阅读说明：本技术 喷臂组件及具有其的洗涤电器 (Spray arm assembly and washing electric appliance with same ) 是由 赵利铭 于 2018-08-28 设计创作，主要内容包括：本发明公开了一种喷臂组件及具有其的洗涤电器。该喷臂组件包括：喷臂,所述喷臂具有喷臂外螺纹；喷臂座,喷臂与喷臂座相连,且所述喷臂相对于所述喷臂座可转动；滚珠组件,所述滚珠组件设置在所述喷臂与所述喷臂座的连接配合处,且所述滚珠组件包括：承载基体和滚珠,所述滚珠可转动地设置在所述承载基体上,所述承载基体上设置有与所述喷臂外螺纹配合的滚珠内螺纹。根据本发明的喷臂组件,喷臂与喷臂座之间通过滚珠组件相连,由此可以减小喷臂与喷臂座之间的摩擦力,从而有利于减小水动力损失,此外,还可以减小喷臂组件的高度尺寸,从而为待清洗件的摆放留出了更多的空间,提升了洗涤电器的容量。(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 external thread; the spray arm seat 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 internal thread matched with the spraying arm external 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.)

1. A spray arm assembly, comprising:

a spray arm having a spray arm external 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 internal thread matched with the spraying arm external thread is arranged on the bearing base body.

2. The spray arm assembly of claim 1, 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, and spray arm external threads are arranged on the outer peripheral surface of the spray arm connecting sleeve.

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

the outer sleeve is sleeved outside the spray arm connecting sleeve, and the internal thread of the ball is arranged on the inner circumferential surface of the outer sleeve.

4. The spray arm assembly of claim 3 wherein the carrier substrate further comprises: the middle sleeve is arranged inside the outer 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.

5. The spray arm assembly of claim 3 or 4 wherein the carrier substrate further comprises: the inner sleeve is suitable for being connected with the spray arm seat, and an inner sleeve ball groove suitable for being matched with the balls is formed in the outer peripheral surface of the inner sleeve.

6. The spray arm assembly of claim 3 wherein said outer sleeve has an inner peripheral surface provided with an outer sleeve ball groove adapted to engage said ball, said ball internal thread being disposed above said outer sleeve ball groove.

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

8. The spray arm assembly of claim 7 wherein the inner sleeve has an outer sleeve thread disposed on an outer circumferential surface thereof, and wherein the spray arm socket has an inner sleeve thread disposed on an inner circumferential surface thereof and adapted to mate with the inner sleeve thread, the inner sleeve thread being disposed below the inner sleeve ball groove.

9. The spray arm assembly of claim 7 wherein the spray arm socket is at least partially inside the inner sleeve and a spray arm socket snap is on top of the spray arm socket and adapted to snap onto an upper surface of the inner sleeve.

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

11. 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.

12. The spray arm assembly of claim 3 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.

13. The spray arm assembly of claim 5, wherein the spray arm adapter sleeve comprises: the nozzle comprises a connecting sleeve peripheral wall and a connecting sleeve bottom wall extending inwards in the radial direction of the connecting sleeve peripheral wall, the connecting sleeve bottom wall is arranged at one end, far away from the nozzle arm body, of the connecting sleeve peripheral wall, and the inner sleeve is arranged below the connecting sleeve bottom wall.

14. The spray arm assembly of claim 13 wherein the inner diameter of the nipple bottom wall is equal to the inner diameter of the inner sleeve.

15. The spray arm assembly of claim 13, wherein the gap between the upper surface of the inner sleeve and the lower surface of the connecting sleeve bottom wall is L1, and L1 satisfies the relationship: l1 is more than 0mm and less than or equal to 0.5 mm.

16. The spray arm assembly of claim 5 wherein the spray arm socket has a spray arm socket inlet opening having an inner diameter equal to an inner diameter of the inner sleeve.

17. Washing appliance, characterized in that it comprises a spray arm assembly according to any one of claims 1-16.

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, 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 clearance between spray arm and the spray arm seat great, and when spray arm during operation, the water in the spray arm leaks 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 connection mode directly leads to the upper and lower height dimension of spouting arm seat and spouting arm great, has wasted the inner bag space of washing electrical apparatus 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 external thread; the spray arm seat 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 internal thread matched with the spraying arm external thread is arranged on the bearing base body.

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 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, and spray arm external threads are arranged on the outer peripheral surface of the spray arm connecting sleeve.

Further, the load bearing substrate comprises: the outer sleeve is sleeved outside the spray arm connecting sleeve, and the internal thread of the ball is arranged on the inner circumferential surface of the outer sleeve.

Further, the load-bearing substrate further comprises: 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.

The load bearing substrate further comprises: the inner sleeve is suitable for being connected with the spray arm seat, and an inner sleeve ball groove suitable for being matched with the balls is formed in the outer peripheral surface of the inner sleeve.

Further, an outer sleeve ball groove suitable for being matched with the ball is formed in the inner circumferential surface of the outer sleeve, and the ball internal thread is arranged above the outer sleeve ball groove.

Optionally, the spray arm seat is detachably connected with the inner sleeve.

According to some embodiments of the invention, an inner sleeve external thread is provided on an outer circumferential surface of the inner sleeve, and an inner spray arm socket internal thread adapted to mate with the inner sleeve external thread is provided on an inner circumferential surface of the spray arm socket, the inner sleeve external thread being provided below the inner sleeve ball groove.

According to some embodiments of the invention, the spray arm socket is at least partially located inside the inner sleeve, and a spray arm socket catch is provided on a top of the spray arm socket and adapted to catch on an upper surface of the inner sleeve.

Specifically, the top of spouting the arm seat has a plurality of recesses, the opening direction of recess with the axis direction of spouting the arm seat is parallel, spout the 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 the arm seat buckle is provided with the orientation the trip of inner skleeve.

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

Furthermore, a weakening groove is formed between every two adjacent ball holes, and a weakening groove upright post is arranged in each weakening groove.

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.

Specifically, the spray arm adapter sleeve includes: the nozzle comprises a connecting sleeve peripheral wall and a connecting sleeve bottom wall extending inwards in the radial direction of the connecting sleeve peripheral wall, the connecting sleeve bottom wall is arranged at one end, far away from the nozzle arm body, of the connecting sleeve peripheral wall, and the inner sleeve and the middle sleeve are arranged below the connecting sleeve bottom wall.

Further, the inner diameter of the bottom wall of the connecting sleeve is equal to the inner diameter of the inner sleeve.

Optionally, the spray arm base has a spray arm base water inlet, and an inner diameter of the spray arm base water inlet is equal to an inner diameter of the inner sleeve.

Optionally, a gap between the upper surface of the inner sleeve and the lower surface of the connecting sleeve bottom wall is L1, and L1 satisfies the relation: l1 is more than 0mm and less than or equal to 0.5 mm.

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

Drawings

FIG. 1 is a schematic view of a spray arm assembly;

FIG. 2 is a schematic half-section view of the spray arm assembly;

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

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

FIG. 5 is a schematic half-section view of the ball assembly;

FIG. 6 is an exploded half-section view of the ball assembly at B in FIG. 4;

fig. 7 is a schematic half-section of the intermediate sleeve.

Reference numerals:

spray arm assembly 1000, spray arm 100, spray arm chamber 101, spray arm body 110, spray arm connection sleeve 120, spray arm external thread 121, connection sleeve peripheral wall 122, connection sleeve bottom wall 123, spray arm socket 200, spray arm socket chamber 201, spray arm socket flange 210, spray arm socket internal thread 220, ball assembly 300, load-bearing substrate 310, outer sleeve 311, ball internal thread 3111, outer sleeve ball groove 3112, outer sleeve peripheral wall 3113, outer sleeve bottom wall 3114, inner sleeve 312, inner sleeve ball groove 3121, inner sleeve external thread 3122, middle sleeve 313, ball hole 3131, weakening groove 3132, weakening groove post 3133, ball 320.

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", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not 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 7. 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, a spray arm assembly 1000 according to an embodiment of the present invention may include: spray arm 100, spray arm socket 200 and ball assembly 300.

Referring to fig. 2-4, the spray arm 100 has spray arm external threads 121, which provide possibilities for connecting the spray arm 100 to other components, the spray arm 100 is connected to the spray arm base 200, the spray arm 100 is rotatable relative to the spray arm base 200, the spray arm base 200 is located below the spray arm 100, a connection interface is provided for the spray arm 100 by the spray arm base 200, and meanwhile, after the spray arm 100 is connected to the spray arm base 200 as 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 (not shown in the figures), the spray arm 100 rotates by the reaction force when the water columns are sprayed, the spray arm 100 continuously rotates as the water columns are continuously sprayed from the water spraying hole and the driving hole, the water columns sprayed from the water spraying hole and the driving hole are sprayed to the surface of the tableware or the inner wall of the dishwasher along with the rotation of the spray arm 100, and then the dirt on the tableware or the inner wall of the dishwasher is washed, thereby completing the washing work of the tableware by the dishwasher. 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.

Referring to fig. 4 to 6, the ball assembly 300 is disposed at the coupling engagement of the spray arm 100 and the spray arm socket 200, and the ball assembly 300 may include: the nozzle includes a bearing base 310 and a ball 320, the ball 320 is rotatably disposed on the bearing base 310, and the bearing base 310 is provided with a ball female screw 3111 engaged with the nozzle arm male screw 121.

Specifically, the carrier substrate 310 may be one part or an assembly including a plurality of parts. In the embodiment of the present invention, the carrier substrate 310 is composed of more than one component, and a portion of the carrier substrate 310 is fixedly connected to the spray arm 100, and another portion of the carrier substrate 310 is fixedly connected to the spray arm socket 200, so that the spray arm 100 and the spray arm socket 200 can be indirectly connected. The ball 320 is disposed in the middle of the bearing substrate 310, and the ball 320 can rotate in the bearing substrate 310, so that the relative rotation between the spray arm 100 and the spray arm seat 200 can be realized through the ball 320, and thus the friction form between the spray arm 100 and the spray arm seat 200 can be changed, and the previous sliding friction is changed into rolling friction, which is favorable for reducing the friction force between the spray arm 100 and the spray arm seat 200.

As shown in fig. 2-3 and 6, the ball internal thread 3111 is disposed on the outer part of the bearing substrate 310, and is engaged with the spray arm external thread 121 to fixedly connect the bearing substrate 310 to the spray arm 100 through the engagement between the spray arm external thread 121 and the ball internal thread 3111, and the inner part of the bearing substrate 310 is fixedly connected to the spray arm base 200, wherein the ball 320 is disposed between the inner part and the outer part of the bearing substrate 310, and the inner part and the outer part of the bearing substrate 310 can rotate relatively, so as to ensure the relative rotation of the spray arm 100 and the spray arm base 200, and the connection between the spray arm 100, the spray arm base 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 connected with the spray arm seat 200 through the buckle alone, 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.

According to the spray arm assembly 1000 of the embodiment of the invention, the spray arm external thread 121 is arranged on the outer circumferential surface of the spray arm 100, so as to provide an interface for connecting the spray arm 100 and 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 is higher, and being beneficial to improving the cleaning effect of the dish-washing machine 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.

Referring to fig. 2 to 4, 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 the spray arm chamber 101 which is communicated, and the spray arm seat 200 is internally provided with the spray arm seat chamber 201 which is communicated with the spray arm chamber 101, so that water at a water source of the dish washing machine can smoothly enter the spray arm chamber 101 through the spray arm seat chamber 201, 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 101, the water pressure in the spray arm chamber 101 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 101.

Referring to fig. 5-7, the carrier substrate 310 includes three parts, respectively: an outer sleeve 311 (i.e., the aforementioned outer component of the carrier base 310), an inner sleeve 312 (i.e., the aforementioned inner component of the carrier base 310), and an intermediate sleeve 313.

The outer sleeve 311 is sleeved outside the spray arm connecting sleeve 120, the ball internal thread 3111 is arranged on the inner circumferential surface of the outer sleeve 311, and the spray arm external thread 121 is arranged on the outer circumferential surface of the spray arm connecting sleeve 120, so that the outer sleeve 311 and the spray arm connecting sleeve 120 can be connected into a whole through the matching connection of the ball internal thread 3111 and the spray arm external thread 121, and the bearing base 310 and the spray arm 100 are reliably connected into a whole.

The inner sleeve 312 is disposed inside the outer sleeve 311 and the middle sleeve 313, and the inner sleeve 312 is fixedly connected with the spray arm base 200, so as to ensure that the bearing base 310 and the spray arm base 200 are reliably connected into a whole.

The middle sleeve 313 is disposed between the outer sleeve 311 and the inner sleeve 312, the middle sleeve 313 is provided with a plurality of ball holes 3131, the balls 320 are disposed in the ball holes 3131, and the balls 320 are rotatably mounted in the ball holes 3131, the ball holes 3131 provide support for fixing the balls 320, the relative positions of the balls 320 are ensured to be unchanged, collision and extrusion between the balls 320 are prevented, and therefore, the working stability of the ball assembly 300 can be improved, and the smoothness of the spray arm 100 during rotation can be further improved.

Alternatively, the number of ball holes 3131 is the same as the number of balls 320. The balls 320 protrude from the inner circumferential surface and the outer circumferential surface of the intermediate sleeve 313 in the radial direction of the intermediate sleeve 313, that is, the diameter of the balls 320 is larger than the wall thickness of the intermediate sleeve 313, the balls 320 have only a middle portion installed in the intermediate sleeve 313, the outer side of the balls 320 protrudes outwardly from the outer circumferential surface of the intermediate sleeve 313, and the inner side of the balls 320 protrudes inwardly from the inner circumferential surface of the intermediate sleeve 313, so that the outer side of the balls 320 is in rolling contact with the inner surface of the outer sleeve 311, the inner side of the balls 320 is in rolling contact with the outer surface of the inner sleeve 312, and the balls 320 are in rolling contact with the outer sleeve 311 and the inner sleeve 312, wherein the outer sleeve 311 is fixedly connected with the spray arm 100, and the outer sleeve 312 is fixedly connected with the spray arm holder 200, so that the balls 320 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, so that the spray arm 100 and the spray arm base 200 have rolling friction.

Alternatively, the diameter of the balls 320 is 3mm to 8mm, and the number of the balls 320 is 4 to 12.

Referring to fig. 4 to 6, further, an outer sleeve ball groove 3112 adapted to be engaged with the balls 320 is provided on an inner circumferential surface of the outer sleeve 311, a ball female screw 3111 is provided above the outer sleeve ball groove 3112 to provide a space for the balls 320 to smoothly rotate in the outer sleeve ball groove 3112, an inner sleeve ball groove 3121 adapted to be engaged with the balls 320 is provided on an outer circumferential surface of the inner sleeve 312, and the outer sleeve ball groove 3112 and the inner sleeve ball groove 3121 are circumferential annular grooves, whereby the smoothness of the entire rotation of the spray arm 100 can be ensured. The balls 320 are in rolling contact with the outer sleeve ball groove 3112 and the inner sleeve ball groove 3121, and friction is small. In an exemplary embodiment, the diameters of the outer sleeve ball groove 3112 and the inner sleeve ball groove 3121 may be equal to the diameter of the ball 320, or may be slightly larger than the diameter of the ball 320, thereby ensuring that the ball 320 fits well into the outer sleeve ball groove 3112 and the inner sleeve ball groove 3121.

Referring to fig. 3 to 4, the outer sleeve ball groove 3112, the inner sleeve ball groove 3121, and the ball hole 3131 are positioned to correspond in the central axis direction of the nozzle arm connecting sleeve 120, and the ball 320 is partially disposed in the ball hole 3131. The outer side of the ball 320 is in contact with the outer sleeve ball groove 3112, and the inner side of the ball 320 is in contact with the inner sleeve ball groove 3121, thereby completing the connection of the outer sleeve 311 and the inner sleeve 312, the outer sleeve 311 is fixedly connected with the spray arm 100, the inner sleeve 312 is fixedly connected with the spray arm socket 200, and further completing the indirect connection of the spray arm 100 and the spray arm socket 200. The positions of the outer sleeve ball groove 3112, the inner sleeve ball groove 3121, and the ball hole 3131 correspond to each other, so that when the spray arm 100 rotates, the track along which the balls 320 slide is not pressed by the outer sleeve ball groove 3112 and the inner sleeve ball groove 3121, which prevents the spray arm 100 from being rotated.

In some embodiments, spray arm socket 200 is removably coupled to inner sleeve 312.

Referring to fig. 3 to 4, an inner sleeve external thread 3122 is disposed on an outer circumferential surface of the inner sleeve 312, a spray arm socket internal thread 220 adapted to be matched with the inner sleeve external thread 3122 is disposed on an inner circumferential surface of the spray arm socket 200, the inner sleeve 312 and the spray arm socket 200 are reliably connected into a whole by matching and connecting the inner sleeve external thread 3122 and the spray arm socket internal thread 220, and the spray arm socket 200 and the ball assembly 300 are connected by a thread, so that the assembly and disassembly are convenient and the fixation is reliable. The inner sleeve male screw 3122 is provided below the inner sleeve ball groove 3121 to provide a space for the balls 320 to smoothly rotate in the inner sleeve ball groove 3121.

Referring to fig. 4 and 6, the ball female screw 3111 is disposed above the outer sleeve ball groove 3112, and the inner sleeve male screw 3122 is disposed below the inner sleeve ball groove 3121, so that the fixing position of the outer sleeve 311 to the spray arm 100 is located above, and the fitting position of the inner sleeve 312 to the spray arm socket 200 is located below, thereby making full use of a height space and preventing an axial dimension of the coupling fitting portion of the spray arm 100 to the spray arm socket 200 from being too large.

Referring to fig. 6 to 7, in particular, a ball hole 3131 is provided at the bottom of the middle sleeve 313, the ball hole 3131 is a major arc hole, and a ball taking and placing opening through which the ball 320 enters into or exits from the ball hole 3131 is formed at a bottom gap of the ball hole 3131, thereby facilitating the installation and removal of the ball 320 in the ball hole 3131. The major-arc hole is a hole having a central angle greater than 180 ° and less than 360 °, so that a large portion of each ball 320 is located in the ball hole 3131, preventing the ball 320 from falling out of the ball hole 3131 after the installation is completed. When the ball 320 is installed, the ball taking and placing opening can be opened by means of external force, then the ball 320 is installed in the ball hole 3131 through the ball taking and placing opening, then the external force is removed, the elastic deformation of the ball hole 3131 disappears, the ball hole 3131 is restored to the original state, the ball 320 is tightly wrapped by the ball hole 3131, and the installation of the ball 320 in the ball hole 3131 is firmer and more reliable.

In an exemplary embodiment, the plurality of ball holes 3131 may be uniformly distributed along the circumferential direction of the middle sleeve 313, thereby making the relative rotation of the spray arm 100 and the spray arm socket 200 more smooth. Preferably, the number of the balls 320 is even, so that the ball assembly 300 can be uniformly stressed and the stress concentration phenomenon can be relieved.

Referring to fig. 6 to 7, a weakening groove 3132 is provided between adjacent two ball holes 3131, and rigidity between the adjacent two ball holes 3131 may be made small by providing the weakening groove 3132, whereby the ball hole 3131 is easily deformed when the ball 320 is mounted, thereby reducing difficulty in mounting or dismounting the ball 320.

Weakening groove 3132 is provided with a weakening groove pillar 3133 therein, optionally with the central axis of weakening groove pillar 3133 being parallel to the central axis of intermediate sleeve 313, thereby facilitating a simplified machining process of intermediate sleeve 313. By providing the weakening groove pillar 3133, a certain reinforcement effect can be achieved, so that the rigidity of the middle sleeve 313 is prevented from being excessively weakened by the weakening groove 3132, thereby facilitating improvement of the operational reliability of the ball assembly 300.

The function of the intermediate sleeve 313 is mainly three points: (1) the ball hole 3131 is formed in the middle sleeve 313, and the ball 320 is installed in the ball hole 3131, so that the position of the ball 320 can be fixed and limited, and the ball 320 is 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.

Referring to fig. 5-6, in particular, the outer sleeve 311 may include: an outer sleeve peripheral wall 3113 and an outer sleeve bottom wall 3114, the outer sleeve bottom wall 3114 is disposed at an end of the outer sleeve peripheral wall 3113 away from the spray arm 100, as shown in fig. 3, the outer sleeve bottom wall 3114 is disposed at a lower end of the outer sleeve peripheral wall 3113, the outer sleeve bottom wall 3114 extends inward along a radial direction of the outer sleeve peripheral wall 3113, and the outer sleeve ball groove 3112 is disposed at a junction of the outer sleeve bottom wall 3114 and the outer sleeve peripheral wall 3113, so that the balls 320 are disposed above the outer sleeve bottom wall 3114, and thus, the outer sleeve bottom wall 3114 can protect the balls 320 to prevent the balls 320 from being exposed to the outside and affecting the service life of the balls 320.

Referring to fig. 2-4, further, the top of the spray arm socket 200 has a spray arm socket flange 210, the spray arm socket flange 210 extends radially outward of the spray arm socket 200, the spray arm socket flange 210 is disposed below the outer sleeve bottom wall 3114, and a gap between an upper surface of the spray arm socket flange 210 and a lower surface of the outer sleeve bottom wall 3114 is L2, and L2 satisfies the relationship: 0mm < L2 ≦ 0.5mm, so that sliding friction caused by contact between the lower surface of the outer sleeve bottom wall 3114 and the upper surface of the spray arm seat flange 210, i.e., no friction between the outer sleeve 311 and the spray arm seat 200, can be avoided when the spray arm 100 and the spray arm seat 200 rotate relative to each other. In addition, the gap between the lower surface of the bottom wall 3114 of the outer sleeve and the upper surface of the nozzle arm holder flange 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 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 311 is rapidly brought into contact with the nozzle arm holder 200, thereby preventing the nozzle arm 100 from being further tilted.

For example, in some alternative embodiments, the gap L2 between the upper surface of the spray arm seat flange 210 and the lower surface of the outer sleeve bottom wall 3114 may be 0.1mm, or 0.2mm or 0.3 mm.

Referring to fig. 3 to 5, in particular, the spray arm connecting sleeve 120 may include: the connecting sleeve peripheral wall 122 and the connecting sleeve bottom wall 123, the connecting sleeve bottom wall 123 extends inwards along the radial direction of the connecting sleeve peripheral wall 122, the connecting sleeve bottom wall 123 is arranged at one end of the connecting sleeve peripheral wall 122 far away from the spray arm body 110, as shown in fig. 3, the connecting sleeve bottom wall 123 is arranged at the lower end of the connecting sleeve peripheral wall 122, and the inner sleeve 312 and the intermediate sleeve 313 are arranged below the connecting sleeve bottom wall 123.

Referring to fig. 3, the bottom wall 123 of the connecting sleeve has the same inner diameter as the inner sleeve 312, and is aligned without abrupt steps, thereby avoiding water pressure loss. Meanwhile, when water enters the spray arm connecting sleeve 120 from the inner sleeve 312, the bottom wall 123 of the connecting sleeve can be buffered and transited, and the influence of sudden change of the flow velocity of the water flow on the rotation stability of the spray arm 100 can be avoided. The bottom of spouting arm seat 200 has the inner flange of spouting arm seat, and the inner flange of spouting arm seat is along spouting radial inward extension of arm seat 200, and inner skleeve 312 is located the top of the inner flange of spouting arm seat, and the center of the inner flange of spouting arm seat has a spouting arm seat inlet opening, and the internal diameter of spouting arm seat inlet opening also equals with inner skleeve 312's internal diameter, and both align, and no sudden change step can avoid rivers pressure loss. Meanwhile, when water enters the inner sleeve 312 from the spray arm seat 200, the influence of the sudden change of the water flow speed on the rotation stability of the spray arm 100 can also be avoided.

That is, when the water source of the dishwasher is turned on, the water flow enters from the spray arm base 200 and then flows into the spray arm chamber 101 of the spray arm connecting sleeve 120, therefore, the inner diameter of the connecting sleeve bottom wall 123 is equal to the inner diameter of the inner sleeve 312 and the inner diameter of the water inlet of the spray arm base, which can ensure the equal water flow velocity in the spray arm base 200, the inner sleeve 312 and the connecting sleeve bottom wall 123, and because the difference between the inner diameter of the connecting sleeve bottom wall 123 and the inner diameter of the connecting sleeve peripheral wall 122 is not large, when the water enters the connecting sleeve peripheral wall 122 through the connecting sleeve bottom wall 123, the change of the water flow velocity is small, the water flow velocity of the water flow entering the spray arm chamber 101 is stable, thereby avoiding the serious shaking of the spray arm 100 caused by the drastic change of the water flow velocity, ensuring the stable rising of the water pressure in the spray arm chamber 101, and preventing the abrupt change of the flow, the stable rotation of the spray arm 100 is ensured, and the high operational reliability of the spray arm assembly 1000 is ensured.

The gap between the upper surface of the inner sleeve 312 and the lower surface of the connecting sleeve bottom wall 123 is L1, and L1 satisfies the relation: the L1 is more than 0mm and less than or equal to 0.5mm, therefore, when the spray arm 100 and the spray arm base 200 rotate relatively, the sliding friction caused by the contact between the upper surface of the inner sleeve 312 and the lower surface of the connecting sleeve bottom wall 123 can be avoided, that is, no friction exists between the inner sleeve 312 and the spray arm connecting sleeve 120, in addition, the gap between the upper surface of the inner sleeve 312 and the lower surface of the connecting sleeve bottom wall 123 is small, so that the phenomenon that leftover rice or other pollutants enter the gap to increase the friction force between the spray arm 100 and the spray arm base 200 and even block the spray arm 100 can be avoided, the phenomenon that water excessively enters the gap between the inner sleeve 312 and the connecting sleeve bottom wall 123 to cause hydrodynamic loss can be avoided, and when the spray arm 100 inclines, the inner sleeve 312 can quickly contact with the spray arm connecting sleeve 120, so that the spray arm 100 further inclines.

For example, in some alternative embodiments, the gap L1 between the upper surface of the inner sleeve 312 and the lower surface of the connecting sleeve bottom wall 123 may be 0.1mm, or 0.2mm or 0.3 mm.

After the spray arm 100 is connected with the spray arm base 200 by the ball assembly 300, the height of the spray arm connecting sleeve 120 can be reduced, so that the overall height of the spray arm assembly 1000 is reduced, and more space is reserved for placing tableware.

In a specific embodiment, the balls 320 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 rusting and clamping stagnation of the balls 320, and the plastic balls or stainless steel balls have strong corrosion resistance, and can effectively slow down or even prevent the balls 320 from rusting.

In some embodiments, not shown, the spray arm socket 200 is at least partially inside the inner sleeve 312, and the top of the spray arm socket 200 has a spray arm socket snap that is adapted to snap onto the upper surface of the inner sleeve 312. The spray arm seat buckle is arranged at the top of the spray arm seat 200, so that the spray arm seat 200 and the inner sleeve 312 can be reliably connected into a whole, the spray arm seat 200 and the ball assembly 300 are conveniently connected and separated, and the spray arm assembly 1000 is conveniently installed.

Specifically, the top end of the spray arm seat 200 is provided with a plurality of grooves, the opening direction of the grooves is parallel to the axis direction of the spray arm seat 200, the spray arm seat buckles extend upwards from the bottom wall of the grooves, and the two sides of the spray arm seat buckles are separated from the two side walls of the grooves, so that the spray arm seat buckles can be elastically deformed in the grooves. The top end of the spray arm seat buckle is provided with a hook facing the inner sleeve 312, and the hook is suitable for hooking the top end of the inner sleeve 312, so that the relative axial position of the spray arm seat 200 and the inner sleeve 312 is limited.

When the inner sleeve 312 is assembled with the spray arm base 200, the inner circumferential surface of the inner sleeve 312 presses the hook of the spray arm base buckle, so that the spray arm base buckle deforms towards the inside of the spray arm base 200, the spray arm base buckle is ensured to reach the top end of the inner sleeve 312 (namely from the bottom to the top) from the bottom end of the inner sleeve 312, when the spray arm base buckle passes over the top end of the inner sleeve 312, the pressing force applied to the spray arm base buckle disappears, and under the action of the self elastic force of the spray arm base buckle, the spray arm base buckle approaches to the inner sleeve 312, so that the hook hooks the top end of the inner sleeve 312.

When the inner sleeve 312 needs to be separated from the spray arm base 200, the spray arm 100 is lifted upwards by force, the hook is squeezed at the top end of the inner sleeve 312, the hook is retracted into the inner sleeve 312, the spray arm 100 is continuously lifted, and the inner sleeve 312 can be separated from the spray arm base 200.

Based on the embodiment of fig. 3, the load-bearing substrate 310 of the present invention can have various modifications, and the modifications fall within the scope of the present invention. Various variations of the load bearing substrate 310 according to embodiments of the present invention are summarized below in conjunction with FIG. 3.

For example, in a first embodiment, not shown, the load bearing substrate 310 may comprise only: the outer sleeve 311, i.e., the intermediate sleeve 313 and the inner sleeve 312 are reduced as compared to the embodiment of fig. 3 described above, and the rolling connection of the spray arm connecting sleeve 120 and the spray arm socket 200 can also be achieved by the balls 320 directly engaging the outer sleeve 311 and the spray arm socket 200. At this time, the spray arm socket 200 is provided at an outer circumferential surface thereof with a spray arm socket ball groove adapted to be engaged with the ball 320.

For example, in a second embodiment, not shown, the load bearing substrate 310 may comprise only: the outer sleeve 311 and the intermediate sleeve 313, i.e., the inner sleeve 312 is reduced as compared to the embodiment of fig. 3 described above, and the rolling connection of the spray arm adapter sleeve 120 and the spray arm socket 200 is also achieved by the balls 320 directly engaging the outer sleeve 311 and the spray arm socket 200. At this time, the spray arm socket 200 is provided at an outer circumferential surface thereof with a spray arm socket ball groove adapted to be engaged with the ball 320.

For example, in a third embodiment, not shown, the load bearing substrate 310 may comprise only: the outer sleeve 311 and the inner sleeve 312, i.e., the intermediate sleeve 313 is eliminated as compared to the embodiment of fig. 3 described above, and the rolling connection of the spray arm connecting sleeve 120 and the spray arm socket 200 is also achieved by the balls 320 directly engaging the outer sleeve 311 and the inner sleeve 312.

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.