CN113907681A

CN113907681A - Spray arm assembly and dish washing machine with same

Info

Publication number: CN113907681A
Application number: CN202111122890.XA
Authority: CN
Inventors: 张婧宜; 费望春; 蔡思琦
Original assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2018-08-28
Filing date: 2019-03-27
Publication date: 2022-01-11
Anticipated expiration: 2039-03-27
Also published as: CN113907681B; CN109875476A; CN109875476B

Abstract

The invention relates to a spray arm assembly for a dishwasher, the spray arm assembly comprising: a spray arm seat; the supporting seat is connected with the spray arm seat; the first spray arm is sleeved on the support seat and communicated with the spray arm seat; a first bearing including a first slip ring and a second slip ring slidable relative to each other; the first spray arm is provided with a first water inlet and a first guide pipe located on the periphery of the first water inlet, the outer wall of the first guide pipe is sleeved with a first sliding ring, the inner wall of the supporting seat is arranged on a second sliding ring, the second sliding ring is located outside the first sliding ring, a first annular bulge is arranged on the inner wall of the first sliding ring, a first annular groove is formed in the outer wall of the first guide pipe, and/or a second annular bulge is arranged on the outer wall of the second sliding ring, a second annular groove is formed in the inner wall of the supporting seat, and the first spray arm can rotate relative to the spray arm seat through the first sliding ring and the second sliding ring. According to the spray arm assembly, the first spray arm is connected with the spray arm base through the first bearing, so that the friction resistance is reduced.

Description

Spray arm assembly and dish washing machine with same

The application is a divisional application of an invention patent application with application number 201910240001.6 and invented name 'spray arm assembly and dishwasher with the same' applied on 27/03/2019.

Technical Field

The invention relates to the technical field of kitchen supplies, in particular to a spray arm assembly and a dish washing machine with the spray arm assembly.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

With the improvement of living standard of materials, dish washing machines capable of freeing hands are gradually becoming standard for quality life. Compared with the traditional hand washing, the dish washing machine has the advantages of cleaning, sterilizing, saving water and labor and the like. The household dish washer generally adopts a spray type washing mode, under the driving of a washing pump, water flow sprays and washes the surface of tableware through a rotating spray arm, and the washing effect of the spray type washing mode is closely related to the design of the spray arm. The most common existing dish-washing machines adopt a single-layer spray arm structure and a double-layer spray arm structure: the single-layer spray arm structure comprises a spray arm and a spray arm seat, the spray arm and the spray arm seat are connected through a buckle, and a certain gap is formed between the spray arm and the spray arm seat, so that the spray arm can smoothly rotate on the spray arm seat; double-deck spray arm structure includes spray arm, lower spray arm and spray arm seat, is connected through the buckle between lower spray arm and the spray arm seat, goes up spray arm and is connected through the buckle equally between the spray arm down, and upper and lower spray arm antiport among the double-deck spray arm structure, and jet angle is not single, and the forward and reverse rivers that spray can produce the power of kneading to effectively improve the cleaning performance.

Although the spray arm structure on the existing dish washer can achieve the purpose of washing the tableware in the dish washer to a certain extent, in the actual use process, the following problems exist:

1) the spray arm and the spray arm seat are connected through the buckle in the conventional single-layer spray arm structure, and a certain gap exists between the spray arm and the spray arm seat due to the fact that the spray arm and the spray arm seat need to rotate relatively, so that a part of water flow leaks through the gap, and in addition, sliding friction resistance is large when the spray arm and the spray arm seat move relatively.

2) Lower spray arm in the double-deck spray arm structure all adopts the buckle to be connected with spray arm seat, upward spray arm and down between the spray arm, leads to double-deck spray arm pressure release serious, and frictional resistance when rotating is great to greatly reduced double-deck spray arm structure to the washing effect of tableware in the dish washer.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, the invention provides the spray arm assembly, the first spray arm in the spray arm assembly is connected with the spray arm seat through the first bearing, so that the friction resistance of the first spray arm relative to the spray arm seat during rotation is reduced, and the rotation smoothness of the first spray arm and the washing effect of the spray arm assembly are improved.

In order to achieve the above object, a first aspect of the present invention provides a spray arm assembly for a dishwasher, the spray arm assembly comprising a spray arm socket; the supporting seat is connected with the spray arm seat; the first spray arm is sleeved on the supporting seat and communicated with the spray arm seat; the first bearing comprises a first sliding ring and a second sliding ring which can slide relative to each other, the first sliding ring is arranged on the first spray arm, the second sliding ring is arranged on the supporting seat, the first spray arm can rotate relative to the spray arm seat through the first sliding ring and the second sliding ring, the first spray arm is provided with a first water inlet, the first spray arm is provided with a first flow guide pipe at the periphery of the first water inlet, the second sliding ring is arranged outside the first sliding ring and is arranged on the inner wall of the supporting seat, the first sliding ring is sleeved on the outer wall of the first flow guide pipe, the inner wall of the first sliding ring is provided with a first annular bulge, the outer wall of the first flow guide pipe is provided with a first annular groove matched with the first annular bulge, and/or the outer wall of the second sliding ring is provided with a second annular bulge, and the inner wall of the supporting seat is provided with a second annular groove matched with the second annular bulge.

According to the spray arm assembly, the first spray arm in the spray arm assembly is connected with the spray arm seat through the first bearing, so that the friction resistance of the first spray arm in rotation relative to the spray arm seat is reduced, and the rotation smoothness of the first spray arm and the washing effect of the spray arm assembly are improved.

In addition, the spray arm assembly according to the present invention may further have the following additional technical features:

according to one embodiment of the invention, a water outlet is arranged on the spray arm seat, a communicating pipe is also arranged between the water outlet and the supporting seat on the spray arm seat, and the supporting seat is sleeved on the communicating pipe.

According to an embodiment of the invention, the supporting seat is detachably sleeved on the spray arm seat, and the supporting seat comprises a base sleeved on the spray arm seat and a limiting ring arranged on the periphery of the base.

According to one embodiment of the invention, a first annular groove is arranged on the base at a position in the limiting ring, a first notch communicated with the first annular groove is arranged on the pipe wall of the limiting ring, and a gap is arranged between the first limiting rib and the first notch.

According to one embodiment of the invention, the bottom of the base is provided with a first notch, the communicating pipe is provided with a second notch corresponding to the first notch, and the clamping slag between the communicating pipe and the base can flow out through the first notch and the second notch.

According to one embodiment of the invention, the first spray arm is provided with a first limiting rib corresponding to the support seat on the periphery of the first water inlet, and when the first spray arm is installed on the spray arm seat, the first limiting rib is matched with the first notch on the limiting ring.

According to one embodiment of the invention, the spray arm assembly further comprises a second spray arm which is pivotally connected to the first spray arm by a second bearing, and a second water inlet on the second spray arm is in communication with the first water outlet of the first spray arm.

According to one embodiment of the invention, the first spray arm is provided with a first mounting ring and a second mounting ring which are distributed at intervals on the periphery of the first water outlet, the second spray arm is provided with a second flow guide pipe on the periphery of the second water inlet, the second flow guide pipe is sleeved on the outer wall of the first mounting ring, and the second bearing is mounted between the second flow guide pipe and the second mounting ring.

According to one embodiment of the invention, the second bearing comprises a third sliding ring and a fourth sliding ring sliding relative to each other, the inner wall of the third sliding ring being provided with a third annular projection, the outer wall of the second duct being provided with a third annular recess cooperating with the third annular projection, and/or the outer wall of the fourth sliding ring being provided with a fourth annular projection, the inner wall of the second mounting ring being provided with a fourth annular recess cooperating with the fourth annular projection.

According to one embodiment of the invention, a second annular groove is arranged between the first mounting ring and the second mounting ring, and a second gap communicated with the second annular groove is arranged on the second mounting ring.

According to one embodiment of the invention, the second spray arm is provided with a second limiting rib corresponding to the second mounting ring at the periphery of the second water inlet, and when the second spray arm is mounted on the second spray arm, the second limiting rib is matched with the second notch on the second mounting ring.

A second aspect of the invention provides a dishwasher having a washing chamber and a spray arm assembly according to the first aspect of the invention disposed within the washing chamber.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

FIG. 1 is a schematic structural view of a first spray arm and a spray arm base according to an embodiment of the present invention;

FIG. 2 is a schematic view of a first bearing according to an embodiment of the present invention;

FIG. 3 is a schematic view of a support seat of the spray arm base shown in FIG. 1;

FIG. 4 is a partial cross-sectional view of the mounting structure of the first spray arm and the spray arm base shown in FIG. 1;

fig. 5 is a schematic structural view of a first spray arm and a second spray arm according to an embodiment of the invention;

FIG. 6 is a schematic view of the first spray arm shown in FIG. 5;

FIG. 7 is a schematic view of the second spray arm shown in FIG. 5;

FIG. 8 is a partial cross-sectional view of the mounting structure of the first and second spray arms of FIG. 5;

FIG. 9 is a schematic structural view of a spray arm assembly according to an embodiment of the present invention;

FIG. 10 is a partial cross-sectional view of the spray arm assembly of FIG. 9;

FIG. 11 is a partial cross-sectional view of a mounting structure in the spray arm assembly of FIG. 9;

wherein the reference numbers are as follows:

10. a spray arm seat; 11. a water outlet; 12. a supporting seat; 121. a base; 122. a limiting ring; 123. a first annular groove; 124. a first gap; 13. a communicating pipe; 20. a first spray arm; 21. a first water inlet; 22. a first draft tube; 23. a first limiting rib; 24. a first water outlet; 25. a first mounting ring; 251. a second annular groove; 26. a second mounting ring; 261. a second gap; 30. a second spray arm; 31. a second water inlet; 32. a second draft tube; 33. a second limiting rib; 100. a first bearing; 110. a first slip ring; 111. a first annular projection; 120. a second slip ring; 121. a second annular projection; 200. a second bearing; 210. a third slip ring; 220. and a fourth slip ring.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art. It should be noted that the application of the spray arm assembly to the dishwasher is only a preferred embodiment of the present invention, and is not a limitation to the application scope of the spray arm assembly, for example, the spray arm assembly of the present invention is applied to other washing apparatuses, and such an adjustment belongs to the protection scope of the spray arm assembly of the present invention.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

For convenience of description, spatially relative terms, such as "upper", "outer", "peripheral", "inner", and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. This spatially relative relationship is intended to encompass different orientations of the mechanism in use or operation in addition to the orientation depicted in the figures. For example, if the mechanism in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The mechanism may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1 to 4, according to an embodiment of the present invention, a first aspect of the present invention provides a spray arm assembly for a dishwasher, the spray arm assembly including a spray arm base 10; the supporting seat 12, the supporting seat 12 is connected to the spray arm seat 10; the first spray arm 20, the first spray arm 20 is set on the supporting seat 12 and is communicated with the spray arm seat 10; the first bearing 100, the first bearing 100 includes a first sliding ring 110 and a second sliding ring 120 that can slide relative to each other, the first sliding ring 110 is disposed on the first spray arm 20, the second sliding ring 120 is disposed on the support base 12, and the first spray arm 20 can rotate relative to the spray arm base 10 through the first sliding ring 110 and the second sliding ring 120.

According to the spray arm assembly of the invention, the first spray arm 20 and the spray arm seat 10 in the spray arm assembly are connected through the support seat 12 and the first bearing 100, thereby reducing the friction resistance when the first spray arm 20 rotates relative to the spray arm seat 10, and improving the rotation smoothness of the first spray arm 20 and the washing effect of the spray arm assembly. Specifically, the spray arm subassembly of this embodiment is located the washing intracavity of dish washer, the bottom in washing chamber can be located to the spray arm subassembly, can also locate the top in washing chamber, spray arm seat 10 link up with first spray arm 20 and provide washing liquid in to first spray arm 20, be provided with a plurality of nozzles on the first spray arm 20, the washing liquid that flows into in first spray arm 20 through spray arm seat 10 can be through a plurality of nozzle blowout, spout to the tableware in the dish washer from a plurality of nozzle blowout's washing liquid, thereby reach the purpose of the tableware in the dish washer. Further, in order to increase the coverage area of the washing liquid sprayed by the first spray arm 20, the first spray arm 20 in the spray arm assembly of the present embodiment can rotate relative to the spray arm base 10, and the first spray arm 20 sprays the washing liquid to the dishes in the washing chamber while rotating, thereby increasing the washing area of the first spray arm 20. Preferably, in order to reduce the frictional resistance when the first spray arm 20 rotates relative to the spray arm base 10, the first spray arm 20 and the spray arm base 10 are connected through the support base 12 and the first bearing 100 in the present embodiment, specifically, the first sliding ring 110 and the second sliding ring 120 on the first bearing 100 are respectively disposed on the support base 12 and the first spray arm 20, so as to transfer the rotational friction between the first spray arm 20 and the spray arm base 10 to the rotational friction between the first sliding ring 110 and the second sliding ring 120. Preferably, the first bearing 100 may be a ball bearing, and balls are disposed between the first and

second slip rings

110 and 120. Preferably, the first bearing 100 may also be a needle bearing, and a needle is disposed between the first sliding ring 110 and the second sliding ring 120. Preferably, the first bearing 100 may also be a sliding bearing, and an oil film is disposed between the first sliding ring 110 and the second sliding ring 120. Preferably, the first sliding ring 110 and the second sliding ring 120 of the first bearing 100 of the present embodiment are not limited to be distributed horizontally, and the first sliding ring 110 and the second sliding ring 120 may also be distributed vertically, for example, the first sliding ring 110 is disposed on the upper surface of the second sliding ring 120, and balls, needles, oil films, or the like are disposed between the first sliding ring 110 and the second sliding ring 120. It should be noted that, as can be understood by those skilled in the art, the first bearing 100 in the present embodiment is not limited to the above four bearings, and other bearings capable of meeting the requirements of the spray arm assembly of the present embodiment also belong to the protection scope of the first bearing 100 of the present embodiment, and are not described herein again.

Referring to fig. 1 to 4, according to an embodiment of the present invention, the first spray arm 20 is provided with a first water inlet 21, the first spray arm 20 is provided with a first flow guide pipe 22 around the first water inlet 21, and the first slip ring 110 is sleeved on the first flow guide pipe 22.

In the embodiment, the first sliding ring 110 and the second sliding ring 120 are respectively sleeved on the first guide pipe 22 and the support base 12, and the support base 12 and the first guide pipe 22 provide an installation space for the first bearing 100, so that the installation applicability of the first bearing 100 is improved. Preferably, the first sliding ring 110 may be further sleeved on an outer wall of the supporting base 12, and the second sliding ring 120 may be sleeved on an inner wall of the first flow guide tube 22, at this time, the supporting base 12 is inserted into the first flow guide tube 22 through the first bearing 100. Preferably, the second sliding ring 120 is sleeved on the inner wall of the support base 12, and correspondingly, the first sliding ring 110 is sleeved on the outer wall of the first flow guide tube 22, at this time, the first flow guide tube 22 is inserted into the support base 12 through the first bearing 100, and the embodiment of inserting the first flow guide tube 22 into the support base 12 through the first bearing 100 will be described in detail below. Preferably, the first sliding ring 110 may be further sleeved on an end of the support base 12, the second sliding ring 120 may be sleeved on an end of the first guide pipe 22, and the second sliding ring 120 presses on an upper surface of the first sliding ring 110, in which case the first guide pipe 22 presses on the support base 12 through the first bearing 100.

Referring to fig. 1 to 4, according to an embodiment of the present invention, the second sliding ring 120 is disposed outside the first sliding ring 110, the second sliding ring 120 is disposed on the inner wall of the supporting base 12, and the first sliding ring 110 is sleeved on the outer wall of the first flow guiding pipe 22.

In the embodiment, the outer wall of the first nozzle 22 is provided with a section of annular mounting surface, the first sliding ring 110 is mounted on the annular mounting surface of the first nozzle 22 and is in interference fit with the first nozzle 22, the inner wall of the support base 12 is provided with a section of annular mounting surface, the second sliding ring 120 is mounted on the annular mounting surface of the support base 12 and is in interference fit with the support base 12, when the first nozzle arm 20 rotates relative to the nozzle arm base 10, the first sliding ring 110 rotates relative to the second sliding ring 120, so that the rotational friction between the first nozzle arm 20 and the nozzle arm base 10 is transferred to the friction between the first sliding ring 110 and the second sliding ring 120, thereby reducing the rotational friction force when the first nozzle arm 20 rotates relative to the nozzle arm base 10, and improving the rotational smoothness of the first nozzle arm 20. The first spray arm 20 of the present embodiment is assembled to the spray arm base 10 through the first bearing 100, which not only reduces the frictional resistance when the first spray arm 20 rotates relative to the spray arm base 10, but also improves the sealing performance between the first spray arm 20 and the spray arm base 10, and reduces the leakage of the cleaning solution from the gap between the spray arm base 10 and the first spray arm 20.

With continued reference to fig. 1 to 4, according to an embodiment of the present invention, the inner wall of the first sliding ring 110 is provided with a first annular protrusion 111, the outer wall of the first flow guiding pipe 22 is provided with a first annular groove (not shown) matching with the first annular protrusion 111, and/or the outer wall of the second sliding ring 120 is provided with a second annular protrusion 121, and the inner wall of the supporting base 12 is provided with a second annular groove (not shown) matching with the second annular protrusion 121.

In the embodiment, the first annular protrusion 111 and the second annular protrusion 121 have certain flexibility, for example, the first annular protrusion 111 and the second annular protrusion 121 may be made of rubber or the like, so that the first annular protrusion 111 may be pressed into the first annular groove of the first fluid guide tube 22, and the second annular protrusion 121 may be pressed into the second annular groove of the support base 12, thereby improving the sealing performance and the connection stability between the first bearing 100 and the first fluid guide tube 22 and the support base 12. It should be noted that, in this embodiment, only the first annular protrusion 111 may be disposed on the first sliding ring 110, or only the second annular protrusion 121 may be disposed on the second sliding ring 120, which may also improve the sealing performance and the connection stability between the first bearing 100 and the first flow guide 22 and the support base 12.

With reference to fig. 1 to 4, according to an embodiment of the present invention, a water outlet 11 is disposed on the spray arm seat 10, a communication pipe 13 is disposed between the water outlet 11 and the support seat 12 on the spray arm seat 10, and the support seat 12 is sleeved on the communication pipe 13.

In this embodiment, the connection tube 13 is disposed around the water outlet 11 of the spray arm seat 10, and the support seat 12 is disposed on the connection tube 13 for assembling the first spray arm 20. Preferably, the first guide pipe 22 is inserted into the support base 12, and then can be further inserted into the communicating pipe 13 of the spray arm base 10, and further, a sealing member is further disposed between an outer wall of the first guide pipe 22 and an inner wall of the communicating pipe 13, so that the connection sealing performance between the spray arm base 10 and the first spray arm 20 is improved, and the outflow of the cleaning solution through a gap between the first guide pipe 22 and the spray arm base 10 is reduced.

With reference to fig. 3 and 4, according to an embodiment of the present invention, the supporting base 12 is detachably sleeved on the communicating pipe 13, and the supporting base 12 includes a base 121 sleeved on the communicating pipe 13 and a limiting ring 122 disposed around the base 121.

In this embodiment, a circular mounting hole is formed in the base 121, the base 121 is mounted on the communication pipe 13 of the spray arm socket 10 through the circular mounting hole, a limiting ring 122 is disposed around the upper surface of the base 121, and when the first spray arm 20 is mounted on the spray arm socket 10, the first flow guide pipe 22 on the first spray arm 20 is mounted in the limiting ring 122 of the support base 12 through the first bearing 100. Further, the lower surface periphery of base 121 is provided with interval distribution's fixture block structure and buckle structure, the outer wall of communicating pipe 13 is provided with the interval distribution's that matches with the fixture block structure draw-in groove structure, supporting seat 12 passes through fixture block and draw-in groove joint in the communicating pipe 13 outer wall that spouts arm seat 10, reduce this and first spout arm 20 and rotate the relative arm seat 10 pivoted phenomenon that spouts of appearance of in-process supporting seat 12, and further, the outer wall of communicating pipe 13 is provided with the stairstepping draw-in groove with the interval distribution that buckle structure matches, supporting seat 12 passes through buckle structure and stairstepping draw-in groove joint in the outer wall of communicating pipe 13, reduce this and first spout arm 20 and rotate the phenomenon that drops from communicating pipe 13 in-process supporting seat 12.

With continued reference to fig. 3, according to an embodiment of the present invention, a first annular groove 123 is formed on the base 121 at a position inside the position-limiting ring 122, and a first gap 124 communicated with the first annular groove 123 is formed on the tube wall of the position-limiting ring 122.

In this embodiment, the first bearing 100 is installed on the base 121 and located in the limiting ring 122 of the base 121, impurities such as clamping slag inevitably occur in the first bearing 100 during use, the impurities increase the friction force of the first bearing 100 in the first bearing 100, the first bearing 100 may be worn by long-term use, which may cause damage and failure of the first bearing 100, in order to reduce the impurities such as the slag in the first bearing 100 and to reduce the influence of the impurities such as the slag on the first bearing 100, the first annular groove 123 is provided on the base 121 at a position inside the limit ring 122, the first annular groove 123 provides a circulation space for the slag in the first bearing 100, when the slag in the first bearing 100 flows out of the first bearing 100, the slag may enter the first annular groove 123, meanwhile, the first annular groove 123 forms a stepped surface on the base 121, thereby improving the installation sealability of the first bearing 100. Further, in this embodiment, the tube wall of the limiting ring 122 is provided with a first notch 124 communicated with the first annular groove 123, so that the slag in the first annular groove 123 can flow out of the base 121 through the first notch 124, and the phenomenon that the slag in the first annular groove 123 enters the first bearing 100 again is reduced. Specifically, when the spray arm assembly is operated by passing water, the first sliding ring 110 and the second sliding ring 120 of the first bearing 100 can slightly shake up and down, and the first spray arm 20 enables the first sliding ring 110 to move upwards relative to the second sliding ring 120 under the reaction force of water flow, so that small clamping slag in the first bearing 100 can flow into the first annular groove 123 through the gap between the lower surface of the first bearing 100 and the base 121 along with the water flow and flow out from the first notch 124 on the limit ring 122 communicated with the first annular groove 123. Further, the bottom of the base 121 is provided with a first notch (not shown in the figure), and the communicating pipe 13 is provided with a second notch (not shown in the figure) corresponding to the first notch, so that the slag stuck between the communicating pipe 13 and the base 121 can flow out through the first notch and the second notch, the problem of slag stuck accumulation between the communicating pipe 12 and the base 121 can be effectively solved, and the slag stuck between the communicating pipe 12 and the base 121 can be conveniently cleaned.

With continuing reference to fig. 1 and 3, according to an embodiment of the present invention, the first spray arm 20 is provided with a first limiting rib 23 corresponding to the support seat 12 at the periphery of the first water inlet 21, when the first spray arm 20 is mounted on the spray arm seat 10, the first limiting rib 23 is engaged with the first notch 124 of the limiting ring 122, and a gap is formed between the first limiting rib 23 and the first notch 124.

In this embodiment, the first limiting rib 23 has a limiting effect on the limiting ring 122, so that after the first nozzle arm 22 of the first nozzle arm 20 is assembled into the limiting ring 122 of the nozzle arm base 10, the first nozzle arm 20 shakes relative to the nozzle arm base 10. Preferably, the first spacing muscle 23 of this embodiment is four spacing muscle that distribute along the periphery of first water inlet 21, four spacing muscle distribute in four first openings 124 that first water inlet 21 is peripheral, and four spacing muscle extend to first water inlet 21 outer slope, consequently, four spacing muscle still have the guide effect to spacing ring 122, improve the assembly smoothness nature of first spray arm 20 and spray arm seat 10, further, still be provided with the installation boss that is used for installing first bearing 100 between first water inlet 21 and the first spacing muscle 23, the installation boss can reduce the wearing and tearing of first bearing 100 to first spray arm 20. Preferably, the number of the first gaps 124 in the present embodiment may be multiple, such as four, and correspondingly, the number of the first limiting ribs 23 is the same as the number of the first gaps 124. Preferably, when the first position-limiting rib 23 of the present embodiment is fitted into the first notch 124, a gap is formed between the first position-limiting rib 23 and two side walls of the first notch 124, so that the slag can flow out of the gap.

As shown in fig. 5 to 8, according to one embodiment of the present invention, the spray arm assembly further includes a second spray arm 30, the second spray arm 30 is pivotally connected to the first spray arm 20 through a second bearing 200, and a second water inlet 31 (shown in fig. 7) of the second spray arm 30 is communicated with the first water outlet 24 of the first spray arm 20.

The second spray arm 30 of the present embodiment rotates in the opposite direction with respect to the first spray arm 20, the second spray arm 30 and the first spray arm 20 improve the washing effect of the spray arm assembly through the forward and reverse spraying, and further, the second spray arm 30 is connected to the first spray arm 20 through the second bearing 200, thereby reducing the frictional resistance when the second spray arm 30 rotates with respect to the first spray arm 20, and improving the smoothness of the rotation of the second spray arm 30 and the washing effect of the spray arm assembly.

With reference to fig. 5 to 8, according to an embodiment of the present invention, the first spray arm 20 is provided with a first mounting ring 25 and a second mounting ring 26 spaced apart from each other around the first water outlet 24, the second spray arm 30 is provided with a second flow guide tube 32 around the second water inlet 31, the second flow guide tube 32 is sleeved on the outer wall of the first mounting ring 25, and the second bearing 200 is installed between the second flow guide tube 32 and the second mounting ring 26.

The first and second mounting rings 25 and 26 of the present embodiment provide a suitable mounting space for the second bearing 200, and at the same time, the first mounting ring 25 can be inserted into the second flow guide tube 32, so that a step seal is formed between the first mounting ring 25 and the second flow guide tube 32, thereby improving the sealing performance between the second spray arm 30 and the first spray arm 20, reducing the shaking phenomenon between the second spray arm 30 and the first spray arm 20, and reducing the phenomenon that the cleaning solution in the first spray arm 20 flows out from the gap between the first spray arm 20 and the second spray arm 30. Preferably, a second annular groove 251 may be further disposed between the first mounting ring 25 and the second mounting ring 26, and a second notch 261 communicated with the second annular groove 251 may be further disposed on the second mounting ring 26, so that the slag in the second bearing 200 may flow out through the second annular groove 251 and the second notch 261, and the phenomenon that the second bearing 200 is worn by the slag in the second bearing 200 is reduced, and meanwhile, the second annular groove 251 forms a stepped surface between the first mounting ring 25 and the second mounting ring 26, thereby improving the mounting sealing performance of the second bearing 200. Preferably, a second limiting rib 33 corresponding to the second mounting ring 26 is arranged on the second spray arm 30 at the periphery of the second water inlet 31, and when the second spray arm 30 is mounted on the second spray arm 30, the second limiting rib 33 is matched with the second notch 261 on the second mounting ring 26. In this embodiment, the second limiting rib 33 has a limiting effect on the second mounting ring 26, and after the second flow guide pipe 32 on the second spray arm 30 is assembled to the second spray arm 30, the second spray arm 30 shakes relative to the first spray arm 20. Preferably, the second spacing muscle 33 of this embodiment is four spacing muscle that distribute along the periphery of second water inlet 31, and four spacing muscle distribute in the periphery of second water inlet 31 to extend to second water inlet 31 extroversion, therefore, four spacing muscle still have the guide effect to second collar 26, improve the assembly smoothness nature of second spray arm 30 and first spray arm 20, further, still be provided with the installation boss that is used for installing second bearing 200 between second water inlet 31 and the spacing muscle 33 of second, the installation boss can reduce the wearing and tearing of second bearing 200 to second spray arm 30. Further, the second bearing 200 includes a third sliding ring 210 and a fourth sliding ring 220 (as shown in fig. 8) sleeved outside the third sliding ring 210, an inner wall of the third sliding ring 210 is provided with a third annular protrusion, an outer wall of the second flow guide pipe 32 is provided with a third annular groove matched with the third annular protrusion, and/or an outer wall of the fourth sliding ring 220 is provided with a fourth annular protrusion, and an inner wall of the second mounting ring 26 is provided with a fourth annular groove matched with the fourth annular protrusion, so as to improve the sealing performance and the connection stability between the second bearing 200 and the second flow guide pipe 32 and the second mounting ring 26.

As shown in fig. 9 to 11, a second aspect of the present invention provides a dishwasher having a washing chamber and a spray arm assembly according to the first aspect of the present invention disposed in the washing chamber.

According to the dishwasher of the embodiment, the spray arm assembly can be arranged at the bottom of the washing chamber in the dishwasher, and can also be arranged at the top of the washing chamber, the spray arm base 10 is communicated with the first spray arm 20 for providing the washing liquid into the first spray arm 20, the first spray arm 20 is provided with a plurality of nozzles, the washing liquid flowing into the first spray arm 20 through the spray arm base 10 can be sprayed through a plurality of nozzles, the washing liquid sprayed from the plurality of nozzles is sprayed onto the dishes in the dishwasher, thereby achieving the purpose of washing the tableware in the dish washer, the first spray arm 20 is communicated with the second spray arm 30 for providing the washing liquid into the second spray arm 30, the second spray arm 30 is provided with a plurality of nozzles, the washing liquid flowing into the second spray arm 30 through the first spray arm 20 can be sprayed out through a plurality of nozzles, and the washing liquid sprayed out from the plurality of nozzles is sprayed to the tableware in the dish washer, so that the aim of washing the tableware in the dish washer is fulfilled. Further, the second spray arm 30 rotates in the opposite direction relative to the first spray arm 20, and the second spray arm 30 and the first spray arm 20 improve the washing effect of the spray arm assembly through forward and reverse spraying. Further, the first spray arm 20 is connected with the spray arm base 10 through the first bearing 100, and the second spray arm 30 is connected with the first spray arm 20 through the second bearing 200, so that the rotation smoothness of the first spray arm 20 and the second spray arm 30 is improved, the assembly sealing performance of the spray arm assembly is improved, the phenomenon that the first bearing 100 and the second bearing 200 are worn due to the fact that the slag in the cleaning solution enters the first bearing 100 and the second bearing 200 is reduced, and the working efficiency and the working stability of the spray arm assembly are improved.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A spray arm assembly for a dishwasher, the spray arm assembly comprising:

a spray arm seat;

the supporting seat is connected to the spray arm seat;

the first spray arm is sleeved on the support seat and communicated with the spray arm seat;

the first bearing comprises a first sliding ring and a second sliding ring which can slide relatively to each other, the first sliding ring is arranged on the first spray arm, the second sliding ring is arranged on the supporting seat, the first spray arm is provided with a first water inlet through the first sliding ring and the second sliding ring can be opposite to the spray arm seat, the first spray arm is provided with a first water inlet, the first spray arm is provided with a first flow guide pipe at the periphery of the first water inlet, the second sliding ring is arranged outside the first sliding ring, the second sliding ring is arranged on the inner wall of the supporting seat, the first sliding ring is sleeved on the outer wall of the first flow guide pipe, the inner wall of the first sliding ring is provided with a first annular bulge matched with the first annular bulge, and/or the outer wall of the second sliding ring is provided with a second annular bulge matched with the first annular groove, and/or the inner wall of the supporting seat is provided with a second annular bulge A second annular groove is disposed to mate with the second annular protrusion.

2. The spray arm assembly of claim 1, wherein the spray arm base is provided with a water outlet, and a communication pipe is further disposed between the water outlet and the support base on the spray arm base, and the support base is sleeved on the communication pipe.

3. The spray arm assembly of claim 2, wherein the support base is detachably sleeved on the communication pipe, and the support base comprises a base sleeved on the communication pipe and a limiting ring arranged on the periphery of the base.

4. The spray arm assembly of claim 3, wherein the base is provided with a first annular groove at a position inside the limit ring, and a first notch communicated with the first annular groove is formed in the pipe wall of the limit ring.

5. The spray arm assembly of claim 4, wherein a first notch is formed in the bottom of the base, a second notch corresponding to the first notch is formed in the communication pipe, and the slag clamped between the communication pipe and the base can flow out through the first notch and the second notch.

6. The spray arm assembly of claim 4, wherein a first limiting rib corresponding to the support seat is arranged on the first spray arm at the periphery of the first water inlet, and when the first spray arm is mounted on the spray arm seat, the first limiting rib is matched with the first notch on the limiting ring, and a gap is formed between the first limiting rib and the first notch.

7. The spray arm assembly of claim 1 further comprising a second spray arm pivotally connected to the first spray arm by a second bearing, and wherein a second water inlet on the second spray arm communicates with a first water outlet of the first spray arm.

8. The spray arm assembly of claim 7, wherein the first spray arm is provided with a first mounting ring and a second mounting ring at intervals at the periphery of the first water outlet, the second spray arm is provided with a second flow guide pipe at the periphery of the second water inlet, the second flow guide pipe is sleeved on the outer wall of the first mounting ring, and the second bearing is mounted between the second flow guide pipe and the second mounting ring.

9. The spray arm assembly of claim 8, wherein the second bearing comprises a third sliding ring and a fourth sliding ring which are slidable relative to each other, wherein the inner wall of the third sliding ring is provided with a third annular protrusion, the outer wall of the second flow guide tube is provided with a third annular groove which is matched with the third annular protrusion, and/or the outer wall of the fourth sliding ring is provided with a fourth annular protrusion, and the inner wall of the second mounting ring is provided with a fourth annular groove which is matched with the fourth annular protrusion.

10. The spray arm assembly of claim 8 wherein a second annular groove is disposed between the first mounting ring and the second mounting ring, and a second gap is disposed in the second mounting ring and extends through the second annular groove.

11. The spray arm assembly of claim 10 wherein said second spray arm is provided with a second retaining rib corresponding to said second mounting ring at a periphery of said second inlet, said second retaining rib engaging said second notch in said second mounting ring when said second spray arm is mounted to said second spray arm.

12. A dishwasher, characterized in that the dishwasher has a washing chamber and a spray arm assembly according to any one of claims 1 to 11 provided in the washing chamber.