Connecting structure of spraying arm assembly and inner water pipe assembly

Abstract

The utility model relates to the technical field of dish washing machines, in particular to a connecting structure of a spraying arm assembly and an inner water pipe assembly, and the connecting structure of the spraying arm assembly and the inner water pipe assembly comprises the inner water pipe assembly and the spraying arm assembly, the spraying arm assembly comprises a first spraying arm and a second spraying arm which are distributed up and down, the first spraying arm and the second spraying arm are arranged outside the connector in a sleeving mode, a first bearing and a second bearing are arranged on the connector, the first bearing is arranged between the first spraying arm and the second spraying arm, and the second bearing is arranged between the first spraying arm and the second spraying arm. The second bearing is arranged below the second spraying arm, the upper end of the connector is detachably connected with a limiting sleeve, the limiting sleeve is used for axially limiting the first spraying arm, connection between the spraying arm assembly and the inner water pipe assembly is simpler, the number of used bearings and parts is small, the cost is saved, and the spraying arm assembly is more convenient to use. And mounting, dismounting and later maintenance are also facilitated.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of dishwashers, in particular to a connection structure of a spray arm assembly and an inner water pipe assembly. BACKGROUND

[0002] Nowadays, more and more families begin to use dishwashers to wash kitchenware in order to reduce the household burden of people. The working principle of the dishwasher is generally to add water to the inner tank of the machine body, heat it, add washing liquid, then use the washing pump to pump the water to the water spray pipe for washing, and then use the drainage pump to drain the water after washing.

[0003] The spray arm assembly is an important part of the dishwasher. At present, the household dishwasher on the market generally has two layers of baskets in the inner tank of the dishwasher, and the upper spray arm, the middle spray arm and the lower spray arm are arranged in the inner tank. The upper spray arm, the middle spray arm and the lower spray arm are connected with the internal circulating waterway of the dishwasher through pipes, and rotate to spray water droplets under the push of water flow, so as to spray and wash the kitchenware loaded on the basket.

[0004] Patent No. 202122453014.7 discloses a double-layer spray arm assembly and a dishwasher. The second spray arm and the first spray arm are arranged in an upper and lower interval, the second spray arm is tightly connected with the lower end of the connecting block, the first spray arm is rotatably connected with the lower end of the connecting block through the first rotating shaft, the second spray arm can rotate horizontally relative to the first spray arm, which forms a double-layer spray arm effect, realizes the diversity of rotation, and further forms a spray washing effect with more direct spraying positions and more various spraying angles, thereby improving the washing efficiency. However, the connection between the double-layer spray arm assembly and the water inlet module needs more connecting bearings, and the overall connection structure is relatively complex. UTILITY MODEL CONTENT

[0005] In view of the deficiencies or problems in the prior art, the present disclosure provides a connection structure of a spray arm assembly and an inner water pipe assembly, which connects the spray arm assembly and the inner water pipe assembly together very conveniently and has a relatively simple structure.

[0006] The technical solution adopted by the present disclosure to solve the above technical problems is: a connection structure of a spray arm assembly and an inner water pipe assembly, comprising an inner water pipe assembly and a spray arm assembly, the inner water pipe assembly comprises a connecting head, the spray arm assembly comprises a first spray arm and a second spray arm arranged in an upper and lower distribution, the first spray arm and the second spray arm are respectively sleeved on the outside of the connecting head, the connecting head is provided with a first bearing and a second bearing, the first bearing is arranged between the first spray arm and the second spray arm, the second bearing is arranged below the second spray arm, the upper end of the connecting head is detachably connected with a limiting sleeve, and the limiting sleeve is used for axially limiting the first spray arm.

[0007] As a preferred implementation, the inner water pipe assembly further comprises a water feeding pipe in communication with the connecting head, the water feeding pipe is used to connect an external pipeline, the connecting head is provided with a first water feeding part and a second water feeding part, the first spray arm is arranged at the position of the first water feeding part, and the second spray arm is arranged at the position of the second water feeding part. Water in the water feeding pipe flows to the first spray arm through the first water feeding part and flows to the second spray arm through the second water feeding part, so that one water feeding pipe can feed water to the first spray arm and the second spray arm at the same time, thereby enabling the first spray arm and the second spray arm to clean dishes almost at the same time.

[0008] As a preferred implementation, the first spray arm comprises a first interface and a first water containing cavity in communication with each other, the first interface is sleeved outside the first water feeding part, and the second spray arm comprises a second interface and a second water containing cavity in communication with each other, the second interface is sleeved outside the second water feeding part.

[0009] As a preferred implementation, the first water feeding part is at least two first water feeding holes, and each first water feeding hole is located at the same height; the second water feeding part is at least two second water feeding holes, and each second water feeding hole is located at the same height. Each first water feeding hole is located at the same height, so that all the first water feeding holes are arranged opposite to the first interface, thereby enabling water in the water feeding pipe to smoothly enter the first water containing cavity through the first water feeding part; each second water feeding hole is located at the same height, so that all the second water feeding holes are arranged opposite to the second interface, thereby enabling water in the water feeding pipe to smoothly enter the second water containing cavity through the second water feeding part.

[0010] As a preferred implementation, the first spray arm comprises a first upper shell and a first lower shell, the first water containing cavity is formed by the mutual covering of the first upper shell and the first lower shell, the first upper shell is provided with a plurality of first water spraying holes, and the first lower shell is provided with two first through holes.

[0011] As a preferred implementation, the two first through holes are arranged along the length direction of the first lower shell, the two first through holes are respectively arranged at two ends of the first lower shell, and the directions of the two first through holes are opposite.

[0012] The first spray arm is used to clean dishes in a bowl basket above the first spray arm, the first water spraying holes are arranged on the first upper shell, so that water sprayed from the first water spraying holes is upwardly sprayed. The two first through holes are arranged on the first lower shell, water is respectively sprayed from the two first through holes, and the two first through holes generate forces when spraying water, the forces drive the first spray arm to rotate; the directions of the two first through holes are opposite, so that the forces generated when the two first through holes respectively spray water in two different directions can cooperate to enable the first spray arm to rotate in the clockwise direction or the counterclockwise direction more quickly.

[0013] As a preferred implementation, the second spray arm comprises a second upper shell and a second lower shell, the second water cavity is formed by the mutual covering of the second upper shell and the second lower shell, the second lower shell is provided with a plurality of second water spray holes, and the second upper shell is provided with two second through holes.

[0014] As a preferred implementation, the two second through holes are arranged along the length direction of the second upper shell, and the two second through holes are respectively arranged at the two ends of the second upper shell, and the directions of the two second through holes are opposite.

[0015] The second spray arm is used for cleaning tableware in a basket below the second spray arm, the second water spray holes are arranged on the second lower shell so that water sprayed from the second water spray holes is downwardly sprayed, the two second through holes are arranged on the second upper shell, water is respectively sprayed from the two second through holes, and the two second through holes generate forces when spraying water, the forces push the second spray arm to rotate, and the directions of the two second through holes are opposite, so that the forces generated when the two second through holes respectively spray water in two different directions can be matched to make the second spray arm rotate in the clockwise or counterclockwise direction more quickly.

[0016] As a preferred implementation, the limiting sleeve comprises a cover plate, the cover plate extends in the direction of the spray arm assembly and is provided with a ring-shaped first connecting portion and a plug, the ring-shaped first connecting portion is arranged around the plug, the connecting head is provided with a second connecting portion, and the first connecting portion is used for being connected with the second connecting portion.

[0017] In some implementations, the first connecting portion is provided with a first clamping piece, the second connecting portion is a second clamping piece, and the first clamping piece and the second clamping piece are matched to connect the limiting sleeve and the connecting head.

[0018] In some implementations, an inner thread is arranged on the inner circumferential wall of the first connecting portion, the second connecting portion is an outer thread, and the inner thread is screwed with the outer thread to connect the limiting sleeve and the connecting head.

[0019] As a preferred implementation, the cover plate extends in the direction of the spray arm assembly and is provided with a first ring-shaped protrusion, a first gap is arranged between the first ring-shaped protrusion and the first connecting portion, a plurality of reinforcing ribs are arranged in the first gap, and an outer circumferential wall of the first ring-shaped protrusion is provided with a structure for enhancing friction.

[0020] The first gap saves material. Without the first gap, the first annular protrusion and the first connecting part are an integral whole, and the wall thickness is thicker, which not only increases the weight of the limiting sleeve as a whole, but also causes the cost of material to increase. The reinforcing rib in the first gap connects the first annular protrusion and the first connecting part together, which can effectively strengthen the structural strength of the limiting sleeve. The structure for enhancing friction is arranged on the outer peripheral wall of the first annular protrusion, so as to improve the friction between the hand and the limiting sleeve, and facilitate the installation or disassembly of the limiting sleeve.

[0021] Compared with the prior art, since the upper end of the connecting head is detachably connected with the limiting sleeve for axially limiting the first spray arm, the first spray arm can be prevented from moving upward or downward when rotating, so that the first spray arm and the second spray arm are more stable when working. Since the first bearing is arranged between the first spray arm and the second spray arm, the second bearing is arranged below the second spray arm, the first spray arm is located between the limiting sleeve and the first bearing, and the first spray arm rotates on the first bearing when working. The second spray arm is located between the first bearing and the second bearing, and the second spray arm rotates on the second bearing when working. In this way, the first spray arm and the second spray arm are more smooth and smooth when rotating. The connection between the spray arm assembly and the inner water pipe assembly in the application is simpler, and fewer bearings and parts are used, which not only saves cost, but also facilitates installation and disassembly and later maintenance. BRIEF DESCRIPTION OF DRAWINGS

[0022] The application will be described in further detail below in conjunction with the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments and therefore should not be considered as limiting the scope of the application. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described objects and can include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0023] Figure 1 is one of the structure schematic diagrams of the connection structure of the spray arm assembly and the inner water pipe assembly of the present disclosure;

[0024] Figure 2 is the second structure schematic diagram of the connection structure of the spray arm assembly and the inner water pipe assembly of the present disclosure;

[0025] Figure 3 is the structure schematic diagram of the inner water pipe assembly of the present disclosure Figure 2 is a local enlarged view of A in the present disclosure;

[0026] Figure 4 is the structure schematic diagram of the inner water pipe assembly of the present disclosure;

[0027] Figure 5Fig. 3 is a structural schematic diagram of a connection structure of a spray arm assembly and an inner water pipe assembly according to the present disclosure;

[0028] Figure 6 Fig. 4 is a sectional view of a connection structure of a spray arm assembly and an inner water pipe assembly according to the present disclosure;

[0029] Figure 7 Fig. 5 is a structural schematic diagram of a limiting sleeve according to the present disclosure;

[0030] Figure 8 Fig. 6 is another structural schematic diagram of a limiting sleeve according to the present disclosure.

[0031] Legend of reference signs:

[0032] 1, first spray arm; 11, first upper shell; 111, first water spraying hole; 12, first lower shell; 121, first through hole; 2, second spray arm; 21, second upper shell; 211, second through hole; 22, second lower shell; 221, second water spraying hole; 3, limiting sleeve; 31, cover plate; 32, first connecting part; 33, plug; 34, first annular protrusion; 35, first gap; 36, reinforcing rib; 4, water delivery pipeline; 41, first positioning buckle; 42, arc-shaped rib; 5, connecting head; 51, second positioning buckle; 52, annular plate; 521, rib structure; 53, first water delivery hole; 54, second water delivery hole; 55, second connecting part; 6, first bearing; 7, second bearing. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the present disclosure and do not limit the present disclosure.

[0034] Those skilled in the art should understand that in the disclosure of the present utility model, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like are based on the orientations or positional relationships shown in the drawings, which are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the above terms cannot be understood as limiting the present utility model.

[0035] Please refer to Figure 1 and Figure 5As shown, the present disclosure provides a connection structure of a spray arm assembly and an inner water pipe assembly, which comprises an inner water pipe assembly and a spray arm assembly. The inner water pipe assembly comprises a connecting head 5, and the spray arm assembly comprises a first spray arm 1 and a second spray arm 2 arranged in an up-down manner. The first spray arm 1 and the second spray arm 2 are respectively sleeved on the outside of the connecting head 5. The connecting head 5 is provided with a first bearing 6 and a second bearing 7. The first bearing 6 is arranged between the first spray arm 1 and the second spray arm 2, and the second bearing 7 is arranged below the second spray arm 2. The upper end of the connecting head 5 is detachably connected with a limiting sleeve 3. The limiting sleeve 3 is used for axially limiting the first spray arm 1, so as to prevent the first spray arm 1 from moving upward or downward when rotating, thereby making the first spray arm 1 and the second spray arm 2 more stable when working. In addition, since the first bearing 6 is arranged between the first spray arm 1 and the second spray arm 2, and the second bearing 7 is arranged below the second spray arm 2, the first spray arm 1 is located between the limiting sleeve 3 and the first bearing 6. When the first spray arm 1 works, the first spray arm 1 rotates on the first bearing 6. The second spray arm 2 is located between the first bearing 6 and the second bearing 7. When the second spray arm 2 works, it rotates on the second bearing 7. In this way, the first spray arm 1 and the second spray arm 2 rotate more smoothly and smoothly. In the present application, the connection of the spray arm assembly and the inner water pipe assembly is simpler, and fewer bearings and parts are used. Not only the cost is saved, but also fast assembly and disassembly can be realized, and the later maintenance is facilitated.

[0036] Further, the inner water pipe assembly further comprises a water feeding pipeline 4 in communication with the connecting head 5. The water feeding pipeline 4 is arranged substantially perpendicularly to the connecting head 5. The water feeding pipeline 4 is used for connecting an external pipeline. The water of the external pipeline enters the connecting head 5 through the water feeding pipeline 4, and then enters the first spray arm 1 and the second spray arm 2. The connecting head 5 is provided with a first water feeding part and a second water feeding part. The first spray arm 1 is arranged at the position of the first water feeding part, and the second spray arm 2 is arranged at the position of the second water feeding part. The water of the water feeding pipeline 4 flows to the first spray arm 1 through the first water feeding part, and flows to the second spray arm 2 through the second water feeding part. In this way, one water feeding pipeline 4 can simultaneously feed water to the first spray arm 1 and the second spray arm 2, so that the first spray arm 1 and the second spray arm 2 can almost simultaneously clean tableware.

[0037] Please see Figure 4 and Figure 6 Further, the first spray arm 1 comprises a first interface and a first water containing cavity in communication with each other. The first interface is sleeved on the outside of the first water feeding part. The second spray arm 2 comprises a second interface and a second water containing cavity in communication with each other. The second interface is sleeved on the outside of the second water feeding part. In this way, the water in the water feeding pipeline 4 can smoothly and quickly enter the first water containing cavity and the second water containing cavity.

[0038] Furthermore, the first water supply portion comprises at least two first water supply holes 53, each located at the same height; and the second water supply portion comprises at least two second water supply holes 54, each located at the same height. Each first water supply hole 53 is located at the same height, so that all first water supply holes 53 are directly opposite the first interface, thereby allowing water from the water supply pipe 4 to smoothly enter the first water storage chamber from the first water supply portion; each second water supply hole 54 is located at the same height, so that all second water supply holes 54 are directly opposite the second interface, thereby allowing water from the water supply pipe 4 to smoothly enter the second water storage chamber from the second water supply portion. After the water from the water supply pipe 4 enters the connector 5, the water first passes through the second water supply hole 54 located below. Part of the water enters the second water holding chamber from the second water supply hole 54, and part of the water continues upward through the first water supply hole 53 and enters the first water holding chamber from the first water supply hole 53. Since the height difference between the first water supply hole 53 and the second water supply hole 54 is small, the water flowing through the first water supply hole 53 can quickly enter the first water holding chamber. Therefore, it can be considered that the first water holding chamber and the second water holding chamber are filled with water and sprayed with water almost at the same time to wash the tableware.

[0039] like Figures 1-3 As shown, in one embodiment of the present disclosure, the water supply pipe 4 is provided with a plurality of arc-shaped ribs 42 at intervals along its length direction to strengthen its structural strength. A first positioning buckle 41 is provided on the end of the water supply pipe 4 away from the connector 5, and a second positioning buckle 51 is provided on the side of the connector 5 away from the water supply pipe 4. The first positioning buckle 41 and the second positioning buckle 51 are used to connect the bowl basket located below the water supply pipe 4. An annular plate 52 is provided on the end of the connector 5 close to the water supply pipe 4. The annular plate 52 is sleeved on the outside of the connector 5 and is integrally formed with the connector 5. The second bearing 7 is located on the annular plate 52, and the annular plate 52 plays a supporting role. Specifically, the second bearing 7, the second spray arm 2, the first bearing 6, the first spray arm 1 and the limit sleeve 3 are provided above the annular plate 52 from bottom to top. The weight of the second bearing 7, second spray arm 2, first bearing 6, and first spray arm 1, as well as the weight of the water within the first and second spray arms 1 and 2, bears substantially all upon the annular plate 52. To enhance the load-bearing capacity of the annular plate 52, a rib structure 521 is provided on its lower surface to increase its structural strength. To further enhance the structural strength of the annular plate 52, the annular plate 52 is located on the side of the water supply pipe 4 where it contacts the water supply pipe 4. The end of at least one arcuate rib 42 on the water supply pipe 4 contacts the lower surface of the annular plate 52.

[0040] like Figure 2 and Figure 5As shown, in an embodiment of the present disclosure, the first spray arm 1 comprises a first upper shell 11 and a first lower shell 12, and a first water storage cavity is formed by the first upper shell 11 and the first lower shell 12. The first upper shell 11 is provided with a plurality of first water spray holes 111, and water in the first water storage cavity is sprayed out of the first water spray holes 111 to clean the tableware. The first lower shell 12 is provided with two first through holes 121. Specifically, the two first through holes 121 are arranged along the length direction of the first lower shell 12, and the two first through holes 121 are respectively arranged at the two ends of the first lower shell 12, and the directions of the two first through holes 121 are opposite. The first spray arm 1 is used to clean the tableware in the bowl basket above the first spray arm 1, and the first water spray holes 111 are arranged on the first upper shell 11 so that the water sprayed out of the first water spray holes 111 sprays upward. The two first through holes 121 are arranged on the first lower shell 12, and water is respectively sprayed out of the two first through holes 121. When the two first through holes 121 spray water, an acting force is generated, which pushes the first spray arm 1 to rotate. The directions of the two first through holes 121 are opposite, so that when the two first through holes 121 respectively spray water in two different directions, the acting forces generated by the two first through holes 121 can cooperate to make the first spray arm 1 rotate more quickly in the clockwise or counterclockwise direction. Preferably, the directions of the first water spray holes 111 are different from each other, so as to expand the cleaning range as much as possible. In addition, the water sprayed out of the two first through holes 121 can also clean the tableware below the first spray arm 1.

[0041] Further, the second spray arm 2 comprises a second upper shell 21 and a second lower shell 22, and a second water storage cavity is formed by the second upper shell 21 and the second lower shell 22. The second lower shell 22 is provided with a plurality of second water spray holes 221, and the second upper shell 21 is provided with two second through holes 211. The two second through holes 211 are arranged along the length direction of the second upper shell 21, and the two second through holes 211 are respectively arranged at the two ends of the second upper shell 21, and the directions of the two second through holes 211 are opposite. The second spray arm 2 is used to clean the tableware in the bowl basket below the second spray arm 2, and the second water spray holes 221 are arranged on the second lower shell 22 so that the water sprayed out of the second water spray holes 221 sprays downward. The two second through holes 211 are arranged on the second upper shell 21, and water is respectively sprayed out of the two second through holes 211. When the two second through holes 211 spray water, an acting force is generated, which pushes the second spray arm 2 to rotate. The directions of the two second through holes 211 are opposite, so that when the two second through holes 211 respectively spray water in two different directions, the acting forces generated by the two second through holes 211 can cooperate to make the second spray arm 2 rotate more quickly in the clockwise or counterclockwise direction. Preferably, the directions of the second water spray holes 221 are different from each other, so as to expand the cleaning range as much as possible. In addition, the water sprayed out of the two second through holes 211 can also clean the tableware above the second spray arm 2.

[0042] As shown in Figures 6-8 The limiting sleeve 3 includes a cover plate 31, the cover plate 31 extends in the direction of the spray arm assembly and has a ring-shaped first connecting portion 32 and a plug 33, the ring-shaped first connecting portion 32 is arranged around the plug 33, the connecting head 5 is provided with a second connecting portion 55, and the first connecting portion 32 is used to connect with the second connecting portion 55. The plug 33 is arranged opposite to the opening of the connecting head 5, and after the limiting sleeve 3 is connected with the connecting head 5, the plug 33 is mostly or entirely located inside the connecting head 5. It can be understood that the height of the plug 33 should not be too high, otherwise the first water feeding hole 53 will be blocked. The water in the water feeding pipeline 4 enters the connecting head 5, most of the water enters the first water storage cavity and the second water storage cavity through the first water feeding portion and the second water feeding portion respectively, and a small part of the water will continue to flow upward under the action of inertia and impact the plug 33, and then fall downward under the action of the plug 33 and gravity. The plug 33 is arranged to buffer the impact of water, and can avoid the water directly impacting the cover plate 31, thereby avoiding the long-term impact of the cover plate 31 causing the limiting sleeve 3 to loosen.

[0043] In some embodiments, the first connecting portion 32 is provided with a first clamping piece, the first connecting portion 32 is a second clamping piece, and the first clamping piece and the second clamping piece are matched to connect the limiting sleeve 3 and the connecting head 5. In this embodiment, the limiting sleeve 3 and the connecting head 5 are connected through the clamping of the first clamping piece and the second clamping piece, which can realize the quick installation and disassembly of the limiting sleeve 3 and the connecting head 5.

[0044] In some embodiments, the inner circumferential wall of the first connecting portion 32 is provided with an internal thread, the second connecting portion 55 is an external thread, and the internal thread and the external thread are screwed to connect the limiting sleeve 3 and the connecting head 5. In this embodiment, the limiting sleeve 3 and the connecting head 5 are connected through the threaded connection, which is convenient to disassemble and reliable in connection.

[0045] In an embodiment of the present disclosure, the cover plate 31 extends in the direction of the spray arm assembly and has a first ring-shaped protrusion 34, the first ring-shaped protrusion 34 is arranged outside the first connecting portion 32, a first gap 35 is arranged between the first ring-shaped protrusion 34 and the first connecting portion 32, a plurality of reinforcing ribs 36 are arranged in the first gap 35, and the outer circumferential wall of the first ring-shaped protrusion 34 is provided with a structure for enhancing friction.

[0046] The first gap 35 saves material. Without the first gap 35, the first annular protrusion 34 and the first connecting portion 32 are an integral whole, and the wall thickness is thick, which not only increases the weight of the limiting sleeve 3 as a whole, but also causes the material cost to increase. The reinforcing rib 36 is arranged in the first gap 35, the reinforcing rib 36 connects the first annular protrusion 34 and the first connecting portion 32 together, and can effectively strengthen the structural strength of the limiting sleeve 3. The structure for enhancing friction is arranged on the outer peripheral wall of the first annular protrusion 34, in order to improve the friction between the hand and the limiting sleeve 3, and facilitate the installation or disassembly of the limiting sleeve 3.

[0047] The above has carried out the detailed introduction to the application, the principle and the implementation mode of the application are set forth by applying the specific example in this paper, the above example is only used for helping understanding the application and the core thought. It should be pointed out that, for ordinary skilled person in the art, on the premise of not departing from the principle of the application, the application can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the claims of the application.

Claims

1. A connection structure of a spray arm assembly and an inner water pipe assembly, characterized by, The inner water pipe assembly comprises a connecting head (5), and the spray arm assembly comprises a first spray arm (1) and a second spray arm (2) arranged in an up-down manner, the first spray arm (1) and the second spray arm (2) are sleeved on the outside of the connecting head (5) respectively, the connecting head (5) is provided with a first bearing (6) and a second bearing (7), the first bearing (6) is arranged between the first spray arm (1) and the second spray arm (2), the second bearing (7) is arranged below the second spray arm (2), the upper end of the connecting head (5) is detachably connected with a limiting sleeve (3), and the limiting sleeve (3) is used for axially limiting the first spray arm (1).

2. The connection structure of the spray arm assembly and the inner water pipe assembly according to claim 1, characterized in that, The inner water pipe assembly further comprises a water feeding pipeline (4) in communication with the connecting head (5), the water feeding pipeline (4) is used for connecting an external pipeline, the connecting head (5) is provided with a first water feeding part and a second water feeding part, the first spray arm (1) is arranged at the position of the first water feeding part, and the second spray arm (2) is arranged at the position of the second water feeding part.

3. The connection structure of the spray arm assembly and the inner water pipe assembly according to claim 2, characterized in that, The first spray arm (1) comprises a first interface and a first water containing cavity in communication with each other, the first interface is sleeved on the outside of the first water feeding part, and the second spray arm (2) comprises a second interface and a second water containing cavity in communication with each other, the second interface is sleeved on the outside of the second water feeding part.

4. The connection structure of the spray arm assembly and the inner water pipe assembly according to claim 2, characterized in that, The first water feeding part is at least two first water feeding holes (53), and each first water feeding hole (53) is located at the same height; and the second water feeding part is at least two second water feeding holes (54), and each second water feeding hole (54) is located at the same height.

5. The connection structure of the spray arm assembly and the inner water pipe assembly according to claim 3, wherein The first spray arm (1) comprises a first upper shell (11) and a first lower shell (12), the first water containing cavity is formed by the first upper shell (11) and the first lower shell (12) covering each other, a plurality of first water spraying holes (111) are arranged on the first upper shell (11), and two first through holes (121) are arranged on the first lower shell (12).

6. The connection structure of the spray arm assembly and the inner water pipe assembly according to claim 5, wherein The two first through holes (121) are arranged along the length direction of the first lower shell (12), and the two first through holes (121) are arranged at two ends of the first lower shell (12) respectively, and the directions of the two first through holes (121) are opposite.

7. The connection structure of the spray arm assembly and the inner water pipe assembly according to claim 3, wherein The second spray arm (2) comprises a second upper shell (21) and a second lower shell (22), the second water containing cavity is formed by the second upper shell (21) and the second lower shell (22) covering each other, a plurality of second water spraying holes (221) are arranged on the second lower shell (22), and two second through holes (211) are arranged on the second upper shell (21).

8. The connection structure of the spray arm assembly and the inner water pipe assembly according to claim 7, characterized in that, The two second through holes (211) are arranged along the length direction of the second upper shell (21), and the two second through holes (211) are arranged at two ends of the second upper shell (21) respectively, and the directions of the two second through holes (211) are opposite.

9. The connection structure of the spray arm assembly and the inner water pipe assembly according to claim 1, wherein The limiting sleeve (3) comprises a cover plate (31) extending in the direction of the spray arm assembly and having a ring-shaped first connecting portion (32) and a plug (33), the ring-shaped first connecting portion (32) being arranged around the plug (33), and the connecting head (5) being provided with a second connecting portion (55), the first connecting portion (32) being used to connect with the second connecting portion (55).

10. The connection structure of the spray arm assembly and the inner water pipe assembly according to claim 9, wherein The cover plate (31) extends in the direction of the spray arm assembly and has a first ring-shaped protrusion (34), a first gap (35) being arranged between the first ring-shaped protrusion (34) and the first connecting portion (32), a plurality of reinforcing ribs (36) being arranged in the first gap (35), and the outer peripheral wall of the first ring-shaped protrusion (34) being provided with a structure for enhancing friction.

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