CN218128460U - Spray arm assembly and dish washing machine - Google Patents

Abstract

The utility model discloses a spray arm component and a dish washing machine, wherein the spray arm component comprises a spray arm seat, a first spray arm, a second spray arm and a bearing, the first spray arm is connected with the spray arm seat and can rotate around the axis of the spray arm seat; the second spray arm is connected with the first spray arm and can swing around the axis of the second spray arm; the bearing includes inner circle and outer lane, along the axial of bearing, the outer lane is including cup jointing portion and connecting portion, cup jointing portion is rotatable to be cup jointed in the outside of inner circle, one of them and first spray arm fixed connection of connecting portion and inner circle, another person and second spray arm fixed connection, because first spray arm and second spray arm can be connected with the bearing respectively along the axial of bearing, consequently can reduce the junction of first spray arm and second spray arm along the radial wall thickness of bearing, under the prerequisite of maintaining the junction unidimensional, can improve the cross sectional area of the runner of junction, make spray arm subassembly during operation, the water pressure of the rivers of spouting is bigger, be favorable to improving abluent effect.

Description

Spray arm assembly and dish washing machine

Technical Field

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

Background

In the related art, as the living standard of materials is improved, a dish washer capable of freeing both hands is gradually becoming a 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 through a rotary spray arm to wash the surface of tableware, and the washing effect of the household dish washer is closely related to the design of the spray arm. The main spray arm and the auxiliary spray arm of the spray arm component of part of the dish washing machine are connected through the bearing, the main spray arm, the bearing and the auxiliary spray arm are sequentially sleeved and fixed along the radial direction of the bearing, so that the main spray arm and the auxiliary spray arm are large in the radial wall thickness of the bearing at the joint, the cross-sectional area of a flow channel of the main spray arm and the auxiliary spray arm at the joint is small, the water pressure of water flow jetted by the spray arm component during working is low, and the washing effect of the dish washing machine is reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a spray arm subassembly can increase the cross sectional area of the runner of the junction between main, the vice spray arm, improves the washing effect.

The utility model discloses still provide a dish washer that has above-mentioned spray arm subassembly in addition.

According to the utility model discloses spray arm subassembly of first aspect embodiment includes:

a spray arm seat;

the first spray arm is connected with the spray arm seat and can rotate around the axis of the spray arm seat;

the second spray arm is connected with the first spray arm and can swing around the axis of the second spray arm;

the bearing comprises an inner ring and an outer ring, wherein the outer ring comprises a sleeving part and a connecting part, the sleeving part is rotatably sleeved on the outer side of the inner ring, one of the connecting part and the inner ring is fixedly connected with the first spray arm, and the other one of the connecting part and the inner ring is fixedly connected with the second spray arm.

According to the utility model discloses spray arm subassembly of first aspect embodiment has following beneficial effect at least:

because the outer lane of bearing includes along the portion of cup jointing and connecting portion that the axial distributes, the portion of cup jointing is rotatable to be cup jointed in the outside of inner circle, when first spray arm and second spray arm pass through the bearing and connect, the inner circle cup joints the tip of being fixed in one of them of first spray arm and second spray arm, connecting portion fixed connection is in the tip of the other of first spray arm and second spray arm, thereby make first spray arm and second spray arm can be connected with the bearing respectively along the axial of bearing, consequently, the radial wall thickness of bearing is followed to the junction that can reduce first spray arm and second spray arm, under the prerequisite that maintains the junction same size, can improve the cross sectional area of the runner of junction, make the spray arm subassembly during operation, the water pressure of the rivers that jet is bigger, be favorable to improving abluent effect.

According to the utility model discloses a some embodiments, connecting portion are provided with first internal thread, first spray arm perhaps the second spray arm is provided with the link, the outer wall of link be provided with the first external screw thread of first interior screw-thread fit.

According to the utility model discloses a some embodiments, connecting portion are provided with the second external screw thread, first spray arm perhaps the second spray arm is provided with the link, the link be provided with second external screw thread complex second internal thread.

According to some embodiments of the utility model, the inner wall of inner circle is provided with spacing portion, first spray arm or the second spray arm be provided with spacing portion complex cooperation portion.

According to the utility model discloses a some embodiments, spacing portion is the annular bulge, cooperation portion is the ring channel.

According to some embodiments of the utility model, the link set up in the second spray arm, the tip of first spray arm includes first linkage segment and second linkage segment, the inner circle cup joint in the outer wall of first linkage segment, the second linkage segment stretch into the inner chamber of link, the chamber wall of inner chamber is provided with pushing off the slag portion, pushing off the slag portion orientation the outer wall of second linkage segment.

According to some embodiments of the utility model, the pushing off slag portion is annular boss, annular boss cover is located the outside of second linkage segment.

According to some embodiments of the utility model, annular boss is provided with a plurality ofly, and is a plurality of annular boss follows the axial interval distribution of inner chamber.

According to some embodiments of the present invention, the annular boss has a gap with the outer wall of the second connection section, the gap gradually decreases along a direction deviating from the first connection section.

According to some embodiments of the utility model, first spray arm still be provided with surround in the supporting part of second spray arm periphery, the second spray arm is kept away from the one end of bearing is provided with the rotation axis, the rotation axis overlap joint in the supporting part.

According to some embodiments of the utility model, the supporting part is provided with the slot, the rotation axis cartridge in the slot and can be relative the supporting part rotates.

According to the utility model discloses dish washer of second aspect embodiment, include the spray arm subassembly of the first aspect embodiment of the utility model.

According to the utility model discloses dish washer of second aspect embodiment has following beneficial effect at least:

the dish washing machine adopts the spray arm assembly, the spray arm assembly comprises the first spray arm, the second spray arm and the bearing, the outer ring of the bearing comprises the sleeve-joint part and the connecting part which are distributed along the axial direction, the sleeve-joint part is rotatably sleeved on the outer side of the inner ring, when the first spray arm and the second spray arm are connected through the bearing, the inner ring is sleeved and fixed on the end part of one of the first spray arm and the second spray arm, and the connecting part is fixedly connected to the end part of the other of the first spray arm and the second spray arm, so that the first spray arm and the second spray arm can be respectively connected with the bearing along the axial direction of the bearing, the radial wall thickness of the connecting part of the first spray arm and the second spray arm along the bearing can be reduced, the cross-sectional area of a flow channel of the connecting part can be improved on the premise of maintaining the same size of the connecting part, when the spray arm assembly works, the water pressure of the sprayed water flow is larger, and the improvement of the cleaning effect of the dish washing machine is facilitated.

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

Fig. 1 is a schematic perspective view of a spray arm assembly according to some embodiments of the present invention;

fig. 2 is an exploded view of a spray arm assembly according to some embodiments of the present invention;

fig. 3 is a schematic cross-sectional view of a spray arm assembly according to some embodiments of the present invention;

fig. 4 is a schematic cross-sectional view of a connection between a first spray arm and a second spray arm according to some embodiments of the present invention;

fig. 5 is a schematic cross-sectional view of a connection between a first spray arm and a second spray arm according to another embodiment of the present invention;

fig. 6 is a schematic cross-sectional view of a connection between a first spray arm and a second spray arm according to further embodiments of the present invention;

fig. 7 is a schematic cross-sectional view of a connection between a first spray arm and a second spray arm according to further embodiments of the present invention;

fig. 8 is a schematic cross-sectional view of a bearing according to further embodiments of the present invention;

fig. 9 is a perspective view of a spray arm assembly according to other embodiments of the present invention.

Reference numerals are as follows:

a first spray arm 100; a fitting portion 110; a first connection section 111; a second connection section 112; a first water hole 113; a first external thread 120; a second internal thread 130; a support part 140;

the second spray arm 200; a slag trap portion 210; a second water hole 211; a rotating shaft 212;

a bearing 300; an inner race 310; a stopper portion 311; an outer race 320; a socket portion 321; a connecting portion 322; balls 330; a sealing cover 340; a first internal thread 350; a second external thread 360;

a spray arm base 400;

a rotating shaft 500; a bearing housing 600; a sun gear 610; a drive gear 620; a ring gear 700; a turntable 800.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are exemplary only for explaining the present invention, and should not be construed as limiting the present invention.

In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, a plurality of meanings are one or more, a plurality of meanings are two or more, and the terms greater than, smaller than, exceeding, etc. are understood as excluding the number, and the terms greater than, lower than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present invention, unless otherwise explicitly defined, words such as setting, installation, connection, assembly, and coordination should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meaning of the above words in the present invention by combining the specific contents of the technical solution.

In the related art, as the living standard of materials is improved, a dish washer capable of freeing both hands is gradually becoming a 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 through a rotary spray arm to wash the surface of tableware, and the washing effect of the household dish washer is closely related to the design of the spray arm. The main spray arm and the auxiliary spray arm of the spray arm component of part of the dish washing machine are connected through the bearing, and the main spray arm, the bearing and the auxiliary spray arm are sequentially sleeved and fixed along the radial direction of the bearing, so that the main spray arm and the auxiliary spray arm are larger in the radial thickness of the bearing at the joint, the cross section of a flow channel of the main spray arm and the auxiliary spray arm at the joint is smaller, the water pressure of water flow jetted by the spray arm component during working is lower, and the washing effect of the dish washing machine is reduced.

In order to solve the at least one technical problem, the utility model provides a spray arm assembly, its cross sectional area that can increase the runner of the junction between main, the vice spray arm is favorable to promoting the water pressure of the water jet of spray arm assembly to improve the washing effect.

Referring to fig. 1 to 3, a spray arm assembly according to an embodiment of the present invention includes a spray arm base 400, a first spray arm 100, a second spray arm 200, and a bearing 300. The first spray arm 100 is installed at the upper end of the spray arm base 400, the first spray arm 100 can rotate around the axis of the spray arm base 400, the first spray arm 100 is hollow, and the outer wall of the first spray arm 100 is provided with a first water spray hole 113 communicated with the inner space. The second spray arm 200 is mounted at the end of the first spray arm 100, and the second spray arm 200 can swing around its own axis relative to the first spray arm 100, the second spray arm 200 is hollow inside, and the outer wall of the second spray arm 200 is provided with a second water spray hole 211 communicating with the inner space. When the spray arm assembly is operated, the first spray arm 100 rotates around the axis of the spray arm base 400, so as to drive the second spray arm 200 to rotate around the axis of the spray arm base 400, and meanwhile, the second spray arm 200 can also swing around the axis of the second spray arm 200, so that more complex spray water flow is generated, and the washing effect is improved. Specifically, the spray arm assembly further comprises a rotating shaft 500, a bearing seat 600, a rotating disc 800, a gear ring 700, a central gear 610 and a transmission gear 620, wherein the spray arm seat 400 is fixed on a base of the dishwasher, the first spray arm 100 is rotatably installed on the spray arm seat 400 through the rotating shaft 500, the bearing seat 600 is fixedly arranged relative to the spray arm seat 400, the transmission gear 620 is rotatably installed on the bearing seat 600 and is in meshing connection with the central gear 610 sleeved and fixed on the outer wall of the rotating shaft 500, the transmission gear 620 is simultaneously in meshing connection with the gear ring 700 sleeved on the outer side of the transmission gear 620, the rotating disc 800 is fixedly installed on the gear ring 700, the rotating disc 800 is provided with a first protruding portion, the second spray arm 200 is provided with a second protruding portion matched with the first protruding portion, when the first spray arm 100 and the second spray arm 200 rotate around the spray arm seat 400, the rotating shaft 500 rotates to drive the central gear 610 to rotate, the gear 610 drives the gear ring 700 to rotate through the transmission gear 620, so that the rotating disc 800 rotates, and in the rotating process, the first protruding portion of the rotating disc 800 is in contact with the second protruding portion of the second spray arm 200, so that the second spray arm 200 can swing around the axis of the second spray arm to form a water flow.

Referring to fig. 9, the bearing 300 includes an inner ring 310 and an outer ring 320, and the outer ring 320 includes a socket portion 321 and a connecting portion 322 along an axial direction of the bearing 300, wherein the socket portion 321 is rotatably sleeved on an outer side of the inner ring 310. Specifically, balls 330 or other rolling elements are installed between the socket portion 321 and the inner ring 310, so that the socket portion 321 can reliably rotate relative to the inner ring 310. One of the connecting portion 322 and the inner ring 310 is fixedly connected to the first spray arm 100, and the other is fixedly connected to the second spray arm 200, and at this time, the first spray arm 100 and the second spray arm 200 are connected, and the second spray arm 200 can rotate relative to the first spray arm 100.

Because the outer ring 320 of the bearing 300 includes the socket portion 321 and the connecting portion 322 distributed along the axial direction, the socket portion 321 is rotatably sleeved on the outer side of the inner ring 310, when the first spray arm 100 and the second spray arm 200 are connected by the bearing 300, the inner ring 310 is fixedly sleeved on the end portion of one of the first spray arm 100 and the second spray arm 200, and the connecting portion 322 is fixedly connected to the end portion of the other of the first spray arm 100 and the second spray arm 200, so that the first spray arm 100 and the second spray arm 200 can be respectively connected with the bearing 300 along the axial direction of the bearing 300, and the overlapping and sleeving of the first spray arm 100, the bearing 300 and the second spray arm 200 in the radial direction of the bearing 300 can be avoided, thereby reducing the wall thickness of the connection portion of the first spray arm 100 and the second spray arm 200 along the radial direction of the bearing 300, and increasing the cross-sectional area of the smallest flow passage at the connection portion on the premise of maintaining the same size at the connection portion, so that when the spray arm assembly works, the water pressure of the sprayed water flow is greater, which is beneficial to improving the cleaning effect, the 310, the inner ring 300 and the bearing 300 can also be increased, and the outer ring 300 of the bearing 300 can be more convenient for increasing the installation efficiency of the spray arm 100 and the installation of the second spray arm assembly, and the installation efficiency of the second spray arm 100.

It is understood that, in some embodiments of the present invention, the inner wall of the connection portion 322 is provided with a first internal thread 350, one of the first spray arm 100 and the second spray arm 200 is provided with a connection end, and the outer wall of the connection end is provided with a first external thread 120 engaged with the first internal thread 350. For example, referring to fig. 5, the first spray arm 100 is provided with a connection end, and the outer wall of the connection end is provided with the first external thread 120, so that the connection portion 322 can be connected to the outside of the connection end through a threaded connection sleeve, so that the outer ring 320 of the bearing 300 is sleeved on the outside of the first spray arm 100, and the inner ring 310 is sleeved on the outside of the second spray arm 200. Of course, referring to fig. 4, the second spray arm 200 may be provided with a connection end, and the outer wall of the connection end is provided with the first external thread 120, so that the outer ring 320 may be screwed to the outer side of the second spray arm 200 through the connection portion 322, and the inner ring 310 is sleeved to the outer side of the first spray arm 100.

It can be understood that, in some embodiments of the present invention, the outer wall of the connecting portion 322 is recessed toward the axis of the bearing 300 relative to the outer wall of the socket portion 321, so that the outer diameter of the connecting portion 322 is smaller relative to the outer diameter of the socket portion 321, at this time, one of the first spray arm 100 and the second spray arm 200 is provided with the connecting end by providing the second external thread 360 on the outer wall of the connecting portion 322, the inner wall of the connecting end is provided with the second internal thread 130 matched with the second external thread 360, which is beneficial to further reducing the radial size of the connecting position of the first spray arm 100 and the second spray arm 200 in the bearing 300. For example, the first spray arm 100 is provided with a connecting end, and the inner wall of the connecting end is provided with the second internal thread 130, so that the connecting end can be screwed to the outer side of the connecting portion 322, so that the first spray arm 100 is sleeved on the outer side of the outer ring 320, and the inner ring 310 is sleeved and fixed on the outer side of the second spray arm 200. Of course, referring to fig. 6, the second spray arm 200 may also be provided with a connecting end, and the inner wall of the connecting end is provided with the second internal thread 130, so that the second spray arm 200 is sleeved on the outer side of the outer ring 320, and the inner ring 310 is sleeved and fixed on the outer side of the first spray arm 100.

Referring to fig. 4 to 7, it should be noted that, in order to securely fix the inner ring 310 of the bearing 300 to the end of the first spray arm 100 or the second spray arm 200 in a sleeved manner, in some embodiments of the present invention, the inner wall of the inner ring 310 is provided with a limiting portion 311, and the outer wall of the end of one of the first spray arm 100 and the second spray arm 200 is provided with an engaging portion 110 engaged with the limiting portion 311. The inner ring 310 is firmly fixed to the outer side of the end of the first spray arm 100 or the second spray arm 200 by the engagement of the stopper 311 and the engagement portion 110, and the inner ring 310 is prevented from being easily released to cause connection failure.

Referring to fig. 4 to 8, it can be understood that, in some embodiments of the present invention, the position-limiting portion 311 is an annular protrusion disposed on an inner wall of the inner ring 310, and the engagement portion 110 is an annular groove disposed on an outer wall of an end portion of the first spray arm 100 or the second spray arm 200. When being installed, the annular protrusion can be inserted into the annular groove, thereby fixedly connecting the inner ring 310 to the end of the first spray arm 100 or the second spray arm 200. Of course, the limiting portion 311 may also be a clamping block, and the matching portion 110 may be a corresponding clamping groove, and the clamping block is clamped into the clamping groove to achieve limiting, so as to prevent the inner ring 310 from being easily loosened from the end of the first spray arm 100 or the second spray arm 200.

It should be noted that, since the outer ring 320 of the bearing 300 can rotate relative to the inner ring 310, the socket portion 321 of the outer ring 320 is socket-connected to the outer side of the inner ring 310, and the connection portion 322 of the outer ring 320 extends along the axial direction, in order to prevent the connection portion 322 from contacting the inner ring 310 and rubbing when the outer ring 320 rotates relative to the inner ring 310, a gap with a certain width needs to be left between the connection portion 322 and the inner ring 310 in the axial direction, when the spray arm assembly works, when the washing water passes through the connection portion of the first spray arm 100 and the second spray arm 200, a part of the washing water will leak out from the gap between the connection portion 322 and the inner ring 310, and dregs in the washing water may enter the inside of the bearing 300 to affect the normal operation of the bearing 300. Therefore, referring to fig. 7, in some embodiments of the present invention, the connection portion 322 of the outer ring 320 is screwed to the outer wall of the connection end of the second spray arm 200, the end portion of the first spray arm 100 includes the first connection section 111 and the second connection section 112, the inner ring 310 is sleeved and fixed to the outer wall of the first connection section 111, the second connection section 112 extends into the inner cavity of the connection end, and the cavity wall of the inner cavity has the residue blocking portion 210 protruding toward the outer wall of the second connection section 112, so when the washing water passes through the connection portion of the first spray arm 100 and the second spray arm 200, and the washing water leaking from the connection portion flows toward the inner ring 310 of the bearing 300, the residue blocking portion 210 can play a role of blocking residues in the washing water, thereby the amount of residues flowing to the inner ring 310 can be reduced, further, the influence of the residues on the operation of the bearing 300 can be reduced, and the reliability of the operation of the bearing 300 can be improved. Of course, the bearing 300 may further be provided with a sealing cover 340 at a side of the inner ring 310 away from the second connecting section 112, and foreign objects such as external dust may be reduced from entering the gap between the inner ring 310 and the outer ring 320 through the sealing cover 340, so as to reduce the influence of the foreign objects on the bearing 300.

Referring to fig. 7, it can be appreciated that in some embodiments of the present invention, the slag trap portion 210 may be an annular boss, and the annular boss is sleeved on the outer side of the second connection section 112. The annular boss can play a good role in blocking dregs in the washing water to the second connecting section 112, and prevent the dregs from flowing into the space between the inner ring 310 and the outer ring 320 of the bearing 300 too much to affect the normal operation of the bearing 300. Of course, the slag trap 210 may be formed of a plurality of stoppers, thereby performing a certain slag-trapping function.

Referring to fig. 7, it can be understood that, in some embodiments of the present invention, a plurality of annular bosses are provided, and the plurality of annular bosses are distributed along the axial direction of the inner cavity at intervals, so that a sink groove is formed between two adjacent annular bosses. Through above-mentioned design, can improve the effect of pushing off the sediment through a plurality of annular bosss on the one hand, on the other hand makes and can form labyrinth through a plurality of annular bosss between the chamber wall of inner chamber and the outer wall of second linkage segment 112 to can reduce the flow that washing water revealed through labyrinth, and then can reduce the quantity of dregs.

Referring to fig. 7, it can be understood that, in order to further reduce the leakage amount of the washing water, in some embodiments of the present invention, the annular boss has a gap with the outer wall of the second connection section 112, and the gap is gradually reduced along a direction departing from the first connection section 111, so that the washing water leaking from the connection between the first spray arm 100 and the second spray arm 200 passes through the second connection section 112 and needs to pass through a narrow gap to enter a larger space between the two annular bosses, so that the washing water generates a vortex to cause continuous loss of kinetic energy, thereby reducing the flow rate of the washing water, further reducing the flow rate of the washing water, and further reducing the amount of the dregs flowing into the interior of the bearing 300.

Referring to fig. 1 and 2, it should be noted that, since one end of the second spray arm 200 is connected to the first spray arm 100, and the size of the second spray arm 200 along the axis thereof is generally large, the bending moment at the connection between the second spray arm 200 and the first spray arm 100 is large, which causes the bearing 300 to be stressed greatly and easily damaged, for this reason, in some embodiments of the present invention, the first spray arm 100 is further provided with a supporting portion 140 surrounding the periphery of the second spray arm 200, one end of the second spray arm 200 away from the bearing 300 is provided with a rotating shaft 212, and the rotating shaft 212 is lapped on the supporting portion 140, so that both ends of the second spray arm 200 can be supported, thereby reducing the bending moment at the connection between the second spray arm 200 and the first spray arm 100, alleviating the stress condition of the bearing 300, and improving the service life of the bearing 300.

Referring to fig. 1, it can be understood that, in some embodiments of the present invention, the supporting portion 140 is provided with a slot, the at least partial cartridge of the rotating shaft 212 is disposed in the slot, and when the second spray arm 200 swings around its axis, the rotating shaft 212 can rotate in the slot, so as to reduce the swing of the rotating shaft 212, improve the smoothness of the swing of the second spray arm 200, and avoid the rotating shaft 212 from swinging too much relative to the supporting portion 140, which causes the bearing 300 to be stressed too much to affect the smoothness of the swing of the second spray arm 200.

Referring to fig. 1 to 3, it should be noted that the spray arm assembly may include only one first spray arm 100 and one second spray arm 200, and the leakage point of the spray arm assembly is small, so that it is advantageous to increase the pressure of the water jet of the spray arm assembly and improve the washing effect. Of course, referring to fig. 9, the spray arm assembly may also include a first spray arm 100 and two second spray arms 200, and the two second spray arms 200 are respectively connected to two ends of the first spray arm 100 through bearings 300, so that the spray arm assembly may obtain more swinging spray streams, which is beneficial to improving the washing effect.

The utility model discloses dish washer of second aspect embodiment, include the spray arm subassembly of the first aspect embodiment of the utility model.

The dishwasher adopts the spray arm assembly, the spray arm assembly comprises the first spray arm 100, the second spray arm 200 and the bearing 300, the outer ring 320 of the bearing 300 comprises the sleeve-joint part 321 and the connecting part 322 which are distributed along the axial direction, the sleeve-joint part 321 can be rotatably sleeved on the outer side of the inner ring 310, when the first spray arm 100 and the second spray arm 200 are connected through the bearing 300, the inner ring 310 is fixedly sleeved on the end part of one of the first spray arm 100 and the second spray arm 200, the connecting part 322 is fixedly connected on the end part of the other of the first spray arm 100 and the second spray arm 200, so that the first spray arm 100 and the second spray arm 200 can be respectively connected with the bearing 300 along the axial direction of the bearing 300, can avoid first spray arm 100, bearing 300 and second spray arm 200 three cup joint at the ascending coincide of bearing 300 footpath, consequently, can reduce the junction of first spray arm 100 and second spray arm 200 along the radial wall thickness of bearing 300, under the prerequisite of maintaining the junction equidimension, can improve the cross sectional area of the minimum runner of junction, make spray arm subassembly during operation, the water pressure of the rivers of spouting is bigger, be favorable to improving the abluent effect of dishwasher, certainly, also can increase the thickness of bearing 300 inner circle 310 and outer lane 320, improve bearing 300's structural strength, and make the installation of first spray arm 100 and second spray arm 200 also more convenient, be favorable to improving the efficiency of installation.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.

Claims (12)

1. Spray arm subassembly, its characterized in that includes:

a spray arm seat;

the first spray arm is connected with the spray arm seat and can rotate around the axis of the spray arm seat;

the second spray arm is connected with the first spray arm and can swing around the axis of the second spray arm;

the bearing comprises an inner ring and an outer ring, wherein the outer ring comprises a sleeving part and a connecting part, the sleeving part is rotatably sleeved on the outer side of the inner ring, one of the connecting part and the inner ring is fixedly connected with the first spray arm, and the other one of the connecting part and the inner ring is fixedly connected with the second spray arm.

2. The spray arm assembly of claim 1, wherein the connecting portion is provided with a first internal thread, and the first spray arm or the second spray arm is provided with a connecting end, and an outer wall of the connecting end is provided with a first external thread engaged with the first internal thread.

3. The spray arm assembly of claim 1 wherein said connecting portion is provided with a second external thread and said first spray arm or said second spray arm is provided with a connecting end provided with a second internal thread that mates with said second external thread.

4. The spray arm assembly of any one of claims 1 to 3, wherein the inner wall of the inner ring is provided with a limiting portion, and the first spray arm or the second spray arm is provided with an engaging portion engaged with the limiting portion.

5. The spray arm assembly of claim 4, wherein the retaining portion is an annular protrusion and the engagement portion is an annular groove.

6. The spray arm assembly of claim 2, wherein the connecting end is disposed on the second spray arm, the end of the first spray arm includes a first connecting section and a second connecting section, the inner ring is sleeved on the outer wall of the first connecting section, the second connecting section extends into the inner cavity of the connecting end, a slag blocking portion is disposed on the wall of the inner cavity, and the slag blocking portion faces the outer wall of the second connecting section.

7. The spray arm assembly of claim 6, wherein the slag trap portion is an annular boss, and the annular boss is sleeved outside the second connection section.

8. The spray arm assembly of claim 7 wherein said annular boss is provided in a plurality, said plurality being spaced axially along said interior chamber.

9. The spray arm assembly of claim 8 wherein the annular boss has a gap with an outer wall of the second coupling segment, the gap decreasing in a direction away from the first coupling segment.

10. The spray arm assembly of claim 1 wherein said first spray arm is further provided with a support portion surrounding an outer periphery of said second spray arm, an end of said second spray arm remote from said bearing being provided with a pivot shaft, said pivot shaft being attached to said support portion.

11. The spray arm assembly of claim 10, wherein the support portion is provided with a slot, and the rotary shaft is inserted into the slot and can rotate relative to the support portion.

12. Dishwasher, characterized in that it comprises a spray arm assembly according to any of claims 1 to 11.

Images