Spraying arm assembly and dish washing machine

Abstract

The utility model discloses a spraying arm assembly and a dish washing machine. The gushing arm assembly comprises a main gushing arm, and a first water through hole is formed in the main gushing arm; a second water through hole corresponding to the first water through hole is formed in the planetary spraying arm; the first gasket is mounted on the inner side wall of the planetary gushing arm and located on the peripheral side of the second water through hole; the rotating shaft comprises a shaft body, a limiting part arranged at one end of the shaft body and a first connecting part arranged at the other end of the shaft body, the first connecting part is installed on the main spraying arm, and the shaft body is arranged in the second water through hole in a penetrating mode and is in clearance fit with the planetary spraying arm; the limiting part is located on the side, back to the first connecting part, of the first gasket.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a spray arm assembly and a dishwasher. Background Art

[0002] There are various spray arm structures of dishwashers on the market. Some spray arm assemblies are composed of multiple spray arms connected to achieve spray coverage of a larger area.

[0003] However, the solution with multiple spray arms increases the gravity of the spray arm assembly itself and water, so the spray arm assembly requires greater driving force while also reducing the friction within the spray arm assembly; on the other hand, due to overall structural limitations, for some spray arms that are not rotationally symmetrical, the friction generated by the spray arms during rotation is greater, thus putting forward higher wear resistance requirements for the connection structure to ensure the life of the spray arm assembly, resulting in a more complex connection structure and increased costs. Due to the complexity of the structure, the leakage of the spray arm assembly is also increased, which is not conducive to the rapid rotation of the spray arm.

[0004] Therefore, a spray arm assembly is urgently needed to solve the above problems. Utility Model Content

[0005] The utility model aims to solve one of the problems existing in the existing related technologies to at least a certain extent. To this end, the utility model proposes a spray arm group. By setting a first gasket, rigid friction will not occur between the planetary spray arm and the rotating shaft, thereby reducing the friction between the planetary spray arm and the rotating shaft, which is beneficial to the rotation of the planetary spray arm. At the same time, it can also reduce the wear between the planetary spray arm and the rotating shaft, and improve the life of the spray arm assembly. The utility model has a simple structure and reduces the leakage of water in the spray arm assembly.

[0006] The above purpose is achieved through the following technical solutions:

[0007] A spray arm assembly, comprising:

[0008] A main spray arm, on which a first water hole is provided;

[0009] A planetary spray arm, on which a second water hole corresponding to the first water hole is formed;

[0010] A first gasket, mounted on the inner side wall of the planetary spray arm and located around the second water hole;

[0011] The rotating shaft includes a shaft body, a limiting portion arranged at one end of the shaft body, and a first connecting portion arranged at the other end of the shaft body, wherein the first connecting portion is installed on the main spray arm, the shaft body is passed through the second water hole and is arranged to cooperate with the planetary spray arm gap, and the limiting portion is located on the side of the first gasket that is opposite to the first connecting portion.

[0012] Optionally, the planetary spray arm comprises:

[0013] a first cover plate, wherein the second water hole is provided on the first cover plate;

[0014] The second cover plate is combined with the first cover plate to form a planetary water cavity.

[0015] Optionally, a placement groove is further provided on the inner side of the first cover plate, the placement groove is located on the peripheral side of the second water hole, and the first gasket is installed in the placement groove.

[0016] Optionally, a first limiting protrusion is further provided on the inner side wall of the second cover plate, and the first limiting protrusion presses against a side surface of the first gasket which is opposite to the first connecting portion.

[0017] Optionally, the limiting portion is a flange protruding from the circumferential side of the shaft body or a plurality of second limiting protrusions arranged at intervals.

[0018] Optionally, a side wall portion extending along the axial direction of the shaft body is further provided on the inner side of the first gasket, and the side wall portion is provided with a clearance fit with the shaft body.

[0019] Optionally, a second connection portion corresponding to the first connection portion is provided on the main spray arm, the second connection portion is provided on a peripheral side of the first water through hole, and the second connection portion is connected to the first connection portion.

[0020] Optionally, a first slot is formed between the first connecting part and the shaft body, the second connecting part includes a connecting body part and a second slot arranged in the middle of the connecting body part, the opening of the second slot is opened away from the planetary spray arm, the second connecting part extends toward the axis of the first water hole and is inserted into the first slot, and the first connecting part is inserted into the second slot.

[0021] Optionally, the main spray arm comprises:

[0022] a third cover plate, wherein the first water hole is provided on the third cover plate, and the second connecting portion is provided on the third cover plate;

[0023] The fourth cover plate is combined with the third cover plate to form a main water cavity.

[0024] Optionally, it also includes a second gasket, which is arranged on a side surface of the main spray arm facing the planetary spray arm, and the second gasket is located on the circumferential side of the first water hole. An abutment portion is provided on one end of the circumferential side wall of the second water hole of the planetary spray arm facing the main spray arm, and the abutment portion abuts against the side of the second gasket facing away from the main spray arm.

[0025] Optionally, the first gasket and the second gasket are both made of polytetrafluoroethylene.

[0026] Another aspect of the utility model provides a dishwasher, comprising the spray arm assembly mentioned above.

[0027] Compared with the prior art, the utility model has at least the following beneficial effects:

[0028] The spray arm assembly provided by the utility model is provided with a first gasket so that rigid friction does not occur between the planetary spray arm and the rotating shaft, thereby reducing the friction between the planetary spray arm and the rotating shaft, which is beneficial to the rotation of the planetary spray arm. At the same time, it can also reduce the wear between the planetary spray arm and the rotating shaft, and improve the service life of the spray arm assembly. The structure is simple and the leakage of water in the spray arm assembly is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a three-dimensional structural schematic diagram of a spray arm assembly provided in a specific embodiment of the utility model;

[0030] Figure 2 yes Figure 1 Exploded diagram of

[0031] Figure 3 yes Figure 2 The enlarged view of point A in the middle;

[0032] Figure 4 It is a cross-sectional view of a spray arm assembly provided in a specific embodiment of the utility model;

[0033] Figure 5 It is a three-dimensional structural schematic diagram of a rotating shaft of a spray arm assembly provided in a specific embodiment of the utility model;

[0034] Figure 6 yes Figure 5 sectional view of

[0035] Figure 7 It is a cross-sectional view of a planetary spray arm of a spray arm assembly provided in a specific embodiment of the utility model;

[0036] Figure 8 It is an exploded view of a planetary spray arm of a spray arm assembly provided in a specific embodiment of the utility model;

[0037] Fig. 9 It is a three-dimensional structural schematic diagram of another rotating shaft of the spray arm assembly provided in a specific embodiment of the utility model;

[0038] Fig.10 yes Fig. 9 sectional view of

[0039] Fig.11It is a cross-sectional view of another first gasket of the spray arm assembly provided in a specific embodiment of the utility model.

[0040] In the figure:

[0041] 1. Main spray arm; 11. Second connection part; 111. Connection body part; 112. Inclined guide surface; 110. Second slot; 101. Third cover plate; 102. Fourth cover plate; 10. First water hole;

[0042] 2. Planetary spray arm; 20. Second water hole; 21. First cover plate; 211. Placement groove; 212. Abutment portion; 213. Hot melt protrusion column; 22. Second cover plate; 221. First limit protrusion;

[0043] 3. rotating shaft; 31. shaft body; 32. second limiting protrusion; 33. first connecting portion; 330. first slot; 34. flange;

[0044] 41. Second gasket; 42. First gasket; 421. Side wall portion. DETAILED DESCRIPTION

[0045] The following examples illustrate the present invention, but the present invention is not limited by these examples. Modifications to the specific implementation of the present invention or equivalent replacement of some technical features without departing from the spirit of the present invention should be included in the scope of the technical solution claimed for protection in the present invention.

[0046] Please refer to Figure 1-Figure 11 The utility model provides a spray arm assembly, including a main spray arm 1, a planetary spray arm 2, a first gasket 42 and a rotating shaft 3. A first water hole 10 is provided on the main spray arm 1. A second water hole 20 corresponding to the first water hole 10 is provided on the planetary spray arm 2. The first gasket 42 is installed on the inner wall of the planetary spray arm 2 and is located on the circumference of the second water hole 20. The rotating shaft 3 includes a shaft body 31, a limiting portion arranged at one end of the shaft body 31, and a first connecting portion 33 arranged at the other end of the shaft body 31. The first connecting portion 33 is installed on the main spray arm 1, the shaft body 31 is penetrated in the second water hole 20 and is arranged with a clearance fit with the planetary spray arm 2, and the limiting portion is located on the side of the first gasket 42 that is opposite to the first connecting portion 33. When the spray arm assembly is working, the planetary spray arm 2 rotates relative to the rotating shaft 3. By setting the first gasket 42, rigid friction will not occur between the planetary spray arm 2 and the rotating shaft 3, thereby reducing the friction between the planetary spray arm 2 and the rotating shaft 3, which is beneficial to the rotation of the planetary spray arm 2. At the same time, it can also reduce the wear between the planetary spray arm 2 and the rotating shaft 3, thereby increasing the life of the spray arm assembly. The structure is simple, and the leakage of water in the spray arm assembly is reduced.

[0047] Optionally, the planetary spray arm 2 includes a first cover plate 21 and a second cover plate 22. The second water hole 20 is provided on the first cover plate 21. The second cover plate 22 and the first cover plate 21 are covered to form a planetary water cavity. By setting the planetary spray arm 2 as the first cover plate 21 and the second cover plate 22, it is convenient to first install the first gasket 42 on the inner side of the first cover plate 21, and then install the second cover plate 22 on the first cover plate 21, which is convenient for installing the first gasket 42.

[0048] Optionally, a placement groove 211 is further provided on the inner side of the first cover plate 21, and the placement groove 211 is located on the peripheral side of the second water hole 20, and the first gasket 42 is installed in the placement groove 211. By providing the placement groove 211 on the inner side of the first cover plate 21, it is convenient to place the first gasket 42, and it is convenient to quickly position the first gasket 42 when installing it, thereby improving the installation efficiency.

[0049] Optionally, a first limiting protrusion 221 is further provided on the inner side wall of the second cover plate 22, and the first limiting protrusion 221 presses against a side surface of the first gasket 42 that is opposite to the first connecting portion 33. When the first cover plate 21 is connected to the second cover plate 22, the first limiting protrusion 221 can press the first gasket 42 against the first cover plate 21, thereby realizing the installation of the first gasket 42 on the first cover plate 21.

[0050] Since the first cover plate 21 and the second cover plate 22 are connected to each other by hot-melt welding, due to the error during hot-melt welding, there is also an error in the force of the limiting protrusion 32 pressing on the first gasket 42, and the installation stability of the first gasket 42 on the first cover plate 21 cannot be well guaranteed. Therefore, further, the first gasket 42 can be installed on the first cover plate 21 by secondary injection molding, or a hot-melt protrusion column 213 located on the side of the first water hole 10 can be provided on the first cover plate 21, and the first gasket 42 can be stably fixed on the first cover plate 21 by hot-melting the hot-melt protrusion column 213.

[0051] Optionally, the limiting portion is a flange 34 protruding from the circumferential side of the shaft body 31 or a plurality of second limiting protrusions 32 arranged at intervals.

[0052] Optionally, a side wall portion 421 extending along the axial direction of the shaft body 31 is further provided on the inner side of the first gasket 42, and the side wall portion 421 is provided with a clearance fit with the shaft body 31. By providing the side wall portion 421, the circumferential side surface of the shaft body 31 and the planetary spray arm 2 can also be well separated, thereby achieving a better effect of reducing friction.

[0053] Optionally, a second connection portion 11 corresponding to the first connection portion 33 is provided on the main spray arm 1 , and the second connection portion 11 is provided on the peripheral side of the first water through hole 10 , and the second connection portion 11 is connected to the first connection portion 33 .

[0054] Furthermore, a first slot 330 is formed between the first connecting portion 33 and the shaft body 31, the second connecting portion 11 includes a connecting body portion 111 and a second slot 110 arranged in the middle of the connecting body portion 111, the opening of the second slot 110 is opened facing away from the planetary spray arm 2, the second connecting portion 11 is extended toward the center of the first water hole 10 and is inserted into the first slot 330, and the first connecting portion 33 is inserted into the second slot 110, thereby realizing a detachable connection between the main spray arm 1 and the planetary spray arm 2.

[0055] Furthermore, an inclined guide surface 112 is provided on the inner side surface of one side of the second connecting portion 11, and the inclined guide surface 112 is connected to the second card slot 110, and the inclined guide surface 112 is inclined from the end away from the second card slot 110 to the end close to the second card slot 110 in a direction away from the planetary spray arm 2, so as to facilitate the first connecting portion 33 to be inserted into the second card slot 110 along the inclined guide surface 112.

[0056] Optionally, the main spray arm 1 comprises a third cover plate 101 and a fourth cover plate 102. The first water hole 10 is provided on the third cover plate 101, and the second connection portion 11 is provided on the third cover plate 101. The fourth cover plate 102 and the third cover plate 101 are enclosed to form a main water cavity.

[0057] Optionally, a second gasket 41 is further included, and the second gasket 41 is arranged on a side surface of the main spray arm 1 facing the planetary spray arm 2, and the second gasket 41 is located on the peripheral side of the first water through hole 10, and an abutment portion 212 is arranged on one end of the peripheral side wall of the second water through hole 20 of the planetary spray arm 2 facing the main spray arm 1, and the abutment portion 212 abuts against the side of the second gasket 41 away from the main spray arm 1. By arranging the second gasket 41, the planetary spray arm 2 and the main spray arm 1 are isolated, rigid friction between the planetary spray arm 2 and the main spray arm 1 is avoided, and the friction between the planetary spray arm 2 and the main spray arm 1 is reduced, which is beneficial to the rotation of the planetary spray arm 2, and can also reduce the wear of the planetary spray arm 2 and the main spray arm 1, and extend the life of the spray arm assembly.

[0058] On the whole, the abutment portion 121 is sandwiched between the first gasket 42 and the second gasket 41, and the abutment portion 121, the first gasket 42 and the second gasket 41 are all sandwiched between the limiting portion and the main spray arm 1, thereby effectively reducing the wear of the spray arm assembly during operation.

[0059] Optionally, the first gasket 42 and the second gasket 41 are both made of polytetrafluoroethylene, which has a low friction coefficient, so as to improve the rotation smoothness of the planetary spray arm 2.

[0060] Another aspect of the present invention provides a method for installing the spray arm assembly as above, comprising the following steps:

[0061] S1: Install the first gasket 42 on the inner side of the first cover plate 21 of the planetary spray arm 2;

[0062] S2: Connect the third cover plate 101 of the main spray arm 1 and the second cover plate 22 of the planetary spray arm 2 through the rotating shaft 3;

[0063] S3: Install the second cover plate 22 onto the first cover plate 21 .

[0064] Optionally, S1 includes the following steps:

[0065] Connect the first gasket 42 to the first cover plate 21 by secondary injection molding; or

[0066] A hot melt protruding column 213 is provided on the first cover plate 21 around the second water hole 20 . After the first gasket 42 is placed in place on the first cover plate 21 , the hot melt protruding column 213 is hot melted to fix the first gasket 42 on the first cover plate 21 .

[0067] Optionally, S2 includes the following steps:

[0068] The shaft body 31 is passed through the second water through hole 20 so that the limiting portion is pressed against the side of the first gasket 42 facing away from the first connecting portion 33 , and then the first connecting portion 33 is installed on the third cover plate 101 .

[0069] Optionally, S1 or after S3 further includes the following steps:

[0070] The third cover plate 101 is mounted on the fourth cover plate 102 to form the main spray arm 1 .

[0071] In another aspect, the utility model provides a dishwasher, comprising a spray arm assembly.

[0072] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A spray arm assembly, characterized in that: include: A main spray arm (1) having a first water hole (10) formed thereon; A planetary spray arm (2) having a second water through hole (20) corresponding to the first water through hole (10); A first gasket (42) is mounted on the inner side wall of the planetary spray arm (2) and is located around the second water hole (20); The rotating shaft (3) comprises a shaft body (31), a limiting portion arranged at one end of the shaft body (31), and a first connecting portion (33) arranged at the other end of the shaft body (31), wherein the first connecting portion (33) is mounted on the main spray arm (1), the shaft body (31) is passed through the second water hole (20) and is arranged to be gap-matched with the planetary spray arm (2), and the limiting portion is located on a side of the first gasket (42) that is opposite to the first connecting portion (33).

2. The spray arm assembly according to claim 1, characterized in that: The planetary spray arm (2) comprises: A first cover plate (21), wherein the second water through hole (20) is provided on the first cover plate (21); The second cover plate (22) is covered with the first cover plate (21) to form a planetary water cavity.

3. The spray arm assembly according to claim 2, characterized in that: The inner side of the first cover plate (21) is also provided with a placement groove (211), the placement groove (211) is located on the peripheral side of the second water through hole (20), and the first gasket (42) is installed in the placement groove (211).

4. The spray arm assembly according to claim 3, characterized in that: A first limiting protrusion (221) is also provided on the inner side wall of the second cover plate (22), and the first limiting protrusion (221) is pressed against a side surface of the first gasket (42) facing away from the first connecting portion (33).

5. The spray arm assembly according to any one of claims 1 to 4, characterized in that: The limiting portion is a flange (34) protruding from the circumferential side of the shaft body (31) or a plurality of second limiting protrusions (32) arranged at intervals.

6. The spray arm assembly according to any one of claims 1 to 4, characterized in that: A side wall portion (421) extending along the axial direction of the shaft body (31) is also provided on the inner side of the first gasket (42), and the side wall portion (421) is provided in a clearance fit with the shaft body (31).

7. The spray arm assembly according to any one of claims 1 to 4, characterized in that: The main spray arm (1) is provided with a second connection portion (11) corresponding to the first connection portion (33); the second connection portion (11) is provided on the peripheral side of the first water through hole (10); and the second connection portion (11) is connected to the first connection portion (33).

8. The spray arm assembly according to claim 7, characterized in that: A first slot (330) is formed between the first connecting portion (33) and the shaft body (31); the second connecting portion (11) comprises a connecting body portion (111) and a second slot (110) arranged in the middle of the connecting body portion (111); an opening of the second slot (110) is opened facing away from the planetary spray arm (2); the second connecting portion (11) is extended toward the axis of the first water through hole (10) and is inserted into the first slot (330); and the first connecting portion (33) is inserted into the second slot (110).

9. The spray arm assembly according to claim 7, characterized in that: The main spray arm (1) comprises: A third cover plate (101), wherein the first water through hole (10) is provided on the third cover plate (101), and the second connection portion (11) is provided on the third cover plate (101); The fourth cover plate (102) and the third cover plate (101) are combined to form a main water chamber.

10. The spray arm assembly according to any one of claims 1 to 4, characterized in that: The invention also comprises a second gasket (41), wherein the second gasket (41) is arranged on a side surface of the main spray arm (1) facing the planetary spray arm (2), the second gasket (41) is located on the peripheral side of the first water through hole (10), and an abutment portion (212) is arranged on one end of the peripheral side wall of the second water through hole (20) of the planetary spray arm (2) facing the main spray arm (1), and the abutment portion (212) abuts against the side surface of the second gasket (41) facing away from the main spray arm (1).

11. The spray arm assembly according to claim 10, characterized in that: The first gasket (42) and the second gasket (41) are both made of polytetrafluoroethylene.

12. A dishwasher comprising the spray arm assembly according to any one of claims 1 to 11.

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