suitable for carrying clothes treatment agent, improving the durability of the pump body 10.

[0107] The piston 20 can be reciprocally slidably arranged in the piston cavity 10a along the axial direction of the piston cavity 10a, and it can be understood that a pump cavity is formed between the end of the piston 20 and the pump head 40, and the piston 20 can change the volume of the pump cavity in reciprocally sliding to realize the suction or discharge of the clothes treatment agent.

[0108] The pump head 40 is connected to the pump body 10, and the pump head 40 has a liquid outlet 42b and a liquid inlet 42a both communicating with the piston cavity 10a, specifically, when the piston 20 moves away from the pump head 40, the pump cavity generates negative pressure to suck the clothes treatment agent from the clothes treatment agent box into the pump cavity through the liquid inlet 42a; when the piston 20 moves towards the pump head 40, the pressure in the pump cavity increases to push the clothes treatment agent out of the liquid outlet 42b and deliver it to the drum assembly through the pump head 40, realizing the automatic dispensing of the clothes treatment agent.

[0109] In the related art, in order to install the piston 20 into the piston cavity 10a, the pump body 10 is generally provided in a split type, for example, one cover is provided to jointly construct the piston cavity 10a with other parts, and an end cover for assembling the driving assembly 30 is also provided in the related art to connect the driving assembly 30 to a predetermined position.

[0110] In the embodiment, the pump body 10 is a one-piece structure, directly constructing the piston cavity 10a, which can reduce the connection points between different parts, thereby reducing possible leakage points and failure points, making it able to withstand longer use, improving the stability and reliability of the overall structure of the piston pump 100. The driving assembly 30 is connected to the pump body 10, and part of the driving assembly 30 extends into the piston cavity 10a to drive the piston 20 to reciprocally slide, so that the reciprocating movement of the piston 20 runs smoothly. By using part of the pump body 10 as a mounting member of the driving assembly 30, the number of parts of the piston pump 100 is reduced, and the assembly process is simplified. Due to the reduction in the number of parts, the manufacturing cost is also reduced, including the cost of materials, processing and assembly.

[0111] Please continue to refer to Figure 2 and Figure 3Understandably, along the sliding direction of the piston 20, the pump body 10 has a first end close to the pump head 40 and a second end away from the pump head 40, it is necessary to point out that in actual use, the piston pump 100 is installed vertically, the first end is located above the second end, that is, the pump head 40 is located above, wherein the piston cavity 10a has a communication port 112a penetrating the first end of the pump body 10, in the installation process, the piston 20 can be installed in the piston cavity 10a through the communication port 112a, the above-mentioned liquid inlet port 42a and the liquid inlet port 42a are communicated with the piston cavity 10a through the communication port 112a, and the driving assembly 30 is arranged closer to the second end than the first end, that is, the driving assembly 30 and the pump head 40 are located at the parts close to the top and bottom of the piston pump 100 respectively, which can effectively utilize the space and reduce the occupied space of the piston pump 100.

[0112] The piston pump 100 further comprises a liquid inlet one-way valve 91 and a liquid outlet one-way valve 92, the liquid inlet one-way valve 91 is connected to the valve plate 42 and is used to open and close the liquid inlet port 42a, the liquid inlet one-way valve 91 allows the clothes treatment agent to flow from the clothes treatment cavity to the piston cavity 10a through the liquid inlet port 42a, and prevents the liquid from flowing back to the clothes treatment cavity in the opposite direction. The liquid outlet one-way valve 92 is connected to the side of the valve plate 42 away from the liquid inlet one-way valve 91 and is used to open and close the liquid outlet port 42b, the liquid outlet one-way valve 92 allows the clothes treatment agent to flow from the piston cavity 10a to the drum assembly through the liquid outlet port 42b, and prevents the liquid from flowing back to the piston cavity 10a in the opposite direction. The arrangement of the liquid inlet one-way valve 91 and the liquid outlet one-way valve 92 can make the flow of the clothes treatment agent in the piston cavity 10a one-way, reducing the backflow phenomenon when the piston pump 100 stops working.

[0113] Please continue to refer to Figure 2 and Figure 3 In some embodiments, the pump body 10 comprises a pump cylinder 11 and a motor base 12, the pump cylinder 11 has the piston cavity 10a, that is, the pump cylinder 11 is used to accommodate the movement of the piston 20 and can bear the temporary storage of the clothes treatment agent. The pump cylinder 11 can be designed as a cylindrical shell, which helps to uniformly distribute the pressure inside the pump cylinder 11 and reduce local stress concentration. Understandably, the pump cylinder 11 and the motor base 12 are integrally formed, which reduces the risk of leakage of the clothes treatment agent in the piston cavity 10a and improves the reliability of the piston pump 100; it can also improve the overall strength and stability of the pump body 10, so that it can withstand greater pressure and impact.

[0114] The motor base 12 provides a mounting space for the drive assembly 30, and can protect the drive assembly 30 from displacement caused by external impact. The motor base 12 is connected to the pump cylinder 11, specifically to the outer peripheral wall of the pump cylinder 11, so that the drive assembly 30 is stably connected to the pump body 10. The motor base 12 has a mounting cavity 12a, and part of the drive assembly 30 can be mounted in the mounting cavity 12a. The cavity bottom wall of the mounting cavity 12a has a through hole 12b that is in communication with the piston cavity 10a. Part of the drive assembly 30 passes through the mounting cavity 12a and the through hole 12b and extends into the piston cavity 10a to connect with the piston 20, ensuring that the piston 20 can smoothly reciprocate.

[0115] Please refer to Figure 4 and Figure 5 In some embodiments, the motor base 12 includes a base body 121 and a mounting plate 122. The base body 121 is connected to the pump cylinder 11 and extends radially away from the pump cylinder 11. The mounting plate 122 is connected to the side of the base body 121 away from the pump cylinder 11. The base body 121 and the mounting plate 122 together form the mounting cavity 12a, which provides a stable mounting space for the drive assembly 30.

[0116] The motor base 12 also includes a support rib plate 13. The support rib plate 13 is connected to the outer peripheral wall of the base body 121 and the outer surface of the mounting plate 122 away from the drive assembly 30. The support rib plate 13 can increase the contact area between the mounting plate 122 and the base body 121, provide additional support points, enhance the connection strength between the base body 121 and the mounting plate 122, effectively improve the overall rigidity of the motor base 12, enhance the stability of the motor base 12, reduce the deformation of the motor base 12 that may occur during operation of the piston pump 100, and thus improve the durability and reliability of the motor base 12.

[0117] It can be understood that the support rib plate 13 is provided in multiple, and the multiple support rib plates 13 are respectively connected to the two sides of the base body 121 and the mounting plate 122, which improves the load capacity of the motor base 12 and makes the installation of the drive assembly 30 more stable.

[0118] Please continue to refer to Figure 4 and Figure 5 In some embodiments, the drive assembly 30 includes a motor housing 31 and a motor 32. The motor housing 31 has a motor cavity 31a, and the motor 32 is assembled in the motor cavity 31a. The motor 32 is used to drive the piston 20 to reciprocate. The motor housing 31 provides a safety barrier for the internal motor 32. It can be understood that the motor housing 31 can be a high-strength plastic shell, which has sufficient strength and durability to protect the internal motor 32, and is relatively light and has good insulation.

[0119] The motor housing 31 also has a wire hole 31b provided on the peripheral side wall of the motor housing 31, which is in communication with the motor cavity 31a and is used to lead out the power cable of the motor 32 from the motor cavity 31a, so that the leading out and layout of the power cable of the motor 32 are more orderly, the entanglement between the cables is reduced, and the neatness and aesthetics of the piston pump 100 are improved.

[0120] Please continue to refer to Figure 4 and Figure 5 In order to enable the motor 32 to be limited in the motor housing 31 when the motor 32 is assembled with the motor housing 31, one of the inner wall surface of the motor housing 31 and the outer wall surface of the motor 32 has a buckle 33, which is buckled with the other of the inner wall surface of the motor housing 31 and the outer wall surface of the motor 32, so as to limit the motor 32 in the motor cavity 31a. The design of the buckle 33 makes the assembly process of the motor 32 and the motor housing 31 more simple and fast, can prevent the motor 32 from being separated from the motor housing 31, and improves the safety of the operation of the motor 32. And the disassembly process of the buckle 33 is also simple, so that the motor 32 can be quickly taken out of the motor housing 31 when maintenance or replacement is needed, improving the maintenance efficiency.

[0121] In one arrangement, when the outer wall surface of the motor 32 is configured to have the buckle 33, correspondingly, the inner wall surface of the motor housing 31 is provided with a clamping groove capable of being clamped by the buckle 33. When assembling, the motor 32 is pushed to the inner wall surface of the motor housing 31 by a proper force, so that the buckle 33 is tightly clamped with the clamping groove.

[0122] In another arrangement, when the inner wall surface of the motor housing 31 is configured to have the buckle 33, the buckle 33 can be tightly engaged with the bottom of the motor 32 after the motor 32 is pushed into the motor cavity 31a. Understandably, the buckle 33 can be provided with a plurality of buckles 33, which are arranged in a circumferential direction along the inner wall surface of the motor housing 31. The main part of the motor 32 is limited in the motor cavity 31a, and the plurality of buckles 33 can uniformly bear the load, reduce the stress concentration phenomenon of the single buckle 33, and the plurality of buckles 33 can increase the number of contact points and improve the connection reliability between the motor 32 and the motor housing 31. The buckle 33 can be provided with two, three or four, which is not limited in the present application.

[0123] As Figure 5 and Figure 6As shown, specifically, the buckle 33 has a first guide surface 331 slidingly matched with the motor 32, the first guide surface 331 gradually inclines to the central axis of the motor 32 in the direction of inserting the motor 32 into the motor cavity 31a, the first guide surface 331 is arranged so that the motor 32 can be more smoothly and easily inserted into the motor cavity 31a, reducing the friction and resistance in the assembly process, simplifying the assembly process, making the assembly of the motor 32 more simple.

[0124] Further, the buckle 33 also has a second guide surface 332 slidingly matched with the motor 32, the second guide surface 332 gradually inclines to the central axis of the motor 32 in the direction of moving the motor 32 out of the motor cavity 31a, the first guide surface 331 is arranged closer to the mounting plate 122 than the second guide surface 332, the second guide surface 332 is used to guide the motor 32 to move out of the motor cavity 31a, reducing the friction and resistance in the disassembly process of the motor 32, which can reduce the damage caused in the disassembly process, thereby prolonging the service life of the motor 32.

[0125] As shown in Figure 5 , Figure 6 and Figure 7 , in order to stably connect the motor housing 31 to the pump body 10, specifically to the mounting plate 122, the mounting plate 122 is provided with a first fixing member 50, and the motor housing 31 has a second fixing hole 311a, and the piston pump 100 further comprises a fixing member 50, which is arranged in the first fixing hole 122a and the second fixing hole 311a, so as to lock the motor housing 31 and the pump body 10, forming a stable connection, reducing the situation that the driving assembly 30 is loose due to vibration or impact during the operation of the washing machine.

[0126] Understandably, the first fixing hole 122a and the second fixing hole 311a can be threaded holes, and the fixing member 50 is a bolt, which can be assembled quickly, and can provide convenience for the installation and disassembly of the driving assembly 30 and the pump body 10, and also reduce the difficulty of subsequent maintenance.

[0127] It should be noted that the end surface of the mounting plate 122 facing the motor housing 31 is a plane, which can be supported on the end surface of the motor housing 31 and the bottom of the motor 32, the plane provides a flat and stable contact surface, which can provide stable support, facilitate quick alignment during assembly, help reduce errors during installation, making installation more convenient. It is also helpful to reduce the noise and vibration generated by the driving assembly 30 during operation.

[0128] In addition, in order to further improve the accuracy and convenience of assembly, one of the mounting plate 122 and the motor 32 is provided with a limiting protrusion 1221, and the other of the mounting plate 122 and the motor 32 is provided with a limiting hole 321a, the limiting protrusion 1221 is inserted into the limiting hole 321a, and the limiting protrusion 1221 and the limiting hole 321a are designed to cooperate, so that the mounting plate 122 and the motor 32 can be accurately positioned during assembly, reducing assembly errors. Allow the motor 32 to be in the correct pre-installation position before it is completely fixed, thereby simplifying the assembly steps. During the process of penetrating and locking the fixing member 50, due to the accuracy of the pre-positioning, a single person can complete the entire assembly without additional assistance.

[0129] And the cooperation of the limiting protrusion 1221 and the limiting hole 321a increases the stability between the mounting plate 122 and the motor 32, reduces the relative movement of the two during the operation of the piston pump 100, and prolongs the service life of the piston pump 100.

[0130] As shown in Figure 5 , Figure 6 and Figure 7 In some embodiments, the inner peripheral wall of the motor cavity 31a has a foolproof groove 31e; the mounting plate 122 is provided with a foolproof part 1222 adapted to the foolproof groove 31e, the foolproof part 1222 is embedded in the foolproof groove 31e, and through the cooperation of the foolproof groove 31e and the foolproof part 1222, it can be ensured that the motor 32 is correctly positioned during assembly, which can reduce the uncertainty and operation difficulty of the user when assembling the motor 32. In practical application, the foolproof groove 31e can be an arc-shaped groove provided on the inner wall of the motor cavity 31a, and the foolproof part 1222 is an arc-shaped plate adapted to the arc-shaped groove. The arc-shaped plate can be embedded in the arc-shaped groove. Since the arc-shaped plate protrudes from the mounting plate 122, if the user does not align the installation in the circumferential direction, the arc-shaped plate will abut against the bottom wall of the motor housing 31, providing a physical barrier. The user can quickly identify the problem with the assembly, improving the user's assembly efficiency.

[0131] In order to realize the circumferential positioning between the motor 32 and the motor housing 31, the motor housing 31 further has a groove 31d provided on the cavity wall of the motor cavity 31a and located on the side close to the mounting plate 122, the groove 31d communicates with the motor cavity 31a, and the motor 32 is provided with a connecting lug 321 located on the outer periphery of the motor 32 and close to the mounting plate 122, the connecting lug 321 can be clamped in the groove 31d, so that the motor 32 is correctly positioned in the motor housing 31, improving the assembly accuracy and consistency, and also reducing the risk of displacement of the piston pump 100 due to vibration or impact during operation.

[0132] And the motor housing 31 is provided with the lug 311, the lug 311 and the connecting lug 321 are oppositely arranged, the lug 311 has the second fixing hole 311a, the connecting lug 321 has the third fixing hole 321b, the third fixing hole 321b is arranged with the spacing block, and the fixing part 50 is sequentially provided with the second fixing hole 311a, the third fixing hole 321b and the first fixing hole 122a, forming a firm connecting structure, effectively fixing the motor housing 31 and the motor 32 on the mounting plate 122, and enhancing the connection stability between the driving assembly 30 and the pump body 10.

[0133] Understandably, in order to increase the stability of the connection between the motor housing 31, the motor 32 and the mounting plate 122, the connecting lug 321 and the lug 311 are both provided with two, the two connecting lugs 321 are symmetrically arranged on the radial sides of the motor 32, and the two lugs 311 are symmetrically arranged on the radial sides of the motor housing 31, and the mounting plate 122 includes a main plate and two side plates, the main plate can be semicircular, and the side plates are respectively connected to the two sides of the main plate and oppositely arranged with the connecting lug 321, increasing the connection points, improving the reliability of the connection between the driving assembly 30 and the mounting plate 122, and helping to balance the load of the motor 32 in operation, reducing the wear caused by uneven load.

[0134] Exemplarily, the connecting lug 321 is provided with a limiting hole 321a, and the mounting plate 122 is provided with a limiting protrusion 1221, the limiting protrusion 1221 is protruding on the side of the mounting plate 122 facing the connecting lug 321, it should be noted that there is a gap between at least part of the limiting protrusion 1221 and the hole wall of the limiting hole 321a, which can provide a certain vibration space for the vibration generated during the operation of the motor 32, so that the limiting protrusion 1221 does not completely limit the slight movement of the motor 32, the existence of the gap reduces the rigid contact between the motor 32 and the mounting plate 122, and the motor 32 can operate more stably, and the wear caused by vibration in long-term operation is also reduced.

[0135] In one form of arrangement, the limiting protrusion 1221 is a one-half cylindrical protrusion (such as Figure 7 ), that is, the limiting protrusion 1221 is a semicylinder, which can be more easily aligned and inserted into the limiting hole 321a during assembly, reducing assembly time; on the other hand, there is a gap between the semicylinder and the limiting hole 321a, allowing the motor 32 to have a certain vibration space during operation, reducing the structural damage caused by vibration.

[0136] Further, in order to avoid the assembly of the fixing member 50, avoid the interference between the fixing member 50 and the outer wall surface of the motor housing 31, the outer wall surface of the motor housing 31 is provided with an avoiding groove 31c, the avoiding groove 31c is arranged along the axial direction of the motor 32, the second fixing hole 311a is located on the extension path of the avoiding groove 31c, and the avoiding groove 31c is used for avoiding the fixing member 50 inserted into the second fixing hole 311a, so that the fixing member 50 can smoothly pass through the second fixing hole 311a without colliding with the outer wall surface of the motor housing 31.

[0137] The avoiding groove 31c provides a clear assembly path, the fixing member 50 can be inserted into the second fixing hole 311a along the preset assembly path, and the assembly difficulty is reduced. Moreover, the avoiding groove 31c is arranged, that is, the extension length of the lug 311 and the connecting lug 321 is not too long, that is, the second fixing hole 311a is arranged too far from the main body part of the motor housing 31, which reduces the structural strength and affects the stability of the assembly. The avoiding groove 31c can improve the compactness of the piston pump 100.

[0138] Please continue to refer to Figure 5 、 Figure 6 and Figure 7 In some embodiments, the seat body 121 has the through hole 12b described above, and the drive assembly 30 further comprises a shaft sleeve 34, the shaft sleeve 34 is sleeved on the motor shaft of the motor 32. Since the shaft sleeve 34 is directly connected with the motor shaft, energy loss can be reduced and transmission efficiency can be improved. The shaft sleeve 34 is rotatably arranged in the mounting cavity 12a under the drive of the motor shaft of the motor 32, and the side away from the motor 32 of the shaft sleeve 34 is eccentrically provided with a driving part 341, the driving part 341 penetrates through the through hole 12b and is connected with the piston 20. Specifically, the piston 20 can be provided with a driving groove 20a, the driving groove 20a is arranged perpendicularly to the axial direction of the piston cavity 10a and extends transversely along the width direction of the piston 20, and part of the driving part 341 can be inserted into the driving groove 20a. When the motor shaft of the motor 32 rotates, the driving part 341 moves along a circular path, the radius of the circular path is the distance from the center of the driving part 341 to the center of the motor shaft, and the driving part 341 is connected with the driving groove 20a, so that the piston 20 is pushed to move linearly along the piston cavity 10a.

[0139] The outer peripheral wall of the shaft sleeve 34 is annularly provided with a convex ring 342, the diameter of the convex ring 342 is greater than the diameter of the through hole 12b, so that the lower end surface of the convex ring 342 abuts against the cavity bottom wall of the mounting cavity 12a. The convex ring 342 provides an additional supporting point, enhances the connection strength between the shaft sleeve 34 and the seat body 121, can limit the shaft sleeve 34, prevents the shaft sleeve 34 from falling completely into the piston cavity 10a, correctly positions the shaft sleeve 34 on the seat body 121, and enables the driving part 341 to correctly connect with the piston 20 to play its role.

[0140] In actual use, the liquid inlet 42a needs to be communicated with the liquid storage cavity of the laundry treatment box, and the liquid outlet 42b needs to be communicated with the cartridge assembly. If the pump head 40 is incorrectly assembled with the pump body 10, the following consequences can be caused: the liquid inlet 42a is communicated with the cartridge assembly, and the liquid outlet 42b is communicated with the liquid storage cavity, which can cause the piston pump 100 to lose the function of automatically dispensing the laundry treatment agent. Therefore, as shown in Figure 8 and Figure 9 The pump head 40 is provided with a first anti-fool notch 42c, and the pump body 10 is provided with a second anti-fool notch 10c. The first anti-fool notch 42c and the second anti-fool notch 10c correspond to each other. The first anti-fool notch 42c and the second anti-fool notch 10c can effectively prevent the incorrect assembly of the pump head 40 with the pump body 10, improve the accuracy and efficiency of the assembly, and avoid the malfunction or safety accident of the piston pump 100 caused by incorrect assembly.

[0141] As shown in Figure 8 , Figure 9 and Figure 10 In some embodiments, the pump head 40 includes a pump cover 41 and a valve plate 42. The side of the pump cover 41 facing the connecting plate 112 is further provided with a receiving groove 41e, which is communicated with the liquid inlet channel 41a and the liquid outlet channel 41b. At least part of the valve plate 42 is accommodated in the receiving groove 41e and located between the pump cover 41 and the connecting plate 112. The pump cover 41 can protect the internal valve plate 42 and prevent external impurities from entering the piston cavity 10a. The pump cover 41 can limit the valve plate 42 through the receiving groove 41e, so that the valve plate 42 is maintained in the correct position in the pump head 40 and provides necessary support for the valve plate 42. The valve plate 42 has the above-mentioned liquid inlet 42a and liquid outlet 42b. The pump cover 41 is further provided with a liquid inlet channel 41a communicated with the liquid inlet 42a and a liquid outlet channel 41b communicated with the liquid outlet 42b. Understandably, the liquid inlet channel 41a is communicated with the liquid storage cavity of the laundry treatment box, and the liquid outlet channel 41b is communicated with the cartridge assembly, forming a complete path for the laundry treatment agent to enter and exit the piston cavity 10a.

[0142] The valve plate 42 is provided with the above-mentioned first anti-fool notch 42c, which penetrates the valve plate 42 along the thickness direction of the valve plate 42. The pump cover 41 is provided with a third anti-fool notch 41c, which penetrates the pump cover 41 along the thickness direction of the pump cover 41, that is, the shape of the receiving groove 41e is consistent with the shape of the valve plate 42. Since the valve plate 42 is provided with the liquid inlet 42a and the liquid outlet 42b, and the pump cover 41 is provided with the liquid inlet channel 41a and the liquid outlet channel 41b, during assembly, the liquid inlet 42a needs to be aligned with the liquid inlet channel 41a, and the liquid outlet channel 41b needs to be aligned with the liquid outlet 42b. The third anti-fool notch 41c can make the valve plate 42 correctly aligned with the pump cover 41 during assembly, reduce the assembly time, and improve the accuracy of the assembly.

[0143] The design of the first fool-proof gap 42c and the third fool-proof gap 41c makes the assembly process more intuitive and simple, and the operator can quickly identify the correct assembly direction and position, reducing the assembly time and reducing the risk of component damage caused by forced assembly or incorrect assembly. Further, as on the automated assembly line, the design of the first fool-proof gap 42c, the second fool-proof gap 10c and the third fool-proof gap 41c helps the machine to identify and position, facilitating the automated assembly of the piston pump 100.

[0144] Exemplarily, when the valve plate 42 is a rectangular plate, the first fool-proof gap 42c is a certain corner of the rectangular plate, and only when the valve plate 42, the pump body 10 and the pump cover 41 are aligned in the correct way, the assembly can be completed, thereby ensuring the accuracy of the assembly. The corner provides a clear visual cue for the operator, making the assembly direction and position obvious at a glance, simplifying the assembly process.

[0145] Please continue to refer to Figure 8 , Figure 9 and Figure 10 For the pump body 10, it is understandable that the second fool-proof gap 10c is arranged on the pump cylinder shell 11 and located on the side close to the pump head 40. The pump cylinder shell 11 includes a shell body 111, a connecting plate 112 and a plurality of first connecting portions 113 arranged at intervals. The shell body 111 has the above-mentioned piston cavity 10a. The connecting plate 112 is connected to the first end of the shell body 111, i.e. the side close to the pump head 40. The connecting plate 112 has the above-mentioned second fool-proof gap 10c, and the plurality of first connecting portions 113 arranged at intervals are connected to the outer edge of the connecting plate 112. Among them, the first connecting portion 113 has a first connecting hole 113a. The pump cover 41 is provided with a second connecting portion 412, which is arranged opposite to the first connecting portion 113, which helps to improve the assembly accuracy between the pump cover 41 and the connecting plate 112. The second connecting portion 412 has a second connecting hole 412a. The piston pump 100 further comprises a connecting piece 60, which is inserted into the first connecting hole 113a and the second connecting hole 412a, so as to fixedly connect the pump cover 41 and the connecting plate 112, which helps to improve the connection stability between the pump cylinder shell 11 and the pump cover 41.

[0146] The plurality of first connecting portions 113 arranged at intervals on the outer edge of the connecting plate 112 can realize the connection stability of the pump cylinder shell 11 and the pump head 40 in the circumferential direction, increase the connection points between the pump cylinder shell 11 and the pump cover 41, thereby improving the connection strength and reducing the displacement of the pump head 40 during the operation of the piston pump 100.

[0147] Understandably, the first connecting part 113 can be provided with four, and the connecting plate 112 is a rectangular plate, four first connecting parts 113 are located on the middle of each edge of the rectangular plate respectively, so that the connection between the pump cover 41 and the connecting plate 112 is more balanced, which can more effectively resist deformation or damage caused by uneven stress; and evenly distribute the connection load, reduce local stress concentration, prolong the service life of the connecting piece 60.

[0148] Further, the first connecting hole 113a and the second connecting hole 412a can be threaded holes, and the connecting piece 60 is a bolt, which is inserted into the two threaded holes in turn. The threaded connection is convenient for installation and adjustment, and also allows the pump head 40 to be quickly disassembled when needed, facilitating maintenance and repair.

[0149] In order to make the connection of the second connecting part 412 and the second connecting part 412 more closely, the pump cover 41 includes a cover body 411, the cover body 411 has the above-mentioned accommodating groove 41e, a plurality of second connecting parts 412 are connected to the outer edge of the cover body 411, and the pump cover 41 further has a plurality of connecting grooves 41d, the connecting grooves 41d are arranged on the groove wall of the accommodating groove 41e, and the connecting grooves 41d are arranged closer to the connecting plate 112 than the second connecting part 412, the plurality of connecting grooves 41d are arranged one by one corresponding to the plurality of second connecting parts 412, the first connecting part 113 is inserted into the connecting groove 41d, the connecting groove 41d can position the first connecting part 113, and the first connecting part 113 can be inserted into the preset path along the depth direction of the connecting groove 41d, so that the first connecting part 113 and the second connecting part 412 are more easily aligned, so that the end face of the first connecting part 113 and the end face of the second connecting part 412 are fitted, the tightness of the connecting piece 60 connecting the pump cover 41 and the connecting plate 112 is improved, and the tightness of the end face also helps to prevent leakage of the laundry treatment agent, ensuring the sealing between the pump cover 41 and the connecting plate 112.

[0150] As shown in Figure 8 , it should be noted that the end face of the first connecting part 113 close to the first end is higher than the end face of the connecting plate 112 close to the first end, and the valve plate 42 has a limiting notch 42d, the limiting notch 42d can be limited with part of the outer wall of the first connecting part 113, that is, a plurality of first connecting parts 113 can be circumferentially abutted with the valve plate 42, so that the valve plate 42 can be accurately positioned during installation, reducing assembly error.

[0151] Please continue to refer to Figure 9In some embodiments, one of the pump cover 41 and the connecting plate 112 is provided with a buckling part 1121, and the other is provided with a buckling hole 41h, part of the buckling part 1121 is buckled into the buckling hole 41h, and in the assembly process, the pump cover 41 and the connecting plate 112 are pre-connected by buckling the buckling part 1121 in the buckling hole 41h, which can prepare the alignment work for locking the pump cover 41 and the connecting plate 112 with the connecting piece 60 later. After the pre-connection of the pump cover 41 and the connecting plate 112 is realized, the assembly personnel can independently complete the locking work of the connecting piece 60 without the help of others, which reduces the difficulty of assembling the pump cover 41 and the connecting plate 112.

[0152] As shown in Figure 9 and Figure 10 In one form of arrangement, one buckling part 1121 and one buckling hole 41h form a group, and in the present embodiment, multiple groups of buckling parts 1121 and buckling holes 41h can be provided, for example, two groups, and the two groups of buckling parts 1121 and buckling holes 41h are arranged diagonally, or four groups, and the four groups of buckling parts 1121 and buckling holes 41h are arranged at four corners, which is not limited in the present application.

[0153] Specifically, the connecting plate 112 is provided with the buckling part 1121, which extends from the inside to the outside at the outer edge of the connecting plate 112, and the buckling part 1121 has a first guide inclined surface 1121a, and the pump cover 41 is provided with the buckling hole 41h, which has a second guide inclined surface 41h1 arranged on the groove side wall of the accommodating groove 41e, and the buckling hole 41h penetrates the groove side wall of the accommodating groove 41e, and when the connecting plate 112 is buckled with the pump cover 41, the buckling part 1121 slides on the second guide inclined surface 41h1 through the first guide inclined surface 1121a to slide into the buckling hole 41h. The arrangement of the first guide inclined surface 1121a and the second guide inclined surface 41h1 can guide the movement path of the buckling part 1121, simplifying the assembly process.

[0154] To further enhance the sealing between the connecting plate 112 and the valve plate 42, the connecting plate 112 also has a first sealing groove 112b and the above-mentioned communication port 112a, the communication port 112a communicates with the piston cavity 10a, and the first sealing groove 112b is annularly arranged around the periphery of the communication port 112a, wherein the piston pump 100 further comprises a first sealing member 70, which is embedded in the first sealing groove 112b. Understandably, the first sealing member 70 is an annular sealing member, and the first sealing member 70 is used to seal the connecting plate 112 and the valve plate 42. The arrangement of the first sealing member 70 can effectively prevent the leakage of laundry treatment agent from the communication port 112a, and can also prevent external impurities from entering the communication port 112a, so as to achieve good sealing between the connecting plate 112 and the valve plate 42.

[0155] Please continue to refer to Figure 9 and Figure 10 , then the valve plate 42 is provided with a ring-shaped first blocking part 422 on one side of the connecting plate 112, the first blocking part 422 extrudes the first sealing element 70 in the direction of the first sealing groove 112b, so as to abut the first sealing element 70 against the groove bottom wall of the first sealing groove 112b, which helps to keep the accuracy of the sealing position of the first sealing element 70 during use of the piston pump 100, prevents the first sealing element 70 from being separated from the first sealing groove 112b due to external vibration and causing sealing failure, and the first sealing element 70 is uniformly extruded to fill the gap between the valve plate 42 and the connecting plate 112, thereby improving the sealing effect of the first sealing element 70.

[0156] Understandably, the shape and size of the first blocking part 422 are adapted to the shape and size of the first sealing element 70, that is, the first blocking part 422 is a ring-shaped blocking part, so that the first sealing element 70 is effectively extruded.

[0157] In some embodiments, the connecting plate 112 is provided with a plurality of lightening grooves 112c (such as Figure 7 The plurality of lightening grooves 112c are arranged at intervals along the outer circumferential side of the first sealing groove 112b. On the one hand, the lightening grooves 112c can appropriately reduce the weight of the connecting plate 112, reduce the use of materials, and realize the lightweight of the piston pump 100. On the other hand, the lightening grooves 112c help to reduce the internal stress of the material during injection molding, thereby reducing the cracks caused by stress concentration when the connecting plate 112 is demolded.

[0158] In some embodiments, the second end of the pump body 10 is provided with a liquid leakage hole 10b (such as Figure 8 The second end of the shell body 111 is provided with a liquid leakage hole 10b which is in communication with the piston cavity 10a. Since the piston pump 100 is vertically installed, and the liquid leakage hole 10b is arranged at the bottom end of the shell body 111, when the piston 20 is aged or damaged and can no longer seal the laundry treatment agent in the pump cavity, the laundry treatment agent will accumulate at the bottom end of the shell body 111 due to the action of gravity. At this time, since the bottom end is provided with the liquid leakage hole 10b which is in communication with the piston cavity 10a, the laundry treatment agent will flow out from the liquid leakage hole 10b, which can be directly observed by the user, so as to timely handle the liquid leakage problem, thereby reducing the time and difficulty of fault diagnosis.

[0159] As Figure 10As shown, to realize the double fool-proof effect of the installation of the valve plate 42 and the pump cover 41, at least one of the valve plate 42 and the pump cover 41 is provided with a fool-proof hole 41f, and at least the other one is provided with a fool-proof protrusion 423, which is inserted into the fool-proof hole 41f, so as to align and assemble the valve plate 42 and the pump cover 41 correctly, reduce the difficulty and error rate of assembly, and form a double fool-proof effect with the first fool-proof notch 42c and the third fool-proof notch 41c.

[0160] Understandably, in the actual assembly process, the liquid inlet one-way valve 91 and the liquid outlet one-way valve 92 are first installed on the valve plate 42, and then the valve plate 42 is assembled with the pump cover 41. If the fool-proof hole 41f and the fool-proof protrusion 423 are not provided, the liquid inlet 42a of the valve plate 42 and the liquid outlet channel 41b of the pump cover 41 will be oppositely arranged and communicated, which will directly affect the normal work of the piston pump 100. The provision of the fool-proof protrusion 423 and the fool-proof hole 41f can effectively prevent the above assembly error.

[0161] Specifically, the pump cover 41 is provided with the fool-proof hole 41f, which can be arranged on the bottom wall of the accommodating cavity and penetrate through the bottom wall of the accommodating cavity. The valve plate 42 is provided with the fool-proof protrusion 423, and the valve plate 42 comprises a plate body 421 and the fool-proof protrusion 423. The fool-proof protrusion 423 is arranged on the side of the plate body 421 facing the pump cover 41, and is inserted into the fool-proof hole 41f.

[0162] The fool-proof protrusion 423 can be provided with two, which are diagonally arranged. The diagonal arrangement can help the fool-proof protrusion 423 to uniformly distribute the force during assembly, reduce the damage of the fool-proof protrusion 423 caused by excessive force of a single point, and prevent the valve plate 42 from rotating during assembly, thereby playing a positioning role.

[0163] As shown in Figure 10 and Figure 11 In some embodiments, the pump cover 41 is provided with a clamping hole 41g, and the valve plate 42 further comprises a cantilever clamping hook 424, one end of which is connected to the plate body 421 at an angle, and the other end is connected to the clamping hole 41g in a buckling manner, so as to form a firm connection between the pump cover 41 and the valve plate 42, prevent loosening caused by vibration or pressure change, and realize quick assembly and disassembly of the pump cover 41 and the valve plate 42 by providing the cantilever clamping hook 424 and the clamping hole 41g.

[0164] As shown in Figure 11As shown, specifically, the cantilevered clamping hook 424 includes a plug-in portion 4241 and a hooking portion 4242. One end of the plug-in portion 4241 is connected to the plate body 421 and can form a 90° angle with the plate body 421, and extends towards the pump cover 41 and is arranged in the clamping hole 41g, which helps to improve the connection stability between the valve plate 42 and the pump cover 41 and reduce relative movement. The hooking portion 4242 is connected to the other end of the plug-in portion 4241 and hooks the outer wall surface of the pump cover 41, which can improve the connection strength between the pump cover 41 and the valve plate 42.

[0165] The cantilevered clamping hook 424 further includes a reinforcing portion connected to the plug-in portion 4241 and the plate body 421. The reinforcing portion helps to improve the stability of the cantilevered clamping hook 424 during use, reduces the breakage of the plug-in portion 4241 caused by external force, and improves the durability of the cantilevered clamping hook 424.

[0166] The cantilevered clamping hook 424 can be provided with two cantilevered clamping hooks 424 arranged diagonally, which increases the stability between the valve plate 42 and the pump cover 41 and reduces deformation or damage caused by excessive stress on a single cantilevered clamping hook 424 as a connection point. The diagonally arranged cantilevered clamping hooks 424 help to prevent the pump cover 41 from tilting when subjected to uneven force and maintain the flatness of the pump cover 41.

[0167] As an example, the plate body 421 can be a rectangular plate, and the two cantilevered clamping hooks 424 and the two anti-falling protrusions 423 are respectively located at the four corners of the plate body 421, which can position the four corners of the valve plate 42 and better fix the valve plate 42 to prevent it from shifting or rotating during assembly or use, thereby improving the stability of the assembly.

[0168] As shown in Figure 10 , Figure 12 and Figure 13 , in some embodiments, the pump cover 41 includes a cover body 411 having a receiving groove 41e and a second sealing groove 411a in communication with each other. The plate body 421 is received in the receiving groove 41e. The outlet of the liquid inlet channel 41a is arranged on the groove bottom wall of the receiving groove 41e and communicates with the liquid inlet 42a. The inlet of the liquid outlet channel 41b is arranged on the groove bottom wall of the receiving groove 41e and communicates with the liquid outlet 42b. The second sealing groove 411a is arranged around the periphery of the outlet of the liquid inlet channel 41a and the inlet of the liquid outlet channel 41b. The piston pump 100 further includes a second sealing member 80 embedded in the second sealing groove 411a. The second sealing member 80 is used to seal the connection between the cover body 411 and the plate body 421. The second sealing member 80 can effectively seal the communication between the outlet of the liquid inlet channel 41a and the liquid inlet 42a, and the communication between the liquid outlet channel 41b and the liquid outlet 42b, preventing the leakage of laundry treatment agent at the connection between the cover body 411 and the plate body 421, and ensuring the normal operation of the piston pump 100.

[0169] As Figure 10 and Figure 11 shown, then the valve plate 42 further comprises a second sealing part 425 connected to one side of the plate body 421 facing the accommodating groove 41e, the second sealing part 425 is used to press the second sealing member 80 towards the accommodating groove 41e, so that the second sealing member 80 is uniformly and tightly abutted to the groove bottom wall of the second sealing groove 411a, so that the second sealing member 80 is firmly limited between the valve plate 42 and the pump cover 41, and fills the gap between the valve plate 42 and the pump cover 41, improving the sealing effect of the second sealing member 80.

[0170] As Figure 10 shown, in particular, the second sealing member 80 comprises a first sealing part 81 and a second sealing part 82 interconnected in sequence, the first sealing part 81 is annularly arranged at the inlet of the liquid outlet channel 41b, and the second sealing part 82 is annularly arranged at the outlet of the liquid inlet channel 41a, that is, the first sealing member 70 is an "8" shaped sealing member, and the shapes of the second sealing groove 411a and the second sealing part 425 are consistent with the shape of the first sealing member 70, it should be noted that the first sealing part 81 and the second sealing part 82 are integrally formed, which improves the strength and durability of the second sealing member 80.

[0171] As Figure 12 and Figure 13 shown, since the second sealing groove 411a is arranged on the groove bottom wall of the accommodating groove 41e, the part of the cover body 411 where the second sealing groove 411a is arranged is relatively thin, in order to maintain the structural strength of the cover body 411, the side of the cover body 411 away from the second sealing groove 411a can be protrudingly provided with a reinforcing seat 416, the reinforcing seat 416 can compensate for the structural weakness of the cover body 411 and improve the overall strength of the cover body 411, during the working process of the piston pump 100, the cover body 411 will be affected by the internal pressure, and the arrangement of the reinforcing seat 416 helps to prevent the cover body 411 from deforming under the action of pressure, thereby improving the durability of the cover body 411.

[0172] As Figure 10 and Figure 11As shown, in some embodiments, the valve plate 42 further includes a first stopper 426 and a second stopper 427, and the plate body 421 has the above-mentioned spaced-apart liquid inlet 42a and liquid outlet 42b, the first stopper 426 is connected to one side of the plate body 421, is adjacent to the liquid inlet 42a, and forms a back-to-back arrangement with the liquid inlet one-way valve 91; and the second stopper 427 is connected to the other side of the plate body 421, is adjacent to the liquid outlet 42b, and is symmetrical with the first stopper 426 and the liquid outlet one-way valve 92. The first stop portion 426 and the second stop portion 427 are arranged in a back-to-back manner, wherein the first stop portion 426 is located within the projection of the liquid inlet one-way valve 91 on the plate body 421, and the second stop portion 427 is located within the projection of the liquid outlet one-way valve 92 on the plate body 421. The purpose of setting the first stop portion 426 and the second stop portion 427 is to prevent the liquid inlet one-way valve 91 and the liquid outlet one-way valve 92 from being installed incorrectly. The first stop portion 426 and the second stop portion 427 can be used as physical obstacles to enable the liquid inlet one-way valve 91 and the liquid outlet one-way valve 92 to be installed in the correct position.

[0173] like Figure 7 、 Figure 8 and Figure 12 As shown, in some embodiments, the pump head 40 has a first assembly hole 415a, and the pump body 10 has two second assembly holes 14a. Both the first assembly hole 415a and the second assembly hole 14a are used for assembly with the laundry treatment agent box. The projection of the first assembly hole 415a along the axial direction of the piston chamber 10a falls between the two second assembly holes 14a, and the line connecting the two second assembly holes 14a is arranged at an angle to the axial direction of the piston chamber 10a. The piston pump 100 is provided with multiple connection points for the laundry treatment agent box, which helps to disperse force and reduce local stress concentration. The provision of the first assembly hole 415a and the two second assembly holes 14a restricts the movement of the piston pump 100 in the horizontal and vertical directions, thereby improving the stability and reliability of the piston pump 100.

[0174] Specifically, since the piston pump 100 is mounted vertically, the two second assembly holes 14a can limit the left-right rocking of the piston pump 100, while the first assembly hole 415a located between the two second assembly holes 14a can also limit the vertical rocking of the piston pump 100. The first assembly hole 415a cooperates with the two second assembly holes 14a to form a stable triangular connection, which helps provide additional support during vertical installation, reduces rocking of the piston pump 100, and improves the stability of the connection between the piston pump 100 and the laundry treatment agent box.

[0175] Furthermore, the axial direction of the piston chamber 10a passes through the center of the first assembly hole 415a, which ensures the symmetry and balance of the position of the first assembly hole 415a and improves the stability of the piston pump 100.

[0176] The two second assembly holes 14a are arranged symmetrically along the vertical plane in the axial direction of the piston cavity 10a, that is, the connecting line of the two second assembly holes 14a is perpendicular to the axial direction of the piston cavity 10a. The perpendicular assembly can make the connection between the laundry treatment agent box and the pump cover 41 more stable, and reduce the structural weakness caused by improper assembly. The limiting of the first assembly hole 415a in the vertical direction in combination with the limiting of the second assembly hole 14a in the transverse direction realizes the fixation of the piston pump 100 in multiple dimensions, and further improves the stability of the connection of the piston pump 100.

[0177] It should be noted that the axial directions of the first assembly hole 415a and the second assembly hole 14a are parallel and perpendicular to the axial direction of the piston cavity 10a, which helps to ensure the coaxiality between the pump head 40 and the pump body 10, thereby improving the stability of the connection of the piston pump 100.

[0178] Please continue to refer to Figure 7 、 Figure 8 and Figure 12 In some embodiments, the pump body 10 further comprises two assembly seats 14 connected to the two sides of the pump cylinder shell 11, which can be symmetrically arranged along the vertical plane in the axial direction of the piston cavity 10a. The symmetrically arranged assembly seats 14 can ensure that the piston pump 100 is more uniformly stressed when assembled with the laundry treatment agent box, reducing deformation or damage caused by unilateral stress. In addition, the two second assembly holes 14a are limited in the transverse direction of the piston pump 100, preventing the piston pump 100 from rotating after assembly and keeping it connected to the correct position.

[0179] Along the axial direction of the piston cavity 10a, the assembly seat 14 is located between the pump head 40 and the motor seat 12. Each assembly seat 14 has at least one second assembly hole 14a as described above. Understandably, the second assembly hole 14a is closer to the motor 32 than the first assembly hole 415a. During operation, the motor 32 will vibrate. By arranging the second assembly hole 14a near the motor 32, the vibration generated during operation of the motor 32 can be better absorbed and dispersed, the stress caused by vibration can be resisted, and the disconnection of the piston pump 100 and the laundry treatment agent box caused by vibration can be reduced.

[0180] Exemplarily, the first assembly hole 415a and the second assembly hole 14a can both be threaded holes, and the laundry treatment agent box has corresponding threaded holes at the relative positions, that is, the piston pump 100 is threadedly connected with the laundry treatment agent box, providing a reliable fixing method to make the firm connection between the laundry treatment agent box and the pump cover 41 or the assembly seat 14 not easy to loosen.

[0181] Further, to reduce the assembly difficulty of the assembly seat 14 and the laundry treatment agent box, the assembly seat 14 further has a positioning hole 14b arranged at intervals with the second assembly hole 14a, and the positioning hole 14b is used to realize the pre-positioning with the laundry treatment agent box. Understandably, the laundry treatment agent box is provided with a positioning part matched with the positioning hole 14b, and the positioning part can be arranged in the positioning hole 14b to realize the pre-positioning of the piston pump 100 and the laundry treatment agent box. Then, the assembly personnel locks the laundry treatment agent box through the second assembly hole 14a.

[0182] In some embodiments, the first assembly hole 415a is arranged on the pump cover 41 and located between the liquid inlet channel 41a and the liquid outlet channel 41b, which helps to match the symmetry of the pump cover 41, reduces the possibility of eccentricity or misalignment caused by the arrangement of the first assembly hole 415a, and thus enhances the structural stability of the pump cover 41.

[0183] Please refer to Figure 12 and Figure 13 In some embodiments, the pump cover 41 further comprises a liquid inlet pump nozzle 413 and a liquid outlet pump nozzle 414, and a bridge plate 415. The liquid inlet pump nozzle 413 and the liquid outlet pump nozzle 414 are connected to the cover body 411 or the reinforcing seat 416 on the side away from the accommodating groove 41e. The liquid inlet pump nozzle 413 has the liquid inlet channel 41a, and the liquid outlet pump nozzle 414 has the liquid outlet channel 41b. The two ends of the bridge plate 415 are connected to the liquid inlet pump nozzle 413 and the liquid outlet pump nozzle 414 and located between the liquid inlet pump nozzle 413 and the liquid outlet pump nozzle 414. The arrangement of the bridge plate 415 helps to disperse the force received by the pump cover 41, reduces the local stress concentration, reduces the influence of vibration on the liquid inlet pump nozzle 413 and the liquid outlet pump nozzle 414, and thus enhances the structural stability and strength of the pump cover 41.

[0184] The bridge plate 415 is further connected to the cover body 411 or the reinforcing seat 416 on the side away from the accommodating groove 41e and extends towards the side away from the accommodating groove 41e. The bridge plate 415 has the first assembly hole 415a, which optimizes the structural layout of the pump cover 41, makes the layout of the liquid inlet channel 41a, the liquid outlet channel 41b and the first assembly hole 415a more compact and reasonable, and improves the design efficiency.

[0185] Specifically, the bridge plate 415 comprises a first plate body and a second plate body. The first plate body is connected to the cover body 411 and extends in the direction away from the accommodating groove 41e. The second plate body is arranged in layers on the first plate body and located on the side close to the cover body 411. The first assembly hole 415a penetrates the first plate body and the second plate body, and the first assembly hole 415a is thickened at the position, so as to compensate for the problem of reduced structural strength caused by the arrangement of the first assembly hole 415a, and enhance the stability and durability of the bridge plate 415.

[0186] The cover body 411, the liquid inlet pump nozzle 413, the liquid outlet pump nozzle 414 and the bridge plate 415 are integrally formed, thereby improving the structural strength and stability of the pump cover 41, and reducing the time for assembling the pump cover 41 and the maintenance cost.

[0187] As shown in Figure 14 and Figure 15 In some embodiments, the piston cavity 10a has a communication port 112a penetrating one end of the pump body 10, and the piston 20 is provided with a fitting part 221 on the side facing the communication port 112a, which is used to cooperate with external fitting tools to enable the piston 20 to be installed in the piston cavity 10a. The design of the fitting part 221 makes the installation of the piston 20 more convenient. Through cooperation with external fitting tools, the piston 20 can be quickly and accurately installed in place, thereby improving the assembly efficiency. The design of the fitting part 221 can adapt to the needs of an automatic assembly line, so that the installation of the piston 20 can be automated, thereby improving the production efficiency and consistency.

[0188] In one arrangement, the fitting part 221 is a fitting protrusion, which can be easily grabbed and positioned by an automatic assembly machine, and is suitable for an automatic or semi-automatic assembly line, thereby improving the production efficiency. The fitting protrusion can be integrally formed with the plug body 22, thereby reducing the weak point of the material and improving the strength of the overall structure of the plug body 22.

[0189] In another arrangement, the fitting part 221 is a fitting groove, specifically one of an internal hexagonal groove, a slot or a cross groove. The internal hexagonal groove, the slot and the cross groove are all common screw head groove types, each of which is suitable for different assembly tools and environments, thereby providing diversified choices to adapt to different assembly needs. Understandably, in actual use, the fitting part 221 is a slot. The design of the slot provides a clear directional orientation, which is crucial for the installation of the piston 20 in the piston cavity 10a, so that the direction of the piston 20 during installation is correct.

[0190] Please continue to refer to Figure 14 and Figure 15 In some embodiments, the piston 20 includes a guide body 21, a plug body 22 and a reinforcing rib 23. The guide body 21 is in sliding cooperation with the inner wall of the piston cavity 10a. The plug body 22 is connected to the end of the guide body 21, specifically the end of the guide body 21 facing the pump head 40. The guide body 21 can guide and support the plug body 22 at the end. The cross-sectional area of the plug body 22 is greater than that of the guide body 21, so as to form a pump cavity between the plug body 22 and the pump head 40, thereby reducing the risk of leakage of the laundry treatment agent into the part of the piston cavity 10a where the guide body 21 is located.

[0191] The reinforcing rib 23 is connected to the guide body 21 and the plug body 22, which can enhance the structural strength of the piston 20, prevent the piston 20 from deforming under frequent movement, improve the durability of the piston 20, and prolong the service life of the piston 20.

[0192] To reduce the risk of leakage of the laundry treatment agent, the outer peripheral wall of the plug body 22 is provided with a third sealing groove 22a, and the piston pump 100 further comprises a third sealing member 90 embedded in the third sealing groove 22a, which is used to seal the plug body 22 and the inner wall of the piston cavity 10a. The provision of the third sealing member 90 can provide a more reliable sealing effect and reduce the leakage of the laundry treatment agent into the part of the piston cavity 10a where the guide body 21 is located.

[0193] The third sealing groove 22a can be provided with a plurality of third sealing grooves 22a arranged at intervals along the axial direction of the piston cavity 10a, and the plurality of third sealing members 90 are embedded in the plurality of third sealing grooves 22a, which can form a multiple sealing barrier. Such a design greatly enhances the sealing effect and effectively prevents the leakage of the laundry treatment agent to the second end of the pump body 10 during high pressure or long-term use. The provision of multiple third sealing members 90 can provide a more reliable sealing effect.

[0194] Please continue to refer to Figure 14 and Figure 15 In some embodiments, the guide body 21 is provided with a first guide portion 211 located on the central axis of the guide body 21, and the inner wall of the piston cavity 10a is provided with an axially extending first guide rail 1111, which provides stable guidance and enhances the reliability of the sliding of the piston 20. The first guide portion 211 is slidably arranged in the first guide rail 1111, which ensures the linear movement of the piston 20 in the axial direction in the piston cavity 10a, and improves the accuracy and stability of the movement.

[0195] Understandably, the first guide rail 1111 includes a first guide rail portion and a second guide rail portion, which are arranged in parallel, and the first guide portion 211 slides between the first guide rail and the second guide rail. The first guide rail portion and the second guide rail portion provide a stable sliding path.

[0196] When the assembly portion 221 is configured as a slot, the design of the slot allows the assembly tool (such as a screwdriver) to conveniently cooperate with the assembly portion 221, achieving quick assembly of the piston 20. The length direction of the slot is perpendicular to the extension direction of the first guide portion 211, and the central axis of the first guide rail is located in the vertical plane in which the axial direction of the piston cavity 10a is located. This perpendicular relationship helps to ensure that when the slot is assembled, the first guide portion 211 can also be aligned with the first guide rail 1111 and assembled in place, thereby improving the efficiency and accuracy of the assembly.

[0197] Further, the inner wall of the piston cavity 10a is further provided with a second guide rail 1112 and a third guide rail 1113 arranged oppositely, both of which extend along the axial direction of the piston cavity 10a, and the guide body 21 is further provided with a second guide part 212 and a third guide part 213, both of which are located on the two sides of the guide body 21 in the width direction, and are respectively connected to the second guide rail 1112 and the third guide rail 1113 in a sliding manner, so as to ensure the linear movement of the piston 20 in the piston cavity 10a along the axial direction to be more accurate and stable, and the second guide part 212 and the third guide part 213 can limit the deflection of the piston 20 in the circumferential direction in the piston cavity 10a, thereby enhancing the ability of the piston 20 to resist lateral force and maintaining the linearity and stability of movement.

[0198] In order to make the sliding of the piston 20 in the piston cavity 10a more smooth, a lubricating medium can be applied on the inner wall of the piston cavity 10a to reduce direct contact and reduce the wear of the piston 20, and the guide body 21 is further provided with two oil storage grooves 21a arranged adjacent to the second guide part 212 and the third guide part 213 along the axial direction of the piston cavity 10a, which are used to collect the lubricating medium in the piston cavity 10a. When the lubricating medium in the piston cavity 10a is too much, it may cause blockage, so it is necessary to reduce the resistance caused by the accumulation of the lubricating medium, and the oil storage groove 21a can effectively collect the excess lubricating medium during the movement of the second guide part 212 and the third guide part 213, and can be effectively distributed again with the movement of the piston 20 when it overflows.

[0199] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the positional relationship described in the drawings is only used for exemplary illustration, and cannot be understood as a limitation of the present patent, and for those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0200] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as implying or implying relative importance or implicitly indicating the number of indicated technical features. Therefore, the features defined as "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise explicitly specified.

[0201] In the description of the application, unless otherwise clearly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0202] It should be noted that when an element is referred to as "fixed to" or "disposed on" another element, it can be directly on the other element or there can be an intervening element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be an intervening element. The terms "vertical", "horizontal", "upper", "lower", "left", "right", and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation.

[0203] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any skilled in the art person within the technical scope disclosed by the present application can easily think of changes or replacements, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A piston pump characterized in that, The pump comprises: a pump body having an integrated structure and a piston cavity; a piston reciprocally arranged in the piston cavity along an axial direction of the piston cavity; a driving assembly connected to the pump body and partially inserted into the piston cavity to drive the piston to reciprocate; a pump head connected to the pump body and having a liquid outlet and a liquid inlet both in communication with the piston cavity. The pump body has a first end close to the pump head and a second end away from the pump head along a sliding direction of the piston.

2. The piston pump of claim 1, wherein The piston cavity has a communication port penetrating the first end of the pump body, the piston is assembled in the piston cavity through the communication port, the liquid outlet and the liquid inlet are also in communication with the piston cavity through the communication port, and the driving assembly is arranged closer to the second end than to the first end. The second end is provided with a liquid leakage hole in communication with the piston cavity.

3. The piston pump of claim 2, wherein The driving assembly comprises:

4. The piston pump of claim 1, wherein, a motor housing having a motor cavity; and a motor assembled in the motor cavity and used to drive the piston to reciprocate. One of an inner wall surface of the motor housing and an outer wall surface of the motor has a buckle, the other of the inner wall surface of the motor housing and the outer wall surface of the motor is buckled with the buckle, so that the motor is limited in the motor cavity. The buckle is provided with a plurality of buckles arranged in a circumferential direction of the inner wall surface of the motor housing.

5. The piston pump of claim 4, wherein, The inner wall surface of the motor housing has the buckle, the buckle has a first guide surface slidingly matched with the motor, and the first guide surface gradually inclines to a central axis of the motor in a direction in which the motor is inserted into the motor cavity.

6. The piston pump of claim 4, wherein, The buckle also has a second guide surface slidingly matched with the motor, and the second guide surface gradually inclines to the central axis of the motor in a direction in which the motor is removed from the motor cavity.

7. The piston pump of claim 4, wherein The motor housing is provided with a wire hole in communication with the motor cavity, and the wire hole is used to lead out a power cable of the motor from the motor cavity.

8. The piston pump of claim 4, wherein, The pump body comprises:

9. The piston pump of claim 4, wherein, a pump column shell having the piston cavity; and a motor seat connected to the pump column shell and having a mounting cavity, a cavity bottom wall of the mounting cavity having a through hole in communication with the piston cavity; Part of the driving assembly is arranged in the mounting cavity and the through hole to be connected with the piston. The motor seat comprises:

10. The piston pump of claim 9, wherein, a seat body connected to the pump column shell; and a mounting plate connected to the seat body, provided with a first fixing hole, and configured with the mounting cavity together with the seat body; The motor housing has a second fixing hole, and the piston pump further comprises a fixing member arranged in the first fixing hole and the second fixing hole. An avoiding groove is arranged on an outer wall surface of the motor housing and extends along an axial direction of the motor, the second fixing hole is located on an extension path of the avoiding groove, and the avoiding groove is used to avoid the fixing member inserted into the second fixing hole.

11. The piston pump of claim 10, wherein, ​ 12. The piston pump of claim 10, wherein, The mounting plate and the motor are provided with a limiting protrusion and a limiting hole respectively.

13. The piston pump of claim 12, wherein, The motor shell further has a groove provided on the cavity wall of the motor cavity and communicated with the motor cavity; The motor is provided with a connecting lug which is clamped in the groove; The connecting lug has the limiting hole, and the mounting plate is provided with the limiting protrusion.

14. The piston pump of claim 13, wherein, There is a gap between at least part of the limiting protrusion and the hole wall of the limiting hole.

15. The piston pump of claim 13, wherein, The motor shell is provided with a supporting lug which is oppositely arranged with the connecting lug, the supporting lug has the second fixing hole, the connecting lug has a third fixing hole which is spaced apart from the limiting hole, and the fixing member is sequentially clamped in the second fixing hole, the third fixing hole and the first fixing hole.

16. The piston pump of claim 10, wherein, The inner peripheral wall of the motor cavity has a fool-proof groove, and the mounting plate is provided with a fool-proof part which is adapted to the fool-proof groove and is embedded in the fool-proof groove.

17. The piston pump of claim 10, wherein, The pump body further comprises: A supporting rib plate connected to the outer peripheral wall of the seat body and the outer surface of the mounting plate which is away from the motor.

18. The piston pump of claim 10, wherein, The driving assembly further comprises: A shaft sleeve which is sleeved on the motor shaft of the motor, rotatably arranged in the mounting cavity, and eccentrically provided with a driving part on the side away from the motor, the driving part is clamped in the through hole and connected with the piston; The outer peripheral wall of the shaft sleeve is annularly provided with a convex ring, the diameter of the convex ring is greater than the diameter of the through hole, so that the convex ring abuts against the cavity bottom wall of the mounting cavity.

19. The piston pump of claim 1, wherein, The pump head is provided with a first fool-proof notch, and the pump body is provided with a second fool-proof notch, the first fool-proof notch corresponds to the second fool-proof notch.

20. The piston pump of claim 19, wherein, The pump head comprises: A pump cover which is provided with a liquid inlet channel communicated with the liquid inlet and a liquid outlet channel communicated with the liquid outlet; and A valve plate which is located between the pump cover and the pump body and has the liquid inlet and the liquid outlet; The valve plate is provided with the first fool-proof notch which penetrates the valve plate along the thickness direction of the valve plate, the pump cover is provided with a third fool-proof notch which penetrates the pump cover along the thickness direction of the pump cover, and the third fool-proof notch corresponds to the first fool-proof notch.

21. The piston pump of claim 20, wherein, The valve plate is a rectangular plate, and the first fool-proof notch is arranged at a corner of the valve plate.

22. The piston pump of claim 20, wherein, The pump body comprises: A pump column shell which has the piston cavity and the second fool-proof notch; and A motor seat which is connected to the pump column shell, the motor seat has a mounting cavity, and the cavity bottom wall of the mounting cavity has a through hole communicated with the piston cavity; Part of the driving assembly is clamped in the mounting cavity and the through hole to be connected with the piston.

23. The piston pump of claim 22, wherein, The pump column shell comprises: A shell body which has the piston cavity; A connecting plate which is connected to the first end of the shell body and has the second fool-proof notch; and A plurality of spaced-apart first connecting parts which are connected to the outer edge of the connecting plate, the connecting part has a first connecting hole; The pump cover is provided with a second connecting portion which is arranged opposite to the first connecting portion, and the second connecting portion has a second connecting hole. The piston pump further comprises a connecting piece which is inserted into the first connecting hole and the second connecting hole, so that the pump cover and the connecting plate are fixedly connected.

24. The piston pump of claim 23, wherein, The pump cover has a plurality of connecting grooves which are arranged one by one corresponding to the plurality of second connecting portions, and the first connecting portion is arranged in the connecting groove, so that the end surface of the first connecting portion is in close contact with the end surface of the second connecting portion.

25. The piston pump of claim 23, wherein, The outer edge of the valve plate has a plurality of limiting notches which are limitedly matched with the partial outer peripheral wall of the first connecting portion.

26. The piston pump of claim 23, wherein, The side of the pump cover facing the connecting plate is provided with a containing groove, and the valve plate is at least partially located in the containing groove. One of the pump cover and the connecting plate is provided with a buckling portion, and the other of the pump cover and the connecting plate is provided with a buckling hole, and part of the buckling portion is buckled into the buckling hole.

27. The piston pump of claim 26, wherein, The connecting plate is provided with the buckling portion, and the buckling portion has a first guide inclined surface. The pump cover is provided with the buckling hole, and the buckling hole has a second guide inclined surface, and in the process of buckling part of the buckling portion into the buckling hole, the buckling portion slides and abuts on the first guide inclined surface and the second guide inclined surface.

28. The piston pump of claim 23, wherein, The connecting plate has a first sealing groove and a communication port, the communication port is communicated with the piston cavity, and the first sealing groove is annularly arranged on the periphery of the communication port; wherein the piston pump further comprises: A first sealing member is embedded in the first sealing groove, and the first sealing member is used for sealingly connecting the connecting plate and the valve plate.

29. The piston pump of claim 28, wherein, The side of the valve plate facing the connecting plate is provided with an annular first plugging portion, and the first plugging portion extrudes the first sealing member in the direction of the first sealing groove, so that the first sealing member is tightly abutted on the groove bottom wall of the first sealing groove.

30. The piston pump of claim 28, wherein, The connecting plate is provided with a plurality of lightening grooves, and the plurality of lightening grooves are arranged at intervals along the outer peripheral side of the first sealing groove.

31. The piston pump of claim 1, wherein, The pump head comprises: a pump cover connected with the pump body; and a valve plate located between the pump cover and the pump body and having the liquid outlet and the liquid inlet both communicated with the piston cavity; wherein at least one of the valve plate and the pump cover is provided with a foolproof hole, and at least one of the other of the valve plate and the pump cover is provided with a foolproof protrusion which is inserted into the foolproof hole.

32. The piston pump of claim 31, wherein, The pump cover is provided with a clamping hole, and the valve plate comprises: a plate body having the liquid inlet and the liquid outlet arranged at intervals; and a cantilever clamping hook having one end connected with the plate body at an angle and the other end buckled and connected with the clamping hole.

33. The piston pump of claim 32, wherein, The cantilever clamping hook comprises: a plug-in portion having one end connected with the plate body and extending towards the pump cover and arranged in the clamping hole; and a hooking portion connected with the other end of the plug-in portion and hooked with the outer wall surface of the pump cover.

34. The piston pump according to claim 32, wherein the cantilever clamping hook is provided with two, and the two cantilever clamping hooks are diagonally arranged. The two foolproof protrusions are arranged diagonally. The two cantilever clamps and the two foolproof protrusions are respectively located at four corners of the plate body.

35. The piston pump of claim 32, wherein, The pump cover is provided with a liquid inlet channel communicated with the liquid inlet and a liquid outlet channel communicated with the liquid outlet; the pump cover comprises: The cover body has a containing groove and a second sealing groove which are communicated with each other, the plate body is accommodated in the containing groove, the outlet of the liquid inlet channel is arranged on the groove bottom wall of the containing groove and communicated with the liquid inlet, the inlet of the liquid outlet channel is arranged on the groove bottom wall of the containing groove and communicated with the liquid outlet, and the second sealing groove is arranged around the outlet of the liquid inlet channel and the inlet of the liquid outlet channel; The piston pump further comprises: The second sealing member is embedded in the second sealing groove, and is used for sealingly connecting the cover body and the plate body to seal the communication between the outlet of the liquid inlet channel and the liquid inlet and the communication between the inlet of the liquid outlet channel and the liquid outlet.

36. The piston pump of claim 35, wherein, The valve plate further comprises: The second sealing member is embedded in the second sealing groove, and is used for sealingly connecting the cover body and the plate body to seal the communication between the outlet of the liquid inlet channel and the liquid inlet and the communication between the inlet of the liquid outlet channel and the liquid outlet.

37. The piston pump of claim 35, wherein, The second sealing member comprises a first sealing part and a second sealing part which are interconnected as a whole, the first sealing part is arranged around the inlet of the liquid outlet channel, and the second sealing part is arranged around the outlet of the liquid inlet channel.

38. The piston pump of claim 32, wherein, The piston pump further comprises: The liquid inlet one-way valve is connected to the plate body and is used for opening and closing the liquid inlet; and The liquid outlet one-way valve is connected to the plate body away from the liquid inlet one-way valve and is used for opening and closing the liquid outlet.

39. The piston pump of claim 38, wherein, The valve plate further comprises: The first stopper is connected to one side of the plate body and is arranged adjacent to the liquid inlet; and The second stopper is connected to the other side of the plate body, is arranged away from the first stopper, and is arranged adjacent to the liquid outlet; The first stopper is located in the projection of the liquid inlet one-way valve on the plate body, and the second stopper is located in the projection of the liquid outlet one-way valve on the plate body.

40. The piston pump of claim 1, wherein, The pump head has a first assembly hole, the pump body has two second assembly holes, the first assembly hole and the second assembly hole are used for assembling with the clothes treatment agent box, the projection of the first assembly hole along the axial direction of the piston cavity falls between the two second assembly holes, and the line between the two second assembly holes is arranged at an angle with the axial direction of the piston cavity.

41. The piston pump of claim 40, wherein, The axial direction of the piston cavity passes through the center of the first assembly hole.

42. The piston pump of claim 40, wherein, The two second assembly holes are symmetrically arranged along the vertical plane in which the axial direction of the piston cavity is located.

43. The piston pump of claim 40, wherein, The pump body comprises: The pump cylinder shell has the piston cavity; The motor seat is connected to the pump cylinder shell, the motor seat has a mounting cavity, the cavity bottom wall of the mounting cavity has a through hole communicated with the piston cavity, and part of the driving assembly is arranged in the mounting cavity and the through hole to be connected with the piston; and The motor seat is connected to the pump cylinder shell, the motor seat has a mounting cavity, the cavity bottom wall of the mounting cavity has a through hole communicated with the piston cavity, and part of the driving assembly is arranged in the mounting cavity and the through hole to be connected with the piston; and Two assembly seats are connected to two sides of the pump cylinder along the axial direction of the piston cavity and between the pump head and the motor seat, and each assembly seat has at least one second assembly hole.

44. The piston pump of claim 43, wherein, The assembly seat also has a positioning hole arranged at intervals with the second assembly hole, and the positioning hole is used for realizing pre-positioning with the clothes treatment agent box.

45. The piston pump of claim 40, wherein, The pump head comprises: A pump cover is provided with a liquid inlet channel communicated with the liquid inlet and a liquid outlet channel communicated with the liquid outlet; and A valve plate is located between the pump cover and the pump body and has the liquid inlet and the liquid outlet; The first assembly hole is arranged on the pump cover and between the liquid inlet channel and the liquid outlet channel.

46. The piston pump of claim 45, wherein, The pump cover comprises: A cover body has a receiving groove for accommodating the valve plate; A liquid inlet pump nozzle and a liquid outlet pump nozzle are connected to one side of the cover body away from the receiving groove, the liquid inlet pump nozzle has the liquid inlet channel, and the liquid outlet pump nozzle has the liquid outlet channel; and A bridge plate is connected to the liquid inlet pump nozzle and the liquid outlet pump nozzle and located between the liquid inlet pump nozzle and the liquid outlet pump nozzle, and the bridge plate has the first assembly hole.

47. The piston pump of claim 46, wherein, The bridge plate comprises: A first plate body is connected to the cover body and extends in a direction away from the receiving groove; and A second plate body is stacked on the first plate body; The first assembly hole penetrates the first plate body and the second plate body.

48. The piston pump of claim 46, wherein, The cover body, the liquid inlet pump nozzle and the liquid outlet pump nozzle and the bridge plate are integrally formed.

49. The piston pump of claim 1, wherein, The piston cavity has a communication port penetrating one end of the pump body, and one side of the piston facing the communication port is provided with an assembly part for cooperating with an external assembly tool to enable the piston to be installed in the piston cavity.

50. The piston pump of claim 49, wherein, The assembly part is one of an internal hexagonal groove, a slot or a cross groove.

51. The piston pump of claim 49, wherein, The piston comprises: A guide body is in sliding cooperation with the inner wall of the piston cavity; A plug body is connected to the end of the guide body, has the assembly part, and the cross-sectional area of the plug body is greater than that of the guide body; and A reinforcing rib is connected to the guide body and the plug body.

52. The piston pump of claim 51, wherein, A third sealing groove is arranged around the outer peripheral wall of the plug body, and the piston pump further comprises: A third sealing member is embedded in the third sealing groove, and the third sealing member is used for sealing the plug body and the inner wall of the piston cavity.

53. The piston pump of claim 51, wherein, The guide body is provided with a first guide part, and the inner wall of the piston cavity is provided with an axially extending first guide rail, and the first guide part is slidably arranged in the first guide rail.

54. The piston pump of claim 53, wherein, The assembly part is a slot, the length direction of the slot is perpendicular to the extension direction of the first guide part, and the central axis of the first guide part is located in a vertical plane in the axial direction of the piston cavity.

55. The piston pump of claim 51, wherein, The inner wall of the piston cavity is also provided with oppositely arranged second guide rails and third guide rails, and the second guide rails and the third guide rails are arranged along the axial direction of the piston cavity; The guide body is further provided with a second guide part and a third guide part, which are respectively located at two sides of the guide body and are respectively slidably connected to the second guide rail and the third guide rail.

56. The piston pump of claim 55, wherein, The guide body is provided with two oil storage grooves, which are respectively arranged adjacent to the second guide part and the third guide part along the axial direction of the piston cavity and are used for collecting lubricating medium in the piston cavity.

57. A laundry treatment device comprising: Comprising: a main body comprising a housing and a cartridge assembly arranged in the housing; a laundry treatment agent cartridge having a liquid storage cavity arranged on the housing; and a piston pump according to any one of claims 1-56, which is connected to the laundry treatment agent cartridge, the liquid inlet communicates with the liquid storage cavity, and the liquid outlet communicates with the cartridge assembly. ​

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