CN218684247U - Spray arm and dish washer - Google Patents

Abstract

The application discloses spray arm and dish washer. The spray arm comprises a main spray arm, an auxiliary spray arm and a rotating shaft; the main spray arm is rotatably arranged on the rotating shaft, the auxiliary spray arm is connected with the rotating shaft and is rotatably arranged on the main spray arm through the rotating shaft so as to receive fluid from the main spray arm, and the rotating shaft is made of metal. This application technical scheme makes vice spray arm and main spray arm rotation be connected through setting up of metal pivot, and the diameter of pivot is dwindled to the at utmost in the setting of metal pivot under the prerequisite of guaranteeing structural strength to can reduce the circumference of the runner cross-section of main spray arm and vice spray arm junction, thereby can reduce fluidic leakage quantity.

Description

Spray arm and dish washer

Technical Field

The application relates to the technical field of sound insulation and noise reduction, in particular to a sound insulation coating structure and a sound insulation wallboard.

Background

In some dish washing machines, the spray arm comprises a main spray arm and an auxiliary spray arm, and the auxiliary spray arm is connected to the main spray arm in a clamping mode, so that the washing effect is improved.

SUMMERY OF THE UTILITY MODEL

The application aims to solve the technical problems in the related art at least to some extent. To this end, the present application proposes a spray arm which can reduce the amount of fluid leakage to some extent.

To achieve the above object, the present application discloses a spray arm comprising

A main spray arm;

an auxiliary spray arm; and

the pivot, the pivot is rotatable to be located main spray arm, vice spray arm with the pivot is connected in order to pass through the pivot is rotatable to be located main spray arm is in order to receive and come from the fluid of main spray arm, the material of pivot is the metal.

In some embodiments of the present application, the rotating shaft is connected with the auxiliary spray arm by injection molding.

In some embodiments of the present application, an end of the rotation shaft is connected to the sub spray arm;

the tip of pivot is equipped with along the recess of the circumference extension of pivot, and/or the tip of pivot is equipped with along the axial extension's of pivot slot.

In some embodiments of this application, vice spray arm includes vice spray arm upper segment and vice spray arm lower segment, vice spray arm upper segment with vice spray arm lower segment is connected and is formed the first chamber that holds, vice spray arm lower segment be equipped with the first water inlet that holds the chamber intercommunication, the pivot with vice spray arm lower segment is connected and is stretched out the water inlet, so that vice spray arm passes through vice spray arm lower segment is rotatable to be located main spray arm.

In some embodiments of the present application, the lower piece of the auxiliary spray arm is provided with at least two connecting rods and a connecting platform, the connecting rods are arranged alternately along the circumferential direction of the water inlet, the connecting platform is fixed between the connecting rods, and the rotating shaft is connected with the connecting platform.

In some embodiments of the present application, the connecting rods extend from the lower piece of the auxiliary spray arm toward the upper piece of the auxiliary spray arm, and the connecting rods are close to each other.

In some embodiments of this application, main spray arm is equipped with the second and holds the chamber, main spray arm be close to one side of vice spray arm be equipped with the second holds the delivery port that the chamber communicates, the pivot certainly vice spray arm wears to establish the delivery port with main spray arm is close to one side rotatable coupling of vice spray arm.

In some embodiments of the present application, the main nozzle arm includes a main nozzle arm upper piece and a main nozzle arm lower piece, the main nozzle arm upper piece and the main nozzle arm lower piece are connected to form the second accommodating cavity, the water outlet is provided on the main nozzle arm upper piece, and the auxiliary nozzle arm is rotatably provided on the main nozzle arm upper piece;

the main spray arm upper piece is equipped with axle sleeve and dead lever, the dead lever is two at least and follows the circumference of delivery port is alternate sets up, the axle sleeve is fixed in between each dead lever, the pivot is rotatable wear to establish the axle sleeve.

In some embodiments of the present application, the fixing rods extend from the main nozzle arm upper piece toward the main nozzle arm lower piece, and the fixing rods are close to each other.

In some embodiments of the present application, a first boss surrounding the water inlet is disposed on a side of the auxiliary spray arm close to the main spray arm, a second boss surrounding the water outlet is disposed on a side of the main spray arm close to the auxiliary spray arm, and the first boss is disposed inside the second boss;

the outside of first boss is equipped with along the protruding muscle of the circumference extension of first boss, and/or the inboard of second boss is equipped with along the vertical groove of the axial extension of second boss.

In some embodiments of the present application, the main spray arm has a first side and a second side opposite to each other, the auxiliary spray arm is disposed near the first side, the rotating shaft penetrates through the first side and the second side, so that an end of the rotating shaft is exposed to the second side, and the end of the rotating shaft is constrained by a fixing member.

In some embodiments of the present application, a first end of the rotating shaft is connected to the auxiliary spray arm, and a second end of the rotating shaft is exposed to the second side;

the spray arm is characterized in that the spray arm further comprises a spray arm seat, the main spray arm is rotatably arranged on the spray arm seat, the spray arm seat is provided with a first gear, and a second end of the rotating shaft is provided with a second gear meshed with the first gear.

In some embodiments of the present application, a cross-section of the second end of the shaft in a radial direction of the shaft is non-circular.

This application technical scheme makes vice spray arm and main spray arm rotation be connected through setting up of metal pivot, and the diameter of pivot is reduced to the maximize under the prerequisite of guaranteeing structural strength to the setting of metal pivot to can reduce the circumference of the runner cross-section of main spray arm and vice spray arm junction, thereby can reduce fluidic leakage quantity.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic diagram of a spray arm configuration according to some embodiments;

FIG. 2 is an exploded view of a spray arm according to some embodiments;

FIG. 3 is an enlarged view of FIG. 2 shown in phantom;

FIG. 4 is an exploded view of a spray arm according to some embodiments;

FIG. 5 is an enlarged view of FIG. 4 shown in phantom;

FIG. 6 is a top view of a spray arm according to some embodiments;

FIG. 7 isbase:Sub>A sectional view taken along line A-A of FIG. 6;

FIG. 8 is an enlarged view of FIG. 7 shown in phantom;

FIG. 9 is a schematic view of a spindle configuration according to some embodiments;

FIG. 10 is a schematic view of a hinge structure according to some embodiments.

The reference numbers illustrate:

the main spray arm comprises a main spray arm 100, a main spray arm upper piece 110, a water outlet 111, a shaft sleeve 112, a fixing rod 113, a second boss 114, a vertical groove 115 and a main spray arm lower piece 120;

the spray nozzle comprises an auxiliary spray arm 200, an auxiliary spray arm upper sheet 210, an auxiliary spray arm lower sheet 220, a water inlet 221, a connecting table 222, a connecting rod 223, a first boss 224 and a convex rib 225;

the gear comprises a rotating shaft 300, a groove 310, a groove 320, a transverse groove 330, a second gear 340 and a fixing piece 350;

spray arm base 400, first gear 410, main shaft 420.

The implementation, functional features and advantages of the objectives of the present application will be further explained with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present application will be described clearly and completely with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

It should be noted that all directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present application are only used to explain the relative positional relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In this application, unless expressly stated or limited otherwise, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.

In addition, descriptions in this application as to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit to the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.

The spray arm is a structure for spraying water, and the spray arm will be described in the present application by taking a dishwasher as an example.

The dish washing machine is a device capable of automatically cleaning tableware, generally speaking, the dish washing machine comprises a base, an inner container and a door body, the inner container is installed on the base, the inner container is provided with a washing cavity, the door body is rotatably connected with the inner container/the base to seal or open the washing cavity, a bowl basket capable of being pulled out or pushed in is arranged in the washing cavity, the tableware is placed in the bowl basket, spraying arms are arranged in the washing cavity, some large dish washing machines can be divided into the upper spraying arms and the lower spraying arms, the spraying arms are communicated with a washing pump in the base through a water path, and the washing pump is further communicated with the washing cavity. At the dish washer during operation, the part of controlling intaking is intake toward the washing chamber, stops intaking when treating that the water level reaches predetermineeing the water level, and the spray arm is carried in the water pumping of washing intracavity to the washing pump work, is provided with the nozzle on the spray arm, and rivers jets out from the spray arm under the effect of pressure, owing to the back drive power who jets out from the spray arm, impels the spray arm rotation again, so with rivers jet to the tableware on rinse. The water flow sprayed by the spray arm falls back to the washing cavity, and the water flow is filtered by the filter screen and continues to circulate under the action of the washing pump until the washing is finished, and the water is discharged by the drainage pump.

Because the spray arm rotation is circular motion, in order to make the spray arm spray scope bigger, avoid the existence at dead angle and lead to the problem of clean not in place, can design into the form of satellite spray arm with the spray arm among the relevant technique, still be provided with vice spray arm on main spray arm promptly, washing pump drive rivers input main spray arm, can be provided with the nozzle on the main spray arm, also can not set up the nozzle, the rivers that flow into main spray arm are input vice spray arm through the rotation connection department between main spray arm and vice spray arm between the two, thereby spout on the nozzle of vice spray arm. In order to clean tableware, water flow sprayed from the spray nozzle has certain pressure, and because the auxiliary spray arm needs to be rotatably connected with the main spray arm, pressure relief is easy to occur at the rotating connection position of the auxiliary spray arm and the main spray arm, so that water flow leakage is caused, and the water pressure in the auxiliary spray arm is reduced. In order to solve the problem of water leakage at the rotating connection part of the main spray arm and the auxiliary spray arm, the application provides an improvement.

Referring specifically to fig. 1, 2, 4 and 6, in some embodiments of the present application, the spray arm includes a main spray arm 100, an auxiliary spray arm 200 and a rotation shaft 300. Generally, a spray arm base 400 is provided on a bottom plate of the inner tub, the spray arm base 400 is connected to a washing pump through a water path, and the washing pump sucks water in the washing chamber and transfers the water to the spray arm base 400. The main spray arm 100 and the spray arm base 400 are rotatably connected, a nozzle may or may not be provided on the main spray arm 100, when a nozzle is provided on the main spray arm 100, the nozzle of the main spray arm 100 may provide water flow for injection, and when the nozzle of the main spray arm 100 is set to a certain angle, the injected water flow may also provide power for the rotation of the main spray arm 100. The auxiliary spray arm 200 is connected with the rotating shaft 300, and the auxiliary spray arm 200 is rotatably arranged relative to the main spray arm 100 through the rotating shaft 300, that is, the rotating shaft 300 needs to be rotatably matched with the main spray arm 100. When the washing pump drives the water flow to be inputted into the main spray arm 100 through the spray arm base 400, the water flow is inputted into the sub spray arm 200 continuously through the rotation connection between the main spray arm 100 and the sub spray arm 200, and is ejected from the nozzle of the sub spray arm 200.

In the present application, the material of the rotating shaft 300 is metal, such as stainless steel, and the structural strength is high, so that on the premise of ensuring the rotational connection between the auxiliary spray arm 200 and the main spray arm 100, the diameter of the rotating shaft 300 can be reduced to the maximum extent compared with the plastic material, and accordingly, the size of the flow passage cross section at the rotational connection between the main spray arm 100 and the auxiliary spray arm 200 can be designed to be reduced. In this way, the perimeter of the cross section of the flow channel at the rotational connection between the main spray arm 100 and the sub spray arm 200 is also reduced, i.e., the space where water (fluid) can leak is reduced, so that the leakage amount of water can be effectively reduced, the water pressure in the sub spray arm 200 can be ensured, and the water ejected from the sub spray arm 200 can effectively wash out tableware.

In addition, the size of the flow passage section at the rotary connection part of the main spray arm 100 and the auxiliary spray arm 200 can be made smaller, when slag is blocked (the washing pump realizes the washing of tableware through circulating water flow, although the washing pump filters through a filter screen, residues possibly exist in the water flow), the force arm of corresponding resistance is also shorter, and the auxiliary spray arm 200 is not easy to stall.

Further, in order to prevent the connection between the rotary shaft 300 and the auxiliary spray arm 200 from becoming loose, the effective rotation of the auxiliary spray arm 200 is ensured, and the auxiliary spray arm 200 is prevented from being separated from the main spray arm 100. Referring to fig. 8, in some embodiments of the present application, the sub-nozzle arm 200 and the rotary shaft 300 are injection-molded, that is, the rotary shaft 300 and the sub-nozzle arm 200 are connected by injection-molding and embedding. For example, the metal rotating shaft 300 is fixed in a proper position in a mold in advance, then plastic is injected to mold the auxiliary spraying arm 200, and after the mold is opened, the metal rotating shaft 300 is tightly wrapped in the auxiliary spraying arm 200 by the cooled and solidified plastic, so that the fixing effect of the rotating shaft 300 and the auxiliary spraying arm 200 can be effectively enhanced, and the rotating shaft 300 is not easy to loosen in the rotating process.

Further, referring to fig. 8, 9 and 10, the sub spray arm 200 is connected to an end of the rotation shaft 300, for example, the rotation shaft 300 has a first end and a second end, the first end is connected to the sub spray arm 200 by injection molding, and a circumferential groove 310 is formed on a surface of the first end of the rotation shaft 300 along a circumferential direction of the rotation shaft 300, so that when the sub spray arm 200 is to be separated from the rotation shaft 300 along an axial direction of the rotation shaft 300, the groove 310 is formed to greatly enhance a connection strength with the sub spray arm 200. For another example, the surface of the first end is provided with a groove 320 extending along the axial direction of the rotating shaft 300, and the groove 320 can be processed on the surface of the first end of the rotating shaft 300 by a knurling process, so that when the rotating shaft 300 and the auxiliary spray arm 200 are about to rotate relatively, relative sliding between the two can be effectively prevented, and the auxiliary spray arm 200 can be effectively rotatably arranged on the main spray arm 100 under the action of the rotating shaft 300.

As described with reference to fig. 7 and 8, the auxiliary spray arm 200 is mainly composed of an auxiliary spray arm lower piece 220 and an auxiliary spray arm upper piece 210, an edge of the auxiliary spray arm lower piece 220 is opposite to an edge of the auxiliary spray arm upper piece 210, and the two pieces are connected by welding, so that a first accommodating chamber is formed between the auxiliary spray arm lower piece 220 and the auxiliary spray arm upper piece 210, the auxiliary spray arm lower piece 220 is provided with a water inlet 221, the water inlet 221 is communicated with the first accommodating chamber, water flows out from the main spray arm 100 through the water inlet 221 to the first accommodating chamber of the auxiliary spray arm 200, the auxiliary spray arm upper piece 210 is provided with two nozzles, the water flows out from the nozzles of the auxiliary spray arm upper piece 210, the nozzles of the auxiliary spray arm upper piece 210 are respectively a cleaning nozzle and a driving nozzle, the driving nozzle and the auxiliary spray arm upper piece 210 are at a certain angle to drive the whole auxiliary spray arm 200 to rotate, and the water flow sprayed by the cleaning nozzle is mainly directed toward the tableware to clean the tableware. The rotating shaft 300 is connected to the lower piece 220 of the auxiliary spray arm and extends out of the water inlet 221, and the part of the rotating shaft 300 extending out of the water inlet 221 is rotatably arranged on the main spray arm 100, so that the design difficulty of coaxiality of the rotating shaft 300 and the rotating axis of the auxiliary spray arm 200 can be reduced.

For example, the rotating shaft 300 may be connected to the upper auxiliary nozzle arm piece 210, but if the rotating shaft 300 is connected to the upper auxiliary nozzle arm piece 210 and the rotating shaft 300 extends out of the water inlet 221 and is rotatably connected to the main nozzle arm 100, when the upper auxiliary nozzle arm piece 210 is connected to the lower auxiliary nozzle arm piece 220, the coaxiality of the corresponding portions of the rotating shaft 300 and the lower auxiliary nozzle arm piece 220 needs to be ensured, and the corresponding portion of the lower auxiliary nozzle arm piece 220 is a portion (mentioned below) which needs to be rotatably matched with the main nozzle arm 100, so that the requirement on the connection precision of the upper auxiliary nozzle arm piece 210 and the lower auxiliary nozzle arm piece 220 is high, which increases the difficulty in manufacturing the auxiliary nozzle arm 200. However, if the rotating shaft 300 is connected to the lower auxiliary spray arm piece 220, after the rotating shaft 300 is installed, the connection between the lower auxiliary spray arm piece 220 and the upper auxiliary spray arm piece 210 does not affect the coaxiality of the corresponding parts of the rotating shaft 300 and the lower auxiliary spray arm piece 220, so that the manufacturing difficulty can be greatly reduced, and the yield can be improved. And in another view, the rotating shaft 300 is arranged on the lower piece 220 of the auxiliary spray arm, so that the coaxiality design difficulty of the rotating shaft 300 and the water inlet 221 is reduced, and the resistance of the rotation of the auxiliary spray arm 200 to water flow is avoided.

Referring to fig. 5 and 8, the sub spray arm lower plate 220 is provided with a connection stage 222 and a connection rod 223, and the connection stage 222 is connected to the rotation shaft 300. Specifically, at least two connecting rods 223 are provided, and all the connecting rods 223 are arranged at intervals along the circumferential direction of the water inlet 221, and the connecting table 222 is arranged between the respective connecting rods 223. The sub spray arm lower piece 220, the connection stage 222 and the connecting rod 223 are integrally formed, so that the coaxiality of the corresponding parts of the rotary shaft 300 and the sub spray arm lower piece 220 can be easily ensured when the rotary shaft 300 and the connection stage 222 are connected. The connecting rods 223 are spaced apart to provide a space through which water flows, and the connecting blocks 222 are disposed in the direction of the axis of the rotary shaft 300 of the sub spray arm 200.

Further, as shown in fig. 8, the links 223 extend from the lower sub-arm 220 toward the upper sub-arm 210, and all the links 223 are close to each other toward the rotation axis of the sub-arm 200, so that the links 223 and the connecting base 222 are prevented from protruding from the lower sub-arm 220 and obstructing the connection with the main arm 100. By such a design, the connecting rod 223 and the connecting platform 222 form a cover-shaped structure, and compared with a plane structure, the resistance to the water flow can be reduced on the premise of ensuring the flow rate of the water flow.

With continued reference to fig. 8, the main spray arm 100 is provided with a second accommodating cavity, the water delivered to the spray arm base 400 by the washing pump enters the second accommodating cavity, and a water outlet 111 communicated with the second accommodating cavity is provided at one side of the main spray arm 100 close to the auxiliary spray arm 200, so that the water in the second accommodating cavity enters the first accommodating cavity of the auxiliary spray arm 200 through the water outlet 111 and the water inlet 221 of the auxiliary spray arm 200. The rotation shaft 300 connected to the sub spray arm 200 is inserted through the water outlet 111 of the main spray arm 100, and thus is rotatably connected to the main spray arm 100. For example, when the spray arm is installed in a dishwasher, the sub spray arm 200 may be rotatably disposed at an upper side or a lower side of the main spray arm 100, and the sub spray arm 200 may be rotatably disposed at an upper side of the main spray arm 100 in this application as an example. Thus, the water outlet 111 of the main spray arm 100 and the water inlet 221 of the auxiliary spray arm 200 can be communicated. Just because the pivot 300 adopts the metal material, the size of the delivery port 111 of main spray arm 100 and the water inlet 221 of auxiliary spray arm 200 can reduce the design by furthest, and like this, the girth of runner cross-section also can diminish, thereby the space that rivers can leak diminishes, reduces the leakage rate of rivers effectively to can guarantee the water pressure in the auxiliary spray arm 200, make the rivers that jet out from auxiliary spray arm 200 can effectively wash away the tableware.

With continued reference to fig. 7 and 8, the main spray arm 100 is mainly composed of a main spray arm lower piece 120 and a main spray arm upper piece 110, the edge of the main spray arm lower piece 120 is opposite to the edge of the main spray arm upper piece 110, and the two pieces are connected by welding, so that a second accommodating cavity is formed between the main spray arm lower piece 120 and the main spray arm upper piece 210, the main spray arm upper piece 110 is provided with a water outlet 111, the water outlet 111 is communicated with the second accommodating cavity, the auxiliary spray arm 200 is rotatably arranged on the main spray arm upper piece 110, water flow is input from a washing pump to the second accommodating cavity of the main spray arm 100, and flows into the first accommodating cavity of the auxiliary spray arm 200 through the water outlet 111.

The main nozzle arm upper blade 110 may or may not be provided with a nozzle. Main spray arm upper plate 110 is provided with dead lever 113 and axle sleeve 112, main spray arm upper plate 110, dead lever 113 and axle sleeve 112 integrated into one piece, axle sleeve 112 is used for cooperating with pivot 300, the quantity of dead lever 113 is two at least, each dead lever 113 is alternately set up along the circumference of delivery port 111, the dead lever 113 of alternately setting provides the space that rivers pass through, axle sleeve 112 is fixed between each dead lever 113, so can reduce axle sleeve 112 and the axiality design degree of difficulty of vice spray arm 200 axis of rotation.

For example, the shaft sleeve 112 may be connected to the main arm lower piece 120, but if the shaft sleeve 112 is connected to the main arm lower piece 120, when the main arm upper piece 110 is connected to the main arm lower piece 120, it is necessary to ensure the coaxiality of the corresponding parts of the shaft sleeve 112 and the main arm upper piece 110, and the corresponding part of the main arm upper piece 110 is a part (to be mentioned later) that needs to be rotationally matched with the auxiliary spray arm 200, so that the requirement on the connection precision of the main arm upper piece 110 and the main arm lower piece 120 is high, which increases the difficulty in manufacturing the main spray arm 100. However, if the rotary shaft 300 is connected to the main nozzle arm upper piece 110, the connection between the main nozzle arm lower piece 120 and the main nozzle arm upper piece 110 does not affect the coaxiality of the corresponding parts of the shaft sleeve 112 and the main nozzle arm upper piece 110, so that the manufacturing difficulty of the main nozzle arm 100 can be greatly reduced, and the yield can be improved. And in another view, the shaft sleeve 112 is arranged on the upper piece 110 of the main spray arm, so that the design difficulty of the coaxiality of the shaft sleeve 112 and the water outlet 111 is also reduced.

Further, as shown in fig. 3 and 8, the fixing rods 113 extend from the upper main nozzle arm piece 110 to the lower main nozzle arm piece 120, and all the fixing rods 113 are close to each other toward the rotation axis of the auxiliary nozzle arm 200, so that the fixing rods 113 and the shaft sleeve 112 are prevented from protruding from the upper main nozzle arm piece 110 and obstructing the connection with the auxiliary nozzle arm 200. And through the design, the fixed rod 113 and the shaft sleeve 112 form an inverted cover-shaped structure, and compared with a plane structure, the resistance to water flow can be reduced on the premise of ensuring the flow rate of the water flow.

As shown in fig. 4, 5 and 8, the auxiliary spray arm 200 is provided with a first boss 224, the first boss 224 is located on one side of the auxiliary spray arm 200 close to the main spray arm 100, for example, the auxiliary spray arm 200 includes an auxiliary spray arm lower piece 220 and an auxiliary spray arm upper piece 210, the auxiliary spray arm lower piece 220 and the auxiliary spray arm upper piece 210 are connected to form a first accommodating cavity, the auxiliary spray arm lower piece 220 is provided with a water inlet 221 communicated with the first accommodating cavity, and a first boss 224 surrounding the water inlet 221 is arranged on the lower surface of the auxiliary spray arm lower piece 220, so that one side of the auxiliary spray arm 200 close to the main spray arm 100 is the auxiliary spray arm lower piece 220.

The main spray arm 100 is provided with a second boss 114, the second boss 114 is located on one side of the main spray arm 100 close to the auxiliary spray arm 200, for example, the main spray arm 100 comprises a main spray arm lower piece 120 and a main spray arm upper piece 110, the main spray arm lower piece 120 and the main spray arm upper piece 110 are connected to form a second accommodating cavity, the main spray arm upper piece 110 is provided with a water outlet 111 communicated with the second accommodating cavity, the upper surface of the main spray arm upper piece 110 is provided with the second boss 114 surrounding the water outlet 111, and thus it can be seen that one side of the main spray arm 100 close to the auxiliary spray arm 200 is the main spray arm upper piece 110.

The first boss 224 is embedded inside the second boss 114, and the auxiliary spray arm 200 and the main spray arm 100 are rotatably engaged with each other. The outer side of the first boss 224 may be provided with a rib 225, and the rib 225 extends along the circumferential direction of the first boss 224. The number of the first ribs 225 may be one or more, and if there are a plurality of first ribs, they are spaced apart from each other in the axial direction of the first boss 224. When the first boss 224 and the second boss 114 are matched to rotate, the convex rib 225 can effectively form a seal with the inner side of the second boss 114, so that the resistance of water flow leakage is increased, and the leakage amount is reduced.

The inner side of the second boss 114 may be provided with a vertical groove 115, and the vertical groove 115 extends in the axial direction of the second boss 114. The number of the vertical grooves 115 may be one or more, and in the case of a plurality of vertical grooves 115, the vertical grooves 115 are arranged at intervals in the circumferential direction of the second boss 114. In this way, when the first boss 224 and the second boss 114 are rotatably engaged, the residue in the water flow can be discharged from the vertical groove 115, and the auxiliary spray arm 200 can be prevented from being stopped due to the residue jamming. It can be seen that the first projection 224 forms the corresponding part of the aforementioned lower piece 220 of the secondary nozzle arm, i.e. the rotation shaft 300 needs to ensure the coaxiality with the first projection 224. The second boss 114 constitutes the aforementioned corresponding portion of the main nozzle arm upper blade 110, i.e., the boss 112 is required to ensure the coaxiality with the second boss 114.

As shown in fig. 1, 4 and 6, the main spray arm 100 includes a first side and a second side opposite to each other, for example, the main spray arm 100 includes a main spray arm lower piece 120 and a main spray arm upper piece 110, the first side is the main spray arm upper piece 110, the second side is the main spray arm lower piece 120, and the auxiliary spray arm 200 is disposed near the first side. For example, the sub-spray arm 200 includes an upper sub-spray arm piece 210 and a lower sub-spray arm piece 220, and the sub-spray arm 200 is rotatably provided to the upper main spray arm piece 110 by the lower sub-spray arm piece 220. The rotary shaft 300 penetrates the main nozzle arm upper piece 110 and the main nozzle arm lower piece 120 from the auxiliary nozzle arm lower piece 220, so that the end of the rotary shaft 300 is exposed from the second side of the main nozzle arm 100, i.e., the main nozzle arm lower piece 120, and thus the end of the rotary shaft 300 can be restrained by the fixing piece 350, and the rotary shaft 300 is prevented from moving in the axial direction. For example, a transverse groove 330 is formed at the end of the rotating shaft 300, the snap spring is clamped in the transverse groove 330, and a locknut is installed at the end of the rotating shaft 300.

Further, referring to fig. 1 and 2, the main nozzle arm 100 is rotatably installed at the nozzle arm base 400, the main nozzle arm lower 120 is installed at the main shaft 420 to be rotatably installed at the nozzle arm base 400 through the main shaft 420, the nozzle arm base 400 is provided with a first gear 410, the nozzle arm base 400 and the first gear 410 are coaxially designed, the sub-nozzle arm 200 is connected with a first end of the rotation shaft 300 and is relatively immovable, a second end of the rotation shaft 300 is exposed to a lower surface of the main nozzle arm lower 120, and a second end of the rotation shaft 300 is provided with a second gear 340 engaged with the first gear 410. By designing the gear ratio of the first gear 410 and the second gear 340, different water jet trajectories can be realized. Specifically, the second end of the rotating shaft 300 has a non-circular cross section, such as a D-shape, and also such as a square shape, so that the rotating shaft 300 and the second gear 340 are effectively connected in the rotating direction.

The above description is only a preferred embodiment of the present application, and is not intended to limit the scope of the present application, and all modifications, equivalents, and direct/indirect applications in other related technical fields within the spirit of the present application are included in the scope of the present application.

Claims (14)

1. A spray arm, comprising:

a main spray arm;

an auxiliary spray arm; and

the pivot, the pivot is rotatable to be located main spray arm, vice spray arm with the pivot is connected in order to pass through the pivot is rotatable to be located main spray arm is in order to receive and come from the fluid of main spray arm, the material of pivot is the metal.

2. The spray arm of claim 1 wherein said spindle is injection molded with said secondary spray arm.

3. The spray arm of claim 2, wherein an end of the spindle is connected to the sub spray arm;

the tip of pivot is equipped with along the recess of the circumference extension of pivot, and/or be equipped with along the axial extension's of pivot slot.

4. The spray arm of any one of claims 1 to 3, wherein the auxiliary spray arm comprises an upper auxiliary spray arm piece and a lower auxiliary spray arm piece, the upper auxiliary spray arm piece and the lower auxiliary spray arm piece are connected to form a first accommodating cavity, the lower auxiliary spray arm piece is provided with a water inlet communicated with the first accommodating cavity, and the rotating shaft is connected with the lower auxiliary spray arm piece and extends out of the water inlet, so that the auxiliary spray arm can be rotatably arranged on the main spray arm through the lower auxiliary spray arm piece.

5. The spray arm of claim 4, wherein the lower plate of the auxiliary spray arm is provided with at least two connecting rods and connecting platforms, the connecting rods are arranged at intervals along the circumferential direction of the water inlet, the connecting platforms are fixed between the connecting rods, and the rotating shaft is connected with the connecting platforms.

6. The spray arm of claim 5 wherein said links extend from said lower secondary spray arm piece toward said upper secondary spray arm piece and said links converge toward each other.

7. The spray arm of claim 4 wherein said main spray arm defines a second receiving chamber, a side of said main spray arm adjacent said secondary spray arm defines an outlet communicating with said second receiving chamber, and said pivot shaft extends through said outlet from said secondary spray arm to rotatably connect to a side of said main spray arm adjacent said secondary spray arm.

8. The spray arm of claim 7, wherein the main spray arm comprises a main spray arm upper piece and a main spray arm lower piece, the main spray arm upper piece and the main spray arm lower piece are connected to form the second accommodating cavity, the water outlet is arranged on the main spray arm upper piece, and the auxiliary spray arm is rotatably arranged on the main spray arm upper piece;

the main spray arm upper piece is equipped with axle sleeve and dead lever, the dead lever is two at least and follows the circumference of delivery port is alternate sets up, the axle sleeve is fixed in between each dead lever, the pivot is rotatable wear to establish the axle sleeve.

9. The spray arm of claim 8 wherein said securing posts extend from said main spray arm upper piece toward said main spray arm lower piece and said securing posts are close together.

10. The spray arm of claim 7, wherein a side of the secondary spray arm adjacent to the primary spray arm is provided with a first boss surrounding the water inlet, a side of the primary spray arm adjacent to the secondary spray arm is provided with a second boss surrounding the water outlet, and the first boss is arranged on the inner side of the second boss;

the outside of first boss is equipped with along the protruding muscle of the circumference extension of first boss, and/or the inboard of second boss is equipped with along the vertical groove of the axial extension of second boss.

11. The spray arm of claim 7 wherein the main spray arm has opposing first and second sides, the secondary spray arm is disposed adjacent the first side, the pivot extends through the first and second sides such that an end of the pivot is exposed at the second side and is constrained by a fastener.

12. The spray arm of claim 11, wherein a first end of the shaft is connected to the secondary spray arm and a second end of the shaft is exposed at the second side;

the spray arm is characterized in that the spray arm further comprises a spray arm seat, the main spray arm is rotatably arranged on the spray arm seat, the spray arm seat is provided with a first gear, and a second end of the rotating shaft is provided with a second gear meshed with the first gear.

13. The spray arm of claim 12 wherein the second end of the spindle is non-circular in cross-section in a radial direction of the spindle.

14. A dishwasher, characterized by comprising a spray arm according to any one of claims 1 to 13.

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