CN216364962U - Spray arm assembly and dish washing machine - Google Patents

Abstract

The utility model relates to a kitchen appliance technical field especially relates to a spray arm subassembly and dish washer. The spraying arm assembly comprises an incomplete gear and an auxiliary spraying arm, the incomplete gear is in transmission connection with the auxiliary spraying arm so that the auxiliary spraying arm can rotate in the inner container of the dish washing machine, and the spraying track of the auxiliary spraying arm covers four corners of the inner container of the dish washing machine in the rotating process. The transmission through incomplete gear and vice spray arm is connected for vice spray arm can rotate in the dish washer inner bag, simultaneously, at rotatory in-process, vice spray arm can extend to the four corners of dish washer inner bag, thereby sprays the washing to the tableware that is in the four corners of dish washer inner bag, has improved the cleaning performance.

Description

Spray arm assembly and dish washing machine

Technical Field

The utility model relates to a kitchen appliance technical field especially relates to a spray arm subassembly and dish washer.

Background

At present, when most dish washers are used for washing dishes, a spray arm in the dish washer rotates around the axis of a central shaft of a spray arm seat, and the spray track is circular. The cross section of the inner cavity of the existing dish washer is generally square, so that the four corners of the inner container can not be covered, cleaning dead angles at the four corners can be generated, and tableware at the four corners can not be cleaned in place.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a spray arm subassembly and dish washer to alleviate the technical problem that exists among the prior art because the orbit that sprays of current spray arm is circular, and the cross-sectional shape of current dish washer inner chamber is square usually, leads to the inner bag four corners position to cover, can produce the washing dead angle of four corners positions, and the tableware that is in the four corners position washs not in place.

Based on the above purpose, the present disclosure provides a spray arm assembly, including incomplete gear and vice spray arm, incomplete gear with vice spray arm transmission is connected, so that vice spray arm can rotate in the dish washer inner bag, and makes at rotatory in-process the orbit that sprays of vice spray arm covers the four corners of dish washer inner bag.

Further, in certain optional embodiments, the secondary spray arm is provided with a spray arm gear, and the transmission ratio between the incomplete gear and the spray arm gear is not more than 1: 4.

further, in some optional embodiments, the incomplete gear is in transmission connection with the spray arm gear through a transmission mechanism, and the transmission ratio between the incomplete gear and the spray arm gear is 1: 4.

further, in some optional embodiments, the incomplete gear is fixedly provided with a first stop, one side of the first stop is provided with a second stop connected with the secondary spray arm, and the first stop and the second stop cooperate to limit the movement of the secondary spray arm.

Further, in some optional embodiments, the first stopper includes four stop pieces, the four stop pieces are uniformly spaced along the axis of the incomplete gear, and each of the four stop pieces has an arc-shaped edge coaxially disposed with the incomplete gear, and the radius of the arc-shaped edge is larger than that of the incomplete gear;

the arc-shaped edge of the stop piece can be matched with the edge of the second stop piece after the first transmission gear is separated from the toothed section of the incomplete gear.

Further, in certain alternative embodiments, the second stop is square-like, and four edges of the second stop are curved toward a direction near the center of the second stop.

Further, in some optional embodiments, the incomplete gear is provided with a first fixing portion, and the first stopper is provided with a first fixing mating portion, and the first fixing portion is mated with the first fixing mating portion to fix the first stopper on the incomplete gear.

Further, in some optional embodiments, the first fixing portion is a pin shaft, and the first fixing matching portion is a pin shaft hole, or the first fixing portion is a pin shaft hole, and the first fixing matching portion is a pin shaft.

Further, in some optional embodiments, the spray device further comprises a second fixing part, the secondary spray arm is connected with the second fixing part, the second stop piece is provided with a second fixing matching part, and the second fixing part is matched with the second fixing matching part to connect the second stop piece with the secondary spray arm.

Further, in some optional embodiments, the second fixing portion is a pin shaft, and the second fixing matching portion is a pin shaft hole, or the second fixing portion is a pin shaft hole, and the second fixing matching portion is a pin shaft.

Further, in some alternative embodiments, four of the stop tabs are integrally formed.

Further, in some alternative embodiments, the transmission mechanism includes a first transmission gear, a second transmission gear, and a third transmission gear, and the first transmission gear, the second transmission gear, and the third transmission gear are the same;

four toothed sections are uniformly arranged on the circumferential surface of the incomplete gear at intervals, the first transmission gear is meshed with the toothed sections, and the third transmission gear is meshed with the spray arm gear; the transmission ratio between the incomplete gear and the first transmission gear is 1: 2, the transmission ratio between the third transmission gear and the spray arm gear is 1: 2.

further, in some optional embodiments, the spray arm assembly further comprises a main spray arm, and the secondary spray arm is rotatably connected with the main spray arm.

Further, in some optional embodiments, the number of the secondary spray arms is two, and the two secondary spray arms are respectively arranged at two ends of the main spray arm; the central line of the main spray arm is superposed with the central line of the incomplete gear.

Further, in some optional embodiments, the spray arm assembly further comprises a spray arm seat, and the gear shaft of the partial gear is fixedly connected with the spray arm seat.

Further, in some optional embodiments, the spray arm seat is provided with a receiving groove, a groove wall of the receiving groove is provided with a limiting part, a circumferential surface of the gear shaft of the partial gear is provided with a limiting matching part, and the limiting part is matched with the limiting matching part to fix the gear shaft in the receiving groove.

Further, in some optional embodiments, the auxiliary spray arm is connected with the main spray arm through a connecting shaft of a spray arm gear, a through hole is formed in the circumferential side wall of the connecting shaft, and both the inner cavity of the auxiliary spray arm and the inner cavity of the main spray arm are communicated with the inner cavity of the connecting shaft.

Further, in certain alternative embodiments, the secondary spray arm is provided with a sleeve, the axis of which coincides with the center line of the secondary spray arm.

Further, in some optional embodiments, the inner wall of the sleeve is provided with a first limiting protrusion, the first limiting protrusion extends along the axial direction of the sleeve, and the circumferential surface of the connecting shaft is provided with a first limiting groove matched with the first limiting protrusion; the inner wall of the sleeve is provided with a second limiting protrusion, the second limiting protrusion extends along the circumferential direction of the sleeve, and a second limiting groove matched with the second limiting protrusion is formed in the circumferential surface of the connecting shaft.

Based on the above purpose, the present disclosure also provides a dishwasher including the spray arm assembly.

Compared with the prior art, the beneficial effect of this disclosure is:

the utility model provides a spray arm subassembly, including incomplete gear and vice spray arm, incomplete gear with vice spray arm transmission is connected, so that vice spray arm can rotate in the dish washer inner bag, and makes at rotatory in-process the spraying orbit of vice spray arm covers the four corners of dish washer inner bag.

Based on this structure, the spray arm subassembly that this disclosure provided is connected through the transmission of incomplete gear with vice spray arm for vice spray arm can rotate in the dish washer inner bag, simultaneously, at rotatory in-process, the orbit that sprays of vice spray arm can cover the four corners of dish washer inner bag, thereby sprays the washing to the tableware that is in the four corners of dish washer inner bag, has improved the cleaning performance.

Further, the auxiliary spray arm is provided with a spray arm gear, and the transmission ratio between the incomplete gear and the spray arm gear is not more than 1: 4. the mode can ensure that the spraying track of the auxiliary spraying arm is generated outside the original circular spraying track, the spraying track of the auxiliary spraying arm is an arc line protruding towards the groove wall of the inner container of the dish washing machine, namely the spraying track of the auxiliary spraying arm is closer to the four corners of the inner container of the dish washing machine.

Drawings

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

FIG. 1 is a schematic structural view of a spray arm assembly provided by an embodiment of the present disclosure;

FIG. 2 is an exploded view of a spray arm assembly provided by embodiments of the present disclosure;

FIG. 3 is an exploded view of a main spray arm, partial gear and spray arm seat of a spray arm assembly provided by an embodiment of the present disclosure;

FIG. 4 is a cross-sectional view of a main spray arm, partial gear and spray arm seat of a spray arm assembly provided by an embodiment of the present disclosure;

FIG. 5 is a schematic structural view of a secondary spray arm of a spray arm assembly provided by an embodiment of the present disclosure;

FIG. 6 is a schematic structural view of a spray arm gear in a spray arm assembly provided by an embodiment of the present disclosure;

FIG. 7 is a cross-sectional view of a secondary spray arm of a spray arm assembly in accordance with an embodiment of the present disclosure in cooperation with a spray arm gear;

FIG. 8 is a schematic view of a spray arm assembly provided by an embodiment of the present disclosure in an initial position;

FIG. 9 is a schematic view of a spray arm assembly provided by an embodiment of the present disclosure rotated 22.5 from the initial position shown in FIG. 8;

FIG. 10 is a schematic view of a spray arm assembly provided by an embodiment of the present disclosure rotated 22.5 from the position shown in FIG. 9;

FIG. 11 is a schematic view of a spray arm assembly provided by the disclosed embodiment rotated 45 from the position shown in FIG. 10;

FIG. 12 is a schematic view of a spray arm assembly provided by an embodiment of the present disclosure rotated 22.5 from the position shown in FIG. 11;

FIG. 13 is a schematic view of a spray arm assembly rotated 180 from an initial position provided by an embodiment of the present disclosure;

fig. 14 is a spray trajectory of a spray arm assembly provided by embodiments of the present disclosure.

Icon: 100-spraying track; 101-incomplete gear; 102-secondary spray arm; 103-main spray arm; 104-a rack; 105-a toothed segment; 106-spray arm seat; 107-water supply channel; 108-a water inlet channel; 109-a limiting part; 110-a limit fitting; 111-spray arm gear; 112-a connecting shaft; 113-a via; 114-a cannula; 115-a first stop lobe; 116-a first retaining groove; 117-second limit projection; 118-a second restraint slot; 121-a first transmission gear; 122-a second drive gear; 123-a third transmission gear; 124-a first stop; 1241-curved edge; 125-a second stop; 126-a first fixed part; 127-a first fixed mating portion; 128-a second fixed part; 129-a second fixed mating portion; 130-inner container of dish washer.

Detailed Description

The technical solutions of the present disclosure will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are only some embodiments of the present disclosure, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.

In the description of the present disclosure, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, their indicated orientations or positional relationships are based on those shown in the drawings only for the convenience of describing the present disclosure and simplifying the description, but not for indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present disclosure. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present disclosure, it should be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present disclosure can be understood in specific instances by those of ordinary skill in the art.

Referring to fig. 1 to 14, the present embodiment provides a spray arm assembly, which comprises an incomplete gear 101 and a secondary spray arm 102, wherein the incomplete gear 101 is in transmission connection with the secondary spray arm 102, so that the secondary spray arm 102 can rotate in a dishwasher liner 130, and a spray track of the secondary spray arm 102 covers four corners of the dishwasher liner 130 during the rotation.

Based on this structure, the spray arm subassembly that this embodiment provided is connected through incomplete gear 101 and vice spray arm 102's transmission for vice spray arm 102 can rotate in dish washer inner bag 130, and simultaneously, at rotatory in-process, the orbit that sprays of vice spray arm 102 can cover the four corners of dish washer inner bag 130, thereby sprays the washing to the tableware that is in the four corners of dish washer inner bag 130, has improved the cleaning performance.

Further, in some alternative embodiments, referring to fig. 1, the spray arm assembly further comprises a main spray arm 103, and the secondary spray arm 102 is rotatably connected to the main spray arm 103.

The main spray arm 103 is provided with spray holes, the spray track 100 of the main spray arm 103 is circular, the auxiliary spray arm 102 is rotatably connected with the main spray arm 103, when the main spray arm 103 rotates, the auxiliary spray arm 102 is driven to rotate around the axis of the main spray arm 103, meanwhile, the auxiliary spray arm 102 is in transmission connection with the incomplete gear 101 and can rotate around the axis of the auxiliary spray arm 102, when the main spray arm 103 rotates to the length direction of the main spray arm 103 and the diagonal line of the dishwasher liner 130 is large, the length direction of the auxiliary spray arm 102 is consistent with the length direction of the main spray arm 103, which is equivalent to lengthening the main spray arm 103, at this moment, the auxiliary spray arm 102 can extend to the corner of the dishwasher liner 130 to spray and clean tableware at the corner.

Further, in some optional embodiments, the number of the secondary spray arms 102 is two, and the two secondary spray arms 102 are respectively arranged at two ends of the main spray arm 103; the center line of the main nozzle arm 103 coincides with the center line of the incomplete gear 101.

Specifically, the two sub shower arms 102 are symmetrically provided at both ends of the main shower arm 103, and when the main shower arm 103 rotates, the operation resistance is small with the center of the incomplete gear 101 as the rotation center.

The number of the sub spray arms 102 may be one, the sub spray arms 102 are rotatably connected to one end of the main spray arm 103, and the center line of the main spray arm 103 overlaps with the center line of the partial gear 101.

In some alternative embodiments, the spray arm assembly further includes a frame 104, the frame 104 having a receiving cavity in which the partial gear 101 is located. The main spray arm 103 is fixedly connected with the frame 104.

It should be noted that the incomplete gear 101 may be disposed in the inner cavity of the main spray arm 103.

Further, in some optional embodiments, the spray arm assembly further comprises a spray arm seat 106, and the gear shaft of the incomplete gear 101 is fixedly connected with the spray arm seat 106.

Referring to fig. 4, the spray arm base 106 is provided with a water supply passage 107, the incomplete gear 101 is provided with a water inlet passage 108, and the water supply passage 107 and the water inlet passage 108 are both communicated with the inner cavity of the main spray arm 103.

The frame 104 is provided with a through hole, and a gear shaft of the incomplete gear 101 passes through the through hole and is fixedly connected with the spray arm seat 106. When the spray arm assembly works, water flow enters the water inlet channel 108 from the water supply channel 107 and then enters the inner cavity of the main spray arm 103 and is ejected out of the spray holes of the main spray arm 103, the main spray arm 103 starts to rotate around the axis of the main spray arm 103 under the driving of the reaction force of the water flow, the auxiliary spray arm 102 rotates along with the main spray arm 103, the auxiliary spray arm 102 can rotate relative to the incomplete gear 101 because the incomplete gear 101 is fixed, and the auxiliary spray arm 102 can rotate around the axis of the auxiliary spray arm 102 and extends to four corners of the inner container 130 of the dishwasher through a transmission relation.

Further, in some alternative embodiments, the spray arm base 106 is provided with a receiving groove, a groove wall of the receiving groove is provided with a limiting portion 109, a circumferential surface of the gear shaft of the incomplete gear 101 is provided with a limiting fitting portion 110, and the limiting portion 109 is fitted with the limiting fitting portion 110 to fix the gear shaft in the receiving groove.

Specifically, the shape of the cross section of the holding tank is circular, and the tank bottom of the holding tank is provided with a water inlet that communicates with water supply channel 107.

In one possible design, referring to fig. 3, the position-limiting portion 109 is a position-limiting groove, and the position-limiting engagement portion 110 is a position-limiting protrusion. Optionally, the number of the limiting grooves is four, the four limiting grooves are uniformly arranged on the inner surface of the groove wall of the accommodating groove at intervals, and the length direction of the limiting grooves is parallel to the axial direction of the accommodating groove. Correspondingly, the number of the limiting convex strips is four, the positions of the limiting convex strips correspond to the positions of the limiting grooves one by one, the limiting convex strips are limited in the limiting grooves, and the incomplete gear 101 can be prevented from rotating.

In another possible design, the position-limiting portion 109 is a position-limiting protrusion, and the position-limiting engagement portion 110 is a position-limiting groove.

Further, in certain alternative embodiments, the secondary spray arm 102 is provided with a spray arm gear 111, and the transmission ratio between the incomplete gear 101 and the spray arm gear 111 is not more than 1: 4. in this way, the spraying track 100 of the secondary spraying arm 102 is ensured to be generated outside the original circular spraying track 100, and the spraying track 100 of the secondary spraying arm 102 is an arc line protruding towards the groove wall close to the inner container 130 of the dishwasher, that is, the spraying track 100 of the secondary spraying arm 102 is closer to the four corners of the inner container 130 of the dishwasher.

Further, in certain alternative embodiments, the secondary spray arm 102 is connected to the primary spray arm 103 through a connecting shaft 112 of a spray arm gear 111. The connecting shaft 112 may be tubular, as shown in fig. 6, a through hole 113 is formed in a circumferential side wall of the connecting shaft 112, and both an inner cavity of the auxiliary spray arm 102 and an inner cavity of the main spray arm 103 are communicated with the inner cavity of the connecting shaft 112.

Specifically, the spray arm gear 111 is disposed in the accommodating cavity of the rack 104, the secondary spray arm 102 is located outside the main spray arm 103, in this embodiment, the secondary spray arm 102 is located on one side of the main spray arm 103 away from the rack 104, the main spray arm 103 is provided with a mounting hole, the connecting shaft 112 of the spray arm gear 111 passes through the mounting hole, and the secondary spray arm 102 is fixedly connected with the spray arm gear 111.

Further, in certain alternative embodiments, as shown in fig. 5, the secondary spray arm 102 is provided with a sleeve 114, the axis of the sleeve 114 coinciding with the centerline of the secondary spray arm 102.

The inner wall of the sleeve 114 may be provided with a first limiting protrusion 115, the first limiting protrusion 115 extends along the axial direction of the sleeve 114, and the circumferential surface of the connecting shaft 112 is provided with a first limiting groove 116 matched with the first limiting protrusion 115; the inner wall of the sleeve 114 is provided with a second limiting protrusion 117, the second limiting protrusion 117 extends along the circumferential direction of the sleeve 114, and the circumferential surface of the connecting shaft 112 is provided with a second limiting groove 118 matched with the second limiting protrusion 117.

Optionally, the number of the first limiting protrusions 115 is two, and the two first limiting protrusions 115 are symmetrically arranged along the radial direction of the sleeve 114. The number of the first limiting grooves 116 is also two, the two first limiting grooves 116 are symmetrically arranged along the radial direction of the connecting shaft 112, the connecting shaft 112 penetrates through the sleeve 114, and the first limiting protrusions 115 are limited in the first limiting grooves 116, so that the auxiliary spray arm 102 can be prevented from rotating relative to the connecting shaft 112.

The second limiting protrusion 117 may be an annular protrusion, and in this embodiment, the second limiting protrusion 117 includes two arc-shaped protrusions, and the two arc-shaped protrusions and the two first limiting protrusions 115 are alternately arranged along the circumferential direction of the sleeve 114. The second limiting groove 118 is an annular groove, and the second limiting groove 118 is communicated with the first limiting groove 116. The connecting shaft 112 is inserted into the sleeve 114, and the second limiting protrusion 117 is limited in the second limiting groove 118, so that the secondary spray arm 102 can be prevented from being separated from the spray arm gear 111.

Optionally, in this embodiment, the incomplete gear 101 is in transmission connection with the spray arm gear 111 through a transmission mechanism, and a transmission ratio between the incomplete gear 101 and the spray arm gear 111 is 1: 4.

further, in some alternative embodiments, the transmission mechanism includes a first transmission gear 121, a second transmission gear 122 and a third transmission gear 123, and the first transmission gear 121, the second transmission gear 122 and the third transmission gear 123 are the same; four toothed sections 105 are uniformly arranged on the circumferential surface of the incomplete gear 101 at intervals, a first transmission gear 121 is meshed with the toothed sections 105, and a third transmission gear 123 is meshed with the spray arm gear 111; the transmission ratio between the incomplete gear 101 and the first transmission gear 121 is 1: 2, the transmission ratio between the third transmission gear 123 and the spray arm gear 111 is 1: 2.

in this embodiment, the number of the transmission mechanisms is two, and the two auxiliary spray arms 102 are respectively in transmission connection with the incomplete gear 101 through one transmission mechanism.

Further, in some alternative embodiments, the incomplete gear 101 is fixedly provided with a first stopper 124, one side of the first stopper 124 is provided with a second stopper 125 connected to the secondary spray arm 102, and the first stopper 124 cooperates with the second stopper 125 to limit the movement of the secondary spray arm 102.

When the sub spray arm 102 is provided with the spray arm gear 111 and the incomplete gear 101 is drivingly connected with the spray arm gear 111 through a transmission mechanism, the second stopper 125 may be provided on the transmission mechanism so as to be connected with the sub spray arm 102 through the transmission mechanism. Further, the second stopper 125 may be fixedly disposed on the first transmission gear 121 in the transmission mechanism.

The first stop 124 is located between two adjacent toothed segments 105, and the outer contour of the second stop 125 is inside the root circle of the first transmission gear 121, so as to ensure that the first transmission gear 121 can mesh with the toothed segments 105 of the incomplete gear 101.

When the first transfer gear 121 is disengaged from the toothed segment 105, the first stop 124 can engage the second stop 125, at which point the secondary spray arm 102 is no longer rotated.

The chain line in fig. 8 indicates one diagonal line, and the two-dot chain line indicates the other diagonal line.

In use, the spray arm assembly is mounted in a dishwasher liner 130, and currently, the dishwasher liner 130 is typically a square liner. Referring to fig. 8, in the initial position, the angle θ between the length direction of the main spray arm 103 and the diagonal line of the liner is 22.5 °, the length directions of the secondary spray arms 102 are all perpendicular to the length direction of the main spray arm 103, and the first stopper 124 and the second stopper 125 are matched, and the incomplete gear 101 and the first transmission gear 121 just start to mesh. The main nozzle arm 103 starts to rotate by the water flow. In the present embodiment, the main nozzle arm 103 rotates in the arrow direction a.

Referring to fig. 9, after the main spray arm 103 starts to rotate, the first stopper 124 is separated from the second stopper 125, and the toothed section 105 of the incomplete gear 101 is engaged with the first transmission gear 121, so as to drive the spray arm gear 111 to rotate. When the first transmission gear 121 rotates 22.5 degrees, the length direction of the main spray arm 103 is approximately consistent with the diagonal line of the liner, and the transmission ratio between the incomplete gear 101 and the spray arm gear 111 is 1: 4, the spray arm gear 111 rotates 90 degrees, so that the spray arm gear 111 and the main spray arm 103 are both positioned on a diagonal line of the liner, and the whole length is longest, thereby ensuring the cleaning of two diagonal lines of the liner.

Referring to fig. 10, the first transmission gear 121 continues to rotate 22.5 °, the spray arm gear 111 rotates 90 ° again, and the length direction of the secondary spray arm 102 returns to a state perpendicular to the length direction of the primary spray arm 103, so that the overall length of the secondary spray arm 102 of the primary spray arm 103 is shortest, and the secondary spray arm can smoothly pass through the narrowest part of the dishwasher liner 130, and can avoid collision with two opposite side walls of the dishwasher liner 130. At this time, the first stopper 124 and the second stopper 125 are again in contact, the first transmission gear 121 is about to separate from the toothed section 105 of the incomplete gear 101, and the first stopper 124 and the second stopper 125 relatively slide with the rotation of the main spray arm 103, so that the first transmission gear 121 does not rotate and the sub spray arm 102 does not rotate. Referring to fig. 11, when the main spray arm 103 rotates 45 °, the first stopper 124 is about to separate from the second stopper 125, and the incomplete gear 101 and the first transmission gear 121 start to mesh again.

Referring to fig. 12, when the first transmission gear 121 continues to rotate 22.5 °, the length direction of the main spray arm 103 is substantially consistent with the diagonal line of the inner tub 130 of the dishwasher, and the spray arm gear 111 rotates 90 °, so that the auxiliary spray arm 102 and the main spray arm 103 are both located on the other diagonal line of the inner tub, and the overall length is longest, thereby ensuring that the other two diagonal lines of the inner tub are cleaned.

Then, the main spray arm 103 continues to rotate, and as shown in fig. 13, when the main spray arm 103 rotates to the angle θ between the length direction of the main spray arm 103 and the diagonal line of the liner (shown by the chain line in fig. 13) is 22.5 °, the main spray arm 103 rotates 180 ° from the initial position, and then the above process is repeated until the main spray arm 103 rotates 360 °. At this time, the spray trajectory 100 is as shown in fig. 14. The main spray arm 103 rotates 360 degrees, and can complete twice cleaning of four corners of the inner container, thereby improving the cleaning effect and the cleaning efficiency.

Further, in some alternative embodiments, the first stopper 124 includes four stopper pieces, the four stopper pieces are uniformly spaced along the axis of the incomplete gear 101, and each of the four stopper pieces has an arc-shaped edge 1241 coaxially disposed with the incomplete gear 101, and the radius of the arc-shaped edge 1241 is larger than that of the incomplete gear 101; the arcuate edge 1241 of the stop tab is able to conform to the edge of the second stop 125 after the partial gear 101 is disengaged from the drive connection with the secondary spray arm 102.

Since the gear teeth are not fully arranged on the circumferential side of the incomplete gear 101, a part of the incomplete gear 101 where the gear teeth are not arranged rotates to the side of the sub-shower arm 102, and the incomplete gear 101 is disengaged from the sub-shower arm 102.

Specifically, if the secondary spray arm 102 is provided with the spray arm gear 111, the incomplete gear 101 is in transmission connection with the spray arm gear 111 through the transmission mechanism, and the transmission mechanism includes the first transmission gear 121, when the incomplete gear 101 is separated from the secondary spray arm 102, the first transmission gear 121 is separated from the toothed section 105 of the incomplete gear 101.

Wherein the second stopper 125 may have a square-like shape, and four edges of the second stopper 125 are bent toward a direction near the center of the second stopper 125.

Optionally, the arc degree of the arc-shaped edge 1241 of the stop piece is consistent with the arc degree of the edge of the second stop piece 125, and after the first transmission gear 121 is separated from the toothed section 105 of the incomplete gear 101, along with the rotation of the main spray arm 103, the arc-shaped edge 1241 of the stop piece can be attached to and slide on the edge of the second stop piece 125, so as to ensure that the first transmission gear 121 does not rotate and the secondary spray arm 102 does not rotate.

Alternatively, the incomplete gear 101 is provided with a first fixing portion 126, the first stopper 124 is provided with a first fixing engagement portion 127, and the first fixing portion 126 is engaged with the first fixing engagement portion 127 to fix the first stopper 124 on the incomplete gear 101.

In one possible design, referring to fig. 2, the first fixing portion 126 is a pin, and the first fixing engagement portion 127 is a pin hole. Optionally, the number of the pin shafts is two, and the two pin shafts are symmetrically arranged on two sides of the gear shaft along the radial direction of the incomplete gear 101. The number of the pin shaft holes is also two, and the two pin shaft holes are respectively arranged on the two opposite stop sheets.

In another possible design, the first fixing portion 126 is a pin hole, and the first fixing engagement portion 127 is a pin.

Further, in some alternative embodiments, the spray arm assembly further includes a second fixing portion 128, the secondary spray arm 102 is connected with the second fixing portion 128, the second stopper 125 is provided with a second fixing engagement portion 129, and the second fixing portion 128 is engaged with the second fixing portion 128 to connect the second stopper 125 with the secondary spray arm 102.

Specifically, the auxiliary spray arm 102 is provided with a spray arm gear 111, when the incomplete gear 101 is in transmission connection with the spray arm gear 111 through a transmission mechanism and the transmission mechanism includes a first transmission gear 121, the second fixing portion 128 may be fixedly disposed on the first transmission gear 121, at this time, the second fixing portion 128 is connected with the auxiliary spray arm 102 through the first transmission gear 121, and the second fixing portion 128 is used for being matched with the second fixing matching portion 129 to fix the second stopper 125 on the first transmission gear 121.

In one possible design, referring to fig. 2, the second fixing portion 128 is a pin and the second fixing engagement portion 129 is a pin hole.

In another possible design, the second fixing portion 128 is a pin hole, and the second fixing engagement portion 129 is a pin.

Alternatively, the four stop tabs in this embodiment are integrally formed.

The embodiment also provides a dishwasher, which comprises the spray arm assembly provided by the embodiment.

The dish washer that this embodiment provided owing to used the spray arm subassembly that this embodiment provided, at the in-process of washing tableware, vice spray arm 102 can extend to the four corners of dish washer inner bag 130 to spray the washing to the tableware that is in the four corners of dish washer inner bag 130, improved the cleaning performance.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present disclosure, and not for limiting the same; while the present disclosure has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present disclosure.

Claims (20)

1. The spray arm assembly is characterized by comprising an incomplete gear (101) and a secondary spray arm (102), wherein the incomplete gear (101) is in transmission connection with the secondary spray arm (102) so that the secondary spray arm (102) can rotate in a dishwasher liner (130), and the spray track of the secondary spray arm (102) covers four corners of the dishwasher liner (130) in the rotating process.

2. The spray arm assembly of claim 1, characterized in that the secondary spray arm (102) is provided with a spray arm gear (111), the transmission ratio between the partial gear (101) and the spray arm gear (111) being not more than 1: 4.

3. the spray arm assembly of claim 2, characterized in that the incomplete gear (101) is in transmission connection with the spray arm gear (111) through a transmission mechanism, and the transmission ratio between the incomplete gear (101) and the spray arm gear (111) is 1: 4.

4. the spray arm assembly of claim 1, characterized in that the partial gear (101) is fixedly provided with a first stop (124), one side of the first stop (124) is provided with a second stop (125) connected with the secondary spray arm (102), and the first stop (124) and the second stop (125) cooperate to limit the movement of the secondary spray arm (102).

5. The spray arm assembly of claim 4, characterized in that the first stop (124) comprises four stop tabs, four of which are evenly spaced along the axis of the partial gear (101) and each of which has an arcuate edge (1241) arranged coaxially with the partial gear (101), the arcuate edge (1241) having a radius greater than the radius of the partial gear (101);

the arc-shaped edge (1241) of the stop tab can be adapted to the edge of the second stop (125) after the partial gear (101) has been brought out of driving connection with the secondary spray arm (102).

6. The spray arm assembly of claim 5, characterized in that the second stop (125) is square-like, and four edges of the second stop (125) are curved towards a direction near the center of the second stop (125).

7. The spray arm assembly of claim 4, characterized in that the partial gear (101) is provided with a first fixing portion (126), the first stop member (124) being provided with a first fixing engagement portion (127), the first fixing portion (126) cooperating with the first fixing engagement portion (127) to fix the first stop member (124) on the partial gear (101).

8. The spray arm assembly of claim 7, wherein the first securing portion (126) is a pin and the first securing engagement portion (127) is a pin hole, or the first securing portion (126) is a pin hole and the first securing engagement portion (127) is a pin.

9. The spray arm assembly of claim 4, further comprising a second fixing portion (128), the secondary spray arm (102) being connected to the second fixing portion (128), the second stop member (125) being provided with a second fixing engagement portion (129), the second fixing portion (128) cooperating with the second fixing engagement portion (129) to connect the second stop member (125) to the secondary spray arm (102).

10. The spray arm assembly of claim 9, wherein the second securing portion (128) is a pin and the second securing engagement portion (129) is a pin hole, or the second securing portion (128) is a pin hole and the second securing engagement portion (129) is a pin.

11. The spray arm assembly of claim 6 wherein four of said stop tabs are integrally formed.

12. The spray arm assembly of claim 3, wherein the transmission mechanism comprises a first transmission gear (121), a second transmission gear (122) and a third transmission gear (123), the first transmission gear (121), the second transmission gear (122) and the third transmission gear (123) being identical;

four toothed sections (105) are uniformly arranged on the circumferential surface of the incomplete gear (101) at intervals, the first transmission gear (121) is meshed with the toothed sections (105), and the third transmission gear (123) is meshed with the spray arm gear (111); the transmission ratio between the incomplete gear (101) and the first transmission gear (121) is 1: 2, the transmission ratio between the third transmission gear (123) and the spray arm gear (111) is 1: 2.

13. the spray arm assembly of any one of claims 1 to 12 further comprising a primary spray arm (103), the secondary spray arm (102) being pivotally connected to the primary spray arm (103).

14. The spray arm assembly of claim 13, characterized in that the number of the secondary spray arms (102) is two, two of the secondary spray arms (102) being arranged at each end of the main spray arm (103); the central line of the main spray arm (103) is coincident with the central line of the incomplete gear (101).

15. The spray arm assembly of any one of claims 1 to 12, further comprising a spray arm mount (106), wherein the gear shaft of the partial gear (101) is fixedly connected with the spray arm mount (106).

16. The spray arm assembly of claim 15, characterized in that the spray arm socket (106) is provided with a receiving groove, a groove wall of the receiving groove is provided with a limit part (109), a circumferential surface of the gear shaft of the incomplete gear (101) is provided with a limit fitting part (110), and the limit part (109) is fitted with the limit fitting part (110) to fix the gear shaft in the receiving groove.

17. The spray arm assembly of claim 13, characterized in that the secondary spray arm (102) is connected with the main spray arm (103) through a connecting shaft (112) of a spray arm gear (111), the circumferential side wall of the connecting shaft (112) is provided with a through hole (113), and the inner cavity of the secondary spray arm (102) and the inner cavity of the main spray arm (103) are both communicated with the inner cavity of the connecting shaft (112).

18. The spray arm assembly of claim 17, characterized in that the secondary spray arm (102) is provided with a sleeve (114), the axis of the sleeve (114) coinciding with the centre line of the secondary spray arm (102).

19. The spray arm assembly of claim 18, characterized in that the inner wall of the sleeve (114) is provided with a first limit projection (115), the first limit projection (115) extends in the axial direction of the sleeve (114), and the circumferential surface of the connecting shaft (112) is provided with a first limit groove (116) which is matched with the first limit projection (115); the inner wall of sleeve pipe (114) is provided with second spacing arch (117), second spacing arch (117) are followed the circumference of sleeve pipe (114) extends, the circumferential surface of connecting axle (112) be provided with spacing protruding (117) matched with second spacing groove (118).

20. A dishwasher, comprising a spray arm assembly as claimed in any one of claims 1 to 19.

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