CN110859562A

CN110859562A - Spray arm assembly and washing electric appliance with same

Info

Publication number: CN110859562A
Application number: CN201810991108.XA
Authority: CN
Inventors: 赵利铭; 费望春
Original assignee: Midea Group Co Ltd; Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Foshan Shunde Midea Washing Appliances Manufacturing Co Ltd
Priority date: 2018-08-28
Filing date: 2018-08-28
Publication date: 2020-03-06

Abstract

The invention discloses a spray arm assembly and a washing appliance with the same. This spray arm subassembly includes: a spray arm having a spray arm internal thread; the spray arm is connected with the spray arm seat, and the spray arm can rotate relative to the spray arm seat; the ball subassembly, the ball subassembly sets up spray arm with the cooperation department of being connected of spraying the arm seat, just the ball subassembly includes: the spraying arm comprises a bearing base body and a ball, wherein the ball is rotatably arranged on the bearing base body, and a ball external thread matched with the spray arm internal thread is arranged on the bearing base body. According to the spray arm assembly, the spray arm is connected with the spray arm seat through the ball assembly, so that the friction force between the spray arm and the spray arm seat can be reduced, hydrodynamic loss is reduced, the height size of the spray arm assembly can be reduced, more space is reserved for placing a piece to be cleaned, and the capacity of a washing appliance is improved.

Description

Spray arm assembly and washing electric appliance with same

Technical Field

The invention relates to the technical field of household appliances, in particular to a spray arm assembly and a washing appliance with the same.

Background

To current spray arm subassembly say, the main mode that spray arm and spray arm seat are connected is through joint flange and buckle cooperation, but this kind of connected mode can lead to the gap between spray arm and the spray arm seat great, and when spray arm during operation, the water in the spray arm is revealed through this gap easily, influences the cleaning performance. In addition, when the spray arm and the spray arm seat generate relative motion, the friction mode between the spray arm and the spray arm seat is sliding friction, and therefore the lost hydrodynamic force is large. On the other hand, the buckle connected mode directly leads to spouting the upper and lower high dimension of arm seat and spray arm great, extravagant washing electrical apparatus's inner bag space like this, has reduced the inside space of putting of treating the washing piece of washing electrical apparatus.

Disclosure of Invention

The present invention is directed to solving, at least to some extent, one of the above-mentioned problems in the prior art. Therefore, the invention provides a spray arm assembly which can reduce the friction force between a spray arm and a spray arm seat.

The invention also provides a washing electric appliance with the spray arm assembly.

The spray arm assembly according to an embodiment of the present invention includes: a spray arm having a spray arm internal thread; the spray arm is connected with the spray arm seat, and the spray arm can rotate relative to the spray arm seat; the ball assembly is arranged at the connection and matching position of the spray arm and the spray arm seat, and a ball external thread matched with the spray arm internal thread is arranged on the ball assembly.

According to the spray arm assembly provided by the embodiment of the invention, the spray arm is connected with the spray arm seat through the ball assembly, so that the friction force between the spray arm and the spray arm seat can be reduced, the hydrodynamic loss is reduced, in addition, the height size of the spray arm assembly can be reduced, more space is reserved for placing a piece to be cleaned, and the capacity of a washing appliance is improved.

According to some embodiments of the invention, the ball assembly comprises: the bearing device comprises a bearing base body and a ball, wherein the ball is rotatably arranged on the bearing base body, and the ball external thread is arranged on the bearing base body.

Further, the load bearing substrate comprises: an outer sleeve disposed outside the ball; or the inner sleeve is sleeved inside the outer sleeve.

Further, the load-bearing substrate further comprises: the ball bearing structure comprises an intermediate sleeve, wherein a plurality of ball holes are formed in the intermediate sleeve, balls are installed in the ball holes, and the balls protrude from the inner circumferential surface and the outer circumferential surface of the intermediate sleeve in the radial direction of the intermediate sleeve.

According to some embodiments of the invention, the load bearing substrate comprises: an outer sleeve disposed outside the ball; an inner sleeve disposed inside the outer sleeve; the middle sleeve is arranged between the outer sleeve and the inner sleeve, a plurality of ball holes are formed in the middle sleeve, the balls are installed in the ball holes, and the balls protrude out of the inner circumferential surface and the outer circumferential surface of the middle sleeve in the radial direction of the middle sleeve.

Further, an outer sleeve ball groove suitable for being matched with the balls is formed in the inner circumferential surface of the outer sleeve, an inner sleeve ball groove suitable for being matched with the balls is formed in the outer circumferential surface of the inner sleeve, and the outer sleeve ball groove and the inner sleeve ball groove are circumferential annular grooves.

Specifically, the outer sleeve includes: the spraying device comprises an outer sleeve peripheral wall and an outer sleeve bottom wall, wherein the outer sleeve bottom wall is arranged at one end, far away from the spraying arm, of the outer sleeve peripheral wall, the outer sleeve bottom wall extends inwards in the radial direction of the outer sleeve peripheral wall, and the balls are arranged above the outer sleeve bottom wall.

The spray arm seat is detachably connected with the inner sleeve.

According to some embodiments of the invention, the spray arm base comprises: the spray arm seat body is provided with a spray arm seat buckle, and the spray arm seat buckle is suitable for being clamped at the top end of the inner sleeve.

Further, the spray arm seat includes: spray arm seat body and along the radial spray arm seat flange that outwards extends of spray arm seat body, the ball subassembly sets up the top of spray arm seat flange, the clearance between the lower surface of outer sleeve and the upper surface of spray arm seat flange is L1, and L1 satisfies the relational expression: l1 is more than 0mm and less than or equal to 1 mm.

Specifically, the top of spouting arm seat body has a plurality of recesses, the opening direction of recess with the axis direction of spouting arm seat body is parallel, spout arm seat buckle follow the diapire of recess upwards extends, just spout the both sides of arm seat buckle with two lateral walls of recess separate, the top of spouting arm seat buckle is provided with the orientation the trip of inner skleeve.

According to some embodiments of the invention, the spray arm base comprises: the spray arm seat comprises a spray arm seat body, wherein spray arm seat internal threads are formed in the inner peripheral surface of the spray arm seat body, inner sleeve external threads are formed in the outer peripheral surface of the inner sleeve, and the inner sleeve external threads are in threaded connection with the spray arm seat internal threads.

Optionally, a gap between the lower surface of the outer sleeve and the upper surface of the spray arm seat body is L2, and L2 satisfies the relation: l2 is more than 0mm and less than or equal to 1 mm.

The spray arm seat is provided with a spray arm seat body and a spray arm seat inner flange, the spray arm seat inner flange extends inwards along the radial direction of the spray arm seat body, a gap between the lower surface of the inner sleeve and the upper surface of the spray arm seat inner flange is L3, and L3 satisfies the relational expression: l3 is more than 0mm and less than or equal to 0.5 mm.

Furthermore, the spray arm seat is provided with a spray arm seat body and a spray arm seat inner flange, the spray arm seat inner flange extends inwards along the radial direction of the spray arm seat body, the central axis of the inner sleeve is overlapped with the central axis of the spray arm seat inner flange, and the inner diameter of the inner sleeve is equal to the inner diameter of the spray arm seat inner flange.

Specifically, the spray arm includes: the spray arm comprises a spray arm body and a spray arm connecting sleeve, wherein the spray arm connecting sleeve is arranged on the lower side of the spray arm body, the spray arm connecting sleeve is provided with a spray arm cavity communicated with the spray arm body, a spray arm seat cavity communicated with the spray arm cavity is arranged in a spray arm seat, spray arm internal threads are arranged on the inner peripheral surface of the spray arm connecting sleeve, and ball external threads are arranged on the outer peripheral surface of an outer sleeve.

According to some embodiments of the invention, the spray arm comprises: the spray arm comprises a spray arm body and a spray arm connecting sleeve, wherein the spray arm connecting sleeve is arranged on the lower side of the spray arm body, the spray arm connecting sleeve is provided with a spray arm cavity communicated with the spray arm body, a spray arm seat cavity communicated with the spray arm cavity is arranged in a spray arm seat, spray arm internal threads are arranged on the inner peripheral surface of the spray arm connecting sleeve, and ball external threads are arranged on the outer peripheral surface of an outer sleeve.

Optionally, the ball hole sets up the bottom of middle sleeve, the ball hole is major arc hole and bottom breach department forms the ball and gets and put the mouth.

Optionally, a weakening groove is arranged between two adjacent ball holes, and a weakening groove column is arranged in the weakening groove.

Preferably, the number of balls is an even number.

According to another aspect of the invention, a washing appliance comprises the spray arm assembly described above.

Drawings

FIG. 1 is a front view of a first embodiment of a spray arm assembly;

FIG. 2 is a left side view of the first embodiment of the spray arm assembly;

FIG. 3 is a bottom view of the first embodiment of the spray arm assembly;

FIG. 4 is an exploded view of the first embodiment of the spray arm assembly;

FIG. 5 is a cross-sectional view of the first embodiment of the spray arm assembly;

FIG. 6 is a partial enlarged view of FIG. 5 at A;

FIG. 7 is a perspective view of the ball assembly of the first embodiment of the spray arm assembly;

FIG. 8 is a perspective view in half section of the ball assembly of the first embodiment of the spray arm assembly;

FIG. 9 is a cross-sectional view of the ball assembly of the first embodiment of the spray arm assembly;

FIG. 10 is an exploded view of a second embodiment of the spray arm assembly;

FIG. 11 is a cross-sectional view of a second embodiment of the spray arm assembly;

fig. 12 is a partial enlarged view of fig. 11 at B;

FIG. 13 is a perspective view of the ball assembly of the second embodiment of the spray arm assembly;

FIG. 14 is a cross-sectional view of the ball assembly of the second embodiment of the spray arm assembly;

FIG. 15 is an exploded view of the ball assembly of the second embodiment of the spray arm assembly;

fig. 16 is a perspective view of the intermediate sleeve.

Reference numerals:

a spray arm assembly 1000;

the spray arm comprises a spray arm 100, a spray arm body 110, a spray arm connecting sleeve 120, spray arm internal threads 121 and a spray arm cavity 130;

a spray arm base 200, a spray arm base body 210, a spray arm base flange 220, a spray arm base fastener 230, a spray arm base chamber 240, spray arm base internal threads 250, and a spray arm base internal flange 260;

the ball assembly 300, the outer sleeve 310, the outer sleeve peripheral wall 311, the outer sleeve bottom wall 312, the outer sleeve ball groove 313, the inner sleeve 320, the inner sleeve ball groove 321, the inner sleeve external thread 322, the balls 330, the ball external thread 340, the ball hole 350, the ball access opening 351, the weakening groove 360, the weakening groove column 361 and the middle sleeve 370.

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 or similar 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 drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

The spray arm assembly 1000 according to an embodiment of the present invention will be described in detail with reference to fig. 1 to 16. The spray arm assembly 1000 may be used in a washing appliance, and the structure of the spray arm assembly 1000 will be described below by taking the example of applying the spray arm assembly 1000 to a dishwasher.

Referring to fig. 1 to 5, and 10 to 11, a spray arm assembly 1000 according to an embodiment of the present invention may include: a spray arm 100, a spray arm seat 200 and a ball assembly 300.

Referring to fig. 5-6 and 11-12, the spray arm 100 has a spray arm internal thread 121, the spray arm 100 is connected to a spray arm base 200, the spray arm base 200 is located below the spray arm 100, and the spray arm 100 is rotatable relative to the spray arm base 200, by providing the spray arm base 200, a connection interface is provided for the spray arm 100, and meanwhile, after the spray arm 100 and the spray arm base 200 are connected into a whole, the spray arm base 200 can also serve as a water inlet pipeline of the spray arm 100. In some embodiments, the spray arm 100 is provided with a water spraying hole and a driving hole, when the water pressure in the spray arm 100 reaches a certain value, the spray arm 100 starts to spray water columns through the water spraying hole and the driving hole, the spray arm 100 rotates by the reaction force when the water columns are sprayed, the water columns are continuously sprayed from the water spraying hole and the driving hole as the water columns are sprayed out, the spray arm 100 can continuously rotate, the water columns sprayed from the water spraying hole and the driving hole can be sprayed to the surface of tableware or the inner wall of the dishwasher as the spray arm 100 rotates, and then the stain on the tableware or the inner wall of the dishwasher is washed, so that the washing of the tableware by the dishwasher is completed.

The ball assembly 300 is disposed at a coupling engagement of the spray arm 100 and the spray arm socket 200, and the ball assembly 300 may include: the spray arm comprises a bearing base body and a ball 330, wherein the ball 330 is rotatably arranged on the bearing base body, and a ball external thread 340 matched with the spray arm internal thread 121 is arranged on the bearing base body. The carrier substrate is fixedly attached to the spray arm 100.

In particular, the carrier substrate may be one part or an assembly comprising a plurality of parts. In the embodiment of the present invention, the carrier substrate is composed of more than one component, and one portion of the carrier substrate is fixedly connected to the spray arm 100, and the other portion of the carrier substrate is fixedly connected to the spray arm base 200, so that the spray arm 100 and the spray arm base 200 can be indirectly connected. The ball 330 is disposed in the middle of the bearing substrate, and the ball 330 can rotate in the bearing substrate, so that the relative rotation between the spray arm 100 and the spray arm seat 200 can be realized through the ball 330, and thus the friction form between the spray arm 100 and the spray arm seat 200 can be changed, and the sliding friction is changed into rolling friction, which is favorable for reducing the friction between the spray arm 100 and the spray arm seat 200.

The external part of the bearing substrate is provided with a ball external thread 340 matched with the spray arm internal thread 121, as shown in fig. 6-7 and 12-13, the ball external thread 340 is arranged on the outer peripheral surface of the external part of the bearing substrate, the fixed connection between the bearing substrate and the spray arm 100 is realized through the matching of the spray arm internal thread 121 and the ball external thread 340, the internal part of the bearing substrate is fixedly connected with the spray arm seat 200, the ball 330 is arranged between the internal part and the external part of the bearing substrate, the internal part and the external part of the bearing substrate can rotate relatively, thereby ensuring that the spray arm 100 and the spray arm seat 200 can rotate relatively, and the connection between the spray arm 100, the spray arm seat 200 and the ball assembly 300 is simple and stable in structure.

Through the arrangement of the ball assembly 300, when the spray arm 100 and the spray arm base 200 rotate relatively, the friction between the spray arm 100 and the spray arm base 200 is rolling friction, which is no longer sliding friction, so that the resistance of the rolling friction to the rotation of the spray arm 100 is very small, thereby reducing the hydrodynamic loss caused by friction and improving the utilization rate of hydrodynamic force. Meanwhile, the spray arm 100 rotates relatively fast relative to the spray arm base 200, so that the arrangement of the ball assembly 300 is beneficial to improving the smoothness of the rotation of the spray arm 100, and is beneficial to reducing the noise of the dishwasher.

In addition, compared with the original mode that the spray arm 100 is directly connected with the spray arm seat 200 through the buckle, after the spray arm 100 is connected with the spray arm seat 200 through the ball assembly 300, the distance between the spray arm 100 and the spray arm seat 200 can be reduced, so that the height size of the spray arm assembly 1000 is reduced, the internal space of the dishwasher is saved, more space is reserved for placing tableware, the tableware capacity of the dishwasher is further improved, and the internal loading capacity of the dishwasher can be increased by 10mm-40mm, for example.

The spray arm 100 is connected with the ball assembly 300 through threads, so that the spray arm is convenient to disassemble and assemble and is reliable in fixation.

In a specific embodiment, the balls 330 may be plastic balls or stainless steel balls, because the operating environment of the spray arm assembly 1000 is full of water, the spray arm assembly 1000 is in a damp and hot environment for a long time, which easily causes the balls 330 to rust and jam, and the plastic balls or stainless steel balls have a strong anti-corrosion capability, so that rusting of the balls 330 can be effectively slowed down or even avoided.

According to the spray arm assembly 1000 of the embodiment of the invention, the spray arm internal thread 121 is arranged on the inner circumferential surface of the spray arm 100, so as to provide an interface for connecting the spray arm 100 with the ball assembly 300, and the spray arm 100 is connected with the spray arm base 200 through the ball assembly 300, so that the friction between the spray arm 100 and the spray arm base 200 can be reduced, thereby being beneficial to reducing hydrodynamic loss, improving the utilization rate of hydrodynamic force, ensuring that the pressure when water is sprayed out from the spray holes of the spray arm 100 is higher, and being beneficial to improving the cleaning effect of the dishwasher on tableware. In addition, the height dimension of the spray arm assembly 1000 can be reduced, so that the internal space of the dish washing machine is saved, more space is reserved for placing tableware, and the tableware capacity of the dish washing machine is improved.

Specifically, referring to fig. 6 and 12, the spray arm 100 may include: the spray arm comprises a spray arm body 110 and a spray arm connecting sleeve 120, wherein the spray arm connecting sleeve 120 is arranged on the lower side of the spray arm body 110, the spray arm 100 and a spray arm seat 200 are convenient to connect through the spray arm connecting sleeve 120, and the spray arm 100 and the spray arm seat 200 can be reliably connected into a whole.

The spray arm connecting sleeve 120 and the spray arm body 110 are internally provided with a communicated spray arm cavity 130, and the spray arm seat 200 is internally provided with a spray arm seat cavity 240 communicated with the spray arm cavity 130, so that water at a water source of the dish washing machine can smoothly enter the spray arm cavity 130 through the spray arm seat cavity 240, and then the water is sprayed to the surface of tableware through the water spraying holes and the driving holes on the spray arm 100, thereby completing the operation of cleaning the tableware. Along with water continuously enters the spray arm chamber 130, the water pressure in the spray arm chamber 130 is higher and higher, the reaction force generated by the water column sprayed from the driving hole of the spray arm 100 is larger, the rotating speed of the spray arm 100 is higher, and meanwhile, the force of the sprayed water column beating on the tableware is larger, so that the tableware is favorably cleaned, and therefore, the better washing effect of the dishwasher can be ensured by arranging the spray arm chamber 130. The direction and position of the water column sprayed on the tableware by the spray arm 100 are multidirectional, so that dead corners are reduced, the tableware is easier to clean, and the cleaning time is correspondingly reduced due to the larger coverage rate of the water stream, namely the cleaning time is favorably shortened.

The spray arm internal thread 121 is arranged on the inner circumferential surface of the spray arm connecting sleeve 120, and the spray arm internal thread 121 is fixed with the bearing base body in a threaded manner, so that the spray arm connecting sleeve is convenient to disassemble and assemble and is reliable in fixation.

Referring to fig. 8-9, 13-15, the load bearing substrate may include: outer sleeve 310 (i.e., the aforementioned load bearing base outer component), inner sleeve 320 (i.e., the aforementioned load bearing base inner component), and intermediate sleeve 370.

As shown in fig. 6 and 12, the upper end of the outer sleeve 310 is sleeved inside the spray arm connecting sleeve 120, the ball external thread 340 is disposed on the outer circumferential surface of the outer sleeve 310, and the spray arm internal thread 121 is disposed on the inner circumferential surface of the spray arm connecting sleeve 120, so that the outer sleeve 310 and the spray arm connecting sleeve 120 can be connected into a whole by the matching connection of the ball external thread 340 and the spray arm internal thread 121, thereby ensuring that the bearing substrate and the spray arm 100 are reliably connected into a whole.

The inner sleeve 320 is arranged inside the outer sleeve 310 and the middle sleeve 370, and the inner sleeve 320 is fixedly connected with the spray arm seat 200, so that the bearing base body and the spray arm seat 200 are reliably connected into a whole.

Referring to fig. 4, 6, and 15-16, the intermediate sleeve 370 is disposed between the outer sleeve 310 and the inner sleeve 320, and the intermediate sleeve 370 is provided with a plurality of ball holes 350, the balls 330 are rotatably mounted in the ball holes 350, the ball holes 350 provide support for fixing the balls 330, so as to ensure that the relative positions of the balls 330 are not changed, and prevent the balls 330 from colliding and squeezing, thereby improving the working stability of the ball assembly 300, and further improving the smoothness of the spray arm 100 during rotation. Alternatively, the number of balls 330 is the same as the number of ball holes 350.

The balls 330 protrude from the inner circumferential surface and the outer circumferential surface of the intermediate sleeve 370 in the radial direction of the intermediate sleeve 370, that is, the diameter of the balls 330 is larger than the wall thickness of the intermediate sleeve 370, the balls 330 have only a middle portion installed in the intermediate sleeve 370, the outer sides of the balls 330 protrude from the outer circumferential surface of the intermediate sleeve 370, the inner sides of the balls 330 protrude from the inner circumferential surface of the intermediate sleeve 370, such that the outer sides of the balls 330 are in rolling contact with the inner surface of the outer sleeve 310, the inner sides of the balls 330 are in rolling contact with the outer surface of the inner sleeve 320, and the balls 330 are in rolling contact with the outer sleeve 310 and the inner sleeve 320, wherein the outer sleeve 310 is fixedly connected to the spray arm 100, and the inner sleeve 320 is fixedly connected to the spray arm holder 200, such that the balls 330 indirectly provide support for the connection between the spray arm 100 and the spray arm holder 200, and when the spray arm 100 and the spray arm holder 200 relatively rotate, the balls 100, so that the spray arm 100 and the spray arm base 200 have rolling friction.

Alternatively, the diameter of the balls 330 is 3mm to 8mm, and the number of the balls 330 is 4 to 12. Preferably, the number of the balls 330 is even, so that the smoothness of the relative rotation between the outer sleeve 310 and the inner sleeve 320 can be improved.

Further, as shown in fig. 4 and 9, the outer sleeve ball groove 313 adapted to be engaged with the balls 330 is provided on the inner circumferential surface of the outer sleeve 310, the inner sleeve ball groove 321 adapted to be engaged with the balls 330 is provided on the outer circumferential surface of the inner sleeve 320, and the outer sleeve ball groove 313 and the inner sleeve ball groove 321 are circumferential annular grooves, thereby ensuring the smoothness of the entire rotation of the spray arm 100. The balls 330 are in rolling contact with the outer sleeve ball groove 313 and the inner sleeve ball groove 321, and friction is small. In an exemplary embodiment, the diameters of the outer sleeve ball groove 313 and the inner sleeve ball groove 321 may be equal to the diameter of the ball 330, or may be slightly larger than the diameter of the ball 330, so as to ensure that the ball 330 fits well with the outer sleeve ball groove 313 and the inner sleeve ball groove 321.

Specifically, referring to fig. 6 and 12, the outer sleeve 310 may include: the outer sleeve peripheral wall 311 and the outer sleeve bottom wall 312, the outer sleeve bottom wall 312 is disposed at an end of the outer sleeve peripheral wall 311 away from the spray arm 100, that is, the outer sleeve bottom wall 312 is disposed at a lower end of the outer sleeve peripheral wall 311, the outer sleeve bottom wall 312 extends inward along a radial direction of the outer sleeve peripheral wall 311, and the outer sleeve ball groove 313 is disposed at a junction of the outer sleeve bottom wall 312 and the outer sleeve peripheral wall 311, so that the balls 330 are disposed above the outer sleeve bottom wall 312, and therefore, the outer sleeve bottom wall 312 can protect the balls 330 to a certain extent, and the balls 330 are prevented from being exposed to the outside and affecting the service life of the balls 330.

The spray arm seat 200 is detachably connected with the inner sleeve 320. For example, the spray arm base 200 and the inner sleeve 320 may be detachably connected in a clamping manner, in a threaded manner, in a clamping manner, in a magnetic manner, or the like.

The first embodiment of the present invention, that is, the spray arm base 200 and the inner sleeve 320 are detachably connected by a snap-fit connection, will be described in detail with reference to fig. 1-9 and 16.

The spray arm socket 200 may include: the spray arm seat comprises a spray arm seat body 210 and a spray arm seat flange 220, wherein the spray arm seat flange 220 is arranged below the spray arm seat body 210, the spray arm seat flange 220 extends outwards along the radial direction of the spray arm seat body 210, and the outer diameter of the spray arm seat flange 220 is larger than that of the spray arm seat body 210. The ball assembly 300 is arranged above the spray arm seat flange 220, the spray arm seat body 210 is provided with the spray arm seat buckle 230, the spray arm seat buckle 230 is suitable for being clamped at the top end of the inner sleeve 320, the spray arm seat 200 and the inner sleeve 320 can be reliably connected into a whole by arranging the spray arm seat buckle 230 on the spray arm seat body 210, the spray arm seat 200 and the ball assembly 300 can be conveniently connected and separated, and the spray arm assembly 1000 can be conveniently installed.

The top of spray arm seat body 210 has a plurality of recesses, and the opening direction of recess is parallel with the axis direction of spray arm seat body 210, and spray arm seat buckle 230 upwards extends from the diapire of recess, and the both sides of spray arm seat buckle 230 separate with two lateral walls of recess, guarantees from this that spray arm seat buckle 230 can take place elastic deformation in the recess. The spray arm seat fastener 230 has a hook facing the inner sleeve 320 at the top end, and the hook is adapted to hook on the top end of the inner sleeve 320, thereby limiting the relative axial position of the spray arm seat 200 and the inner sleeve 320.

When the inner socket 320 and the spray arm socket 200 are assembled, the inner circumferential surface of the inner socket 320 presses the hook of the spray arm socket fastener 230 to deform the spray arm socket fastener 230 toward the interior of the spray arm socket body 210, so as to ensure that the spray arm socket fastener 230 can reach the top end of the inner socket 320 (i.e., from the bottom to the top) from the bottom end of the inner socket 320, when the spray arm socket fastener 230 passes over the top end of the inner socket 320, the pressing force applied to the spray arm socket fastener 230 disappears, and under the action of the elastic force of the spray arm socket fastener 230, the spray arm socket fastener 230 approaches the inner socket 320, so that the hook hooks the top end of the inner socket 320.

When the inner sleeve 320 needs to be separated from the spray arm base 200, the spray arm 100 is lifted upwards by force, the hook is squeezed by the top end of the inner sleeve 320, the hook is retracted into the inner sleeve 320, the spray arm 100 is continuously lifted, and the inner sleeve 320 can be separated from the spray arm base 200.

The number of the spray arm socket fasteners 230 at the upper edge of the spray arm socket body 210 may be a plurality (e.g., four), the grooves correspond to the spray arm socket fasteners 230 one to one, and the plurality of spray arm socket fasteners 230 are uniformly arranged along the circumferential direction of the spray arm socket body 210, so that the fastening stability of the spray arm socket fasteners 230 and the inner sleeve 320 may be improved.

A gap is provided between the lower surface of the outer sleeve 310 and the upper surface of the spray arm seat flange 220, the gap is L1, and L1 satisfies the relationship: 0mm < L1 ≦ 1mm, for example, L1 ≦ 0.3mm, L1 ≦ 0.5mm, or L1 ≦ 0.8mm, so that sliding friction due to contact between the lower surface of the outer sleeve bottom wall 312 and the upper surface of the nozzle arm seat flange 220, that is, no friction between the outer sleeve 310 and the nozzle arm seat 200, may be avoided when the nozzle arm 100 and the nozzle arm seat 200 rotate relative to each other, thereby ensuring no sliding contact between the nozzle arm 100 and the nozzle arm seat 200 other than the rolling contact with the balls 330 of the ball assembly 300.

In addition, the gap between the lower surface of the bottom wall 312 of the outer sleeve and the upper surface of the nozzle arm holder flange 220 is small, so that it is possible to prevent leftover food or other contaminants from entering the gap to increase the friction between the nozzle arm 100 and the nozzle arm holder 200 and even to seize the nozzle arm 100, and when the nozzle arm 100 is tilted, the outer sleeve 310 can be rapidly brought into contact with the nozzle arm holder 200, thereby preventing the nozzle arm 100 from being further tilted.

Referring to fig. 10-16, a second embodiment of the present invention is described in detail, in which the spray arm socket 200 is detachably connected to the inner sleeve 320 by a screw connection.

The spray arm socket 200 may include: the spray arm seat comprises a spray arm seat body 210 and a spray arm seat flange 220, wherein the spray arm seat flange 220 is arranged below the spray arm seat body 210, the spray arm seat flange 220 extends outwards along the radial direction of the spray arm seat body 210, and the outer diameter of the spray arm seat flange 220 is larger than that of the spray arm seat body 210, so that the spray arm seat 200 is more stable. The inner circumferential surface of the nozzle holder body 210 has nozzle holder internal threads 250, the outer circumferential surface of the inner sleeve 320 has inner sleeve external threads 322, and the inner sleeve external threads 322 are screwed with the nozzle holder internal threads 250, so that the inner sleeve 320 and the nozzle holder 200 can be reliably connected into a whole, and the inner sleeve 320 and the nozzle holder 200 can be separated by selectively unscrewing the inner sleeve external threads 322 and the nozzle holder internal threads 250. The spray arm seat 200 is connected with the ball assembly 300 through threads, so that the spray arm seat is convenient to disassemble and assemble and is reliable in fixation.

A gap is formed between the lower surface of the outer sleeve 310 and the upper surface of the spray arm base body 210, the gap is L2, and L2 satisfies the following relation: 0mm < L2 ≦ 1mm, for example L2 ≦ 0.3mm, L2 ≦ 0.5mm, or L2 ≦ 0.8 mm. Specifically, since there is a gap between the lower surface of the outer sleeve bottom wall 312 and the upper surface of the nozzle arm holder body 210, it is possible to prevent sliding friction caused by contact between the lower surface of the outer sleeve bottom wall 312 and the upper surface of the nozzle arm holder body 210 when the nozzle arm 100 and the nozzle arm holder 200 rotate relative to each other, that is, there is no friction between the outer sleeve 310 and the nozzle arm holder 200. In addition, the gap between the lower surface of the bottom wall 312 of the outer sleeve and the upper surface of the spray arm holder body 210 is small, so that it is possible to prevent leftover food or other contaminants from entering the gap to increase the friction between the spray arm 100 and the spray arm holder 200 and even to seize the spray arm 100, and when the spray arm 100 is tilted, the outer sleeve 310 can be rapidly brought into contact with the spray arm holder 200, thereby preventing the spray arm 100 from being further tilted.

Referring to fig. 12, the spray arm socket 200 has an inner spray arm socket flange 260, the inner spray arm socket flange 260 extends inward in a radial direction of the spray arm socket body 210, a gap between a lower surface of the inner sleeve 320 and an upper surface of the inner spray arm socket flange 260 is L3, and L3 satisfies the relationship: l3 is more than 0mm and less than or equal to 0.5 mm.

The central axis of the inner sleeve 320 is coincident with the central axis of the inner spray arm seat flange 260, and the inner diameter of the inner sleeve 320 is equal to the inner diameter of the inner spray arm seat flange 260, and the inner sleeve and the inner spray arm seat flange are aligned without abrupt steps, so that the water flow pressure loss can be reduced.

The spray arm seat 200 further has a spray arm seat flange 220, and the spray arm seat flange 220 extends outwards along the radial direction of the spray arm seat body 210, so that the spray arm seat 200 is not prone to tipping, and the support stability of the spray arm seat 200 to the spray arm 100 is improved.

Alternatively, the ball hole 350 is provided at the bottom of the intermediate sleeve 370, as shown in fig. 16, the ball hole 350 is a major arc hole, and a ball taking and placing opening 351 is formed at a bottom notch of the ball hole 350. The balls 330 enter the ball holes 350 through the ball taking and placing holes 351 or come out of the ball holes 350, thereby facilitating the mounting and dismounting of the balls 330 in the ball holes 350.

Optionally, a weakening groove 360 is provided between two adjacent ball holes 350, and by providing the weakening groove 360, the rigidity between two adjacent ball holes 350 may be made smaller, so that the ball holes 350 are easily deformed when the balls 330 are mounted, thereby reducing the difficulty in mounting or dismounting the balls 330. The weakening groove 360 is provided with a weakening groove upright 361 therein, and optionally, the central axis of the weakening groove upright 361 is parallel to the central axis of the intermediate sleeve 370, thereby facilitating the simplification of the processing process of the intermediate sleeve 370. The weakening groove upright column 361 can play a certain strengthening role, so that the weakening groove 360 is prevented from excessively weakening the rigidity of the middle sleeve 370, and the working reliability of the ball assembly 300 is improved.

As shown in fig. 4, 9, 12, 14-15, the positions of the outer sleeve ball groove 313, the inner sleeve ball groove 321, and the ball hole 350 correspond to each other in the central axis direction of the nozzle arm connecting sleeve 120, and the balls 330 are partially disposed in the ball hole 350. The outer side of the balls 330 is in contact with the outer sleeve ball groove 313, and the inner side of the balls 330 is in contact with the inner sleeve ball groove 321, thereby completing the connection of the outer sleeve 310 and the inner sleeve 320, the outer sleeve 310 is fixedly connected with the spray arm 100, the inner sleeve 320 is fixedly connected with the spray arm holder 200, and further completing the indirect connection of the spray arm 100 and the spray arm holder 200. The positions of the outer sleeve ball groove 313, the inner sleeve ball groove 321, and the ball hole 350 correspond to each other, so that when the spray arm 100 rotates, the ball 330 is prevented from being pressed by a different track from the tracks of the outer sleeve ball groove 313 and the inner sleeve ball groove 321, which may result in the spray arm 100 not rotating.

The function of the intermediate sleeve 370 is mainly three points: (1) the ball holes 350 are formed in the middle sleeve 370, and the balls 330 are arranged in the ball holes 350, so that the positions of the balls 330 can be fixed and limited, and the balls 330 are prevented from being accumulated; (2) the food residue is isolated, and the small food residues are prevented from entering the ball groove to cause friction; (3) the spray arm 100 can be isolated from vibration, and the spray arm 100 is prevented from shaking seriously.

Based on the embodiments of fig. 6 and 12, the load-bearing substrate of the present invention can have various modifications, and the modifications fall into the scope of the present invention. Various modifications of the load bearing substrate according to embodiments of the present invention are outlined below with reference to fig. 6 and 12.

For example, in a first embodiment thereof, not shown, the load-bearing substrate may comprise only: an outer sleeve 310 and an inner sleeve 320, the inner sleeve 320 is sleeved on the inner side of the outer sleeve 310, the balls 330 are arranged between the outer sleeve 310 and the inner sleeve 320, namely, compared with the embodiment of fig. 6 and 12, the middle sleeve 370 is reduced, the outer side of the balls 330 is in rolling contact with the outer sleeve ball groove 313 on the inner circumferential surface of the outer sleeve 310, and the inner side of the balls 330 is in rolling contact with the inner sleeve ball groove 321 on the outer circumferential surface of the inner sleeve 320. The outer circumference of the outer sleeve 310 is provided with a ball external thread 340, and the ball external thread 340 is matched with the spray arm internal thread 121 to realize the threaded connection and fixation of the spray arm 100 and the bearing base body.

For example, in a second embodiment thereof, not shown, the load-bearing substrate may comprise only: the outer sleeve 310 and the intermediate sleeve 370 reduce the number of the inner sleeves 320 as compared with the embodiment of fig. 6 and 12, the intermediate sleeve 370 is fitted over the inner side of the outer sleeve 310, the outer sides of the balls 330 are in rolling contact with the outer sleeve ball grooves 313 on the inner circumferential surface of the outer sleeve 310, and the inner sides of the balls 330 are in rolling contact with the spray arm seat ball grooves on the outer circumferential surface of the spray arm seat body 210. The outer circumference of the outer sleeve 310 is provided with a ball external thread 340, and the ball external thread 340 is matched with the spray arm internal thread 121 to realize the threaded connection and fixation of the spray arm 100 and the bearing base body.

For example, in a third embodiment, not shown, the load bearing substrate may comprise only: the inner sleeve 320 and the intermediate sleeve 370, i.e. the outer sleeve 310 is reduced compared to the embodiment of fig. 6 and 12, the intermediate sleeve 370 is sleeved on the outer side of the inner sleeve 320, the spray arm seat body 210 is sleeved on the outer side of the intermediate sleeve 370, the outer side of the balls 330 is in rolling contact with the spray arm seat ball grooves on the inner circumferential surface of the spray arm seat body 210, and the inner side of the balls 330 is in rolling contact with the inner sleeve ball grooves 321 on the outer circumferential surface of the inner sleeve 320. And the outer peripheral surface of the inner sleeve 320 is provided with a ball external thread 340, and the ball external thread 340 is matched with the spray arm internal thread 121 to realize the screw connection and fixation of the spray arm 100 and the bearing base body.

For example, in a fourth embodiment, not shown, the load bearing substrate may comprise only: compared with the embodiment shown in fig. 6 and 12, the intermediate sleeve 370 is formed by reducing the inner sleeve 320 and the outer sleeve 310, and the outer peripheral surface of the intermediate sleeve 370 is provided with a ball external thread 340, and the ball external thread 340 is matched with the spray arm internal thread 121 to realize the screwed connection between the spray arm 100 and the bearing base body.

For example, in a fifth embodiment thereof, not shown, the load bearing substrate may comprise only: the outer sleeve 310, i.e., the embodiment of fig. 6 and 12, reduces the number of the inner sleeve 320 and the middle sleeve 370, the outer side of the balls 330 is in rolling contact with the outer sleeve ball groove 313 on the inner circumferential surface of the outer sleeve 310, and the inner side of the balls 330 is in rolling contact with the arm socket ball groove on the outer circumferential surface of the arm socket body 210. The outer circumference of the outer sleeve 310 is provided with a ball external thread 340, and the ball external thread 340 is matched with the spray arm internal thread 121 to realize the threaded connection and fixation of the spray arm 100 and the bearing base body.

For example, in a sixth embodiment, not shown, the load bearing substrate may comprise only: in the inner sleeve 320, i.e., compared to the embodiment of fig. 6 and 12, the outer sleeve 310 and the middle sleeve 370 are omitted, the spray arm socket body 210 is sleeved on the outer side of the inner sleeve 320, the outer side of the balls 330 is in rolling contact with the spray arm socket ball grooves on the inner circumferential surface of the spray arm socket body 210, and the inner side of the balls 330 is in rolling contact with the inner sleeve ball grooves 321 on the outer circumferential surface of the inner sleeve 320. And the outer peripheral surface of the inner sleeve 320 is provided with a ball external thread 340, and the ball external thread 340 is matched with the spray arm internal thread 121 to realize the screw connection and fixation of the spray arm 100 and the bearing base body.

The washing appliance according to another aspect of the present invention includes the spray arm assembly 1000 of the above embodiment. The washing electric appliance can be a dish washer, and can also be the washing electric appliances that have washing functions such as fruit and vegetable cleaning machine, medical cleaning machine, and its effect is similar with the effect of setting up spray arm subassembly 1000 in the dish washer, and the repeated description is no longer given here.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example" or "some examples" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples described in this specification can be combined and combined by those skilled in the art.

Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims

1. A spray arm assembly, comprising:

a spray arm having a spray arm internal thread;

the spray arm is connected with the spray arm seat, and the spray arm can rotate relative to the spray arm seat;

the ball assembly is arranged at the connection and matching position of the spray arm and the spray arm seat, and a ball external thread matched with the spray arm internal thread is arranged on the ball assembly.

2. The spray arm assembly of claim 1 wherein the ball assembly comprises: the bearing device comprises a bearing base body and a ball, wherein the ball is rotatably arranged on the bearing base body, and the ball external thread is arranged on the bearing base body.

3. The spray arm assembly of claim 2 wherein the carrier substrate comprises:

an outer sleeve disposed outside the ball; or

The inner sleeve is sleeved inside the outer sleeve.

4. The spray arm assembly of claim 2 or 3 wherein the carrier substrate further comprises: the ball bearing structure comprises an intermediate sleeve, wherein a plurality of ball holes are formed in the intermediate sleeve, balls are installed in the ball holes, and the balls protrude from the inner circumferential surface and the outer circumferential surface of the intermediate sleeve in the radial direction of the intermediate sleeve.

5. The spray arm assembly of claim 2 wherein the carrier substrate comprises:

an outer sleeve disposed outside the ball;

the inner sleeve is sleeved inside the outer sleeve;

the middle sleeve is sleeved between the outer sleeve and the inner sleeve, a plurality of ball holes are formed in the middle sleeve, the balls are mounted in the ball holes, and the balls protrude out of the inner circumferential surface and the outer circumferential surface of the middle sleeve in the radial direction of the middle sleeve.

6. The spray arm assembly of claim 5 wherein the outer sleeve has an inner circumferential surface provided with outer sleeve ball grooves adapted to engage the balls, and the inner sleeve has an outer circumferential surface provided with inner sleeve ball grooves adapted to engage the balls, the outer sleeve ball grooves and the inner sleeve ball grooves each being a circumferential annular groove.

7. The spray arm assembly of claim 5 wherein said outer sleeve comprises: the spraying device comprises an outer sleeve peripheral wall and an outer sleeve bottom wall, wherein the outer sleeve bottom wall is arranged at one end, far away from the spraying arm, of the outer sleeve peripheral wall, the outer sleeve bottom wall extends inwards in the radial direction of the outer sleeve peripheral wall, and the balls are arranged above the outer sleeve bottom wall.

8. The spray arm assembly of claim 5 wherein the spray arm socket is removably connected to the inner sleeve.

9. The spray arm assembly of claim 8, wherein the spray arm socket comprises: the spray arm seat body is provided with a spray arm seat buckle, and the spray arm seat buckle is suitable for being clamped at the top end of the inner sleeve.

10. The spray arm assembly of claim 5, wherein the spray arm socket comprises: spray arm seat body and along the radial spray arm seat flange that outwards extends of spray arm seat body, the ball subassembly sets up the top of spray arm seat flange, the clearance between the lower surface of outer sleeve and the upper surface of spray arm seat flange is L1, and L1 satisfies the relational expression: l1 is more than 0mm and less than or equal to 1 mm.

11. The spray arm assembly of claim 9, wherein the spray arm seat body has a plurality of grooves at a top end thereof, the opening direction of the grooves is parallel to the axial direction of the spray arm seat body, the spray arm seat catch extends upward from a bottom wall of the grooves, two sides of the spray arm seat catch are separated from two side walls of the grooves, and the top end of the spray arm seat catch is provided with a hook facing the inner sleeve.

12. The spray arm assembly of claim 8, wherein the spray arm socket comprises: the spray arm seat comprises a spray arm seat body, wherein spray arm seat internal threads are formed in the inner peripheral surface of the spray arm seat body, inner sleeve external threads are formed in the outer peripheral surface of the inner sleeve, and the inner sleeve external threads are in threaded connection with the spray arm seat internal threads.

13. The spray arm assembly of claim 12 wherein a gap between a lower surface of the outer sleeve and an upper surface of the spray arm socket body is L2, and L2 satisfies the relationship: l2 is more than 0mm and less than or equal to 1 mm.

14. The spray arm assembly of any of claims 5-8, wherein the spray arm socket has a spray arm socket body and an inner spray arm socket flange extending radially inward of the spray arm socket body, wherein a gap between a lower surface of the inner sleeve and an upper surface of the inner spray arm socket flange is L3, wherein L3 satisfies the relationship: l3 is more than 0mm and less than or equal to 0.5 mm.

15. The spray arm assembly of any of claims 5-8, wherein the spray arm socket has a spray arm socket body and an inner spray arm socket flange extending radially inward of the spray arm socket body, wherein a central axis of the inner sleeve coincides with a central axis of the inner spray arm socket flange, and wherein an inner diameter of the inner sleeve is equal to an inner diameter of the inner spray arm socket flange.

16. The spray arm assembly of claim 5, wherein the spray arm comprises: the spray arm comprises a spray arm body and a spray arm connecting sleeve, wherein the spray arm connecting sleeve is arranged on the lower side of the spray arm body, the spray arm connecting sleeve is provided with a spray arm cavity communicated with the spray arm body, a spray arm seat cavity communicated with the spray arm cavity is arranged in a spray arm seat, spray arm internal threads are arranged on the inner peripheral surface of the spray arm connecting sleeve, and ball external threads are arranged on the outer peripheral surface of an outer sleeve.

17. The spray arm assembly of claim 4 wherein the ball hole is formed in the bottom of the middle sleeve, the ball hole is a major arc hole and the bottom notch forms a ball access opening.

18. The spray arm assembly of claim 4, wherein a weakening groove is formed between two adjacent ball holes, and a weakening groove column is arranged in the weakening groove.

19. The spray arm assembly of claim 2 wherein the number of balls is an even number.

20. A washing appliance, characterized in that it comprises a spray arm assembly according to any one of claims 1-19.