阅读说明：本技术 一种洗碗机用喷淋臂及其加工方法 (Spraying arm for dish-washing machine and processing method thereof ) 是由 陈旭 黄卫斌 黄安奎 张海波 张猛 钟将 彭毓林 于 2021-09-01 设计创作，主要内容包括：本发明提供了一种洗碗机用喷淋臂及其加工方法,包括接头、喷臂上壳和喷臂下壳,喷臂上壳的中心开通接口,接头由接口向上伸出,喷臂上壳和喷臂下壳上下扣合形成中空的喷洒腔,喷臂上壳具有平面顶壁,平面顶壁的周边向下弯折长折边,喷臂下壳具有下凹壳体,下凹壳体的周边具有平面边沿,平面边沿的外周向下弯折短折边,喷臂上壳和喷臂下壳上下扣合状态下,使平面边沿与平面顶壁相贴合,长折边贴合于短折边的外周壁,长折边超出短折边的底圈部分向内弯折形成包边,包边贴合短折边的内周壁。本发明为纵向叠边咬合,使得包边形成内侧隐藏结构,消除包边起皱问题,使得整体外型线条流畅,增强简洁美观性。(The invention provides a spray arm for a dish-washing machine and a processing method thereof, and the spray arm comprises a joint, a spray arm upper shell and a spray arm lower shell, wherein the center of the spray arm upper shell is provided with an interface, the joint extends upwards from the interface, the spray arm upper shell and the spray arm lower shell are buckled up and down to form a hollow spray cavity, the spray arm upper shell is provided with a plane top wall, the periphery of the plane top wall is bent downwards to form a long folded edge, the spray arm lower shell is provided with a concave shell, the periphery of the concave shell is provided with a plane edge, the periphery of the plane edge is bent downwards to form a short folded edge, the plane edge is jointed with the plane top wall under the state that the spray arm upper shell and the spray arm lower shell are buckled up and down, the long folded edge is jointed with the peripheral wall of the short folded edge, the part of the long folded edge, which exceeds the bottom part of the short folded edge, is bent inwards to form a folded edge, and the folded edge is jointed with the inner peripheral wall of the short folded edge. The invention is longitudinally overlapped edge occlusion, so that the edge forms an inner hidden structure, the wrinkling problem of the edge is eliminated, the overall appearance line is smooth, and the simplicity and the attractiveness are enhanced.)

1. A spray arm for a dish washer comprises a joint, a spray arm upper shell and a spray arm lower shell, wherein the center of the spray arm upper shell is provided with a connector, the joint extends upwards from the connector, it is characterized in that the upper spraying arm shell and the lower spraying arm shell are buckled up and down to form a hollow spraying cavity, the upper spray arm shell is provided with a plane top wall, the periphery of the plane top wall is bent downwards to form a long folded edge, the lower spray arm shell is provided with a lower concave shell, the periphery of the lower concave shell is provided with a plane edge, the periphery of the plane edge is bent downwards to form a short folded edge, the upper spraying arm shell and the lower spraying arm shell are buckled up and down to ensure that the plane edge is attached to the plane top wall, the long folding edge is attached to the outer peripheral wall of the short folding edge, the long folding edge exceeds the bottom ring part of the short folding edge and is bent inwards to form a covered edge, and the covered edge is attached to the inner peripheral wall of the short folding edge.

2. The spray arm of claim 1, wherein the joint comprises a through cylinder, an opening guide port is fixedly connected to a bottom port of the through cylinder, and the through cylinder penetrates out of a port of the upper shell of the spray arm from bottom to top, so that the guide port is clamped in the spray cavity and clings to the inner wall of the upper shell of the spray arm.

3. The spray arm of claim 2, wherein the spray arm upper shell and the spray arm lower shell are both in the shape of a long-strip shell, the flow guide opening of the joint is a rectangular sheet body, and the spray cavity is a long-strip cavity.

4. The spray arm for the dish washer according to claim 1, wherein a plurality of spray nozzles are uniformly formed on the planar top wall of the spray arm upper shell, and the plurality of spray nozzles are communicated with the spray cavity.

5. The spray arm for the dish washer according to claim 1, wherein the planar top wall of the spray arm upper shell is transitionally connected with the long folded edge through an arc chamfer, and the bending angle range of the arc chamfer is 80-135 degrees; the long folded edge of the upper shell of the spray arm is in transition connection with the covered edge through an arc corner, and the bending angle of the arc corner is 360 degrees.

6. The spray arm for the dishwasher of claim 1, wherein the lower concave shell of the lower spray arm shell is transitionally connected with the planar edge by a circular arc chamfer, and the bending angle of the circular arc chamfer is less than 90 °; the plane edge of the lower spray arm casing is in transition connection with the short folded edge through an arc chamfer, and the bending angle range of the arc chamfer is 80-135 degrees.

7. A spray arm for a dishwasher of claim 1 wherein the length of the rim is less than the length of the short flap.

8. The spray arm for a dishwasher of claim 1 wherein said spray arm upper housing and said spray arm lower housing are both stainless steel housings.

9. The method of manufacturing a spray arm for a dishwasher of claim 1, comprising the steps of:

1) respectively manufacturing and molding the upper spray arm shell and the lower spray arm shell;

2) pressing the joint into the interface of the upper shell of the spray arm through a hand press to form fixed connection;

3) the upper spraying arm shell and the lower spraying arm shell are hinged to form a hollow spraying cavity, and the long folded edge of the upper spraying arm shell is buckled on the periphery of the short folded edge of the lower spraying arm shell;

4) pre-wrapping and bending the inner periphery of the part of the bottom ring with the long folded edge exceeding the short folded edge through a punch;

5) and completely folding the bent pre-wrapped edges by using the punch again to form the wrapped edges with longitudinal overlapped edges meshed.

10. The method for processing a spray arm for a dishwasher according to claim 9, wherein in step 4), the long flange is subjected to pre-hemming press bending by bending the long flange toward the inner periphery by using an inner inclination angle cavity of a lower die of the punch press; in the step 5), the pre-covered edges bent towards the inner periphery are further turned into covered edges by utilizing a deep groove die cavity of a lower die of the punch press; and the inner inclination angle die cavity and the deep groove die cavity are arranged in a vertically communicated manner.

Technical Field

The invention belongs to the technical field of dish washing machines, relates to a spray arm structure, and particularly relates to a spray arm for a dish washing machine and a processing method thereof.

Background

Most spray arms of the existing dish-washing machines are formed by plastics, and the spray arms are easy to deform after running for a period of time in the dish-washing machines, so that the rotation of the spray arms is influenced, and the failure of the spray arms is caused; the color of the spray arm changes greatly, such as yellowing, and the like, so that the appearance is influenced; secondly, plastic spray arms are not easy to clean. Therefore, the spray arm with the upper shell and the lower shell both made of stainless steel appears, but the existing stainless steel spray arm production process has the characteristic that a long folded edge extends out of the joint of the upper piece and the lower piece of the spray arm, and the appearance is greatly influenced due to the obvious two-piece structure, so that further improvement and perfection are needed.

For example, chinese patent No. CN210493996U discloses in 2020, 5.12.s a spray arm for a dish washer, which comprises a spray arm main body and a rotary shaft, wherein the spray arm main body comprises a spray arm upper piece and a spray arm lower piece which are assembled together, a spray cavity is formed between the spray arm upper piece and the spray arm lower piece, a central hole is formed in the spray arm lower piece, the rotary shaft has a through hole penetrating up and down, the rotary shaft is detachably connected with the central hole, the through hole is communicated with the spray cavity, the spray arm main body is made of metal, the rotary shaft is made of plastic, and is simple in structure and convenient to install. The edge folding feature of the spray arm for the dish washer is obvious, and the connection part is connected with the plane where the spray holes are located more abruptly, so that the appearance of the spray arm is not favorable.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a spraying arm for a dish washer and a processing method thereof, wherein the periphery of an upper shell of the spraying arm is coated on the periphery of a lower shell of the spraying arm through a multi-bending process to form a hidden edge covering with longitudinal overlapped edges for occlusion, so that the overall appearance of the spraying arm is improved to be concise and integrated.

The purpose of the invention can be realized by the following technical scheme: the utility model provides a dish washer is with spraying arm, includes joint, spray arm epitheca and spray arm inferior valve, the interface is opened at the center of spray arm epitheca, the joint by the interface upwards stretches out, the spray arm epitheca with the lock forms hollow spraying cavity about the spray arm inferior valve, the spray arm epitheca has the plane roof, the peripheral long hem of buckling downwards of plane roof, the spray arm inferior valve has recessed casing, the periphery of recessed casing has the plane border, the peripheral short hem of buckling downwards at plane border, the spray arm epitheca with under the lock state about the spray arm inferior valve, make the plane border with the laminating of plane roof wall mutually, long hem laminating in the periphery wall of short hem, long hem surpasss the hem portion of short hem inwards buckles to form bordures, the laminating of borduring the internal perisporium of short hem.

In the spray arm for the dish washer, the joint comprises a through barrel, an involute type flow guide port is fixedly connected to the bottom opening of the through barrel, the through barrel penetrates out of the interface of the spray arm upper shell from bottom to top, and the flow guide port is clamped and arranged in the spray cavity and tightly attached to the inner wall of the spray arm upper shell.

In foretell spray arm for dish washer, the spray arm epitheca with the spray arm inferior valve all is rectangular casing form, the water conservancy diversion mouth that connects is the rectangular sheet body, it is rectangular shape cavity to spray the chamber.

In the spray arm for the dish washer, the plane top wall of the upper shell of the spray arm is uniformly provided with a plurality of nozzles which are communicated with the spray cavity.

In the spray arm for the dish washer, the plane top wall of the upper shell of the spray arm is in transition connection with the long folded edge through the arc chamfer, and the bending angle range of the arc chamfer is 80-135 degrees; the long folded edge of the upper shell of the spray arm is in transition connection with the covered edge through an arc corner, and the bending angle of the arc corner is 360 degrees.

In the spray arm for the dish washer, the lower concave shell of the lower spray arm shell is in transition connection with the edge of the plane through the arc chamfer, and the bending angle of the arc chamfer is less than 90 degrees; the plane edge of the lower spray arm casing is in transition connection with the short folded edge through an arc chamfer, and the bending angle range of the arc chamfer is 80-135 degrees.

In the spraying arm for the dish washer, the length of the edge covering is smaller than that of the short folding edge.

In the spray arm for the dish washer, the spray arm upper shell and the spray arm lower shell are both stainless steel shells.

The processing method of the spraying arm for the dish-washing machine comprises the following steps:

1) respectively manufacturing and molding the upper spray arm shell and the lower spray arm shell;

2) pressing the joint into the interface of the upper shell of the spray arm through a hand press to form fixed connection;

3) the upper spraying arm shell and the lower spraying arm shell are hinged to form a hollow spraying cavity, and the long folded edge of the upper spraying arm shell is buckled on the periphery of the short folded edge of the lower spraying arm shell;

4) pre-wrapping and bending the inner periphery of the part of the bottom ring with the long folded edge exceeding the short folded edge through a punch;

5) and completely folding the bent pre-wrapped edges by using the punch again to form the wrapped edges with longitudinal overlapped edges meshed.

In the processing method of the spray arm for the dish washer, in the step 4), the long folded edge is subjected to pre-covered edge bending of bending towards the inner periphery by using the inner inclination angle die cavity of the lower die of the punch press; in the step 5), the pre-covered edges bent towards the inner periphery are further turned into covered edges by utilizing a deep groove die cavity of a lower die of the punch press; and the inner inclination angle die cavity and the deep groove die cavity are arranged in a vertically communicated manner.

Compared with the prior art, the spray arm for the dish-washing machine and the processing method thereof have the following advantages:

the novel spraying arm structure has the advantages that the transverse overlapping occlusion is changed, the longitudinal overlapping occlusion is improved, the inner side hidden structure is formed by the edge covering, the wrinkling problem of the edge covering is eliminated, the edge covering characteristics cannot be seen from the top surface and the side surface of the whole spraying arm, the overall appearance line is smooth, the simplicity and the attractiveness are enhanced, and the phenomenon that stains are reserved at dead corners due to long-time use is avoided.

Drawings

Fig. 1 is an overall assembly view of the spray arm for the dishwasher.

Fig. 2 is an overall exploded view of the spray arm for the dishwasher.

Fig. 3 is an internal cross-sectional view of a spray arm for a dishwasher.

FIG. 4 is a block diagram of step 1 of the process for manufacturing a spray arm for a dishwasher.

FIG. 5 is a block diagram of step 2 of the process for manufacturing a spray arm for a dishwasher.

FIG. 6 is a block diagram of step 3 of the process for manufacturing a spray arm for a dishwasher.

Fig. 7 is a block diagram of the process of manufacturing the spray arm for the dishwasher in step 4.

FIG. 8 is a view showing the structure of step 5 of the process for manufacturing a spray arm for a dishwasher.

In the figure, 1, a spray arm upper shell; 1a, folding long edges; 1b, edge covering; 2. a joint; 3. a spray arm lower shell; 3a and short folded edges.

Detailed Description

The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.

As shown in fig. 1 to 3, the spray arm for the dish washer comprises a joint 2, a spray arm upper shell 1 and a spray arm lower shell 3, wherein the center of the spray arm upper shell 1 is provided with an interface, the joint 2 extends upwards from the interface, the spray arm upper shell 1 and the spray arm lower shell 3 are buckled up and down to form a hollow spray cavity, the spray arm upper shell 1 is provided with a plane top wall, a long folded edge 1a is bent downwards at the periphery of the plane top wall, the spray arm lower shell 3 is provided with a concave shell, a plane edge is arranged at the periphery of the concave shell, a short folded edge 3a is bent downwards at the periphery of the plane edge, the plane edge is jointed with the plane top wall under the vertical buckling state of the spray arm upper shell 1 and the spray arm lower shell 3, the long folded edge 1a is jointed with the peripheral wall of the short folded edge 3a, the bottom ring part of the long folded edge 1a, which exceeds the short folded edge 3a, is bent inwards to form a folded edge 1b, and the folded edge 1b is jointed with the inner peripheral wall of the short folded edge 3 a.

In the spray arm for the dish-washing machine, the long folding edge 1a is longer than the short folding edge 3a by about 14 mm. The long folded edge 1a exceeds the bottom ring part of the short folded edge 3a and is inwards bent to form an edge covering 1b, and then the edge covering 1b is hidden at the inner side of the lower spray arm shell 3, and the characteristics of the edge covering 1b cannot be observed in the plane direction of the nozzle and the side face of the whole spray arm, so that the whole appearance of the spray arm has better integrity.

The joint 2 comprises a middle through barrel, an involute type flow guide opening is fixedly connected to the bottom opening of the middle through barrel, and the middle through barrel penetrates out of the connector of the spray arm upper shell 1 from bottom to top, so that the flow guide opening is clamped in the spray cavity and clings to the inner wall of the spray arm upper shell 1. The water conservancy diversion mouth is outwards buckled 90 settings at joint 2 tip, and the back-off is established to the periphery wall epirelief that connects 2 and is followed, and the interface of spray arm epitheca 1 is located and forms spacing joint between water conservancy diversion mouth and the back-off edge.

Spray arm epitheca 1 and spray arm inferior valve 3 all are rectangular casing form, and the water conservancy diversion mouth that connects 2 is rectangular lamellar body, sprays the chamber and is rectangular shape cavity. The diversion port comprises a plate body with a rectangular outer contour, the center of the plate body is communicated with the passage port of the connector 2, and the first diversion plate and the second diversion plate on the diversion port are both positioned on the periphery of the passage port.

A plurality of nozzles are uniformly formed in the plane top wall of the spray arm upper shell 1 and communicated with the spray cavity.

The plane top wall of the spray arm upper shell 1 is in transition connection with the long folded edge 1a through an arc chamfer, and the bending angle range of the arc chamfer is 80-135 degrees; the long folded edge 1a and the covered edge 1b of the spray arm upper shell 1 are in transition connection through an arc corner, and the bending angle of the arc corner is 360 degrees.

The lower concave shell of the spray arm lower shell 3 is in transition connection with the edge of the plane through an arc chamfer, and the bending angle of the arc chamfer is smaller than 90 degrees; the plane edge of the spray arm lower shell 3 is in transition connection with the short folded edge 3a through an arc chamfer, and the bending angle range of the arc chamfer is 80-135 degrees.

The length of the hem 1b is shorter than the length of the short flap 3 a.

The spray arm upper shell 1 and the spray arm lower shell 3 are both stainless steel shells.

The processing method of the spraying arm for the dish-washing machine comprises the following steps:

as shown in fig. 4, 1), respectively manufacturing and molding the spray arm upper shell 1 and the spray arm lower shell 3;

as shown in fig. 5, 2), pressing the joint 2 into the interface of the spray arm upper shell 1 by a hand press to form fixed connection;

as shown in fig. 6, 3), the upper and lower pieces of the spray arm upper shell 1 and the spray arm lower shell 3 are hinged, so that the spray arm upper shell 1 and the spray arm lower shell 3 form a hollow spraying cavity, and the long folding edge 1a of the spray arm upper shell 1 is buckled on the periphery of the short folding edge 3a of the spray arm lower shell 3;

as shown in fig. 7, 4), pre-hemming and press-bending the inner circumference of the base ring part of the long folding edge 1a beyond the short folding edge 3a by a punch;

in the step 4), the long folded edge 1a is subjected to pre-covered edge bending by bending towards the inner periphery by using an inner inclination angle die cavity of a lower die of the punch press;

as shown in fig. 8, 5), the press-bent pre-wrapped edge 1b is completely folded back again by the press to form a wrapped edge 1b with longitudinal overlapping engagement.

In the step 5), the pre-covered edge 1b bent towards the inner periphery is further turned into a covered edge 1b by utilizing a deep groove die cavity of a lower die of the punch press; the inner inclination angle die cavity and the deep groove die cavity are arranged in a vertical communication mode.

Compared with the prior art, the spray arm for the dish-washing machine and the processing method thereof have the following advantages:

the original technology is changed into transverse overlap occlusion, the improvement is longitudinal overlap occlusion, so that the edge covering 1b forms an inner side hidden structure, the wrinkling problem of the edge covering 1b is eliminated, the characteristics of the edge covering 1b cannot be seen from the top surface and the side surface of the integral spray arm, the integral appearance line is smooth, the simplicity and the attractiveness are enhanced, and the phenomenon that stains are left at dead corners due to long-time use is avoided.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.

Although the spray arm upper housing 1 is used more herein; a long folded edge 1 a; wrapping edges 1 b; a joint 2; a spray arm lower shell 3; short flap 3a, etc., but does not exclude the possibility of using other terms. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.