Spraying arm for cleaning machine and cleaning machine

Abstract

The spraying arm comprises a body with a flow channel, a water outlet communicated with the flow channel is formed in the side wall of the body, a nozzle is connected to the water outlet in a rotating mode, and a water inlet sleeve which can be matched with the water outlet in an inserted mode and connected with the water outlet in a rotating mode is arranged at the bottom of the nozzle. The water inlet sleeve of the nozzle is connected in the water outlet in a threaded rotation mode, the threaded rotation only exists in the assembling process so that extrusion of the nozzle and a spraying arm can be avoided in the assembling process, and after assembling is completed, the second threaded part is located in the body to form a limiting structure of the water inlet sleeve and the body. The rotating surface at the upper part of the water inlet sleeve is in rotating fit with the first threaded surface, and the rotating direction of the nozzle under the water flow viscous force of a water column sprayed by a spraying hole of the nozzle is opposite to the thread disengagement direction, so that the nozzle is prevented from being disengaged from the spraying arm body under non-manual operation, and when the nozzle needs to be disassembled, the nozzle can be manually and reversely rotated and taken down; the assembling structure is simple and reasonable, and operation is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of dishwashers, in particular to a spray arm for a washing machine and a washing machine. Background Art

[0002] Dishwashers are generally provided with a spray arm that rinses dishes or fruits and vegetables by spraying water jets. For example, the applicant's prior application CN202211611048.7 "A washing machine" discloses a structure, which includes a box and a spray arm, the spray arm is rotatably arranged in the box, the spray arm is provided with a hollow flow channel, the spray arm is also provided with a water outlet connected to the flow channel, the water outlet is connected to a nozzle that can rotate relative to the spray arm, and the upper surface of the spray arm is provided with a concave installation groove for installing the nozzle and in a semi-enclosed structure.

[0003] The above structure is provided with a nozzle at the end of the spray arm which can rotate with the spray arm and can rotate relative to the spray arm, which is conducive to eliminating the cleaning dead angle. The nozzle is constrained on the spray arm by the claw at its water inlet. During assembly, the claw is inserted into the connection hole of the spray arm by deformation and extrusion, which can easily cause the water inlet of the nozzle to break or be damaged, affecting the rotation stability of the nozzle or causing water leakage. Utility Model Content

[0004] The first technical problem to be solved by the utility model is to provide a spray arm for a cleaning machine which can protect the connection structure between the nozzle and the spray arm during the assembly process, thereby improving the stability of the nozzle.

[0005] The second technical problem to be solved by the utility model is to provide a cleaning machine using the above-mentioned spray arm in view of the current status of the prior art.

[0006] The technical solution adopted by the utility model to solve at least one of the above technical problems is:

[0007] A spray arm for a cleaning machine comprises a body with a flow channel, a water outlet connected to the flow channel is provided on the side wall of the body, a nozzle is rotatably connected to the water outlet, a water inlet sleeve which can be plugged and rotatably connected to the water outlet is provided at the bottom of the nozzle, a first thread is provided on the inner peripheral wall of the water outlet, a second thread matching the first thread is provided on the outer peripheral wall of the lower part of the water inlet sleeve, a rotating surface which can rotatably cooperate with the first thread is formed on the outer peripheral wall of the upper part of the water inlet sleeve, and a spray hole is provided on the nozzle which can enable the water inlet sleeve to always maintain a tendency to screw in relative to the water outlet as the nozzle rotates.

[0008] The utility model connects the water inlet sleeve of the nozzle to the water outlet by means of threaded rotation, but the threaded rotation only exists during the assembly process, so as to avoid squeezing of the nozzle and the spray arm during the assembly process. After the assembly is completed, the second threaded portion is located inside the main body to form a limiting structure of the water inlet sleeve and the main body, the rotating surface of the upper part of the water inlet sleeve is rotationally matched with the first threaded surface, and the rotation direction of the nozzle under the viscosity of the water flow of the water column sprayed from its own spray hole is opposite to the direction of thread disengagement, thereby ensuring that the nozzle will not be separated from the spray arm body under unintended operation. The entire assembly structure is simple and reasonable, easy to operate, and convenient for disassembly and assembly of the nozzle and the spray arm body.

[0009] Preferably, the thickness of the top wall of the body is d, the height of the water inlet jacket is H, and H>1.5d. Preferably, the height of the second threaded portion is less than or equal to d, and the height of the rotating surface is greater than d. The above structure is adopted so that the rotating surface has enough height to rotate with the first threaded portion without interfering with the second threaded portion.

[0010] Preferably, the top wall of the body partially arches upwards and the water outlet is opened at the center of the protrusion. With such a structure, the structure of the protrusion can serve as a reinforcement structure to increase the support strength of the water outlet of the spray arm body.

[0011] Preferably, a horizontally arranged mounting platform is formed at the upper end of the protrusion, the water outlet is opened on the mounting platform, and the concave cavity formed under the protrusion constitutes a buffer cavity for accommodating the lower part of the water inlet jacket. Preferably, in the assembled state, the lower end of the water inlet jacket is always hidden in the buffer cavity. Preferably, the cross section of the buffer cavity is formed into an inverted V-shaped structure. The above structure can prevent the water inlet jacket from extending into the flow channel and interfering with the flow direction of the fluid in the flow channel.

[0012] Preferably, the outer peripheral wall of the water inlet sleeve is provided with a drainage gap extending axially so that the water in the flow channel can be discharged from the water outlet, and the inner wall surface of the buffer cavity constitutes a guide surface for gathering water to the drainage gap. The utility model adopts a threaded rotation method to rotate the water inlet sleeve into the water outlet, and the required assembly gap is very small. However, the water flow pressure at the connection between the water inlet sleeve and the water outlet is very large. The impact of the high-pressure water flow may cause the nozzle rotation to be easily stuck. The above-mentioned drainage gap is provided to actively release part of the pressure, which is conducive to improving the smoothness and stability of the rotation of the nozzle; the water in the flow channel is gradually gathered into the drainage gap through the guide surface of the buffer cavity, which is conducive to eliminating the problem of water flow turbulence and further improving the rotation stability of the water inlet sleeve at the water outlet.

[0013] Preferably, the drainage slits have an even number and are arranged symmetrically in the circumferential direction of the water inlet sleeve. The width of the drainage slits gradually widens along the water outlet direction. The above structure can further balance the forces in the circumferential direction of the water inlet sleeve and improve the rotational stability of the water inlet sleeve; the gradually widening drainage slits can reduce the pressure of the discharged water flow and avoid the influence of the rotational force on the bottom of the nozzle.

[0014] A cleaning machine comprises a box body, a concave water return area is arranged at the bottom of the box body, the top of the water return area is covered with a filter plate, and also comprises the above-mentioned spray arm, which is rotatably arranged on the filter plate and connected to the water return area through a water pump mechanism.

[0015] Compared with the prior art, the utility model has the following advantages: the utility model connects the water inlet sleeve of the nozzle to the water outlet by means of threaded rotation, but the threaded rotation only exists during the assembly process, so as to avoid squeezing of the nozzle and the spray arm during the assembly process; after the assembly is completed, the second threaded portion is located inside the main body to form a limiting structure of the water inlet sleeve and the main body; the rotating surface of the upper part of the water inlet sleeve rotates with the first threaded surface, and the rotation direction of the nozzle under the viscosity of the water flow of the water column sprayed from its own spray hole is opposite to the direction of thread disengagement, thereby ensuring that the nozzle will not detach from the spray arm body without human operation; when the nozzle needs to be disassembled, the nozzle can be manually rotated in the opposite direction to be removed; the entire assembly structure is simple and reasonable, easy to operate, and convenient for disassembly and assembly of the nozzle and the spray arm body. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the spray arm of an embodiment of the utility model;

[0017] Figure 2 for Figure 1 Schematic diagram of the bottom structure;

[0018] Figure 3 for Figure 1 A partial cross-sectional view of

[0019] Figure 4 for Figure 3 Exploded diagram of

[0020] Figure 5 It is a schematic diagram of the structure of the nozzle in the embodiment of the utility model. DETAILED DESCRIPTION

[0021] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0022] like Figures 1 to 5As shown, the spray arm for the washing machine of this embodiment includes a main body 1 extending in the length direction, and the main body 1 is hollow inside to form a flow channel 12, and the flow channel 12 also extends in the length direction of the main body 1. A water inlet 13 connected to the flow channel is provided at the central part of the bottom wall of the main body 1, and a plurality of spray holes arranged at intervals and connected to the flow channel are provided on the top wall of the main body 1. A water outlet 15 arranged near the end is provided on the top wall of the main body 1, and a nozzle 2 that can rotate relative to the main body 1 is rotatably connected to the water outlet 15, and a spray hole is provided on the nozzle 2. The nozzle 2 is located at the end of the spray arm, and while rotating with the spray arm, it can also rotate by itself, so as to spray the outer periphery of the bowl basket and the inner wall of the washing chamber, so as to further eliminate the cleaning dead corners and improve the cleaning effect.

[0023] The bottom of the nozzle 2 is provided with a water inlet sleeve 21 that can be plugged and rotatably connected with the water outlet 15, the inner peripheral wall of the water outlet 15 is provided with a first thread 151, the outer peripheral wall of the lower part of the water inlet sleeve 21 is provided with a second thread 211 that matches the first thread 151, and the outer peripheral wall of the upper part of the water inlet sleeve 21 is formed with a rotating surface 212 that can rotate with the first thread 15, and the nozzle 2 is provided with a spray hole 22 that can make the water inlet sleeve 21 rotate with the nozzle 2 and always keep the tendency to screw in relative to the water outlet 15. That is, the spray hole 22 sprays a water column to apply a recoil force to the nozzle 2, and the recoil force drives the nozzle 2 to rotate in the same direction as the direction in which the water inlet sleeve 21 is screwed into the water inlet 15, and the water inlet sleeve 21 will not separate from the water outlet 15 as the nozzle 2 rotates.

[0024] The thickness of the top wall of the body 1 is d, the height of the water inlet jacket 21 is H, and H>1.5d. The height of the second thread 211 is less than or equal to d, and the height of the rotating surface 212 is greater than d. The above structure is adopted so that the rotating surface 212 has a sufficient height to rotate with the first thread 151 without interfering with the second thread 211.

[0025] The top wall of the body 1 partially arches upward to form a protrusion 11, and the water outlet 15 is opened at the center of the protrusion 11. With such a structure, the structure of the protrusion 11 can serve as a reinforcement structure to increase the support strength of the water outlet 15 of the spray arm body 1.

[0026] A horizontally arranged mounting platform 111 is formed at the upper end of the protrusion 11, and the water outlet 15 is opened on the mounting platform 111. The concave cavity formed under the protrusion 11 constitutes a buffer cavity 112 for accommodating the lower part of the water inlet jacket 21. In the assembled state, the lower end of the water inlet jacket 21 is always hidden in the buffer cavity 112, that is, the water inlet jacket 21 will not cross the buffer cavity 112 and extend into the flow channel 12. The cross section of the buffer cavity 112 is formed into an inverted V-shaped structure. With the above structure, it is possible to prevent the water inlet jacket 21 from extending into the flow channel 12 and interfering with the flow direction of the fluid in the flow channel 12.

[0027] The outer peripheral wall of the water inlet sleeve 21 is provided with a drainage gap 213 extending in the axial direction so that the water in the flow channel 12 can be discharged outward from the water outlet 15, and the inner wall surface of the buffer cavity 112 constitutes a guide surface 113 for gathering water to the drainage gap 213. In this embodiment, the water inlet sleeve 21 is rotated into the water outlet 15 by screw rotation, and the required assembly gap is very small. However, the water flow pressure at the connection between the water inlet sleeve 21 and the water outlet 15 is very large, and the impact of the high-pressure water flow may cause the nozzle 2 to be easily stuck during rotation. The above-mentioned drainage gap 213 is provided to actively release part of the pressure, which is conducive to improving the smoothness and stability of the rotation of the nozzle 2; the water in the flow channel 12 is gradually gathered into the drainage gap 213 through the guide surface 113 of the buffer cavity 112, which is conducive to eliminating the problem of water flow turbulence and further improving the rotation stability of the water inlet sleeve 21 at the water outlet 15.

[0028] The drainage slits 213 are an even number and are arranged symmetrically in the circumferential direction of the water inlet jacket 21. In this embodiment, four drainage slits 213 are arranged, and the four drainage slits 213 are evenly distributed in the circumferential direction of the water inlet jacket 21. The width of the drainage slits 213 gradually widens along the water outlet direction. With the above structure, the force in the circumferential direction of the water inlet jacket 21 can be further balanced, and the rotation stability of the water inlet jacket 21 can be improved; the gradually widened drainage slits 213 can reduce the pressure of the discharged water flow, avoiding the influence of the rotation force on the bottom of the nozzle 2.

[0029] The cleaning machine of this embodiment includes a box body, a concave water return area is provided at the bottom of the box body, the top of the water return area is covered with a filter plate, and also includes the above-mentioned spray arm, which is rotatably provided on the filter plate and is connected to the water return area through a water pump mechanism. A slag collection basket for collecting slag during the cleaning process is also provided, the lower part of the slag collection basket is accommodated in the water return area, and the top of the slag collection basket has a slag collection port exposed from the filter plate to facilitate slag collection.

[0030] In this embodiment, the water inlet sleeve 21 of the nozzle 2 is connected to the water outlet 15 by means of threaded rotation, but the threaded rotation only exists during the assembly process to avoid squeezing of the nozzle 2 and the spray arm during the assembly process. After the assembly is completed, the second thread 211 is partially located inside the body 1 to form a limiting structure of the water inlet sleeve 21 and the body 1. The rotating surface 212 on the upper part of the water inlet sleeve 21 is rotated with the first thread 151 surface, and the rotation direction of the nozzle 2 under the viscosity of the water flow of the water column sprayed from its own spray hole 22 is opposite to the direction of thread disengagement, thereby ensuring that the nozzle 2 will not be separated from the spray arm body 1 without human operation. When the nozzle 2 needs to be disassembled, the nozzle 2 can be manually rotated in the opposite direction to be removed. The entire assembly structure is simple and reasonable, and the operation is convenient, which facilitates the disassembly and assembly of the nozzle and the spray arm body.

[0031] In the specification and claims of the present invention, terms indicating directions, such as "front", "rear", "up", "down", "left", "right", "side", "top", "bottom", etc., are used to describe various exemplary structural parts and elements of the present invention, but these terms are used here only for the purpose of convenience of description and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in the present invention can be arranged in different directions, these terms indicating directions are only used as explanations and should not be regarded as limitations. For example, "up" and "down" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A spray arm for a cleaning machine, comprising a body (1) having a flow channel (12), a water outlet (15) connected to the flow channel (12) being provided on a side wall of the body (1), a nozzle (2) being rotatably connected to the water outlet (15), characterized in that: The bottom of the nozzle (2) is provided with a water inlet sleeve (21) which can be plugged into and rotatably connected with the water outlet (15); the inner peripheral wall of the water outlet (15) is provided with a first thread (151); the outer peripheral wall of the lower part of the water inlet sleeve (21) is provided with a second thread (211) which matches the first thread (151); the outer peripheral wall of the upper part of the water inlet sleeve (21) is formed with a rotating surface (212) which can rotatably cooperate with the first thread (151); and the nozzle (2) is provided with a spray hole (22) which enables the water inlet sleeve (21) to always maintain a tendency to be screwed in relative to the water outlet (15) as the nozzle (2) rotates.

2. The spray arm for a cleaning machine according to claim 1, characterized in that: The thickness of the top wall of the main body (1) is d, the height of the water inlet jacket (21) is H, and H>1.5d.

3. The spray arm for a cleaning machine according to claim 2, characterized in that: The height of the second thread (211) portion is less than or equal to d, and the height of the rotating surface (212) is greater than d.

4. The spray arm for a cleaning machine according to claim 1, 2 or 3, characterized in that: The top wall of the main body (1) partially arches upward to form a protruding portion (11), and the water outlet (15) is arranged at the center of the protruding portion (11).

5. The spray arm for a cleaning machine according to claim 4, characterized in that: A horizontally arranged mounting platform (111) is formed at the upper end of the protruding portion (11), the water outlet (15) is opened on the mounting platform (111), and the concave cavity formed below the protruding portion (11) constitutes a buffer cavity (112) for accommodating the lower part of the water inlet jacket (21) therein.

6. The spray arm for a cleaning machine according to claim 5, characterized in that: In the assembled state, the lower end of the water inlet jacket (21) is always hidden in the buffer cavity (112).

7. The spray arm for a cleaning machine according to claim 5, characterized in that: The cross section of the buffer chamber (112) is shaped as an inverted V-shaped structure.

8. The spray arm for a cleaning machine according to claim 5, characterized in that: The outer peripheral wall of the water inlet sleeve (21) is provided with a drainage gap (213) extending in the axial direction so as to allow water in the flow channel (12) to be discharged outward from the water outlet (15), and the inner wall surface of the buffer cavity (112) constitutes a guide surface (113) for gathering water toward the drainage gap (213).

9. The spray arm for a cleaning machine according to claim 8, characterized in that: The drainage gaps (213) are in an even number and are symmetrically arranged in the circumferential direction of the water inlet jacket (21).

10. A cleaning machine, comprising a box, wherein a concave water return area is provided at the bottom of the box, and a filter plate is covered on the top of the water return area, characterized in that: It also comprises a spray arm according to any one of claims 1 to 9, wherein the spray arm is rotatably disposed on the filter plate and is connected to the water return area through a water pump mechanism.

Images