CN217659708U - Spray arm assembly, spray arm device and dish washing machine - Google Patents

Abstract

The utility model discloses a spray arm subassembly, spray arm device and dish washer, wherein, the spray arm subassembly, a mount pad cooperation for use with the dish washer, the spray arm subassembly includes spray arm and first bearing structure, first bearing structure includes the first roll cooperation portion of arranging in proper order on the direction of arranging of mount pad and spray arm, first rolling element and second roll cooperation portion, first roll cooperation portion is located on the spray arm, second roll cooperation portion is used for connecting the mount pad, first roll cooperation portion can move in second roll cooperation portion through first rolling element, so that the spray arm can be rotatory for the mount pad. The spray arm assembly is matched with the mounting seat of the dish washing machine for use, so that the cleaning effect of the dish washing machine can be improved.

Description

Spray arm assembly, spray arm device and dish washing machine

Technical Field

The utility model relates to a dish washer technical field, in particular to spray arm subassembly, spray arm device and dish washer.

Background

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 enters the spray arm and then is sprayed out through the spray holes in the spray arm, the spray arm is driven to rotate, and the rotating spray arm sprays to wash out the surface of tableware so as to remove stains on the surface of the tableware. Among them, the structure of the spray arm is closely related to the washing effect of the dishwasher, and is always the focus of research in the field of the dishwasher.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims to provide a spray arm component, which aims to improve the cleaning effect of a dish washing machine.

In order to achieve the above object, the present invention provides a spray arm assembly for cooperating with a mounting seat of a dishwasher, including:

a spray arm; and

first bearing structure, include at the mount pad with first roll cooperation portion, first rolling element and the second roll cooperation portion that arrange in proper order on the direction of arrangement of spray arm, first roll cooperation portion is located on the spray arm, second roll cooperation portion is used for connecting the mount pad, first roll cooperation portion can pass through first rolling element is in second roll cooperation portion is last to move, so that the spray arm can for the mount pad is rotatory.

In one embodiment, the spray arm further comprises a first connecting structure for connecting the first rolling matching part with the spray arm and a second connecting structure for connecting the second rolling matching part with the mounting seat.

In an embodiment, the second rolling-fit portion is closer to the spray arm than the first rolling-fit portion, the first connecting structure is pressed on a side of the first rolling-fit portion away from the spray arm and connected with the spray arm, and the second connecting structure is pressed on a side of the second rolling-fit portion close to the spray arm and connected with the mounting base.

In one embodiment, the first connecting structure comprises a first tubular part and a first annular part sleeved on the first tubular part; the second connecting structure comprises a second tubular part and a second annular part arranged in the second tubular part;

the first bearing structure and the first annular part are both located in the second tubular part, the first rolling matching part is closer to the first annular part relative to the second rolling matching part, the first tubular part is inserted into the through hole of the second annular part and connected with the spray arm, one end of the second tubular part, which is close to the first annular part, is connected with the first mounting seat, so that the first annular part is pressed on the first rolling matching part, and the second annular part is pressed on the second rolling matching part.

In an embodiment, the first bearing structure further comprises a first connecting portion integrally formed with the first rolling fitting portion and a second connecting portion integrally formed with the second rolling fitting portion;

the first rolling matching part is connected with the spray arm through the first connecting part, and the second rolling matching part is connected with the mounting seat through the second connecting part.

In one embodiment, the first connecting portion is a first tubular portion, and the first rolling fit portion is sleeved on the first annular portion;

the second connecting part is a second tubular part, and the second rolling matching part is arranged in the second tubular part;

the first rolling body and the first rolling matching part are both positioned in the second tubular part, the first tubular part is inserted into the through hole of the second rolling matching part and is connected with the spray arm, one end, close to the first rolling matching part, of the second tubular part is connected with the mounting seat, so that the first rolling matching part is pressed on one side of the first rolling body, and the second rolling matching part is pressed on the other side of the first rolling body.

In an embodiment, the spray arm has a first communication pipe, the second tubular portion and the first rolling element are both sleeved outside the first communication pipe, and the first tubular portion is inserted into the first communication pipe.

In an embodiment, the mounting seat has a second communication pipe inserted into the second tubular portion, and/or a third communication pipe inserted into the first tubular portion.

In an embodiment, one end of the first communication pipe, which is far away from the mounting seat, is provided with a first step structure, and the inner wall of the first tubular part is provided with a second step structure, and the second step structure is clamped with the first step structure.

In an embodiment, the first rolling engagement portion defines a first annular groove engaged with the first rolling element, and the second rolling engagement portion defines a second annular groove engaged with the first rolling element.

The utility model discloses still provide a spray arm device, include:

the first spray arm assembly comprises the spray arm assembly; and

a water tube assembly having a first mount;

the first spray arm assembly is rotatably connected with the first mounting seat of the water pipe assembly.

In one embodiment, the spray nozzle further comprises a second spray arm assembly;

the first spray arm assembly is provided with a second mounting seat, and the second spray arm assembly is rotatably connected with the second mounting seat of the first spray arm assembly.

In an embodiment, in the arrangement direction of the first spray arm assembly and the second spray arm assembly, the position of the first mounting seat corresponds to the position of the second mounting seat;

or, the connection between the first spray arm assembly and the first mounting seat is taken as a boundary, the spray arm of the first spray arm assembly comprises a first part and a second part which are positioned in the length direction, at least one second spray arm assembly is arranged on the first part and/or the second part, and the number of the second mounting seats is the same as that of the second spray arm assemblies and is arranged in a one-to-one correspondence manner.

In one embodiment, the second spray arm assembly comprises the spray arm assembly;

or the second spray arm assembly comprises a second spray arm and a second bearing structure, and the second spray arm is rotatably connected with the second mounting seat through the second bearing structure.

The utility model also provides a dish washer, including foretell spray arm device.

In the spray arm assembly, the spray arm is connected with the mounting seat through the first bearing structure and can rotate relative to the mounting seat. In the process that the spray arm rotates relative to the mounting seat, the first bearing structure can enable the friction force of relative rotation between the spray arm and the mounting seat to be rolling friction, so that the friction force of relative rotation between the spray arm and the mounting seat can be greatly reduced, the rotation smoothness of the spray arm is obviously improved, and the rotation speed of the spray arm is further improved. Under the same condition (for example, the same initial water pressure, namely the same initial driving force, in the same washing time), the washing effect of the dishwasher can be improved by increasing the rotation speed of the spray arm. In addition, when the spray arm assembly works, the upward sprayed water can generate downward reaction force on the spray arm, and the gravity of the spray arm is downward, so that the spray arm is easy to fall off. The spray arm and the mounting seat are connected through the first bearing structure, so that the axial force can be borne, and the falling probability of the spray arm can be reduced.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic perspective view of a spray arm device according to an embodiment of the present invention;

FIG. 2 is an exploded perspective view of the bearing arrangement of the spray arm assembly of FIG. 1;

FIG. 3 is a schematic cross-sectional view of the spray arm assembly of FIG. 1;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

fig. 5 is a schematic perspective view of a first connection structure and a second connection structure of a spray arm device according to another embodiment of the present invention;

FIG. 6 is a schematic cross-sectional view of the first connection structure and the second connection structure shown in FIG. 5;

fig. 7 is a side view of a spray arm assembly according to another embodiment of the present invention;

FIG. 8 is an exploded perspective view of the spray arm assembly of FIG. 7;

FIG. 9 is an exploded perspective view of the spray arm assembly of FIG. 7 from another perspective;

fig. 10 is a side view of a spray arm assembly according to another embodiment of the present invention;

FIG. 11 is an exploded perspective view of the spray arm assembly of FIG. 10;

FIG. 12 is an exploded perspective view of the spray arm assembly of FIG. 10 from another perspective;

FIG. 13 is a cross-sectional view of the spray arm assembly shown in FIG. 10;

FIG. 14 is an enlarged view of a portion of FIG. 13 at B;

fig. 15 is an exploded perspective view of a spray arm device according to another embodiment of the present invention;

fig. 16 is an exploded perspective view of the spray arm assembly of fig. 15 from another perspective.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Spray arm device	200	Spray arm assembly
300	First mounting seat	210	Spray arm
				220	Bearing structure	222	First rolling fitting part
224	Second rolling engagement part	226	First rolling element
				230	First connecting structure	240	Second connecting structure
232	A first tubular part	234	A first annular part
				242	A second tubular part	244	Second annular part
212	First communicating pipe	310	Second communicating pipe
				320	Third communicating pipe	222a	A first annular groove
224a	Second annular groove	228	First connecting part
				229	Second connecting part	200a	First spray arm assembly
200b	Second spray arm assembly	210a	First spray arm
				210b	Second spray arm	214	First part
216	The second part

The realization, the functional characteristics and the advantages of the utility model are further explained by combining the embodiment and referring to the attached drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if the present invention relates to a directional indication (such as up, down, left, right, front, back, 8230 \8230;, 8230;), the directional indication is only used to explain the relative position relationship between the components in a specific posture, the motion situation, etc., and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is 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 at least one such feature. In addition, if appearing throughout the text, "and/or" is meant to include three juxtaposed aspects, taking "A and/or B" as an example, including either the A aspect, or the B aspect, or both A and B satisfied aspects. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory to each other or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a spray arm device.

In the embodiment of the present invention, as shown in fig. 1, the spray arm device 10 includes a spray arm assembly 200 and a water pipe assembly 300. The spray arm assembly 200 includes a spray arm 210 and a first bearing structure 220, wherein the spray arm 210 is connected with a first mounting seat 302a of the water pipe assembly 300 through the first bearing structure 220 (i.e. the spray arm 210 is connected with the mounting seat 302 of the dishwasher through the first bearing structure 220), and can rotate relative to the first mounting seat 302a. In the process that the spray arm 210 rotates relative to the first mounting seat 302a, the first bearing structure 220 can enable the friction force of the relative rotation between the spray arm 210 and the first mounting seat 302a to be rolling friction, so that the friction force of the relative rotation between the spray arm 210 and the first mounting seat 302a can be greatly reduced, the rotation smoothness of the spray arm 210 is remarkably improved, and the rotation speed of the spray arm 210 is further improved. Under the same condition (e.g., the same initial water pressure, i.e., the same initial driving force, for the same washing time), the washing performance of the dishwasher can be improved by increasing the rotation speed of the spray arm 210.

In the present embodiment, as shown in fig. 1-4, the first bearing structure 220 includes a first rolling engagement part 222, a second rolling engagement part 224, and a first rolling body 226. In the arrangement direction of the first mounting seat 302a and the spray arm 210, that is, in the up-down direction, the first rolling engagement portion 222, the first rolling body 226, and the second rolling engagement portion 224 are arranged in this order. The first rolling engagement portion 222 is provided on the spray arm 210, the second rolling engagement portion 224 is provided on the first mounting seat 302a, and the first rolling engagement portion 222 is movable on the second rolling engagement portion 224 by the first rolling element 226, so that the spray arm 210 can rotate with respect to the first mounting seat 302a.

In the present embodiment, the first rolling engagement portion 222 defines a first annular groove 222a engaged with the first rolling element 226, and the second rolling engagement portion 224 defines a second annular groove 224a engaged with the first rolling element 226. In this way, the first rolling fit part 222 is better facilitated to move on the second rolling fit part 224 through the first rolling body 226.

When the spray arm device 10 is operated, the upward water spray generates a downward reaction force and acts on the spray arm 210, and the gravity of the spray arm 210 is downward, so that the spray arm 210 is easily detached. The first bearing structure 220 connects the nozzle arm 210 and the first mounting seat 302a, so that the axial force can be borne, and the probability of falling off of the nozzle arm 210 can be reduced.

In the present embodiment, the first rolling contact portion 222, the second rolling contact portion 224, and the first rolling element 226 are annular. Specifically, in the present embodiment, the first bearing structure 220 includes a planar thrust bearing. More specifically, in the present embodiment, the first rolling bodies 226 include rolling balls. It is understood that in other embodiments, the first rolling element 226 may also include a needle roller or a cylindrical roller.

In this embodiment, the spray arm assembly 200 further includes a first connecting structure 230 and a second connecting structure 240. The first rolling engagement portion 222 is disposed on the spray arm 210 via the first connection structure 230. The second rolling engagement portion 224 is disposed on the first mounting seat 302a through the second connection structure 240. Such that the spray arm 210 and the first mount 302a are spaced apart by the first coupling structure 230, the second coupling structure 240 and the first bearing structure 220. Providing the first and second connecting structures 230 and 240 separately from the first and second rolling engagement portions 222 and 224 greatly facilitates connection through the first bearing structure 220 via the spray arm 210 and the first mount 302a.

It is understood that in other embodiments, the first connection structure 230 and the second connection structure 240 may be omitted, and in this case, welding or gluing may be used to enable the first rolling-fit portion 222 to be disposed on the spray arm 210 and the second rolling-fit portion 224 to be disposed on the first mounting seat 302a.

In the present embodiment, the second rolling engagement portion 224 is closer to the spray arm 210 than the first rolling engagement portion 222. The first connecting structure 230 presses the first rolling-fit portion 222 on a side away from the spray arm 210, and is connected to the spray arm 210. The second connecting structure 240 presses on a side of the second rolling-fit portion 224 close to the spray arm 210, and is connected to the first mounting seat 300. In the above structure, the first connection structure 230 and the first rolling engagement portion 222 can be connected without providing an additional connection member, and the second connection structure 240 and the second rolling engagement portion 224 can be connected. It is understood that in other embodiments, welding or gluing may be used to connect the first connecting structure 230 and the first rolling-fit portion 222, and the second connecting structure 240 and the second rolling-fit portion 224.

In the present embodiment, the first connecting structure 230 includes a first tubular portion 232 and a first annular portion 234, and the first annular portion 234 is sleeved on the first tubular portion 232. Specifically, in the present embodiment, the first tubular portion 232 and the first annular portion 234 are integrally molded. Thus, the first connection structure 230 is very convenient to fabricate. The second connection structure 240 includes a second tubular portion 242 and a second annular portion 244, the second annular portion 244 being disposed within the second tubular portion 242. Specifically, in the present embodiment, the second tubular portion 242 and the second annular portion 244. In this manner, the second connection structure 240 is very convenient to fabricate.

Wherein the first bearing structure 220 is located within the second tubular portion 242, and the second rolling engagement portion 224 is closer to the second annular portion 244 than the first rolling engagement portion 222. The first annular portion 234 is located within the second tubular portion 242. The first tubular portion 232 is inserted into the through hole of the second annular portion 244, the first tubular portion 232 is connected to the spray arm 210, and one end of the second tubular portion 242 close to the first annular portion 232 is connected to the first mounting seat 302a, so that the first bearing structure 220 is sandwiched between the first annular portion 234 and the second annular portion 244, that is, the first annular portion 234 is pressed on the first rolling-fit portion 222, and the second annular portion 244 is pressed on the second rolling-fit portion 224. As described above, the first rolling engagement portion 222 can be provided on the spray arm 210 by the pressure of the first annular portion 234 acting on the first rolling engagement portion 222, and the second rolling engagement portion 224 can be provided on the first mounting seat 302a by the pressure of the second annular portion 244 acting on the second rolling engagement portion 224.

In the present embodiment, the first annular portion 234 is located at an end of the first tubular portion 232, and the second annular portion 244 is also located at an end of the second tubular portion 242. Thus, the overall height formed by the first connection structure 230 and the second connection structure 240 can be made smaller, and the space can be saved. It is understood that in other embodiments, the first annular portion 234 may be located in the middle of the first tubular portion 232 and the second annular portion 244 may be located in the middle of the second tubular portion 242.

In the present embodiment, the spray arm 210 has a first communication pipe 212. Specifically, in the present embodiment, the spray arm 210 has a spray arm body and a first communication pipe 212 protruding from the spray arm body. More specifically, in the present embodiment, the nozzle arm body is integrally formed with the first communication pipe 212. It is understood that, in other embodiments, the spray arm body and the first communication pipe 212 may be two independent elements, and the spray arm body and the first communication pipe 212 may be fixedly connected by welding, gluing, or the like, or may be detachably connected by screwing, fastening, or the like.

In the present embodiment, the second annular portion 242 is sleeved outside the first communication pipe 212. The first bearing structure 220 is disposed on the first communicating tube 212, the first bearing structure 220 is disposed in the second tubular portion 242, and the second rolling-fit portion 224 is closer to the second annular portion 244 than the first rolling-fit portion 222. The first tubular portion 232 is inserted into the first communication tube 212, and the first annular portion 234, the first bearing structure 220 and the second annular portion 244 are tightly attached in sequence.

The spray arm assembly 200 is used in cooperation with the first mounting seat 302a, a labyrinth seal can be formed at the connecting position of the spray arm 210 and the first mounting seat 302a (the first tubular part 232 and the first communicating pipe 212 are inserted to form a first-stage seal, the first annular part 234, the first bearing structure 220 and the second annular part 244 are sequentially attached to form a second-stage seal, one end, far away from the spray arm 210, of the second tubular part 242 is connected with the first mounting seat 302a to form a third-stage seal), the sealing performance can be remarkably improved, the path of water leaking from the connecting position of the spray arm 210 and the first mounting seat 302a is tortuous, the pressure relief can be effectively reduced, the water pressure is ensured, and meanwhile, the risk that dregs in water enter the first bearing structure 220 and wear the first bearing structure 220 can be reduced. Under the same conditions (e.g., the same washing time, the same initial water pressure), the pressure relief is reduced, and the driving force for driving the spray arm 210 to rotate can be increased, so that the rotation speed of the spray arm 210 can be increased, and the washing effect of the dishwasher can be improved. It is understood that in other embodiments, the first communication pipe 212 may be omitted when the demand for hydraulic pressure is not high.

In this embodiment, the first tubular portion 232 and the first communication pipe 212 may be in an interference fit or a clearance fit. The first tubular portion 232 is interference fitted with the first communication pipe 212. So, can further promote sealing performance, reduce the pressure release, guarantee water pressure. And the connection firmness between the first connection structure 230 and the spray arm 210 can be increased. It is understood that in other embodiments, the first tubular portion 232 and the first communication tube 212 may also be clearance fit. Thus, the assembly is more convenient.

In the present embodiment, an end of the first communication pipe 212 far from the first mounting seat 302a has a first step structure. The inner wall of the first tubular portion 232 has a second stepped configuration that mates with the first stepped configuration. The second stepped structure snaps into engagement with the first stepped structure to form a sealing region 250. The first step structure and the second step structure which are mutually matched are arranged, so that the sealing performance can be further improved, the pressure relief is reduced, and the water pressure is ensured.

In the present embodiment, the first mount 302a (mount 302) has a second communication pipe 310. Specifically, in the present embodiment, the first mounting seat 302a has a mating body and a second communication pipe 310 protruding from the mating body. More specifically, in the present embodiment, the fitting body is integrally formed with the second communication pipe 310. It is understood that, in other embodiments, the mating body and the second communication tube 310 may be two independent elements, and the mating body and the second communication tube 310 may be fixedly connected by welding, gluing, or detachably connected by screwing or snapping.

In the present embodiment, the second tubular portion 242 is inserted into the second communication pipe 310. So, can further promote sealing performance (second tubulose portion 242 is pegged graft for the fourth grade with second communicating pipe 310 and is sealed), reduce the pressure release, guarantee water pressure, can also reduce the dregs entering first bearing structure 220 of aquatic simultaneously, cause the risk of first bearing structure 220 wearing and tearing. Under the same conditions (e.g., the same washing time, the same initial water pressure, i.e., the same initial driving force), the pressure relief is reduced, and the driving force for driving the spray arm 210 to rotate can be increased, so that the rotation speed of the spray arm 210 can be increased, and the washing effect of the dishwasher can be improved. It is understood that, in other embodiments, when the requirement for hydraulic pressure is not high, the second communicating pipe 310 may be omitted.

In this embodiment, the second tubular portion 242 and the second communication pipe 310 may be in an interference fit or a clearance fit. The interference fit between the second tubular portion 242 and the second communicating tube 310 can further improve the sealing performance, reduce the pressure release, ensure the water pressure, and increase the connection firmness between the second connecting structure 240 and the first mounting seat 302a. It is understood that the second tubular portion 242 is clearance-fitted with the second communication pipe 310. Thus, the assembly is more convenient.

In the present embodiment, the second communication pipe 310 is inserted into the second tubular portion 242. So, when water is revealed in the direction from inside to outside, the resistance is bigger, is more difficult to reveal. In other embodiments, the second tubular portion 242 may be inserted into the second communication pipe 310. That is, in the present embodiment, the insertion of the second tubular portion 242 and the second communication pipe 310 includes the above two cases.

In the present embodiment, the first communication pipe 212 is detachably connected to the first tubular portion 232. Specifically, in the present embodiment, as shown in fig. 1, the first communication pipe 212 and the first tubular portion 232 are connected by a snap structure. More specifically, in the present embodiment, the first connecting tube 212 is provided with a first bayonet 212a, the first tubular portion 232 is provided with a first blocking block 232a, and after the first tubular portion 232 is inserted into the first connecting tube 212, the first blocking block 232a is blocked in the first bayonet 212a, so as to detachably connect the first connecting tube 212 and the first tubular portion 232. It is understood that, in other embodiments, the first bayonet 212a may be opened on the first tubular portion 232, and the first blocking block 232a may be disposed on the first communication pipe 212. In this embodiment, the first opening 212a is multiple, and the multiple first openings 212a are arranged at intervals and surround the first communication pipe 212 for a circle. The number of the first latches 232a is the same as that of the first bayonets 212a, and is provided one-to-one.

In the present embodiment, the second communication pipe 310 is detachably connected to the second tubular portion 242. Specifically, as shown in fig. 1, in the present embodiment, the second communication pipe 310 and the second tubular portion 242 are connected by a snap structure. More specifically, in this embodiment, the second connection pipe 310 is provided with a second fastening block 310a, the second tubular portion 242 is provided with a second bayonet 242a, and after the second tubular portion 242 is inserted into the second connection pipe 310, the second bayonet 242a is clamped in the second fastening block 310a, so that the second connection pipe 310 and the second tubular portion 242 can be detachably connected. It is understood that, in other embodiments, the second connection pipe 310 may be provided with the second bayonet 242a, and the second tubular portion 242 may be provided with the second latch 310a. In this embodiment, the second fixture 310a is multiple, and the multiple second fixture 310a are arranged at intervals and surround the second communication pipe 310 for a circle. The number of the second bayonets 242a is the same as the number of the second bayonets 310a, and is provided one-to-one.

In this embodiment, as shown in fig. 1 to 4, the first mounting seat 302a further has a third communication pipe 320, and the third communication pipe 320 is inserted into the first tubular portion 232, that is, in this embodiment, the second communication pipe 310 is located at the periphery of the third communication pipe 320. Therefore, the water in the first mounting seat 302a can flow into the spray arm 210 more conveniently, the sealing performance can be further improved, the pressure relief is reduced, and the water pressure is ensured.

When assembling the spray arm device 10, the second connecting structure 240 is firstly sleeved on the first connecting pipe 212, that is, the second annular portion 244 of the second connecting structure 240 is firstly sleeved on the first connecting pipe 212; then, the first bearing structure 220 is placed in the second connecting structure 240 and sleeved on the first communicating pipe 212; then, the first tubular portion 232 of the first connecting structure 230 is inserted into the first communicating tube 212; then, the second tubular portion 242 of the second connection structure 240 is sleeved on the second connection pipe 310, and the third connection pipe 320 is inserted into the first tubular portion 232; such that the first bearing structure 220 is sandwiched between the first annular portion 234 of the first connection structure 230 and the second annular portion 244 of the second connection structure 240.

In some embodiments, as shown in fig. 5 and 6, the first and second rolling engagement portions 222 and 224 of fig. 1-4 may be omitted and the first rolling body 226 may be disposed between the first and second connection structures 230 and 240, in which case the first bearing structure 220 may be considered to not include the first and second rolling engagement portions 222 and 224 but rather the first rolling body 226. Therefore, the size of the spray arm assembly 200 (the first bearing structure 220) can be reduced, the space can be saved, and the number of parts and the cost can be reduced. In the embodiment shown in fig. 6, the first annular portion 234 has a first annular groove 222a, and the first annular groove 222a is engaged with one side of the first rolling element 226. The second annular portion 244 has a second annular groove 224a, and the second annular groove 224a is engaged with the other side of the first rolling element 226. The first rolling element 226 is movably disposed in the first annular groove 222a and the second annular groove 224a.

In some embodiments, the first and second connection structures 230 and 240 shown in fig. 5 and 6, and the first rolling bodies 226 in fig. 1-4, can be considered to constitute a new first bearing structure 220. Specifically, the first bearing structure 220 includes a first rolling-fit portion 222, a second rolling-fit portion 224, a first rolling body 226, a first connecting portion 228, and a second connecting portion 229. The first connecting portion 228 is connected to the first rolling fitting portion 222. The first roll-fitting portion 222 is connected to the spray arm 210 by a first connection portion 228. The second connection portion 229 is connected to the second rolling-fit portion 224. The second rolling-fit portion 224 is connected to the first mount 302a by a second connecting portion 229. At this time, it can be considered that the first connection structure 230 and the second connection structure 240 in fig. 1 to 4 are omitted from the spray arm assembly 200, so that the size of the spray arm assembly 200 can be reduced, the space can be saved, and the number of parts can be reduced, and the cost can be reduced.

Specifically, in the present embodiment, the first connecting portion 228 is integrally formed with the first rolling fitting portion 222. The second connecting portion 229 is integrally formed with the second rolling engagement portion 224. Thus, the number of parts can be further reduced, and the cost can be reduced.

In this embodiment, the first rolling engagement portion 222 is formed with a first annular groove 222a engaged with one side of the first rolling element 226. The second rolling engagement portion 224 is formed with a second annular groove 224a engaged with the other side of the first rolling element 226. The first rolling element 226 is movably disposed in the first annular groove 222a and the second annular groove 224a.

In the present embodiment, the structure of the first connecting portion 228 in fig. 5 and 6 is the same as that of the first tubular portion 232 in fig. 1-4; the structure of the first rolling engagement portion 222 in fig. 5 and 6 is substantially the same as that of the first annular portion 234 in fig. 1 to 4, except that the first rolling engagement portion 222 in fig. 5 and 6 is provided with a first annular groove 222a, and the first annular portion 234 in fig. 1 to 4 may not be provided with the first annular groove 222a. The structure of the second connection part 229 in fig. 5 and 6 is the same as that of the second tubular part 242 in fig. 1 to 4; the structure of the second rolling engagement portion 224 in fig. 5 and 6 is substantially the same as the structure of the second annular portion 244 in fig. 1 to 4, except that the second rolling engagement portion 224 in fig. 5 and 6 is provided with a second annular groove 224a, and the second annular portion 244 in fig. 1 to 4 may not be provided with the second annular groove 224a.

In the embodiment shown in fig. 5 and 6, the first rolling elements 226 and the first rolling engagement portion 222 are both located within the second tubular portion 242. The first tubular portion 232 is inserted into the through hole of the second rolling fitting portion 224 and connected to the spray arm 210, and one end of the second tubular portion 242 close to the first rolling fitting portion 222 is connected to the first mounting seat, so that the first rolling fitting portion 222 presses on one side of the first rolling element 226, and the second rolling fitting portion 224 presses on the other side of the first rolling element 226.

In the present embodiment, the spray arm apparatus 10 is a single spray arm apparatus, as shown in fig. 1-4. The water pipe assembly 300 is provided at an end thereof with a first mounting seat 302a. The spray arm assembly 200 is coupled to the first mounting block 302a of the water pipe assembly 300. Specifically, in the present embodiment, the third communication pipe 320 communicates with the water pipe 300b of the water pipe assembly 300. The second communication pipe 310 is sleeved outside the third communication pipe 320, and is disposed at an interval from the third communication pipe 320.

As shown in fig. 7-16, the spray arm apparatus 10 is a dual spray arm apparatus or a multi spray arm apparatus. At this time, the spray arm device 10 includes a water pipe assembly 300, a first spray arm assembly 200a, and a second spray arm assembly 200b, wherein the first spray arm assembly 200a includes the spray arm assembly 200 described above. The first spray arm assembly 200a is provided with a second mounting seat 302b, and the second spray arm assembly 200b is rotatably connected with the second mounting seat 302b of the first spray arm assembly 200 a.

In the double-spray-arm device or the multi-spray-arm device, water flow can wash tableware from different angles, and the cleaning effect is improved. However, compared with a single spray arm device, the double spray arm device and the multi-spray arm device are more prone to leakage and pressure relief due to the existence of at least two connection points (the connection point between the first spray arm assembly 200a and the first mounting seat 302a, and the connection point between the first spray arm assembly 200a and the second mounting seat 302 b), and are more difficult to ensure water pressure, so that the application of the double spray arm device and the multi-spray arm device is limited, and the application range is limited. For example, in practical applications, a single spray arm device is usually used as the middle spray arm device of the dishwasher, rather than a double spray arm device and a multi-spray arm device. Because in the dish washer, when adopting from down up the water supply mode who supplies water, well spray arm device's position is high for the position of low spray arm device, and the water pressure of well spray arm device itself is low for the water pressure of low spray arm device, if adopt two spray arm devices or many spray arm device as the well spray arm device of dish washer, the problem that water pressure is low will appear more easily, and then the spray arm rotational speed that leads to well spray arm device is relatively poor, is unfavorable for promoting the washing effect of dish washer.

In this embodiment, the first spray arm assembly 200a includes the spray arm assembly 200, and sealing performance can be significantly improved by forming labyrinth seals at the connection between the first spray arm assembly 200a and the first mounting seat 302a, and when water passes through the connection between the first spray arm assembly 200a and the first mounting seat 302a, a leakage path is tortuous, so that pressure relief can be effectively reduced, and water pressure is guaranteed. Thereby, the double spray arm device and the multi-spray arm device can be used as the middle spray arm device of the dish washing machine.

In some embodiments, as shown in fig. 7-9, the water tube assembly 300 is positioned on one side of the first spray arm assembly 200a and the second spray arm assembly 200b is positioned on the other side of the first spray arm assembly 200a, such that the first and second mounting seats 302a and 302b are positioned on both sides of the first spray arm assembly 200a, respectively. Specifically, in the present embodiment, the position of the first mounting seat 302a corresponds to the position of the second mounting seat 302b in the arrangement direction of the first spray arm assembly 200a and the second spray arm assembly 200b. In this way, the water in the water pipe assembly 300 is more easily introduced into the second spray arm assembly 200b, so that the second spray arm assembly 200b has a greater water pressure. It is understood that, in other embodiments, the position of the first mounting seat 302a and the position of the second mounting seat 302b may be offset in the arrangement direction of the first spray arm assembly 200a and the second spray arm assembly 200b.

In the embodiment of fig. 7-9, the first mounting block 302a is located in the middle of the first spray arm 210a. In this manner, the water pressure at both ends of the first spray arm 210a is made relatively uniform.

In the embodiment shown in fig. 7-9, the first spray arm 210a is substantially the same length as the second spray arm 210 b. In this manner, the water pressure at both ends of the second spray arm 210b is facilitated to be relatively uniform.

In some embodiments, as shown in fig. 10-16, the spray arm 210 of the first spray arm assembly 200a is a first spray arm 210a. The first nozzle arm 210a includes a first portion 214 and a second portion 216 located in the length direction, with the connection between the first mounting seat 302a and the first nozzle arm 210a as a boundary, wherein the first portion 214 and/or the second portion 216 is provided with at least one second nozzle arm assembly 200b, and the number of the second mounting seats 302b is the same as that of the second nozzle arm assemblies 200b, and the second mounting seats 302b are arranged in a one-to-one correspondence. That is, in the present embodiment, the number of the second spray arm assemblies 200b may be one or more (two or more). In this case, the first spray arm 210a may be referred to as a main spray arm, and the second spray arm 210b of the second spray arm assembly 200b may be referred to as a sub spray arm. The second spray arm 210b may also be considered as a satellite for the first spray arm 210a, in which case the intermediate spray arm assembly 10 is a satellite spray arm assembly.

In the embodiment of fig. 10-16, the first mount 302a is located in the middle of the first spray arm 210a. In this manner, the water pressure at both ends of the first spray arm 210a is facilitated to be relatively uniform.

In the embodiment shown in fig. 10-16, the second portion 216 is disposed in correspondence with the water tube assembly 300. In some embodiments, as shown in fig. 10-14, the second spray arm assembly 200b is one and is disposed on the first portion 214. In some embodiments, as shown in fig. 15 and 16, there are two second spray arm assemblies 200b, one second spray arm assembly 200b being disposed on the first portion 214 and the other second spray arm assembly 200b being disposed on the second portion 216.

In some embodiments, as shown in fig. 7-9, the second spray arm assembly 200b includes the spray arm assembly 200, i.e., in the embodiments shown in fig. 7-9, the first spray arm assembly 200a and the second spray arm assembly 200b each include the spray arm assembly 200. The spray arm 210 of the first spray arm assembly 200a is a first spray arm 210a. The first spray arm 210a is connected to the first mounting seat 302a of the hose assembly 300 through the first bearing structure 220 of the first spray arm assembly 200a and can rotate relative to the first mounting seat 302a. The nozzle arm 210 of the second nozzle arm assembly 200b is a second nozzle arm 210b, and the second nozzle arm 210b is connected to the second mounting base 302b of the first nozzle arm assembly 200a through the first bearing structure 220 of the second nozzle arm assembly 200b and can rotate relative to the second mounting base 302b. That is, in the present embodiment, the first nozzle arm 210a and the first mounting seat 302a, and the second nozzle arm 210b and the second mounting seat 302b are connected by the first bearing structure 220. Therefore, in the present embodiment, the first mounting seat 302a and the second mounting seat 302b have the same structure, and each include the second communication pipe 310 and the third communication pipe 320.

In some embodiments, as shown in fig. 10-16, the spray arm assembly 10 includes a first spray arm assembly 200a, a water tube assembly 300, and a second spray arm assembly 200b. The first spray arm assembly 200a includes the spray arm assembly 200 described above. The first spray arm assembly 200a is rotatably coupled to the first mounting block 302a of the waterway assembly 300 via the first bearing structure 220.

The first spray arm assembly 200a is provided with a second mounting block 302b. The second spray arm assembly 200b includes a second spray arm 210b and a second bearing structure 260. The second nozzle arm 210a is coupled to the second mounting block 302b of the first nozzle arm 210a via a second bearing structure 260 and is rotatable with respect to the second mounting block 302b.

The structure of the second bearing structure 260 is different from that of the first bearing structure 220. In the above structure, the first spray arm assembly 200a connects the water pipe assembly 300 and the second spray arm assembly 200b, and the gravity at the connection point of the first spray arm assembly 200a and the water pipe assembly 300 is greater than the gravity at the connection point of the first spray arm assembly 200a and the second spray arm assembly 200b, so that the connection stability between the first spray arm assembly 200a and the water pipe assembly 300 is poor compared to the connection stability between the first spray arm assembly 200a and the second spray arm assembly 200b due to the gravity. Based on the above differences and considering the cost, in the embodiment, the structure of the second bearing structure 260 is different from the structure of the first bearing structure 220.

Specifically, in the present embodiment, the first bearing structure 220 is a plane thrust bearing, and the first spray arm 210a and the first mounting seat 302a are connected by the plane thrust bearing, which is more favorable for reducing the probability of the first spray arm 210a falling off. The second bearing structure 260 is a deep groove ball bearing, and the second spray arm 210a and the first spray arm 210a are connected by the deep groove ball bearing, which is more favorable for reducing the cost of the spray arm device 10.

In this embodiment, the second spray arm 210a is located on a side of the first spray arm 210a adjacent to the first mounting seat 302a. That is, the second spray arm 210a is located above the first spray arm 210a, so that the first spray arm 210a can support the second spray arm 210a, and the probability of falling off of the second spray arm 210a is reduced.

In this embodiment, the second bearing structure 260 includes an inner ring 262, an outer ring 264, and second rolling bodies 266. The inner ring 262 is rotatable relative to the outer ring 264 by means of second rolling bodies 266. The inner ring 262 is disposed on one of the first and second spray arms 210a and 210a, and the outer ring 264 is disposed on the other of the first and second spray arms 210a and 210a. Specifically, in the present embodiment, the inner ring 262 is disposed on the second nozzle arm 210a, and the outer ring 264 is disposed on the first nozzle arm 210a.

In the present embodiment, the second nozzle arm 210a has a third tubular portion 212a. The second mount 302b has a second communication pipe 310. The inner ring 262 is sleeved on the third tubular portion 212a. The second communication pipe 310 is sleeved on the outer ring 264. Therefore, the second bearing structure 260 is convenient to assemble, the sealing performance of the joint of the second spray arm 210a and the first spray arm 210a is improved, and the path of water leaking from the joint of the second spray arm 210a and the first spray arm 210a is tortuous, so that the pressure relief can be effectively reduced, and the water pressure is guaranteed.

In this embodiment, the second mounting base 302b further has a third communication pipe 320. The third communication pipe 320 is inserted in the third tubular portion 212a. In this way, the sealing performance of the connection between the second spray arm 210a and the first spray arm 210a can be further improved.

In this embodiment, as shown in fig. 7 to 16, in operation, the first spray arm 210a of the first spray arm assembly 200a and the second spray arm 210b of the second spray arm assembly 200b are both rotated with respect to the first mounting base 302a, and the rotation direction of at least one of the second spray arms 210b is different from the rotation direction of the first spray arm 210a. Therefore, the water flow can wash the tableware from different angles, and the cleaning effect is improved. It is understood that, in other embodiments, the second spray arm 210b is provided in plurality, and the plurality of second spray arms 210b rotate in the same direction as the first spray arm 210a.

The utility model discloses still provide a dish washer, this dish washer includes spray arm device 10, and this spray arm device 10's concrete structure refers to above-mentioned embodiment, because this dish washer has adopted the whole technical scheme of above-mentioned all embodiments, consequently has all beneficial effects that the technical scheme of above-mentioned embodiment brought at least, and the repeated description is no longer given here.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims (15)

1. A spray arm assembly for use with a mounting cup of a dishwasher, comprising:

a spray arm; and

first bearing structure, include at the mount pad with first roll cooperation portion, first rolling element and the second roll cooperation portion that arrange in proper order on the direction of arrangement of spray arm, first roll cooperation portion is located on the spray arm, second roll cooperation portion is used for connecting the mount pad, first roll cooperation portion can pass through first rolling element is in second roll cooperation portion is last to move, so that the spray arm can for the mount pad is rotatory.

2. The spray arm assembly of claim 1 further comprising a first connecting structure connecting the first rolling engagement portion to the spray arm and a second connecting structure connecting the second rolling engagement portion to the mounting block.

3. The spray arm assembly of claim 2 wherein the second rolling engagement portion is closer to the spray arm than the first rolling engagement portion, the first connection structure is pressed on a side of the first rolling engagement portion away from the spray arm and connected to the spray arm, and the second connection structure is pressed on a side of the second rolling engagement portion near the spray arm and connected to a mounting base.

4. The spray arm assembly of claim 3 wherein the first connection structure includes a first tubular portion and a first annular portion disposed about the first tubular portion; the second connecting structure comprises a second tubular part and a second annular part arranged in the second tubular part;

the first bearing structure and the first annular part are both located in the second tubular part, the first rolling matching part is closer to the first annular part relative to the second rolling matching part, the first tubular part is inserted into the through hole of the second annular part and connected with the spray arm, and one end of the second tubular part, which is close to the first annular part, is connected with the mounting seat, so that the first annular part is pressed on the first rolling matching part, and the second annular part is pressed on the second rolling matching part.

5. The spray arm assembly of claim 1 wherein the first bearing structure further comprises a first connecting portion integrally formed with the first rolling engagement portion and a second connecting portion integrally formed with the second rolling engagement portion;

the first rolling matching part is connected with the spray arm through the first connecting part, and the second rolling matching part is connected with the mounting seat through the second connecting part.

6. The spray arm assembly of claim 5, wherein the first connection portion is a first tubular portion and the first rolling engagement portion is disposed over the first tubular portion;

the second connecting part is a second tubular part, and the second rolling matching part is arranged in the second tubular part;

the first rolling body and the first rolling matching part are both positioned in the second tubular part, the first tubular part is inserted into the through hole of the second rolling matching part and is connected with the spray arm, one end of the second tubular part, which is close to the first rolling matching part, is connected with the mounting seat, so that the first rolling matching part is pressed on one side of the first rolling body, and the second rolling matching part is pressed on the other side of the first rolling body.

7. The spray arm assembly of claim 4 or 6, wherein the spray arm has a first communicating pipe, the second tubular portion and the first rolling element are both sleeved outside the first communicating pipe, and the first tubular portion is inserted into the first communicating pipe.

8. The spray arm assembly of claim 7, wherein the mounting base has a second communication tube plugged with the second tubular portion and/or a third communication tube plugged within the first tubular portion.

9. The spray arm assembly of claim 7, wherein an end of the first communication tube remote from the mounting seat has a first step structure, and an inner wall of the first tubular portion has a second step structure, and the second step structure is engaged with the first step structure.

10. The spray arm assembly of claim 1, wherein the first rolling engagement portion defines a first annular groove for engaging the first rolling element, and the second rolling engagement portion defines a second annular groove for engaging the first rolling element.

11. A spray arm assembly, comprising:

a first spray arm assembly comprising the spray arm assembly of any of claims 1-10; and

a water tube assembly having a first mount;

the first spray arm assembly is rotatably connected with the first mounting seat of the water pipe assembly.

12. The spray arm assembly of claim 11, further comprising a second spray arm assembly;

the first spray arm assembly is provided with a second mounting seat, and the second spray arm assembly is rotatably connected with the second mounting seat of the first spray arm assembly.

13. The spray arm assembly of claim 12, wherein the first mounting block corresponds in position to the second mounting block in the direction of arrangement of the first spray arm assembly and the second spray arm assembly;

or, the connection between the first spray arm assembly and the first mounting seat is taken as a boundary, the spray arm of the first spray arm assembly comprises a first part and a second part which are positioned in the length direction, at least one second spray arm assembly is arranged on the first part and/or the second part, and the number of the second mounting seats is the same as that of the second spray arm assemblies and is arranged in a one-to-one correspondence manner.

14. The spray arm apparatus of claim 12 or 13, wherein the second spray arm assembly comprises the spray arm assembly of any one of claims 1-10;

or the second spray arm assembly comprises a second spray arm and a second bearing structure, and the second spray arm is rotatably connected with the second mounting seat through the second bearing structure.

15. A dishwasher, characterized by comprising a spray arm arrangement according to any one of claims 11-14.

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