Spray arm assembly and flushing machine

Abstract

The present application discloses a spray arm assembly and a washing machine, wherein the spray arm assembly includes: a support; a fixed gear fixed to the outer periphery of the support; a spray arm rotatably mounted on the support, having a cavity, a liquid inlet channel, and a first nozzle; a first rotating nozzle rotatably mounted on the spray arm, having a second nozzle, the second nozzle extending out of the spray arm, and the second nozzle being connected to the cavity; the axis of the second nozzle being at an angle to the axis of rotation of the first rotating nozzle; a connecting rod rotatably mounted on the spray arm, connected to the first rotating nozzle, and driving the first rotating nozzle to rotate when rotating; a first transmission gear connected to the connecting rod, the first transmission gear meshing with the fixed gear, and when the spray arm rotates, the first transmission gear rotates along the fixed gear, and the first transmission gear drives the connecting rod and the first rotating nozzle to rotate. The spray arm assembly of the present application not only realizes the normal rotation of the spray arm, but also realizes the 360° rotation of the rotating nozzle, avoiding or reducing the blind spot of washing, thereby facilitating the improvement of the cleanliness of washing.

Description

Technical Field

[0001] The present invention relates to the field of flushing machines, in particular to a spray arm assembly and a flushing machine. Background Art

[0002] The spray arm is an important component of the rinser. When the rinser is working, the nozzle of the spray arm can spray high-pressure water to wash away pollutants on the surface of tableware, fruits and vegetables. Usually, the spray range of the spray arm has a great influence on the cleanliness of the rinse. Therefore, how to optimize the structure of the spray arm to improve the cleanliness is a technical issue that needs to be considered. Summary of the Invention

[0003] In view of the above problems, the present invention proposes a spray arm assembly and a flushing machine to improve the flushing cleanliness.

[0004] The technical solution adopted by the present invention is as follows:

[0005] A spray arm assembly, comprising:

[0006] Support;

[0007] a fixed gear, the fixed gear being fixed to the outer periphery of the support;

[0008] a spray arm rotatably mounted on the support, the spray arm comprising a cavity and a liquid inlet channel connected to the cavity, and the spray arm further comprising a first nozzle connected to the cavity, wherein the spray arm is driven to rotate relative to the support when cleaning liquid is sprayed from the first nozzle;

[0009] a first rotating nozzle, the first rotating nozzle being rotatably disposed on the spray arm, the first rotating nozzle having a second nozzle extending out of the spray arm and communicating with the cavity; an axis of the second nozzle forming an angle with a rotation axis of the first rotating nozzle;

[0010] a connecting rod, the connecting rod being rotatably mounted on the spray arm, one end of the connecting rod being directly or indirectly connected to the first rotating nozzle, and driving the first rotating nozzle to rotate when the connecting rod rotates;

[0011] The first transmission gear is connected to the connecting rod and meshes with the fixed gear. When the spray arm rotates, the first transmission gear rotates along the fixed gear, and the first transmission gear drives the connecting rod and the first rotating nozzle to rotate.

[0012] The spray arm assembly of the present application operates in one manner: pressurized cleaning fluid enters the cavity through the liquid inlet channel, with a portion of the cleaning fluid being ejected through the first nozzle. Under the reaction force of the cleaning fluid ejected from the first nozzle, the spray arm rotates about the support, and the first transmission gear, which rotates with the spray arm, meshes and rotates about the fixed gear. This allows the first rotating nozzle, connected to the connecting rod, to rotate 360° along with the spray arm and 360° about its own axis.

[0013] The spray arm assembly of the present application not only realizes the normal rotation of the spray arm, but also realizes the 360° rotation of the first rotating nozzle and the spray arm together and the 360° rotation of the spray arm, thereby avoiding or reducing the blind spot of washing.

[0014] In actual use, the support can be fixed to the entire base of the washing machine.

[0015] The cleaning liquid mentioned in this application can be water or a mixture of water and detergent.

[0016] In this application, "X" being fixed to "Y" includes X and Y being fixed together by various means (such as welding, bonding, riveting, fastener connection, etc.), and also includes the case where X and Y are an integral structure, for example, the fixed gear and the support can be an integral structure, and the connecting rod and the first transmission gear can be an integral structure.

[0017] Optionally, the support has a middle hole, the spray arm has a hollow liquid inlet part, the hollow part of the liquid inlet part forms at least part of the liquid inlet channel, the inner sleeve or outer sleeve of the liquid inlet part is on the support, the liquid inlet channel is connected to the middle hole, and the rotation axis of the liquid inlet part coincides with the rotation axis of the spray arm.

[0018] Optionally, the spray arm assembly further includes an adapter, which is disposed in the cavity of the spray arm and connected to the first rotating nozzle, and the adapter is connected to the connecting rod, and the adapter, the first rotating nozzle, the connecting rod and the first transmission gear can rotate synchronously.

[0019] Optionally, the spray arm has a first hole on one side close to the first rotating nozzle, the first rotating nozzle has a first hook, and the adapter has a first slot, and the first hook passes through the first hole and cooperates with the first slot; the first rotating nozzle has a first limiting step, and there is an axial gap between the first limiting step and the outer wall of the spray arm; the adapter also includes an abutment column, which is protruding and abuts against the first rotating nozzle.

[0020] An axial gap is provided between the first limiting step and the outer wall of the spray arm, thereby preventing friction between the first rotating nozzle and the outer wall of the spray arm. The first engaging groove and the first hook cooperate to enable the adapter and the first rotating nozzle to rotate synchronously. The first hook and the first limiting step effectively define the position of the first rotating nozzle, thereby preventing the first rotating nozzle from axially separating from the adapter.

[0021] Optionally, the outer side wall of the adapter has transmission teeth;

[0022] The spray arm assembly further includes at least one second rotating nozzle and at least one second transmission gear, the number of the second rotating nozzles being equal to the number of the second transmission gears; the second rotating nozzle being rotatably disposed on the spray arm, the second rotating nozzle having a third nozzle extending out of the spray arm and communicating with the cavity, the axis of the third nozzle being at an angle to the rotation axis of the second rotating nozzle;

[0023] The second transmission gear is rotatably mounted in the cavity of the spray arm and is connected to the second rotating nozzle, and the second transmission gear and the second rotating nozzle can rotate synchronously;

[0024] The transmission teeth of the adapter are meshed with the second transmission gear.

[0025] Optionally, when there are multiple second rotating nozzles and multiple second transmission gears, the second rotating nozzles and the second transmission gears are distributed along the length direction of the spray arm, and the multiple second transmission gears are meshed with each other in sequence.

[0026] Optionally, the spray arm has a second hole on one side close to the second rotating nozzle, the second rotating nozzle has a second hook, the second transmission gear has a second slot, and the second hook passes through the second hole and engages with the second slot; the second rotating nozzle has a second limiting step, and there is an axial gap between the second limiting step and the outer wall of the spray arm.

[0027] Optionally, the cavity of the spray arm has a plurality of support ribs, the support ribs are raised, the second transmission gear includes a seat body portion and a gear portion, the seat body portion is connected to the gear portion, the support ribs are distributed at intervals along the circumference of the seat body portion, the seat body portion is located in the area surrounded by the support ribs, the outer peripheral surface of the seat body portion is gap-fitted with the wall surface of the support rib opposite to the outer peripheral surface of the seat body portion; the second transmission gear can rotate around the support rib.

[0028] Optionally, the angle between the axis of the second nozzle and the rotation axis of the first rotating nozzle is in the range of 30° to 70°.

[0029] Optionally, the angle between the axis of the third nozzle and the rotation axis of the second rotating nozzle is in the range of 30° to 70°.

[0030] Optionally, the adapter has a third slot, the connecting rod has a block, the spray arm has a through hole on the side close to the first transmission gear, the block passes through the through hole and is embedded in the third slot, and when the connecting rod rotates, the adapter is driven to rotate synchronously.

[0031] Optionally, the spray arm has a through hole, one end of the connecting rod is inserted into the through hole, the portion of the connecting rod located inside the spray arm has a third hook that cooperates with the through hole, the third hook passes through the through hole, and an axial gap is formed between the third hook and the inner wall of the cavity;

[0032] The portion of the connecting rod located on the outer side wall of the spray arm has a first abutting portion, and an axial gap is formed between the first abutting portion and the outer side wall of the spray arm.

[0033] Optionally, the outer side wall of the support has a flange, and the spray arm has an elastic hook that cooperates with the flange.

[0034] The present application also discloses a flushing machine, comprising the spray arm assembly described above.

[0035] The beneficial effect of the present invention is that the spray arm assembly of the present application not only realizes the normal rotation of the spray arm, but also realizes 360° rotation of the rotating nozzle, avoiding or reducing the washing blind area, thereby facilitating improved flushing cleanliness. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is a cross-sectional view of the spray arm assembly;

[0037] Figure 2 It is the AA section view of the spray arm assembly;

[0038] Figure 3 This is the BB cross-sectional view of the spray arm assembly;

[0039] Figure 4 yes Figure 3 The enlarged view of point Ⅰ in the middle;

[0040] Figure 5 yes Figure 1 Enlarged view of the middle II;

[0041] Figure 6 yes Figure 1 Enlarged view of point III in the middle;

[0042] Figure 7 yes Figure 2 Enlarged view of position IV in the middle;

[0043] Figure 8 yes Figure 1 Enlarged view of point V in the middle;

[0044] Figure 9 is a schematic diagram of the adapter.

[0045] The reference numerals in the figures are:

[0046] 1. Support; 11. Middle hole; 12. Flange; 2. Fixed gear; 3. Spray arm; 31. Liquid inlet; 311. Liquid inlet channel; 32. Cavity; 33. First nozzle; 34. Support rib; 35. Through hole; 36. First hole; 37. Second hole; 38. Elastic hook; 4. Connecting rod; 41. Block; 42. Third hook; 43. First abutting part; 5. First transmission gear; 6. Second transmission gear; 61. Second slot; 63. Raised rib; 64. Seat; 65. Gear part; 7. First rotating nozzle; 71. First hook; 72. Second nozzle; 73. First limiting step; 8. Second rotating nozzle; 81. Second hook; 82. Third nozzle; 83. Second limiting step; 9. Adapter; 91. Transmission tooth; 92. First slot; 93. Third slot; 94. Abutting column. DETAILED DESCRIPTION

[0047] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all of the embodiments. Generally, the components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0048] In the description of this application, it should be noted that the terms "inner" and "outer" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or the orientations or positional relationships in which the product of this application is typically placed when in use. These terms are intended solely to facilitate the description of this application and simplify the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" and the like are used solely for distinction and should not be construed as indicating or implying relative importance.

[0049] It should also be noted that, in the description of this application, unless otherwise expressly specified or limited, the terms "disposed" and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0050] The present invention will be described in detail below with reference to the accompanying drawings.

[0051] Example 1

[0052] like Figures 1 to 8 As shown, a spray arm assembly includes:

[0053] Support 1;

[0054] A fixed gear 2, the fixed gear 2 is fixed to the outer periphery of the support 1;

[0055] The spray arm 3 is rotatably arranged on the support 1. The spray arm 3 has a cavity 32 and a liquid inlet channel 311 connected to the cavity 32. The spray arm 3 also has a first nozzle 33 connected to the cavity 32. When the cleaning liquid is sprayed from the first nozzle 33, it can drive the spray arm 3 to rotate relative to the support 1; it can be imagined that the axis of the first nozzle 33 is set at an angle to the rotation axis of the spray arm 3.

[0056] a first rotating nozzle 7, which is rotatably mounted on the spray arm 3 and has a second nozzle 72 extending from the spray arm 3 and communicating with the cavity 32; an axis of the second nozzle 72 forms an angle with the rotation axis of the first rotating nozzle 7;

[0057] The connecting rod 4 is rotatably mounted on the spray arm 3. One end of the connecting rod 4 is indirectly connected to the first rotating nozzle 7. When the connecting rod 4 rotates, the first rotating nozzle 7 is driven to rotate.

[0058] The first transmission gear 5 is fixed to the connecting rod 4 and meshes with the fixed gear 2. When the spray arm 3 rotates, the first transmission gear 5 rotates accordingly, achieving meshing with the fixed gear 2. Since the fixed gear 2 cannot rotate, the first transmission gear 5 rotates on its own, thereby driving the connecting rod 4 and the first rotating nozzle 7 to rotate synchronously. In this way, the rotation of the spray arm 3 and the rotation of the first rotating nozzle 7 are achieved, thereby expanding the flushing range and reducing the flushing blind area.

[0059] The spray arm assembly of the present application operates as follows: pressurized cleaning liquid enters the cavity 32 through the liquid inlet channel 311, and a portion of the cleaning liquid is ejected through the first nozzle 33. Under the reaction force of the cleaning liquid ejected from the first nozzle 33, the spray arm 3 rotates about the support 1, and the first transmission gear 5, which rotates with the spray arm 3, meshes and rotates around the fixed gear 2. In this way, the first rotating nozzle 7 connected to the connecting rod 4 can achieve both 360-degree rotation with the spray arm 3 and 360-degree rotation around its own axis.

[0060] The spray arm assembly of the present application not only realizes the normal rotation of the spray arm 3, but also realizes the 360° rotation of the first rotating nozzle and the spray arm 3 together and the 360° rotation of the self-rotation, thereby avoiding or reducing the blind spot of washing.

[0061] In actual use, the support 1 can be fixed to the entire base of the washing machine.

[0062] The cleaning liquid mentioned in this application can be water or a mixture of water and detergent.

[0063] The phrase "X" being fixed to "Y" in this application includes X and Y being fixed together by various means (such as welding, bonding, riveting, fastener connection, etc.), and also includes the case where X and Y are an integral structure, for example, the fixed gear 2 and the support 1 can be an integral structure, and the connecting rod 4 and the first transmission gear 5 can be an integral structure.

[0064] like Figure 1 As shown, in this embodiment, the support 1 has a central hole 11, and the spray arm 3 has a hollow liquid inlet portion 31. The hollow portion of the liquid inlet portion 31 forms at least a portion of a liquid inlet channel 311. When the hollow portion of the liquid inlet portion 31 forms a portion of the liquid inlet channel 311, the spray arm 3 may also have other pipes connected to the liquid inlet portion 31. The liquid inlet portion 31 is internally or externally sleeved on the support 1, and the liquid inlet channel 311 is connected to the central hole 11. The rotation axis of the liquid inlet portion 31 coincides with the rotation axis of the spray arm 3.

[0065] like Figure 1 、 4 As shown in Figures 5 and 5 , in this embodiment, the spray arm assembly further includes an adapter 9, which is rotatably mounted in the cavity 32 of the spray arm 3 and connected to the first rotating nozzle 7. The adapter 9 and the first rotating nozzle 7 can rotate synchronously.

[0066] In this embodiment, a first hole 36 is provided on the side of the spray arm 3 close to the first rotating nozzle 7, the first rotating nozzle 7 has three first hooks 71, the adapter 9 has a first slot 92, and the first hook 71 passes through the first hole 36 and cooperates with the first slot 92; the first rotating nozzle 7 has a first limiting step 73, and there is an axial gap between the first limiting step 73 and the outer wall of the spray arm 3, which is conducive to preventing friction between the first rotating nozzle 7 and the outer wall of the spray arm 3; of course, as other embodiments, the first limiting step 73 can also abut against the outer wall of the spray arm 3.

[0067] The cooperation between the first slot 92 and the first hook 71 enables the adapter 9 and the first rotating nozzle 7 to rotate synchronously; the first hook 71 and the first limiting step 73 can effectively limit the position of the first rotating nozzle 7, thereby preventing the first rotating nozzle 7 from axially disengaging from the adapter 9.

[0068] like Figure 6 and 9 As shown, in this embodiment, the adapter 9 has a third slot 93, and the connecting rod 4 has a block 41, which is embedded in the third slot 93. When the connecting rod 4 rotates, the adapter 9 is driven to rotate synchronously.

[0069] like Figure 6 As shown, in this embodiment, the spray arm 3 has a through hole 35, one end of the connecting rod 4 is inserted into the through hole 35, and the block of the connecting rod 4 has a third hook 42 that cooperates with the through hole 35. There is an axial gap between the third hook 42 and the side of the cavity 32 close to the first transmission gear 5, that is, the third hook 42 passes through the through hole 35 and has an axial gap with the inner wall of the cavity 32, which helps to prevent the third hook 42 from contacting the inner wall of the cavity 32, and further helps to prevent friction between the connecting rod 4 and the inner wall of the cavity 32 during rotation; the part of the connecting rod 4 located on the outside of the spray arm 3 has a first abutment portion 43, and there is an axial gap between the first abutment portion 43 and the outer wall of the spray arm 3, which helps to prevent the first abutment portion 43 from contacting the outside of the spray arm 3, thereby helping to avoid friction between the connecting rod 4 and the spray arm 3 during rotation. As shown Figure 5 and 9 As shown, in this embodiment, the adapter 9 also includes an abutment column 94, which is raised and abuts against the first rotating nozzle 7. In this way, the abutment column 94 and the first rotating nozzle 7 are abutted to achieve one side limitation of the first rotating nozzle 7 in the height direction, which is beneficial to prevent the first rotating nozzle 7 from contacting the outer wall of the spray arm 3, and further helps to prevent friction between the first rotating nozzle 7 and the outer wall of the spray arm 3, thereby causing wear to at least one of the first rotating nozzle 7 and the spray arm 3.

[0070] like Figure 1 、 4 As shown in FIG5 , in this embodiment, the outer wall of the adapter 9 has a transmission tooth 91 ;

[0071] The spray arm assembly further includes at least one second rotating nozzle 8 and at least one second transmission gear 6. The second rotating nozzle 8 is rotatably mounted on the spray arm 3 and communicates with the cavity 32. The second rotating nozzle 8 has a third nozzle 82 extending out of the spray arm 3. The axis of the third nozzle 82 forms an angle with the rotation axis of the second rotating nozzle 8.

[0072] The second transmission gear 6 is rotatably mounted in the cavity 32 of the spray arm 3 and is connected to the second rotating nozzle 8. The second transmission gear 6 and the second rotating nozzle 8 can rotate synchronously.

[0073] The transmission teeth 91 mesh with the second transmission gear 6 .

[0074] The adapter 9 is engaged with the second transmission gear 6 through the transmission teeth 91, and the spray arm assembly can realize the simultaneous rotation of the first rotating nozzle 7 and the second rotating nozzle 8, thereby achieving a better spraying effect.

[0075] like Figure 1 As shown, in this embodiment, when there are multiple second rotating nozzles 8 and multiple second transmission gears 6, the multiple second transmission gears 6 are meshed and matched in sequence.

[0076] like Figure 5 As shown, in this embodiment, a second hole 37 is provided on the side of the spray arm 3 close to the second rotating nozzle 8, the second rotating nozzle 8 has a second hook 81, and the second transmission gear 6 has a second slot 61. The second hook 81 passes through the second hole 37 and cooperates with the second slot 61; the second rotating nozzle 8 has a second limiting step 83, and there is an axial gap between the second limiting step 83 and the outer wall of the spray arm 3; this is conducive to preventing friction between the second rotating nozzle 8 and the outer wall of the spray arm 3; of course, as other embodiments, the second limiting step 83 can also abut against the outer wall of the spray arm 3.

[0077] The cooperation between the second slot 61 and the second hook 81 can make the second transmission gear 6 and the second rotating nozzle 8 rotate synchronously; the second hook 81 and the second limiting step 83 can effectively limit the position of the second rotating nozzle 8, thereby preventing the second rotating nozzle 8 from axially disengaging from the second transmission gear 6.

[0078] like Figure 4 As shown, in this embodiment, a plurality of support ribs 34 are provided in the cavity 32 of the spray arm 3, and the support ribs 34 are arranged in a raised manner. The second transmission gear 6 includes a seat body portion 64 and a gear portion 65. The radial profile size of the seat body portion 64 is smaller than the radial profile size of the gear portion 65. The support ribs 34 are distributed at intervals along the circumference of the seat body portion 64. The seat body portion 64 is located in the area surrounded by the support ribs 34, and the outer peripheral surface of the seat body portion 64 is gap-matched with the wall surface of the support rib 34 opposite to the outer peripheral surface of the seat body portion 64, which is conducive to limiting the radial position of the second transmission gear 6; the second transmission gear 6 can rotate around the support rib 34.

[0079] like Figure 5 As shown, in this embodiment, the upper end surfaces of the adapter 9 and the second transmission gear 6 each have a raised rib 63. In practice, there is a gap between the raised rib 63 and the spray arm 3. However, due to manufacturing errors, the adapter 9 and the second transmission gear 6 may contact the spray arm 3. The provision of the raised rib 63 reduces the contact area between the adapter 9 and the second transmission gear 6 and the spray arm 3, thereby helping to reduce friction between them.

[0080] In order to ensure that the first rotating nozzle 7 and the second rotating nozzle 8 achieve a certain range of flushing areas, in this embodiment, the angle range between the axis of the second nozzle 72 and the rotation axis of the first rotating nozzle 7 is: 30°~70°; further, the angle range between the axis of the third nozzle 82 and the rotation axis of the second rotating nozzle 8 is: 30°~70°.

[0081] like Figure 1 As shown, in this embodiment, the outer wall of the support 1 has a flange 12, and the spray arm 3 has an elastic hook 38 that cooperates with the flange 12. The cooperation between the flange 12 and the elastic hook 38 can prevent the spray arm 3 from detaching from the support 1 upward.

[0082] This embodiment also discloses a washing machine, including the spray arm assembly of this embodiment. When the spray arm assembly of this application is used in a washing machine, it can effectively improve the washing quality of the washing machine and enhance the user's user experience satisfaction.

[0083] Example 2

[0084] This embodiment differs from the first embodiment in that one end of the connecting rod 4 is no longer indirectly connected to the first rotating nozzle 7 via the adapter 9, but is directly connected to the first rotating nozzle 7. Rotation of the connecting rod 4 drives the first rotating nozzle 7 to rotate. To achieve synchronous rotation of the connecting rod 4 and the first rotating nozzle 7, various existing connection methods may be employed, including but not limited to snap-fitting, bonding, welding, and fastener connections.

[0085] Example 3

[0086] The difference between this embodiment and embodiment 1 is that the spray arm assembly only has the first rotating nozzle 7 , and the second rotating nozzle 8 and the second transmission gear 6 are not provided.

[0087] Example 4

[0088] The difference between this embodiment and embodiment 1 is that the second transmission gear 6 is arranged outside the spray arm 3 like the first transmission gear 5. At this time, the second rotating nozzle 8 can be directly or indirectly connected to the second transmission gear 6, as long as the second rotating nozzle 8 can rotate synchronously with the second transmission gear 6.

[0089] Example 5

[0090] The difference between this embodiment and embodiment 1 is that the number of teeth and radius of the adapter 9 and the second transmission gear 6 can be set according to needs, and the initial direction and inclination angle of the second nozzle 72 of the first rotating nozzle 7 and the third nozzle 82 of the second rotating nozzle 8 can also be set according to needs.

[0091] The above description is only a preferred embodiment of the present invention and does not limit the scope of patent protection of the present invention. Any equivalent structural transformation made by using the contents of the description and drawings of the present invention, directly or indirectly applied to other related technical fields, is also included in the scope of protection of the present invention.

Claims

1. A spray arm assembly, characterized in that: include: Support; a fixed gear, the fixed gear being fixed to the outer periphery of the support; a spray arm rotatably mounted on the support, the spray arm comprising a cavity and a liquid inlet channel connected to the cavity, and the spray arm further comprising a first nozzle connected to the cavity, wherein the spray arm is driven to rotate relative to the support when cleaning liquid is sprayed from the first nozzle; a first rotating nozzle, the first rotating nozzle being rotatably disposed on the spray arm, the first rotating nozzle having a second nozzle extending out of the spray arm and communicating with the cavity; an axis of the second nozzle forming an angle with a rotation axis of the first rotating nozzle; a connecting rod, the connecting rod being rotatably mounted on the spray arm, one end of the connecting rod being directly or indirectly connected to the first rotating nozzle, and driving the first rotating nozzle to rotate when the connecting rod rotates; The first transmission gear is connected to the connecting rod and meshes with the fixed gear. When the spray arm rotates, the first transmission gear rotates along the fixed gear, and the first transmission gear drives the connecting rod and the first rotating nozzle to rotate.

2. The spray arm assembly according to claim 1, wherein: The support has a middle hole, and the spray arm has a hollow liquid inlet portion. The hollow portion of the liquid inlet portion forms at least part of the liquid inlet channel. The inner sleeve or outer sleeve of the liquid inlet portion is on the support, and the liquid inlet channel is connected to the middle hole. The rotation axis of the liquid inlet portion coincides with the rotation axis of the spray arm.

3. The spray arm assembly according to claim 2, wherein: The spray arm assembly also includes an adapter, which is arranged in the cavity of the spray arm and connected to the first rotating nozzle. The adapter is connected to the connecting rod. The adapter, the first rotating nozzle, the connecting rod and the first transmission gear can rotate synchronously.

4. The spray arm assembly according to claim 3, wherein: The spray arm has a first hole on one side close to the first rotating nozzle, the first rotating nozzle has a first hook, and the adapter has a first slot, the first hook passes through the first hole and cooperates with the first slot; the first rotating nozzle has a first limiting step, and there is an axial gap between the first limiting step and the outer wall of the spray arm; the adapter also includes an abutment column, which is protruding and abuts against the first rotating nozzle.

5. The spray arm assembly according to claim 3, wherein: The outer side wall of the adapter is provided with transmission teeth; The spray arm assembly further includes at least one second rotating nozzle and at least one second transmission gear, the number of the second rotating nozzles being equal to the number of the second transmission gears; the second rotating nozzle being rotatably disposed on the spray arm, the second rotating nozzle having a third nozzle extending out of the spray arm and communicating with the cavity, the axis of the third nozzle being at an angle to the rotation axis of the second rotating nozzle; The second transmission gear is rotatably mounted in the cavity of the spray arm and is connected to the second rotating nozzle, and the second transmission gear and the second rotating nozzle can rotate synchronously; The transmission teeth of the adapter are meshed with the second transmission gear.

6. The spray arm assembly according to claim 5, wherein: When there are multiple second rotating nozzles and multiple second transmission gears, the second rotating nozzles and the second transmission gears are distributed along the length direction of the spray arm, and the multiple second transmission gears are meshed with each other in sequence.

7. The spray arm assembly according to claim 5, wherein: The spray arm has a second hole on one side close to the second rotating nozzle, the second rotating nozzle has a second hook, the second transmission gear has a second slot, the second hook passes through the second hole and engages with the second slot; the second rotating nozzle has a second limiting step, and there is an axial gap between the second limiting step and the outer wall of the spray arm.

8. The spray arm assembly according to claim 5, wherein: There are multiple supporting ribs in the cavity of the spray arm, and the supporting ribs are raised. The second transmission gear includes a seat body and a gear part. The seat body is connected to the gear part. The supporting ribs are distributed at intervals along the circumference of the seat body. The seat body is located in the area surrounded by the supporting ribs. The outer peripheral surface of the seat body is gap-fitted with the wall surface of the supporting rib opposite to the outer peripheral surface of the seat body; the second transmission gear can rotate around the supporting rib.

9. The spray arm assembly according to any one of claims 1 to 8, wherein: The angle between the axis of the second nozzle and the rotation axis of the first rotating nozzle is in the range of 30° to 70°.

10. The spray arm assembly according to claim 5, wherein: The angle between the axis of the third nozzle and the rotation axis of the second rotating nozzle is in the range of 30° to 70°.

11. The spray arm assembly according to claim 4, wherein: The adapter has a third slot, the connecting rod has a block, the spray arm has a through hole on the side close to the first transmission gear, the block passes through the through hole and is embedded in the third slot, and when the connecting rod rotates, the adapter is driven to rotate synchronously.

12. The spray arm assembly of claim 11, wherein: The spray arm has a through hole, one end of the connecting rod is inserted into the through hole, the portion of the connecting rod located inside the spray arm has a third hook that cooperates with the through hole, the third hook passes through the through hole, and an axial gap is formed between the third hook and the inner wall of the cavity; The portion of the connecting rod located on the outer side wall of the spray arm has a first abutting portion, and an axial gap is formed between the first abutting portion and the outer side wall of the spray arm.

13. The spray arm assembly of claim 1, 2, 3, 4, 5, 6, 7, 8, 10 or 12, wherein: The outer side wall of the support is provided with a flange, and the spray arm is provided with an elastic hook matched with the flange.

14. A washing machine, characterized in that: The spray arm assembly comprises the spray arm assembly according to any one of claims 1 to 13.

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