Gushing arm assembly and dish washing machine with same

Abstract

The utility model discloses a gushing arm assembly and a dish washing machine with the gushing arm assembly. The main spraying arm is rotatably arranged on the central gear around a first axis, the first axis coincides with the central axis of the central gear, and a first spraying hole communicating with the first inner cavity is formed in the main spraying arm; the auxiliary spraying arm is rotatably arranged on the main spraying arm, the rotating axis of the auxiliary spraying arm and the first axis are parallel and arranged at an interval, a plurality of second spraying holes communicating with the second inner cavity are formed in the auxiliary spraying arm, and the gear assembly is in transmission connection between the center gear and the auxiliary spraying arm; the ratio of the rotation speed of the auxiliary spraying arm to the rotation speed of the main spraying arm is 1: 1, and the movement tracks of the first spraying hole and the second spraying holes are overlapped to define an approximately rectangular washing area. According to the spraying arm assembly, the spraying arm assembly can be fully matched with a washing area of the dish washing machine, washing dead angles are avoided, and therefore the washing effect and the use experience of a user are effectively improved.

Description

Technical Field

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

[0002] Household dishwashers are intelligent home appliances that replace manual dishwashing. Depending on their width, cabinet dishwashers can be divided into 60cm and 45cm models; the former is approximately 60cm wide, and the latter is approximately 45cm wide. The working principle of a dishwasher is as follows: several rotating spray arms inside continuously cover and wash the dishes with spray, combining the effects of water reflection, splashing, and flowing to complete the cleaning process.

[0003] In the prior art, because the shape of the dish rack area inside the dishwasher is close to rectangular, while the spray area that the rotating spray arm can reach is circular, this will affect the washing effect of the washing area at the four corners of the rectangular dishwasher, and may even create washing dead zones, thus significantly affecting the overall cleaning effect. Utility Model Content

[0004] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention provides a spray arm assembly that can fully conform to the washing area of ​​the dishwasher, avoiding washing dead zones, thereby effectively improving washing performance and user experience.

[0005] This utility model also proposes a dishwasher having the above-mentioned spray arm assembly.

[0006] According to a first aspect of the present invention, the spray arm assembly includes: a central gear; a main spray arm rotatably mounted on the central gear about a first axis, the first axis coinciding with the central axis of the central gear, the main spray arm defining a first inner cavity, and the main spray arm having a first spray hole communicating with the first inner cavity; a secondary spray arm rotatably mounted on the main spray arm, the secondary spray arm having a rotation axis parallel to and spaced apart from the first axis, the secondary spray arm defining a second inner cavity, and the secondary spray arm having a plurality of second spray holes communicating with the second inner cavity; and a gear assembly drivingly connected between the central gear and the secondary spray arm, wherein the ratio of the rotational speed of the secondary spray arm to the rotational speed of the main spray arm is 1:1, and the superimposed motion trajectories of the first spray hole and the plurality of second spray holes define a roughly rectangular washing area.

[0007] According to the spray arm assembly of this utility model, a central gear, a main spray arm, a secondary spray arm, and a gear assembly are arranged in the spray arm assembly. The main spray arm is rotatably mounted on the central gear around a first axis, the first axis being coincident with the central axis of the central gear. A first inner cavity is defined inside the main spray arm, and a first spray hole communicating with the first inner cavity is formed on the main spray arm. The secondary spray arm is rotatably mounted on the main spray arm, and the rotation axis of the secondary spray arm is parallel to and spaced apart from the first axis. A second inner cavity is defined inside the secondary spray arm, and multiple second spray holes communicating with the second inner cavity are formed on the secondary spray arm. The gear assembly is driven between the central gear and the secondary spray arm. The rotation speed of the secondary spray arm is 1:1 to the rotation speed of the main spray arm, and the motion trajectories of the first spray hole and the multiple second spray holes are superimposed to define a roughly rectangular washing area. This can fully match the washing area of ​​the dishwasher, avoid washing dead corners, and thus effectively improve the washing effect and user experience.

[0008] In some embodiments, the spray arm assembly is configured such that the movement trajectories of the first spray hole and a plurality of second spray holes overlap to define a generally square washing area.

[0009] In some embodiments, there are two auxiliary spray arms, and the second spray holes are formed at both ends of the two auxiliary spray arms in the length direction. The second spray holes at both ends of the auxiliary spray arms are arranged symmetrically about the rotation axis of the auxiliary spray arms. The two auxiliary spray arms are arranged at the same end of the main spray arm in the length direction, and the rotation axes of the two auxiliary spray arms are collinear.

[0010] In some embodiments, both of the secondary spray arms extend along a straight line and are arranged at an angle; and / or, the two secondary spray arms are integrally formed, and the plurality of second spray holes of the two secondary spray arms are arranged rotationally symmetrically about the rotation axis of the secondary spray arms.

[0011] In some embodiments, the included angle between the two auxiliary spray arms is 90°.

[0012] In some embodiments, there are two auxiliary spray arms, and the second spray hole is formed at both ends of the length direction of the two auxiliary spray arms. The two auxiliary spray arms are respectively arranged at both ends of the length direction of the main spray arm. The rotation axes of the two auxiliary spray arms are symmetrically arranged about the first axis. The two auxiliary spray arms extend along a straight line and are perpendicular to each other.

[0013] In some embodiments, there are two auxiliary spray arms, namely a first spray arm and a second spray arm. The first spray arm is disposed at one end of the main spray arm in the length direction and is rotatably connected to the main spray arm. The second spray arm is disposed at the other end of the main spray arm in the length direction and is rotatably connected to the main spray arm. The first spray arm rotates about the rotation axis of the first spray arm in the opposite direction to the rotation direction of the main spray arm. The second spray arm rotates about the rotation axis of the second spray arm in the opposite direction to the rotation direction of the main spray arm.

[0014] In some embodiments, the gear assembly includes a first gear and a drive wheel, wherein the first gear is coaxially fixed with the auxiliary spray arm, the drive wheel is drively connected between the first gear and the central gear, and the central gear has the same number of teeth as the first gear.

[0015] In some embodiments, the number of transmission wheels connected between the first gear and the central gear is odd.

[0016] The dishwasher according to the second aspect of the present invention includes the spray arm assembly according to the first aspect of the present invention.

[0017] According to the second aspect of the present invention, the dishwasher, by setting the spray arm assembly of the first aspect, can fully conform to the washing area of ​​the dishwasher, avoid washing dead corners, and thus effectively improve the washing effect and the user experience.

[0018] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] Figure 1 This is a top view of a spray arm assembly according to some embodiments of the present invention;

[0020] Figure 2 This is a top view of a spray arm assembly according to some other embodiments of the present invention;

[0021] Figure 3 This is a bottom view of a spray arm assembly according to some other embodiments of the present invention;

[0022] Figure 4 This is a top view of a spray arm assembly according to some other embodiments of the present invention;

[0023] Figure 5 This is a bottom view of a spray arm assembly according to some other embodiments of the present invention.

[0024] Figure label:

[0025] 100. Spray arm assembly;

[0026] 10. Center gear; 101. First through hole;

[0027] 20. Main spray arm; 201. First axis; 21. First spray nozzle;

[0028] 30. Secondary spray arm; 31. Second spray nozzle; 32. First spray arm; 33. Second spray arm;

[0029] 40. Gear assembly; 41. First gear; 410. Third through hole; 42. Transmission wheel; 420. Fourth through hole. Detailed Implementation

[0030] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0031] The following is for reference. Figures 1-5 A spray arm assembly 100 according to a first aspect embodiment of the present invention is described.

[0032] like Figures 1-5 As shown, the spray arm assembly 100 according to the first aspect of the present invention includes: a central gear 10, a main spray arm 20, a secondary spray arm 30, and a gear assembly 40.

[0033] The main spray arm 20 is rotatably mounted on the central gear 10 around the first axis 201, which coincides with the central axis of the central gear 10. The main spray arm 20 defines a first inner cavity, and a first spray hole 21 communicating with the first inner cavity is formed on the main spray arm 20. The auxiliary spray arm 30 is rotatably mounted on the main spray arm 20. The rotation axis of the auxiliary spray arm 30 is parallel to the first axis 201 and arranged at intervals. The auxiliary spray arm 30 defines a second inner cavity, and a plurality of second spray holes 31 communicating with the second inner cavity are formed on the auxiliary spray arm 30. The gear assembly 40 is driven between the central gear 10 and the auxiliary spray arm 30. The ratio of the rotation speed of the auxiliary spray arm 30 to the rotation speed of the main spray arm 20 is 1:1, and the motion trajectories of the first spray hole 21 and the plurality of second spray holes 31 superimpose to define a roughly rectangular washing area.

[0034] It should be noted that a transmission connection refers to connecting two or more components together through a certain assembly method to achieve the transmission of force or power. A transmission connection can effectively transfer force or power from one component to another, thereby enabling the entire system to operate normally. The two components in a transmission connection can be directly or indirectly connected, as long as the transmission of force is achieved.

[0035] In a specific example, such as Figure 3 and Figure 5 As shown, the dishwasher is equipped with a spray arm seat. A first through hole 101 is provided in the central gear 10, extending through the central gear 10 along its thickness direction. The periphery of the first through hole 101 is engaged with the outer circumferential surface of the spray arm seat, meaning the central gear 10 is fixedly mounted on the top of the spray arm seat. Furthermore, a water guide pipe extending vertically is provided on the lower side of the main spray arm 20. The first axis 201 coincides with the central axis of the central gear 10 and the central axis of the water guide pipe. The water guide pipe is integrally formed with the main spray arm 20. A first water inlet is provided at the lower end of the water guide pipe, which is inserted into the spray arm seat. The water guide pipe can rotate relative to the spray arm seat, meaning the main spray arm 20 can rotate relative to the spray arm seat and the central gear 10.

[0036] In a specific example, the dishwasher also includes a washing pump, and the main spray arm 20 has a first drive spray hole communicating with the first inner cavity. The orientation of the first drive spray hole can be designed according to washing requirements. When the dishwasher's washing pump operates, it pumps the water used for washing through the first inlet into the water pipe, and then pumps the water into the first inner cavity. A portion of the water is then sprayed out through the first spray hole 21 for washing, while the other portion is sprayed out through the first drive spray hole. When the water is sprayed out from the first drive spray hole, it provides a reverse pushing force, causing the main spray arm 20 to rotate around the first axis 201. This allows the water sprayed from the first spray hole 21 on the main spray arm 20 to rotate and spray the dishes, effectively improving the dishwasher's washing effect.

[0037] Furthermore, the main spray arm 20 is elongated, and the number of first spray holes 21 can be multiple, for example, three, four, five, six, or more than seven. These multiple first spray holes 21 are arranged at intervals along the length of the main spray arm 20. In a specific example, such as... Figure 1 As shown, there are five first spray holes 21, and all of the first spray holes 21 are arranged on one side of the main spray arm 20 along its length.

[0038] In a specific example, such as Figures 1-3As shown, a first water outlet is provided on the upper surface of one end of the main spray arm 20, and a second water inlet is provided on the lower surface of the auxiliary spray arm 30. The first water outlet and the second water inlet are connected, so that the first inner cavity and the second inner cavity can be connected. Furthermore, a second through hole is opened at the center of the first water outlet of the main spray arm 20, and a first central column extending in the vertical direction is provided at the center of the second water inlet of the auxiliary spray arm 30. The rotation axis of the auxiliary spray arm 30 coincides with the central axis of the first central column. The upper end of the first central column is integrally formed with the auxiliary spray arm 30, and the lower end of the first central column passes through the second through hole and is engaged with one end of the gear assembly 40. The other end of the gear assembly 40 is connected to the central gear 10.

[0039] Furthermore, the number of second spray holes 31 can be multiple, for example, three, four, five, six, or more than seven, with multiple second spray holes 31 arranged at intervals along the length of the auxiliary spray arm 30. In a specific example, a second drive spray hole communicating with the second inner cavity is also formed on the auxiliary spray arm 30, and the orientation of the second drive spray hole can be designed according to the washing requirements. When the dishwasher's washing pump is working, the washing pump can pump the water used for washing through the first water inlet into the water guide pipe, the first inner cavity, the first water outlet, the second water inlet, and the second inner cavity. Finally, a portion of the water is sprayed out from the second spray holes 31 for spray washing, and another portion of the water is sprayed out through the second drive spray holes.

[0040] When water is ejected from the second drive nozzle, the water flow can provide a reverse thrust to the second drive nozzle, thereby causing the auxiliary spray arm 30 to rotate relative to the main spray arm 20 about its rotation axis. In addition, since the gear assembly 40 is connected between the central gear 10 and the auxiliary spray arm 30, the rotation of the auxiliary spray arm 30 about its rotation axis relative to the main spray arm 20 can drive the main spray arm 20 to rotate about the first axis 201 through the gear assembly 40, and the rotation direction of the auxiliary spray arm 30 about its rotation axis relative to the main spray arm 20 is opposite to the rotation direction of the main spray arm 20. In other words, the main spray arm 20 can rotate around the first axis 201, and the auxiliary spray arm 30 revolves around the first axis 201 along with the main spray arm 20. At the same time, the auxiliary spray arm 30 rotates about its rotation axis relative to the main spray arm 20, and the direction of the rotation of the auxiliary spray arm 30 about its rotation axis relative to the main spray arm 20 is opposite to the direction of the rotation of the main spray arm 20 around the first axis 201.

[0041] For example, when the main spray arm 20 rotates clockwise around the first axis 201, the auxiliary spray arm 30 rotates clockwise along with the main spray arm 20 around the first axis 201. Simultaneously, the auxiliary spray arm 30 rotates counterclockwise relative to the main spray arm 20 around its rotation axis. Figures 1-3As shown, since the rotation speed of the auxiliary spray arm 30 is 1:1 to that of the main spray arm 20, the washing areas of the washing water sprayed from the first spray hole 21 and the multiple second spray holes 31 overlap to form a roughly rectangular or square washing area. Since the washing area of ​​the dishwasher is a rectangular or square area, it can fully cover the washing area of ​​the dishwasher and eliminate the washing dead corners at the four corners of the washing area.

[0042] In this embodiment, when the spray arm assembly 100 is working, the main spray arm 20 rotates around the first axis 201, and the auxiliary spray arm 30 revolves around the first axis 201 along with the main spray arm 20. At the same time, the auxiliary spray arm 30 rotates relative to the main spray arm 20 around its rotation axis. The direction of the auxiliary spray arm 30's rotation relative to the main spray arm 20 is opposite to the direction of the main spray arm 20's rotation. The rotational speed of the auxiliary spray arm 30's rotation relative to the main spray arm 20 is the same as the rotational speed of the main spray arm 20 around the first axis 201. As a result, the washing areas of the washing water sprayed from the first spray hole 21 and the multiple second spray holes 31 can be superimposed to form a roughly rectangular or square washing area, which fully covers the washing area of ​​the dishwasher, thereby avoiding washing dead corners.

[0043] According to the embodiment of the present invention, the spray arm assembly 100 comprises a central gear 10, a main spray arm 20, a secondary spray arm 30, and a gear assembly 40. The main spray arm 20 is rotatably mounted on the central gear 10 about a first axis 201, the first axis 201 coinciding with the central axis of the central gear 10. A first inner cavity is defined within the main spray arm 20, and a first spray hole 21 communicating with the first inner cavity is formed on the main spray arm 20. The secondary spray arm 30 is rotatably mounted on the main spray arm 20, and the rotation axis of the secondary spray arm 30 is parallel to the first axis 201. The secondary spray arm 30 is spaced apart and defines a second inner cavity. Multiple second spray holes 31 communicating with the second inner cavity are formed on the secondary spray arm 30. The gear assembly 40 is connected between the central gear 10 and the secondary spray arm 30. The rotation speed of the secondary spray arm 30 is 1:1 to that of the main spray arm 20. The motion trajectories of the first spray hole 21 and the multiple second spray holes 31 are superimposed to define a roughly rectangular washing area. This can fully match the washing area of ​​the dishwasher, avoid washing dead corners, and thus effectively improve the washing effect and user experience.

[0044] In one embodiment of this utility model, such as Figures 1-4As shown, the spray arm assembly 100 is configured such that the movement trajectories of the first spray hole 21 and the plurality of second spray holes 31 overlap to define a roughly square washing area. In this embodiment, the spray arm assembly 100 is configured such that the movement trajectories of the first spray hole 21 and the plurality of second spray holes 31 overlap to define a roughly square washing area. This allows the washing area formed by the spray arm assembly 100 to be adapted to dishwashers with square washing areas, thereby further improving the adaptability and flexibility of the spray arm assembly 100.

[0045] In one embodiment of this utility model, such as Figures 1-3 As shown, there are two auxiliary spray arms 30, and each of the two auxiliary spray arms 30 has a second spray hole 31 at both ends in the length direction. The second spray holes 31 at both ends of the auxiliary spray arms 30 are arranged symmetrically about the rotation axis of the auxiliary spray arms 30. The two auxiliary spray arms 30 are arranged at the same end of the main spray arm 20 in the length direction, and the rotation axes of the two auxiliary spray arms 30 are collinear.

[0046] For example Figure 1 and 2 As shown, both auxiliary spray arms 30 are elongated. Two second spray holes 31 are symmetrically arranged at both ends of one auxiliary spray arm 30 about the rotation axis of the auxiliary spray arm 30. Two second spray holes 31 are also symmetrically arranged at both ends of the other auxiliary spray arm 30 about the rotation axis of the auxiliary spray arm 30. That is to say, a total of four second spray holes 31 are provided on the two auxiliary spray arms 30. The four second spray holes 31 are all located at the ends of the auxiliary spray arms 30, which can effectively expand the washing range of the auxiliary spray arms 30. Moreover, the movement trajectory of the four spray holes is four circles, and the four circles are distributed in the washing areas corresponding to the four corners of the rectangular washing area.

[0047] This embodiment sets the number of auxiliary spray arms 30 to two, and each of the two auxiliary spray arms 30 has a second spray hole 31 formed at both ends in the length direction. The second spray holes 31 at both ends of the auxiliary spray arms 30 are symmetrically arranged about the rotation axis of the auxiliary spray arms 30. This not only effectively expands the washing range of the auxiliary spray arms 30, but also makes the movement trajectory of the second spray holes distributed in the washing areas corresponding to the four corners of the rectangular washing area, thereby effectively avoiding washing dead corners at the four corners of the rectangular washing area and thus effectively enhancing the washing effect. By arranging the two auxiliary spray arms 30 at the same end of the main spray arm 20 in the length direction, and the rotation axes of the two auxiliary spray arms 30 are collinear, the arrangement of the auxiliary spray arms 30 can be effectively simplified, thereby effectively reducing the number of parts and thus effectively reducing costs.

[0048] In one embodiment of this utility model, such as Figures 1-3As shown, both auxiliary spray arms 30 extend along a straight line and are arranged at an angle; and / or, the two auxiliary spray arms 30 are integrally formed, and the plurality of second spray holes 31 of the two auxiliary spray arms 30 are arranged rotationally symmetrically about the rotation axis of the auxiliary spray arms 30.

[0049] For example, both auxiliary spray arms 30 extend along a straight line and are arranged at an angle; or, the two auxiliary spray arms 30 are integrally formed, and the plurality of second spray holes 31 of the two auxiliary spray arms 30 are arranged rotationally symmetrically about the rotation axis of the auxiliary spray arms 30; or, both auxiliary spray arms 30 extend along a straight line and are arranged at an angle, and the two auxiliary spray arms 30 are integrally formed, and the plurality of second spray holes 31 of the two auxiliary spray arms 30 are arranged rotationally symmetrically about the rotation axis of the auxiliary spray arms 30.

[0050] For example, the included angle between the two auxiliary spray arms 30 can be 40°, 50°, 60°, 70°, and 80°. When the included angle between the two auxiliary spray arms 30 is set to different values, the rectangular washing area formed by the superposition of the movement trajectories of the first spray hole 21 on the main spray arm 20 and the multiple second spray holes 31 on the auxiliary spray arm 30 can be different, thereby better covering different rectangular washing areas. In other words, the included angle between the two auxiliary spray arms 30 can be designed according to different dishwasher models, so that the washing area formed by the spray arm assembly 100 can adapt to different models of dishwashers.

[0051] It should be noted that one-piece molding can improve the mechanical strength and durability of the auxiliary spray arms 30, reducing the problem of loosening of connection parts due to improper assembly or long-term use. In addition, one-piece molding can avoid the need for additional seams or interfaces, which may become leakage points and affect the washing effect. Therefore, one-piece molding can help improve water tightness and air tightness. Thus, the one-piece molding process for the two auxiliary spray arms 30 can effectively improve the reliability and stability of the spray arm assembly 100.

[0052] In this embodiment, both auxiliary spray arms 30 extend along a straight line and are arranged at an angle. This not only simplifies the structural shape of the auxiliary spray arms 30, thereby simplifying their construction and reducing production difficulty, but also allows the movement trajectories of the multiple second spray holes 31 of the auxiliary spray arms 30 to overlap with the movement trajectories of the first spray holes 21 on the main spray arm 20 to form different rectangular washing areas. This effectively improves the adaptability and flexibility of the spray arm assembly 100. By setting the two auxiliary spray arms 30 as a single piece and arranging the multiple second spray holes 31 of the two auxiliary spray arms 30 rotationally symmetrical about the rotation axis of the auxiliary spray arms 30, the structural strength of the auxiliary spray arms 30 is effectively improved, as well as their water tightness and air tightness. This effectively improves the reliability and stability of the spray arm assembly 100, and also effectively covers the washing area of ​​the dishwasher, avoiding washing dead corners, thereby effectively ensuring the washing effect of the spray arm assembly 100.

[0053] In one embodiment of this utility model, such as Figure 2 and Figure 3 As shown, the included angle between the two auxiliary spray arms 30 is 90°. That is, the two auxiliary spray arms 30 are arranged perpendicular to each other, so that the shape of the washing area formed by the superposition of the movement trajectories of the first spray hole 21 on the main spray arm 20 and the multiple second spray holes 31 on the auxiliary spray arm 30 is square.

[0054] This embodiment sets the included angle between the two auxiliary spray arms 30 to 90°, which not only makes the washing area formed by the spray arm assembly 100 adaptable to a dishwasher with a square washing area, but also effectively simplifies the setting method of the auxiliary spray arms 30, thereby effectively reducing the assembly difficulty of the auxiliary spray arms 30 and thus effectively improving the ease of assembly of the auxiliary spray arms 30.

[0055] In one embodiment of this utility model, such as Figure 4 and Figure 5 As shown, there are two auxiliary spray arms 30, and each of the two auxiliary spray arms 30 has a second spray hole 31 formed at both ends of its length direction. The two auxiliary spray arms 30 are respectively arranged at both ends of the length direction of the main spray arm 20. The rotation axes of the two auxiliary spray arms 30 are symmetrically arranged about the first axis 201. Both auxiliary spray arms 30 extend along a straight line and are perpendicular to each other.

[0056] In this embodiment, by setting the number of auxiliary spray arms 30 to two, and forming second spray holes 31 at both ends of the length direction of the two auxiliary spray arms 30, the two auxiliary spray arms 30 are respectively arranged at both ends of the length direction of the main spray arm 20. The rotation axes of the two auxiliary spray arms 30 are symmetrically arranged about the first axis 201. The two auxiliary spray arms 30 extend along a straight line and are perpendicular to each other, which can ensure that the movement trajectories of the first spray hole 21 and the multiple second spray holes 31 are superimposed to form a square washing area, thereby effectively improving the applicability of the spray arm assembly 100.

[0057] In one embodiment of this utility model, such as Figure 4 and Figure 5 As shown, there are two auxiliary spray arms 30, namely the first spray arm 32 and the second spray arm 33. The first spray arm 32 is located at one end of the main spray arm 20 in the length direction and is rotatably connected to the main spray arm 20. The second spray arm 33 is located at the other end of the main spray arm 20 in the length direction and is rotatably connected to the main spray arm 20. The first spray arm 32 rotates about its rotation axis relative to the main spray arm 20 in the opposite direction to the rotation direction of the main spray arm 20. The second spray arm 33 rotates about its rotation axis relative to the main spray arm 20 in the opposite direction to the rotation direction of the main spray arm 20.

[0058] For example Figure 4 and Figure 5 As shown, the auxiliary spray arm 30 includes a first spray arm 32 and a second spray arm 33. The first spray arm 32 is disposed at one end of the main spray arm 20 in the length direction and is rotatably connected to the main spray arm 20. The second spray arm 33 is disposed at the other end of the main spray arm 20 in the length direction and is rotatably connected to the main spray arm 20. When the spray arm assembly 100 is working, the main spray arm 20 rotates around the first axis 201, and the first spray arm 32 revolves around the first axis 201 with the main spray arm 20. The first spray arm 32 rotates relative to the main spray arm 20 about its rotation axis. The direction of the first spray arm 32's rotation relative to the main spray arm 20 is opposite to the direction of the main spray arm 20's rotation. The rotational speed of the first spray arm 32's rotation relative to the main spray arm 20 is the same as the rotational speed of the main spray arm 20 about its rotation axis 201.

[0059] The second spray arm 33 revolves around the first axis 201 with the main spray arm 20, and the second spray arm 33 rotates relative to the main spray arm 20 about its rotation axis. The direction of the second spray arm 33's rotation relative to the main spray arm 20 is opposite to the direction of the main spray arm 20's rotation, and the rotational speed of the second spray arm 33 relative to the main spray arm 20 is the same as the rotational speed of the main spray arm 20 about the first axis 201. Therefore, the washing effect of the first spray hole 21 and the second spray hole 31 can be effectively enhanced.

[0060] For example, when the spray arm assembly 100 is operating, the main spray arm 20 rotates clockwise around the first axis 201, and the first spray arm 32 rotates clockwise with the main spray arm 20 around the first axis 201. The first spray arm 32 also rotates counterclockwise relative to the main spray arm 20 around its rotation axis, and the rotational speed of the first spray arm 32 relative to the main spray arm 20 is the same as the rotational speed of the main spray arm 20 around the first axis 201. The second spray arm 33 rotates clockwise with the main spray arm 20 around the second axis, and the second spray arm 33 rotates counterclockwise relative to the main spray arm 20 around its rotation axis, and the rotational speed of the second spray arm 33 relative to the main spray arm 20 is the same as the rotational speed of the main spray arm 20 around the first axis 201.

[0061] In this embodiment, by setting the number of auxiliary spray arms 30 to two, namely a first spray arm 32 and a second spray arm 33, the first spray arm 32 is located at one end of the main spray arm 20 in the length direction and is rotatably connected to the main spray arm 20, and the second spray arm 33 is located at the other end of the main spray arm 20 in the length direction and is rotatably connected to the main spray arm 20. The first spray arm 32 rotates about its rotation axis relative to the main spray arm 20 in the opposite direction to the rotation direction of the main spray arm 20, and the second spray arm 33 rotates about its rotation axis relative to the main spray arm 20 in the opposite direction to the rotation direction of the main spray arm 20. This can effectively improve the washing effect of the spray arm assembly 100.

[0062] In one embodiment of this utility model, such as Figure 3 and Figure 5 As shown, the gear assembly 40 includes a first gear 41 and a transmission wheel 42. The first gear 41 is coaxially fixed with the auxiliary spray arm 30, and the transmission wheel 42 is driven between the first gear 41 and the central gear 10. The central gear 10 and the first gear 41 have the same number of teeth.

[0063] In a specific example, such as Figure 3 and Figure 5 As shown, the first gear 41 is provided with a third through hole 410 that extends through the first gear 41 along its thickness direction. The lower end of the first central column of the auxiliary spray arm 30 can pass through the second through hole and extend into the third through hole 410. The periphery of the third through hole 410 can be engaged with the outer circumferential surface of the first central column of the auxiliary spray arm 30. Furthermore, the rotation axis of the auxiliary spray arm 30, the central axis of the first central column, and the central axis of the first gear 41 coincide. That is to say, the first gear 41 is coaxially fixed with the auxiliary spray arm 30, and the first gear 41 can rotate together with the auxiliary spray arm 30 around the rotation axis of the auxiliary spray arm 30.

[0064] A first fixed shaft extending in the vertical direction is provided on the lower surface of the main spray arm 20. A fourth through hole 420 is provided in the transmission gear, which passes through the transmission gear along the thickness direction of the transmission gear. Furthermore, the central axis of the first fixed shaft coincides with the central axis of the transmission gear. The upper end of the first fixed shaft is integrally formed with the lower surface of the main spray arm 20. The lower end of the first fixed shaft extends into the fourth through hole 420 of the transmission gear. That is to say, the transmission gear is rotatably sleeved on the outside of the first fixed shaft.

[0065] When the auxiliary spray arm 30 rotates under the action of water flow, it drives the first gear 41 to rotate around its rotation axis via the first central column. The first gear 41 drives the transmission gear to rotate around its central axis. Since the transmission gear meshes with the central gear 10 and the central gear 10 is fixed on the spray arm seat, the transmission gear, the first gear 41, and the auxiliary spray arm 30 all revolve around the first axis 201. At this time, the main spray arm 20 rotates around the first axis 201. Because the central gear 10 and the first gear 41 have the same number of teeth, the rotational speed of the auxiliary spray arm 30 around its rotation axis relative to the main spray arm 20 is the same as the rotational speed of the main spray arm 20 around the first axis 201. As a result, the motion trajectories of the first spray hole 21 and the multiple second spray holes 31 overlap to form a rectangular washing area, fully covering the rectangular washing area of ​​the dishwasher, thus avoiding washing dead corners.

[0066] In this embodiment, by setting a first gear 41 and a transmission wheel 42 in the gear assembly 40, the first gear 41 is coaxially fixed with the auxiliary spray arm 30, and the transmission wheel 42 is driven between the first gear 41 and the central gear 10. The central gear 10 and the first gear 41 have the same number of teeth. This not only effectively simplifies the structure of the gear assembly 40, but also ensures that the rotation speed of the auxiliary spray arm 30 is 1:1 with the rotation speed of the main spray arm 20, thereby ensuring that the washing area of ​​the spray arm assembly 100 is rectangular.

[0067] In one embodiment of this utility model, such as Figure 3 and Figure 5 As shown, the number of transmission wheels 42 connecting the first gear 41 and the central gear 10 is odd. For example, the number of transmission wheels 42 connecting the first gear 41 and the central gear 10 can be one, three, five, seven, or nine. In a specific example, such as... Figure 3 and Figure 5 As shown, there is one transmission wheel 42 connecting the first gear 41 and the central gear 10.

[0068] In this embodiment, by setting the number of transmission wheels 42 connected between the first gear 41 and the central gear 10 to an odd number, the direction of rotation of the auxiliary spray arm 30 around the rotation axis of the auxiliary spray arm 30 relative to the main spray arm 20 is opposite to the direction of rotation of the main spray arm 20 around the first axis 201. This allows the movement trajectory of the second spray hole 31 of the auxiliary spray arm 30 to effectively cover the four corner areas of the rectangular washing area, thereby effectively improving the washing effect.

[0069] The dishwasher according to a second aspect embodiment of the present invention includes a spray arm assembly 100 according to the first aspect embodiment of the present invention described above. It should be noted that the dishwasher has a washing chamber, and the spray arm assembly 100 in this application can be disposed at the bottom of the washing chamber, thereby using the spray arm assembly 100 as a bottom spray device. Alternatively, the spray arm assembly 100 in this application can be disposed in the middle of the washing chamber, thereby using the spray arm assembly 100 as a middle spray device.

[0070] According to the present invention, the dishwasher, by providing the spray arm assembly 100 of the first aspect, can fully conform to the washing area of ​​the dishwasher, avoid washing dead corners, and thus effectively improve the washing effect and the user experience.

[0071] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0072] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0073] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0074] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions 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 one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0075] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A spray arm assembly, characterized in that, include: Central gear; The main spray arm is rotatably mounted on the central gear about a first axis, the first axis being coincident with the central axis of the central gear. The main spray arm defines a first inner cavity, and a first spray hole communicating with the first inner cavity is formed on the main spray arm. A secondary spray arm is rotatably mounted on the main spray arm. The rotation axis of the secondary spray arm is parallel to and spaced apart from the first axis. A second inner cavity is defined within the secondary spray arm, and a plurality of second spray holes communicating with the second inner cavity are formed on the secondary spray arm. A gear assembly, which is driven between the central gear and the auxiliary spray arm, The rotational speed of the auxiliary spray arm is 1:1 to that of the main spray arm, and the superimposed motion trajectories of the first spray hole and the plurality of second spray holes define a roughly rectangular washing area.

2. The spray arm assembly according to claim 1, characterized in that, The spray arm assembly is configured such that the movement trajectories of the first spray hole and a plurality of second spray holes overlap to define a roughly square washing area.

3. The spray arm assembly according to claim 1, characterized in that, The number of auxiliary spray arms is two, and the second spray holes are formed at both ends of the length direction of the two auxiliary spray arms. The second spray holes at both ends of the auxiliary spray arms are arranged symmetrically about the rotation axis of the auxiliary spray arms. The two auxiliary spray arms are arranged at the same end of the main spray arm in the length direction, and the rotation axes of the two auxiliary spray arms are collinear.

4. The spray arm assembly according to claim 3, characterized in that, Both of the aforementioned auxiliary spray arms extend in a straight line and are arranged at an angle; and / or, The two auxiliary spray arms are integrally formed, and the plurality of second spray holes of the two auxiliary spray arms are arranged rotationally symmetrically about the rotation axis of the auxiliary spray arms.

5. The spray arm assembly according to claim 4, characterized in that, The included angle between the two auxiliary spray arms is 90°.

6. The spray arm assembly according to claim 1, characterized in that, The number of auxiliary spray arms is two, and the second spray hole is formed at both ends of the length direction of the two auxiliary spray arms. The two auxiliary spray arms are respectively arranged at both ends of the length direction of the main spray arm. The rotation axes of the two auxiliary spray arms are symmetrically arranged about the first axis. The two auxiliary spray arms extend along a straight line and are perpendicular to each other.

7. The spray arm assembly according to claim 1, characterized in that, The main spray arm consists of two auxiliary spray arms, designated as a first spray arm and a second spray arm. The first spray arm is located at one end of the main spray arm along its length and is rotatably connected to the main spray arm. The second spray arm is located at the other end of the main spray arm along its length and is rotatably connected to the main spray arm. Wherein, the direction in which the first spray arm rotates about its rotation axis relative to the main spray arm is opposite to the direction in which the main spray arm rotates, and the direction in which the second spray arm rotates about its rotation axis relative to the main spray arm is opposite to the direction in which the main spray arm rotates.

8. The spray arm assembly according to any one of claims 1-7, characterized in that, The gear assembly includes a first gear and a transmission wheel. The first gear is coaxially fixed with the auxiliary spray arm, and the transmission wheel is drivingly connected between the first gear and the central gear. The central gear and the first gear have the same number of teeth.

9. The spray arm assembly according to claim 8, characterized in that, The number of transmission wheels connected between the first gear and the central gear is odd.

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

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