Spray arm assembly and dishwasher

Abstract

This application discloses a spray arm assembly and a dishwasher. The spray arm assembly includes a spray arm body, a first nozzle, a sliding plate, and a drive mechanism. The spray arm body is adapted to rotate about a first rotation axis and has a water flow channel. The first nozzle is movably disposed on the spray arm body and communicates with the water flow channel. The sliding plate is mounted on the upper surface of the spray arm body and can reciprocate relative to the spray arm body along a first direction. The sliding plate and the first nozzle are coupled. The drive mechanism is installed below the spray arm body and includes a drive shaft. The drive shaft passes through the upper and lower surfaces of the spray arm body and is coupled to the sliding plate. The drive shaft is adapted to drive the sliding plate to reciprocate along the first direction when the spray arm body rotates about the first rotation axis. The sliding plate is adapted to drive the first nozzle to move during the reciprocating movement along the first direction, thereby changing the orientation of the first nozzle relative to the spray arm body. The movement of the first nozzle, thereby changing the orientation of the first nozzle relative to the spray arm body, helps to reduce washing dead zones and improve the washing effect.

Description

Technical Field

[0001] This application relates to the field of dishwashers, and more particularly to a spray arm assembly and a dishwasher. Background Technology

[0002] The spray arm is a key component of the dishwasher's spray system. When the dishwasher is working, water is sprayed out through the rotating spray arm and directed at the dishes, rinsing their surfaces. The cleaning effect of the dishes is closely related to the design of the spray arm, and the cleaning effect of the current spray arm still needs improvement. Utility Model Content

[0003] This application aims to at least partially address one of the technical problems in the related art. To this end, this application proposes a spray arm assembly.

[0004] To achieve the above objectives, this application discloses a spray arm assembly, the spray arm assembly comprising:

[0005] The spray arm body is adapted to rotate around a first rotation axis, and the spray arm body is provided with a water flow channel;

[0006] The first nozzle is movably mounted on the spray arm body and communicates with the water flow channel;

[0007] A sliding plate, fitted to the upper surface of the spray arm body and movable reciprocating relative to the spray arm body along a first direction, the sliding plate being coupled to the first nozzle; and

[0008] A drive mechanism is installed below the spray arm body. The drive mechanism includes a drive shaft that passes through the upper and lower surfaces of the spray arm body and is coupled to the slide plate. The drive shaft of the drive mechanism is adapted to drive the slide plate to reciprocate along the first direction when the spray arm body rotates about the first rotation axis. The slide plate is adapted to drive the first nozzle to move when it reciprocates along the first direction, so as to change the orientation of the first nozzle relative to the spray arm body.

[0009] In some embodiments of this application, the driving mechanism includes:

[0010] The first gear is coaxially arranged with the spray arm body and located below the spray arm body. The spray arm body is rotatable relative to the first gear to rotate about the first rotation axis.

[0011] The second gear is connected to the drive shaft and rotates synchronously. The second gear is located below the spray arm body. The second gear meshes with the first gear so that when the spray arm body rotates around the first rotation axis, the second gear and the drive shaft revolve around the first rotation axis and rotate around the second rotation axis, thereby driving the slide plate to reciprocate along the first direction.

[0012] In some embodiments of this application, the drive shaft has an eccentric portion at one end near the slide plate, the eccentric portion being offset from the second rotation axis, the slide plate having an insertion hole, and the eccentric portion being inserted into the insertion hole to couple the drive shaft and the slide plate.

[0013] In some embodiments of this application, the socket extends along a second direction, and an angle is formed between the second direction and the first direction, the angle being greater than 0°. When the drive shaft rotates around the second rotation axis, it drives the slide plate to reciprocate along the first direction through the eccentric portion.

[0014] In some embodiments of this application, the spray arm body is provided with a mounting hole, the drive shaft includes a first shaft segment and a boss portion, the diameter of the boss portion is larger than the diameter of the mounting hole, the boss portion is adapted to abut against the periphery of the mounting hole, and the first shaft segment passes through the mounting hole and is connected to the second gear.

[0015] In some embodiments of this application, the boss portion is provided with the eccentric portion, and the boss portion is located between the spray arm body and the slide plate;

[0016] And / or, the second gear is sleeved on the first shaft segment and the first shaft segment is connected to the fastener, the fastener and the spray arm body axially limit the second gear.

[0017] In some embodiments of this application, the drive shaft and the second gear are coaxially connected via splines;

[0018] And / or, the diameter of the first gear is greater than the diameter of the second gear;

[0019] And / or, the second rotation axis (1620) is parallel to and does not coincide with the first rotation axis (1610).

[0020] In some embodiments of this application, the slide plate is adapted to drive the first nozzle to oscillate reciprocally when it reciprocates along the first direction. The slide plate is provided with a locking hole through which at least a portion of the first nozzle passes to couple the slide plate and the first nozzle.

[0021] In some embodiments of this application, the spray arm body is provided with a connector communicating with the water flow channel, one of the connector and the first nozzle is provided with a spherical cavity to enclose the other, and the other of the connector and the first nozzle is provided with a spherical surface.

[0022] In some embodiments of this application, one of the slide plate and the spray arm body is provided with a sliding protrusion, which is adapted to slide against the other of the slide plate and the spray arm body.

[0023] In some embodiments of this application, the spray arm body is provided with a limiting part, the slide plate is provided with a limiting engagement part, the limiting part and the limiting engagement part restrict each other and can move relative to each other along the first direction.

[0024] In some embodiments of this application, one of the limiting part and the limiting mating part is a limiting buckle and the other is a limiting groove, the limiting buckle is fastened to the limiting groove, and the limiting groove extends along the first direction.

[0025] In some embodiments of this application, the spray arm body is provided with a plurality of first nozzles along the extension direction of the spray arm body, and the slide plate extends along the extension direction of the spray arm body, and the slide plate is adapted to drive the first nozzles on opposite sides of the first rotation axis to move.

[0026] And / or, the first direction is the extension direction of the main body of the spray arm;

[0027] And / or, the spray arm assembly further includes a drive hole, the drive hole being disposed in the spray arm body and communicating with the water flow channel, the drive hole having a constant orientation relative to the spray arm body.

[0028] In some embodiments of this application, the spray arm assembly further includes a water inlet shaft and a spray arm seat. The water inlet shaft is connected to the spray arm body and extends into the spray arm seat. The first gear is fixedly mounted on the spray arm seat. The spray arm body and the water inlet shaft are rotatably configured relative to the first gear and the spray arm seat.

[0029] A second aspect of this application discloses a dishwasher that includes the aforementioned spray arm assembly.

[0030] Other advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description or may be learned by practice of this application. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other designs can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 Side view of the spray arm assembly in some embodiments;

[0033] Figure 2 Cross-sectional views of the spray arm assembly in some embodiments;

[0034] Figure 3 for Figure 2 Enlarged view marked A in the middle;

[0035] Figure 4 for Figure 2 Enlarged view marked B in the middle;

[0036] Figure 5 Exploded views of the spray arm assembly in some embodiments;

[0037] Figure 6 for Figure 5 Enlarged view marked C;

[0038] Figure 7 for Figure 5 Enlarged view marked with D in the middle;

[0039] Figure 8 This is a partial enlarged view of the spray arm assembly in some embodiments;

[0040] Figure 9 The following is a partial enlarged view (top view) of the spray arm assembly in some embodiments;

[0041] Figure 10 This is a schematic diagram of the engagement between the second gear and the drive shaft in some embodiments;

[0042] Figure 11 This is a schematic diagram of the first nozzle in some embodiments;

[0043] Figure 12 This is a schematic diagram of the first nozzle from another perspective in some embodiments.

[0044] Explanation of icon numbers:

[0045] The spray arm assembly 1000, spray arm body 1100, connector 1110, spherical surface 1111, limiting part 1120, mounting hole 1130, sliding protrusion 1140, water inlet end 1150, water flow channel 1160, first nozzle 1210, ball cavity 1211, drive hole 1220, sliding plate 1300, locking hole 1310, limiting mating part 1320, insertion hole 1330, drive mechanism 1400, first gear 1410, second gear 1420, drive shaft 1430, eccentric part 1431, boss part 1432, first shaft section 1433, spline 1434, fastener 1440, water inlet shaft 1500, first rotation axis 1610, second rotation axis 1620, spray arm seat 2000, water outlet 2100.

[0046] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0047] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0048] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0049] In this application, unless otherwise expressly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0050] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. If the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0051] The first aspect of this application discloses a spray arm assembly 1000, combined with... Figures 1 to 5 As shown, the spray arm assembly 1000 includes a spray arm body 1100, a first nozzle 1210, a slide plate 1300, and a drive mechanism 1400. The spray arm body 1100 is adapted to rotate about a first rotation axis 1610, and the spray arm body 1100 is provided with a water flow channel 1160. The first nozzle 1210 is movably disposed on the spray arm body 1100 and communicates with the water flow channel 1160. The slide plate 1300 is mounted on the upper surface of the spray arm body 1100 and can reciprocate relative to the spray arm body 1100 along a first direction. The slide plate 1300 is coupled to the first nozzle 1210. The drive mechanism 1400... The drive mechanism 1400 is installed below the spray arm body 1100. The drive mechanism 1400 includes a drive shaft 1430, which passes through the upper and lower surfaces of the spray arm body 1100 and is coupled to the slide plate 1300. The drive shaft 1430 of the drive mechanism 1400 is adapted to drive the slide plate 1300 to reciprocate along a first direction when the spray arm body 1100 rotates about a first rotation axis 1610. The slide plate 1300 is adapted to drive the first nozzle 1210 to move when it reciprocates along the first direction, so as to change the orientation of the first nozzle 1210 relative to the spray arm body 1100.

[0052] The first nozzle 1210 of the spray arm assembly 1000 is designed to be movable, and by configuring a drive mechanism 1400, when the spray arm body 1100 rotates, the drive mechanism 1400 drives the slide plate 1300 and then drives the first nozzle 1210, so that the first nozzle 1210 moves and changes the orientation of the first nozzle 1210 relative to the spray arm body 1100. This allows the water jet from the first nozzle 1210 to rinse the tableware from different angles, which helps to reduce washing dead corners and improve the washing effect.

[0053] The following section provides a detailed description of the spray arm assembly 1000 in conjunction with a dishwasher. The dishwasher includes an inner tub, a dish rack, a water cup, the spray arm assembly 1000, a circulation pump, and a drain pump.

[0054] The dishwasher's inner drum has a washing chamber (the internal space of the drum) and an opening communicating with it. The dishwasher door can move between an open and closed position; when the door is in the closed position, the opening is closed, and when it is in the open position, the opening is open. The dish rack is installed in the inner drum and can slide in and out of the washing chamber for easy loading and unloading of dishes. The dish rack is usually perforated to allow water to pass through and rinse the dishes. Dishware should be understood as any items that can be washed by a dishwasher, including but not limited to bowls, plates, cups, pots, knives, forks, and chopsticks.

[0055] The spray arm assembly 1000 sprays water to clean the tableware. The spraying of water by the spray arm assembly 1000 is achieved by the operation of a circulation pump. The circulation pump is connected to a water cup, which is located at the bottom of the inner tank for temporary water collection and storage. The circulation pump draws water from the water cup and delivers it to the spray arm assembly 1000. The water flow sprays out from the spray arm assembly 1000 and rinses the tableware before falling back to the bottom of the inner tank and flowing back into the water cup, where it is drawn back by the circulation pump. This forms a washing cycle to clean the tableware.

[0056] After the dishwasher finishes its washing cycle, it needs to drain the water. This is achieved by the operation of a drain pump, which is connected to the water cup. When the drain pump is started, it drains the water from the water cup.

[0057] This embodiment improves the spray arm assembly 1000 to reduce blind spots in the washing process and enhance the cleaning effect. Combined with... Figures 1 to 5 As shown, the spray arm assembly 1000 includes a spray arm body 1100, a first nozzle 1210, a slide plate 1300, and a drive mechanism 1400.

[0058] The rotation of the spray arm assembly 1000 is mainly manifested in the rotation of the spray arm body 1100. The spray arm body 1100 can rotate around the first rotation axis 1610. Similar to related technologies, the rotation of the spray arm body 1100 can be achieved by providing torque through the jet of water. For example, the spray arm assembly 1000 also includes a drive hole 1220, which is disposed in the spray arm body 1100 and communicates with the water flow channel 1160 of the spray arm body 1100. The orientation of the drive hole 1220 relative to the spray arm body 1100 is constant (i.e., the relative position of the drive hole 1220 and the spray arm body 1100 does not change). This ensures that the orientation of the drive hole 1220 relative to the spray arm body 1100 remains unchanged. Water pumped by the circulation pump is delivered to the water flow channel 1160 and can then be sprayed out from the drive hole 1220. The orientation of the drive hole 1220 forms a certain angle with the spray arm body 1100. When the water flows out from the drive hole 1220, it generates torque on the spray arm body 1100, thus driving the spray arm body 1100 to rotate around the first rotation axis 1610. In order to generate a larger torque, the drive hole 1220 used to generate torque can be set at a position on the spray arm body 1100 away from the first rotation axis 1610. It can be understood that in addition to providing torque, the drive hole 1220 can also achieve the rinsing of tableware.

[0059] The first nozzle 1210 is disposed on the spray arm body 1100, so that the first nozzle 1210 can rotate with the spray arm body 1100. The first nozzle 1210 is designed to be movable relative to the spray arm body 1100. The movement of the first nozzle 1210 relative to the spray arm body 1100 includes, but is not limited to, rotation, swinging or reciprocating movement. As long as the position of the first nozzle 1210 relative to the spray arm body 1100 changes, it can be regarded as the first nozzle 1210 moving relative to the spray arm body 1100. When the first nozzle 1210 moves relative to the spray arm body 1100, the orientation of the first nozzle 1210 can change relative to the spray arm body 1100. The movement of the first nozzle 1210 also needs to be coordinated with the slide plate 1300 and the drive mechanism 1400.

[0060] The slide plate 1300 is mounted on the spray arm body 1100, allowing the slide plate 1300 to rotate with the spray arm body 1100. Furthermore, the slide plate 1300 is designed to reciprocate relative to the spray arm body 1100 along a first direction. This first direction can be understood as the extension direction of the spray arm body 1100, which is its length direction. Along this extension direction, the spray arm body 1100 has a long and narrow structure. (See [reference needed]). Figure 1The orientation shown is with the spray arm body 1100 in a stationary state as a reference. The extension direction of the spray arm body 1100 is left and right. At this time, the first direction can be left and right, but of course, the first direction can also be other directions, which will not be listed here. Since the spray arm body 1100 has a certain length, by making the first direction the same as the extension direction of the spray arm body 1100, it is easier for the spray arm body 1100 to support the slide plate 1300, and the slide plate 1300 also has more space to move back and forth.

[0061] The slide plate 1300 is coupled to the first nozzle 1210. This coupling means that the reciprocating movement of the slide plate 1300 acts on the first nozzle 1210, causing the first nozzle 1210 to move accordingly and change its orientation relative to the spray arm body 1100. It is understood that the spray arm assembly 1000 needs to spray water upwards, therefore the first nozzle 1210 needs to be located on the upper surface of the spray arm body 1100. Therefore, in this embodiment, the slide plate 1300 is mounted on the upper surface of the spray arm body 1100 to facilitate its engagement with the first nozzle 1210. Furthermore, since the internal space of the spray arm body 1100 is limited, mounting the slide plate 1300 on the upper surface of the spray arm body 1100 simplifies the structural complexity between the slide plate 1300 and the spray arm body 1100, helping to reduce assembly difficulty.

[0062] The reciprocating movement of the slide plate 1300 along the first direction is achieved in cooperation with the drive mechanism 1400. When the spray arm body 1100 rotates around the first rotation axis 1610, the drive mechanism 1400 acts on the slide plate 1300, thereby driving the slide plate 1300 to reciprocate along the first direction. Since the slide plate 1300 is set on the spray arm body 1100, the slide plate 1300 reciprocates synchronously along the first direction while following the rotation of the spray arm body 1100. The reciprocating movement of the slide plate 1300 along the first direction acts on the first nozzle 1210, thereby causing the first nozzle 1210 to move relative to the spray arm body 1100. The movement of the first nozzle 1210 relative to the spray arm body 1100 means that the orientation of the first nozzle 1210 relative to the spray arm body 1100 changes. That is, the first nozzle 1210 can synchronously change its orientation while following the rotation of the spray arm body 1100. In this way, the water jet from the first nozzle 1210 can rinse the tableware from different angles, which helps to reduce washing dead corners and improve the washing effect.

[0063] The drive mechanism 1400 is installed below the spray arm body 1100. The drive mechanism 1400 includes a drive shaft 1430, which passes through the upper and lower surfaces of the spray arm body 1100 and is coupled to the slide plate 1300. The drive mechanism 1400 drives the slide plate 1300 to reciprocate along a first direction through the drive shaft 1430. The drive mechanism 1400 is installed below the spray arm body 1100 to avoid affecting the water jet. The first gear 1410 is set on the lower surface of the spray arm body 1100 for easy connection and fixation with the spray arm seat 2000. The second gear 1420 is set on the lower surface of the spray arm body 1100 for easy meshing with the first gear 1410. The drive shaft 1430 passes through the upper and lower surfaces of the spray arm body 1100 and is coupled to the slide plate 1300. The coupling means that the rotation of the drive shaft 1430 can act on the slide plate 1300, thereby causing the slide plate 1300 to reciprocate along the first direction, thus driving the reciprocating movement of the slide plate 1300 located on the upper surface of the spray arm body 1100.

[0064] Combination Figure 1 , Figure 2 , Figure 4 and Figure 5 As shown, in some embodiments, the drive mechanism 1400 includes a first gear 1410, a drive shaft 1430, and a second gear 1420. The first gear 1410 is coaxially arranged with the spray arm body 1100 and located below the spray arm body 1100. The spray arm body 1100 is rotatable relative to the first gear 1410 to rotate around a first rotation axis 1610. The second gear 1420 is connected to the drive shaft 1430 and rotates synchronously. The second gear 1420 is located below the spray arm body. The second gear 1420 meshes with the first gear 1410 so that when the spray arm body 1100 rotates around the first rotation axis 1610, the second gear 1420 and the drive shaft 1430 revolve around the first rotation axis 1610 and rotate around the second rotation axis 1620, thereby driving the slide plate 1300 to reciprocate along a first direction.

[0065] Specifically, the first gear 1410 is coaxially arranged with the spray arm body 1100, meaning the center of the first gear 1410 coincides with the first rotation axis 1610. When the spray arm assembly 1000 is assembled, the first gear 1410 is stationary, while the spray arm body 1100 rotates relative to the first gear 1410 as it rotates around the first rotation axis 1610. Since the drive shaft 1430 passes through the upper and lower surfaces of the spray arm body 1100, the second gear 1420 is connected to the drive shaft 1430, enabling the second gear 1420 to mesh with the first gear 1410. Furthermore, the second gear 1420 and the drive shaft 1430 rotate synchronously. Therefore, when the spray arm body 1100 rotates around the first rotation axis 1610, the second gear 1420 and the drive shaft 1430 can rotate around the first rotation axis 1610. The first nozzle 1210 revolves around the first rotation axis 1610, while the second gear 1420 and the drive shaft 1430 rotate around the second rotation axis 1620. The second rotation axis 1620 is parallel to and does not coincide with the first rotation axis 1610. Thus, when the spray arm body 1100 rotates around the first rotation axis 1610, it can continuously drive the second gear 1420 and the drive shaft 1430 to rotate. The drive shaft 1430 acts on the slide plate 1300, thereby continuously changing the orientation of the first nozzle 1210 relative to the spray arm body 1100.

[0066] Combination Figure 5 and Figure 9 As shown, in some embodiments, the drive shaft 1430 has an eccentric portion 1431 at one end near the slide plate 1300. The eccentric portion 1431 is offset from the second rotation axis 1620. The slide plate 1300 has a socket 1330, and the eccentric portion 1431 is inserted into the socket 1330 to couple the drive shaft 1430 and the slide plate 1300. The eccentric portion 1431 acts on the socket 1330, thereby driving the slide plate 1300 to reciprocate.

[0067] For example, the socket 1330 extends along the second direction, that is, the socket 1330 has a long and narrow structure along the second direction (such as the socket 1330 being an oblong hole), and an angle is formed between the second direction and the first direction, the angle being greater than 0°, so that when the drive shaft 1430 rotates around the second rotation axis 1620, it drives the slide plate 1300 to reciprocate along the first direction.

[0068] Since the second direction forms an angle greater than 0° with the first direction, when the drive shaft 1430 rotates around the second rotation axis 1620, it drives the slide plate 1300 to reciprocate along the first direction through the eccentric part 1431. The eccentric part 1431 rotates with the drive shaft and makes a similar eccentric movement relative to the second rotation axis 1620. This allows the eccentric part 1431 to abut against the wall of the insertion hole 1330. The abutment between the eccentric part 1431 and the wall of the insertion hole 1330 generates a component force along the first direction on the slide plate 1300. As the drive shaft 1430 continues to rotate around the second rotation axis 1620, the two side walls of the insertion hole 1330 along the first direction are alternately abutted by the eccentric part 1431, thus driving the slide plate 1300 to reciprocate along the first direction. It is understandable that during the reciprocating movement of the slide plate 1300 along the first direction, the eccentric part 1431 moves relative to the socket 1330 in the second direction within the socket 1330. Therefore, the length of the socket 1330 extending along the second direction needs to provide sufficient room for movement for the eccentric part 1431. The length of the socket 1330 extending along the second direction can be determined according to actual testing or structural layout.

[0069] Optionally, the second direction is perpendicular to the first direction. This maximizes the force generated by the eccentric portion 1431 abutting against the wall of the insertion hole 1330, which is more conducive to the reciprocating movement of the slide plate 1300 along the first direction. See also... Figure 1 and Figure 9 The orientation shown is with the spray arm body 1100 in a stationary state as a reference. The first direction is the left-right direction, that is, the extension / length direction of the spray arm body 1100. The second direction is the front-back direction, that is, the width direction of the spray arm body 1100. Assuming that the second gear 1420 rotates counterclockwise and alternately abuts against the right and left sides of the hole wall of the insertion hole 1330, when the eccentric part 1431 abuts against the right side of the hole wall of the insertion hole 1330, it can drive the slide plate 1300 to move to the right. When the eccentric part 1431 abuts against the left side of the hole wall of the insertion hole 1330, it can drive the slide plate 1300 to move to the left. The eccentric part 1431 generates the largest component force along the first direction on the slide plate 1300, which is more conducive to the transmission of power.

[0070] Combination Figure 5 and Figure 10 As shown, in some embodiments, the spray arm body 1100 is provided with a mounting hole 1130, and the drive shaft 1430 includes a first shaft segment 1433 and a boss portion 1432. The diameter of the boss portion 1432 is larger than the diameter of the mounting hole 1130, and the boss portion 1432 is adapted to abut against the periphery of the mounting hole 1130. The first shaft segment 1433 passes through the mounting hole 1130 and is connected to the second gear 1420.

[0071] In this embodiment, the eccentric portion 1431 is provided on the boss portion 1432. That is, along the top-to-bottom direction, the eccentric portion 1431, the boss portion 1432 and the first shaft segment 1433 are arranged in sequence. When the drive shaft 1430 is inserted into the mounting hole 1130, the first shaft segment 1433 passes through the mounting hole 1130. The diameter of the boss portion 1432 is larger than the diameter of the mounting hole 1130. In this way, the boss portion 1432 can abut against the periphery of the mounting hole 1130, realizing the initial positioning and installation of the drive shaft 1430. After the first shaft segment 1433 passes through the mounting hole 1130, it needs to be connected to the second gear 1420. In this way, the drive shaft 1430 and the second gear 1420 can be axially (axially) limited to the spray arm body 1100.

[0072] For example, the second gear 1420 is sleeved on the first shaft segment 1433, and the first shaft segment 1433 is connected to the fastener 1440. The fastener 1440 and the spray arm body 1100 axially limit the second gear 1420. Specifically, the connection between the first shaft segment 1433 and the second gear 1420 is such that the first shaft segment 1433 passes through the second gear 1420. The portion of the first shaft segment 1433 exposed on the side of the second gear 1420 away from the spray arm body 1100 needs to be connected to the fastener 1440. The fastener 1440 axially limits the second gear 1420. That is, the fastener 1440, together with the boss portion 1432, installs the drive shaft 1430 and the second gear 1420 onto the spray arm body 1100.

[0073] Optionally, the boss portion 1432 is provided with an eccentric portion 1431, and the boss portion 1432 is located between the spray arm body 1100 and the slide plate 1300 to prevent the boss portion 1432 from affecting the movement of the slide plate 1300 and to facilitate the insertion of the eccentric portion 1431 into the insertion hole 1330.

[0074] Optionally, the drive shaft 1430 and the second gear 1420 are coaxially connected via a spline 1434. For example, the end of the first shaft segment 1433 forms a spline 1434, which passes through a hole in the second gear 1420 (the hole being a shape that mates with the spline 1434). This achieves both coaxial connection and rotation of the drive shaft 1430. The fastener 1440 can be a retaining ring structure to axially limit the movement of the second gear 1420.

[0075] Optionally, the diameter of the first gear 1410 is larger than the diameter of the second gear 1420, so that the second gear 1420 rotates at a higher speed, which is more conducive to controlling the movement of the first nozzle 1210 at a suitable and faster frequency, thereby improving the cleaning effect.

[0076] Combination Figure 1 , Figure 2 and Figure 3As shown, in some embodiments, the slide plate 1300 is adapted to drive the first nozzle 1210 to oscillate back and forth when it reciprocates along the first direction. That is, the slide plate 1300 drives the first nozzle 1210, and the specific form of the movement of the first nozzle 1210 is that the first nozzle 1210 oscillates relative to the spray arm body 1100. Since the movement of the slide plate 1300 relative to the spray arm body 1100 is a reciprocating movement, it is beneficial to simplify the coupling structure between the slide plate 1300 and the first nozzle 1210 by driving the slide plate 1300 to oscillate back and forth, without the need to set up a more complex structure to convert the reciprocating movement into other forms of movement. When the first nozzle 1210 oscillates back and forth, the water flow sprayed by the first nozzle 1210 also oscillates back and forth, thereby changing the spray angle of the water flow and improving the cleaning effect.

[0077] For example, combining Figures 2 to 6 As shown, the slide plate 1300 is provided with a locking hole 1310, and the first nozzle 1210 is at least partially inserted through the locking hole 1310, thus achieving coupling between the slide plate 1300 and the first nozzle 1210. Since the first nozzle 1210 is at least partially inserted through the locking hole 1310, it can be exposed relative to the slide plate 1300, allowing it to spray water without being obstructed by the slide plate 1300. When the slide plate 1300 reciprocates along the first direction, the locking hole 1310 acts on the first nozzle 1210, thereby causing the first nozzle 1210 to oscillate reciprocally. See also... Figure 1 and Figure 3 The orientation shown is with the spray arm body 1100 in a stationary state as a reference. The first direction is the left-right direction. When the slide plate 1300 moves along the first direction to the left, the slide plate 1300 pushes the first nozzle 1210 to swing to the left. When the slide plate 1300 moves along the first direction to the right, the slide plate 1300 pushes the first nozzle 1210 to swing to the right. With the spray arm body 1100 in a rotating state as a reference, and the first direction being in the same direction as the extension direction of the spray arm body 1100, the slide plate 1300 reciprocates along the first direction, thereby allowing the first nozzle 1210 to swing away from the first rotation axis 1610 and swing towards the first rotation axis 1610.

[0078] The movement of the first nozzle 1210 can be achieved in the following manner, combined with Figures 2 to 7 as well as Figure 11 , Figure 12As shown, in some embodiments, the spray arm body 1100 is provided with a connector 1110 communicating with the water flow channel 1160. One of the connector 1110 and the first nozzle 1210 is provided with a spherical cavity 1211 to enclose the other, and the other of the connector 1110 and the first nozzle 1210 is provided with a spherical surface 1111. Specifically, the connector 1110 may enclose the first nozzle 1210, or the first nozzle 1210 may enclose the connector 1110. When the connector 1110 and the first nozzle 1210 are assembled together, the first nozzle 1210 communicates with the connector 1110, and then with the water flow channel 1160. Taking the example of the first nozzle 1210 wrapping around the connector 1110, the first nozzle 1210 has a spherical cavity 1211, and the connector 1110 has a spherical surface 1111. When the first nozzle 1210 wraps around the connector 1110, the connector 1110 is located in the spherical cavity 1211. The cooperation between the spherical surface 1111 and the cavity wall of the spherical cavity 1211 allows the first nozzle 1210 to move relative to the connector 1110 (this movement is similar to rotation). Furthermore, the cooperation between the spherical surface 1111 and the cavity wall of the spherical cavity 1211 also achieves a seal between the first nozzle 1210 and the connector 1110, reducing water leakage between them. Similarly, the connector 1110 wrapping around the first nozzle 1210 has a similar technical effect, which will not be repeated here.

[0079] Since the slide plate 1300 needs to reciprocate relative to the spray arm body 1100 along the first direction, in order to reduce the resistance between the slide plate 1300 and the spray arm body 1100, combined with Figures 5 to 7 As shown, one of the slide plate 1300 and the spray arm body 1100 is provided with a sliding protrusion 1140, which is adapted to slide against the other of the slide plate 1300 and the spray arm body 1100. For example, the upper surface of the spray arm body 1100 is provided with the sliding protrusion 1140. When the slide plate 1300 reciprocates along the first direction, it can slide against the sliding protrusion 1140, thus reducing the contact area between the slide plate 1300 and the spray arm body 1100, which helps to reduce frictional resistance and makes the reciprocating movement of the slide plate 1300 smoother, thereby better driving the first nozzle 1210. It can be understood that the sliding protrusion 1140 can also be provided on the slide plate 1300.

[0080] Combination Figures 5 to 8As shown, in some embodiments, the spray arm body 1100 is provided with a limiting part 1120, and the slide plate 1300 is provided with a limiting mating part 1320. The limiting part 1120 and the limiting mating part 1320 mutually restrict each other and can move relative to each other along a first direction. The mutual restriction between the limiting part 1120 and the limiting mating part 1320 means that after the slide plate 1300 and the spray arm body 1100 are assembled together, and under the interaction of the limiting part 1120 and the limiting mating part 1320, the slide plate 1300 and the spray arm body 1100... The spray arm body 1100 cannot be completely separated. At the same time, under the mutual restriction of the limiting part 1120 and the limiting engagement part 1320, the limiting part 1120 and the limiting engagement part 1320 can move relative to each other in the first direction. This guides the reciprocating movement of the slide plate 1300 in the first direction, so that the slide plate 1300 can reciprocate in the first direction under the guidance of the limiting part 1120 and the limiting engagement part 1320 under the action of the drive mechanism 1400.

[0081] Optionally, one of the limiting part 1120 and the limiting mating part 1320 is a limiting buckle and the other is a limiting groove. The limiting buckle is fastened to the limiting groove, and the limiting groove extends along the first direction. With this arrangement, it is easier to achieve mutual restriction and relative movement between the limiting part 1120 and the limiting mating part 1320.

[0082] For example, taking the limiting part 1120 as a limiting buckle and the limiting mating part 1320 as a limiting groove as an example, when the slide plate 1300 is assembled to the spray arm body 1100, the limiting groove is aligned with the limiting buckle and pressed until the limiting buckle is engaged with the limiting groove. In this way, the limiting buckle and the limiting groove mutually restrict each other, and the assembly of the slide plate 1300 and the spray arm body 1100 is completed. The slide plate 1300 cannot be completely separated from the spray arm body 1100. At the same time, the limiting groove extends along the first direction, that is, the limiting groove has a long and narrow structure along the first direction (such as the limiting groove is an oblong hole). The limiting buckle can move relative to the limiting groove along the first direction. That is, when the slide plate 1300 moves back and forth along the first direction, the limiting buckle also moves back and forth relative to the limiting groove along the first direction. In this way, the assembly of the slide plate 1300 and the spray arm body 1100 can be guaranteed, and the reciprocating movement of the slide plate 1300 can also be guided.

[0083] Combination Figures 1 to 5 As shown, in some embodiments, the spray arm body 1100 is provided with a plurality of first nozzles 1210 along the extending direction of the spray arm body 1100, and a slide plate 1300 extends along the extending direction of the spray arm body 1100. The slide plate 1300 is adapted to drive the first nozzles 1210 on opposite sides of the first rotation axis 1610 to move. For example, combined with Figure 1The orientation shown is with the spray arm body 1100 in a stationary state as a reference. The spray arm body 1100 extends in the left and right direction. Multiple first nozzles 1210 are respectively provided on the left and right sides of the first rotation axis 1610. Under the drive of the drive mechanism 1400, the slide plate 1300 can drive the multiple first nozzles 1210 on the left and right sides of the first rotation axis 1610 to move, so that the multiple first nozzles 1210 on the left and right sides of the first rotation axis 1610 move to achieve the superposition of angle changes, further improving the cleaning effect. It is not necessary to set corresponding slide plates 1300 for the multiple first nozzles 1210 on the left and right sides of the first rotation axis 1610, which helps to reduce the number of parts and thus reduce the assembly difficulty.

[0084] For example, combining Figure 1 and Figure 5 The orientation shown is with the spray arm body 1100 in a stationary state as a reference. The spray arm body 1100 extends in the left-right direction. A first nozzle 1210 (which can be one or more, meaning two or more) is located on the left side of the first rotation axis 1610, and a first nozzle 1210 (which can be one or more, meaning two or more) is also located on the right side of the first rotation axis 1610. The slide plate 1300 extends in the left-right direction for a certain length, and the slide plate 1300 has a nozzle located on the first rotation axis 1610. The left half of the left side of the slide plate 1300 is coupled to the right half of the slide plate 1300 located on the right side of the first rotation axis 1610. The left half of the slide plate 1300 is coupled to the first nozzle 1210 located on the left side of the first rotation axis 1610, and the right half of the slide plate 1300 is coupled to the first nozzle 1210 located on the right side of the first rotation axis 1610. When the drive mechanism 1400 drives the slide plate 1300 to reciprocate along the first direction, the left and right halves of the slide plate 1300 reciprocate synchronously, thereby driving the first nozzles 1210 on both sides (opposite sides) to move, thus enabling the first nozzles 1210 on both sides to move. Optionally, the slide plate 1300 can be designed as a one-piece molded part, which can further reduce the number of parts and further help reduce the assembly difficulty of the spray arm assembly 1000, such as the left and right halves of the slide plate 1300 mentioned above being one-piece molded.

[0085] Combination Figure 5 In some embodiments, the number of second gears 1420 is one. Since the slide plate 1300 moves back and forth along the first direction to drive the first nozzle 1210, the cooperation between the second gear 1420 and the slide plate 1300 allows the slide plate 1300 to drive all the first nozzles 1210 even when the number of second gears 1420 is designed to be one. This helps to reduce the number of parts and thus reduce the assembly difficulty.

[0086] The spray arm assembly 1000 also includes a water inlet shaft 1500 and a spray arm base 2000. The water inlet shaft 1500 is connected to the spray arm body 1100 and extends into the spray arm base 2000. The first gear 1410 is fixedly installed on the spray arm base 2000. The spray arm body 1100 and the water inlet shaft 1500 are rotatably configured relative to the first gear 1410 and the spray arm base 2000. Specifically, the spray arm body 1100 has a water inlet end 1150, and a first gear 1410 is sleeved on the water inlet end 1150 of the spray arm body 1100. The first gear 1410 and the water inlet end 1150 of the spray arm body 1100 can rotate relative to each other (relative rotation, after the spray arm body 1100 is installed on the spray arm seat 2000, the first gear 1410 remains stationary, and the spray arm body 1100 rotates). The water inlet shaft 1500 and the water inlet end 1150 of the spray arm body 1100 are fixedly connected (such as by means of a rotating buckle), so that the water flow channel 1160 and the water inlet shaft 1500 are connected. Install the spray arm body 1100 onto the spray arm base 2000. If the water inlet shaft 1500 is aligned with the water outlet 2100 of the spray arm base 2000, insert it into the water outlet 2100 from top to bottom (install the spray arm body 1100 onto the spray arm base 2000 from top to bottom). The first gear 1410 is fixedly connected to the spray arm base 2000 (e.g., through a snap-fit ​​connection). At this time, the spray arm base 2000 is connected to the water flow channel 1160, and the water flow can enter the water flow channel 1160 from the spray arm base 2000.

[0087] The water pumped by the circulating pump is delivered to the spray arm base 2000 and then enters the water flow channel 1160 of the spray arm body 1100. The water flow is ejected from the first nozzle 1210 and the drive hole 1220. The water flow ejected from the drive hole 1220 can provide torque to make the spray arm body 1100 rotate. Since the first gear 1410 is fixedly connected to the spray arm base 2000 and remains stationary, when the spray arm body 1100 rotates around the first rotation axis 1610, the second gear 1420 and the drive shaft 1430 revolve around the first rotation axis 1610 and rotate around the second rotation axis 1620, thereby driving the slide plate 1300 to move back and forth.

[0088] The second aspect of this application discloses a dishwasher, which includes the spray arm assembly 1000 described above. It is understood that the spray arm assembly 1000 of the dishwasher in this embodiment adopts the technical solution of the above embodiment, and therefore has at least the beneficial effects brought by the technical solution of the above embodiment, which will not be repeated here.

[0089] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the concept of this application and the contents of the specification and drawings of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A spray arm assembly (1000), characterized in that, include: The spray arm body (1100) is adapted to rotate about a first rotation axis (1610), and the spray arm body (1100) is provided with a water flow channel (1160); The first nozzle (1210) is movably disposed on the spray arm body (1100) and communicates with the water flow channel (1160); A sliding plate (1300) is fitted onto the upper surface of the spray arm body (1100) and is reciprocating relative to the spray arm body (1100) in a first direction; the sliding plate (1300) is coupled to the first nozzle (1210); and A drive mechanism (1400) is installed below the spray arm body (1100). The drive mechanism (1400) includes a drive shaft (1430) that passes through the upper and lower surfaces of the spray arm body (1100) and is coupled to the slide plate (1300). The drive shaft (1430) of the drive mechanism (1400) is adapted to drive the slide plate (1300) to reciprocate along the first direction when the spray arm body (1100) rotates about the first rotation axis (1610). The slide plate (1300) is adapted to drive the first nozzle (1210) to move when it reciprocates along the first direction, so as to change the orientation of the first nozzle (1210) relative to the spray arm body (1100).

2. The spray arm assembly (1000) as claimed in claim 1, characterized in that, The drive mechanism (1400) includes: The first gear (1410) is coaxially arranged with the spray arm body (1100) and located below the spray arm body (1100). The spray arm body (1100) is rotatable relative to the first gear (1410) to rotate about the first rotation axis (1610). The second gear (1420) is connected to the drive shaft (1430) and rotates synchronously. The second gear (1420) is located below the spray arm body (1100). The second gear (1420) meshes with the first gear (1410) so that when the spray arm body (1100) rotates around the first rotation axis (1610), the second gear (1420) and the drive shaft (1430) revolve around the first rotation axis (1610) and rotate around the second rotation axis (1620), thereby driving the slide plate (1300) to reciprocate along the first direction.

3. The spray arm assembly (1000) as described in claim 2, characterized in that, The drive shaft (1430) has an eccentric portion (1431) at one end near the slide plate (1300). The eccentric portion (1431) is offset from the second rotation axis (1620). The slide plate (1300) has a socket (1330). The eccentric portion (1431) is inserted into the socket (1330) to couple the drive shaft (1430) and the slide plate (1300).

4. The spray arm assembly (1000) as described in claim 3, characterized in that, The insertion hole (1330) extends along a second direction, and an angle is formed between the second direction and the first direction, the angle being greater than 0°. When the drive shaft (1430) rotates around the second rotation axis (1620), it drives the slide plate (1300) to reciprocate along the first direction through the eccentric part (1431).

5. The spray arm assembly (1000) as described in claim 3, characterized in that, The spray arm body (1100) is provided with a mounting hole (1130). The drive shaft (1430) includes a first shaft segment (1433) and a boss portion (1432). The diameter of the boss portion (1432) is larger than the diameter of the mounting hole (1130). The boss portion (1432) is adapted to abut against the periphery of the mounting hole (1130). The first shaft segment (1433) passes through the mounting hole (1130) and is connected to the second gear (1420).

6. The spray arm assembly (1000) as described in claim 5, characterized in that, The boss portion (1432) is provided with the eccentric portion (1431), and the boss portion (1432) is located between the spray arm body (1100) and the slide plate (1300); And / or, the second gear (1420) is sleeved on the first shaft segment (1433) and the first shaft segment (1433) is connected to the fastener (1440), the fastener (1440) and the spray arm body (1100) axially limit the second gear (1420).

7. The spray arm assembly (1000) as claimed in claim 2, characterized in that, The drive shaft (1430) and the second gear (1420) are coaxially connected by a spline (1434); And / or, the diameter of the first gear (1410) is larger than the diameter of the second gear (1420); And / or, the second rotation axis (1620) is parallel to and does not coincide with the first rotation axis (1610).

8. The spray arm assembly (1000) as claimed in claim 1, characterized in that, The slide plate (1300) is adapted to drive the first nozzle (1210) to swing back and forth when it moves back and forth along the first direction; The slide plate (1300) is provided with a locking hole (1310), through which at least a portion of the first nozzle (1210) passes to couple the slide plate (1300) and the first nozzle (1210).

9. The spray arm assembly (1000) as claimed in claim 8, characterized in that, The main body of the spray arm (1100) is provided with a connector (1110) communicating with the water flow channel (1160). One of the connector (1110) and the first nozzle (1210) is provided with a ball cavity (1211) to enclose the other. The other of the connector (1110) and the first nozzle (1210) is provided with a spherical surface (1111).

10. The spray arm assembly (1000) as claimed in claim 1, characterized in that, Along the extending direction of the spray arm body (1100), the spray arm body (1100) is provided with a plurality of first nozzles (1210), and the slide plate (1300) extends along the extending direction of the spray arm body (1100). The slide plate (1300) is adapted to drive the first nozzles (1210) on both sides of the first rotation axis (1610) to move. And / or, the first direction is the extension direction of the spray arm body (1100); And / or, the spray arm assembly (1000) further includes a drive hole (1220) disposed on the spray arm body (1100) and communicating with the water flow channel (1160), the drive hole (1220) having a constant orientation relative to the spray arm body (1100).

11. The spray arm assembly (1000) as claimed in claim 2, characterized in that, The spray arm assembly (1000) further includes a water inlet shaft (1500) and a spray arm seat (2000). The water inlet shaft (1500) is connected to the spray arm body (1100) and extends into the spray arm seat (2000). The first gear (1410) is fixedly mounted on the spray arm seat (2000). The spray arm body (1100) and the water inlet shaft (1500) are rotatably configured relative to the first gear (1410) and the spray arm seat (2000).

12. A dishwasher, characterized in that, Includes the spray arm assembly (1000) as described in any one of claims 1 to 11.

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