A spray arm assembly and a dishwasher

Abstract

This utility model provides a spray arm assembly and a dishwasher. The spray arm assembly includes a spray arm, a fixing member, and a connecting member. The spray arm is a metal component and has a mounting hole and a spray hole. The fixing member is disposed within the mounting hole and has a mating hole. At least a portion of the connecting member is rotatably disposed within the mating hole. The spray arm and the fixing member rotate relative to the connecting member. The connecting member is used to connect a water supply pipe, and the water supplied by the water supply pipe is sprayed out through the spray hole. This utility model addresses the technical problem of complex assembly in metal top spray arms.

Description

Technical Field

[0001] This utility model relates to the field of kitchen appliance technology, and in particular to a spray arm assembly and a dishwasher. Background Technology

[0002] In modern family kitchens, dishwashers have become an indispensable cleaning appliance. The spray arm assembly, as one of the core components of a dishwasher, ensures that dishes and cookware are thoroughly cleaned through high-pressure water jets and detergent spray.

[0003] In traditional dishwashers, the top spray arm assembly is typically made of plastic or a simple nozzle structure. While this offers advantages in cost and manufacturing, plastic spray arm assemblies have a less refined appearance and can usually withstand lower water pressure, resulting in less than ideal cleaning performance. Some dishwashers use metal top spray arm assemblies; however, metal top spray arm assemblies are complex to assemble and have low assembly efficiency.

[0004] Therefore, there is an urgent need to solve the technical problem of complex assembly of the top spray arm assembly made of metal in dishwashers. Utility Model Content

[0005] This utility model provides a spray arm assembly and a dishwasher to solve the technical problem of complex assembly of metal top spray arm assemblies.

[0006] To achieve the above objectives, this utility model provides a spray arm assembly, comprising:

[0007] The spray arm is a metal part, and the spray arm has mounting holes and spray holes inside;

[0008] A fastener is provided in the mounting hole, and a mating hole is provided in the fastener;

[0009] A connector, at least a portion of which is rotatably disposed within the mating hole, wherein the spray arm and the fixing member rotate relative to the connector, the connector being used to connect a water supply pipe, and the water supplied by the water supply pipe being sprayed out through the spray hole.

[0010] This utility model provides a spray arm assembly, including a spray arm, a fixing member, and a connecting member. The fixing member is disposed in a mounting hole, and at least part of the connecting member is rotatably disposed in a mating hole. The spray arm and the fixing member rotate relative to the connecting member, enabling the spray arm to rotate freely during operation, ensuring uniform water flow distribution, and improving cleaning effect. By reducing unnecessary complex structures, the structure is simplified, and assembly is more convenient. This not only reduces production costs but also reduces the error rate during assembly, greatly improving production efficiency.

[0011] In one possible implementation, the fastener includes a fixing tube and a force-applying portion disposed around the periphery of the fixing tube, the fixing tube extending into the mounting hole and being detachably connected to the mounting hole.

[0012] In one possible implementation, the spray arm is provided with a first limiting structure, and the side of the force-applying part facing the spray arm is provided with a second limiting structure.

[0013] One of the first limiting structure and the second limiting structure is a limiting groove, and the other of the first limiting structure and the second limiting structure is a limiting protrusion. The limiting protrusion is embedded in the limiting groove to prevent the fixing member from rotating relative to the spray arm.

[0014] In one possible implementation, the mating hole is located inside the fixing tube, and the inner wall of the mating hole is provided with an anti-detachment protrusion. The connector includes a snap-fit ​​portion that extends into the mating hole and engages with the anti-detachment protrusion.

[0015] In one possible implementation, the surface of the spray arm has a boss, the spray hole is formed within the boss, and the opening of the spray hole is inclined relative to the surface of the spray arm.

[0016] In one possible implementation, the boss has a spray surface and a transition surface, the spray surface being an inclined surface, one end of the spray surface being connected to the lower surface of the spray arm, the other end of the spray surface being connected to the lower surface of the spray arm via the transition surface, and the spray hole being formed within the spray surface.

[0017] In one possible implementation, the tilt angle α of the spray surface relative to the lower surface of the spray arm satisfies: 0 < a ≤ 30°.

[0018] In one possible implementation, the end of the spray arm furthest from the mounting hole is arc-shaped.

[0019] In one possible implementation, the connector has a connecting hole with a threaded inner wall, and the connecting hole is used to engage with the threaded connection of the water supply pipe.

[0020] This application also provides a dishwasher, including the above-described spray arm assembly.

[0021] The spray arm assembly and dishwasher provided by this utility model, by fastening the snap-fit ​​part of the connector to the anti-detachment protrusion of the fixing part, does not affect the relative rotational movement of the connector and the fixing part, and can also provide additional mechanical locking force to ensure a stable connection between the connector and the fixing part, preventing the connector from detaching from the fixing part under high-pressure water flow or vibration, thereby effectively solving the problem of the spray arm easily falling off and improving the safety of use. In addition, this snap-fit ​​structure makes the installation process of the connector simple and quick, without the need for additional tools, and is suitable for rapid assembly and maintenance.

[0022] The spray arm assembly and dishwasher provided by this utility model have a relative movement between the fixing part and the connecting part. The unevenness or burrs on the metal surface of the spray arm will not affect the normal rotation movement, thus ensuring the smooth rotation of the spray arm.

[0023] In addition to the technical problems solved by the embodiments of the present invention, the technical features constituting the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions described above, other technical problems that can be solved by the spray arm assembly and dishwasher provided by the embodiments of the present invention, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further explained in detail in the specific embodiments. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 An exploded view of the spray arm assembly provided in an embodiment of this utility model;

[0026] Figure 2 A three-dimensional structural schematic diagram of the spray arm assembly provided in an embodiment of this utility model;

[0027] Figure 3 A three-dimensional structural diagram of the spray arm and fixing member of the spray arm assembly provided in the embodiment of this utility model;

[0028] Figure 4 A three-dimensional structural diagram of the spray arm of the spray arm assembly provided in an embodiment of this utility model;

[0029] Figure 5 for Figure 2 Enlarged view of the structure at point A;

[0030] Figure 6 A cross-sectional view of the spray arm assembly provided in an embodiment of this utility model;

[0031] Figure 7 for Figure 6 Enlarged view of the structure at point C;

[0032] Figure 8 A three-dimensional structural diagram of the connector of the spray arm assembly provided in an embodiment of this utility model;

[0033] Figure 9 for Figure 6 Enlarged view of the structure at point D;

[0034] Figure 10 for Figure 2 Enlarged view of the structure at point B.

[0035] Explanation of reference numerals in the attached figures:

[0036] 10-Spray arm;

[0037] 11-Mounting holes;

[0038] 12-First limiting structure;

[0039] 13-Injection hole;

[0040] 14 - Upper shell;

[0041] 15-Lower housing;

[0042] 16-Boss;

[0043] 161 - Spraying surface;

[0044] 162 - Transition surface;

[0045] 17-Cavity;

[0046] 20-Fasteners;

[0047] 21-Fixed tube;

[0048] 22-Force application unit;

[0049] 221 - Second limiting structure;

[0050] 23-Matching hole;

[0051] 231-Anti-detachment ridge;

[0052] 30 - Connector;

[0053] 31 - Connection hole;

[0054] 32-Snap fastener. Detailed Implementation

[0055] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0056] In dishwashers, the spray arm typically has multiple nozzles for spraying water. During operation, the spray arm rotates, and the nozzles spray water to clean the dishes. Traditional spray arms are generally made of plastic, which can withstand lower water pressure, and the internal cavity of the spray arm is small, which can only hold a small water flow, affecting the cleaning effect and resulting in low cleaning efficiency. On the other hand, the assembly of metal spray arms is more complex, making it difficult to improve production efficiency.

[0057] In view of this, the present invention provides a spray arm assembly and a dishwasher, wherein a spray arm assembly includes: a spray arm, a fixing member, and a connecting member. The fixing member is disposed in a mounting hole, and at least part of the connecting member is rotatably disposed in a mating hole. The spray arm and the fixing member rotate relative to the connecting member, thereby enabling the spray arm to rotate freely during operation, ensuring uniform water flow distribution, improving cleaning effect, and simplifying the structure by reducing unnecessary complex structures, making assembly more convenient. This not only reduces production costs but also reduces the error rate during assembly, greatly improving production efficiency.

[0058] The spray arm assembly and dishwasher provided in the embodiments of this utility model are described below with reference to the accompanying drawings.

[0059] refer to Figure 1 and Figure 2 As shown, this utility model embodiment provides a spray arm assembly, including: a spray arm 10, a fixing member 20, and a connecting member 30. The spray arm 10 is a metal part, and the spray arm 10 has a mounting hole 11 and a spray hole 13. The fixing member 20 is disposed in the mounting hole 11, and a mating hole 23 is provided in the fixing member 20. At least part of the connecting member 30 is rotatably disposed in the mating hole 23. The spray arm 10 and the fixing member 20 rotate relative to the connecting member 30. The connecting member 30 is used to connect a water supply pipe, and the water flow provided by the water supply pipe is sprayed out through the spray hole 13.

[0060] This utility model provides a spray arm assembly, including a spray arm 10, a fixing member 20, and a connecting member 30. The fixing member 20 is disposed in the mounting hole 11, and the connecting member 30 is rotatably disposed in the mating hole 23. The spray arm 10 and the fixing member 20 rotate relative to the connecting member 30, which enables the spray arm 10 to rotate freely during operation, ensuring uniform water flow distribution and improving cleaning effect. By reducing unnecessary complex structures, the structure is simplified, and assembly is more convenient. This not only reduces production costs but also reduces the error rate during assembly, greatly improving production efficiency.

[0061] In one possible implementation, the spray arm 10 can be made of sheet metal, which not only extends its service life but also enhances its aesthetics, meeting users' high demands for the dishwasher's appearance. Of course, the spray arm 10 can also be made of stainless steel, copper alloy, etc.

[0062] The connector 30 is used to connect the water supply pipe, which provides a continuous flow of water. The water enters the spray arm 10 through the connector 30 and is finally sprayed out through the spray hole 13, achieving an efficient cleaning process. The connector 30 is rotatably disposed within the mating hole 23, allowing the spray arm 10 to rotate freely during operation without affecting the continuous water flow provided by the water supply pipe, ensuring that the water flow can be smoothly transmitted from the water supply pipe to the spray arm 10.

[0063] In one possible implementation method, refer to Figure 1 and Figure 3 As shown, the fastener 20 includes a fixing tube 21 and a force-applying part 22 disposed around the fixing tube 21. The fixing tube 21 extends into the mounting hole 11 and is detachably connected to the mounting hole 11. The force-applying part 22 blocks the connection between the fixing tube 21 and the mounting hole 11, improving the reliability of use.

[0064] In one possible implementation, the mounting hole 11 may be a circular hole, and the fixing tube 21 may be a hollow cylinder.

[0065] In one possible implementation, the outer wall of the fixing tube 21 has external threads, and the inner wall of the mounting hole 11 has internal threads. The fixing tube 21 and the mounting hole 11 can be detachably connected by thread engagement. Thread engagement provides strong mechanical locking force, facilitates the installation and removal of the fixing member 20 without the need for complex tools, and reduces maintenance costs and user inconvenience.

[0066] In other possible implementations, the fixing tube 21 can also be connected to the inner wall of the mounting hole 11 via an elastic snap-fit ​​structure. For example, the fixing tube 21 is connected to an elastic snap-fit, and the inner wall of the mounting hole 11 has a corresponding groove, so that the fixing member 20 can be detachably connected to the mounting hole 11.

[0067] In one possible implementation, the fixing tube 21 and the force-applying part 22 on the periphery can be an integrally connected structure, which reduces the number of parts and simplifies the assembly process, reduces production and maintenance costs, and makes the use more stable. This allows the fixing part 20 to better withstand vibration and pressure changes during operation, reducing the problem of the spray arm 10 loosening or falling off.

[0068] In one possible implementation, the edge of the force-applying part 22 has spaced-apart protrusions and notches. During assembly, these protrusions provide additional gripping points, and fingers can be inserted into the notches, allowing for better force application when the fastener 20 is screwed into the mounting hole 11, reducing the possibility of slippage and simplifying the assembly process.

[0069] In one possible implementation, the spray arm 10 is provided with a first limiting structure 12, and the force-applying part 22 facing the spray arm 10 is provided with a second limiting structure 221. One of the first limiting structure 12 and the second limiting structure 221 is a limiting groove, and the other of the first limiting structure 12 and the second limiting structure 221 is a limiting protrusion. The limiting protrusion is embedded in the limiting groove to prevent the fixing member 20 from rotating relative to the spray arm 10, thereby reducing the wear problem caused by the relative movement of the fixing member 20 and the spray arm 10, ensuring the stability and reliability of the spray arm 10, and improving its service life.

[0070] In one possible implementation, the first limiting structure 12 is a limiting groove, and the second limiting structure 221 is a limiting protrusion; or, the second limiting structure 221 is a limiting groove, and the first limiting structure 12 is a limiting protrusion. This physical restriction prevents the fixing member 20 from rotating relative to the spray arm 10 during operation.

[0071] In one possible implementation, the limiting protrusion can be cylindrical, hemispherical, elliptical, etc., and the shape of the limiting groove matches the shape of the limiting protrusion. The position of the limiting groove corresponds to the position of the limiting protrusion, ensuring that the limiting protrusion can be accurately embedded in the limiting groove.

[0072] In one possible implementation method, refer to Figure 1 and Figure 6 As shown, the spray arm 10 includes an upper housing 14 and a lower housing 15. The upper housing 14 and the lower housing 15 can be connected together by a riveting process. The upper housing 14 and the lower housing 15 form a cavity 17, which is the main channel for water flow inside the spray arm 10, ensuring that the water flow can be evenly distributed inside the spray arm 10.

[0073] Compared to plastic materials, the metal spray arm 10 has a larger internal cavity 17, allowing more water to enter and increasing the amount of water sprayed per unit time, thereby improving cleaning efficiency and cleaning effect.

[0074] refer to Figure 1 , Figure 2 and Figure 3 As shown, the mounting hole 11 is located inside the upper housing 14, and the spray hole 13 can be located in the lower housing 15. There can be multiple spray holes 13. Water supplied by the water supply pipe enters the cavity 17 of the spray arm 10 through the connecting hole 31, and then the water is sprayed out from the spray holes 13, directly acting on the surface of the tableware to achieve the cleaning function. Alternatively, the mounting hole 11 can also be located inside the lower housing 15, and the spray hole 13 can be located in the upper housing 14.

[0075] In one possible implementation, the spray arm 10 may be in a straight line shape, with the mounting hole 11 located at the center of the length direction of the spray arm 10; the spray arm 10 may also be in a Y-shape, with the mounting hole 11 located at the center of the spray arm 10.

[0076] In one possible implementation method, refer to Figure 1 , Figure 6 and Figure 7 As shown, the mating hole 23 is located inside the fixing tube 21, and the inner wall of the mating hole 23 is provided with an anti-detachment protrusion 231. The connector 30 includes a snap-fit ​​part 32, which extends into the mating hole 23 and engages with the anti-detachment protrusion 231.

[0077] In one possible implementation method, refer to Figure 1 and Figure 7 As shown, the anti-detachment protrusion 231 protrudes from the inner wall of the mating hole 23 and runs around the circumference of the mating hole 23.

[0078] In one possible implementation method, refer to Figure 1 , Figure 7 and Figure 8 As shown, the number of snap-fit ​​parts 32 can be 2, 3, 4 or more, and they are arranged at intervals to improve the stability of the connection.

[0079] During installation, the snap-fit ​​part 32 enters the mating hole 23 through elastic deformation and returns to its original shape after passing the anti-detachment protrusion 231. The anti-detachment protrusion 231 provides a physical barrier to prevent the snap-fit ​​part 32 from dislodging out of the mating hole 23 when subjected to external force, thereby preventing the connector 30 from separating from the fastener 20.

[0080] This application, by fastening the snap-fit ​​portion 32 of the connector 30 to the anti-detachment protrusion 231 of the fixing member 20, does not affect the relative rotational movement of the connector 30 and the fixing member 20, and also provides additional mechanical locking force to ensure a stable connection between the connector 30 and the fixing member 20, preventing the connector 30 from detaching from the fixing member 20 under high-pressure water flow or vibration, thereby effectively solving the problem of the spray arm 10 easily falling off and improving the safety of use. In addition, this snap-fit ​​structure makes the installation process of the connector 30 simple and quick, requiring no additional tools, and is suitable for rapid assembly and maintenance.

[0081] In one possible implementation method, refer to Figure 6 and Figure 9 As shown, the surface of the spray arm 10 has a boss 16, and spray holes 13 are formed within the boss 16. The opening of the spray holes 13 is inclined relative to the surface of the spray arm 10. This helps to optimize the spray direction of the water flow and reduce the stress during the forming of the boss 16.

[0082] In one possible implementation, the boss 16 may be located on the upper surface of the spray arm 10, or on the lower surface of the spray arm 10, or the boss 16 may be distributed on both the upper and lower surfaces of the spray arm 10.

[0083] In this example, the boss 16 is located in the lower housing 15, and the lower surface of the spray arm 10 is the lower surface of the spray arm 10.

[0084] In one possible implementation method, refer to Figure 6 and Figure 9 As shown, the boss 16 has a spray surface 161 and a transition surface 162. The spray surface 161 is an inclined surface. One end of the spray surface 161 is connected to the lower surface of the spray arm 10, and the other end of the spray surface 161 is connected to the lower surface of the spray arm 10 through the transition surface 162. The spray hole 13 is opened in the spray surface 161.

[0085] In one possible implementation, the spraying surface 161 is an inclined surface and the transition surface 162 is an arc surface, which helps to reduce stress concentration, reduce the problem of cracking of the boss 16, ensure that the material of the spray arm 10 flows more smoothly during the stretching and forming process, reduce the deformation resistance of the material, and reduce the processing difficulty.

[0086] In one possible implementation, the tilt angle α of the spray surface 161 relative to the lower surface of the spray arm 10 satisfies: 0 < α ≤ 30°.

[0087] If the tilt angle 'a' is too small, it will affect the angle of the water jet from the spray hole 13, impacting the water's coverage of the tableware surface and hindering cleaning effectiveness. If the tilt angle 'a' is too large, it may increase the impact force of the water jet on the spray surface 161. Furthermore, the stress on the material around the spray hole 13 will increase, especially when high-pressure water flows through, potentially leading to material fatigue and cracking, causing the spray hole 13 to crack and affecting its use.

[0088] In one possible implementation, the tilt angle α can be, for example, 10°, 15°, 20°, 25°, or 30°. This ensures that when the spray arm 10 is made of metal, the spray nozzle 13 will not crack during the forming process.

[0089] In one possible implementation, the distance h between the highest protruding position of the boss 16 and the lower surface of the spray arm 10 satisfies: 0 < h ≤ 2 mm. If the distance h is too small, it will not be conducive to improving the cleaning effect; if the distance h is too large, it will easily cause the spray hole 13 to crack.

[0090] In one possible implementation, the distance h can be, for example, 0.8 mm, 1 mm, 1.3 mm, 1.5 mm, 1.8 mm, or 2 mm.

[0091] In one possible implementation method, refer to Figure 2 and Figure 10 As shown, the end of the spray arm 10 furthest from the mounting hole 11 is rounded. This ensures that the spray arm 10 moves more smoothly during the stretching and forming process.

[0092] In one possible implementation method, refer to Figure 7 As shown, the connector 30 has a connecting hole 31, the inner wall of which has threads. The connecting hole 31 is used to engage with the threads of the water supply pipe. It is easy to understand that the outer wall of the water supply pipe has external threads, thereby enabling the connecting hole 31 to engage with the threads of the water supply pipe, and thus fixing the water supply pipe relative to the connecting hole 31.

[0093] In one possible implementation, the spray arm 10 could be made of stainless steel 430, which is less expensive than stainless steel 304.

[0094] Since the 430 material itself has poor tensile properties, by setting the spray surface 161 as an inclined surface and opening the spray hole 13 inside the spray surface 161, the problem of local cracking around the spray hole 13 is solved.

[0095] During assembly, the fixing tube 21 of the fixing member 20 is aligned with the mounting hole 11 of the spray arm 10 and screwed in. When it is screwed in, the fixing member 20 will deform. At this time, the second limiting structure 221 located on the fixing member 20 and the first limiting structure 12 located on the spray arm 10 cooperate with each other to prevent the fixing member 20 from rotating relative to the spray arm 10 during operation.

[0096] Next, the snap-fit ​​part 32 of the connector 30 is inserted into the mating hole 23 of the fixing part 20. The snap-fit ​​part 32 deforms and engages with the anti-detachment protrusion 231, so that the fixing part 20 together with the spray arm 10 can rotate around the central axis of the connector 30.

[0097] The fixing part 20 and the connecting part 30 are made of plastic. As the fixing part 20 rotates together with the spray arm 10, the fixing part 20 and the connecting part 30 move relative to each other. The unevenness or burrs on the metal surface of the spray arm 10 will not affect the normal rotation.

[0098] This utility model embodiment also provides a dishwasher, including the above-described spray arm assembly.

[0099] The aforementioned spray arm assembly can be a top spray arm assembly, installed on the inner top wall of the inner liner.

[0100] The dishwasher also includes an inner tub with a storage space inside, which has shelves for placing dishes.

[0101] The dishwasher also includes a water pump, a piping unit, and a lower spray arm. The upper spray arm and the lower spray arm are rotatably mounted within the receiving space. The water pump supplies water to the piping unit, and the water flows along the piping unit into the lower spray arm and the upper spray arm. The water is then sprayed out through the spray holes 13 of the lower spray arm and the upper spray arm, respectively, towards the shelf to clean the dishes placed inside the shelf assembly.

[0102] The other structural features of the dishwasher are similar to those in the existing design and will not be described in detail here.

[0103] It should be noted that the numerical values ​​and ranges involved in this application are approximate values. Due to the influence of the manufacturing process, there may be a certain range of errors, which can be considered negligible by those skilled in the art.

[0104] In the description of this utility model, it should be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", etc., used to indicate the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the indicated position or component must have a specific orientation, or a specific structure and operation, and therefore should not be construed as a limitation of this utility model.

[0105] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0106] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows for communication; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0107] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0108] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A spray arm assembly, characterized by include: Spray arm (10), the spray arm (10) is a metal part, and the spray arm (10) has a mounting hole (11) and a spray hole (13). The fastener (20) is disposed in the mounting hole (11) and the fastener (20) has a mating hole (23). The connector (30) is rotatably disposed within the mating hole (23), the spray arm (10) and the fixing member (20) rotate relative to the connector (30), the connector (30) is used to connect the water supply pipe, and the water flow provided by the water supply pipe is sprayed out through the spray hole (13).

2. The spray arm assembly of claim 1, wherein, The fastener (20) includes a fixing tube (21) and a force-applying part (22) disposed around the fixing tube (21). The fixing tube (21) extends into the mounting hole (11) and is detachably connected to the mounting hole (11).

3. The spray arm assembly of claim 2, wherein, The spray arm (10) is provided with a first limiting structure (12), and the side of the force-applying part (22) facing the spray arm (10) is provided with a second limiting structure (221). One of the first limiting structure (12) and the second limiting structure (221) is a limiting groove, and the other of the first limiting structure (12) and the second limiting structure (221) is a limiting protrusion. The limiting protrusion is embedded in the limiting groove to prevent the fixing member (20) from rotating relative to the spray arm (10).

4. The spray arm assembly of claim 2, wherein, The mating hole (23) is located inside the fixing tube (21), and the inner wall of the mating hole (23) is provided with an anti-detachment protrusion (231). The connector (30) includes a snap-fit ​​part (32), which extends into the mating hole (23) and engages with the anti-detachment protrusion (231).

5. The spray arm assembly of any one of claims 1-4, wherein, The surface of the spray arm (10) has a boss (16), and the spray hole (13) is opened in the boss (16). The opening of the spray hole (13) is inclined relative to the surface of the spray arm (10).

6. The spray arm assembly of claim 5, wherein, The boss (16) has a spray surface (161) and a transition surface (162). The spray surface (161) is an inclined surface. One end of the spray surface (161) is connected to the lower surface of the spray arm (10). The other end of the spray surface (161) is connected to the lower surface of the spray arm (10) through the transition surface (162). The spray hole (13) is opened in the spray surface (161).

7. The spray arm assembly of claim 6, wherein, The tilt angle α of the spray surface (161) relative to the lower surface of the spray arm (10) satisfies: 0 < a ≤ 30°.

8. The spray arm assembly of any one of claims 1-4, wherein, The end of the spray arm (10) away from the mounting hole (11) is arc-shaped.

9. The spray arm assembly of any one of claims 1-4, wherein, The connector (30) has a connecting hole (31) inside, and the inner wall of the connecting hole (31) has threads. The connecting hole (31) is used to be threadedly connected to the water supply pipe.

10. A dishwasher, characterized in that Includes the spray arm assembly as described in any one of claims 1-9.

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