Washing electric appliance

Abstract

The invention discloses a washing electric appliance. Comprising a cavity and a gushing arm assembly, the gushing arm assembly is installed in the cavity, the gushing arm assembly comprises a gushing arm and a gushing arm seat, the gushing arm seat comprises an installation part, the installation part is provided with an installation space, the gushing arm is provided with a water inlet shaft, and the water inlet shaft is at least partially installed in the installation space; balls are arranged between the outer side face, located in the installation space, of the water inlet shaft and the inner side face of the installation part and can be connected with the water inlet shaft and the installation part in a rolling mode. When the gushing arm rotates, rolling friction between the gushing arm and the gushing arm base can be achieved through the balls, so that friction force between the gushing arm and the gushing arm base is rolling friction force, power loss for driving the gushing arm to rotate is reduced, the utilization rate of the power for driving the gushing arm to rotate is increased, and pressure is larger after water is sprayed out of the gushing arm spraying holes; and the cleaning effect of the washing electric appliance is improved.

Description

[0001] This case is a divisional application of application number 201810988941.9, application date August 28, 2018, invention name “Spray arm assembly and washing appliance” Technical Field

[0002] The present invention relates to the technical field of household appliances, in particular to a washing appliance. Background Art

[0003] At present, washing appliances, such as dishwashers, are used by more and more users due to their convenience. Generally speaking, users' demand for the cleaning of washing appliances ranks first. One factor that affects the cleaning of washing appliances is the spray arm of the washing appliance. When the washing appliance is working, the spray arm rotates to spray the detergent at high speed onto the tableware to achieve the purpose of cleaning the tableware. In the related art, the spray arm and the spray arm seat are connected by a snap-fit. When relative motion occurs, the friction between the two is sliding friction, and the loss of water power is relatively large, which affects the cleaning efficiency of the washing appliance. On the other hand, the snap-fit ​​connection method will occupy more cavity space of the washing appliance, thus reducing the space for placing tableware. Summary of the invention

[0004] An embodiment of the present invention provides a washing appliance, comprising a cavity and a spray arm assembly, wherein the spray arm assembly is installed in the cavity, the spray arm assembly comprises a spray arm and a spray arm seat, the spray arm seat comprises a mounting portion, the mounting portion is provided with an mounting space, the spray arm is provided with a water inlet shaft, the water inlet shaft is at least partially installed in the mounting space, the water inlet shaft is located between the outer side surface of the mounting space and the inner side surface of the mounting portion, and a ball is provided, wherein the ball can rollingly connect the water inlet shaft and the mounting portion.

[0005] In the above-mentioned spray arm assembly, when the spray arm rotates, the ball bearing can realize rolling friction between the spray arm and the spray arm seat, so that the friction force between the spray arm and the spray arm seat is rolling friction. In this way, the power loss of driving the spray arm to rotate is reduced, and the utilization rate of the power driving the spray arm to rotate is improved, so that the pressure of water is greater after being sprayed out from the spray hole of the spray arm, which is beneficial to increase the cleaning effect of the spray arm assembly.

[0006] In some embodiments, a first ball groove is formed on the outer side surface of the water inlet shaft along the circumference of the water inlet shaft, and the balls are partially accommodated in the first ball groove.

[0007] In some embodiments, the spray arm assembly includes a first connecting shaft, which is accommodated in the installation space, and the first connecting shaft is located between the outer side surface of the water inlet shaft and the inner side surface of the installation portion. The first connecting shaft is provided with a first shaft through hole, and the water inlet shaft passes through the first shaft through hole. The upper end of the first connecting shaft is provided with a ball hole, and the ball is partially accommodated in the ball hole.

[0008] In certain embodiments, a center of the ball hole is horizontally aligned with a center of the first ball groove.

[0009] In some embodiments, the spray arm assembly includes a second connecting shaft, which is at least partially accommodated in the installation space, and is connected to the installation portion. The second connecting shaft is provided with a second shaft through hole, and the water inlet shaft passes through the second shaft through hole, and the ball can rollingly connect the outer side surface of the water inlet shaft and the inner side surface of the second connecting shaft.

[0010] In certain embodiments, a second ball groove is formed on the inner side surface of the second connecting shaft along the circumference of the second connecting shaft, and the balls are partially accommodated in the second ball groove.

[0011] In some embodiments, a flange is formed at the upper end of the second connecting shaft and protrudes toward the axis of the second connecting shaft, and the flange partially covers the ball.

[0012] In some embodiments, a thread is formed on the outer side surface of the second connecting shaft, a thread is correspondingly formed on the inner side surface of the mounting portion, and the second connecting shaft and the mounting portion are connected by threaded cooperation.

[0013] In some embodiments, the spray arm seat includes a water inlet portion connected to the mounting portion, the water inlet portion and the water inlet shaft are coaxially arranged, the water inlet shaft is provided with a first water inlet through hole, the water inlet portion is provided with a second water inlet through hole, and the aperture of the first water inlet through hole is equal to the aperture of the second water inlet through hole.

[0014] In certain embodiments, the spray arm seat includes a step portion connecting the mounting portion and the water inlet portion, and a gap of 0.4 to 2.2 mm is formed between the bottom of the water inlet shaft and the step portion.

[0015] The washing appliance according to the embodiment of the present invention comprises a cavity and a spray arm assembly according to any one of the above embodiments, wherein the spray arm assembly is installed in the cavity, and the spray arm is located in the cavity.

[0016] In the above-mentioned washing appliance, when the spray arm of the spray arm assembly rotates, the ball bearing can realize rolling friction between the spray arm and the spray arm seat, so that the friction between the spray arm and the spray arm seat is rolling friction. In this way, the power loss of driving the spray arm to rotate is reduced, and the utilization rate of the power driving the spray arm to rotate is improved, so that the pressure of water is higher after being sprayed out from the spray hole of the spray arm, which is beneficial to the cleaning effect of the spray arm assembly.

[0017] Additional aspects and advantages of embodiments of the present invention will be given in part in the following description and in part will be obvious from the following description or learned through practice of embodiments of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the embodiments of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 Schematic diagram of a spray arm assembly according to an embodiment of the present invention.

[0020] Figure 2 Schematic diagram of an exploded view of a spray arm assembly according to an embodiment of the present invention.

[0021] Figure 3 Schematic cross-sectional view of a spray arm assembly according to an embodiment of the present invention.

[0022] Figure 4 yes Figure 3 An enlarged schematic diagram of the spray arm assembly in area IV.

[0023] Figure 5 It is a perspective exploded schematic diagram of a spray arm assembly according to an embodiment of the present invention.

[0024] Figure 6 2 is a schematic plan view of a washing appliance according to an embodiment of the present invention.

[0025] Description of main component symbols:

[0026] Washing appliance 100, spray arm assembly 10, spray arm 11, water inlet shaft 112, sub-arm 114, first ball groove 1122, first water inlet through hole 1124, spray arm seat 12, mounting portion 122, mounting space 1222, water inlet portion 124, second water inlet through hole 1242, step portion 126, ball 13, first connecting shaft 14, first shaft through hole 142, ball hole 144, notch 146, second connecting shaft 15, second shaft through hole 152, second ball groove 154, flange 156, thread 158, cavity 20. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0028] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or mutual communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0031] The disclosure below provides many different embodiments or examples to realize different structures of the present invention. In order to simplify the disclosure of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the present invention. In addition, the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplicity and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides various specific examples of processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0032] Please combine Figures 1 to 6 The spray arm assembly 10 of the embodiment of the present invention can be used in a washing appliance 100. The spray arm assembly 10 includes a spray arm 11 and a spray arm seat 12. The spray arm seat 12 includes a mounting portion 122. The mounting portion 122 is provided with a mounting space 1222. The spray arm 11 is provided with a water inlet shaft 112. The water inlet shaft 112 is at least partially installed in the mounting space 1222. The water inlet shaft 112 is located between the outer side surface of the mounting space 1222 and the inner side surface of the mounting portion 122. A ball 13 is provided. The ball 13 can rollingly connect the water inlet shaft 112 and the mounting portion 122.

[0033] In the spray arm assembly 10 of the embodiment of the present invention, water can flow from the spray arm seat 12 through the water inlet shaft 112 to the spray arm 11, and the water jetting from the inside to the outside of the spray arm 11 can drive the spray arm 11 to rotate. When the spray arm 11 rotates, the ball 13 can achieve rolling friction between the spray arm 11 and the spray arm seat 12, so that the friction force between the spray arm 11 and the spray arm seat 12 is rolling friction. In this way, the power loss of driving the spray arm 11 to rotate is reduced, and the utilization rate of the power driving the spray arm 11 to rotate is improved, so that the water pressure is higher after being sprayed out from the spray hole of the spray arm 11, which is beneficial to increase the cleaning effect of the spray arm assembly 10.

[0034] Specifically, in some embodiments, the diameter of the ball 13 is 3 mm to 8 mm. The ball 13 can be a steel ball or a plastic ball, and the surface of the ball 13 can be coated with a lubricating material to reduce the rolling friction between the spray arm 11 and the spray arm seat 12, further improving the utilization rate of the power of the spray arm 11.

[0035] Please refer to Figure 2 and Figure 4 In some embodiments, a first ball groove 1122 is formed on the outer side surface of the water inlet shaft 112 along the circumference of the water inlet shaft 112 , and the balls 13 are partially accommodated in the first ball groove 1122 .

[0036] In this way, the ball 13 is partially located in the first ball groove 1122, which can maintain the stability of the cooperation between the ball 13 and the water inlet shaft 112, and the ball 13 is not easy to fall out. At the same time, it can limit the displacement of the spray arm 11 along the axis X direction of the water inlet shaft 112 to a certain extent, which is beneficial to improving the reliability of the spray arm assembly 10.

[0037] Specifically, the first ball groove 1122 is an annular groove along the outer side of the water inlet shaft 112, and the inner wall of the first ball groove 1122 is arc-shaped. In this way, the ball 13 cooperates with the inner wall of the first ball groove 1122, and the spray arm 11 can rotate smoothly around the axis X of the water inlet shaft 112.

[0038] In some embodiments, the spray arm assembly 10 includes a first connecting shaft 14, which is accommodated in the installation space 1222. The first connecting shaft 14 is located between the outer side surface of the water inlet shaft 112 and the inner side surface of the installation portion 122. The first connecting shaft 14 is provided with a first shaft through hole 142, and the water inlet shaft 112 passes through the first shaft through hole 142. The upper end of the first connecting shaft 14 is provided with a ball hole 144, and the ball 13 is partially accommodated in the ball hole 144.

[0039] In this way, the ball hole 144 can further limit the position of the ball 13. When assembling the spray arm assembly 10, the ball 13 is first installed on the first connecting shaft 14, and then the first connecting shaft 14 with the ball 13 is installed between the outer side surface of the water inlet shaft 112 and the inner side surface of the mounting portion 122, which is beneficial to the assembly of the spray arm assembly 10.

[0040] In some embodiments, the center of the ball hole 144 is horizontally aligned with the center of the first ball groove 1122. In this way, while the ball hole 144 limits the position of the ball 13, the ball 13 and the water inlet shaft 112 can contact and roll friction.

[0041] In some embodiments, there are multiple balls 13 and multiple ball holes 144, the balls 13 and the ball holes 144 correspond one to one, and the multiple balls 13 are evenly distributed along the circumference of the first connecting shaft 14. In this way, the multiple balls 13 are conducive to increasing the stability of the spray arm 11 rotation.

[0042] Specifically, in some embodiments, the number of the plurality of balls 13 is an even number. The plurality of ball holes are symmetrically distributed about the axis of the first connecting shaft 14, so that the plurality of balls 13 are symmetrically distributed about the axis of the first connecting shaft 14. In this way, when the spray arm 11 rotates, it can be ensured that the force on the part generating rolling friction is uniform, which is conducive to increasing the reliability of the spray arm assembly 10. In the embodiment of the present invention, the axis of the first connecting shaft 14 coincides with the axis X of the water inlet shaft 112.

[0043] Further, in one example, the number of the balls 13 is 4-12.

[0044] Of course, in other embodiments, the number of balls 13 and the number of ball holes 144 may not be limited to the embodiments discussed above, but may be flexibly configured as needed.

[0045] In some embodiments, the upper end of the first connecting shaft 14 is formed with a notch 146 at the upper part of the ball hole 144. In this way, when the ball 13 is installed on the first connecting shaft 14, the ball hole 144 can be slightly deformed by squeezing the ball 13, so that the ball 13 can be stably installed at the position of the ball hole 144, and the first connecting shaft 14 can simultaneously install multiple balls 13 between the outer side surface of the water inlet shaft 112 and the inner side surface of the mounting portion 122, which is convenient for the assembly of the spray arm assembly 10. When the first connecting shaft 14 is installed between the outer side surface of the water inlet shaft 112 and the inner side surface of the mounting portion 122, the ball 13 cooperates with the outer side surface of the water inlet shaft 112 and the inner side surface of the mounting portion 122 so that the ball 13 can resume rolling.

[0046] In some embodiments, the spray arm assembly 10 includes a second connecting shaft 15, which is at least partially accommodated in the installation space 1222. The second connecting shaft 15 is connected to the installation portion 122. The second connecting shaft 15 is provided with a second shaft through hole 152. The water inlet shaft 112 passes through the second shaft through hole 152. The ball 13 can be rollingly connected to the outer side surface of the water inlet shaft 112 and the inner side surface of the second connecting shaft 15.

[0047] In this way, the water inlet shaft 112 can rotate relative to the second connecting shaft 15, and the water inlet shaft 112 and the second connecting shaft 15 can achieve rolling friction with the ball 13. It can be understood that the spray arm seat 12 is usually fixedly installed in the cavity 20. When the spray arm assembly 10 is assembled, the spray arm 11, the second connecting shaft 15 and the ball 13 are assembled first. Since the spray arm 11 can rotate relative to the second connecting shaft 15, the rotation effect of the spray arm 11 can be tested first, and then the spray arm 11 is fixedly connected to the spray arm seat 12 through the second connecting shaft 15 after the test. The addition of the second connecting shaft 15 allows the spray arm 11 to be tested for its rotation effect before being installed on the spray arm seat 12, which is beneficial to the debugging of the rotation of the spray arm 11 and the assembly of the spray arm assembly 10.

[0048] In one embodiment, the second connecting shaft 15 is fixedly connected to the mounting portion 122. In another embodiment, the second connecting shaft 15 can also be connected to the mounting portion 122 in a relatively rotatable manner, or the second connecting shaft 15 and the mounting portion 122 can also be connected in a rolling manner.

[0049] In some embodiments, a second ball groove 154 is formed on the inner side surface of the second connecting shaft 15 along the circumference of the second connecting shaft 15 , and the balls 13 are partially accommodated in the second ball groove 154 .

[0050] In this way, the second ball groove 154 can limit the position of the ball 13, and to a certain extent limit the displacement of the spray arm 11 in the axis X direction of the water inlet shaft 112, so that the cooperation between the ball 13 and the second connecting shaft 15 and the water inlet shaft 112 is more stable.

[0051] Specifically, the second ball groove 154 is an annular groove along the inner side of the second connecting shaft 15, and the inner wall of the second ball groove 154 is arc-shaped. In this way, the ball 13 cooperates with the inner wall of the second ball groove 154, so that the spray arm 11 can rotate smoothly around the axis X of the water inlet shaft 112.

[0052] Furthermore, in the illustrated embodiment of the present invention, the water inlet shaft 112 is provided with a first ball groove 1122 and the second connecting shaft 15 is provided with a second ball groove 154, and the first ball groove 1122 and the second ball groove 154 are located on opposite sides of the ball. In this way, the first ball groove 1122 and the second ball groove 154 can jointly limit the position of the ball between the outer side surface of the water inlet shaft 112 and the second connecting shaft 15, so that the spray arm 11 can rotate more smoothly.

[0053] Preferably, the first ball groove 1122 and the second ball groove 154 are horizontally aligned. In this way, the cooperation between the ball 13 and the first ball groove 1122 and the second ball groove 154 is more stable.

[0054] In the illustrated embodiment, the number of the first ball groove 1122 and the number of the second ball groove 154 are both one. In other embodiments, the number of the first ball groove 1122 and the second ball groove 154 may not be limited to one. For example, a plurality of first ball grooves 1122 may be formed on the outer side surface of the water inlet shaft 112 along the direction of the axis X of the water inlet shaft 112, and correspondingly, a plurality of second ball grooves 154 may be formed on the inner side surface of the second connecting shaft 15 along the axis direction of the second connecting shaft 15. The plurality of first ball grooves 1122 and the plurality of second ball grooves 154 correspond one to one, and the ball 13 is located between the plurality of first ball grooves 1122 and the plurality of second ball grooves 154. In this way, the stability of the connection of the spray arm 11 can be increased, and the spray arm 11 rotates more smoothly, which is conducive to improving the reliability of the spray arm assembly 10.

[0055] In some embodiments, a flange 156 protruding toward the axis of the second connecting shaft 15 is formed at the upper end of the second connecting shaft 15 , and the flange 156 partially blocks the ball 13 .

[0056] In this way, the flange 156 can shield the ball 13 so that the ball 13 is better accommodated between the second connecting shaft 15 and the water inlet shaft.

[0057] Specifically, the aperture of the second shaft through hole 152 formed by the flange 156 at the upper end of the second connecting shaft 15 is adapted to the outer diameter of the water inlet shaft 112, so that the water inlet shaft 112 can be at least partially accommodated in the second shaft through hole 152, and the flange 156 and the ball 13 cooperate to reduce the shaking of the spray arm 11 when the water inlet shaft 112 is installed in the second shaft through hole 152. At the same time, the flange 156 and the water inlet shaft 112 cooperate to prevent debris from entering the second shaft through hole 152 from the upper end of the second connecting shaft 15 and jamming the ball 13, which is conducive to increasing the reliability of the spray arm assembly 10. The flange 156 and the second connecting shaft 15 can be an integrally formed structure or the flange 156 can be detachably installed on the upper end of the second connecting shaft 15.

[0058] In some embodiments, the spray arm 12 includes two sub-arms 114 symmetrically arranged relative to the water inlet shaft 112, and the upper end surface of the second connecting shaft 15 is spaced from the lower surface of the sub-arm 114. The spacing between the upper end surface of the second connecting shaft 15 and the lower surface of the sub-arm 114 can prevent the lower surface of the sub-arm 114 from contacting the second connecting shaft 15, and when the spray arm 11 rotates, the lower surface of the sub-arm 114 will not generate sliding friction with the spray arm seat 12, further reducing the power loss of driving the spray arm 11 to rotate, improving the utilization rate of the power driving the spray arm 11 to rotate, so that the water has a higher pressure after being sprayed out from the spray hole of the spray arm 11, which is conducive to increasing the cleaning effect of the spray arm assembly 10.

[0059] Specifically, in one example, an upper surface of the flange 156 is spaced apart from a lower surface of the sub-arm 114 .

[0060] In other embodiments, the number of the sub-arms 114 is not limited to two, and three or more sub-arms 114 may be provided according to actual needs, which is not specifically limited here.

[0061] In some embodiments, the outer side surface of the second connecting shaft 15 is formed with a thread 158, and the inner side surface of the mounting portion 122 is correspondingly formed with a thread. In this way, the second connecting shaft 15 and the mounting portion 122 are fixedly connected by threaded engagement.

[0062] Of course, in other embodiments, the second connecting shaft 15 and the mounting portion 122 may also be fixedly connected by snap-fit ​​connection, interference fit connection or other connection methods, which are not specifically limited here.

[0063] It should be noted that, in some embodiments, the spray arm assembly 10 may omit the second connecting shaft 15, and the second ball groove 154 may be formed on the inner side of the mounting portion 122. Similarly, the spray arm 11 can be smoothly rotated relative to the spray arm seat 12 around the axis X of the water inlet shaft 112. Accordingly, the flange 156 can be located at the upper end of the mounting portion 122 and partially shield the ball 13. Among them, the flange 156 can be designed to be detachably mounted on the upper end of the mounting portion 122, so that the ball 13 can be easily installed from the top of the mounting space 1222 to between the inner side of the mounting portion 122 and the outer side of the water inlet shaft 112.

[0064] Further, in the illustrated embodiment, the first connecting shaft 14 is located between the outer side of the water inlet shaft 112 and the inner side of the second connecting shaft 15. In this way, the first connecting shaft 14 with the ball 13 can be installed between the outer side of the water inlet shaft 112 and the inner side of the second connecting shaft 15, which is convenient for assembling the spray arm assembly 10.

[0065] In some embodiments, the spray arm seat 12 includes a water inlet portion 124 connected to the mounting portion 122, the water inlet shaft 112 and the water inlet portion 124 are coaxially arranged, the water inlet shaft 112 is provided with a first water inlet hole 1124, and the water inlet portion 124 is provided with a second water inlet hole 1242, and the aperture D1 of the first water inlet hole 1124 is equal to the aperture D2 of the second water inlet hole 1242.

[0066] It can be understood that the water inlet portion 124 and the water inlet shaft 112 can be in the shape of a circular tube. The coaxial arrangement of the water inlet shaft 112 and the water inlet portion 124 can align the first water inlet hole 1124 and the second water inlet hole 1242. In this way, water flowing out of the second water inlet hole 1242 can smoothly enter the first water inlet hole 1124 and reach the spray arm 11, thereby keeping the water flow in the spray arm assembly 10 stable and unobstructed.

[0067] Please combine Figure 4 In some embodiments, the spray arm seat 12 includes a step portion 126 connecting the mounting portion 122 and the water inlet portion 124 , and a gap d of 0.4 to 2.2 mm is formed between the bottom of the water inlet shaft 112 and the step portion 126 .

[0068] In this way, the gap d can prevent the bottom of the water inlet shaft 112 from contacting the spray arm seat 12. When the spray arm 11 rotates, the bottom of the water inlet shaft 112 will not generate sliding friction with the spray arm seat 12, further reducing the power loss of driving the spray arm 11 to rotate, improving the utilization rate of the power driving the spray arm 11 to rotate, making the water pressure greater after being sprayed out from the spray hole of the spray arm 11, which is conducive to increasing the cleaning effect of the spray arm assembly 10. In addition, a smaller gap d can reduce the outflow of water from the gap d, and at the same time prevent impurities in the water from entering the installation part 122 of the water inlet shaft 112 from the gap d to affect the rolling of the ball 13.

[0069] In some embodiments, please combine Figure 4 The second connecting shaft 15 and the first connecting shaft 14 are arranged above the step portion 126 .

[0070] Please combine Figure 6 The washing appliance 100 according to the embodiment of the present invention comprises a cavity 20 and a spray arm assembly 10 according to any one of the above embodiments. The spray arm assembly 10 is installed in the cavity 20 , and the spray arm 11 is located in the cavity 20 .

[0071] In the above-mentioned washing appliance 100, when the spray arm 11 of the spray arm assembly 10 rotates, the ball bearing 13 can realize the rolling friction between the spray arm 11 and the spray arm seat 12, so that the friction between the spray arm 11 and the spray arm seat 12 is rolling friction, thus reducing the power loss of driving the spray arm 11 to rotate, improving the utilization rate of the power driving the spray arm 11 to rotate, making the water pressure greater after being sprayed out from the spray hole of the spray arm 11, which is beneficial to increase the cleaning effect of the spray arm assembly 10 and the washing appliance 100. Among them, since the spray arm assembly 10 is assembled using the ball bearing 13, the required installation space 1222 is smaller, which can save the internal space of the washing appliance 100 and increase the loading capacity of the cavity 20 by 10mm to 40mm. The cavity 20 is used to place items that need to be washed, such as tableware.

[0072] In the illustrated embodiment, the spray arm assembly 10 is the lower spray arm assembly 10 of the washing appliance 100, which is installed at the bottom of the cavity 20. In other embodiments, the spray arm assembly 10 can also be used as a spray arm assembly 10 in other positions, such as an upper spray arm 11, a middle spray arm 11, etc., and accordingly, the spray arm assembly 10 can be installed on the top, side wall, etc. of the cavity 20, which is not specifically limited here.

[0073] The washing appliance 100 may be a washing appliance such as a dishwasher that uses a spray arm 11 to wash items.

[0074] In the description of this specification, the description with reference to the terms "certain embodiments", "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiments or examples are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present invention have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A washing appliance, characterized in that: The spray arm assembly comprises a cavity and a spray arm assembly, wherein the spray arm assembly is installed in the cavity, the spray arm assembly comprises a spray arm and a spray arm seat, the spray arm seat comprises a mounting portion, the mounting portion is provided with a mounting space, the spray arm is provided with a water inlet shaft, the water inlet shaft is at least partially installed in the mounting space, a ball bearing is provided between the outer side surface of the mounting space and the inner side surface of the mounting portion, and the ball bearing can rollably connect the water inlet shaft and the mounting portion; The spray arm seat comprises a water inlet portion connected to the mounting portion, the water inlet shaft is provided with a first water inlet through hole, the water inlet portion is provided with a second water inlet through hole, and water flowing out of the second water inlet through hole reaches the spray arm through the first water inlet through hole; The spray arm assembly includes a first connecting shaft, the first connecting shaft is accommodated in the installation space, the first connecting shaft is located between the outer side surface of the water inlet shaft and the inner side surface of the installation portion, the first connecting shaft is provided with a first shaft through hole, the water inlet shaft passes through the first shaft through hole, the upper end of the first connecting shaft is provided with a ball hole, the ball is partially accommodated in the ball hole, The spray arm assembly includes a second connecting shaft, which is at least partially accommodated in the installation space. The second connecting shaft is provided with a second shaft through hole. The second connecting shaft is sleeved on the outer side of the first connecting shaft. The water inlet shaft passes through the second shaft through hole. The ball can rollingly connect the outer side of the water inlet shaft and the inner side of the second connecting shaft to enable the water inlet shaft to rotate relative to the second connecting shaft.

2. The washing appliance according to claim 1, characterized in that: The number of the ball holes is multiple, the balls correspond to the ball holes one by one, and the multiple balls are evenly distributed along the circumference of the first connecting shaft.

3. The washing appliance according to claim 1, characterized in that: The water inlet shaft and the water inlet portion are coaxially arranged, and the axis of the first connecting shaft coincides with the axis X of the water inlet shaft.

4. The washing appliance according to claim 1, characterized in that: The upper end of the first connecting shaft is formed with a notch at the upper part of the ball hole, and / or the ball can be a steel ball or a plastic ball.

5. The washing appliance according to claim 1, characterized in that: A second ball groove is formed on the inner side surface of the second connecting shaft along the circumference of the second connecting shaft, and the balls are partially accommodated in the second ball groove.

6. The washing appliance according to claim 5, characterized in that: The second ball groove is an annular groove along the inner side surface of the second connecting shaft, and the inner wall of the second ball groove is arc-shaped. The ball and the inner wall of the second ball groove cooperate to enable the spray arm to rotate around the axis X of the water inlet shaft.

7. The washing appliance according to claim 1, characterized in that: The spray arm seat comprises a step portion connecting the mounting portion and the water inlet portion, and the second connecting shaft and the first connecting shaft are arranged above the step portion.

8. The washing appliance according to claim 1, characterized in that: The upper part of the mounting portion is provided with a flange for shielding the ball bearings, and the flange is detachably mounted on the upper end of the mounting portion.

9. The washing appliance according to claim 8, characterized in that: The spray arm comprises two sub-arms symmetrically arranged relative to the water inlet axis, and the upper end surface of the flange is spaced from the lower surface of the sub-arms.

10. The washing appliance according to claim 1, characterized in that: The spray arm assembly is a lower spray arm assembly of a washing appliance, and the lower spray arm assembly is installed at the bottom of a cavity.

Images