Spray arm assembly and dishwasher

Abstract

The application discloses a spray arm assembly and a dishwasher. The spray arm assembly comprises a spray arm body, a first nozzle, a sliding plate and a driving mechanism. The spray arm body is adapted to rotate around a first rotation axis and is provided with a water flow channel. The first nozzle is movably arranged on the spray arm body and is communicated with the water flow channel. The sliding plate is assembled on the spray arm body and is adapted to reciprocally move relative to the spray arm body. The sliding plate is adapted to drive the first nozzle to move when reciprocally moving relative to the spray arm body, so that the orientation of the first nozzle relative to the spray arm body is changed. The driving mechanism comprises an input gear and an output gear. The spray arm body is adapted to rotate around the first rotation axis relative to the input gear. The output gear is arranged on the spray arm body and is drivingly connected with the input gear. When the spray arm body rotates around the first rotation axis, the output gear revolves around the first rotation axis and rotates, so as to drive the sliding plate to reciprocally move. The input gear to the output gear forms at least two stages of speed reduction transmission. The application has good cleaning effect and can reduce the risk of stopping rotating.

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 in 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, comprising: 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; The first nozzle is movably mounted on the spray arm body and communicates with the water flow channel; A sliding plate, fitted to the spray arm body and reciprocating relative to the spray arm body, is adapted to move the first nozzle during reciprocating movement relative to the spray arm body, thereby changing the orientation of the first nozzle relative to the spray arm body; and The drive mechanism includes an input gear and an output gear. The spray arm body is adapted to rotate relative to the input gear about the first rotation axis. The output gear is located on the spray arm body and is connected to the input gear in a transmission manner. When the spray arm body rotates about the first rotation axis, the output gear revolves around the first rotation axis and rotates on its own axis to drive the slide plate to reciprocate. The input gear to the output gear form at least two stages of speed reduction transmission.

[0005] In some embodiments of this application, the drive mechanism further includes at least one intermediate gear disposed between the input gear and the output gear for transmission. The intermediate gear includes a first gear section and a second gear section that are coaxial and rotate synchronously. The number of teeth of the first gear section is greater than the number of teeth of the second gear section. The first gear section meshes with the preceding gear, and the second gear section meshes with the following gear.

[0006] In some embodiments of this application, the slide plate is mounted on the outer surface of the spray arm body, and the input gear, the intermediate gear and the output gear are disposed between the spray arm body and the slide plate.

[0007] In some embodiments of this application, the input gear is located below the slide plate, and the slide plate is provided with a clearance hole. The spray arm assembly includes a connecting seat, one end of which is adapted to pass through the clearance hole and be fixedly connected to the input gear, and the other end of which is adapted to be fixedly connected to the water supply pipe.

[0008] In some embodiments of this application, the connecting seat and the input gear are fixedly connected and sleeved on the water inlet end of the spray arm body. The spray arm assembly includes a locking block, which is fixedly connected to the water inlet end to limit the input gear and the connecting seat between the locking block and the spray arm body. The connecting seat is adapted to be fixedly connected to the water outlet end of the water supply pipe to make the water supply pipe and the water inlet end of the spray arm body communicate.

[0009] In some embodiments of this application, the connecting seat is provided with a slot, the input gear is provided with a pin, and the pin and the slot are adapted to be inserted into each other axially along the first rotation axis to limit each other circumferentially along the first rotation axis.

[0010] In some embodiments of this application, the output gear is adapted to rotate about a second rotation axis, the output gear is provided with an eccentric portion, the eccentric portion is offset from the second rotation axis, the slide plate is provided with a socket, the eccentric portion is inserted into the socket, and the output gear is adapted to drive the slide plate to reciprocate by the cooperation of the eccentric portion and the socket when rotating about the second rotation axis.

[0011] In some embodiments of this application, the extending direction of the socket and the reciprocating movement direction of the slide are perpendicular to each other.

[0012] In some embodiments of this application, the slide plate is provided with a locking hole, and the first nozzle is at least partially inserted through the locking hole. The slide plate is adapted to drive the first nozzle to swing back and forth during reciprocating movement. And / or, the spray arm body is provided with a connector that communicates with the water flow channel, and the first nozzle and the connector are spherically connected.

[0013] In some embodiments of this application, the spray arm body forms an upwardly open cavity, and the slide plate is disposed in the cavity.

[0014] In some embodiments of this application, the input gear and the spray arm body are coaxially arranged; And / or, the slide plate can reciprocate along the extension direction of the spray arm body.

[0015] A second aspect of this application discloses a dishwasher that includes the aforementioned spray arm assembly.

[0016] In this application's technical solution, the first nozzle is designed to be movable. When the spray arm body rotates around the first rotation axis, a drive mechanism drives a sliding plate, thereby moving the first nozzle and changing its orientation relative to the spray arm body. This allows the water jet from the first nozzle to wash the dishes from different angles, helping to reduce blind spots and improve cleaning effectiveness. Simultaneously, by improving the drive mechanism, at least two stages of reduction gear transmission are implemented between the input and output gears. This amplifies torque, easily generating greater force to ensure the first nozzle's movement and reduces the risk of the spray arm body stopping.

[0017] 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

[0018] 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.

[0019] Figure 1 Side view of the spray arm assembly in some embodiments; Figure 2 Exploded views of the spray arm assembly in some embodiments; Figure 3 This is a schematic diagram of a partial structure of the skateboard in some embodiments; Figure 4 These are schematic diagrams of partial structures of the spray arm body in some embodiments; Figure 5 These are schematic diagrams of the drive mechanism in some embodiments; Figure 6 This is another schematic diagram of the drive mechanism in some embodiments; Figure 7 This is a schematic diagram of the input gear in some embodiments; Figure 8 This is a schematic diagram of the connector in some embodiments; Figure 9 This is a schematic diagram of a skateboard in some embodiments; Figure 10 This is a schematic diagram of the first nozzle in some embodiments.

[0020] Explanation of icon numbers: The spray arm body 100, water inlet end 110, sliding protrusion 120, limiting part 130, connector 140, spherical surface 141, support column 150, cavity 160, first nozzle 210, ball cavity 211, drive hole 220, slide plate 300, clearance hole 310, locking hole 320, limiting mating part 330, insertion hole 340, drive mechanism 400, input gear 410, slot 411, intermediate gear 420, first gear part 421, second gear part 423, output gear 430, eccentric part 431, connecting seat 500, pin 510, gasket 600, locking block 700, first rotation axis 810, second rotation axis 820.

[0021] 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

[0022] 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.

[0023] 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.

[0024] 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.

[0025] 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.

[0026] The first aspect of this application discloses a spray arm assembly, which in some embodiments is combined with Figures 1 to 6 As shown, the spray arm assembly includes a spray arm body 100, a first nozzle 210, a sliding plate 300, and a drive mechanism 400. The spray arm body 100 is adapted to rotate about a first rotation axis 810, and the spray arm body 100 is provided with a water flow channel. The first nozzle 210 is movably disposed on the spray arm body 100 and communicates with the water flow channel. The sliding plate 300 is assembled to the spray arm body 100 and can reciprocate relative to the spray arm body 100. The sliding plate 300 is adapted to drive the first nozzle 210 to move when reciprocating relative to the spray arm body 100, so that the first nozzle 210 moves relative to the spray arm body 100. The orientation of the arm body 100 changes. The drive mechanism 400 includes an input gear 410 and an output gear 430. The spray arm body 100 is adapted to rotate relative to the input gear 410 about a first rotation axis 810. The output gear 430 is located on the spray arm body 100 and is connected to the input gear 410 in a transmission manner. When the spray arm body 100 rotates about the first rotation axis 810, the output gear 430 revolves around the first rotation axis 810 and rotates on its own axis to drive the slide plate 300 to move back and forth. The input gear 410 to the output gear 430 form at least two stages of reduction transmission.

[0027] In this embodiment, the first nozzle 210 is designed to be movable. When the spray arm body 100 rotates around the first rotation axis 810, the drive mechanism 400 drives the slide plate 300, thereby moving the first nozzle 210. This changes the orientation of the first nozzle 210 relative to the spray arm body 100, allowing the water jet from the first nozzle 210 to wash the dishes from different angles, helping to reduce blind spots and improve cleaning effect. At the same time, by improving the drive mechanism 400, at least two-stage reduction transmission is achieved between the input gear 410 and the output gear 430. This amplifies the torque, making it easier to generate greater force, ensuring the movement of the first nozzle 210 and reducing the risk of the spray arm body 100 stopping.

[0028] Specifically, the spray arm body 100 can rotate around the first rotation axis 810. Similar to related technologies, the rotation of the spray arm body 100 can be achieved by providing torque through the jet of water. For example, the spray arm assembly includes a drive hole 220, which is disposed in the spray arm body 100 and communicates with the water flow channel of the spray arm body 100. The orientation of the drive hole 220 relative to the spray arm body 100 is constant (i.e., the relative position of the drive hole 220 and the spray arm body 100 does not change), thus ensuring that the drive hole 220 relative to the spray arm body 100 remains constant. (With the spray arm body 100 maintaining its orientation), water pumped by the washing pump is delivered to the water flow channel and then sprayed out from the drive hole 220. The drive hole 220 is oriented at a certain angle to the spray arm body 100. When the water flows out from the drive hole 220, it generates torque on the spray arm body 100, thus causing the spray arm body 100 to rotate around the first rotation axis 810. To generate a larger torque, the drive hole 220 for generating torque can be located at a position on the spray arm body 100 away from the first rotation axis 810. In some cases, in addition to providing torque, the drive hole 220 can also achieve a certain degree of rinsing of tableware.

[0029] The first nozzle 210 is disposed on the spray arm body 100, so that it can rotate with the spray arm body 100. The first nozzle 210 is connected to the water flow channel. Water pumped by the washing pump is delivered to the water flow channel and then sprayed out from the first nozzle 210 to rinse the tableware. The number of first nozzles 210 can be set according to actual needs. For example, the number of first nozzles 210 can be multiple (multiple means two or more). Multiple first nozzles 210 are arranged alternately along the length of the spray arm body 100. The first nozzle 210 is movable relative to the spray arm body 100. The movement of the first nozzle 210 includes, but is not limited to, rotation, swinging, or reciprocating movement. As long as the position of the first nozzle 210 relative to the spray arm body 100 changes, it can be regarded as the first nozzle 210 moving relative to the spray arm body 100. Through the movement of the first nozzle 210 relative to the spray arm body 100, the orientation of the first nozzle 210 relative to the spray arm body 100 can be changed, that is, the direction of the water flow sprayed by the first nozzle 210 can be changed.

[0030] The movement of the first nozzle 210 relative to the spray arm body 100 requires the spray arm body 100 to rotate around the first rotation axis 810 in conjunction with the sliding plate 300. The sliding plate 300 is mounted on the spray arm body 100, so that the sliding plate 300 can rotate with the spray arm body 100, and the sliding plate 300 is designed to reciprocate relative to the spray arm body 100. For example, the sliding plate 300 can reciprocate along the extension direction of the spray arm body 100, although the reciprocating direction of the sliding plate 300 can also be other directions. Since the spray arm body 100 has a certain length, the reciprocating direction of the sliding plate 300 is in the same direction as the extension direction of the spray arm body 100, which makes it easier for the spray arm body 100 to support the sliding plate 300, and the sliding plate 300 also has more space for reciprocating movement.

[0031] The reciprocating movement of the slide plate 300 is achieved through cooperation with the drive mechanism 400. When the spray arm body 100 rotates around the first rotation axis 810, the drive mechanism 400 acts on the slide plate 300, thereby driving the slide plate 300 to reciprocate. Since the slide plate 300 is assembled to the spray arm body 100, the slide plate 300 reciprocates synchronously relative to the spray arm body 100 as it rotates with it. The reciprocating movement of the slide plate 300 acts on the first nozzle 210, so that the first nozzle 210 moves relative to the spray arm body 100 as it rotates. The movement of the first nozzle 210 relative to the spray arm body 100 means that the orientation of the first nozzle 210 relative to the spray arm body 100 changes. That is, the first nozzle 210 can synchronously change its orientation to swing as it rotates with the spray arm body 100. In this way, the water jet from the first nozzle 210 can rinse the tableware from different angles, which helps to reduce washing dead corners and improve the cleaning effect.

[0032] In order to drive the slide plate 300 to reciprocate, the drive mechanism 400 includes an input gear 410 and an output gear 430. The spray arm body 100 is adapted to rotate relative to the input gear 410 about a first rotation axis 810. The output gear 430 is located on the spray arm body 100 and is connected to the input gear 410 in a transmission manner. When the spray arm body 100 rotates about the first rotation axis 810, the output gear 430 revolves around the first rotation axis 810 and rotates on its own axis, so as to drive the slide plate 300 to reciprocate.

[0033] When the spray arm assembly is completed, the input gear 410 is stationary. The spray arm body 100 rotates relative to the input gear 410 as it rotates around the first rotation axis 810. Since the output gear 430 is located on the spray arm body 100, it rotates along with the spray arm body 100 and revolves around the first rotation axis 810. Because the input gear 410 is stationary and the input gear 410 and output gear 430 are connected by a transmission, the output gear 430 rotates on its own axis while revolving around the first rotation axis 810. This rotation of the output gear 430 drives the slide plate 300 to reciprocate. Therefore, as the spray arm body 100 continuously rotates, the output gear 430 also continuously rotates. This continuous rotation of the output gear 430 drives the slide plate 300 to continuously reciprocate relative to the spray arm body 100, thereby continuously changing the orientation of the first nozzle 210 relative to the spray arm body 100.

[0034] Since the first nozzle 210 is movably mounted on the spray arm body 100 and needs to be connected to the water flow channel, if the connection between the first nozzle 210 and the spray arm body 100 is too loose, water leakage is likely to occur, leading to a decrease in water pressure and a reduction in the spraying effect of the first nozzle 210, thus affecting the cleaning effect. If the connection between the first nozzle 210 and the spray arm body 100 is too tight, the slide plate 300 will not be able to easily drive the first nozzle 210 to move, which may cause the spray arm body 100 to stop rotating. Therefore, in this embodiment, the input gear 410 to the output gear 430 form at least two stages of reduction transmission. In this way, the torque is amplified from the input gear 410 to the output gear 430. Compared with the case where the input gear 410 and the output gear 430 are directly meshed, the force generated on the slide plate 300 in this embodiment is relatively greater, which can reduce the risk of the spray arm body 100 stopping. Furthermore, based on this, the gap at the mating connection between the first nozzle 210 and the spray arm body 100 can be appropriately reduced (i.e., the mating connection between the first nozzle 210 and the spray arm body 100 can be appropriately tightened). While ensuring the movement of the first nozzle 210, leakage can be reduced, water pressure can be guaranteed, and cleaning effect can be guaranteed.

[0035] Optionally, the input gear 410 and the spray arm body 100 are coaxially arranged, meaning that the central axis of the input gear 410 and the first rotation axis 810 coincide, which helps to improve the transmission efficiency of the input gear 410 and the output gear 430.

[0036] In some embodiments, combined with Figure 5 and Figure 6As shown, the drive mechanism 400 also includes at least one intermediate gear 420 disposed between the input gear 410 and the output gear 430 for transmission. The intermediate gear 420 includes a first gear section 421 and a second gear section 423 that are coaxial and rotate synchronously. The number of teeth of the first gear section 421 is greater than the number of teeth of the second gear section 423. The first gear section 421 meshes with the gear preceding it, and the second gear section 423 meshes with the gear following it. With this arrangement, it is easy to realize at least two stages of speed reduction transmission between the input gear 410 and the output gear 430, and the overall structure is compact, reducing the space occupied.

[0037] For example, an intermediate gear 420 is provided between the input gear 410 and the output gear 430. The first gear portion 421 of the intermediate gear 420 meshes with the input gear 410, and the second gear portion 423 of the intermediate gear 420 meshes with the output gear 430. The input gear 410 and the first gear portion 421 form a first-stage reduction transmission, and the second gear portion 423 and the output gear 430 form a second-stage reduction transmission. Through the two-stage reduction transmission, torque amplification is achieved. Since the teeth of the first gear portion 421 are larger than the teeth of the second gear portion 423, the diameter of the first gear portion 421 is larger than the diameter of the second gear portion 423. When the output gear 430 and the second gear portion 423 mesh, the first gear portion 421 and the output gear 430 have at least partial overlap in the axial direction, which helps to reduce the occupation of radial space and makes the structure compact.

[0038] For example, two intermediate gears 420 are provided between the input gear 410 and the output gear 430. The first gear portion 421 of the first intermediate gear 420 meshes with the input gear 410 (the input gear 410 is the preceding gear of the first gear portion 421 of the first intermediate gear 420), thereby forming a first-stage reduction transmission. The second gear portion 423 of the first intermediate gear 420 meshes with the first gear portion 421 of the second intermediate gear 420 (the first gear portion 421 of the second intermediate gear 420 is the following gear of the second gear portion 423 of the first intermediate gear 420, that is, the second gear portion 423 of the first intermediate gear 420 is the preceding gear of the first gear portion 421 of the second intermediate gear 420), thereby forming a second-stage reduction transmission. The second gear portion 423 of the second intermediate gear 420 meshes with the output gear 430 (the output gear 430 is the following gear of the second gear portion 423 of the second intermediate gear 420), thereby forming a third-stage reduction transmission.

[0039] For example, combining Figure 5 and Figure 6As shown, three intermediate gears 420 are provided between the input gear 410 and the output gear 430, corresponding to intermediate gears 420(A), 420(B), and 420(C) in the figure. The input gear 410 meshes with the first gear portion 421 of the intermediate gear 420(A) to form a first-stage reduction transmission. The second gear portion 423 of the intermediate gear 420(A) meshes with the first gear portion 421 of the intermediate gear 420(B) to form a second-stage reduction transmission. The second gear portion 423 of the intermediate gear 420(B) meshes with the first gear portion 421 of the intermediate gear 420(C) to form a third-stage reduction transmission. The second gear portion 423 of the intermediate gear 420(C) meshes with the output gear 430 to form a fourth-stage reduction transmission.

[0040] In some embodiments, combined with Figure 1 and Figure 2 As shown, the slide plate 300 is mounted on the outer surface of the spray arm body 100, and the input gear 410, intermediate gear 420, and output gear 430 are located between the spray arm body 100 and the slide plate 300. The slide plate 300 can be mounted on either the upper or lower surface of the spray arm body 100. Since the slide plate 300 needs to drive the first nozzle 210 to move, and the first nozzle 210 needs to spray water outwards, mounting the slide plate 300 on the outer surface of the spray arm body 100 facilitates the engagement between the slide plate 300 and the first nozzle 210. Furthermore, since the internal space of the spray arm body 100 is limited, mounting the slide plate 300 on the outer surface of the spray arm body 100 simplifies the structural complexity between the slide plate 300 and the spray arm body 100, helping to reduce assembly difficulty.

[0041] The spray arm body 100 and the slide plate 300 work together to protect the input gear 410, intermediate gear 420, and output gear 430, preventing foreign objects from getting stuck between the gears and ensuring the speed reduction transmission. For example, the upper surface of the spray arm body 100 is provided with a support column 150. The input gear 410, intermediate gear 420, and output gear 430 are each provided with a shaft hole to be fitted onto the corresponding support column 150 so that they can rotate. The slide plate 300 is assembled onto the upper surface of the spray arm body 100 to cover the input gear 410, intermediate gear 420, and output gear 430.

[0042] In some embodiments, combined with Figure 1 and Figure 2 As shown, the input gear 410 is located below the slide plate 300, and the slide plate 300 is provided with a clearance hole 310. The spray arm assembly includes a connecting seat 500. One end of the connecting seat 500 is adapted to pass through the clearance hole 310 and be fixedly connected to the input gear 410. The other end of the connecting seat 500 is adapted to be fixedly connected to the water supply pipe.

[0043] The input gear 410 and the connecting seat 500 are fixedly connected, meaning that the relative positions of the input gear 410 and the connecting seat 500 remain unchanged after connection. Similarly, the connecting seat 500 and the water supply pipe are fixedly connected, meaning that the relative positions of the connecting seat 500 and the water supply pipe remain unchanged after connection. Normally, the water supply pipe remains stationary in the dishwasher, thus ensuring that the input gear 410 remains stationary.

[0044] Since the slide plate 300 needs to reciprocate relative to the spray arm body 100, and the spray arm body 100 needs to be connected to the water supply pipe, the slide plate 300 is provided with a clearance hole 310. One end of the connecting seat 500 is adapted to pass through the clearance hole 310 and be fixedly connected to the input gear 410. The other end of the connecting seat 500 is fixedly connected to the water supply pipe. By setting the clearance hole 310, interference with the reciprocating movement of the slide plate 300 is avoided.

[0045] One end of the connector 500 is adapted to pass through the clearance hole 310 and be fixedly connected to the input gear 410. It is only necessary to ensure that part of the connector 500 passes through the clearance hole 310 and is fixedly connected to the input gear 410. The input gear 410 does not need to pass through the clearance hole 310. This can minimize the opening area of ​​the clearance hole 310. The input gear 410 can be hidden under the slide plate 300, reducing the probability of foreign objects entering between the slide plate 300 and the spray arm body 100.

[0046] By fixing the connecting seat 500 and the water supply pipe, the spray arm assembly is installed on the water supply pipe. The water supplied by the water supply pipe enters the water flow channel of the spray arm body 100 and is sprayed out from the drive hole 220 and the first nozzle 210. The spray arm body 100 can rotate relative to the water supply pipe, the connecting seat 500 and the input gear 410 around the first rotation axis 810.

[0047] Specifically, see Figure 1 and Figure 2 As shown, the connecting seat 500 and the input gear 410 are fixedly connected and sleeved on the water inlet end 110 of the spray arm body 100. The spray arm assembly includes a locking block 700, which is fixedly connected to the water inlet end 110 to limit the input gear 410 and the connecting seat 500 between the locking block 700 and the spray arm body 100. The connecting seat 500 is adapted to be fixedly connected to the water outlet end of the water supply pipe so that the water outlet end of the water supply pipe and the water inlet end 110 are connected.

[0048] The assembly of the spray arm assembly is as follows: the input gear 410, the intermediate gear 420, and the output gear 430 are installed on the spray arm body 100. The input gear 410 is sleeved on the water inlet end 110 of the spray arm body 100. At this time, the spray arm body 100 can rotate relative to the input gear 410 (the input gear 410 is stationary when the spray arm assembly is working). The slide plate 300 is assembled on the outer surface of the spray arm body 100. The connecting seat 500 passes through the clearance hole 310 and is sleeved on the water inlet end 110. The spray arm body 100 can rotate relative to the connecting seat 500 (the connecting seat 500 is stationary when the spray arm assembly is working). The connecting seat 500 and the input gear 410 cooperate with each other and limit each other in the circumferential direction of the water inlet end 110. The locking block 700 and the water inlet end 110 are fixedly connected, so the relative position between the locking block 700 and the water inlet end 110 remains unchanged, that is, the relative position between the locking block 700 and the spray arm body 100 remains unchanged. For example, the locking block 700 is inserted into the water inlet end 110 and fixedly connected to the water inlet end 110 by rotating the locking block. The locking block 700 ensures that the connecting seat 500 and the input gear 410 are confined to the water inlet end 110, that is, the input gear 410 and the connecting seat 500 are confined between the locking block 700 and the spray arm body 100. At this time, the connecting seat 500 and the input gear 410 cannot detach from the water inlet end 110 of the spray arm body 100. In other words, along the axial and circumferential directions of the first rotation axis 810, the relative position of the input gear 410 and the connecting seat 500 remains unchanged, achieving a fixed connection. The structure formed by the spray arm body 100 and the locking block 700 is rotatable relative to the structure formed by the connecting seat 500 and the input gear 410. A gasket 600 can be provided between the locking block 700 and the connecting seat 500. The gasket 600 serves to lubricate and seal.

[0049] The assembled spray arm assembly can be fixedly connected to the water supply pipe via the connecting seat 500, thereby installing the spray arm assembly onto the water supply pipe. The fixed connection between the connecting seat 500 and the water supply pipe can be achieved by rotating a buckle, so that the water outlet end and the water inlet end 110 can be connected relative to each other. For example, the water outlet end can be inserted into the buckle 700 to connect with the water inlet end 110, and the water flow provided by the water supply pipe can enter the water flow channel.

[0050] The locking block 700 limits the input gear 410 and the connecting seat 500 to the water inlet 110. That is, the locking block 700 provides axial positioning of the input gear 410 and the connecting seat 500 along the first rotation axis 810. To facilitate mutual circumferential positioning of the connecting seat 500 and the input gear 410 along the first rotation axis 810, combined with… Figure 1 , Figure 2 , Figure 7 and Figure 8As shown, in some embodiments, the connector 500 is provided with a slot 411, and the input gear 410 is provided with a pin 510. The pin 510 and the slot 411 are adapted to be inserted into each other along the axial direction of the first rotation axis 810 so as to limit each other in the circumferential direction along the first rotation axis 810.

[0051] For example, the inner circumferential surface of the input gear 410 is provided with a plurality of spaced slots 411, and the outer circumferential surface of the connecting seat 500 is provided with a plurality of spaced pins 510. When the connecting seat 500 and the input gear 410 are connected, they move towards each other along the axial direction of the first rotation axis 810 so that the pins 510 are inserted into the slots 411. This achieves circumferential positioning, which is convenient and quick. This kind of cooperation also helps to simplify the cooperation structure between the input gear 410 and the connecting seat 500, and helps to further reduce the opening area of ​​the clearance hole 310.

[0052] In some embodiments, combined with Figure 1 , Figure 2 and Figure 9 As shown, the output gear 430 is adapted to rotate about the second rotation axis 820. The output gear 430 is provided with an eccentric part 431, which is offset from the second rotation axis 820. The slide plate 300 is provided with a socket 340, and the eccentric part 431 is inserted into the socket 340. When the output gear 430 rotates about the second rotation axis 820, it drives the slide plate 300 to reciprocate through the cooperation of the eccentric part 431 and the socket 340. By setting the eccentric part 431, it acts on the socket 340, thereby driving the slide plate 300 to reciprocate.

[0053] For example, the slide plate 300 reciprocates along a first direction, and the insertion hole 340 extends along a second direction, meaning the insertion hole 340 has a long and narrow structure along the second direction (e.g., the insertion hole 340 is an oblong hole). An angle greater than 0° is formed between the second direction and the first direction. The eccentric part 431 rotates with the output gear 430 and performs a similar eccentric motion relative to the second rotation axis 820. This allows the eccentric part 431 to abut against the hole wall of the insertion hole 340. The abutment between the eccentric part 431 and the hole wall of the insertion hole 340 generates a component force along the first direction on the slide plate 300. As the output gear 430 continues to rotate around the second rotation axis 820, the two side holes of the insertion hole 340 along the first direction are alternately abutted by the eccentric part 431, thus driving the slide plate 300 to reciprocate along the first direction. Understandably, during the reciprocating movement of the slide plate 300 along the first direction, the eccentric portion 431 moves relative to the insertion hole 340 along the second direction within the insertion hole 340. Therefore, the extension length of the insertion hole 340 along the second direction needs to provide sufficient allowance for the eccentric portion 431. The extension length of the insertion hole 340 along the second direction can be determined based on actual testing or structural layout. When the second direction is perpendicular to the first direction, the force generated by the contact between the eccentric portion 431 and the hole wall of the insertion hole 340 is maximized along the first direction, which is more conducive to the reciprocating movement of the slide plate 300 along the first direction.

[0054] In some embodiments, combined with Figures 1 to 4 As shown, one of the slide plate 300 and the spray arm body 100 is provided with a sliding protrusion 120, which is adapted to slide against the other of the slide plate 300 and the spray arm body 100. For example, the upper surface of the spray arm body 100 is provided with the sliding protrusion 120, and the slide plate 300 can slide against the sliding protrusion 120 when it reciprocates. This reduces the contact area between the slide plate 300 and the spray arm body 100, which helps to reduce frictional resistance and makes the reciprocating movement of the slide plate 300 smoother, thereby better driving the first nozzle 210. It can be understood that the sliding protrusion 120 can also be provided on the slide plate 300.

[0055] Combination Figures 1 to 4As shown, in some embodiments, the slide plate 300 is adapted to reciprocate along a first direction. The spray arm body 100 is provided with a limiting part 130, and the slide plate 300 is provided with a limiting engagement part 330. The limiting part 130 and the limiting engagement part 330 mutually restrict each other and can move relative to each other along the first direction. The mutual restriction between the limiting part 130 and the limiting engagement part 330 means that after the slide plate 300 and the spray arm body 100 are assembled together, and under the mutual cooperation of the limiting part 130 and the limiting engagement part 330, the slide plate 300 and the spray arm body 100 cannot be completely separated. At the same time, under the premise that the limiting part 130 and the limiting engagement part 330 mutually restrict each other, the limiting part 130 and the limiting engagement part 330 can move relative to each other along the first direction. This guides the reciprocating movement of the slide plate 300 along the first direction, so that the slide plate 300 can reciprocate along the first direction under the guidance of the limiting part 130 and the limiting engagement part 330 under the action of the driving mechanism 400.

[0056] Optionally, one of the limiting part 130 and the limiting mating part 330 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 130 and the limiting mating part 330.

[0057] Taking the limiting part 130 as the limiting buckle and the limiting mating part 330 as the limiting groove as an example, when the slide plate 300 is assembled to the spray arm body 100, 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 300 and the spray arm body 100 is completed. The slide plate 300 cannot be completely separated from the spray arm body 100. 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 being an oblong hole). The limiting buckle can move relative to the limiting groove along the first direction. That is, when the slide plate 300 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 300 and the spray arm body 100 can be guaranteed, and the reciprocating movement of the slide plate 300 can also be guided.

[0058] In some embodiments, combined with Figures 1 to 4 As shown, the slide plate 300 is adapted to drive the first nozzle 210 to oscillate back and forth during reciprocating movement; that is, the specific form of the movement of the first nozzle 210 is the oscillation of the first nozzle 210 relative to the spray arm body. Since the movement of the slide plate 300 relative to the spray arm body is a reciprocating movement, the reciprocating oscillation of the first nozzle 210 driven by the slide plate 300 will help simplify the cooperation structure between the slide plate 300 and the first nozzle 210. Optionally, the first nozzle 210 can be provided only on one side of the spray arm body 100, thus shortening the length of the slide plate 300.

[0059] In some embodiments, combined with Figures 1 to 4 As shown, the slide plate 300 is provided with a locking hole 320 (the specific type of the hole can be selected according to actual needs, such as a through hole structure or a blind hole structure). The first nozzle 210 is at least partially inserted through the locking hole 320, thus realizing the coupling between the slide plate 300 and the first nozzle 210. Since the first nozzle 210 is at least partially inserted through the locking hole 320, the first nozzle 210 can be exposed relative to the slide plate 300, so that it can spray water without being blocked by the slide plate 300. When the slide plate 300 moves back and forth, it acts on the first nozzle 210 through the locking hole 320, thereby driving the first nozzle 210 to swing back and forth.

[0060] For example, the spray arm body 100 is provided with a connector 140 communicating with the water flow channel, and the first nozzle 210 and the connector 140 are spherically connected. The so-called spherical connection means that one of the connector 140 and the first nozzle 210 has a spherical cavity 211 to enclose the other, and the other of the connector 140 and the first nozzle 210 has a spherical surface 141. Either the connector 140 encloses the first nozzle 210, or the first nozzle 210 encloses the connector 140. When the connector 140 and the first nozzle 210 are assembled together, a universal joint structure is formed, and the first nozzle 210 communicates with the connector 140, and subsequently with the water flow channel. The slide plate 300 reciprocates and then moves the first nozzle 210 through the locking hole 320, causing the orientation of the first nozzle 210 to change. Based on the deceleration design of the drive mechanism 400, the spherical surface 141 and the cavity wall of the spherical cavity 211 can achieve a tighter fit, reducing water leakage between the first nozzle 210 and the connector 140.

[0061] In some embodiments, combined with Figure 1 and Figure 2 As shown, the main body 100 of the spray arm forms an upward-opening cavity, and the slide plate 300 is disposed in the cavity. This arrangement makes the overall structure of the spray arm assembly relatively compact, while also providing a certain degree of protection for the reciprocating movement of the slide plate 300.

[0062] The second aspect of this application discloses a dishwasher, which includes the above-described spray arm assembly. It is understood that the spray arm assembly 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.

[0063] 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, characterized in that, include: The spray arm body (100) is adapted to rotate about a first rotation axis (810), and the spray arm body (100) is provided with a water flow channel; The first nozzle (210) is movably disposed on the spray arm body (100) and communicates with the water flow channel; A sliding plate (300) is mounted on the spray arm body (100) and is reciprocating relative to the spray arm body (100). The sliding plate (300) is adapted to drive the first nozzle (210) to move when reciprocating relative to the spray arm body (100), so that the orientation of the first nozzle (210) relative to the spray arm body (100) changes. as well as A drive mechanism (400) is provided, comprising an input gear (410) and an output gear (430). The spray arm body (100) is adapted to rotate relative to the input gear (410) about the first rotation axis (810). The output gear (430) is disposed on the spray arm body (100) and is connected to the input gear (410) in a transmission manner. When the spray arm body (100) rotates about the first rotation axis (810), the output gear (430) revolves around the first rotation axis (810) and rotates on its own axis to drive the slide plate (300) to reciprocate. The input gear (410) to the output gear (430) form at least two stages of speed reduction transmission.

2. The spray arm assembly as described in claim 1, characterized in that, The drive mechanism (400) further includes at least one intermediate gear (420) disposed between the input gear (410) and the output gear (430) for transmission. The intermediate gear (420) includes a first gear section (421) and a second gear section (423) that are coaxial and rotate synchronously. The number of teeth of the first gear section (421) is greater than the number of teeth of the second gear section (423). The first gear section (421) meshes with the preceding gear, and the second gear section (423) meshes with the following gear.

3. The spray arm assembly as described in claim 2, characterized in that, The slide plate (300) is mounted on the outer surface of the spray arm body (100), and the input gear (410), the intermediate gear (420) and the output gear (430) are located between the spray arm body (100) and the slide plate (300).

4. The spray arm assembly as described in claim 1, characterized in that, The input gear (410) is located below the slide plate (300), and the slide plate (300) is provided with a clearance hole (310). The spray arm assembly includes a connecting seat (500). One end of the connecting seat (500) is adapted to pass through the clearance hole (310) and be fixedly connected to the input gear (410). The other end of the connecting seat (500) is adapted to be fixedly connected to the water supply pipe.

5. The spray arm assembly as described in claim 4, characterized in that, The connecting seat (500) and the input gear (410) are fixedly connected and sleeved on the water inlet end (110) of the spray arm body (100). The spray arm assembly includes a locking block (700), which is fixedly connected to the water inlet end (110) to limit the input gear (410) and the connecting seat (500) between the locking block (700) and the spray arm body (100). The connecting seat (500) is adapted to be fixedly connected to the water outlet end of the water supply pipe so that the water supply pipe and the water inlet end (110) of the spray arm body (100) are connected.

6. The spray arm assembly as described in claim 5, characterized in that, The connector (500) is provided with a slot (411), and the input gear (410) is provided with a pin (510). The pin (510) and the slot (411) are adapted to be inserted into each other along the axial direction of the first rotation axis (810) so as to limit each other in the circumferential direction of the first rotation axis (810).

7. The spray arm assembly as claimed in claim 1, characterized in that, The output gear (430) is adapted to rotate around the second rotation axis (820). The output gear (430) is provided with an eccentric part (431), which is offset from the second rotation axis (820). The slide plate (300) is provided with a socket (340). The eccentric part (431) is inserted into the socket (340). When the output gear (430) rotates around the second rotation axis (820), it drives the slide plate (300) to reciprocate through the cooperation of the eccentric part (431) and the socket (340).

8. The spray arm assembly as claimed in claim 7, characterized in that, The extension direction of the socket (340) is perpendicular to the reciprocating movement direction of the slide plate (300).

9. The spray arm assembly as claimed in claim 1, characterized in that, The slide plate (300) is provided with a locking hole (320), and the first nozzle (210) is at least partially inserted through the locking hole (320). The slide plate (300) is adapted to drive the first nozzle (210) to swing back and forth during reciprocating movement. And / or, the spray arm body (100) is provided with a connector (140) communicating with the water flow channel, and the first nozzle (210) and the connector (140) are spherically connected.

10. The spray arm assembly as claimed in claim 1, characterized in that, The main body of the spray arm (100) has an upwardly open cavity (160), and the slide plate (300) is disposed in the cavity (160).

11. The spray arm assembly as claimed in claim 1, characterized in that, The input gear (410) and the spray arm body (100) are coaxially arranged; And / or, the slide plate (300) can reciprocate along the extension direction of the spray arm body (100).

12. A dishwasher, characterized in that, The dishwasher includes the spray arm assembly as described in any one of claims 1 to 11.

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