CN219070167U

CN219070167U - Spray arm mounting structure for cleaning machine and cleaning machine

Info

Publication number: CN219070167U
Application number: CN202223202474.3U
Authority: CN
Inventors: 张昌海; 韩健健; 施郑赞; 魏本柱; 姜勇
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2022-11-30
Filing date: 2022-11-30
Publication date: 2023-05-26
Anticipated expiration: 2032-11-30

Abstract

The utility model relates to a spray arm mounting structure for a cleaning machine, which comprises a water pump and a spray arm, wherein a water outlet and a water outlet sleeve extending upwards around the water outlet are formed in the top wall of the water pump; the first connecting piece is sleeved on the periphery of the water inlet sleeve and synchronously rotates, the second connecting piece is sleeved on the periphery of the first connecting piece and forms a matching surface which is propped up and down and can be in running fit, and the second connecting piece is detachably locked on the water pump. Because the first connecting piece and the second connecting piece adopt the matching surfaces which mutually support and press and rotate in the up-down direction, compared with the existing snap ring matching mode, the matching surfaces of force are large and stable, and the rotation stability of the spray arm is improved. And also relates to a cleaning machine comprising the spray arm mounting structure.

Description

Spray arm mounting structure for cleaning machine and cleaning machine

Technical Field

The utility model relates to the technical field of dish washers, in particular to a spray arm mounting structure for a cleaning machine and the cleaning machine.

Background

In a dishwasher using an open water flow system, a spray arm is generally fastened to the bottom of a sink in a snap fit with a deflector mount. Because the water inlet of the spray arm needs to be in running fit with the top of the guide seat, a gap exists at the fit position, and positive pressure can be generated in the water drawing process in the inner side area of the water inlet of the spray arm, water leakage easily occurs at the fit gap between the spray arm and the top of the guide seat, and the energy efficiency and the water efficiency of the dish washer are affected.

In order to solve the above problems, the applicant's prior application CN202221176060.5 "mounting structure of open water pump spray arm and cleaning machine" discloses a structure comprising a flow guiding seat, a spray arm and an impeller, wherein the flow guiding seat is provided with a flow guiding sleeve vertically arranged, the spray arm is rotatably restrained at the top of the flow guiding seat, the bottom wall of the spray arm is provided with a water inlet corresponding to the upper port of the flow guiding sleeve, the bottom wall of the spray arm is provided with a flow guiding sleeve extending downwards along the water inlet, and the flow guiding sleeve is rotatably inserted in the upper part of the flow guiding sleeve; the upper part of the impeller is a centrifugal impeller which can be rotatably positioned in the spray arm, the lower part of the impeller is an axial flow impeller which can be rotatably positioned in the guide sleeve, and the joint of the centrifugal impeller and the axial flow impeller is arranged corresponding to the edge of the water inlet.

The assembly gap is downwards moved to the lower part of the corresponding axial flow impeller, and the centrifugal impeller is a high-pressure area and the axial flow impeller, particularly the lower part of the axial flow impeller, is a low-pressure area in the water drawing process, so that water can be prevented from leaking out through the assembly gap due to high water pressure, and meanwhile, the problem of sucking gas through the assembly gap is avoided due to the fact that the assembly gap is positioned below the water level, and further the energy of the cleaning machine is improved, and stable operation of a water flow system is ensured. However, because the clamping ring for limiting the spray arm up and down and circumferentially is still of a common clamping ring structure in the prior art, the clamping ring structure is in simple clamping fit with the spray arm, the rotating fit surface is small, and the problem of unstable rotation of the spray arm exists.

Disclosure of Invention

The first technical problem to be solved by the present utility model is to provide a spray arm mounting structure for a cleaning machine, which can improve the rotation stability of the spray arm.

The second technical problem to be solved by the utility model is to provide a cleaning machine with the installation structure aiming at the current state of the art.

The utility model solves at least one of the technical problems by adopting the following technical proposal:

the spray arm mounting structure for the cleaning machine comprises a water pump and a spray arm, wherein the water pump and the spray arm are arranged in the cleaning machine, so that a water outlet and a water outlet sleeve extending upwards around the water outlet are formed in the top wall of the water pump, a water inlet and a water inlet sleeve extending downwards around the water inlet and inserted into the water outlet sleeve are formed in the bottom wall of the spray arm, and the spray arm can be rotationally restrained on the water pump through a first connecting piece and a second connecting piece; the first connecting piece is sleeved on the periphery of the water inlet sleeve and synchronously rotates, the second connecting piece is sleeved on the periphery of the first connecting piece and forms a matching surface which is vertically pressed and can be in running fit, and the second connecting piece is detachably locked on the water pump.

Preferably, in the assembled state, the upper end surface of the first connecting piece and the inner top wall of the second connecting piece form the matching surface, and the lower end surface of the first connecting piece is arranged corresponding to the top of the water outlet sleeve. The first connecting piece after the assembly is positioned at the top port of the water outlet sleeve all the time, and when the spray arm is in a leakage state due to high water pressure, the first connecting piece can be used for plugging the leakage, so that the leakage flow is reduced, and the energy loss of the fluid is reduced.

Preferably, the second connecting piece includes a top wall and a ring wall extending downwards from the edge of the top wall, and in the assembled state, the top wall, the ring wall and the top wall of the water pump of the second connecting piece enclose a surrounding cavity which encloses the water outlet sleeve and the water inlet sleeve. The second connecting piece is utilized to form the surrounding cavity which surrounds the rotating fit structure of the spray arm, so that on one hand, residues are prevented from being detained in an assembly gap to influence the rotating stability of the spray arm, on the other hand, the spray arm is restrained in a relatively closed cavity in a leakage mode, the pressure in the cavity is relatively stable, the influence of the washing cavity is small, the leakage flow is reduced, the energy loss of water flow is reduced, and higher jet lift and water pressure are maintained.

Preferably, an assembling gap capable of being in running fit is formed between the water inlet sleeve and the water outlet sleeve, and the lower surface of the first connecting piece is arranged corresponding to the top edge of the water outlet sleeve and forms a leakage flow blocking surface of the assembling gap. By adopting the structure, the dynamic blocking is carried out at the position of the drainage outlet in an aligned way, the combined action with the surrounding cavity is facilitated, the drainage flow is further reduced, and in fact, after the double drainage protection is adopted, the situation that the assembly gap is full of water can be realized, drainage basically does not occur, on one hand, the water filled in the assembly gap plays a sealing role, on the other hand, a rotating lubrication role is played, so that the rotating stability of the spray arm is improved on the basis of meeting the small flow loss.

Preferably, a first supporting rib which can be in rotary fit with the inner wall of the water outlet sleeve is protruded on the peripheral wall of the water inlet sleeve. The structure can reduce the rotation fit area between the water inlet sleeve and the water outlet sleeve, reduce friction and improve the rotation smoothness of the spray arm.

Preferably, the top wall of the spray arm at the inner side of the water outlet sleeve forms a step for restraining the downward movement of the water inlet sleeve.

Preferably, an assembling hole for the water inlet sleeve to pass through is formed in the central part of the top wall of the second connecting piece, an assembling ring extending downwards from the edge of the assembling hole is arranged on the inner top wall of the second connecting piece, and the lower surface of the assembling ring is in rotary fit with the upper end surface of the first connecting piece to form the matching surface. By adopting the structure, on the basis of forming a large-area rotating matching surface, the possible rotation interference between the second connecting piece and the first connecting piece is eliminated, so that the two can rotate smoothly relatively.

Preferably, a second supporting rib extending vertically upwards is arranged on the inner peripheral wall of the first connecting piece, the outer side of the second supporting rib is close to the inner wall of the assembly ring, and the inner side of the second supporting rib is arranged at intervals with the outer wall of the water inlet sleeve. The structure can radially limit the first connecting piece and the second connecting piece, and improves the rotation stability between the first connecting piece and the second connecting piece.

Preferably, the second connecting piece comprises a first part and a second part which are connected up and down, the diameter of the first part is smaller than that of the second part, the upper surface of the first part is arranged close to the lower surface of the spray arm, and annular ribs arranged along the periphery of the water inlet sleeve are convexly arranged on the upper surface of the first part. Because the spray arm can float from top to bottom under the impact force of water in the cleaning process, when the above-mentioned structure can be in the spray arm come-down and contact with the second connecting piece, for the spray arm provides the support and reduces the area of contact between the two to reduce friction, improve the rotation smoothness of spray arm, and the structure of annular muscle gives the spray arm in the circumference and with balancing force, be favorable to the spray arm in time to adjust the rotation orbit, keep steady.

Preferably, the peripheral wall of the water inlet sleeve is provided with a limiting rib in an L-shaped structure, and correspondingly, the side wall of the first connecting piece is provided with a limiting groove for the limiting rib to be clamped in from top to bottom and to form limiting along with the circumferential rotation of the water inlet sleeve. The width of the vertical part of the limiting rib in the radial direction is smaller than that of the vertical part in the radial direction, the limiting groove is also of an L-shaped structure, the width of the vertical part of the L-shaped structure in the circumferential direction can be used for the limiting rib to be clamped into the limiting groove from top to bottom, the horizontal part of the L-shaped structure penetrates through the first connecting piece in the radial direction to be clamped into the limiting rib, and a notch which is sunken and used for clamping the vertical part of the limiting rib is formed in the inner wall of the first connecting piece at the end part of the horizontal part corresponding to the L-shaped structure. By adopting the structure, when the water inlet sleeve is assembled, the water inlet sleeve is inserted into the first connecting piece from top to bottom, the limiting ribs are aligned with the vertical parts of the L-shaped structure to enter the limiting grooves, then the first connecting piece is rotated, the transverse parts of the limiting ribs slide into the transverse parts of the limiting grooves, the vertical parts of the limiting ribs are clamped into the gaps, the locking direction is consistent with the rotating direction of the spray arm, therefore, the water inlet sleeve is kept not to be loosened in the rotation of the spray arm, and the locking reliability between the water inlet sleeve and the first connecting piece is improved.

The utility model provides a cleaning machine, includes the box, the bottom half is provided with the return water region of indent, and the top in this return water region is covered with the filter, still includes above-mentioned spray arm mounting structure that is used for the cleaning machine, the water pump is located in the return water region and has the water sucking mouth that is linked together with the return water region, the spray arm is located on the filter.

Compared with the prior art, the utility model has the advantages that: the spray arm is rotationally connected with the water pump through the first connecting piece and the second connecting piece, and the first connecting piece and the second connecting piece are mutually propped and rotationally matched with each other in the up-down direction, so that compared with the existing snap ring matching mode, the force matching surface is large and stable, and the rotation stability of the spray arm is improved.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present utility model;

FIG. 2 is a cross-sectional view of FIG. 1;

FIG. 3 is an exploded view of FIG. 1;

FIG. 4 is a schematic structural view of a first connecting member according to an embodiment of the present utility model;

fig. 5 is a schematic structural view of a shower arm according to an embodiment of the present utility model.

Detailed Description

The utility model is described in further detail below with reference to the embodiments of the drawings.

As shown in fig. 1 to 5, the shower arm mounting structure for a washer of the present embodiment mainly relates to the assembly and mounting between a water pump 1 and a shower arm 2 in a dishwasher using an open water flow system.

The water pump 1 and the spray arm 2 are both arranged in the washing cavity of the cleaning machine and are arranged close to the bottom of the washing cavity. A water outlet 11 and a water outlet sleeve 12 extending upwards around the water outlet 11 are arranged on the top wall of the water pump 1, a water inlet 21 and a water inlet sleeve 22 extending downwards around the water inlet 21 and inserted in the water outlet sleeve 12 are arranged on the bottom wall of the spray arm 2, and the spray arm 2 can be rotationally restrained on the water pump 1 through a first connecting piece 3 and a second connecting piece 4; the first connecting piece 3 is sleeved on the periphery of the water inlet sleeve 22, the first connecting piece and the water inlet sleeve synchronously rotate, the second connecting piece 4 is sleeved on the periphery of the first connecting piece 3, the first connecting piece and the second connecting piece form a matching surface 100 which is pressed up and down and can be matched in a rotating mode, and the second connecting piece 4 is detachably locked on the water pump 1. In the assembled state, a matching surface 100 is formed between the upper end surface of the first connecting piece 3 and the inner top wall of the second connecting piece 4, and the lower end surface of the first connecting piece 3 is arranged corresponding to the top of the water outlet sleeve 22.

The second connecting member 4 includes a top wall 41 and an annular wall 42 extending downward from an edge of the top wall 41, and in the assembled state, the top wall 41, the annular wall 42 and the top wall of the water pump 1 of the second connecting member 4 enclose a surrounding cavity 200 that surrounds the water outlet jacket 12 and the water inlet jacket 22. The second connecting piece 4 is utilized to form the surrounding cavity 200 which surrounds the rotating fit structure of the spray arm 2, so that on one hand, residues are prevented from being detained in an assembly gap to influence the rotating stability of the spray arm 2, and on the other hand, the spray arm 2 is restrained in a relatively closed cavity in a leakage mode, the pressure in the cavity is relatively stable, the influence of the washing cavity is small, the leakage flow is reduced, the energy loss of water flow is reduced, and higher jet lift and water pressure are maintained.

In this embodiment, an assembling gap 300 capable of being in running fit is formed between the water inlet sleeve 22 and the water outlet sleeve 12, and the lower surface of the first connecting member 3 is arranged corresponding to the top edge of the water outlet sleeve 12 and forms a leakage blocking surface of the assembling gap 300. By adopting the structure, the dynamic blocking is carried out at the position of the drainage outlet in an aligned manner, so that the dynamic blocking is beneficial to coacting with the surrounding cavity 200, the drainage flow is further reduced, and in fact, after the double drainage protection is adopted, the situation that the assembly gap 300 is full of water is basically avoided, the water filled in the assembly gap 300 has a sealing effect on one hand, and has a rotating lubrication effect on the other hand, so that the rotating stability of the spray arm is improved on the basis of meeting the requirement of small flow loss.

The first supporting rib 221 which can be in rotary fit with the inner wall of the water outlet sleeve 12 protrudes from the peripheral wall of the water inlet sleeve 22, the rotary fit area between the water inlet sleeve 22 and the water outlet sleeve 12 can be reduced, friction is reduced, and the rotation smoothness of the spray arm is improved. The top wall of the spray arm 2 inside the water outlet jacket 12 constitutes a step 121 for restraining the downward movement of the water inlet jacket 22.

The central part of the top wall of the second connecting piece 4 is provided with an assembling opening 43 for the water inlet sleeve 22 to pass through, the inner top wall of the second connecting piece 4 is provided with an assembling ring 44 extending downwards from the edge of the assembling opening 43, and the lower surface of the assembling ring 44 is in rotary fit with the upper end surface of the first connecting piece 3 to form a matching surface 100. With such a structure, on the basis of forming a large-area rotation mating surface, rotation interference which may occur between the second connecting member 4 and the first connecting member 3 is eliminated, so as to ensure smooth relative rotation of the two.

The second supporting rib 31 extending vertically upwards is arranged on the inner peripheral wall of the first connecting piece 3, the outer side of the second supporting rib 31 is close to the inner wall of the assembly ring 44 and is arranged at intervals between the inner side and the outer wall of the water inlet sleeve 22, and the structure can radially limit the first connecting piece 3 and the second connecting piece 4 and improve the rotation stability between the first connecting piece 3 and the second connecting piece 4.

The second connecting piece 4 comprises a first part 401 and a second part 402 which are connected up and down, the diameter of the first part 401 is smaller than that of the second part 402, the upper surface of the first part 401 is arranged close to the lower surface of the spray arm 2, and annular ribs 45 arranged along the periphery of the water inlet sleeve 22 are arranged on the upper surface of the first part 401 in a protruding mode. Because the spray arm 2 can float from top to bottom under the impact force of water in the cleaning process, when the spray arm 2 floats downwards and contacts with the second connecting piece 4, the structure can provide support for the spray arm 2 to reduce the contact area between the spray arm 2 and the second connecting piece, so that friction is reduced, the rotation smoothness of the spray arm 2 is improved, and the structure of the annular rib gives the spray arm 2 a balance force in the circumferential direction, so that the spray arm 2 can adjust the rotation track in time and keep stable.

In this embodiment, the peripheral wall of the water inlet sleeve 22 is provided with a limiting rib 222 with an L-shaped structure, and correspondingly, the side wall of the first connecting member 3 is provided with a limiting groove 32 in which the limiting rib 222 is clamped from top to bottom and rotates along with the circumferential direction of the water inlet sleeve 22 to form a limit. The width of the vertical portion 2221 of the limiting rib 222 in the radial direction is smaller than that of the transverse portion 2222, the limiting groove 32 is also of an L-shaped structure, the width of the vertical portion 321 of the L-shaped structure in the circumferential direction can be used for the limiting rib 222 to be clamped into the vertical portion 2221 of the limiting rib 222 from top to bottom, the transverse portion 322 of the L-shaped structure radially penetrates through the first connecting piece 3 to be clamped into the transverse portion 2222 of the limiting rib 222, and a notch 33 which is recessed and used for clamping the vertical portion 2222 of the limiting rib 222 is formed on the inner wall of the first connecting piece 3 at the end part of the transverse portion 322 of the corresponding L-shaped structure. With the adoption of the structure, when the water inlet sleeve 22 is assembled, the water inlet sleeve is inserted into the first connecting piece 3 from top to bottom, the limiting ribs 222 are aligned with the vertical parts 321 of the L-shaped structure to enter the limiting grooves 32, then the first connecting piece 3 is rotated, the transverse parts 2222 of the limiting ribs 222 slide into the transverse parts of the limiting grooves 32, the vertical parts 2221 of the limiting ribs 222 are clamped into the notches 33, the locking direction is consistent with the rotating direction of the spray arm 2, so that the spray arm 2 is prevented from loosening in rotation, and the locking reliability between the water inlet sleeve 22 and the first connecting piece 3 is improved.

The spray arm 2 and the water pump 1 are rotationally connected through the first connecting piece 3 and the second connecting piece 4, and as the first connecting piece 3 and the second connecting piece 4 adopt the matching surfaces 100 which are mutually propped and rotationally matched in the up-down direction, compared with the existing snap ring matching mode, the force matching surface is large and stable, thereby being beneficial to improving the rotation stability of the spray arm 2; meanwhile, the first connecting piece 3 after assembly is always positioned at the top port of the water outlet sleeve 12 to form a leakage flow blocking surface, and when the water pressure of the spray arm 2 is high and leakage flow occurs, the leakage flow can be blocked by combining the surrounding cavity 200 structure formed by the second connecting piece 4, so that the leakage flow rate is reduced, and the fluid energy loss is reduced.

In the description and claims of the present utility model, terms indicating directions, such as "front", "rear", "upper", "lower", "left", "right", "side", "top", "bottom", etc., are used to describe various example structural parts and elements of the present utility model, but these terms are used herein for convenience of description only and are determined based on the example orientations shown in the drawings. Because the disclosed embodiments of the utility model may be arranged in a variety of orientations, the directional terminology is used for purposes of illustration and is in no way limiting, such as "upper" and "lower" are not necessarily limited to being in a direction opposite or coincident with the direction of gravity.

Claims

1. A spray arm mounting structure for cleaning machine, including locating water pump (1) and spray arm (2) in the cleaning machine, so open on roof (41) of water pump (1) has delivery port (11) and around the play water jacket (12) of this delivery port (11) upwards extension, open on the diapire of spray arm (2) has water inlet (21) and around this water inlet (21) downwardly extending and insert water jacket (22) in play water jacket (12), its characterized in that: the spray arm (2) is rotationally restrained on the water pump (1) through a first connecting piece (3) and a second connecting piece (4); the water pump is characterized in that the first connecting piece (3) is sleeved on the periphery of the water inlet sleeve (22) and synchronously rotates, the second connecting piece (4) is sleeved on the periphery of the first connecting piece (3) and forms a matching surface (100) which is pressed up and down and can be in running fit, and the second connecting piece (4) is detachably locked on the water pump (1).

2. The shower arm mounting structure for a washer of claim 1, wherein: in the assembled state, the matching surface (100) is formed between the upper end surface of the first connecting piece (3) and the inner top wall (41) of the second connecting piece (4), and the lower end surface of the first connecting piece (3) is arranged corresponding to the top of the water outlet sleeve (12).

3. The shower arm mounting structure for a washer of claim 2, wherein: the second connecting piece (4) comprises a top wall (41) and a ring wall (42) extending downwards from the edge of the top wall (41), and in the assembled state, the top wall (41), the ring wall (42) and the top wall of the water pump (1) of the second connecting piece (4) enclose a surrounding cavity (200) which surrounds the water outlet sleeve (12) and the water inlet sleeve (22).

4. A spray arm mounting structure for a cleaning machine as defined in claim 3, wherein: an assembling gap (300) capable of being in running fit is formed between the water inlet sleeve (22) and the water outlet sleeve (12), and the lower surface of the first connecting piece (3) is arranged corresponding to the top edge of the water outlet sleeve (12) and forms a leakage flow blocking surface of the assembling gap (300).

5. The shower arm mounting structure for a washer of claim 4, wherein: the outer peripheral wall of the water inlet sleeve (22) is provided with first supporting ribs (221) which can be in rotary fit with the inner wall of the water outlet sleeve (12) in a protruding mode.

6. The shower arm mounting structure for a washer of claim 4, wherein: the top wall (41) of the spray arm (2) at the inner side of the water outlet sleeve (12) forms a step (121) for restraining the downward movement of the water inlet sleeve (22).

7. A spray arm mounting structure for a cleaning machine as defined in claim 3, wherein: the central part of the top wall (41) of the second connecting piece (4) is provided with an assembly opening (43) through which the water inlet sleeve (22) passes, the inner top wall (41) of the second connecting piece (4) is provided with an assembly ring (44) extending downwards from the edge of the assembly opening (43), and the lower surface of the assembly ring (44) is in rotary fit with the upper end surface of the first connecting piece (3) to form the matching surface (100).

8. The shower arm mounting structure for a washer of claim 7, wherein: the inner peripheral wall of the first connecting piece (3) is provided with a second supporting rib (31) extending vertically upwards, the outer side of the second supporting rib (31) is close to the inner wall of the assembly ring (44), and the inner side of the second supporting rib is arranged at intervals with the outer wall of the water inlet sleeve (22).

9. A spray arm mounting structure for a cleaning machine as defined in claim 3, wherein: the second connecting piece (4) comprises a first part (401) and a second part (402) which are connected up and down, the diameter of the first part (401) is smaller than that of the second part (402), the upper surface of the first part (401) is close to the lower surface of the spray arm (2), and annular ribs (45) arranged along the periphery of the water inlet sleeve (22) are arranged on the upper surface of the first part (401) in a protruding mode.

10. The shower arm mounting structure for a washer of any one of claims 1-9, wherein: limiting ribs (222) with L-shaped structures are arranged on the peripheral wall of the water inlet sleeve (22), and correspondingly, limiting grooves (32) for the limiting ribs (222) to be clamped in from top to bottom and to rotate along with the circumferential direction of the water inlet sleeve (22) are formed in the side wall of the first connecting piece (3).

11. The shower arm mounting structure for a washer of claim 10, wherein: the width of the vertical part of the limiting rib (222) in the radial direction is smaller than that of the horizontal part in the radial direction, the limiting groove (32) is of an L-shaped structure, the width of the vertical part of the L-shaped structure in the circumferential direction can be used for the limiting rib (222) to be clamped into the limiting groove from top to bottom, the horizontal part of the L-shaped structure radially penetrates through along the first connecting piece (3) to be clamped into the limiting rib (222), and a notch (33) for clamping the vertical part of the limiting rib (222) is formed in the inner wall of the first connecting piece (3) at the end part of the corresponding horizontal part of the L-shaped structure.

12. The utility model provides a cleaning machine, includes the box, the bottom half is provided with the return water region of indent, and this return water region's top covers has the filter, its characterized in that: further comprising the shower arm mounting structure for a cleaning machine according to any one of claims 1 to 11, the water pump being provided in the return water area and having a water suction port communicating with the return water area, the shower arm being located above the filter plate.