Spray arm assembly and dishwasher

Abstract

The present invention discloses a spray arm assembly and a dishwasher. The spray arm assembly includes: a spray arm seat; a mounting shaft, the mounting shaft being rotatably mounted on the spray arm seat; a main spray arm, the main spray arm being rotatably mounted on the mounting shaft, the main spray arm being transmission-connected to the spray arm seat and the mounting shaft; and a secondary spray arm, the secondary spray arm being rotatably mounted on the main spray arm, the secondary spray arm being transmission-connected to the mounting shaft so as to rotate forward and reverse around its own axis when the secondary spray arm rotates along with the main spray arm. Thus, through the coordination of the spray arm seat, the mounting shaft, the main spray arm, and the secondary spray arm, the secondary spray arm can rotate forward and reverse around its own axis when rotating along with the main spray arm, thereby providing water jets at different angles, flushing items to be washed from different angles, reducing dead angles in washing, and improving the cleaning effect.

Description

Technical Field

[0001] The present invention relates to the field of household electrical appliances, in particular to a spray arm assembly and a dishwasher having the same. Background Art

[0002] With the improvement of living standards, home appliances that free hands are becoming a standard feature of quality living. Compared to traditional hand washing, dishwashers offer advantages such as cleanliness, sterilization, and water and labor savings. Household dishwashers generally use a spray-type washing method. Driven by a wash pump, water flows through rotating spray arms, flushing the surface of dishes. The cleaning effect is closely related to the design of the spray arms.

[0003] In the related art, washing appliances are generally provided with a spray arm assembly. When the washing appliance is working, water flows through the rotating spray arm to spray and flush the surface of the object to be washed. However, due to the limited angle of the spray water flow provided by the spray arm assembly, it is difficult to effectively clean the objects to be washed in the dead corners of washing. Therefore, how to improve the washing effect of the washing appliance is a technical problem that technicians in this field have always been eager to solve. Summary of the Invention

[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a spray arm assembly that can provide spray water streams at different angles, thereby flushing the laundry from different angles, reducing dead angles in washing, and improving the cleaning effect.

[0005] The present invention further provides a dishwasher.

[0006] The spray arm assembly according to an embodiment of the present invention includes: a spray arm seat; a mounting shaft, which is rotatably provided on the spray arm seat; a main spray arm, which is rotatably provided on the mounting shaft, and is transmission-connected to the spray arm seat and the mounting shaft; an auxiliary spray arm, which is rotatably provided on the main spray arm, and is transmission-connected to the mounting shaft so as to rotate forward and reverse around its own axis when the auxiliary spray arm rotates together with the main spray arm.

[0007] According to the spray arm assembly of the embodiment of the present invention, the spray arm seat, the mounting shaft, the main spray arm and the auxiliary spray arm are coordinated. The auxiliary spray arm can rotate forward and reverse around its own axis together with the main spray arm, and can provide spray water flow at different angles. It can flush the objects to be washed from different angles, reduce dead corners in washing, and improve the cleaning effect.

[0008] In some examples of the present invention, the rotation axis of the mounting shaft coincides with the rotation axis of the main spray arm.

[0009] In some examples of the present invention, the rotation axis of the main spray arm is perpendicular to the axis of the auxiliary spray arm.

[0010] In some examples of the present invention, the mounting shaft has a first mating portion and a second mating portion, and the auxiliary spray arm has a driven transmission member, which alternately engages with the first mating portion and the second mating portion, wherein, when the driven transmission member engages with the first mating portion, the auxiliary spray arm rotates around a first direction, and when the driven transmission member engages with the second mating portion, the auxiliary spray arm rotates around a second direction, and the first direction is opposite to the second direction.

[0011] In some examples of the present invention, the first matching portion and the second matching portion are spaced apart in the axial direction of the installation shaft.

[0012] In some examples of the present invention, the first mating portion and the second mating portion respectively include a plurality of first mating portions, the plurality of first mating portions are arranged at intervals in the circumferential direction of a first imaginary circle, and the plurality of second mating portions are arranged at intervals in the circumferential direction of a second imaginary circle, wherein a center line of the first imaginary circle coincides with a center line of the second imaginary circle, and the first imaginary circle and the second imaginary circle are arranged at intervals in the axial direction of the mounting shaft.

[0013] In some examples of the present invention, projections of the plurality of first matching portions on the plane where the second imaginary circle is located and the plurality of second matching portions are alternately arranged in the circumferential direction of the imaginary circle.

[0014] In some examples of the present invention, the mounting shaft includes: a first shaft body, the first shaft body is passed through the main spray arm; a first mating piece, the first mating piece is arranged at one end of the first shaft body, and the first mating portion is formed on the first mating piece; a second mating piece, the second mating piece is arranged at the other end of the first shaft body, and the second mating portion is formed on the second mating piece.

[0015] In some examples of the present invention, the driven transmission member is a driven bevel gear, and the first mating member and the second mating member are mating bevel gears, wherein the first mating member further has a first avoidance portion, and the second mating member further has a second avoidance portion. When the driven bevel gear is engaged with the first mating member, the driven bevel gear is mated with the first mating portion and avoids the second avoidance portion. When the driven bevel gear is engaged with the second mating member, the driven bevel gear is mated with the second mating portion and avoids the first avoidance portion.

[0016] In some examples of the present invention, one of the first fitting member and the second fitting member is integrally formed with the first shaft body, and the other of the first fitting member and the second fitting member is detachably connected to the first shaft body.

[0017] In some examples of the present invention, the other of the first mating member and the second mating member has a first latching protrusion, the first shaft body has a first latching groove, and the first latching protrusion is engaged with the first latching groove.

[0018] In some examples of the present invention, the spray arm assembly further includes: a fixing member, which is arranged on one side of the other of the first mating member and the second mating member, the fixing member has a second latching protrusion, the first shaft body has a second latching groove, and the second latching protrusion is engaged with the second latching groove.

[0019] In some examples of the present invention, the mounting shaft further includes: a second shaft body, wherein the second shaft body is detachably connected to the first shaft body.

[0020] In some examples of the present invention, the first shaft body is sleeved on the outside of the second shaft body, the outer peripheral wall of the second shaft body has a limiting protrusion, and the inner peripheral wall of the first shaft body has a limiting groove, and the limiting protrusion is screwed together with the limiting groove.

[0021] In some examples of the present invention, the mounting shaft has a third mating portion, the spray arm seat has a fourth mating portion, and the main spray arm has an active transmission member, which simultaneously engages with the third mating portion and the fourth mating portion.

[0022] In some examples of the present invention, the mounting shaft includes a third mating piece, the third mating portion is formed on the third mating piece, and the spray arm seat includes: a seat body, the mounting shaft is rotatably provided on the seat body; a fourth mating piece, the fourth mating piece is provided on the seat body, the fourth mating portion is formed on the fourth mating piece, and the fourth mating piece is coaxially arranged with the third mating piece.

[0023] In some examples of the present invention, the fourth mating piece is sleeved on the outside of the seat body, the fourth mating piece has an elastic buckle, the outer peripheral wall of the seat body has a mating protrusion, and the elastic buckle and the mating protrusion are staggered.

[0024] In some examples of the present invention, the active transmission member is an active cylindrical gear, and the third matching member and the fourth matching member are matching cylindrical gears.

[0025] In some examples of the present invention, the number of teeth of the third matching member is not equal to the number of teeth of the fourth matching member.

[0026] In some examples of the present invention, the main spray arm includes: a spray arm body, the spray arm body having a mounting hole, the mounting shaft passing through the mounting hole; a connecting shaft, the connecting shaft is provided on the spray arm body and the connecting shaft is spaced apart from the mounting hole, and the active transmission member is rotatably provided on the connecting shaft.

[0027] In some examples of the present invention, the main spray arm has a main channel and a plurality of main spray holes, the main channel is connected to the main spray holes, and the mounting shaft has a water inlet channel, the water inlet channel is connected to the main channel.

[0028] In some examples of the present invention, the main spray arm is adapted to rotate around the axis of the mounting shaft under the drive of the water flow sprayed from the main spray hole.

[0029] In some examples of the present invention, the auxiliary spray arm has an auxiliary flow channel and a plurality of auxiliary spray holes, and the auxiliary flow channel is communicated with the auxiliary spray holes and the water inlet flow channel.

[0030] The dishwasher according to the present invention comprises the above-mentioned spray arm assembly.

[0031] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the following description of the embodiments with reference to the accompanying drawings, in which:

[0033] Figure 1 is an exploded view of a spray arm assembly according to an embodiment of the present invention;

[0034] Figure 2 yes Figure 1 A magnified view of point A;

[0035] Figure 3 is a schematic diagram of the assembly of a spray arm assembly according to an embodiment of the present invention;

[0036] Figure 4 yes Figure 3 Enlarged view of point B;

[0037] Figure 5 is a schematic assembly diagram of a spray arm assembly from another angle according to an embodiment of the present invention;

[0038] Figure 6 yes Figure 5 Enlarged view of point C;

[0039] Figure 7 is a cross-sectional view of a spray arm assembly according to an embodiment of the present invention;

[0040] Figure 8 yes Figure 7 Enlarged view of point D;

[0041] Figure 9 is a schematic diagram of a fourth matching component of a spray arm assembly according to an embodiment of the present invention;

[0042] Figure 10 is a schematic diagram of a first shaft body of a spray arm assembly according to an embodiment of the present invention;

[0043] Figure 11 is a schematic diagram of the first shaft body of the spray arm assembly according to another angle of view of an embodiment of the present invention;

[0044] Figure 12 2 is a schematic diagram of a seat body of a spray arm assembly according to an embodiment of the present invention.

[0045] Reference numerals:

[0046] Spray arm assembly 100;

[0047] Spray arm seat 10; fourth matching portion 11; elastic buckle 112; first buckle portion 1121; second buckle portion 1122; seat body 12; matching protrusion 121; first protrusion 1211; second protrusion 1212; fourth matching member 13; water inlet 14;

[0048] Mounting shaft 20; first mating structure 21; first avoidance portion 211; second mating structure 22; second avoidance portion 221; first shaft body 23; first engaging groove 231; second engaging groove 232; limiting groove 233; first engaging protrusion 24; second shaft body 25; limiting protrusion 251; third mating portion 26; first mating member 27; second mating member 28; third mating member 29;

[0049] Main spray arm 30; active transmission member 31; spray arm body 32; mounting hole 321; connecting shaft 33; main spray hole 34; main flow channel 35; water inlet channel 36;

[0050] Auxiliary spray arm 40; driven transmission member 41; auxiliary spray hole 42; cleaning hole 421; driving hole 422; auxiliary flow channel 423;

[0051] Fixing member 50; second locking protrusion 51. DETAILED DESCRIPTION

[0052] The following describes embodiments of the present invention in detail. Examples of the embodiments 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 intended only to explain the present invention and are not to be construed as limiting the present invention.

[0053] Reference below Figures 1-12 The spray arm assembly 100 according to an embodiment of the present invention will be described. The spray arm assembly 100 may be used in a dishwasher, that is, the spray arm assembly 100 may be installed on the dishwasher.

[0054] like Figures 1-12 As shown, a spray arm assembly 100 according to an embodiment of the present invention may include: a spray arm base 10, a mounting shaft 20, a main spray arm 30, and a secondary spray arm 40. The mounting shaft 20 may be mounted on the spray arm base 10 and rotatable relative to the spray arm base 10. The main spray arm 30 may be mounted on the mounting shaft 20 and rotatable relative to the mounting shaft 20. The main spray arm 30 may be transmission-connected to the spray arm base 10 and the mounting shaft 20. The secondary spray arm 40 may be mounted on the main spray arm 30 and rotatable relative to the main spray arm 30. The secondary spray arm 40 may be transmission-connected to the mounting shaft 20, allowing the secondary spray arm 40 to rotate forward and reverse about its own axis while rotating with the main spray arm 30.

[0055] It should be noted that the lower end of the inner cavity of the mounting shaft 20 can be communicated with the inner cavity of the spray arm seat 10, and the upper end of the inner cavity of the mounting shaft 20 can be communicated with the inner cavity of the main spray arm 30. The upper and lower ends of the mounting shaft 20 are respectively Figure 1 The spray arm seat 10 can support the spray arm assembly 100 in the upper and lower directions of the middle mounting shaft 20. The mounting shaft 20 is mounted on the spray arm seat 10 and can rotate around the central axis of the mounting shaft 20 on the spray arm seat 10. Figure 1 As shown, the upper end of the mounting shaft 20 is suitable for passing through the main spray arm 30, and the main spray arm 30 is connected to the mounting shaft 20 in a transmission connection manner. The end of the main spray arm 30 opposite to the auxiliary spray arm 40 is connected to the auxiliary spray arm 40, and the inner cavity of the main spray arm 30 is communicated with the inner cavity of the auxiliary spray arm 40. The main spray arm 30 and the auxiliary spray arm 40 can be connected by a threaded connection. This arrangement can make the auxiliary spray arm 40 and the main spray arm 30 rotate synchronously around the central axis of the mounting shaft 20 as a whole. The auxiliary spray arm 40 can be transmission-connected to the mounting shaft 20. Through the incomplete meshing action of the gears on the mounting shaft 20, the auxiliary spray arm 40 rotates around the central axis of the mounting shaft 20 together with the main spray arm 30, while the auxiliary spray arm 40 rotates forward and reverse along its own axis (the spray arm 40 can rotate along its own central axis), thereby realizing the swinging motion of the spray arm assembly 100.

[0056] The spray arm seat 10 may have a water inlet 14, preferably, as shown in FIG. Figure 8As shown, a water inlet 14 can be provided at the lower end of the spray arm seat 10, and the water inlet 14 of the spray arm seat 10 can be connected to a water source. When the spray arm assembly 100 is working, water can flow into the spray arm seat 10 through the water inlet 14 of the spray arm seat 10. Since the inner cavities of the spray arm seat 10, the mounting shaft 20, the main spray arm 30 and the auxiliary spray arm 40 are all connected, the water can flow from the spray arm seat 10 to the mounting shaft 20 located on the spray arm seat 10, and be divided within the mounting shaft 20, with part of the water flowing into the main spray arm 30 and the other part of the water flowing into the auxiliary spray arm 40. Finally, the water is sprayed out through the main spray arm 30 and the auxiliary spray arm 40 to clean the laundry.

[0057] Furthermore, during the rotation of the main spray arm 30 around the central axis of the mounting shaft 20, the main spray arm 30 and the auxiliary spray arm 40 can rotate synchronously around the central axis of the mounting shaft 20. Through the incomplete meshing of the gears on the mounting shaft 20, the spray arm assembly 100 transmits the auxiliary spray arm 40 to alternately rotate forward and reverse around its own axis. That is, during the rotation of the auxiliary spray arm 40 around the central axis of the mounting shaft 20, it also swings around its own axis, so that the water flow can change at different angles with the swinging motion of the auxiliary spray arm 40, and thus can flush the objects to be washed from different angles, reduce dead corners in washing, and improve the cleaning effect.

[0058] Therefore, through the cooperation of the spray arm seat 10, the mounting shaft 20, the main spray arm 30 and the auxiliary spray arm 40, the auxiliary spray arm 40 can rotate forward and reverse around its own axis while rotating together with the main spray arm 30, and can provide spray water flow at different angles, and can flush the objects to be washed from different angles, reduce dead corners in washing, and improve the cleaning effect.

[0059] In some embodiments of the present invention, the rotation axis of the mounting shaft 20 (i.e., the central axis of the mounting shaft 20) can coincide with the rotation axis of the main spray arm 30. It should be noted that the rotation axis of the mounting shaft 20 and the rotation axis of the main spray arm 30 can be colinear. Preferably, the rotation axis of the main spray arm 30 is set to the central axis of the mounting shaft 20. This arrangement can reduce the radial dimension of the spray arm assembly 100, making the spray arm assembly 100 more compact.

[0060] In some embodiments of the present invention, the rotation axis of the main spray arm 30 can be perpendicular to the axis of the auxiliary spray arm 40. It should be noted that the axis of the auxiliary spray arm 40 is also perpendicular to the rotation axis of the mounting shaft 20. The auxiliary spray arm 40 can rotate forward and reverse around its own central axis while rotating along with the main spray arm 30. This arrangement improves the rotational stability of the main spray arm 30 and auxiliary spray arm 40 during the swinging motion of the spray arm assembly 100, thereby enhancing the stability of the spray arm assembly 100 during operation.

[0061] In some embodiments of the present invention, Figure 1-Figure 3As shown, the mounting shaft 20 may include a first mating structure 21 (i.e., the first mating portion 21) and a second mating structure 22 (i.e., the second mating portion 22), and the auxiliary spray arm 40 may include a driven transmission member 41, and the driven transmission member 41 may alternately cooperate with the first mating structure 21 and the second mating structure 22. Furthermore, when the driven transmission member 41 is in the state of cooperating with the first mating structure 21, the auxiliary spray arm 40 may rotate around the first direction, and when the driven transmission member 41 is in the state of cooperating with the second mating structure 22, the auxiliary spray arm 40 may rotate around the second direction. The first direction and the second direction are both circumferential directions of the auxiliary spray arm 40 itself, and the first direction and the second direction are two opposite directions.

[0062] It should be noted that in the process of the main spray arm 30 driving the mounting shaft 20 to rotate around the rotation axis of the mounting shaft 20, the main spray arm 30 and the auxiliary spray arm 40 rotate synchronously around the rotation axis of the mounting shaft 20. When the driven transmission member 41 cooperates with the first matching structure 21, the driven transmission member 41 is not matched with the second matching structure 22. Under the reaction force of the first matching structure 21, the mounting shaft 20 drives the auxiliary spray arm 40 to rotate synchronously around its own axis in the first direction through the transmission connection between the mounting shaft 20 and the auxiliary spray arm 40. The rotation around the first direction can be forward rotation. When the driven transmission member 41 cooperates with the second matching structure 22, the driven transmission member 41 is disengaged from the first matching structure 21. Under the reaction force of the second matching structure 22, the mounting shaft 20 drives the auxiliary spray arm 40 to rotate synchronously around its own central axis in the second direction through the transmission connection between the mounting shaft 20 and the auxiliary spray arm 40. The rotation around the second direction can be reverse rotation. Alternatively, in other embodiments of the present invention, the rotation around the first direction can be reverse rotation, and the rotation around the second direction can be forward rotation. This alternating and repetitive motion achieves the back-and-forth swinging motion of the auxiliary spray arm 40 about its own central axis. This arrangement allows the auxiliary spray arm 40 to provide water jets at different angles when water enters the spray arm assembly 100, thereby flushing the laundry from different angles, reducing blind spots in the washing process, and improving the cleaning effect.

[0063] In some embodiments of the present invention, Figures 1-6As shown, in the axial direction of the mounting shaft 20, the first mating structure 21 and the second mating structure 22 can be spaced apart and arranged. It should be explained that the first mating structure 21 can be set at one end of the axial direction of the mounting shaft 20, and the second mating structure 22 can be set at the other end of the axial direction of the mounting shaft 20. The axial direction of the mounting shaft 20 is the up-down direction in Figure 1. Preferably, the first mating structure 21 is set at the lower end of the mounting shaft 20, and the second mating structure 22 is set at the upper end of the mounting shaft 20. This arrangement can achieve alternating mating of the driven transmission member 41 with the first mating structure 21 and the second mating structure 22, thereby providing water jets at different angles, thereby flushing the items to be washed from different angles, reducing dead angles in washing, and improving the cleaning effect.

[0064] In some embodiments of the present invention, the first mating structure 21 and the second mating structure 22 may each include a plurality of first mating structures 21, and the plurality of second mating structures 22 may be spaced apart in the circumferential direction of the first imaginary circle, and the plurality of second mating structures 22 may be spaced apart in the circumferential direction of the second imaginary circle. The centerline of the second imaginary circle coincides with the centerline of the first imaginary circle, the centerline of the first imaginary circle may be the central axis of the first imaginary circle, and the centerline of the second imaginary circle may be the central axis of the second imaginary circle, and the first and second imaginary circles are spaced apart in the axial direction of the mounting shaft 20. It should be noted that the centerline of the first and second imaginary circles may both be set as the rotation axis of the mounting shaft 20, the first and second imaginary circles may be set as circles centered at a point on the rotation axis of the mounting shaft 20, the first and second imaginary circles having the same radius, the plurality of first mating structures 21 being spaced apart in sequence and uniformly spaced apart in the circumferential direction of the first imaginary circle, and the plurality of second mating structures 22 being spaced apart in sequence and uniformly spaced apart in the circumferential direction of the first imaginary circle.

[0065] By providing a plurality of first cooperating structures 21 and second cooperating structures 22, the frequency of the auxiliary spray arm 40 rotating forward and reversely around its own axis while rotating together with the main spray arm 30 can be increased, that is, the frequency of the swinging motion of the auxiliary spray arm 40 can be increased, so that the jet water flow at different angles can be used to rinse the laundry multiple times, making the jet water flow received by the laundry more uniform. Compared with normal washing, a better cleaning effect can be achieved with the same amount of water, and the amount of washing water can be saved.

[0066] In some embodiments of the present invention, Figure 1In the vertical direction, the projections of the multiple first matching structures 21 on the plane where the second imaginary circle is located are staggered with the multiple second matching structures 22 in the circumferential direction of the second imaginary circle. It should be explained that when the driven transmission member 41 is matched with the first matching structure 21, since the projections of the multiple first matching structures 21 on the plane where the second imaginary circle is located are staggered with the multiple second matching structures 22 in the circumferential direction of the imaginary circle, the driven transmission member 41 and the second matching structure 22 are not matched. When the driven transmission member 41 is matched with the second matching structure 22, the driven transmission member 41 and the first matching structure 21 are disengaged, thereby enabling the auxiliary spray arm 40 to swing back and forth around its own axis, that is, to achieve forward or reverse rotation of the auxiliary spray arm 40 around its own axis. This arrangement allows the auxiliary spray arm 40 to provide spray water at different angles through the back and forth swinging motion of the auxiliary spray arm 40 around its own axis when water enters the spray arm assembly 100, thereby ensuring that the items to be washed are flushed from different angles, further reducing dead corners in washing, and further improving the cleaning effect.

[0067] In some embodiments of the present invention, Figure 1 As shown, the mounting shaft 20 may include a first shaft body 23, a first mating piece 27, and a second mating piece 28. The main spray arm 30 is provided with the first shaft body 23. One end of the first shaft body 23 may be provided with the first mating piece 27, and the first mating structure 21 may be formed on the first mating piece 27. The other end of the first shaft body 23 may be provided with the second mating piece 28, and the second mating structure 22 may be formed on the second mating piece 28. It needs to be explained that the first shaft body 23 can pass through the main spray arm 30, the first fitting part 27 can be arranged at the upper end of the first shaft body 23, and the second fitting part 28 can be arranged at the lower end of the first shaft body 23, or the first fitting part 27 can be placed at the lower end of the first shaft body 23, and the second fitting part 28 can be arranged at the upper end of the first shaft body 23. Preferably, the first fitting part 27 is placed at the lower end of the first shaft body 23, and the second fitting part 28 is set at the upper end of the first shaft body 23. The main spray arm 30 is located between the first fitting part 27 and the second fitting part 28, and the first imaginary circle and the second imaginary circle are respectively located on the first fitting part 27 and the second fitting part 28. A plurality of first fitting structures 21 are arranged in sequence spaced apart in the circumferential direction of the first fitting part 27, and a plurality of second fitting structures 22 are arranged in sequence spaced apart in the circumferential direction of the second fitting part 28.

[0068] The main spray arm 30 drives the rotation of the first shaft body 23, and the main spray arm 30 and the auxiliary spray arm 40 rotate synchronously about the rotation axis of the mounting shaft 20. The first and second fittings 27 and 28 alternately cooperate with the auxiliary spray arm 40 to achieve forward and reverse rotation about its own axis. This optimizes the arrangement of the first and second fittings 27 and 28 and the first shaft body 23. When the spray arm assembly 100 is in operation, it can provide water jets at different angles, thereby flushing the laundry from different angles, reducing blind spots and improving the cleaning effect.

[0069] In some embodiments of the present invention, the driven transmission member 41 can be set as a driven bevel gear, and the first mating member 27 and the second mating member 28 can both be set as mating bevel gears. Further, the first mating member 27 can also be provided with a first avoidance portion 211, and the second mating member 28 can also be provided with a second avoidance portion 221. When the driven bevel gear and the first mating member 27 are in a meshing state, the driven bevel gear cooperates with the first mating structure 21, and the driven bevel gear is in an avoidance state with the second avoidance portion 221. When the driven bevel gear and the second mating member 28 are in a meshing state, the driven bevel gear cooperates with the second mating structure 22, and at this time the driven bevel gear and the first avoidance portion 211 are in an avoidance state.

[0070] It needs to be explained that in the process of the main spray arm 30 driving the mounting shaft 20 to rotate around the rotation axis of the mounting shaft 20, the main spray arm 30 and the auxiliary spray arm 40 rotate synchronously around the rotation axis of the mounting shaft 20. When the driven bevel gear is engaged with the first mating part 27, the driven transmission part 41 is in a state of mating with the first mating structure 21 relative to the first mating part 27, and the driven transmission part 41 is in a state of mating with the second avoidance part 221 relative to the second mating part 28. Therefore, the driven transmission part 41 is only connected to the first mating part 27 for transmission, and under the reaction force of the first mating structure 21, through the transmission connection of the gear, the mounting shaft 20 drives the auxiliary spray arm 40 to rotate synchronously around its own axis in the first direction, and the first direction rotation can be forward rotation.

[0071] When the driven bevel gear is engaged with the second mating piece 28, the driven transmission piece 41 is in a state of mating with the second mating structure 22 relative to the second mating piece 28, and the driven transmission piece 41 is in a state of mating with the first avoidance portion 211 relative to the first mating piece 27, so the driven transmission piece 41 is only connected to the second mating piece 28 for transmission. Under the reaction force of the second mating structure 22, through the transmission connection of the gear, the mounting shaft 20 drives the auxiliary spray arm 40 to rotate synchronously around its own axis in the second direction, and the second direction rotation can be reversed. Such alternating and repeated movements realize the back and forth swinging motion of the auxiliary spray arm 40 around its own axis.

[0072] Further, if Figure 1As shown, the number of the first matching structure 21 and the second matching structure 22 can be set to three. Figure 1 In the up and down directions, the three first matching structures 21 are arranged in one-to-one correspondence with the three second avoidance portions 221, and the three second matching structures 22 are arranged in one-to-one correspondence with the three first avoidance portions 211. The arc length of each first matching structure 21 on the first imaginary circle is the same as the arc length of the second avoidance portion 221 on the second imaginary circle, and the arc length of each second matching structure 22 on the second imaginary circle is equal to the arc length of the first avoidance portion 211 on the first imaginary circle. This arrangement can ensure that the driven transmission member 41 does not engage with the first matching structure 21 and the second matching structure 22 at the same time, and can realize the back and forth swing of the auxiliary spray arm 40 around its own axis.

[0073] However, the present invention is not limited to this. The first mating member 27 and the second mating member 28 can also be configured as an eccentric wheel structure. The first mating member 27 can be provided with one or more first mating structures 21, and the second mating member 28 can be provided with one or more second mating structures 22. For example, the first mating structure 21 can be configured as a half bevel gear or a quarter bevel gear, and the second mating structure 22 can be configured as a half bevel gear or a three-quarter bevel gear. As long as the first mating member 27 and the second mating member 28 are configured to alternately cooperate with the driven transmission member 41 to rotate the auxiliary spray arm 40 forward and reverse around its own axis, the configuration can be realized. Such a configuration can achieve alternating cooperation between the driven transmission member 41 and the first mating member 27 and the second mating member 28 by adding the first avoidance portion 211 and the second avoidance portion 221. When water flows into the spray arm assembly 100, the auxiliary spray arm 40 swings back and forth around its own axis to provide spray water at different angles, thereby flushing the laundry from different angles, reducing dead angles in the washing process, and improving the cleaning effect.

[0074] In some embodiments of the present invention, Figure 1 As shown, the first shaft body 23 can be integrally formed with one of the first mating piece 27 and the second mating piece 28, and the first shaft body 23 can be detachably connected to the other of the first mating piece 27 and the second mating piece 28. Preferably, the first mating piece 27 and the first shaft body 23 are integrally formed, and the second mating piece 28 is detachably connected to the first shaft body 23. When installing the main spray arm 30 to the mounting shaft 20, the second mating piece 28 can be first detached from the first shaft body 23. After the first shaft body 23 is passed through the main spray arm 30, the second mating piece 28 can be reattached to the first shaft body 23, positioning the main spray arm 30 between the first mating piece 27 and the second mating piece 28. This arrangement facilitates the removal and connection of the main spray arm 30 from the mounting shaft 20, allowing for quick assembly and disassembly of the spray arm assembly 100 and improving the ease of assembly and disassembly of the spray arm assembly 100.

[0075] In some embodiments of the present invention, Figure 1 As shown, the other one of the first fitting part 27 and the second fitting part 28 can be provided with a first latching protrusion 24, and the first shaft body 23 can be provided with a first latching groove 231, and the first latching groove 231 can be engaged with the first latching protrusion 24. It should be noted that the other one of the first fitting part 27 and the second fitting part 28 refers to a fitting part that is detachably connected to the first shaft body 23, for example: the first latching protrusion 24 is provided on the second fitting part 28, and the second fitting part 28 is provided with a gear hole corresponding to the axial diameter of the first shaft body 23, and the first latching protrusion 24 is provided on the inner wall of the gear hole. When the second fitting part 28 is connected to the first shaft body 23, the second fitting part 28 is sleeved on the first shaft body 23, the first shaft body 23 passes through the gear hole, and the first latching protrusion 24 engages with the first latching groove 2 The engagement with the first engaging member 231 can limit the rotation of the second engaging member 28 relative to the first shaft body 23 along the circumferential direction of the first shaft body 23, allowing the second engaging member 28 to rotate synchronously with the first shaft body 23. The number of the first engaging protrusion 24 and the first engaging groove 231 can be set to multiple. Preferably, the number of the first engaging protrusion 24 and the first engaging groove 231 is set to two. The two first engaging protrusions 24 are arranged opposite each other on the inner wall of the gear hole, and the two first engaging grooves 231 are arranged opposite each other on the first shaft body 23, with each first engaging protrusion 24 corresponding to each first engaging groove 231. This arrangement can limit the installation position of the second engaging member 28 on the first shaft body 23, realize the detachable connection between the second engaging member 28 and the first shaft body 23, and prevent the second engaging member 28 from rotating asynchronously with the first shaft body 23.

[0076] In some embodiments of the present invention, Figure 1 As shown, the spray arm assembly 100 may further include: a fixing member 50, one side of the other of the first mating member 27 and the second mating member 28 may be provided with the fixing member 50, the fixing member 50 may be provided with a second latching protrusion 51, the first shaft body 23 may be provided with a second latching groove 232, and the second latching groove 232 may be engaged with the second latching protrusion 51. It should be explained that the other of the first mating member 27 and the second mating member 28 refers to a mating member that is detachably connected to the first shaft body 23, such as Figure 1As shown, the fixing member 50 can be arranged on the upper side of the second fitting member 28. After the first shaft body 23 passes through the second fitting member 28, the fixing member 50 can be clamped on the upper end of the first shaft body 23. The fixing member 50 can be set to a circular ring structure, and the second clamping protrusion 51 can be set on the inner wall of the circular ring. When the fixing member 50 is installed on the first shaft body 23, the fixing member 50 can be sleeved on the first shaft body 23. The second clamping protrusion 51 is suitable for moving along the first clamping groove 231 toward the horizontal position of the second clamping groove 232. When the second clamping protrusion 51 moves to the horizontal position of the second clamping groove 232, the fixing member 50 is rotated toward the second clamping groove 232. The second clamping protrusion 51 is screwed from the first clamping groove 231 into the second clamping groove 232, and is clamped with the second clamping groove 232 to complete the connection with the first shaft body 23.

[0077] The fixing member 50 can limit the movement of the main spray arm 30 and the second matching member 28 in the height direction of the first shaft body 23. The height direction of the first shaft body 23 is Figure 1 In the vertical direction, the number of the second latching protrusion 51 and the second latching groove 232 can be multiple. Preferably, the number of the second latching protrusion 51 and the second latching groove 232 is set to two. The two second latching protrusions 51 are arranged opposite each other on the inner wall of the fixing member 50, and the two second latching grooves 232 are arranged opposite each other on the first shaft body 23. Each second latching protrusion 51 corresponds to each second latching groove 232. This arrangement can limit the movement of the main spray arm 30 and the second mating member 28 in the height direction of the first shaft body 23, preventing the main spray arm 30 and the second mating member 28 from sliding up and down when the spray arm assembly 100 is in operation, thereby improving the stability of the spray arm assembly 100 and preventing the main spray arm 30 from separating from the first shaft body 23.

[0078] In some embodiments of the present invention, Figure 1 As shown, the mounting shaft 20 may further include: a second shaft body 25, and the first shaft body 23 and the second shaft body 25 may be configured to be detachably connected. It should be noted that the upper end of the second shaft body 25 is detachably connected to the first shaft body 23, as shown in FIG. Figure 1 As shown, the lower end of the second shaft body 25 is connected to the spray arm base 10, the second shaft body 25 is in communication with the first shaft body 23, and the second shaft body 25 is assembled with the first mating member 27, which rotates about the rotation axis of the mounting shaft 20. This arrangement improves the convenience of assembling and disassembling the spray arm assembly 100. In addition, the second shaft body 25 is fixedly disposed within the inner cavity of the spray arm base 10, which can increase the contact area between the second shaft body 25 and the spray arm base 10, thereby improving the structural stability of the spray arm assembly 100 during operation.

[0079] In some embodiments of the present invention, the first shaft body 23 may be sleeved on the outside of the second shaft body 25, the outer peripheral wall of the second shaft body 25 may be provided with a limiting protrusion 251, and the inner peripheral wall of the first shaft body 23 may be provided with a limiting groove 233, and the limiting protrusion 251 and the limiting groove 233 may be screwed together. It should be noted that the upper outer peripheral wall of the second shaft body 25 may be provided with multiple limiting protrusions 251, and the multiple limiting protrusions 251 are spaced along the circumference of the second shaft body 25 on the outer peripheral arm of the second shaft body 25, and the lower inner peripheral wall of the first shaft body 23 may be provided with multiple limiting grooves 233, and the multiple limiting protrusions 251 and the multiple limiting grooves 233 are screwed together. Preferably, the number of the limiting protrusions 251 and the limiting grooves 233 can be set to four, and the four limiting protrusions 251 correspond to the four limiting grooves 233. The limiting protrusions 251 and the limiting grooves 233 engage with each other to connect the first shaft body 23 and the second shaft body 25. This arrangement can achieve a detachable connection between the first shaft body 23 and the second shaft body 25, which can improve the convenience of disassembling and assembling the spray arm assembly 100.

[0080] In some embodiments of the present invention, Figure 1 As shown, the mounting shaft 20 may be provided with a third mating portion 26, the spray arm seat 10 may be provided with a fourth mating portion 11, the main spray arm 30 may be provided with an active transmission member 31, and the third mating portion 26 and the fourth mating portion 11 may simultaneously engage with the active transmission member 31. It should be noted that the third matching portion 26 can be fixedly connected to the mounting shaft 20, the third matching portion 26 is located below the first matching structure 21, the third matching portion 26 can rotate synchronously with the first matching structure 21, the fourth matching portion 11 can be fixedly connected to the spray arm seat 10, the fourth matching portion 11 is located below the third matching portion 26, the fourth matching portion 11 is a fixed portion, and the fourth matching portion 11 cannot rotate relative to the spray arm seat 10. The active transmission member 31 is detachably connected to the main spray arm 30, and the active transmission member 31 can follow the main spray arm 30 to rotate around the rotation axis of the mounting shaft 20. When the main spray arm 30 rotates around its own axis of the mounting shaft 20, the active transmission member 31 rotates synchronously with the main spray arm 30. At this time, the active transmission member 31 cooperates with the third matching portion 26, and the third matching portion 26 is driven to rotate through the cooperation between the active transmission member 31 and the third matching portion 26, that is, the mounting shaft 20 rotates following the rotation of the main spray arm 30. This arrangement enables the main spray arm 30 to drive the installation shaft 20 to rotate. The main spray arm 30 and the installation shaft 20 drive each other to rotate around the axis of the installation shaft 20. When the installation shaft 20 rotates, the driven transmission member 41 can be connected to the first matching structure 21 or the second matching structure 22.

[0081] In some embodiments of the present invention, Figure 2As shown, the mounting shaft 20 may further include: a third fitting member 29, the third fitting portion 26 may be formed on the third fitting member 29, the spray arm seat 10 may include: a fourth fitting member 13 and a seat body 12, the mounting shaft 20 may rotate relative to the seat body 12, the fourth fitting member 13 may be arranged on the seat body 12, the fourth fitting portion 11 may be formed on the fourth fitting member 13, and the third fitting member 29 and the fourth fitting member 13 may be arranged coaxially. It should be explained that the third mating member 29 can be disposed below the first mating member 27 and be closely connected to the first mating member 27. For example, the third mating member 29 and the first mating member 27 are integrally formed and rotate synchronously with the first mating member 27. The seat body 12 can be connected to the mounting shaft 20, and the mounting shaft 20 can rotate relative to the seat body 12. The fourth mating member 13 can be disposed below the third mating member 29 and can be snapped onto the seat body 12. When the main spray arm 30 rotates about the axis of the mounting shaft 20, the active transmission member 31 rotates synchronously with the main spray arm 30. At this time, the active transmission member 31 cooperates with the third mating member 29. The cooperation between the active transmission member 31 and the third mating member 29 drives the third mating member 29 to rotate, that is, the mounting shaft 20 rotates in accordance with the rotation of the main spray arm 30. This arrangement enables the main spray arm 30 to drive the rotation of the mounting shaft 20.

[0082] In some embodiments of the present invention, a fourth mating member 13 may be sleeved onto the outer side of the base body 12. The fourth mating member 13 may be provided with an elastic snap 112. The outer peripheral wall of the base body 12 may be provided with a mating protrusion 121. The elastic snap 112 and the mating protrusion 121 may be configured to engage with each other in a staggered manner. It should be noted that the fourth mating member 13 is detachably connected to the base body 12, and the fourth mating member 13 and the base body 12 may be engaged with each other in a staggered manner through the elastic snap 112 and the mating protrusion 121. This arrangement can provide a more stable connection between the fourth mating member 13 and the base body 12. Furthermore, the staggered engagement facilitates disassembly, thereby improving the efficiency of assembly and disassembly of the spray arm assembly 10.

[0083] like Figure 9 and Figure 12As shown, the elastic buckle 112 may include: a first buckle portion 1121 and a second buckle portion 1122, and the matching protrusion 121 may include: a first buckle portion 1211 and a second buckle portion 1212, the first buckle portion 1121 is suitable for being snap-fitted with the first buckle portion 1211, and the second buckle portion 1122 is suitable for being snap-fitted with the second buckle portion 1212, the number of the elastic buckle 112 and the matching protrusion 121 can be set to multiple, and multiple elastic buckles 112 are staggered and snap-fitted with multiple matching protrusions 121, preferably, the number of the first buckle portion 1121 and the first buckle portion 1211 can be set to four, each first buckle portion 1121 and each first buckle portion 1211 correspond one-to-one, the number of the second buckle portion 1122 and the second buckle portion 1212 can be set to two, each second buckle portion 1122 and each second buckle portion 1212 correspond one-to-one. Such a configuration can limit the rotation of the fourth fitting member 13 by the engagement between the elastic buckle 112 and the engaging protrusion 121 , thereby ensuring that the positions of the fourth fitting member 13 and the seat body 12 are relatively fixed, thereby ensuring the working stability of the spray arm assembly 100 .

[0084] In some embodiments of the present invention, the active transmission member 31 can be configured as an active cylindrical gear, and the third mating member 29 and the fourth mating member 13 can both be configured as mating cylindrical gears. It should be noted that the active cylindrical gear can be mated with both mating cylindrical gears simultaneously. This arrangement can achieve the technical effect of enabling the main spray arm 30 to drive the installation shaft 20 to rotate about its own axis.

[0085] In some embodiments of the present invention, the number of teeth of the fourth matching member 13 is different from the number of teeth of the third matching member 29 . It should be explained that the number of teeth of the third matching member 29 can be smaller than the number of teeth of the fourth matching member 13. During the rotation of the main spray arm 30 around the axis of the mounting shaft 20, by making the number of teeth of the third matching member 29 smaller than the number of teeth of the fourth matching member 13, when the main spray arm 30 rotates one circle around the central axis of the mounting shaft 20, the third matching member 29 will rotate by an angle of a certain number of teeth in the opposite direction to the rotation of the main spray arm 30 around the axis of the mounting shaft 20, wherein the certain number of teeth refers to the difference between the number of teeth of the third matching member 29 and the number of teeth of the fourth matching member 13. The number of teeth of the third matching member 29 can be 1, 2 or 3 less than the number of teeth of the fourth matching member 13. For example, when the number of teeth of the third matching member 29 can be 1 less than the number of teeth of the fourth matching member 13, when the main spray arm 30 rotates one circle around the axis of the mounting shaft 20, the third matching member 29 will rotate by an angle of one tooth in the opposite direction to the rotation of the main spray arm 30 around the axis of the mounting shaft 20. This arrangement allows the third matching part 29 to rotate slowly in the direction of rotation around the axis of the mounting shaft 20, so that the swinging position of the main spray arm 30 and the auxiliary spray arm 40 will change by one tooth angle every time they rotate one circle, and will not swing at the same position every circle. It can provide spray water flow at different angles, flush the objects to be washed from different angles, further reduce dead corners in washing, and improve the cleaning effect.

[0086] Furthermore, in some other embodiments of the present invention, the number of teeth of the third mating component 29 may be greater than the number of teeth of the fourth mating component 13. During the process of the main spray arm 30 rotating around the central axis of the mounting shaft 20, by making the number of teeth of the third mating component 29 greater than the number of teeth of the fourth mating component 13, when the main spray arm 30 rotates around the central axis of the mounting shaft 20 one circle, the third mating component 29 will rotate by an angle of a certain number of teeth in the same direction as the rotation of the main spray arm 30 around the central axis of the mounting shaft 20, wherein the certain number of teeth refers to the difference between the number of teeth of the third mating component 29 and the number of teeth of the fourth mating component 13. The number of teeth of the third mating component 29 may be 1, 2, or 3 more than the number of teeth of the fourth mating component 13. For example, when the number of teeth of the third mating component 29 may be 1 more than the number of teeth of the fourth mating component 13, when the main spray arm 30 rotates around the central axis of the mounting shaft 20 one circle, the third mating component 29 will rotate by an angle of one tooth in the same direction as the rotation of the main spray arm 30 around its own axis of the mounting shaft 20. This arrangement allows the third matching piece 29 to slowly rotate in the direction of its own axis of rotation of the mounting shaft 20, so that the swinging position of the main spray arm 30 and the auxiliary spray arm 40 will change by one tooth angle every time they rotate one circle, and will not swing at the same position every circle. It can provide spray water flow at different angles, flush the objects to be washed from different angles, further reduce dead corners in washing, and improve the cleaning effect.

[0087] In some embodiments of the present invention, the main spray arm 30 may include: a spray arm body 32 and a connecting shaft 33. The spray arm body 32 may be provided with a mounting hole 321, through which the mounting shaft 20 may be passed. The connecting shaft 33 may be provided below the spray arm body 32, and the mounting hole 321 and the connecting shaft 33 may be spaced apart in the length direction of the main spray arm 30. The active transmission member 31 may be sleeved on the outside of the connecting shaft 33, and the active transmission member 31 may be rotatable relative to the connecting shaft 33. It should be noted that the connecting shaft 33 may be provided on a side of the mounting shaft 20 away from the auxiliary spray arm 40. The spray arm body 32 may be provided with a connecting hole, and the connecting shaft 33 may extend into the spray arm body 32 to connect with the connecting hole. The connecting shaft 33 and the connecting hole may be detachably connected by means of a snap connection or a threaded connection. The active transmission member 31 may be sleeved on the connecting shaft 33, and the active transmission member 31 may be rotatable about the central axis of the connecting shaft 33. Such an arrangement can realize the transmission connection between the main spray arm 30 and the mounting shaft 20 , and can ensure the reliability of the operation of the spray arm assembly 100 .

[0088] In some embodiments of the present invention, the main spray arm 30 may be provided with a plurality of main spray holes 34 and a main flow channel 35, and the plurality of main spray holes 34 are all connected to the main flow channel 35. A water inlet channel 36 may be provided in the mounting shaft 20, and the main flow channel 35 may be connected to the water inlet channel 36. It should be explained that when the spray arm assembly 100 is working, water can flow into the spray arm seat 10 through the water inlet 14 of the spray arm seat 10, and then flow from the spray arm seat 10 into the water inlet channel 36 of the mounting shaft 20. Then, water flows from the water inlet channel 36 into the main flow channel 35 and is sprayed out along the main spray holes 34 in the main flow channel 35. The main spray arm 30 can spray washing water on the laundry through the plurality of main spray holes 34. This arrangement enables the spray arm assembly 100 to flush the laundry from different angles, reduce dead corners in washing, and improve the cleaning effect.

[0089] In some embodiments of the present invention, Figure 1 As shown, the water flow ejected from the main spray hole 34 can drive the main spray arm 30 to rotate around the axis of the mounting shaft 20. It should be noted that the main spray hole 34 may include: a cleaning hole 421 and a driving hole 422. The number of cleaning holes 421 and driving holes 422 can be set to multiple. The cleaning hole 421 can be set above the main spray arm 30. The water flow ejected from the cleaning hole 421 is used to flush the items to be washed. The driving hole 422 can be set on the side wall of the main spray arm 30 to ensure that the water flow ejected from the driving hole 422 can provide driving force for the main spray arm 30 to rotate around the axis of the mounting shaft 20. This arrangement can drive the spray arm assembly 100 to rotate through the reaction force of the water flow, which can save energy, eliminate the need for a separate driving device, reduce the cost of the spray arm assembly 100, and improve the convenience of the spray arm assembly 100.

[0090] In some embodiments of the present invention, the auxiliary spray arm 40 can be provided with a plurality of auxiliary spray holes 42 and a secondary flow channel 423, and the plurality of auxiliary spray holes 42 and the water inlet flow channel 36 are all connected to the secondary flow channel 423. It should be noted that when the spray arm assembly 100 is working, water can flow into the spray arm seat 10 through the water inlet 14 of the spray arm seat 10, and then flow from the spray arm seat 10 into the water inlet flow channel 36 of the mounting shaft 20. Then, the water flow is divided in the water inlet flow channel 36, with one part flowing into the main channel 35 and the other part flowing into the secondary flow channel 423, and then sprayed out along the auxiliary spray holes 42 in the secondary flow channel 423. The auxiliary spray arm 40 can spray washing water on the laundry through the plurality of auxiliary spray holes 42. This arrangement enables the spray arm assembly 100 to flush the laundry from different angles, reduce dead corners in washing, and improve the cleaning effect.

[0091] In some embodiments of the present invention, Figure 5 As shown, the auxiliary spray hole 42 may also include: a cleaning hole 421 and a driving hole 422. It should be noted that the driving hole 422 can be set on at least one of the auxiliary spray arm 40 and the main spray arm 30. For example, if the driving hole 422 is set on both the auxiliary spray arm 40 and the main spray arm 30, the driving hole 422 on the auxiliary spray arm 40 and the driving hole 422 on the main spray arm 30 should be set in opposite directions. For example, the driving hole 422 on the auxiliary spray arm 40 is set in front of the auxiliary spray arm 40, and the driving hole 422 on the main spray arm 30 is set behind the main spray arm 30, to ensure that the driving force brought by the driving hole 422 on the auxiliary spray arm 40 is opposite to the driving force brought by the driving hole 422 on the main spray arm 30, so as to better provide power for the spray arm assembly 100.

[0092] A dishwasher according to an embodiment of the present invention includes the spray arm assembly 100 of the above embodiment. The spray arm assembly 100 can be installed on the dishwasher. Through the cooperation of the spray arm base 10, the mounting shaft 20, the main spray arm 30 and the auxiliary spray arm 40, the auxiliary spray arm 40 can rotate forward and reverse around its own axis while rotating together with the main spray arm 30, thereby providing spray water flow at different angles, flushing the laundry from different angles, reducing dead corners in washing, and improving the cleaning effect.

[0093] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0094] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. A spray arm assembly, characterized in that: include: Spray arm seat; A mounting shaft, the mounting shaft being rotatably mounted on the spray arm seat; A main spray arm, the main spray arm is rotatably mounted on the mounting shaft, and the main spray arm is drivingly connected to the spray arm seat and the mounting shaft; an auxiliary spray arm, the auxiliary spray arm being rotatably mounted on the main spray arm and being in driving connection with the mounting shaft so as to rotate forward and reversely about its own axis while the auxiliary spray arm rotates along with the main spray arm; The mounting shaft has a first matching portion and a second matching portion, and the auxiliary spray arm has a driven transmission member, and the driven transmission member alternately matches with the first matching portion and the second matching portion. Wherein, when the driven transmission member is engaged with the first engaging portion, the auxiliary spray arm rotates around a first direction, and when the driven transmission member is engaged with the second engaging portion, the auxiliary spray arm rotates around a second direction, and the first direction is opposite to the second direction; The mounting shaft comprises: a first shaft body, the first shaft body being passed through the main spray arm; a first matching piece, the first matching piece being provided at one end of the first shaft body, the first matching portion being formed on the first matching piece; a second matching piece, the second matching piece being provided at the other end of the first shaft body, the second matching portion being formed on the second matching piece; The driven transmission member is a driven bevel gear, and the first matching member and the second matching member are matching bevel gears. In which, the first mating piece also has a first avoidance portion, and the second mating piece also has a second avoidance portion. When the driven bevel gear is engaged with the first mating piece, the driven bevel gear is engaged with the first mating portion and avoids the second avoidance portion. When the driven bevel gear is engaged with the second mating piece, the driven bevel gear is engaged with the second mating portion and avoids the first avoidance portion.

2. The spray arm assembly according to claim 1, wherein: The rotation axis of the mounting shaft coincides with the rotation axis of the main spray arm.

3. The spray arm assembly according to claim 1, wherein: The rotation axis of the main spray arm is perpendicular to the axis of the auxiliary spray arm.

4. The spray arm assembly according to claim 1, wherein: The first matching portion and the second matching portion are spaced apart in the axial direction of the installation shaft.

5. The spray arm assembly according to claim 1, wherein: The first matching portion and the second matching portion each include a plurality of first matching portions, the plurality of first matching portions are spaced apart in the circumferential direction of a first imaginary circle, and the plurality of second matching portions are spaced apart in the circumferential direction of a second imaginary circle. The center line of the first imaginary circle coincides with the center line of the second imaginary circle, and the first imaginary circle and the second imaginary circle are spaced apart in the axial direction of the installation shaft.

6. The spray arm assembly according to claim 5, characterized in that The projections of the plurality of first matching portions on the plane where the second imaginary circle is located and the plurality of second matching portions are arranged alternately in the circumferential direction of the imaginary circle.

7. The spray arm assembly according to claim 1, wherein: One of the first fitting member and the second fitting member is integrally formed with the first shaft body, and the other of the first fitting member and the second fitting member is detachably connected to the first shaft body.

8. The spray arm assembly according to claim 7, wherein: The other one of the first matching piece and the second matching piece has a first locking protrusion, the first shaft body has a first locking groove, and the first locking protrusion is engaged with the first locking groove.

9. The spray arm assembly according to claim 7, wherein: Also includes: A fixing member is provided on one side of the other of the first matching member and the second matching member, the fixing member has a second locking protrusion, the first shaft body has a second locking groove, and the second locking protrusion is engaged with the second locking groove.

10. The spray arm assembly according to claim 1, wherein: The mounting shaft further includes a second shaft body, wherein the second shaft body is detachably connected to the first shaft body.

11. The spray arm assembly according to claim 10, wherein: The first shaft body is sleeved on the outside of the second shaft body, the outer peripheral wall of the second shaft body has a limiting protrusion, the inner peripheral wall of the first shaft body has a limiting groove, and the limiting protrusion is screwed together with the limiting groove.

12. The spray arm assembly according to claim 1, wherein: The mounting shaft has a third matching portion, the spray arm seat has a fourth matching portion, and the main spray arm has an active transmission member, which is matched with the third matching portion and the fourth matching portion at the same time.

13. The spray arm assembly according to claim 12, wherein: The mounting shaft includes a third matching piece, the third matching portion is formed on the third matching piece, and the spray arm seat includes: a seat body, wherein the mounting shaft is rotatably disposed on the seat body; A fourth matching piece is provided on the seat body, the fourth matching portion is formed on the fourth matching piece, and the fourth matching piece is coaxially arranged with the third matching piece.

14. The spray arm assembly according to claim 13, wherein: The fourth matching piece is sleeved on the outer side of the seat body, the fourth matching piece has an elastic buckle, the outer peripheral wall of the seat body has a matching buckle, and the elastic buckle is staggered with the matching buckle.

15. The spray arm assembly according to claim 13, wherein: The active transmission member is an active cylindrical gear, and the third matching member and the fourth matching member are matching cylindrical gears.

16. The spray arm assembly according to claim 15, wherein: The number of teeth of the third matching member is not equal to the number of teeth of the fourth matching member.

17. The spray arm assembly according to claim 12, wherein: The main spray arm comprises: A spray arm body, wherein the spray arm body has a mounting hole, and the mounting shaft is passed through the mounting hole; A connecting shaft is provided on the spray arm body and is spaced apart from the mounting hole. The active transmission member is rotatably provided on the connecting shaft.

18. The spray arm assembly according to any one of claims 1 to 17, characterized in that: The main spray arm has a main flow channel and a plurality of main spray holes, the main flow channel is communicated with the main spray holes, and the mounting shaft has a water inlet flow channel, the water inlet flow channel is communicated with the main flow channel.

19. The spray arm assembly according to claim 18, wherein: The main spray arm is adapted to rotate around the axis of the mounting shaft under the drive of the water flow sprayed from the main spray hole.

20. The spray arm assembly of claim 18, wherein: The auxiliary spray arm has an auxiliary flow channel and a plurality of auxiliary spray holes, and the auxiliary flow channel is communicated with the auxiliary spray holes and the water inlet flow channel.

21. A dishwasher, characterized in that: Comprising the spray arm assembly according to any one of claims 1-20.

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