WO2020042752A1 - Spraying arm assembly and washing electric appliance having same - Google Patents

Abstract

A spraying arm assembly (1000) and a washing electric appliance having same. The spraying arm assembly (1000) comprises: a spraying arm (100), the spraying arm (100) having a spraying arm thread (121); a spraying arm base (200), the spraying arm (100) and the spraying arm base (200) being connected, and the spraying arm (100) being rotatable with respect to the spraying arm base (200); a ball assembly (300), the ball assembly (300) being provided at a position that the spraying arm (100) and the spraying arm base (200) are connected and matched, and the ball assembly (300) comprising a bearing substrate (3100) and a ball (330), the ball (330) being rotatably provided on the bearing substrate (3100), and the bearing substrate (3100) being provided with a ball thread matched with the spraying arm thread (121). The ball assembly (300) enables the form of friction between the spraying arm (100) and the spraying arm base (200) to be rolling friction, the hydrodynamic loss caused by the connection manner using a sliding friction form in the prior art is reduced, and the smoothness at the time of rotation of the spraying arm (100) can be improved and the noise can be lowered.

Description

Spray arm assembly and washing appliance with same

Cross-reference to related applications

This application claims priority from August 28, 2018, with application numbers 201810991115.X, 201821410963.9, 201810990361.3, and 201821401305.3, and the patent application name is "Spray Arm Assembly and Washing Appliance With It".

Technical field

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

Background technique

For the existing spray arm assembly, the main way to connect the spray arm to the spray arm base is through a snap-fit flange and a snap-fit connection, but this connection method will cause a larger gap between the spray arm and the spray arm base. When the spray arm is working, water in the spray arm is easy to leak through the gap, which affects the cleaning effect. In addition, when the spray arm and the spray arm base move relative to each other, the friction mode between the two is sliding friction, so the lost hydrodynamic force is relatively large. On the other hand, the snap-on connection method directly results in a larger size of the spray arm base and the vertical height of the spray arm, which wastes the inner space of the washing appliance and reduces the space for the parts to be cleaned inside the washing appliance.

Summary of the Invention

This application aims to solve at least one of the above-mentioned technical problems in the prior art. Therefore, the present application proposes a spray arm assembly, which can reduce the friction between the spray arm and the spray arm seat.

The present application also proposes a washing appliance having the spray arm assembly.

The spray arm assembly according to the embodiment of the present application includes: a spray arm having a spray arm thread; a spray arm base, the spray arm is connected to the spray arm base, and the spray arm is rotatable relative to the spray arm base; A ball assembly, which is arranged at the connection and cooperation between the spray arm and the spray arm seat, and the ball assembly includes a bearing base and a ball, and the ball is rotatably disposed on the bearing base; The bearing base is provided with a ball thread which is matched with the spray arm thread.

According to the spray arm assembly according to the embodiment of the present application, the spray arm and the spray arm base are connected by a ball assembly, so that the friction between the spray arm and the spray arm base can be reduced, which is beneficial to reduce the hydrodynamic loss. It can also reduce the height dimension of the spray arm assembly, thereby leaving more space for the placement of the parts to be cleaned and increasing the capacity of the washing appliance.

According to some embodiments of the present application, the spray arm thread is a spray arm external thread, and the ball thread is a ball internal thread that cooperates with the spray arm internal thread.

According to some embodiments of the present application, the spray arm includes: a spray arm body and a spray arm connection sleeve, the spray arm connection sleeve is disposed on a lower side of the spray arm body, and the spray arm connection sleeve and the spray arm There is a spray arm chamber in the arm body, and the spray arm seat has a spray arm seat chamber in communication with the spray arm chamber. The spray arm external thread is provided on the outer peripheral surface of the spray arm connection sleeve. .

Further, the bearing base includes: an outer sleeve, the outer sleeve is sleeved on the outside of the spray arm connection sleeve, and the ball internal thread is provided on the inner peripheral surface of the outer sleeve.

Further, the load bearing base further includes: an intermediate sleeve, which is disposed between the outer sleeve and the inner sleeve, wherein the intermediate sleeve is provided with a plurality of ball holes, and Balls are installed in the ball holes.

The load-bearing base further includes: an inner sleeve, which is adapted to be connected with the spray arm seat, and the spray arm seat and the inner sleeve are detachably connected.

Further, an outer sleeve ball groove adapted to cooperate with the ball is provided on an inner peripheral surface of the outer sleeve, and an inner sleeve adapted to cooperate with the ball is provided on an outer peripheral surface of the inner sleeve. Tube ball groove.

According to some embodiments of the present application, an inner sleeve external thread is provided on the outer peripheral surface of the inner sleeve, and a spray suitable for cooperating with the outer thread of the inner sleeve is provided on the inner peripheral surface of the spray arm seat. The arm seat is internally threaded, and the internal sleeve external thread is disposed below the ball groove of the internal sleeve.

According to some embodiments of the present application, the spray arm seat is at least partially located inside the inner sleeve, and a top of the spray arm seat is provided with a spray arm seat buckle, and the spray arm seat buckle is adapted to be locked in The upper surface of the inner sleeve.

Specifically, the top of the spray arm base has a plurality of grooves, and the opening direction of the groove is parallel to the axial direction of the spray arm base, and the spray arm base buckles upward from the bottom wall of the groove. Extending, and two sides of the spray arm seat buckle are separated from two side walls of the groove, and a top end of the spray arm seat buckle is provided with a hook facing the inner sleeve.

Specifically, the ball hole is provided at the bottom of the intermediate sleeve, the ball hole is a superior arc hole, and a ball access opening is formed at the bottom notch.

Further, a weakening groove is provided between two adjacent ball holes, and a weakening groove pillar is provided in the weakening groove.

Specifically, the outer sleeve includes: an outer sleeve peripheral wall and an outer sleeve bottom wall, the outer sleeve bottom wall is disposed at an end of the outer sleeve peripheral wall away from the spray arm, and the jacket The bottom wall of the cylinder extends inward along the radial direction of the peripheral wall of the outer sleeve, and the balls are disposed above the bottom wall of the outer sleeve.

Specifically, the spray arm connection sleeve includes a connection sleeve peripheral wall and a connection sleeve bottom wall extending inwardly along the radial direction of the connection sleeve peripheral wall, and the connection sleeve bottom wall is disposed away from the connection sleeve peripheral wall away from the connection sleeve. At one end of the spray arm body, the inner sleeve and the middle sleeve are disposed below the bottom wall of the connection sleeve.

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

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

Optionally, the gap between the upper surface of the inner sleeve and the lower surface of the bottom wall of the connection sleeve is L1, and L1 satisfies the relationship: 0mm <L1 ≦ 0.5mm.

According to some embodiments of the present application, the spray arm thread is an internal thread of the spray arm, and the carrier base includes: an outer sleeve, an inner sleeve, and the outer sleeve is sleeved on the outside of the inner sleeve. The ball thread is a ball external thread matched with the inner thread of the spray arm, and the ball external thread is disposed on the outer sleeve or the inner sleeve.

According to some embodiments of the present application, the inner sleeve is provided with a plurality of ball holes, the balls are installed in the ball holes, and the ball external threads are provided on the outer peripheral surface of the outer sleeve.

Further, the spray arm base comprises: a spray arm base body, and an outer peripheral surface of the spray arm base body is provided with a spray arm base ball groove adapted to cooperate with the ball.

Further, an outer sleeve ball groove suitable for cooperating with the balls is provided on an inner peripheral surface of the outer sleeve, and the outer sleeve ball groove and the spray arm seat ball groove are both circumferential annular grooves. .

Specifically, the outer sleeve includes: an outer sleeve peripheral wall and an outer sleeve bottom wall, the outer sleeve bottom wall is disposed at an end of the outer sleeve peripheral wall away from the spray arm, and the jacket The bottom wall of the cylinder extends inward along the radial direction of the peripheral wall of the outer sleeve, and the balls are disposed above the bottom wall of the outer sleeve.

Optionally, the spray arm base further includes: a spray arm base flange extending outward in a radial direction of the spray arm base body, and the spray arm base flange is disposed below the spray arm base body, A plurality of ribs are provided between the outer peripheral surface of the spray arm base body and the spray arm base flange, and the bottom wall of the outer sleeve is disposed above the ribs.

According to some embodiments of the present application, the ball hole is provided at the bottom of the inner sleeve, the ball hole is a superior arc hole, and a ball access opening is formed at the bottom gap.

Further, a weakening groove is provided between two adjacent ball holes, and a weakening groove pillar is provided in the weakening groove.

According to some embodiments of the present application, the outer sleeve is provided with a plurality of ball holes, the balls are installed in the ball holes, and the ball external threads are provided on the outer peripheral surface of the inner sleeve.

Specifically, the spray arm base includes: a spray arm base water inlet shaft, a spray arm base peripheral wall, and a spray arm base ring wall disposed between the spray arm base water inlet shaft and the spray arm base peripheral wall, the The spray arm seat peripheral wall is disposed above the spray arm seat ring wall, the spray arm seat water inlet shaft is disposed below the spray arm seat ring wall, and the space surrounded by the spray arm seat peripheral wall is formed to be suitable for receiving The accommodating space of the ball assembly is located above the annular wall of the spray arm seat.

The inner diameter of the water inlet shaft of the spray arm seat is equal to the inner diameter of the inner sleeve.

Further, an inner sleeve ball groove adapted to cooperate with the ball is provided on an outer peripheral surface of the inner sleeve, and a spray nozzle adapted to cooperate with the ball is provided on an inner peripheral surface of a peripheral wall of the spray arm seat. The arm seat ball groove, the inner sleeve ball groove and the spray arm seat ball groove are all circumferential annular grooves.

Further, the inner sleeve and the outer sleeve are disposed above the spray arm seat ring wall, and a gap between the lower surface of the inner sleeve and the upper surface of the spray arm seat ring wall Is L1, and L1 satisfies the relationship: 0mm <L1≤0.5mm.

Optionally, a rib is provided between the outer peripheral surface of the water inlet shaft of the spray arm seat and the annular wall of the spray arm seat.

According to some embodiments of the present application, the spray arm includes: a spray arm body and a spray arm connection sleeve, the spray arm connection sleeve is disposed on a lower side of the spray arm body, and the spray arm connection sleeve and the spray arm There is a spray arm chamber in the arm body, and the spray arm seat has a spray arm seat chamber in communication with the spray arm chamber. The spray arm internal thread is provided on the inner periphery of the spray arm connection sleeve. surface.

A washing appliance according to another embodiment of the present application includes the above-mentioned spray arm assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic diagram of a third embodiment of a spray arm assembly;

2 is a schematic half sectional view of a third embodiment of the spray arm assembly;

FIG. 3 is a partially enlarged view at P in FIG. 3; FIG.

4 is an exploded schematic view of a third embodiment of the spray arm assembly;

5 is a schematic half sectional view of a third embodiment of the ball assembly;

6 is an exploded half-section schematic diagram of the ball assembly at Q in FIG. 4;

FIG. 7 is a schematic half cross-sectional view of an intermediate sleeve.

8 is a schematic perspective view of a first embodiment of a spray arm assembly;

FIG. 9 is a schematic half perspective view of a first embodiment of a spray arm assembly; FIG.

10 is a schematic half sectional view of a first embodiment of a spray arm assembly;

FIG. 11 is a partially enlarged view at A in FIG. 10; FIG.

Figure 12 is a schematic assembly diagram of the ball assembly and the spray arm seat;

13 is an exploded schematic view of a ball assembly and a spray arm base;

14 is a schematic perspective view of a half-section of the ball assembly and the spray arm seat;

FIG. 15 is a schematic half sectional view of a ball assembly and a spray arm seat; FIG.

16 is a schematic half sectional view of a second embodiment of the spray arm assembly;

FIG. 17 is a partially enlarged view of a portion B in FIG. 16; FIG.

FIG. 18 is an exploded view of the first embodiment of the spray arm assembly.

Reference signs:

Spray arm assembly 1000, spray arm 100, spray arm chamber 130, 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 seat 200, spray arm Seat cavity 280, spray arm seat flange 220, spray arm seat internal thread 2200, ball assembly 300, load base 3100, outer sleeve 310, ball internal thread 3111, outer sleeve ball groove 313, outer sleeve peripheral wall 311, Outer sleeve bottom wall 312, inner sleeve 320, inner sleeve ball groove 321, inner sleeve external thread 3122, intermediate sleeve 370, ball hole 350, weakening groove 360, weakening groove post 361, ball 330, spray arm inside Thread 121, spray arm base body 210, rib plate 230, spray arm base inlet shaft 240, spray arm base peripheral wall 250, spray arm base ring wall 260, spray arm base ball groove 270, ball external thread 340.

detailed description

Hereinafter, embodiments of the present application will be described in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary, and are intended to explain the present application, and should not be construed as limiting the present application.

In the description of this application, it needs to be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", " The orientations or positional relationships indicated by "left", "right", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing this application and simplifying The description, rather than indicating or implying, the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on this application.

In this application, the terms "installation," "connected," "connected," and "fixed" should be broadly understood unless otherwise specified and limited. For example, they can be fixed connections or removable connections. , Or integrated; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of the two elements or the interaction between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

The spray arm assembly 1000 according to the embodiment of the present application will be described in detail below with reference to FIGS. 1 to 18. The spray arm assembly 1000 can be used in washing appliances. The structure of the spray arm assembly 1000 will be described below using the spray arm assembly 1000 in a dishwasher as an example.

Referring to FIGS. 1 and 8, the spray arm assembly 1000 according to the embodiment of the present application may include: a spray arm 100, a spray arm base 200, and a ball assembly 300.

The spray arm 100 has a spray arm thread, which provides a possibility for the connection of the spray arm 100 and other components. The spray arm 100 is connected to the spray arm base 200, and the spray arm 100 is rotatable relative to the spray arm base 200, and the spray arm base 200 is located in the spray Below the arm 100, the spray arm base 200 is provided to provide a connection interface for the spray arm 100. At the same time, 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 the water inlet pipe of the spray arm 100 . In some embodiments, the spray arm 100 is provided with a water spray hole and a drive hole. When the water pressure in the spray arm 100 reaches a certain value, the spray arm 100 starts to pass through the water spray hole and the drive hole (not shown in the figure) The water column is ejected, and the spray arm 100 is rotated by the reaction force when the water column is ejected. As the water column is continuously ejected from the water spray hole and the drive hole, the spray arm 100 is continuously rotated and sprayed from the water spray hole and the drive hole. With the rotation of the spray arm 100, the water column will be sprayed onto the surface of the dishware or the inner wall of the dishwasher, and the dirt on the dishware or the inner wall of the dishwasher will be washed, thereby completing the dishwashing work of the dishwasher. The direction and position of the water column sprayed by the spray arm 100 on the tableware are multi-directional, which reduces the dead angle and is easier to clean. Due to the large coverage of the water flow, the cleaning time will be correspondingly reduced, which is beneficial to shorten the cleaning time.

The ball assembly 300 is disposed at the joint between the spray arm 100 and the spray arm base 200, and the ball assembly 300 may include a bearing base 3100 and a ball 320. The ball 320 is rotatably disposed on the bearing base 3100, and the bearing base 3100 is provided with Ball threads that mate with the spray arm threads. Specifically, the carrier base 3100 may be a single part, or may be a component including a plurality of parts. In the embodiment of the present application, the carrier base 3100 is composed of more than one component, and a part of the carrier base 3100 is fixedly connected to the spray arm 100, and another part of the carrier base 3100 is fixedly connected to the spray arm base 200, so that spraying can be achieved. The arm 100 is indirectly connected to the spray arm base 200. The ball 320 is disposed in the middle of the carrier base 3100, and the ball 320 can rotate in the carrier base 3100. The relative rotation between the spray arm 100 and the spray arm base 200 can be achieved through the ball 320, so that the spray arm 100 and the spray arm base can be changed. The form of friction between 200 changes from the previous sliding friction to rolling friction, which is beneficial to reducing the friction between the spray arm 100 and the spray arm base 200.

By setting the ball assembly 300, when the spray arm 100 and the spray arm base 200 rotate relative to each other, the friction form between the spray arm 100 and the spray arm base 200 is rolling friction, which is no longer the previous sliding friction. In this way, the rolling friction force The resistance to the spray arm 100 when rotating is small, so the hydrodynamic loss due to friction can be reduced, and the utilization rate of the hydrodynamic force can be improved. At the same time, the speed of the spray arm 100 relative to the spray arm base 200 is relatively high. Therefore, by providing the ball assembly 300, the smoothness of the spray arm 100 during rotation can be improved, thereby reducing the noise of the dishwasher.

In addition, compared with the original form in which the spray arm 100 and the spray arm base 200 are connected by a snap, the spray arm 100 and the spray arm base 200 are connected by a ball assembly 300, which can reduce the spray arm 100 and the spray arm base 200. The distance between them reduces the height dimension of the spray arm assembly 1000, saves the internal space of the dishwasher, and leaves more space for the tableware, thereby increasing the dishware capacity of the dishwasher. Increase the internal load of the dishwasher by 10mm-40mm.

The spray arm 100 and the ball assembly 300 are connected by threads, which is convenient for disassembly and fixing.

According to the spray arm assembly 1000 in the embodiment of the present application, the spray arm thread is provided on the spray arm 100, and provides an interface for the connection between the spray arm 100 and the ball assembly 300. The spray arm 100 and the spray arm base 200 are connected through the ball assembly 300 Therefore, the friction between the spray arm 100 and the spray arm base 200 can be reduced, which is conducive to reducing the hydrodynamic loss, improving the utilization rate of the hydrodynamic force, and ensuring that the pressure when the water is sprayed from the spray hole of the spray arm Large, is conducive to improving the washing effect of dishwashers on dishes. In addition, the height dimension of the spray arm assembly 1000 can also be reduced, thereby saving the internal space of the dishwasher, leaving more space for tableware placement, and increasing the dishware capacity of the dishwasher.

The spray arm assembly 1000 according to the embodiment of the present application is described in detail below with reference to FIGS. 1 to 7.

Referring to FIGS. 4-6, the spray arm thread is the spray arm external thread 121, the ball thread is the ball internal thread 3111 matched with the spray arm internal thread 121, and the bearing base 3100 is provided with a ball matched with the spray arm external thread 121. Internal thread 3111.

That is, the external parts of the bearing base 3100 are provided with ball internal threads 3111 that cooperate with the spray arm external threads 121, as shown in FIGS. 2-3, and 6, the ball internal threads 3111 are provided on the external parts of the bearing base 3100. On the inner peripheral surface, the external thread 121 of the spray arm and the internal thread 3111 of the ball cooperate to realize the fixed connection of the bearing base 3100 and the spray arm 100, and the internal parts of the load base 3100 are fixedly connected to the spray arm seat 200. The ball 330 is provided on the bearing Between the internal parts and external parts of the base body 3100, the internal parts and external parts of the bearing base 3100 can be relatively rotated, thereby ensuring that the spray arm 100, the spray arm base 200 can be relatively rotated, the spray arm 100, the spray arm base 200, and the ball assembly 300. The structure of the three connections is simple and stable.

Referring to FIGS. 2 to 4, the spray arm 100 may include: a spray arm body 110 and a spray arm connection sleeve 120, the spray arm connection sleeve 120 is disposed on the lower side of the spray arm body 110, and the spray arm connection sleeve 120 is provided for convenience The spray arm 100 is connected to the spray arm base 200, which ensures that the spray arm 100 and the spray arm base 200 can be reliably connected as a whole.

The spray arm connecting sleeve 120 and the spray arm body 110 have a spray arm chamber 130 in communication, and the spray arm seat 200 has a spray arm chamber 280 in communication with the spray arm chamber 130, thereby ensuring the water supply of the dishwasher. The water can smoothly enter the spray arm chamber 130 through the spray arm seat chamber 280, and then the water is sprayed onto the surface of the dishware through the spray holes and drive holes on the spray arm 100, thereby completing the operation of washing the tableware. As the water continuously enters the spray arm chamber 130, the water pressure in the spray arm chamber 130 becomes higher and higher. At this time, the reaction force generated by the water column sprayed from the driving hole of the spray arm 100 is also greater, and the spray arm 100 The faster the rotation speed, the greater the force of the sprayed water on the tableware, which is conducive to cleaning the stains on the tableware. Therefore, by setting the spray arm chamber 130, the washing effect of the dishwasher can be better. .

Referring to FIGS. 5-7, the load-bearing base 3100 includes three parts, which are: an outer sleeve 310 (that is, the external parts of the load-bearing base 3100 mentioned above), and an inner sleeve 320 (that is, the load-bearing base 3100 mentioned earlier). Internal parts) and intermediate sleeve 370.

Among them, the outer sleeve 310 is sleeved outside the spray arm connection sleeve 120, the ball internal thread 3111 is provided on the inner peripheral surface of the outer sleeve 310, and the spray arm external thread 121 is provided on the outer peripheral surface of the spray arm connection sleeve 120. By matching the internal thread 3111 of the ball with the external thread 121 of the spray arm, the outer sleeve 310 and the spray arm connection sleeve 120 can be connected as a whole, thereby ensuring that the load bearing base 3100 and the spray arm 100 are reliably connected as a whole.

The inner sleeve 320 is disposed inside the outer sleeve 310 and the middle sleeve 370. The inner sleeve 320 is fixedly connected to the spray arm base 200 through the inner sleeve 320 to ensure that the supporting base 3100 and the spray arm base 200 are reliably connected as a whole.

The middle sleeve 370 is provided between the outer sleeve 310 and the inner sleeve 320. The middle sleeve 370 is provided with a plurality of ball holes 350, the ball 330 is provided in the ball hole 350, and the ball 330 is rotatably installed in the ball hole 350. The ball holes 350 provide support for the fixing of the ball 330, ensure that the relative positions of the plurality of balls 330 remain unchanged, and prevent collisions and squeezing between the plurality of balls 330, thereby improving the working stability of the ball assembly 300, thereby The smoothness of the spray arm 100 can be further improved.

Optionally, the number of the ball holes 350 is the same as the number of the balls 330. The ball 330 protrudes from the inner peripheral surface and the outer peripheral surface of the intermediate sleeve 370 in the radial direction of the intermediate sleeve 370. That is, the diameter of the ball 330 is larger than the wall thickness of the intermediate sleeve 370. In the middle sleeve 370, the outer side of the ball 330 protrudes outward from the outer peripheral surface of the middle sleeve 370, and the inner side of the ball 330 protrudes from the inner peripheral surface of the middle sleeve 370 inward. The inner surface of 310 is in rolling contact. The inner side of ball 330 can be in rolling contact with the outer surface of inner sleeve 320. The ball 330 is in rolling contact with outer sleeve 310 and inner sleeve 320. Among them, outer sleeve 310 and spray The arm 100 is fixedly connected, and the inner sleeve 320 is fixedly connected to the spray arm base 200. Therefore, the ball 330 indirectly provides support for the connection between the spray arm 100 and the spray arm base 200. When the spray arm 100 and the spray arm base 200 are relatively rotated, The spray arm 100 and the spray arm base 200 are indirectly contacted through the balls 330, so there is rolling friction between the spray arm 100 and the spray arm base 200.

Optionally, the diameter of the balls 330 is 3mm-8mm, and the number of the balls 330 is 4-12.

Referring to FIG. 4 to FIG. 6, further, an outer sleeve ball groove 313 suitable for cooperating with the ball 330 is provided on an inner peripheral surface of the outer sleeve 310, and a ball internal thread 3111 is provided above the outer sleeve ball groove 313. Provides space for the ball 330 to smoothly rotate in the outer sleeve ball groove 313. The outer sleeve surface of the inner sleeve 320 is provided with an inner sleeve ball groove 321 suitable for cooperation with the ball 330. The outer sleeve ball groove 313, inner The sleeve ball groove 321 is a circumferential annular groove, thereby ensuring the smoothness of the entire rotation of the spray arm 100. The ball 330 is in rolling contact with the outer sleeve ball groove 313 and the inner sleeve ball groove 321, and the friction force is small. In a specific embodiment, the diameter 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, thereby ensuring the ball 330 and the outer sleeve ball The grooves 313 and the inner sleeve ball grooves 321 are well matched.

As shown in FIGS. 3-4, in the center axis direction of the spray arm connecting sleeve 120, the positions of the outer sleeve ball groove 313, the inner sleeve ball groove 321, and the ball hole 350 correspond, and the ball 330 is partially disposed on the ball Hole 350. The outer side of the ball 330 is in contact with the outer sleeve ball groove 313, and the inner side of the ball 330 is in contact with the inner sleeve ball groove 321, thereby completing the connection between the outer sleeve 310 and the inner sleeve 320, and the outer sleeve 310 and the spray arm 100 are in turn Fixedly connected, the inner sleeve 320 is fixedly connected to the spray arm base 200 again, thereby completing the indirect connection of the spray arm 100 and the spray arm base 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, which can prevent the track of the ball 330 from sliding when the spray arm 100 rotates, and the outer sleeve ball groove 313 and the inner sleeve ball groove 321 The trajectories are different, thereby being squeezed, which makes the spray arm 100 unable to rotate.

In some embodiments, the spray arm seat 200 and the inner sleeve 320 are detachably connected.

Referring to FIGS. 3-4, an inner sleeve external thread 3122 is provided on the outer peripheral surface of the inner sleeve 320, and a spray arm adapted to cooperate with the inner sleeve external thread 3122 is provided on the inner peripheral surface of the spray arm seat 200. The internal thread 2200 of the seat is connected with the internal thread 2200 of the spray arm seat through the external thread 3122 of the inner sleeve. The internal sleeve 320 and the spray arm seat 200 are reliably connected as a whole. The thread between the spray arm seat 200 and the ball assembly 300 is threaded. It is connected for easy disassembly and fixing. The inner sleeve external thread 3122 is disposed below the inner sleeve ball groove 321, and provides space for the ball 330 to smoothly rotate the inner sleeve ball groove 321.

Referring to FIG. 4 and FIG. 6, the ball internal thread 3111 is disposed above the outer sleeve ball groove 313, and the inner sleeve external thread 3122 is disposed below the inner sleeve ball groove 321. Therefore, the outer sleeve 310 and the spray arm 100 The fixed position is located above, and the matching position of the inner sleeve 320 and the spray arm base 200 is located below, thereby making full use of the height space to prevent the axial dimension of the joint between the spray arm 100 and the spray arm base 200 from being too large.

Referring to FIG. 6 to FIG. 7, specifically, the ball hole 350 is disposed at the bottom of the intermediate sleeve 370, the ball hole 350 is an excellent arc hole, and a ball access opening is formed at the bottom gap of the ball hole 350, and the ball 330 passes through the ball The access port enters or exits from the ball hole 350, thereby facilitating the installation and removal of the ball 330 in the ball hole 350. The superior arc hole is a hole with a center angle greater than 180 ° and less than 360 °, so that most of each ball 330 can be located in the ball hole 350 to prevent the ball 330 from falling out of the ball hole 350 after installation. When installing the ball 330, the ball access opening can be opened by external force, and then the ball 330 is installed in the ball hole 350 through the ball access opening, and then the external force is removed, and the elastic deformation of the ball hole 350 disappears, and the ball hole 350 The original state is restored. At this time, the ball hole 350 tightly wraps the ball 330, so that the installation of the ball 330 in the ball hole 350 is more firm and reliable.

In a specific embodiment, the plurality of ball holes 350 may be uniformly distributed along the circumferential direction of the intermediate sleeve 370, so that the relative rotation of the spray arm 100 and the spray arm base 200 may be more stable. Preferably, the number of the balls 330 is an even number, so that the force of the ball assembly 300 can be balanced and the stress concentration phenomenon can be alleviated.

Referring to FIG. 6 to FIG. 7, a weakening groove 360 is provided between two adjacent ball holes 350. By providing a weakening groove 360, the rigidity between two adjacent ball holes 350 can be made smaller, thereby When the ball 330 is installed, the ball hole 350 is easily deformed, thereby reducing the difficulty of installing or removing the ball 330.

A weakening groove column 361 is provided in the weakening groove 360. Optionally, the central axis of the weakening groove column 361 is parallel to the central axis of the intermediate sleeve 370, thereby facilitating the processing of the intermediate sleeve 370. By providing the weakening groove column 361, a certain strengthening effect can be played, thereby preventing the weakening groove 360 from excessively weakening the rigidity of the intermediate sleeve 370, which is beneficial to improving the working reliability of the ball assembly 300.

The role of the intermediate sleeve 370 mainly has three points: (1) By opening the ball hole 350 in the intermediate sleeve 370 and installing the ball 330 in the ball hole 350, the position of the ball 330 can be fixed and limited to prevent the ball 330 from accumulating. (2) play a role in isolating food residues, prevent small food residues from entering the ball grooves, causing friction; (3) play a strengthening role, and can isolate the spray arm 100 vibration, to prevent the spray arm 100 from shaking seriously.

5 to 6, specifically, the outer sleeve 310 may include: an outer sleeve peripheral wall 311 and an outer sleeve bottom wall 312. The outer sleeve bottom wall 312 is disposed on the outer sleeve peripheral wall 311 away from the spray arm 100. One end, as shown in FIG. 3, the outer sleeve bottom wall 312 is disposed at the lower end of the outer sleeve peripheral wall 311, and the outer sleeve bottom wall 312 extends inward along the radial direction of the outer sleeve peripheral wall 311, and the outer sleeve ball groove 313 is provided At the boundary between the outer sleeve bottom wall 312 and the outer sleeve peripheral wall 311, in this way, the ball 330 is disposed above the outer sleeve bottom wall 312, so that the outer sleeve bottom wall 312 can protect the ball 330 to prevent The exposure of the ball 330 to the outside affects the service life of the ball 330.

Referring to FIGS. 2 to 4, further, the top of the spray arm base 200 has a spray arm base flange 220, the spray arm base flange 220 extends outward in the radial direction of the spray arm base 200, and the spray arm base flange 220 It is set below the outer sleeve bottom wall 312, and the gap between the upper surface of the spray arm seat flange 220 and the lower surface of the outer sleeve bottom wall 312 is L2, and L2 satisfies the relationship: 0mm <L2≤0.5mm Therefore, when the spray arm 100 and the spray arm base 200 rotate relatively, it is possible to avoid sliding friction between the lower surface of the outer sleeve bottom wall 312 and the upper surface of the spray arm base flange 220, that is, the outer There is no friction between the sleeve 310 and the spray arm base 200. In addition, the gap between the lower surface of the outer sleeve bottom wall 312 and the upper surface of the spray arm base flange 220 is small, which can prevent leftovers or other contaminants from entering the gap and increase the gap between the spray arm 100 and the spray arm base 200. The friction force even stuck the spray arm 100, and when the spray arm 100 was tilted, the outer sleeve 310 could quickly contact the spray arm base 200, thereby preventing the spray arm 100 from further tilting.

For example, in some optional embodiments, the gap L2 between the upper surface of the spray arm seat flange 220 and the lower surface of the outer sleeve bottom wall 312 may be 0.1 mm, or 0.2 mm or 0.3 mm.

Referring to FIGS. 3-5, specifically, the spray arm connection sleeve 120 may include: a connection sleeve peripheral wall 122 and a connection sleeve bottom wall 123. The connection sleeve bottom wall 123 extends inward along the radial direction of the connection sleeve peripheral wall 122, and the connection sleeve The bottom wall 123 is disposed at an end of the connection sleeve peripheral wall 122 far from the spray arm body 110. As shown in FIG. 3, the connection sleeve bottom wall 123 is disposed at the lower end of the connection sleeve peripheral wall 122, and the inner sleeve 320 and the intermediate sleeve 370 are disposed at the connection. Cover the bottom of the bottom wall 123.

As shown in FIG. 3, the inner diameter of the bottom wall 123 of the connection sleeve is equal to the inner diameter of the inner sleeve 320, and the two are aligned, there are no abrupt steps, and water pressure loss can be avoided. At the same time, when water enters the spray arm connection sleeve 120 from the inner sleeve 320, buffering and transition can be performed at the bottom wall 123 of the connection sleeve, which can avoid sudden changes in water flow velocity and affect the rotation stability of the spray arm 100. The bottom of the spray arm base 200 has an inner flange of the spray arm base, the inner flange of the spray arm base extends inward in the radial direction of the spray arm base 200, and the inner sleeve 320 is located above the inner flange of the spray arm base, inside the spray arm base The center of the flange has a water inlet hole of the spray arm seat, and the inner diameter of the water inlet hole of the spray arm seat is also equal to the inner diameter of the inner sleeve 320. The two are aligned and there are no abrupt steps to avoid water pressure loss. At the same time, when water enters the inner sleeve 320 from the spray arm base 200, the sudden change of the water flow velocity can also be avoided to affect the rotation stability of the spray arm 100.

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 130 of the spray arm connection sleeve 120. Therefore, the inner diameter of the bottom wall 123 of the connection sleeve and the inner sleeve The inner diameter of the cylinder 320 and the inner diameter of the water inlet hole of the spray arm seat can be equal, which can ensure that the water flow velocity in the spray arm seat 200, the inner sleeve 320 and the bottom wall 123 of the connection sleeve is equal, and because the inner diameter of the bottom wall 123 of the connection sleeve and the connection sleeve The inner diameter of the peripheral wall 122 is not much different, so when water enters the connecting sleeve peripheral wall 122 through the bottom wall 123 of the connection sleeve, the change of the water flow speed is small, and the water flow velocity entering the spray arm chamber 130 is stable, thereby avoiding a drastic change in the water flow speed. Causes the spray arm 100 to shake severely, ensuring that the water pressure in the spray arm chamber 130 rises steadily, and prevents the flow velocity at the connection between the spray arm seat 200 and the inner sleeve 320, and the connection between the inner sleeve 320 and the spray arm connection sleeve 120. The sudden change ensures that the spray arm 100 can rotate stably, thereby ensuring the high reliability of the spray arm assembly 1000.

The gap between the upper surface of the inner sleeve 320 and the lower surface of the bottom wall 123 of the connection sleeve is L1, and L1 satisfies the relationship: 0mm <L1 ≤ 0.5mm. Therefore, the spray arm 100 and the spray arm base 200 rotate relatively In this case, sliding friction between the upper surface of the inner sleeve 320 and the lower surface of the bottom wall 123 of the connection sleeve can be avoided, that is, there is no friction between the inner sleeve 320 and the spray arm connection sleeve 120. In addition, the inner The gap between the upper surface of the sleeve 320 and the lower surface of the bottom wall 123 of the connecting sleeve is small, which can prevent leftovers or other contaminants from entering the gap and increase the friction between the spray arm 100 and the spray arm seat 200 and even become stuck. The spray arm 100 can also avoid hydrodynamic loss caused by excessive water entering between the inner sleeve 320 and the bottom wall 123 of the connection sleeve, and when the spray arm 100 is tilted, the inner sleeve 320 can quickly connect with the spray arm connection sleeve 120 Contact, thereby preventing the spray arm 100 from further tilting.

For example, in some optional embodiments, the gap L1 between the upper surface of the inner sleeve 320 and the lower surface of the bottom wall 123 of the connection sleeve may be 0.1 mm, or 0.2 mm or 0.3 mm.

After the spray arm 100 and the spray arm base 200 are connected by using the ball assembly 300, the height dimension of the spray arm connection sleeve 120 can be reduced, thereby reducing the overall height dimension of the spray arm assembly 1000, leaving room for tableware More space.

In a specific embodiment, the ball 330 may be a plastic ball or a stainless steel ball, because the working environment of the spray arm assembly 1000 is filled with water, and the spray arm assembly 1000 has been in a hot and humid environment for a long time, which may cause the ball 330 to rust and jam, and the plastic ball or stainless steel The ball has a strong anti-corrosion ability, which can effectively slow down or even prevent the ball 330 from rusting.

In some non-illustrated embodiments, the spray arm base 200 is at least partially located inside the inner sleeve 320, and the top of the spray arm base 200 is provided with a spray arm base buckle, and the spray arm base buckle is adapted to be clamped to the inner sleeve. The top surface of 320. By setting the spray arm base buckle on the top of the spray arm base 200, the spray arm base 200 and the inner sleeve 320 can be reliably connected as a whole, and the spray arm base 200 and the ball assembly 300 can be connected and disconnected, which is convenient for the spray arm. Installation of component 1000.

Specifically, the top of the spray arm base 200 has a plurality of grooves, the opening direction of the groove is parallel to the axis direction of the spray arm base 200, the spray arm base buckle extends upward from the bottom wall of the groove, and the spray arm base buckle The two sides of the groove are separated from the two side walls of the groove, thereby ensuring that the spray arm seat buckle can be elastically deformed in the groove. The top of the spray arm base buckle is provided with a hook facing the inner sleeve 320, and the hook is adapted to hook the top of the inner sleeve 320, thereby limiting the relative axial position of the spray arm base 200 and the inner sleeve 320.

When assembling the inner sleeve 320 and the spray arm base 200, the inner peripheral surface of the inner sleeve 320 presses the hook of the spray arm base buckle, so that the spray arm base buckle is deformed toward the interior of the spray arm base 200 to ensure spraying. The arm seat buckle can reach from the bottom end of the inner sleeve 320 to the top end of the inner sleeve 320 (ie, from bottom to top). When the spray arm seat clip passes over the top of the inner sleeve 320, the spray arm seat buckle is subjected to The squeezing force disappears, and under the action of the elastic force of the spray arm seat buckle, the spray arm seat buckle approaches the inner sleeve 320, so that the hook catches the top of the inner sleeve 320.

When the inner sleeve 320 needs to be separated from the spray arm base 200, it is only necessary to lift the spray arm 100 upward. The top end of the inner sleeve 320 squeezes the hook so that the hook retracts inside the inner sleeve 320 and continues to lift the spray arm 100. , The inner sleeve 320 can be separated from the spray arm base 200.

Based on the embodiment of FIG. 3, the load-bearing substrate 3100 of the present application may have various deformation modes, and these deformation modes fall within the protection scope of the present application. Several modifications of the carrier substrate 3100 according to the embodiment of the present application are summarized below with reference to FIG. 3.

For example, in the first embodiment not shown, the carrier base 3100 may only include: an outer sleeve 310, that is, compared with the embodiment of FIG. 3 described above, the middle sleeve 370 and the inner sleeve 320 are reduced. By using the ball 330 to directly cooperate with the outer sleeve 310 and the spray arm base 200, the rolling connection of the spray arm connection sleeve 120 and the spray arm base 200 can also be achieved. At this time, the spray arm base 200 is provided with a spray arm base ball groove suitable for cooperation with the ball 330 on the outer peripheral surface thereof.

For example, in the second embodiment not shown, the carrier base 3100 may only include the outer sleeve 310 and the middle sleeve 370, that is, the inner sleeve 320 is reduced compared to the embodiment of FIG. 3 described above. By using the ball 330 to directly cooperate with the outer sleeve 310 and the spray arm base 200, the rolling connection of the spray arm connection sleeve 120 and the spray arm base 200 can also be achieved. At this time, the spray arm base 200 is provided with a spray arm base ball groove suitable for cooperation with the ball 330 on the outer peripheral surface thereof.

For example, in a third embodiment not shown, the carrier base 3100 may include only an outer sleeve 310 and an inner sleeve 320, that is, the middle sleeve 370 is reduced compared to the embodiment of FIG. 3 described above. By using the ball 330 to directly cooperate with the outer sleeve 310 and the inner sleeve 320, the rolling connection of the spray arm connecting sleeve 120 and the spray arm base 200 can also be achieved.

The spray arm assembly 1000 according to the embodiment of the present application will be described in detail below with reference to FIGS. 8 to 18.

Referring to FIGS. 10-11 and 16-17, the spray arm threads are spray arm internal threads 121, and the carrier base 3100 includes: an outer sleeve 310, an inner sleeve 320, and an outer sleeve 310 sleeved on the inner sleeve. Outside of the 320, the ball thread is a ball external thread 340 that cooperates with the spray arm internal thread 121, and the ball external thread 340 is disposed on the outer sleeve 310 or the inner sleeve 320. As shown in FIG. 11, a ball external thread 340 is provided on the outer peripheral surface of the outer sleeve 310, the outer sleeve 310 is fixedly connected to the spray arm 100, and the ball 330 is in rolling contact with the outer surface of the spray arm base 200; as shown in FIG. 17, Ball external threads 340 are provided on the outer peripheral surface of the inner sleeve 320, the inner sleeve 320 is fixedly connected to the spray arm 100, the ball 330 is in rolling contact with the inner surface of the spray arm base 200, the spray arm 100, the spray arm base 200, and the ball assembly The connection structure of the three 300 is simple and stable.

The spray arm base 200 is provided to provide a connection interface for the spray arm 100. At the same time, the spray arm base 200 also serves as the water inlet pipe of the spray arm 100. The spray arm 100 and the spray arm base 200 are connected through a ball assembly 300 to enable the spray arm The rolling contact between 100 and the spray arm base 200 can reduce the friction between the spray arm 100 and the spray arm base 200, which is conducive to reducing the hydrodynamic loss, improving the utilization rate of the hydrodynamic force, and ensuring the water from The pressure when the spray hole of the spray arm 100 sprays out is large, which is beneficial to improving the washing effect of the dishwasher. In addition, the spray arm 100 and the spray arm base 200 are connected by a ball assembly 300, which can also reduce the height dimension of the spray arm assembly 1000, thereby saving the internal space of the dishwasher and leaving more space for the tableware. Space, increasing the dishwasher capacity.

The first embodiment of the present application will be described in detail below with reference to FIGS. 8 to 15.

Referring to FIGS. 10 to 13, the inner sleeve 320 is provided with a plurality of ball holes 350. The ball 330 is rotatably installed in the ball holes 350. The ball holes 350 provide support for the fixing of the ball 330 and ensure multiple balls. The relative position of 330 is unchanged, preventing collisions and squeezing between the multiple balls 330, thereby improving the working stability of the ball assembly 300, and further improving the smoothness when the spray arm 100 rotates. Optionally, the number of the ball holes 350 is the same as the number of the balls 330.

The ball 330 protrudes from the inner peripheral surface and the outer peripheral surface of the inner sleeve 320 in the radial direction of the inner sleeve 320. That is, the diameter of the ball 330 is larger than the wall thickness of the inner sleeve 320. Inside the inner sleeve 320, the outer side of the ball 330 protrudes outward from the outer peripheral surface of the inner sleeve 320, and the inner side of the ball 330 protrudes from the inner peripheral surface of the inner sleeve 320 inward. In this way, the outer side of the ball 330 can communicate with the outer sleeve. The inner surface of 310 is in rolling contact. The inner side of the ball 330 can be in rolling contact with the outer surface of the spray arm base 200. The ball 330 is in rolling contact with the outer sleeve 310 and the spray arm base 200. The ball 330 is the spray arm 100 and spray The connection of the arm mount 200 provides support. When the spray arm 100 and the spray arm base 200 rotate relative to each other, the outer sleeve 310 and the spray arm base 200 are in contact with each other through balls 330, so there is rolling friction between the outer sleeve 310 and the spray arm base 200.

The ball external thread 340 is provided on the outer peripheral surface of the outer sleeve 310. The ball external thread 340 is screwed with the spray arm internal thread 121 to thereby fix the outer sleeve 310 and the spray arm 100, and the spray arm 100 and the outer sleeve 310. They are connected by thread, which is convenient for assembly and disassembly and reliable connection. At this time, the form of friction between the spray arm 100 and the spray arm base 200 is equivalent to rolling friction, which can reduce the loss of hydrodynamic force and allow more water energy to be sprayed from the spray holes and drive holes on the spray arm 100 , To ensure that the water pressure is greater after spraying from the water spray holes, which is conducive to washing dishes, thereby improving the washing performance of the dishwasher.

In a specific embodiment, the plurality of ball holes 350 can be evenly distributed along the circumferential direction of the inner sleeve 320, so that the relative rotation of the spray arm 100 and the spray arm base 200 can be made more stable. Preferably, the number of the balls 330 is an even number, so that the force of the ball assembly 300 can be balanced and the stress concentration phenomenon can be alleviated.

Optionally, the diameter of the balls 330 is 3mm-8mm, and the number of the balls 330 is 4-12.

Further, referring to FIG. 14 to FIG. 15, the spray arm base 200 may include a spray arm base body 210 and a spray arm base flange 220. The spray arm base flange 220 is disposed below the spray arm base body 210 and sprays. The arm base flange 220 extends outward in the radial direction of the spray arm base body 210. The outer diameter of the spray arm base flange 220 is larger than the outer diameter of the spray arm base body 210. The spray arm base flange 220 is suitable for interfacing with the dishwasher. Other parts are connected, the outer diameter of the spray arm base flange 220 is larger, so that the fixing between the spray arm base 200 and other parts can be more stable and reliable. A spray arm base ball groove 270 is provided on the outer peripheral surface of the spray arm base body 210 and is adapted to cooperate with the ball 330.

Further, an outer sleeve ball groove 313 suitable for cooperating with the ball 330 is provided on the inner peripheral surface of the outer sleeve 310. The outer sleeve ball groove 313 and the spray arm seat ball groove 270 are circumferential annular grooves. It can ensure the smoothness of the entire rotation of the spray arm 100. The ball 330 is in rolling contact with the outer sleeve ball groove 313 and the spray arm seat ball groove 270, and the friction force is small. In a specific embodiment, the diameter of the outer sleeve ball groove 313 and the spray arm seat ball groove 270 may be equal to the diameter of the ball 330, or may be slightly larger than the diameter of the ball 330, thereby ensuring that the ball 330 and the outer sleeve ball The groove 313 and the ball groove 270 of the spray arm seat are well matched.

Further, referring to FIG. 11, FIG. 13, and FIG. 15, in the center axis direction of the spray arm connection sleeve 120, the positions of the spray arm seat ball groove 270, the outer sleeve ball groove 313, and the ball hole 350 correspond to each other. 330 is partially provided in the ball hole 350, the outer side of the ball 330 is in contact with the outer sleeve ball groove 313, and the inner side of the ball 330 is in contact with the spray arm seat ball groove 270, thereby completing the connection between the spray arm seat 200 and the outer sleeve 310. The outer sleeve 310 is fixedly connected to the spray arm 100, thereby completing the indirect connection of the spray arm 100 and the spray arm base 200. The positions of the spray arm seat ball groove 270, the outer sleeve ball groove 313, and the ball hole 350 correspond to each other, which can prevent the track of the ball 330 from sliding when the spray arm 100 rotates, and the boom seat ball groove 270 and the outer sleeve ball groove 313 The trajectories are different, thereby being squeezed, which makes the spray arm 100 unable to rotate.

Specifically, referring to FIGS. 10-11, the outer sleeve 310 may include: an outer sleeve peripheral wall 311 and an outer sleeve bottom wall 312. The outer sleeve bottom wall 312 is disposed on the outer sleeve peripheral wall 311 away from the spray arm 100. At one end, as shown in FIG. 11, the outer sleeve bottom wall 312 is disposed at the lower end of the outer sleeve peripheral wall 311, and the outer sleeve bottom wall 312 extends inward along the radial direction of the outer sleeve peripheral wall 311, and the outer sleeve ball groove 313 is provided At the boundary between the outer sleeve bottom wall 312 and the outer sleeve peripheral wall 311, in this way, the ball 330 is disposed above the outer sleeve bottom wall 312, so that the outer sleeve bottom wall 312 can protect the ball 330 to prevent The exposure of the ball 330 to the outside affects the service life of the ball 330.

In addition, a ball external thread 340 is provided on the outer peripheral surface of the outer sleeve peripheral wall 311, an outer sleeve ball groove 313 is provided on the inner peripheral surface of the outer sleeve peripheral wall 311, and the outer sleeve ball groove 313 is provided below the ball external thread 340 Therefore, the fixed position of the outer sleeve 310 and the spray arm 100 is located above, and the fitting position of the outer sleeve 310 and the spray arm base 200 is located below, thereby fully utilizing the height space to prevent the spray arm 100 and the spray arm base 200. The axial dimension of the connection fit is too large.

Optionally, referring to FIGS. 11 and 13, a plurality of rib plates 230 are provided between the outer peripheral surface of the spray arm base body 210 and the spray arm base flange 220, and the bottom wall 312 of the outer sleeve is disposed on the rib plate 230. Up. By providing the ribs 230, the structural strength and rigidity of the spray arm base body 210 and the spray arm base flange 220 are increased, and the spray arm base 200 is effectively prevented from being broken and damaged when the spray arm 100 rotates at a high speed, thereby facilitating the extension of the spray arm assembly. 1000 life.

The plurality of rib plates 230 are uniformly distributed along the circumferential direction of the spray arm base body 210, thereby facilitating the performance of the spray arm base 200. Optionally, the number of the rib plates 230 is four, and two adjacent rib plates 230 are spaced apart. 90 °.

The ball hole 350 is disposed at the bottom of the inner sleeve 320. As shown in FIG. 13, the ball hole 350 is a superior arc hole, and a ball access opening 351 is formed at a bottom gap of the ball hole 350. The ball 330 enters or exits from the ball hole 350 through the ball access port 351, thereby facilitating the installation and removal of the ball 330 in the ball hole 350.

Further, a weakening groove 360 is provided between two adjacent ball holes 350, and a weakening groove pillar 361 is provided in the weakening groove 360. Optionally, the central axis of the weakening groove pillar 361 and the central axis of the inner sleeve 320 Parallel, thereby facilitating the manufacturing process of the inner sleeve 320. By providing the weakening groove 360, the rigidity between two adjacent ball holes 350 can be made smaller. Therefore, when the ball 330 is installed, the ball hole 350 is easily deformed, thereby reducing the difficulty of installing or removing the ball 330. In addition, by providing the weakening groove column 361, a certain strengthening effect can be played, thereby preventing the weakening groove 360 from excessively weakening the rigidity of the inner sleeve 320, which is beneficial to improving the working reliability of the ball assembly 300.

The second embodiment of the present application will be described in detail below with reference to FIGS. 16 to 18.

As shown in FIG. 16 to FIG. 18, the outer sleeve 310 is provided with a plurality of ball holes 350. The ball 330 is rotatably installed in the ball hole 350. The ball hole 350 provides support for the fixing of the ball 330 and ensures multiple balls. The relative position of 330 is unchanged, preventing collisions and squeezing between the multiple balls 330, thereby improving the working stability of the ball assembly 300, and further improving the smoothness when the spray arm 100 rotates. Optionally, the number of the ball holes 350 is the same as the number of the balls 330.

It should be noted that the outer sleeve 310 mentioned in this application means that the sleeve is located outside the entire ball assembly 300, and the "outer" of the outer sleeve 310 is relative to the "inner" of the inner sleeve 320 That is, the outer sleeve 310 is located at the periphery of the inner sleeve 320, and the inner sleeve 320 is enclosed in the hollow inner cavity of the outer sleeve 310, which does not mean that the outer sleeve 310 must be exposed to the outside of the entire spray arm 1000.

The ball 330 protrudes from the inner peripheral surface and the outer peripheral surface of the outer sleeve 310 in the radial direction of the outer sleeve 310. That is, the diameter of the ball 330 is larger than the wall thickness of the outer sleeve 310, and only the middle part of the ball 330 is installed outside. In the sleeve 310, the outer side of the ball 330 protrudes outward from the outer peripheral surface of the outer sleeve 310, and the inner side of the ball 330 protrudes inward from the inner peripheral surface of the outer sleeve 310. In this way, the outer side of the ball 330 can communicate with the The inner surface is in rolling contact. The inner side of the ball 330 can be in rolling contact with the outer surface of the inner sleeve 320. The ball 330 is in rolling contact with the inner sleeve 320 and the spray arm base 200. The ball 330 is the spray arm 100 and the spray arm base. The 200 connection provides support. When the spray arm 100 and the spray arm base 200 rotate relative to each other, the inner sleeve 320 and the spray arm base 200 are in contact with each other through balls 330, so there is rolling friction between the inner sleeve 320 and the spray arm base 200.

The ball external thread 340 is provided on the outer peripheral surface of the inner sleeve 320. The ball external thread 340 and the spray arm internal thread 121 are screwed together to thereby fix the inner sleeve 320 and the spray arm 100, and the spray arm 100 and the inner sleeve 320 are connected by a thread, which is convenient for assembly and disassembly and reliable connection. Similarly, the form of friction between the spray arm 100 and the spray arm base 200 is equivalent to rolling friction, which can reduce the loss of hydrodynamic force and allow more water energy to be sprayed from the spray holes and drive holes on the spray arm 100 , To ensure that the water pressure is greater after spraying from the water spray holes, which is conducive to washing dishes, thereby improving the washing performance of the dishwasher.

In a specific embodiment, the plurality of ball holes 350 may be evenly distributed along the circumferential direction of the outer sleeve 310, so that the relative rotation of the spray arm 100 and the spray arm base 200 may be more stable. Preferably, the number of the balls 330 is an even number, so that the force of the ball assembly 300 can be balanced and the stress concentration phenomenon can be alleviated. Referring to FIG. 18, the ball hole 350 is located at the middle and lower part of the outer sleeve 310.

Optionally, the diameter of the balls 330 is 3mm-8mm, and the number of the balls 330 is 4-12.

Specifically, the spray arm base 200 may include a spray arm base water inlet shaft 240, a spray arm base ring wall 260, and a spray arm base peripheral wall 250. The spray arm base ring wall 260 is disposed on the spray arm base water inlet shaft 240 and the spray arm base. Between the peripheral walls 250, the spray arm seat peripheral wall 250 is disposed above the spray arm seat ring wall 260, the spray arm seat peripheral wall 250 is vertically connected to the spray arm seat ring wall 260, and the connection position is located at the lower end of the spray arm seat peripheral wall 250 and the spray The outermost end of the arm seat ring wall 260, the spray arm seat water inlet shaft 240 is disposed below the spray arm seat ring wall 260, the spray arm seat water inlet shaft 240 is vertically connected to the spray arm seat ring wall 260, and the connection position is located in the spray The diameter of the spray arm seat peripheral wall 250 is larger than the diameter of the spray arm seat inlet shaft 240 at the uppermost part of the arm seat water intake shaft 240 and the innermost end of the spray arm seat ring wall 260. The spray arm base peripheral wall 250 is parallel to the spray arm base water inlet shaft 240. The inner diameter of the spray arm base water inlet shaft 240 is equal to the inner diameter of the inner sleeve 320, so that the spray arm base water inlet shaft 240 and the inner sleeve 320 can be guaranteed. The speed of the water flow is equal to prevent sudden changes in the water speed at the connection between the spray arm base 200 and the ball assembly 300 and affect the stability of the spray arm base 200 and the spray arm 100 when they are relatively rotated.

The space surrounded by the spray arm seat peripheral wall 250 forms a receiving space suitable for receiving the ball assembly 300, and the receiving space is located above the spray arm seat ring wall 260.

A spray arm seat ball groove 270 is provided on the inner peripheral surface of the spray arm seat peripheral wall 250 and is adapted to cooperate with the ball 330.

Further, the outer sleeve surface of the inner sleeve 320 is provided with an inner sleeve ball groove 321 suitable for cooperating with the ball 330, the inner sleeve ball groove 321 and the spray arm seat ball groove 270 are both circumferential annular grooves, so that it can be The smooth rotation of the entire rotation of the spray arm 100 is guaranteed. The ball 330 is in rolling contact with the inner sleeve ball groove 321 and the spray arm seat ball groove 270, and the friction force is small. In a specific embodiment, the diameter of the inner sleeve ball groove 321 and the spray arm seat ball groove 270 may be equal to the diameter of the ball 330, or may be slightly larger than the diameter of the ball 330, thereby ensuring that the ball 330 and the inner sleeve ball The groove 321 and the ball groove 270 of the spray arm seat are well matched.

Further, referring to FIG. 17, in the center axis direction of the spray arm connecting sleeve 120, the positions of the spray arm seat ball groove 270, the inner sleeve ball groove 321, and the ball hole 350 correspond, and the ball 330 is partially provided on the ball In the hole 350, the outside of the ball 330 is in contact with the spray arm seat ball groove 270, and the inside of the ball 330 is in contact with the inner sleeve ball groove 321, thereby completing the connection between the spray arm seat 200 and the inner sleeve 320, and the inner sleeve 320 is in turn It is fixedly connected to the spray arm 100, thereby completing the indirect connection of the spray arm 100 and the spray arm base 200. The positions of the spray arm seat ball groove 270, the inner sleeve ball groove 321, and the ball hole 350 correspond to the positions of the spray arm 100 ball 270 and the inner sleeve ball groove 321 when the spray arm 100 rotates. The trajectories are different, thereby being squeezed, which makes the spray arm 100 unable to rotate.

In addition, both the ball external thread 340 and the inner sleeve ball groove 321 are provided on the outer peripheral surface of the inner sleeve 320, and the inner sleeve ball groove 321 is provided below the ball external thread 340. Thus, the inner sleeve 320 and the spray The fixed position of the arm 100 is located above, and the fitting position of the inner sleeve 320 and the spray arm base 200 is located below, thereby making full use of the height space to prevent the axial dimension of the connection and cooperation of the spray arm 100 and the spray arm base 200 from being too large.

Further, the inner sleeve 320 and the outer sleeve 310 are disposed above the spray arm seat ring wall 260, so that the spray arm seat ring wall 260 can protect the ball assembly 300 to prevent the ball assembly 300 from being exposed to the outside. This affects the service life of the ball assembly 300. The gap between the lower surface of the inner sleeve 320 and the upper surface of the spray arm seat ring wall 260 is L1, and L1 satisfies the relationship: 0mm <L1≤0.5mm. Therefore, the spray arm 100 and the spray arm seat 200 face each other. During rotation, sliding friction between the lower surface of the inner sleeve 320 and the upper surface of the spray arm seat ring wall 260 can be avoided, that is, there is no friction between the inner sleeve 320 and the spray arm seat 200. In addition, The gap between the lower surface of the inner sleeve 320 and the upper surface of the spray arm seat ring wall 260 is small, which can prevent leftovers or other contaminants from entering the gap and increase the friction between the spray arm 100 and the spray arm seat 200. The spray arm 100 is stuck, and when the spray arm 100 is tilted, the inner sleeve 320 can quickly contact the spray arm base 200, thereby preventing the spray arm 100 from further tilting, and also preventing excessive water from entering the inner sleeve 320 and the spray arm. Hydrodynamic loss is caused between the seat ring walls 260.

A rib (not shown) is provided between the outer peripheral surface of the spray arm seat water inlet shaft 240 and the spray arm seat ring wall 260 to increase the structural strength and rigidity of the spray arm seat 200, thereby effectively preventing the spray arm 100 When the high-speed rotation is performed, the spray arm base 200 is broken and damaged, which is beneficial to extending the service life of the spray arm assembly 1000.

Referring to FIGS. 10-11 and 16-17, the spray arm 100 may include: a spray arm body 110 and a spray arm connection sleeve 120. The spray arm connection sleeve 120 is disposed on the lower side of the spray arm body 110, and by setting a spray The arm connection sleeve 120 facilitates the connection between the spray arm 100 and the spray arm base 200, and ensures that the spray arm 100 and the spray arm base 200 can be reliably connected as a whole.

The spray arm connecting sleeve 120 and the spray arm body 110 have a spray arm chamber 130 in communication, and the spray arm seat 200 has a spray arm chamber 280 in communication with the spray arm chamber 130, thereby ensuring the water supply of the dishwasher. The water can smoothly enter the spray arm chamber 130 through the spray arm seat chamber 280, and then the water is sprayed onto the surface of the tableware through the spray holes on the spray arm 100, thereby completing the operation of cleaning the tableware. As the water continuously enters the spray arm chamber 130, the water pressure in the spray arm chamber 130 becomes higher and higher. At this time, the reaction force generated by the water column sprayed from the driving hole of the spray arm 100 is also greater, and the spray arm 100 The faster the rotation speed, the greater the force of the sprayed water on the tableware, which is conducive to cleaning the stains on the tableware. Therefore, by setting the spray arm chamber 130, the washing effect of the dishwasher can be better. . The direction and position of the water column sprayed by the spray arm 100 on the tableware are multi-directional, which reduces the dead angle and is easier to clean. Due to the large coverage of the water flow, the cleaning time will be correspondingly reduced, which is beneficial to shorten the cleaning time.

The spray arm internal thread 121 is disposed on the inner peripheral surface of the spray arm connection sleeve 120. As shown in FIG. 11, the outer sleeve 310 is fixed to the spray arm internal thread 121 by screwing; as shown in FIG. 17, the inner sleeve 320 and the spray arm The internal thread 121 is screwed and fixed.

After the spray arm 100 and the spray arm base 200 are connected by using the ball assembly 300, the height dimension of the spray arm connection sleeve 120 can be reduced, thereby reducing the overall height dimension of the spray arm assembly 1000, leaving room for tableware More space.

In a specific embodiment, the ball 330 may be a plastic ball or a stainless steel ball, because the working environment of the spray arm assembly 1000 is filled with water, and the spray arm assembly 1000 has been in a hot and humid environment for a long time, which may cause the ball 330 to rust and jam, and the plastic ball or stainless steel The ball has a strong anti-corrosion ability, which can effectively slow down or even prevent the ball 330 from rusting.

In some embodiments not shown, the ball 330 may be disposed between the outer sleeve 310 and the inner sleeve 320, that is, the outer sleeve 310 and the inner sleeve 320 are not provided with ball holes 350, and the outer sleeve An outer sleeve ball groove 313 is provided on the inner peripheral surface of 310, and an inner sleeve ball groove 321 is provided on the outer peripheral surface of the inner sleeve 320. The outer side of the ball 330 is in rolling contact with the outer sleeve ball groove 313, and the inner side of the ball 330 Rolling contact with the inner sleeve ball groove 321 can also realize the rolling connection of the spray arm 100 and the spray arm base 200. The rolling friction between the spray arm 100 and the spray arm base 200 is beneficial to reduce the hydrodynamic consumption and thus improve the spray Washing ability of the arm assembly 1000.

A washing appliance according to another embodiment of the present application includes the spray arm assembly 1000 of the above embodiment. The washing appliance can be a dishwasher, or a washing appliance with a washing function, such as a fruit and vegetable washing machine, a medical washing machine, etc. The effect is similar to that of the spray arm assembly 1000 installed in the dishwasher, which is not repeated here. .

In the description of this specification, the description with reference to the terms “one embodiment”, “some embodiments”, “examples”, “specific examples” or “some examples” and the like means specific features described in conjunction with the embodiments or examples, A structure, material, or characteristic is included in at least one embodiment or example of the present application. In this specification, the schematic expressions of the above terms are not necessarily directed to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. In addition, those skilled in the art can join and combine different embodiments or examples described in this specification.

Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limitations on the present application. Those skilled in the art may, within the scope of the present application, understand the above. Embodiments are subject to change, modification, substitution, and modification.

Claims (30)

1. A spray arm assembly is characterized in that it includes:

   A spray arm having a spray arm thread;

   A spray arm base, the spray arm is connected to the spray arm base, and the spray arm is rotatable relative to the spray arm base;

   A ball assembly, which is arranged at the connection and cooperation between the spray arm and the spray arm seat, and the ball assembly includes a bearing base and a ball, and the ball is rotatably disposed on the bearing base; The bearing base is provided with a ball thread which is matched with the spray arm thread.
2. The spray arm assembly according to claim 1, wherein the spray arm thread is a spray arm external thread, and the ball thread is a ball internal thread that cooperates with the spray arm internal thread.
3. The spray arm assembly according to claim 2, wherein the spray arm comprises: a spray arm body and a spray arm connection sleeve, the spray arm connection sleeve is disposed on a lower side of the spray arm body, and the spray arm An arm connecting sleeve has a spray arm chamber in communication with the spray arm body, the spray arm seat has a spray arm seat chamber in communication with the spray arm chamber, and the spray arm external thread is provided in the spray arm seat. The outer peripheral surface of the spray arm connection sleeve.
4. The spray arm assembly according to claim 3, wherein the carrier base comprises:

   An outer sleeve is sleeved on the outside of the spray arm connection sleeve, and the ball internal thread is provided on the inner peripheral surface of the outer sleeve.
5. The spray arm assembly according to claim 4, wherein the carrier base further comprises: an intermediate sleeve, the intermediate sleeve is disposed inside the outer sleeve, and the intermediate sleeve is provided with a plurality of Ball holes, and the balls are installed in the ball holes.
6. The spray arm assembly according to claim 4 or 5, wherein the carrier base further comprises: an inner sleeve, the inner sleeve is adapted to be connected to the spray arm base, and the spray arm base is connected to the spray arm base and The inner sleeves are detachably connected.
7. The spray arm assembly according to claim 6, wherein an outer sleeve ball groove adapted to cooperate with the ball is provided on an inner peripheral surface of the outer sleeve, and an outer peripheral surface of the inner sleeve is provided. An inner sleeve ball groove adapted to cooperate with the ball is provided.
8. The spray arm assembly according to claim 6, wherein an external thread of an inner sleeve is provided on an outer peripheral surface of the inner sleeve, and an inner thread of the spray arm seat is provided to be suitable for communicating with the inner sleeve. The inner thread of the spray arm seat matched with the outer thread of the sleeve is arranged below the ball groove of the inner sleeve.
9. The spray arm assembly according to claim 6, wherein the spray arm seat is located at least partially inside the inner sleeve, and a top of the spray arm seat has a spray arm seat buckle, and the spray arm The seat buckle is adapted to be clamped on the upper surface of the inner sleeve.
10. The spray arm assembly according to claim 9, wherein a top end of the spray arm base has a plurality of grooves, and an opening direction of the groove is parallel to an axial direction of the spray arm base, and the spray arm A seat buckle extends upward from the bottom wall of the groove, and two sides of the spray arm seat buckle are separated from two side walls of the groove, and a top end of the spray arm seat buckle is provided with a direction The hook of the inner sleeve.
11. The spray arm assembly according to claim 5, wherein the ball hole is provided at the bottom of the intermediate sleeve, the ball hole is a superior arc hole, and a ball access opening is formed at the bottom notch.
12. The spray arm assembly according to claim 4, wherein the outer sleeve comprises: an outer sleeve peripheral wall and an outer sleeve bottom wall, and the outer sleeve bottom wall is disposed away from the outer sleeve peripheral wall. One end of the spray arm, the bottom wall of the outer sleeve extends inward along the radial direction of the peripheral wall of the outer sleeve, and the ball is disposed above the bottom wall of the outer sleeve.
13. The spray arm assembly according to claim 6, wherein the spray arm connection sleeve comprises a peripheral wall of the connection sleeve and a bottom wall of the connection sleeve extending inwardly along the radial direction of the peripheral wall of the connection sleeve, the bottom of the connection sleeve A wall is disposed at an end of the peripheral wall of the connection sleeve remote from the spray arm body, and the inner sleeve is disposed below a bottom wall of the connection sleeve.
14. The spray arm assembly according to claim 13, wherein an inner diameter of a bottom wall of the connection sleeve is equal to an inner diameter of the inner sleeve.
15. The spray arm assembly according to claim 13, wherein a gap between an upper surface of the inner sleeve and a lower surface of the bottom wall of the connection sleeve is L1, and L1 satisfies a relational formula: 0mm <L1≤0.5 mm.
16. The spray arm assembly according to claim 6, wherein the spray arm base has a spray arm base water inlet hole, and an inner diameter of the spray arm base water inlet hole is equal to an inner diameter of the inner sleeve.
17. The spray arm assembly according to claim 1, wherein the spray arm thread is an internal thread of the spray arm, and the bearing base comprises: an outer sleeve, an inner sleeve, and the outer sleeve is sleeved on the On the outside of the inner sleeve, the ball thread is a ball external thread that cooperates with the inner thread of the spray arm, and the ball external thread is disposed on the outer sleeve or the inner sleeve.
18. The spray arm assembly according to claim 17, wherein the inner sleeve is provided with a plurality of ball holes, the balls are installed in the ball holes, and the outer threads of the balls are provided on the jacket The outer peripheral surface of the tube.
19. The spray arm assembly according to claim 18, wherein the spray arm base comprises: a spray arm base body, and an outer peripheral surface of the spray arm base body is provided with a spray arm base adapted to cooperate with the ball Ball groove.
20. The spray arm assembly according to claim 19, wherein an outer sleeve ball groove adapted to cooperate with the ball is provided on an inner peripheral surface of the outer sleeve, and the outer sleeve ball groove, the The ball grooves of the spray arm seat are all circumferential grooves.
21. The spray arm assembly according to claim 19, wherein the outer sleeve comprises: an outer sleeve peripheral wall and an outer sleeve bottom wall, and the outer sleeve bottom wall is disposed away from the outer sleeve peripheral wall. One end of the spray arm, the bottom wall of the outer sleeve extends inward along the radial direction of the peripheral wall of the outer sleeve, and the ball is disposed above the bottom wall of the outer sleeve.
22. The spray arm assembly according to claim 19 or 21, wherein the spray arm base further comprises: a spray arm base flange extending outward in a radial direction of the spray arm base body, and the spray arm base A flange is disposed below the spray arm base body, and a plurality of ribs are provided between an outer peripheral surface of the spray arm base body and the spray arm base flange.
23. The spray arm assembly according to claim 18, wherein the ball hole is provided at the bottom of the inner sleeve, the ball hole is a superior arc hole, and a ball access opening is formed at the bottom notch.
24. The spray arm assembly according to claim 17, wherein the outer sleeve is provided with a plurality of ball holes, the balls are installed in the ball holes, and the ball external threads are provided in the inner sleeve. The outer peripheral surface of the tube.
25. The spray arm assembly according to claim 24, wherein the spray arm base comprises: a spray arm base water inlet shaft, a spray arm base peripheral wall, and the spray arm base water inlet shaft and the spray arm base The spray arm seat ring wall between the peripheral walls, the spray arm seat peripheral wall is disposed above the spray arm seat ring wall, and the spray arm seat water inlet shaft is disposed below the spray arm seat ring wall. The space surrounded by the peripheral wall of the spray arm seat forms a receiving space suitable for receiving the ball assembly, and the receiving space is located above the annular wall of the spray arm seat.
26. The spray arm assembly according to claim 25, wherein an inner diameter of a water inlet shaft of the spray arm seat is equal to an inner diameter of the inner sleeve.
27. The spray arm assembly according to claim 25, wherein an inner sleeve ball groove adapted to cooperate with the ball is provided on an outer peripheral surface of the inner sleeve, and an inner peripheral surface of a peripheral wall of the spray arm seat A spray arm seat ball groove adapted to cooperate with the ball is provided on the upper sleeve, and the inner sleeve ball groove and the spray arm seat ball groove are both circumferential annular grooves.
28. The spray arm assembly according to claim 25, wherein the inner sleeve and the outer sleeve are disposed above a wall wall of the spray arm seat, and a lower surface of the inner sleeve and the outer sleeve The gap between the upper surfaces of the spray arm seat ring walls is L1, and L1 satisfies the relationship: 0mm <L1≤0.5mm.
29. The spray arm assembly according to claim 18 or 24, wherein the spray arm comprises: a spray arm body and a spray arm connection sleeve, and the spray arm connection sleeve is disposed on a lower side of the spray arm body, so that The spray arm connecting sleeve is provided with a spray arm chamber in communication with the spray arm body, the spray arm seat has a spray arm seat chamber in communication with the spray arm chamber, and the internal thread of the spray arm is provided in The inner peripheral surface of the spray arm connection sleeve.
30. A washing appliance, comprising a spray arm assembly according to any one of claims 1-29.

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