CN112963535B

CN112963535B - Washing arm with rotary sealing structure

Info

Publication number: CN112963535B
Application number: CN202110144257.4A
Authority: CN
Inventors: 高恒瑞; 李刚锋; 王彦宇
Original assignee: Beijing Honganshuidi Technology Development Co ltd
Current assignee: Beijing Honganshuidi Technology Development Co ltd
Priority date: 2021-02-02
Filing date: 2021-02-02
Publication date: 2021-12-14
Anticipated expiration: 2041-02-02
Also published as: CN112963535A

Abstract

The application relates to a wash arm with rotary seal structure, including swinging boom, sealed bearing, water diversion axle sleeve, water diversion axis body and connecting portion. The spray chamber is formed between the upper part of the washing arm and the lower part of the washing arm of the rotating arm, the water distribution shaft sleeve is fixedly arranged in the spray chamber, the sealing bearing sleeve is sleeved on the water distribution shaft sleeve to form sealing combination and form an assembly body with the rotating arm, and the assembly body is rotatably connected to the water distribution shaft body. The pole portion clearance fit of sealed bearing inner race and the axle body that divides water forms first sealing surface, the inner wall interference fit of sealed bearing outer race and the axle body that divides water forms the second sealing surface, the flange size of bearing outer race cooperatees with the outer wall size of the axle body that divides water, form the third sealing surface, the head of the axle body that divides water is equipped with the recess, sealed bearing's flange lateral surface gomphosis is connected to the recess and forms the fourth sealing surface, four sealing surfaces constitute the sealed circuit that rivers blockked, the leakproofness of washing the arm has been improved effectively, the beneficial effect of reduction seepage has been played.

Description

Washing arm with rotary sealing structure

Technical Field

The application relates to the field of dish washing machines, in particular to a washing arm with a rotary sealing structure.

Background

The dish washer is equipment capable of automatically cleaning tableware, and is strong in cleaning force and high in working efficiency, and can effectively sterilize and disinfect the tableware when the tableware is cleaned, so that the dish washer is widely applied to the fields of families and commercial catering.

In the dishwasher sector, in particular in the commercial dishwasher sector, rinsing arms are an essential component which, after a main wash, wash the dishes with fresh water, a process known as rinsing. In the rinsing process, the washing arm and the water distribution shaft sleeve rotate under the action of water flow with certain pressure and specific orientation, and the water flow washes all corners of the tableware, so that the tableware is cleaned. The arm is washed in the process, the water distribution shaft sleeve and the rotating shaft can rotate relatively, in order to enable the arm to work in acid-base high-temperature water environment, the rotating shaft and the water distribution shaft sleeve which are made of stainless steel are adopted as rotating supports in the common technical scheme, and in order to ensure the smooth rotation of the arm, a larger gap (generally more than 0.1mm on one side) is reserved between the shaft and the water distribution shaft sleeve. However, the large gap will result in large leakage of clean water from the gap, resulting in waste of clean water and reduced rinsing effect.

Disclosure of Invention

In order to solve the problems, the purpose of the application is to provide a washing arm with a rotary sealing structure, so as to solve the problems that the existing washing arm and the existing water diversion shaft sleeve in the background technology leak in the process of rotating around a shaft, so that the clear water is wasted and the rinsing effect is reduced.

In order to achieve the above purpose, the present application provides the following technical solutions: the utility model provides a wash arm with rotation seal structure, includes swinging boom, sealed bearing, the axle sleeve that divides water, the axis body and connecting portion of dividing, the swinging boom is including washing arm upper portion and washing arm lower part, wash and form between arm upper portion and the washing arm lower part and spout the chamber, spout the intracavity fixed axle sleeve that divides water that is equipped with, the outer wall of the axle sleeve that divides water is equipped with the trompil that divides water and link up with spouting the chamber, sealed bearing cover is established form sealed combination and constitute the assembly body with the swinging boom on the axle sleeve that divides water, assembly body rotationally connects the axis body that divides water, the axis body that divides water has the axis body head that divides water and divides water axis body pole portion, divides water axis body pole portion to be equipped with the trompil that divides water and lead to the perforation and link to each other with the water source to through connecting portion and assembly body coupling.

Preferably, the upper part of the washing arm, the lower part of the washing arm and the water distribution shaft sleeve are connected into a whole through a metal plate flanging in a pressing mode.

Preferably, the sealed bearing is made of plastic, and the water diversion shaft sleeve and the water diversion shaft body are made of stainless steel.

Preferably, the sealed bearing comprises a bearing inner ring and a bearing outer ring, the bearing outer ring is provided with a flange, and the flange extends along the axial direction of the sealed bearing.

Preferably, the outer ring of the sealing bearing and the inner ring of the bearing are provided with water through holes which are transversely coaxial with the water distribution holes of the water distribution shaft sleeve and are matched with the water distribution shaft sleeve in size, and the water through holes are communicated with the water distribution shaft sleeve and the rotating arm spraying cavity.

Preferably, the bearing inner ring is in clearance fit with the rod part of the water diversion shaft body to form a first sealing surface, the bearing outer ring is in interference fit with the inner surface of the inner wall of the water diversion shaft sleeve to form a second sealing surface, the size of the flange of the bearing outer ring is matched with the size of the outer wall of the water diversion shaft sleeve, and the flange of the bearing outer ring and the outer surface of the inner wall of the water diversion shaft sleeve form a third sealing surface.

Preferably, the head of the water diversion shaft body is provided with a groove, and the outer side face of the flange of the sealing bearing is embedded and connected into the groove with a gap, so that a fourth sealing surface is formed.

Preferably, the clearance fit means that the fit unilateral clearance is 0.02-0.05 mm.

Preferably, the clearance fit has a one-sided clearance of 0.02 mm.

Preferably, the clearance fit has a one-sided clearance of 0.05 mm.

Compared with the prior art, the beneficial effect of this application includes:

1. through will wash arm and divide water axle sleeve fixed connection as an organic whole, sealed bearing housing establishes to dividing on the axle sleeve, makes its whole can carry out the integration around dividing the axle body and rotate on the one hand, reduces the kinetic energy loss that the part connection too much caused, strengthens the rinsing effect, reduces production and maintenance cost. On the other hand, the sealing bearing is in interference fit with the water diversion shaft sleeve and forms a tight sealing surface in clearance fit with the water diversion shaft body, and the purpose of reducing leakage is achieved.

2. This application both can adopt double seal bearing, also can reach the purpose of preventing leaking through the single seal bearing who is equipped with logical water trompil on seal bearing.

3. In addition, the outer side surface of the flange of the sealing bearing on one side is embedded and connected into the groove of the head part of the shunt shaft body to form a sealing surface, and a sealing line for preventing leakage is formed by the sealing surface and other sealing surfaces, so that the leakage amount is further reduced.

Drawings

FIG. 1 is a schematic view of a wash arm with a rotary seal structure according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a wash arm assembly with a rotary seal arrangement according to an embodiment of the present application;

fig. 3 is a schematic structural view of a water-dividing shaft according to an embodiment of the present disclosure;

fig. 4 is a schematic structural view of a water distribution shaft sleeve according to an embodiment of the present application;

FIG. 5 is a schematic view of a seal configuration according to an embodiment of the present application;

FIG. 6 is a top view of a seal bearing structure according to an embodiment of the present application;

FIG. 7 is a cross-sectional view of a seal bearing configuration according to an embodiment of the present application;

FIG. 8 is a perspective view of a seal bearing according to an embodiment of the present disclosure;

FIG. 9 is a perspective view of a sealed bearing according to an embodiment of the present application from a parallel perspective;

FIG. 10 is a schematic view of an alternative wash arm configuration with a rotary seal configuration in accordance with an embodiment of the present application;

FIG. 11 is a schematic view of a single plastic bearing construction according to an embodiment of the present application;

FIG. 12 is a schematic view of another sealing configuration according to an embodiment of the present application;

in the figure: 1. a water diversion shaft body; 11. a water diversion shaft body head part; 12. a water diversion shaft body rod part; 13. opening holes in a water diversion mode; 14. external threads of the water diversion shaft body; 15. water inlet perforation; 2. sealing the bearing; 21. a bearing inner race; 22. a bearing outer race; 23. a flange; 231. a flange outer ring; 232. a flange inner ring; 233. a flange outer side surface; 24. the opening of the bearing; 3. washing the upper part of the arm; 4. washing the lower part of the arm; 5. a water diversion shaft sleeve; 51. the outer wall of the water diversion shaft sleeve; 52. the inner wall of the water diversion shaft sleeve; 53. opening holes in a water diversion mode; 6. a connecting portion; first, second, third, and fourth sealing surfaces (i.e., leakage paths)

Detailed Description

To further explain the technical means and effects adopted by the present application to achieve the intended purpose, the following detailed description is given to the specific structure and effects of the present application in conjunction with the accompanying drawings and embodiments. Hereinafter, the terms "first", "second", … …, etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated and not as limiting the order of the technical features. Thus, features defined as "first," "second," … …, etc. may explicitly or implicitly include one or more of such features. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

Example 1

The embodiment of the application provides a wash arm with rotary seal structure, as shown in fig. 1-2, the wash arm includes wash arm upper portion 3 and wash arm lower part 4, wash arm spraying cavity between arm upper portion 3 and wash arm lower part 4, and the fixed axle sleeve 5 that divides that is equipped with in spraying cavity intermediate position. In order to reduce the increase of leakage paths caused by excessive connection of parts, the upper part 3 and the lower part 4 of the washing arm and the water diversion shaft sleeve 5 are pressed into a whole through metal plate flanging. Referring to fig. 3, the water diversion shaft body 1 includes a water diversion shaft body head 11 and a water diversion shaft body rod part 12, a water diversion opening 13 is arranged on the outer wall of the water diversion shaft body rod part 12, and a water inlet perforation 15 is arranged in the center of the water diversion shaft body and connected with a water source. Referring to fig. 4, the water diversion shaft sleeve 5 includes a water diversion shaft sleeve outer wall 51 and a water diversion shaft sleeve inner wall 52, a plurality of water diversion openings 53 are uniformly arranged on the periphery of the water diversion shaft sleeve outer wall 51, in this example, 4 water diversion openings 53 with equal size are correspondingly arranged on the periphery of the water diversion shaft sleeve outer wall 51 in front, back, left and right directions, so as to realize the communication with the spray chamber. Referring to fig. 4-5, the water diversion opening 53 on the outer wall 51 of the water diversion shaft sleeve is transversely coaxial with the water diversion opening 13 on the outer wall of the water diversion shaft body rod part 12, the diameter size of the water diversion opening is matched, water flow enters from the through hole 15 and sequentially enters the spray cavity through the water diversion opening 13 and the water diversion opening 53, due to the reaction moment of the sprayed water flow, the water diversion shaft sleeve 5 and the washing arm rotate under the action of water flow with certain pressure and specific orientation, and leakage paths I, II, III and IV (namely, the first sealing surface, II, III and IV sealing surfaces) exist between the water diversion shaft sleeve 5 and the water diversion shaft body 1 in the rotation process.

The double plastic sealed bearings 2 are arranged, and the sealed bearings 2 are made of wear-resistant, self-lubricating, acid-base-resistant and high-temperature-resistant plastic materials, such as PI/PPS materials and H2 materials of the Yige company. Referring to fig. 6-9, the sealed bearing comprises a bearing inner ring 21, a bearing outer ring 22 and a bearing flange 23, wherein the sealed bearing outer ring 22 is provided with the flange 23, and the flange 23 extends in the axial direction of the sealed bearing and comprises a flange outer ring 231 and a flange inner ring 232.

Referring to fig. 5-9, the sealing bearings 2 are sleeved on the upper and lower ends of the water diversion shaft sleeve 5 to form a sealing combination, and are rotatably connected to the water diversion shaft body 1. The sealing bearing inner ring 21 is sleeved outside the water diversion shaft body rod part 12 to form a first sealing surface, the bearing inner ring 21 is matched with the water diversion shaft body rod part 12 by adopting a minimum clearance, the clearance on one side of the matching is 0.02-0.05mm, and the matching clearance can not only enhance the rotation flexibility of the washing arm, but also play a role of preventing leakage; the outer ring 22 of the sealing bearing and the inner side surface of the inner wall 52 of the water diversion shaft sleeve adopt interference fit to form a second sealing surface, and the sealing bearing 2 is tightly attached to the water diversion shaft sleeve 5 through the interference fit and rotates around the water diversion shaft body 1 under the action of the counter torque of the water jet as a whole; the size of a flange inner ring 232 of the sealing bearing 2 is matched with the size of the inner wall 52 of the water diversion shaft sleeve, the inner ring 232 is wrapped on the outer side surface of the inner wall 52 of the water diversion shaft sleeve to form a local third sealing surface, and meanwhile, the flange 23 can further fix the sealing bearing 2 on the water diversion shaft sleeve 5; the surface of the lower end of the water diversion shaft body head 11 is provided with a groove which is embedded with the outer side 233 of the flange surface of the sealing bearing 2, and meanwhile, a gap is reserved for ensuring rotation, the size of the gap is 0.03-0.05mm, and a fourth sealing surface is formed. The first sealing surface, the second sealing surface, the third sealing surface and the fourth sealing surface form a sealing circuit for preventing water flow from leaking, and the leakage amount is further reduced.

Referring to fig. 1 to 3, a seal bearing 2, a washing arm upper part 3, a washing arm lower part 4 and a water diversion shaft sleeve 5 are inserted on a water diversion shaft body 1. Divide the water shaft body pole portion 12 outside evenly to be equipped with and divide water shaft body external screw thread 14, and with 6 internal thread looks adaptations of connecting portion, through connecting portion 6 with sealed bearing 2, wash arm upper portion 3, wash arm lower part 4, divide water shaft sleeve 5 fastening spacing on water shaft body pole portion 12.

The structure has the anti-leakage sealing effect when the washing arm rotates. Table 1 shows the double plastic bearing clearance versus leakage. Under the condition that other structures and parameters are the same and the same experimental conditions are adopted, the leakage amount is about 51ml when the matched unilateral clearance is 0.02mm, the leakage amount is about 75ml when the matched unilateral clearance is 0.05mm, and the leakage amount is about 140ml when the plastic sealed bearing is not adopted, so that the bearing inner ring 21 and the water diversion shaft body rod part 12 are in minimum clearance fit, and the matched unilateral clearance is 0.02-0.05mm, and the excellent leakage-proof effect can be realized.

TABLE 1 corresponding table for gap and leakage of double plastic bearings

Example 2

Compared with embodiment 1, the present embodiment adopts a single plastic sealed bearing, and referring to fig. 11, the sealed bearing includes a bearing inner ring 21, a bearing outer ring 22 and a bearing flange 23, wherein the sealed bearing outer ring 22 is provided with the flange 23, and the flange 23 extends in an axial direction of the sealed bearing, and includes a flange outer ring 231 and a flange inner ring 232. The longitudinal lengths of the sealing bearing inner ring 21 and the bearing outer ring 22 are matched with the longitudinal length of the water diversion shaft sleeve 5, and the sealing bearing inner ring 21 and the bearing outer ring 22 are provided with water through holes 24 which are transversely coaxial with the water diversion holes 53 of the water diversion shaft sleeve 5 and are matched with the water diversion holes 53 in size, so that sequential communication with the water diversion shaft sleeve 5 and the rotary arm spraying cavity can be realized.

Referring to fig. 10-12, the sealing bearing inner ring 21 is sleeved outside the rod part 12 of the water diversion shaft body, the bearing inner ring 21 and the rod part 12 of the water diversion shaft body are in minimum clearance fit, and the clearance on one side of the fit is 0.02-0.05mm, so as to form a first sealing surface; the outer ring 22 of the sealing bearing is in interference fit with the inner side surface of the inner wall 52 of the water diversion shaft sleeve 5 to form a second sealing surface; the size of the flange outer ring 231 is matched with that of the outer wall 51 of the water diversion shaft sleeve 5, and the inner ring 232 and the outer side surface of the inner wall 52 of the water diversion shaft sleeve form a local third sealing surface; the surface of the lower end of the water diversion shaft body head 11 is provided with a groove which is embedded with the outer side 233 of the flange surface of the sealing bearing 2, and meanwhile, a gap is reserved for ensuring rotation, the size of the gap is 0.03-0.05mm, and a fourth sealing surface is formed. The connecting part 6 fastens and limits the sealing bearing 2, the upper washing arm part 3, the lower washing arm part 4 and the water diversion shaft sleeve 5 on the water diversion shaft body rod part 12.

The structure of washing the arm has further been simplified to above-mentioned structure, and the assembly is more convenient, plays the sealed effect that reduces the seepage when washing the arm and rotating. Table 2 shows the single plastic bearing clearance versus leakage. Under the condition that other structures and parameters are the same and the same experimental conditions are adopted, when a single plastic sealing bearing is adopted, the single side of the matching clearance is 0.02mm, the leakage amount is about 58ml, when the single side of the matching clearance is 0.035mm, the leakage amount is about 72ml, when the single side of the matching clearance is 0.05mm, the leakage amount is about 82ml, and when the plastic bearing is not adopted, the leakage amount is about 136ml, so that the bearing inner ring 21 and the water distributing shaft body rod part 12 adopt minimum clearance matching, and the single side of the matching clearance is 0.02mm-0.05mm, and excellent leakage prevention effect can be realized.

TABLE 2 single plastic bearing gap and leakage quantity corresponding table

The foregoing shows and describes the general principles, essential features, and advantages of the application. It will be understood by those skilled in the art that the present application is not limited to the embodiments described above, which are presented solely for purposes of illustrating the principles of the application and that various changes and modifications may be made without departing from the spirit and scope of the application and these changes and modifications are intended to be within the scope of the application as claimed.

Claims

1. The utility model provides a wash arm with rotary seal structure, includes swinging boom, sealed bearing, the axle sleeve that divides water, the axis body that divides water and connecting portion, its characterized in that, the swinging boom is including washing arm upper portion and washing arm lower part, wash and form between arm upper portion and the washing arm lower part and spout the chamber, spout the intracavity fixed axle sleeve that divides water that is equipped with, divide water axle sleeve outer wall to be equipped with the trompil that divides water and link up with spouting the chamber, sealed bearing cover is established form sealed combination and constitute the assembly body with the swinging boom on the axle sleeve that divides water, assembly body rotationally connects the axis body that divides water, divide the axis body to have the axis body head that divides water and divide water axis body pole portion, divide water axis body pole portion to be equipped with the trompil that divides water and lead to the water perforation and link to each other with the water source to through connecting portion and assembly body coupling.

2. The washing arm according to claim 1, wherein the upper part of the washing arm, the lower part of the washing arm and the water-dividing shaft sleeve are connected into a whole through a sheet metal flanging in a pressing manner.

3. The wash arm according to claim 1 or 2, wherein said sealed bearing is made of plastic and the water-dividing shaft sleeve and the water-dividing shaft body are made of stainless steel.

4. The wash arm according to claim 1, characterized in that the sealed bearing comprises an inner bearing ring and an outer bearing ring, the outer bearing ring being provided with a flange, which flange extends in the axial direction of the sealed bearing.

5. The wash arm according to claim 4, wherein the bearing inner ring and the bearing outer ring are provided with water through openings which are transversely coaxial and matched in size with the water diversion openings of the water diversion shaft sleeve, and the water through openings are communicated with the water diversion shaft sleeve.

6. The wash arm according to claim 4 or 5, characterized in that the bearing inner ring is in clearance fit with the rod part of the water diversion shaft body to form a first sealing surface, the bearing outer ring is in interference fit with the inner surface of the inner wall of the water diversion shaft sleeve to form a second sealing surface, the size of the flange inner ring of the bearing outer ring is matched with the size of the inner wall of the water diversion shaft sleeve, and the flange inner ring and the outer surface of the inner wall of the water diversion shaft sleeve form a third sealing surface.

7. The wash arm according to claim 1, wherein the head of the shunt shaft body is provided with a groove, and the flange outer side surface of the seal bearing is fitted into the groove with a gap to form a fourth seal surface.

8. The wash arm of claim 6, wherein said clearance fit unilateral clearance is 0.02mm-0.05 mm.

9. The wash arm according to claim 6, wherein said clearance fit unilateral gap is 0.02 mm.

10. The wash arm of claim 6, wherein said clearance fit unilateral clearance is 0.05 mm.