Piston pump and laundry treatment apparatus

Abstract

The utility model provides a piston pump and a clothes processing device, the piston pump comprises a pump assembly, a piston and a driving assembly, the pump assembly is provided with a piston cavity, a liquid outlet and a liquid inlet, and the liquid outlet and the liquid inlet communicate with the 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 assembly and comprises a motor shell and a motor, the motor shell is provided with a motor cavity, and the motor is assembled in the motor cavity and used for driving the piston to reciprocate; one of the inner wall surface of the motor shell and the outer wall surface of the motor is provided with a buckle, and the buckle is buckled with the other one of the inner wall surface of the motor shell and the outer wall surface of the motor, so that the motor is limited in the motor cavity. According to the technical scheme of the embodiment, the assembly process of the motor and the motor shell becomes simpler and faster, the motor can be prevented from being separated from the motor shell, and the running safety of the motor is improved.

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 Art

[0002] With the advancement of technology and the improvement of people's living standards, smart washing machines have gradually become a must-have appliance in modern households. Smart washing machines often have an automatic detergent dispensing function. This function uses multi-dimensional sensing to determine the exact weight of the clothes and water consumption, and then precisely controls the automatic detergent dispensing through a piston pump.

[0003] In existing piston pump technology, the motor is usually assembled in the motor housing to drive the reciprocating motion of the piston. However, because the motor is not restrained in the motor cavity, the locking work of the motor housing and other pump structures is affected. Utility Model Content

[0004] Embodiments of the present application provide a piston pump and a clothes processing device, aiming to improve the assembly efficiency of the piston pump.

[0005] In a first aspect, an embodiment of the present application provides a piston pump, comprising:

[0006] A pump assembly having a piston chamber and a liquid outlet and a liquid inlet both communicating with the piston chamber;

[0007] a piston, disposed in the piston cavity so as to be slidable reciprocatingly along the axial direction of the piston cavity; and

[0008] A drive assembly connected to the pump assembly, comprising a motor housing and a motor, wherein the motor housing has a motor cavity, the motor is assembled in the motor cavity, and the motor is used to drive the piston to reciprocate;

[0009] Wherein, one of the inner wall surface of the motor housing and the outer wall surface of the motor has a snap, and the snap is engaged with the other of the inner wall surface of the motor housing and the outer wall surface of the motor to limit the motor to be located in the motor cavity.

[0010] In some embodiments, a plurality of the clips are provided, and the clips are arranged at intervals along the circumferential direction of the inner wall surface of the motor housing.

[0011] In some embodiments, the inner wall surface of the motor housing has the clip, and the clip has a first guide surface that slides with the motor, and the first guide surface gradually tilts toward the central axis of the motor along the direction in which the motor is inserted into the motor cavity.

[0012] In some embodiments, the buckle further has a second guide surface that is slidably engaged with the motor, and the second guide surface gradually tilts toward the central axis of the motor along the direction in which the motor moves out of the motor cavity.

[0013] In some embodiments, the motor housing is provided with a wire hole, the wire hole is connected to the motor cavity, and the wire hole is used to lead out the power cable of the motor from the motor cavity.

[0014] In some of these embodiments, the pump assembly comprises:

[0015] a pump body having the piston chamber; and

[0016] a pump head, connected to the pump body and having the liquid inlet and the liquid outlet;

[0017] The pump body has a first fixing hole, the motor housing has a second fixing hole, and the piston pump further includes a fixing member, which is inserted into the first fixing hole and the second fixing hole.

[0018] In some embodiments, the outer wall surface of the motor housing is provided with an avoidance groove, the avoidance groove is extended along the axial direction of the motor, the second fixing hole is located on the extension path of the avoidance groove, and the avoidance groove is used to avoid the fixing part inserted in the second fixing hole.

[0019] In some embodiments, one of the pump body and the motor is provided with a limiting protrusion, and the other of the pump body 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, which is provided on the cavity wall of the motor cavity and communicates with the motor cavity;

[0021] The motor is provided with a connecting ear, and the connecting ear is clamped in the groove;

[0022] Wherein, the connecting ear has the limiting hole, and the pump assembly is provided with the limiting protrusion.

[0023] In some embodiments, there is a gap between at least a portion of the limiting protrusion and the hole wall of the limiting hole.

[0024] In some embodiments, the motor housing is provided with a support ear, the support ear is arranged opposite to the connecting ear, the support ear has the second fixing hole, the connecting ear has a third fixing hole, the third fixing hole and the limiting hole are arranged at intervals, and the fixing member is sequentially passed through the second fixing hole, the third fixing hole and the first fixing hole.

[0025] In some embodiments, the inner peripheral wall of the motor cavity has an anti-idiot groove; the pump body is provided with an anti-idiot portion adapted to the anti-idiot groove, and the anti-idiot portion is embedded in the anti-idiot groove.

[0026] In some embodiments, the pump body has a mounting cavity and a through hole both communicating with the piston cavity, the through hole being provided on a bottom wall of the mounting cavity, and the drive assembly further comprising:

[0027] a shaft sleeve, sleeved on the motor shaft of the motor, rotatably disposed in the mounting cavity, a driving portion eccentrically disposed on a side of the shaft sleeve away from the motor, the driving portion passing through the through hole and connected to the piston;

[0028] Wherein, a convex ring is provided on the outer peripheral wall of the sleeve, and the diameter of the convex ring is larger than the diameter of the through hole, so that the lower end surface of the convex ring abuts against the bottom wall of the installation cavity.

[0029] In a second aspect, the present application provides a clothes processing device, comprising:

[0030] A main body, comprising a shell and a barrel assembly disposed in the shell;

[0031] a laundry treatment agent box having a liquid storage cavity and disposed on the housing; and

[0032] The piston pump as described in any one of the above items is connected to the laundry treatment agent box, the liquid inlet is communicated with the liquid storage chamber, and the liquid outlet is communicated with the barrel assembly.

[0033] The motor in the embodiments of the present application can be confined within the motor housing. A snap fastener is provided on one of the inner wall of the motor housing and the outer wall of the motor. The snap fastener engages with the other of the inner wall of the motor housing and the outer wall of the motor to confine the motor within the motor cavity. The snap fastener design simplifies and accelerates the assembly process between the motor and the motor housing, preventing the motor from detaching from the motor housing and improving the safety of motor operation. Furthermore, the snap fastener facilitates disassembly, allowing the motor to be quickly removed from the motor housing when maintenance or replacement is required, thereby improving maintenance efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0035] Figure 1 A schematic structural diagram of a piston pump provided in one embodiment of the present application;

[0036] Figure 2 for Figure 1 Schematic diagram of the partially exploded structure of the piston pump;

[0037] Figure 3 for Figure 1 Schematic diagram of the exploded structure of the piston pump;

[0038] Figure 4 A schematic diagram of the exploded structure of a piston pump provided in one embodiment of the present application (the pump head is omitted);

[0039] Figure 5 A schematic diagram of the exploded structure of a piston pump provided in another embodiment of the present application (the pump head is omitted);

[0040] Figure 6 A schematic diagram of the structure of a motor housing provided in one embodiment of the present application;

[0041] Figure 7 A schematic structural diagram of a pump body provided in one embodiment of the present application;

[0042] Figure 8 A schematic structural diagram of a pump body provided by an embodiment of the present application from another angle;

[0043] Figure 9 A schematic diagram of the exploded structure of a piston pump provided in one embodiment of the present application (with the drive assembly omitted);

[0044] Figure 10 A schematic diagram of the exploded structure of a piston pump provided in one embodiment of the present application (the pump body is omitted);

[0045] Figure 11 A schematic structural diagram of a valve plate provided in one embodiment of the present application;

[0046] Figure 12 A schematic structural diagram of a pump cover provided in one embodiment of the present application;

[0047] Figure 13 A schematic structural diagram of a pump cover provided by an embodiment of the present application from another angle;

[0048] Figure 14 A schematic diagram of the exploded structure of the piston and pump body provided in one embodiment of the present application;

[0049] Figure 15 This is a schematic diagram of the exploded structure of the piston and the third sealing member provided in one embodiment of the present application.

[0050] Description of reference numerals:

[0051] 100, piston pump; 10, pump body; 10a, piston chamber; 10b, leakage hole; 10c, second foolproof notch; 11, pump column housing; 111, housing 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 portion; 1121a, first guide slope; 113, first connecting portion; 113a, first connecting hole; 12, motor base; 12a, mounting cavity; 12b, through hole; 121, base body; 122, mounting plate; 122a, first fixing hole; 1221, limiting convex 1222, foolproof part; 20, piston; 20a, drive groove; 21, guide body; 21a, oil storage tank; 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; 14, assembly seat; 14a, second assembly hole; 14b, positioning hole; 30, drive assembly; 31, motor housing; 31a, motor cavity; 31b, wire hole; 31c, avoidance groove; 31d, groove; 31e, foolproof groove; 311, support ear; 311a, second fixing hole; 32, motor; 321, connecting ear; 32 1a, limiting hole; 321b, third fixing hole; 33, buckle; 331, first guide surface; 332, second guide surface; 34, shaft sleeve; 341, driving part; 342, convex 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, snap-fit ​​hole; 41h, buckle hole; 41h1, second guide slope; 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, bridge plate ; 415a, first assembly hole; 416, reinforcement seat; 42, valve plate; 42a, liquid inlet; 42b, liquid outlet; 42c, first fool-proof notch; 42d, limit notch; 421, plate body; 422, first blocking part; 423, fool-proof protrusion; 424, cantilever hook; 4241, plug-in part; 4242, hooking part; 425, second blocking part; 426, first stop part; 427, second stop part; 50, fixing part; 60, connecting part; 70, first sealing part; 80, second sealing part; 81, first sealing part; 82, second sealing part; 90, third sealing part; 91, liquid inlet one-way valve; 92, liquid outlet one-way valve. DETAILED DESCRIPTION

[0052] In order to make the purpose, technical solutions and advantages of this application more clearly understood, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0053] The embodiments of the present application relate to a clothing processing device. Currently, there are many types of clothing processing devices. Based on their functions, clothing processing devices generally include washing machines, dryers, and dehydrators. Among them, washing machines are used to automatically wash clothes. Washing machines are generally divided into drum washing machines and pulsator washing machines. Drum washing machines and fully automatic pulsator washing machines are usually equipped with an automatic dispensing system for dispensing detergent into the drum assembly, so that externally added laundry liquid, softener, and other detergents are flushed into the drum assembly through the inlet water to achieve clean washing of clothes.

[0054] The present embodiment is described below by taking a washing machine as an example of a clothes processing device, and other clothes processing devices can be considered similarly.

[0055] See also Figure 1 、 Figure 2 and Figure 3 The laundry treatment device includes a main body, a laundry treatment agent box, and a piston pump 100. The main body includes a housing and a drum assembly disposed within the housing. The housing is the external structure of the laundry treatment device, which protects the internal structure from the external environment. The drum assembly provides a space where the user can place clothes for washing. The clothes can be washed and rinsed in the drum assembly through rotation and water flow. The laundry treatment agent box is disposed on the housing and has a liquid storage chamber for storing laundry treatment agents, such as detergent, softener, and bleach. The liquid storage chamber can be divided into multiple compartments, each compartment being used to store a different laundry treatment agent. The piston pump 100 is a component for precisely controlling the dispensing of clothing treatment agent, which can reduce waste and inaccuracy when the user manually dispenses the agent. The piston pump 100 is connected to the clothing treatment agent box. The piston pump 100 has a liquid inlet 42a and a liquid outlet 42b. The liquid inlet 42a is unidirectionally connected to the liquid storage chamber, and the liquid outlet 42b is unidirectionally connected to the drum assembly. The piston pump 100 can extract the clothing treatment agent from the liquid storage chamber and transport it to the drum assembly, and ensure that the clothing treatment agent can only flow in one direction and not in the opposite direction, so as to avoid the clothing treatment agent from flowing back into the liquid storage chamber during the operation of the washing machine, affecting the washing effect.

[0056] The user needs to add laundry treatment agent to the laundry treatment agent box, and the piston pump 100 can automatically complete the dispensing process, eliminating the need for manual addition every time a load is washed, thus improving convenience. Furthermore, through the precise control of the piston pump 100, the laundry treatment agent can be released into the drum assembly at the appropriate time during the washing process, improving the washing effect.

[0057] Please continue reading Figure 2 and Figure 3 The present application provides a piston pump 100, which is applied to a clothing processing device. The piston pump 100 includes a pump assembly, a piston 20 and a drive assembly 30. The pump assembly has a piston chamber 10a and a liquid inlet 42a and a liquid outlet 42b connected to the piston chamber. The pump assembly includes a pump body 10 and a pump head 40. The pump body 10 is the outer shell of the piston chamber 10a, and has the above-mentioned piston chamber 10a. The piston 20 is arranged in the piston chamber 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, has certain corrosion resistance, is suitable for carrying clothing processing agents, and improves the durability of the pump body 10.

[0058] The piston 20 can be arranged in the piston chamber 10a so as to slide back and forth along the axial direction of the piston chamber 10a. It can be understood that a pump chamber is formed between the end of the piston 20 and the pump head 40. The piston 20 can change the volume of the pump chamber during the reciprocating sliding to achieve the suction or discharge of the clothing treatment agent.

[0059] 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 of which are connected to the piston chamber 10a. Specifically, when the piston 20 moves in a direction away from the pump head 40, the pump chamber generates negative pressure, and the clothing treatment agent is sucked from the clothing treatment agent box into the pump chamber through the liquid inlet 42a; when the piston 20 moves in a direction close to the pump head 40, the pressure in the pump chamber increases, and the clothing treatment agent is pushed out from the liquid outlet 42b and transported to the barrel assembly through the pump head 40, thereby realizing automatic delivery of the clothing treatment agent.

[0060] In the known related art, in order to install the piston 20 into the piston chamber 10a, the pump body 10 is generally set up in a split manner, for example, an additional cover is set up to jointly construct the piston chamber 10a with other parts, and the related art also provides an end cover for assembling the drive component 30 so that the drive component 30 is connected to a preset position.

[0061] In this embodiment, the pump body 10 is an integrated structure, directly forming the piston chamber 10a, which can reduce the number of connection points between different components, thereby reducing possible leakage points and failure points, enabling it to withstand longer periods of use, and improving the stability and reliability of the overall structure of the piston pump 100. The drive assembly 30 is connected to the pump body 10, and a portion of the drive assembly 30 extends into the piston chamber 10a to drive the piston 20 to slide back and forth, so that the reciprocating motion of the piston 20 runs smoothly. By using a portion of the pump body 10 as a mounting part for the drive assembly 30, the number of parts of the piston pump 100 is eliminated, thereby simplifying the assembly process. Due to the reduction in the number of parts, manufacturing costs are also reduced, including not only material costs, but also reduced processing and assembly costs.

[0062] Please continue reading Figure 2 and Figure 3 , it can be understood that 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 should be noted that in actual use, the piston pump 100 is installed vertically, with the first end located above the second end, that is, the pump head 40 is located above, wherein the piston chamber 10a has a connecting port 112a that passes through the first end of the pump body 10. During the installation process, the piston 20 can be installed in the piston chamber 10a through the connecting port 112a. The above-mentioned liquid inlet 42a and liquid inlet 42a are both connected to the piston chamber 10a through the connecting port 112a, and the drive assembly 30 is arranged closer to the second end than the first end, that is, the drive assembly 30 and the pump head 40 are respectively located near the top and bottom parts of the piston pump 100, which can effectively utilize space and reduce the occupied space of the piston pump 100.

[0063] The piston pump 100 also includes a liquid inlet check valve 91 and a liquid outlet check valve 92. The liquid inlet check valve 91 is connected to the valve plate 42 and is used to open and close the liquid inlet 42a. The liquid inlet check valve 91 allows the laundry treatment agent to flow from the laundry treatment chamber through the liquid inlet 42a into the piston chamber 10a, while preventing the liquid from flowing back into the laundry treatment chamber. The liquid outlet check valve 92 is connected to the side of the valve plate 42 facing away from the liquid inlet check valve 91 and is used to open and close the liquid outlet 42b. The liquid outlet check valve 92 allows the laundry treatment agent to flow from the piston chamber 10a through the liquid outlet 42b into the barrel assembly, while preventing the liquid from flowing back into the piston chamber 10a. The provision of the liquid inlet check valve 91 and the liquid outlet check valve 92 ensures that the flow of the laundry treatment agent within the piston chamber 10a is unidirectional, reducing the possibility of backflow when the piston pump 100 stops working.

[0064] Please continue reading Figure 2 and Figure 3 In some embodiments, the pump body 10 includes a pump column housing 11 and a motor base 12. The pump column housing 11 has a piston cavity 10a, that is, the pump column housing 11 is used to accommodate the movement of the piston 20 and can temporarily store the laundry treatment agent. The pump column housing 11 can be designed as a cylindrical shell, which helps to evenly distribute the pressure inside the pump column housing 11 and reduce local stress concentration. It can be understood that the pump column housing 11 and the motor base 12 are integrally formed, which reduces the risk of laundry treatment agent leakage 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, enabling it to withstand greater pressure and impact.

[0065] The motor base 12 provides installation space for the drive assembly 30, protecting it from displacement caused by external impacts. The motor base 12 is connected to the pump column housing 11, specifically to the outer peripheral wall of the pump column housing 11, so that the drive assembly 30 forms a stable connection with the pump body 10. The motor base 12 has a mounting cavity 12a, within which a portion of the drive assembly 30 can be mounted. The bottom wall of the mounting cavity 12a has a through hole 12b that communicates 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 reciprocate smoothly.

[0066] See also Figure 4 and Figure 5 In some embodiments, the motor seat 12 includes a seat body 121 and a mounting plate 122. The seat body 121 is connected to the pump column housing 11 and extends radially away from the pump column housing 11. The mounting plate 122 is connected to the side of the seat body 121 away from the pump column housing 11. The seat body 121 and the mounting plate 122 jointly constitute an installation cavity 12a, providing a stable installation space for the drive assembly 30.

[0067] The motor base 12 also includes support ribs 13, which are connected to the outer peripheral wall of the base body 121 and the outer surface of the mounting plate 122 facing away from the drive assembly 30. The support ribs 13 can increase the contact area between the mounting plate 122 and the base body 121, provide additional support points, and enhance the connection strength between the base body 121 and the mounting plate 122, effectively improving the overall stiffness of the motor base 12, enhancing the stability of the motor base 12, and reducing the deformation of the motor base 12 that may occur during the operation of the piston pump 100, thereby improving the durability and reliability of the motor base 12.

[0068] It is understandable that there are multiple support ribs 13, and the multiple support ribs 13 are respectively connected to both sides of the seat body 121 and the mounting plate 122, thereby improving the load capacity of the motor seat 12 and making the installation of the drive assembly 30 more stable.

[0069] Please continue reading 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. The motor 32 is assembled in the motor cavity 31a and is used to drive the piston 20 to reciprocate. The motor housing 31 provides a safety barrier for the motor 32 inside. It is understandable that the motor housing 31 can be made of a high-strength plastic shell, which has sufficient strength and durability to protect the motor 32 inside, is relatively lightweight, and has good insulation properties.

[0070] The motor housing 31 also has a wire hole 31b, which is arranged on the peripheral side wall of the motor housing 31. The wire hole 31b is connected to the motor cavity 31a. The wire hole 31b is used to lead out the power cable of the motor 32 from the motor cavity 31a, so that the lead-out and layout of the power cable of the motor 32 are more orderly, reducing entanglement between cables, and improving the neatness and aesthetics of the piston pump 100.

[0071] Please continue reading Figure 4 and Figure 5 To ensure that the motor 32 is retained within the motor housing 31 during assembly, a latch 33 is provided on one of the inner wall of the motor housing 31 and the outer wall of the motor 32. The latch 33 engages with the other of the inner wall of the motor housing 31 and the outer wall of the motor 32 to retain the motor 32 within the motor cavity 31a. The design of the latch 33 simplifies and accelerates the assembly of the motor 32 and the motor housing 31, preventing the motor 32 from detaching from the motor housing 31 and improving the safety of the motor 32 during operation. The latch 33 also facilitates disassembly, allowing the motor 32 to be quickly removed from the motor housing 31 when maintenance or replacement is required, thereby improving maintenance efficiency.

[0072] In one setting, when the outer wall surface of the motor 32 is configured to have a snap 33, correspondingly, the inner wall surface of the motor housing 31 is provided with a slot that can be engaged with the snap 33. During assembly, the motor 32 is pushed toward the inner wall surface of the motor housing 31 with appropriate force so that the snap 33 is tightly engaged with the slot.

[0073] In another configuration, when the inner wall surface of the motor housing 31 is configured with a snap 33, after the motor 32 is pushed into the motor cavity 31a, the snap 33 can be tightly engaged with the bottom of the motor 32. It is understandable that there can be multiple snaps 33, and the multiple snaps 33 are arranged at intervals along the circumference of the inner wall surface of the motor housing 31. The main body of the motor 32 is confined within the motor cavity 31a, and the multiple snaps 33 can evenly bear the load, reducing the stress concentration phenomenon of setting a single snap 33. In addition, the provision of multiple snaps 33 can increase multiple contact points, thereby improving the connection reliability between the motor 32 and the motor housing 31. There can be two, three or four snaps 33, and this application does not impose any restrictions on this.

[0074] like Figure 5 and Figure 6As shown, specifically, the buckle 33 has a first guide surface 331 that slides with the motor 32. The first guide surface 331 gradually tilts toward the central axis of the motor 32 along the direction of inserting the motor 32 into the motor cavity 31a. The provision of the first guide surface 331 allows the motor 32 to be inserted into the motor cavity 31a more smoothly and easily, reducing friction and resistance during the assembly process, simplifying the assembly process, and making the assembly of the motor 32 easier.

[0075] Furthermore, the buckle 33 also has a second guide surface 332 that slides with the motor 32. The second guide surface 332 gradually tilts toward the central axis of the motor 32 along 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 friction and resistance during the disassembly of the motor 32, and can reduce damage caused during the disassembly process, thereby extending the service life of the motor 32.

[0076] like Figure 5 、 Figure 6 and Figure 7 As shown, in order to ensure that the motor housing 31 is firmly connected to the pump body 10, specifically to the mounting plate 122, a first fixing member 50 is provided on the mounting plate 122, and the motor housing 31 has a second fixing hole 311a. The piston pump 100 also includes a fixing member 50, which is passed through the first fixing hole 122a and the second fixing hole 311a to lock the motor housing 31 and the pump body 10 to form a firm connection, thereby reducing the possibility of the drive assembly 30 loosening due to vibration or impact during the operation of the washing machine.

[0077] It is understandable that the first fixing hole 122a and the second fixing hole 311a can be threaded holes, and the fixing member 50 is a bolt, which is quick to assemble, can facilitate the installation and disassembly of the drive assembly 30 and the pump body 10, and also reduce the difficulty of subsequent maintenance.

[0078] It should be noted that the end surface of the mounting plate 122 facing the motor housing 31 is flat and can be supported by the end surfaces of the motor housing 31 and the bottom of the motor 32. The flat surface provides a flat and stable contact surface, which can provide firm support and facilitate quick alignment during assembly, helping to reduce errors during the installation process and making installation more convenient. It also helps to reduce noise and vibration generated by the drive assembly 30 during operation.

[0079] Furthermore, to further enhance assembly accuracy and convenience, a limiting protrusion 1221 is provided on one of the mounting plate 122 and the motor 32, while a limiting hole 321a is provided on the other. The limiting protrusion 1221 is inserted into the limiting hole 321a. The coordinated design of the limiting protrusion 1221 and the limiting hole 321a enables precise pre-positioning of the mounting plate 122 and the motor 32 during assembly, reducing assembly errors. This allows the motor 32 to be positioned correctly before it is fully secured, simplifying the assembly process. Due to the accuracy of the pre-positioning during the insertion and tightening of the fixing member 50, the entire assembly can be completed by a single person without the need for additional assistance.

[0080] The cooperation between 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 between the two during the operation of the piston pump 100, and extends the service life of the piston pump 100.

[0081] like Figure 5 、 Figure 6 and Figure 7 As shown, in some embodiments, the inner circumferential wall of the motor cavity 31a has an anti-idiot groove 31e; the mounting plate 122 is provided with an anti-idiot portion 1222 adapted to the anti-idiot groove 31e, and the anti-idiot portion 1222 is embedded in the anti-idiot groove 31e. Through the cooperation of the anti-idiot groove 31e and the anti-idiot portion 1222, it can be ensured that the motor 32 is correctly positioned during the assembly process, which can reduce the uncertainty and operation difficulty of the user when assembling the motor 32. In actual applications, the anti-idiot groove 31e can be an arc-shaped groove provided on the inner wall of the motor cavity 31a, and the anti-idiot portion 1222 is an arc-shaped plate adapted to the arc-shaped groove, and 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 perform circumferential alignment installation, the arc-shaped plate will abut against the bottom wall of the motor housing 31, providing a physical barrier. The user can quickly identify assembly problems and improve the user's assembly efficiency.

[0082] In order to achieve circumferential positioning between the motor 32 and the motor housing 31, the motor housing 31 also has a groove 31d, which is arranged on the cavity wall of the motor cavity 31a, located on the side close to the mounting plate 122. The groove 31d is connected to the motor cavity 31a, and the motor 32 is provided with a connecting ear 321. The connecting ear 321 is located on the outer periphery of the motor 32 and close to the side of the mounting plate 122. The connecting ear 321 can be clamped in the groove 31d to correctly position the motor 32 in the motor housing 31, thereby improving the assembly accuracy and consistency, and can also reduce the risk of displacement of the piston pump 100 due to vibration or impact during operation.

[0083] The motor housing 31 is provided with a support ear 311, and the support ear 311 and the connecting ear 321 are arranged opposite to each other. The support ear 311 has the above-mentioned second fixing hole 311a, and the connecting ear 321 has a third fixing hole 321b. The third fixing hole 321b is arranged at intervals with the limit block, and the fixing member 50 is sequentially passed through the second fixing hole 311a, the third fixing hole 321b and the first fixing hole 122a to form a solid connection structure, which effectively fixes the motor housing 31 and the motor 32 on the mounting plate 122, thereby enhancing the connection stability between the drive assembly 30 and the pump body 10.

[0084] It can be understood that in order to increase the stability of the connection between the motor housing 31, the motor 32 and the mounting plate 122, two connecting ears 321 and two supporting ears 311 are provided. The two connecting ears 321 are symmetrically arranged on the radial sides of the motor 32, and the two supporting ears 311 are symmetrically arranged on the radial sides of the motor housing 31. The mounting plate 122 includes a main board and two side plates. The main board can be semicircular. The side plates are respectively connected to the two sides of the main board and are arranged opposite to the connecting ears 321, which increases the connection points and improves the reliability of the connection between the drive assembly 30 and the mounting plate 122. It also helps to balance the load of the motor 32 during operation and reduce wear caused by uneven load.

[0085] Exemplarily, the connecting ear 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 protruded on the side of the mounting plate 122 facing the connecting ear 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, so that the motor 32 can run more smoothly and reduces the wear of the motor 32 caused by vibration during long-term operation.

[0086] In one configuration, the limiting protrusion 1221 is a half cylindrical protrusion (eg Figure 7 ), that is, the limiting protrusion 1221 is a semi-cylinder. On the one hand, it can be more easily aligned and inserted into the limiting hole 321a during assembly, reducing the assembly time; on the other hand, there is a gap between the semi-cylinder and the limiting hole 321a, allowing the motor 32 to have a certain vibration space during operation, reducing structural damage caused by vibration.

[0087] Furthermore, in order to avoid the assembly of the fixing part 50 and avoid interference between the fixing part 50 and the outer wall surface of the motor housing 31, the outer wall surface of the motor housing 31 is provided with an avoidance groove 31c, and the avoidance groove 31c is extended along the axial direction of the motor 32. The second fixing hole 311a is located on the extension path of the avoidance groove 31c. The avoidance groove 31c is used to avoid the fixing part 50 inserted in the second fixing hole 311a, so that the fixing part 50 can smoothly pass through the second fixing hole 311a without conflicting with the outer wall surface of the motor housing 31.

[0088] The avoidance groove 31c provides a clear assembly path, allowing the fixing member 50 to be inserted into the second fixing hole 311a along the predetermined assembly path, thus reducing assembly difficulty. Furthermore, the provision of the avoidance groove 31c prevents the extension length of the support lug 311 and the connecting lug 321 from being excessively long. This would reduce the structural strength and compromise assembly stability if the second fixing hole 311a were positioned too far from the main body of the motor housing 31. The provision of the avoidance groove 31c improves the compactness of the piston pump 100.

[0089] Please continue reading Figure 5 、 Figure 6 and Figure 7 In some embodiments, the seat body 121 has the above-mentioned through hole 12b, and the drive assembly 30 also includes a sleeve 34, which is sleeved on the motor 32 shaft of the motor 32. The direct connection between the sleeve 34 and the motor 32 shaft can reduce energy loss and improve transmission efficiency. Due to the drive of the motor 32 shaft, the sleeve 34 can be rotatably arranged in the mounting cavity 12a. A driving portion 341 is eccentrically provided on the side of the sleeve 34 away from the motor 32. The driving portion 341 is passed through the through hole 12b and is connected to the piston 20. Specifically, the piston 20 can be provided with a driving groove 20a, which is perpendicular to the axial direction of the piston 20 cavity 10a and extends laterally along the width direction of the piston 20. Part of the driving portion 341 can be inserted into the driving groove 20a. When the motor 32 shaft rotates, the driving portion 341 will move along a circular path. The radius of this circular path is the distance from the center of the driving portion 341 to the center of the motor 32 shaft. When the driving portion 341 is connected to the driving groove 20a, the piston 20 will be pushed to make a linear motion along the piston cavity 10a.

[0090] Among them, the outer wall ring of the sleeve 34 is provided with a convex ring 342, and the diameter of the convex ring 342 is larger than the diameter of the through hole 12b, so that the lower end face of the convex ring 342 abuts against the bottom wall of the installation cavity 12a. The convex ring 342 provides an additional support point, which enhances the connection strength between the sleeve 34 and the seat body 121, and can limit the sleeve 34 to prevent the sleeve 34 from falling completely into the piston cavity 10a, so that the sleeve 34 is correctly positioned on the seat body 121, so that the driving part 341 can be correctly connected to the piston 20 to play its role.

[0091] In actual use, the liquid inlet 42a needs to be connected to the liquid storage chamber of the laundry treatment agent box, and the liquid outlet 42b needs to be connected to the barrel assembly. If the pump head 40 and the pump body 10 are assembled incorrectly, the following consequences may occur: the liquid inlet 42a is connected to the barrel assembly, while the liquid outlet 42b is connected to the liquid storage chamber, which will cause the piston pump 100 to lose the function of automatically dispensing laundry treatment agent. Therefore, if Figure 8 and Figure 9 As shown, the pump head 40 is provided with a first anti-foolproof notch 42c, and the pump body 10 is provided with a second anti-foolproof notch 10c. The first anti-foolproof notch 42c and the second anti-foolproof notch 10c correspond to each other. The setting of the first anti-foolproof notch 42c and the second anti-foolproof notch 10c effectively prevents the incorrect assembly of the pump head 40 and the pump body 10, improves the accuracy and efficiency of the assembly, and avoids failures or safety accidents of the piston pump 100 that may be caused by improper assembly.

[0092] like Figure 8 、 Figure 9 and Figure 10 As shown, in some embodiments, the pump head 40 includes a pump cover 41 and a valve plate 42. The pump cover 41 is further provided with a receiving groove 41e on the side facing the connecting plate 112. The receiving groove 41e is connected to both the liquid inlet channel 41a and the liquid outlet channel 41b. At least a portion of the valve plate 42 is accommodated in the receiving groove 41e and is 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 chamber 10a. The pump cover 41 can limit the valve plate 42 through the receiving groove 41e, so that the valve plate 42 maintains 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, and the pump cover 41 is also provided with a liquid inlet channel 41a connected to the liquid inlet 42a, and a liquid outlet channel 41b connected to the liquid outlet 42b. It can be understood that the liquid inlet channel 41a is connected to the liquid storage chamber of the clothing treatment agent box, and the liquid outlet channel 41b is connected to the cylinder assembly, forming a complete path for the clothing treatment agent to enter and exit the piston chamber 10a.

[0093] Among them, the valve plate 42 is provided with the above-mentioned first anti-foolproof notch 42c, and the first anti-foolproof notch 42c penetrates the valve plate 42 along the thickness direction of the valve plate 42, and the pump cover 41 is provided with a third anti-foolproof notch 41c, and the third anti-foolproof notch 41c penetrates the pump cover 41 along the thickness direction of the pump cover 41, that is, the shape of the accommodating groove 41e is also consistent with the shape of the valve plate 42. Since the valve plate 42 is provided with a liquid inlet 42a and a liquid outlet 42b, and the pump cover 41 is provided with a liquid inlet channel 41a and a liquid outlet channel 41b, during assembly, it is necessary to align the liquid inlet 42a with the liquid inlet channel 41a, and the liquid outlet channel 41b with the liquid outlet 42b. The provision of the third anti-foolproof notch 41c can enable the valve plate 42 and the pump cover 41 to be correctly aligned during assembly, thereby reducing assembly time and improving assembly accuracy.

[0094] The design of first and third notches 42c, 41c makes the assembly process more intuitive and simple, allowing the operator to quickly identify the correct assembly direction and position, reducing assembly time and the risk of component damage due to forced or incorrect assembly. Furthermore, the design of first, second, and third notches 42c, 10c, 41c facilitates machine identification and positioning, facilitating automated assembly of piston pump 100, such as on an automated assembly line.

[0095] For example, when the valve plate 42 is a rectangular plate, the first anti-mistake notch 42c is a missing corner of the rectangular plate. Only when the valve plate 42, the pump body 10 and the pump cover 41 are aligned in the correct manner can the assembly be completed, thereby ensuring the accuracy of the assembly. The missing corner provides a clear visual cue for the operator, making the assembly direction and position clear at a glance, simplifying the assembly process.

[0096] Please continue reading Figure 8 、 Figure 9 and Figure 10 , for the pump body 10, it can be understood that the second anti-foolproof notch 10c is provided on the pump column housing 11 and is located on the side close to the pump head 40. The pump column housing 11 includes a shell body 111, a connecting plate 112 and a plurality of spaced first connecting portions 113. The shell body 111 has the above-mentioned piston chamber 10a. The connecting plate 112 is connected to the first end of the shell body 111, that is, the side close to the pump head 40. The connecting plate 112 has the above-mentioned second anti-foolproof notch 10c, and the plurality of spaced first connecting portions 113 are connected to the outer edge of the connecting plate 112, wherein the first connecting portion 113 has a first connecting hole 113a, and 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, and the piston pump 100 also includes a connecting member 60, which is inserted into the first connecting hole 113a and the second connecting hole 412a to fix the pump cover 41 to the connecting plate 112, thereby helping to improve the connection stability between the pump column housing 11 and the pump cover 41.

[0097] A plurality of first connection portions 113 are arranged at intervals on the outer edge of the connecting plate 112, which can achieve circumferential connection stability between the pump column housing 11 and the pump head 40, increase the connection points between the pump column housing 11 and the pump cover 41, thereby improving the strength of the connection and reducing the displacement of the pump head 40 during the operation of the piston pump 100.

[0098] It can be understood that four first connecting parts 113 can be provided, and the connecting plate 112 is a rectangular plate. The four first connecting parts 113 are respectively located in the middle of each side of the rectangular plate, so that the connection between the pump cover 41 and the connecting plate 112 is more balanced, and can more effectively resist deformation or damage caused by uneven force; and evenly distribute the connection load, reduce local stress concentration, and extend the service life of the connecting part 60.

[0099] Furthermore, the first connecting hole 113a and the second connecting hole 412a can be threaded holes, and the connecting member 60 is a bolt, which is inserted into the two threaded holes in sequence. The threaded connection facilitates installation and adjustment, and also allows the pump head 40 to be quickly disassembled when necessary, which facilitates maintenance and repair.

[0100] In order to make the connection between the second connecting portion 412 and the second connecting portion 412 tighter, the pump cover 41 includes a cover body 411, the cover body 411 has the above-mentioned accommodating groove 41e, and multiple second connecting portions 412 are connected to the outer edge of the cover body 411. The pump cover 41 also has multiple connecting grooves 41d, which are arranged on the groove peripheral wall of the accommodating groove 41e, and the connecting grooves 41d are arranged closer to the connecting plate 112 than the second connecting portion 412. The multiple connecting grooves 41d are arranged one by one with the multiple second connecting portions 412, and the first connecting portion 113 is passed through the connecting plate 112. In 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 alignment of the first connecting part 113 and the second connecting part 412 is easier, so that the end face of the first connecting part 113 fits with the end face of the second connecting part 412, thereby improving the tightness of the connecting part 60 connecting the pump cover 41 and the connecting plate 112. The tight fit of the end faces also helps to prevent leakage of the clothing treatment agent, thereby ensuring the sealing between the pump cover 41 and the connecting plate 112.

[0101] like Figure 8 As shown, it should be noted that the end surface of the first connecting portion 113 near the first end is higher than the end surface of the connecting plate 112 near the first end, and the valve plate 42 has a limiting notch 42d, and the limiting notch 42d can be limited and matched with part of the outer peripheral wall of the first connecting portion 113, that is, multiple first connecting portions 113 can abut against the valve plate 42 in the circumferential direction, so that the valve plate 42 can be accurately positioned during installation, reducing assembly errors.

[0102] Please continue reading Figure 9In some embodiments, one of the pump cover 41 and the connecting plate 112 is provided with a snap-fit ​​portion 1121, and the other of the pump cover 41 and the connecting plate 112 is provided with a snap-fit ​​hole 41h. Part of the snap-fit ​​portion 1121 is snapped into the snap-fit ​​hole 41h. During assembly, the snap-fit ​​portion 1121 is snapped into the snap-fit ​​hole 41h to pre-connect the pump cover 41 and the connecting plate 112. This prepares the alignment work for the subsequent insertion of the connector 60 to lock the pump cover 41 and the connecting plate 112. After the pump cover 41 and the connecting plate 112 are pre-connected, the assembler can independently complete the locking work of the connector 60 without the help of others, reducing the difficulty of assembling the pump cover 41 and the connecting plate 112.

[0103] like Figure 9 and Figure 10 As shown, in one setting, a snap-fit ​​portion 1121 and a snap-fit ​​hole 41h form a group. In this embodiment, multiple groups of snap-fit ​​portions 1121 and snap-fit ​​holes 41h can be provided. For example, two groups are provided, and the two groups of snap-fit ​​portions 1121 and snap-fit ​​holes 41h are arranged diagonally. Four groups can also be provided, and the four groups of snap-fit ​​portions 1121 and snap-fit ​​holes 41h are respectively provided at the four corners. This application does not impose any restrictions on this.

[0104] Specifically, the connecting plate 112 is provided with a snap-fit ​​portion 1121, which is located at the outer edge of the connecting plate 112 and extends from the inside to the outside. The snap-fit ​​portion 1121 has a first guide slope 1121a. The pump cover 41 is provided with a snap-fit ​​hole 41h, which has a second guide slope 41h1. The second guide slope 41h1 is provided on the side wall of the accommodating groove 41e. The snap-fit ​​hole 41h passes through the side wall of the accommodating groove 41e. When the connecting plate 112 and the pump cover 41 are snap-fitted, the snap-fit ​​portion 1121 slides against the second guide slope 41h1 via the first guide slope 1121a, allowing the snap-fit ​​portion 1121 to slide into the snap-fit ​​hole 41h. The provision of the first guide slope 1121a and the second guide slope 41h1 can guide the movement path of the snap-fit ​​portion 1121, simplifying the assembly process.

[0105] In order 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 communicating port 112a. The communicating port 112a is communicated with the piston chamber 10a. The first sealing groove 112b is arranged in an annular shape around the communicating port 112a. The piston pump 100 also includes a first sealing member 70, which is embedded in the first sealing groove 112b. It can be understood that the first sealing member 70 is an annular sealing member. The first sealing member 70 is used to seal the connecting plate 112 and the valve plate 42. The provision of the first sealing member 70 can effectively prevent the clothing treatment agent from leaking from the communicating port 112a, and can also prevent external impurities from entering the communicating port 112a, so as to ensure a good seal between the connecting plate 112 and the valve plate 42.

[0106] Please continue reading Figure 9 and Figure 10 Then, a first annular sealing portion 422 is provided on the side of the valve plate 42 facing the connecting plate 112. The first sealing portion 422 squeezes the first seal 70 in the direction of the first sealing groove 112b to press the first seal 70 against the bottom wall of the first sealing groove 112b, which helps to maintain the accuracy of the sealing position of the first seal 70 during the use of the piston pump 100, and prevents the first seal 70 from being separated from the first sealing groove 112b due to external vibration, thereby causing the seal to fail. After being evenly squeezed, the first seal 70 can fill the gap between the valve plate 42 and the connecting plate 112, thereby improving the sealing effect of the first seal 70.

[0107] It can be understood that the shape and size of the first blocking portion 422 are adapted to the shape and size of the first sealing member 70 , that is, the first blocking portion 422 is an annular blocking portion, so that the first sealing member 70 is effectively squeezed.

[0108] In some embodiments, the connecting plate 112 is provided with a plurality of weight-reducing grooves 112c (e.g. Figure 7 ), multiple weight-reducing grooves 112c are arranged at intervals along the outer peripheral side of the first sealing groove 112b. On the one hand, the provision of the weight-reducing grooves 112c can appropriately reduce the weight of the connecting plate 112, reduce the use of materials, and achieve lightweighting of the piston pump 100; on the other hand, the provision of the weight-reducing grooves 112c helps to reduce the internal stress of the material during the injection molding process, thereby reducing cracks caused by stress concentration when the connecting plate 112 is demolded.

[0109] In some embodiments, the second end of the pump body 10 is provided with a leakage hole 10b (eg Figure 8 ), specifically opened at the second end of the shell body 111, the leakage hole 10b is connected with the piston cavity 10a. Since the piston pump 100 is installed vertically and the 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 clothes treating agent in the pump cavity, the clothes treating 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 leakage hole 10b connected with the piston cavity 10a, the clothes treating agent will flow out from the leakage hole 10b, which can be intuitively discovered by the user, so that the leakage problem can be dealt with in time, reducing the time and difficulty of fault diagnosis.

[0110] like Figure 10As shown, in order to achieve a double anti-foolproofing effect in 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 an anti-foolproofing hole 41f, and at least the other of the valve plate 42 and the pump cover 41 is provided with an anti-foolproofing protrusion 423, and the anti-foolproofing protrusion 423 is inserted into the anti-foolproofing hole 41f to enable the correct alignment and assembly between the valve plate 42 and the pump cover 41, thereby reducing the difficulty and error rate of assembly, and can cooperate with the first anti-foolproofing notch 42c and the third anti-foolproofing notch 41c to form a double anti-foolproofing effect.

[0111] Understandably, during the actual assembly process, the liquid inlet check valve 91 and the liquid outlet check 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 foolproof hole 41f and the foolproof 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 arranged opposite each other and connected. This incorrect assembly will directly affect the normal operation of the piston pump 100. The provision of the foolproof protrusion 423 and the foolproof hole 41f can effectively prevent the occurrence of such an assembly error.

[0112] Specifically, the pump cover 41 is provided with an anti-foolproof hole 41f, which can be set on the bottom wall of the accommodating cavity and pass through the bottom wall of the accommodating cavity. The valve plate 42 is provided with an anti-foolproof protrusion 423. The valve plate 42 includes a plate body 421 and an anti-foolproof protrusion 423. The anti-foolproof protrusion 423 is set on the side of the plate body 421 facing the pump cover 41, and the anti-foolproof protrusion 423 is inserted into the anti-foolproof hole 41f.

[0113] Two anti-fool protrusions 423 can be provided, and the two anti-fool protrusions 423 are set diagonally. The diagonal layout helps the anti-fool protrusions 423 to evenly distribute force during the assembly process, reducing damage to the anti-fool protrusions 423 caused by excessive force on a single point, and the diagonally arranged anti-fool protrusions 423 can prevent the valve plate 42 from rotating during the assembly process, thereby playing a positioning role.

[0114] like Figure 10 and Figure 11 As shown, in some embodiments, the pump cover 41 is provided with a snap-in hole 41g, and the valve plate 42 further includes a cantilever hook 424, one end of the cantilever hook 424 is connected to the plate body 421 at an angle, and the other end is snap-fitted with the snap-in hole 41g, so that the pump cover 41 and the valve plate 42 form a firm connection to prevent the connection from loosening due to vibration or pressure changes. The provision of the cantilever hook 424 and the snap-in hole 41g can realize the rapid assembly and disassembly of the pump cover 41 and the valve plate 42.

[0115] like Figure 11As shown, specifically, the cantilever 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 extend toward the direction of the pump cover 41, and pass through the hooking 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 hooked with 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.

[0116] The cantilever hook 424 also includes a reinforcement portion, which is connected to the plug-in portion 4241 and the plate body 421. The reinforcement portion helps to improve the stability of the cantilever hook 424 during use, reduce the breakage of the plug-in portion 4241 due to external force, and improve the durability of the cantilever hook 424.

[0117] Two cantilever hooks 424 can be provided, and the two cantilever hooks 424 are arranged diagonally to increase the stability between the valve plate 42 and the pump cover 41, and reduce the deformation or damage caused by excessive force on a single cantilever hook 424 as a connection point. The diagonally arranged cantilever hooks 424 help prevent the pump cover 41 from tilting when subjected to uneven force, and maintain the flatness of the pump cover 41.

[0118] Exemplarily, the plate body 421 can be a rectangular plate, and the two cantilever hooks 424 and the two anti-mistake 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.

[0119] like Figure 10 、 Figure 12 and Figure 13 As shown, in some embodiments, the pump cover 41 includes a cover body 411, the cover body 411 has a receiving groove 41e and a second sealing groove 411a that are connected to each other, the receiving groove 41e accommodates the plate body 421, the outlet of the liquid inlet channel 41a is provided at the bottom wall of the receiving groove 41e and is connected to the liquid inlet 42a, the inlet of the liquid outlet channel 41b is provided at the bottom wall of the receiving groove 41e and is connected to the liquid outlet 42b, the second sealing groove 411a is provided around the outlet of the liquid inlet channel 41a and the outlet of the liquid outlet channel 41b The periphery of the inlet; the piston pump 100 also includes a second seal 80, which is embedded in the second sealing groove 411a. The second seal 80 is used to seal the connection between the cover body 411 and the plate body 421. The second seal 80 can effectively seal the connection between the outlet of the liquid inlet channel 41a and the liquid inlet 42a, as well as the connection between the liquid outlet channel 41b and the liquid outlet 42b, to prevent the clothing treatment agent from leaking at the connection between the cover body 411 and the plate body 421, thereby ensuring the normal operation of the piston pump 100.

[0120] like Figure 10 and Figure 11 As shown, the valve plate 42 also includes a second sealing portion 425, which is connected to the side of the plate body 421 facing the accommodating groove 41e. The second sealing portion 425 is used to squeeze the second sealing member 80 toward the accommodating groove 41e to press the second sealing member 80 evenly and tightly against the 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, thereby improving the sealing effect of the second sealing member 80.

[0121] like Figure 10 As shown, specifically, the second sealing member 80 includes a first sealing portion 81 and a second sealing portion 82 which are interconnected in sequence as a whole. The first sealing portion 81 is arranged at the inlet of the liquid outlet channel 41b, and the second sealing portion 82 is 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 blocking portion 425 are consistent with the shape of the first sealing member 70. It should be noted that the first sealing portion 81 and the second sealing portion 82 are integrally formed to improve the strength and durability of the second sealing member 80.

[0122] like Figure 12 and Figure 13 As shown, since the second sealing groove 411a is set on the bottom wall of the accommodating groove 41e, the part of the cover body 411 where the second sealing groove 411a is set is thinner. In order to maintain the structural strength of the cover body 411, a reinforcing seat 416 can be protruded on the side of the cover body 411 away from the second sealing groove 411a. The reinforcing seat 416 can compensate for the structural weaknesses of the cover body 411 and improve the overall strength of the cover body 411. During the operation of the piston pump 100, the cover body 411 will be affected by the internal pressure, and the provision of the reinforcing seat 416 helps to prevent the cover body 411 from deformation under the action of pressure, thereby improving the durability of the cover body 411.

[0123] like 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.

[0124] 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.

[0125] 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.

[0126] 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.

[0127] The two second assembly holes 14a are symmetrically arranged along the vertical plane of the piston chamber 10a's axis. That is, the line connecting the two second assembly holes 14a is perpendicular to the piston chamber 10a's axis. This vertical assembly strengthens the connection between the laundry treatment agent box and the pump cover 41, reducing structural weaknesses caused by improper assembly. The vertical positioning of the first assembly hole 415a, combined with the lateral positioning of the second assembly hole 14a, secures the piston pump 100 in multiple dimensions, further improving the stability of the piston pump 100's connection.

[0128] 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 chamber 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.

[0129] Please continue reading Figure 7 、 Figure 8 and Figure 12 In some embodiments, the pump body 10 further includes two assembly seats 14, which are respectively connected to both sides of the pump column housing 11. Specifically, they can be symmetrically arranged along the vertical plane where the axial direction of the piston cavity 10a is located. The symmetrically arranged assembly seats 14 can ensure that the piston pump 100 is subjected to more uniform force when assembled with the clothing treatment agent box, reducing deformation or damage caused by unilateral force, and the two second assembly holes 14a are limited in the transverse direction of the piston pump 100 to prevent the piston pump 100 from rotating after assembly, thereby keeping it connected in the correct position.

[0130] Along the axial direction of the piston chamber 10a, the assembly seat 14 is located between the pump head 40 and the motor seat 12, and each assembly seat 14 has at least one of the above-mentioned second assembly holes 14a. It can be understood that the second assembly hole 14a is arranged closer to the motor 32 than the first assembly hole 415a, and the motor 32 will generate vibration during operation. By arranging the second assembly hole 14a near the motor 32, the vibration generated by the motor 32 during operation can be better absorbed and dispersed, the stress caused by the vibration can be resisted, and the separation of the piston pump 100 and the clothing treatment agent box due to vibration can be reduced.

[0131] Exemplarily, the first assembly hole 415a and the second assembly hole 14a can both be threaded holes, and corresponding threaded holes are provided at relative positions of the clothing treatment agent box, that is, the piston pump 100 is threadedly connected to the clothing treatment agent box, providing a reliable fixing method to ensure a firm connection between the clothing treatment agent box and the pump cover 41 or the assembly seat 14, which is not easy to loosen.

[0132] Furthermore, in order to reduce the difficulty of assembling the assembly seat 14 and the clothing treatment agent box, the assembly seat 14 also has a positioning hole 14b arranged at intervals with the second assembly hole 14a. The positioning hole 14b is used to achieve pre-positioning with the clothing treatment agent box. It can be understood that the clothing treatment agent box is provided with a positioning portion adapted to the positioning hole 14b. The positioning portion can be passed through the positioning hole 14b to enable the piston pump 100 to achieve pre-positioning with the clothing treatment agent box, and the assembler then locks the clothing treatment agent box through the second assembly hole 14a.

[0133] In some embodiments, the first assembly hole 415a is provided on the pump cover 41 and is located between the liquid inlet channel 41a and the liquid outlet channel 41b, which helps to match the symmetry of the pump cover 41 and reduce the possibility of eccentricity or misalignment caused by the setting of the first assembly hole 415a, thereby enhancing the structural stability of the pump cover 41.

[0134] See also Figure 12 and Figure 13 In some embodiments, the pump cover 41 further includes an inlet pump nozzle 413, an outlet pump nozzle 414 and a bridging plate 415. The inlet pump nozzle 413 and the outlet pump nozzle 414 are both connected to the cover body 411 or the side of the reinforcement seat 416 away from the accommodating groove 41e. The inlet pump nozzle 413 has the above-mentioned inlet channel 41a, and the outlet pump nozzle 414 has the above-mentioned outlet channel 41b. Both ends of the bridging plate 415 are connected to the inlet pump nozzle 413 and the outlet pump nozzle 414, and are located between the inlet pump nozzle 413 and the outlet pump nozzle 414. The provision of the bridging plate 415 helps to disperse the force applied to the pump cover 41, reduce local stress concentration, and reduce the impact of vibration on the inlet pump nozzle 413 and the outlet pump nozzle 414, thereby enhancing the structural stability and strength of the pump cover 41.

[0135] The bridging plate 415 is also connected to the side of the cover body 411 or the reinforcement seat 416 away from the accommodating groove 41e, and extends toward the side away from the accommodating groove 41e. The bridging plate 415 has the above-mentioned first assembly hole 415a, which optimizes the structural layout of the pump cover 41, making the layout of the liquid inlet channel 41a, the liquid outlet channel 41b and the first assembly hole 415a more compact and reasonable, thereby improving the design efficiency.

[0136] Specifically, the bridging plate 415 includes a first plate body and a second plate body, the first plate body is connected to the cover body 411, and extends in a direction away from the accommodating groove 41e, the second plate body is stacked on the first plate body, and is located on a side close to the cover body 411, wherein the first assembly hole 415a passes through the first plate body and the second plate body, and the position of the first assembly hole 415a is thickened to compensate for the problem of reduced structural strength caused by the setting of the first assembly hole 415a, thereby enhancing the stability and durability of the bridging plate 415.

[0137] The cover body 411 , the liquid inlet pump nozzle 413 , the liquid outlet pump nozzle 414 and the bridging plate 415 are integrally formed, thereby improving the structural strength and stability of the pump cover 41 and reducing the time and maintenance cost of assembling the pump cover 41 .

[0138] like Figure 14 and Figure 15 As shown, in some embodiments, the piston chamber 10a has a connecting port 112a that passes through one end of the pump body 10, and an assembly portion 221 is provided on the side of the piston 20 facing the connecting port 112a. The assembly portion 221 is used to cooperate with an external assembly tool to install the piston 20 in the piston chamber 10a. The design of the assembly portion 221 makes the installation of the piston 20 easier. By cooperating with the external assembly tool, the piston 20 can be installed in place quickly and accurately, thereby improving the assembly efficiency. The design of the assembly portion 221 can adapt to the needs of the automated assembly line, so that the installation of the piston 20 can be automated, thereby improving production efficiency and consistency.

[0139] In one embodiment, the assembly portion 221 is a mounting protrusion that facilitates gripping and positioning by automated assembly machinery, making it suitable for automated or semi-automated assembly lines and improving production efficiency. The mounting protrusion can be integrally formed with the plug body 22, reducing material weaknesses and increasing the overall structural strength of the plug body 22.

[0140] In another configuration, the assembly portion 221 is a mounting slot, specifically one of a hexagonal socket, a slotted slot, or a cross slot. Hexagonal sockets, slotted slots, and cross slots are all common screw head slot types, each suitable for different assembly tools and environments, providing a variety of options to accommodate different assembly needs. Understandably, in actual use, the assembly portion 221 is a slotted slot. The slotted slot design provides clear directional directionality, which is crucial for installing the piston 20 within the piston chamber 10a, ensuring that the piston 20 is installed in the correct orientation.

[0141] Please continue reading 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 slides with the inner wall of the piston cavity 10a, and the plug body 22 is connected to the end of the guide body 21, and the end is 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, and the cross-sectional area of ​​the plug body 22 is larger than the cross-sectional area of ​​the guide body 21, so that a pump cavity is constructed between the plug body 22 and the pump head 40, thereby reducing the flow of clothing treatment agent into the part of the piston cavity 10a where the guide body 21 is located, thereby reducing the risk of leakage.

[0142] 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 movements, improve the durability of the piston 20 , and extend the service life of the piston 20 .

[0143] In order to reduce the risk of leakage of clothing treatment agent, a third sealing groove 22a is provided on the outer wall ring of the plug body 22. The piston pump 100 also includes a third sealing member 90, which is embedded in the third sealing groove 22a. The third sealing member 90 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 clothing treatment agent into the part of the piston cavity 10a where the guide body 21 is located.

[0144] Multiple third sealing grooves 22a can be provided, spaced apart along the axial direction of the piston chamber 10a. Multiple third sealing members 90 are embedded in each of the plurality of third sealing grooves 22a, forming a multi-layered sealing barrier. This design significantly enhances the sealing effect, effectively preventing the laundry treatment agent from leaking into the second end of the pump body 10 during high pressure or prolonged use. The provision of multiple third sealing members 90 provides a more reliable sealing effect.

[0145] Please continue reading Figure 14 and Figure 15 In some embodiments, the guide body 21 is provided with a first guide portion 211, which is located on the central axis of the guide body 21, and an axially extending first guide rail 1111 is provided on the inner wall of the piston chamber 10a. The axially extending first guide rail 1111 provides a stable guide and enhances the sliding reliability of the piston 20. The first guide portion 211 is slidably arranged in the first guide rail 1111 to ensure that the piston 20 moves in an axial straight line in the piston chamber 10a, thereby improving the accuracy and stability of the movement.

[0146] It can be understood that the first guide rail 1111 includes a first guide rail section and a second guide rail section, the first guide rail section and the second guide rail section are arranged in parallel, the first guide section 211 slides between the first guide rail and the second guide rail, and the first guide rail section and the second guide rail section provide a stable sliding path.

[0147] When the assembly portion 221 is configured as a slotted groove, the slotted groove design allows assembly tools (such as a screwdriver) to easily engage the assembly portion 221, enabling rapid assembly of the piston 20. The length of the slotted groove 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 of the axial direction of the piston cavity 10a. This perpendicular relationship helps ensure that when the slotted groove is assembled, the first guide portion 211 can also be smoothly aligned and assembled with the first guide rail 1111, thereby improving assembly efficiency and accuracy.

[0148] Furthermore, the inner wall of the piston chamber 10a is also provided with a second guide rail 1112 and a third guide rail 1113 arranged opposite to each other, and the second guide rail 1112 and the third guide rail 1113 are both extended along the axial direction of the piston chamber 10a, and the guide body 21 is also provided with a second guide portion 212 and a third guide portion 213, and the second guide portion 212 and the third guide portion 213 are respectively located on both sides of the width direction of the guide body 21, and the second guide portion 212 and the third guide portion 213 are respectively slidably connected to the second guide rail 1112 and the third guide rail 1113, which can ensure that the axial linear motion of the piston 20 in the piston chamber 10a is more precise and stable, and the second guide portion 212 and the third guide portion 213 can limit the deflection of the piston 20 in the circumferential direction of the piston chamber 10a, thereby enhancing the ability of the piston 20 to resist lateral force and maintaining the linearity and stability of the movement.

[0149] In order to make the piston 20 slide more smoothly within the piston chamber 10a, a lubricating medium can be applied to the inner wall of the piston chamber 10a to reduce direct contact and reduce wear on the piston 20. The guide body 21 is also provided with two oil storage grooves 21a. Along the axial direction of the piston chamber 10a, the two oil storage grooves 21a are respectively located adjacent to the second guide portion 212 and the third guide portion 213. The oil storage grooves 21a are used to collect the lubricating medium within the piston chamber 10a. When the lubricating medium in the piston chamber 10a is excessive, it may cause blockage. Therefore, it is necessary to reduce the resistance caused by the accumulation of lubricating medium. The provision of the oil storage grooves 21a can effectively collect excess lubricating medium during the movement of the second guide portion 212 and the third guide portion 213. When the excess lubricating medium overflows, it can be effectively redistributed as the piston 20 moves.

[0150] In the description of this application, it should be understood that if the terms "up", "down", "left", "right", etc. indicate an orientation or position relationship based on the orientation or position relationship shown in the drawings, it is only for the convenience of describing this application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the position relationship in the drawings are only used for illustrative purposes and cannot be understood as a limitation on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0151] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to imply or suggest relative importance or implicitly indicate the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0152] In the description of this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components, unless otherwise expressly limited. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0153] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0154] The above content is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A piston pump, characterized in that: include: A pump assembly having a piston chamber and a liquid outlet and a liquid inlet both communicating with the piston chamber; a piston, disposed in the piston cavity so as to be slidable reciprocatingly along the axial direction of the piston cavity; as well as A drive assembly connected to the pump assembly, comprising a motor housing and a motor, wherein the motor housing has a motor cavity, the motor is assembled in the motor cavity, and the motor is used to drive the piston to reciprocate; Wherein, one of the inner wall surface of the motor housing and the outer wall surface of the motor has a snap, and the snap is engaged with the other of the inner wall surface of the motor housing and the outer wall surface of the motor to limit the motor to be located in the motor cavity.

2. The piston pump according to claim 1, characterized in that There are multiple buckles, and the buckles are arranged at intervals along the circumferential direction of the inner wall surface of the motor housing.

3. The piston pump according to claim 1, characterized in that The inner wall surface of the motor housing has the buckle, and the buckle has a first guide surface that slides with the motor, and the first guide surface gradually tilts toward the central axis of the motor along the direction in which the motor is inserted into the motor cavity.

4. The piston pump according to claim 1, characterized in that The buckle further comprises a second guide surface that is slidably engaged with the motor, and the second guide surface gradually tilts toward the central axis of the motor along the direction in which the motor moves out of the motor cavity.

5. The piston pump according to claim 1, characterized in that The motor housing is provided with a wire hole, the wire hole is connected to the motor cavity, and the wire hole is used to lead out the power cable of the motor from the motor cavity.

6. The piston pump according to claim 1, characterized in that The pump assembly comprises: a pump body having the piston chamber; and a pump head, connected to the pump body and having the liquid inlet and the liquid outlet; The pump body has a first fixing hole, the motor housing has a second fixing hole, and the piston pump further includes a fixing member, which is inserted into the first fixing hole and the second fixing hole.

7. The piston pump according to claim 6, characterized in that The outer wall surface of the motor housing is provided with an avoidance groove, which extends along the axial direction of the motor. The second fixing hole is located on the extension path of the avoidance groove, and the avoidance groove is used to avoid the fixing piece inserted in the second fixing hole.

8. The piston pump according to claim 6, characterized in that One of the pump body and the motor is provided with a limiting protrusion, and the other of the pump body and the motor is provided with a limiting hole, and the limiting protrusion is inserted into the limiting hole.

9. The piston pump according to claim 8, characterized in that The motor housing further has a groove, which is arranged on the cavity wall of the motor cavity and communicates with the motor cavity; The motor is provided with a connecting ear, and the connecting ear is clamped in the groove; Wherein, the connecting ear has the limiting hole, and the pump assembly is provided with the limiting protrusion.

10. The piston pump according to claim 9, characterized in that There is a gap between at least a portion of the limiting protrusion and the hole wall of the limiting hole.

11. The piston pump according to claim 9, characterized in that The motor housing is provided with a supporting ear, which is arranged opposite to the connecting ear. The supporting ear has the second fixing hole, and the connecting ear has a third fixing hole. The third fixing hole and the limiting hole are arranged at intervals, and the fixing member is sequentially passed through the second fixing hole, the third fixing hole and the first fixing hole.

12. The piston pump according to claim 6, characterized in that The inner peripheral wall of the motor cavity is provided with an anti-idiot groove; the pump body is provided with an anti-idiot portion adapted to the anti-idiot groove, and the anti-idiot portion is embedded in the anti-idiot groove.

13. The piston pump according to claim 6, characterized in that The pump body has a mounting cavity and a through hole both of which are connected to the piston cavity, and the through hole is provided on the bottom wall of the mounting cavity. The drive assembly further includes: a shaft sleeve, sleeved on the motor shaft of the motor, rotatably disposed in the mounting cavity, a driving portion eccentrically disposed on a side of the shaft sleeve away from the motor, the driving portion passing through the through hole and connected to the piston; Wherein, a convex ring is provided on the outer peripheral wall of the sleeve, and the diameter of the convex ring is larger than the diameter of the through hole, so that the lower end surface of the convex ring abuts against the bottom wall of the installation cavity.

14. A clothes processing device, characterized in that: include: A main body, comprising a shell and a barrel assembly disposed in the shell; a laundry treatment agent box having a liquid storage cavity and disposed on the housing; as well as The piston pump according to any one of claims 1 to 13, wherein the piston pump is connected to the laundry treatment agent box, the liquid inlet is connected to the liquid storage chamber, and the liquid outlet is connected to the barrel assembly.

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