CN217310214U - Rotary connection structure and foldable dish rack with same - Google Patents

Abstract

The utility model discloses a swivelling joint structure and have its collapsible bowl dish frame, swivelling joint structure include first lid and second lid, two pivot rotatable coupling of two first braced frames of collapsible bowl dish frame and first lid, two pivot rotatable coupling of two second braced frames and second lid. When the foldable dish rack is not used, the two first supporting frames and the two second supporting frames can be folded by rotating the two first supporting frames and the two second supporting frames, so that the storage function is realized, the occupied space is small, and the folding operation is simple and convenient; when this collapsible bowl dish shelf is the user state, expand or open two braced frame, two spacing faces of first location arch are used for restricting first braced frame and continue to rotate, and two spacing faces of second location arch are used for restricting second braced frame and continue to rotate to play the positioning action, make first braced frame and second braced frame cross arrangement, play and put tableware and waterlogging caused by excessive rainfall effect, structural design is simple reasonable.

Description

Rotary connection structure and foldable dish rack with same

Technical Field

The utility model relates to a kitchen articles for daily use technical field especially relates to a swivelling joint structure and have its collapsible bowl dish frame.

Background

The surfaces of kitchen utensils such as bowls and dishes still have a large amount of water drops after being cleaned, and if the kitchen utensils are directly kept flat for a long time, bacteria are easy to breed, so that the kitchen utensils are unsanitary, and can occupy a plurality of places when being placed at will, so that inconvenience is brought to the daily life of a user. Therefore, dish racks specially used for holding dishes such as kitchen dishes are produced in the market, and have now become one of the indispensable utensils in the kitchen.

Although the dish rack can significantly improve the convenience of daily life in the kitchen, the following technical defects and shortcomings are still generally existed at present: firstly, the traditional dish rack products are of various types, but basically have an integral net rack type structure, and cannot be folded, stored and stored when not used, so that the occupied space is large; even if part dish rack product can realize folding function, often because structural design is too complicated to result in accomodating complex operation, and take place structural damage easily in frequent folding process, the practicality is low, is difficult to satisfy user's daily user demand.

Therefore, there is a need in the art to provide a dish rack which is convenient for realizing the folding and storage functions, has a simple and reasonable structural design, and has high structural reliability.

SUMMERY OF THE UTILITY MODEL

In order to overcome above-mentioned prior art at least one defect, the utility model provides a swivelling joint structure and have its collapsible bowl dish frame, this swivelling joint structure and have its collapsible bowl dish frame have that structural design is simple reasonable, structural reliability is high and be convenient for realize folding the characteristics of accomodating the function.

The utility model discloses a solve the technical scheme that its problem adopted and be:

a swivel connection structure, comprising:

the first end surface of the first cover body is provided with a first rotating shaft, a second rotating shaft and a first positioning bulge, and one side of the first positioning bulge, which faces the first rotating shaft and the second rotating shaft, is respectively provided with a first limiting surface and a second limiting surface;

a first end surface of the first cover body is provided with a first rotating shaft, a first rotating shaft and a first positioning bulge, and one side of the first positioning bulge facing the first rotating shaft is provided with a first limiting surface and a first limiting surface;

the first cover body is fixedly connected with the second cover body, the first end face of the first cover body is opposite to the first end face of the second cover body, and the first rotating shaft and the second rotating shaft are respectively opposite to the third rotating shaft and the fourth rotating shaft.

Further, the first rotating shaft and the second rotating shaft are symmetrically arranged on two sides of a center line of the first cover body, wherein the center line extends in the vertical direction;

the third rotating shaft and the fourth rotating shaft are symmetrically arranged on two sides of a center line of the second cover body, and the center line extends in the vertical direction.

Furthermore, the first limiting surface and the second limiting surface are obliquely arranged relative to a center line of the first cover body extending along the vertical direction, and the third limiting surface and the fourth limiting surface are obliquely arranged relative to a center line of the second cover body extending along the vertical direction;

the first limiting surface and the second limiting surface are symmetrically arranged on two sides of a center line of the first cover body extending in the vertical direction, and the third limiting surface and the fourth limiting surface are symmetrically arranged on two sides of a center line of the second cover body extending in the vertical direction.

Furthermore, a first division bar is further arranged on the first end face of the first cover body, and the first division bar is arranged in the vertical direction and is arranged in the middle of the first rotating shaft and the second rotating shaft;

the first end face of the second cover body is further provided with a second division bar, and the second division bar is arranged in the middle of the third rotating shaft and the fourth rotating shaft along the vertical direction.

Furthermore, the first end face of the first cover body is also provided with an assembling portion, the first end face of the second cover body is provided with an assembling hole, and an external connecting piece penetrates through the assembling hole and is inserted into the assembling portion so as to fixedly connect the first cover body and the second cover body together.

Further, the assembly portion is a nut, the assembly hole is a screw hole, and the external connecting piece is any one of a screw, a screw or a bolt.

Based on the same design concept, the utility model also provides a foldable dish rack comprising the rotary connection structure, which further comprises a first support frame and a second support frame, the end parts of the two first support frames are respectively rotatably connected with the first rotating shaft and the second rotating shaft, and the two second support frames are respectively rotatably connected with the third rotating shaft and the fourth rotating shaft;

wherein the second support frame is disposed on top of the first support frame.

Further, the foldable dish rack further comprises a gasket, wherein the gasket is sleeved on the third rotating shaft and the fourth rotating shaft, is arranged between the first supporting frame and the second supporting frame and is used for separating the first supporting frame from the second supporting frame.

Furthermore, the foldable dish rack also comprises a water receiving tray, wherein a plurality of limiting bulges which extend upwards are arranged on the periphery of the top of the water receiving tray and used for limiting and blocking the movement of the first supporting frame.

Further, the foldable dish rack further comprises a cylinder structure detachably mounted on the second support frame;

and a grid structure formed by combining a plurality of strip structures arranged at intervals is arranged on the second supporting frame.

To sum up, the utility model provides a swivelling joint structure and collapsible bowl dish frame that has this swivelling joint structure compare in prior art, have following technological effect at least:

1) the utility model provides a rotary connection structure, which comprises a first cover body and a second cover body, wherein a first rotating shaft and a second rotating shaft on the first cover body are used for being rotatably connected with the end parts of two first supporting frames, a third rotating shaft and a fourth rotating shaft on the second cover body are used for being rotatably connected with the end parts of two second supporting frames, and the first supporting frame and the second supporting frame can be connected together after the first cover body and the second cover body are fixedly connected and combined together; therefore, when the foldable dish rack is not used, the two first supporting frames and the two second supporting frames can be folded by rotating the two first supporting frames and the two second supporting frames, the storage function is realized, the occupied space is small, and the folding operation is simple and convenient;

2) the utility model provides a rotary connecting structure, the first cover body of which also comprises a first positioning bulge, and the second cover body also comprises a second positioning bulge, when the foldable dish rack is in use state, the two first supporting frames and the two second supporting frames can be unfolded or opened by respectively rotating the two first supporting frames and the two second supporting frames; the first positioning bulge is provided with a first limiting surface and a second limiting surface and is used for abutting against the first supporting frame after the first supporting frame rotates for a certain angle to limit the first supporting frame to continuously rotate, so that the positioning effect is achieved; the second positioning bulge is provided with a third limiting surface and a fourth limiting surface and is used for abutting against the second supporting frame after the second supporting frame rotates for a certain angle to limit the second supporting frame to continuously rotate, so that the positioning effect is achieved; the first braced frame that finally makes this collapsible bowl dish frame expandes and is used for supporting the tableware that second braced frame and top were put, and second braced frame expandes and is used for putting the tableware and play the waterlogging caused by excessive rainfall effect, and structural design is simple reasonable, even through folding also difficult emergence structural damage through frequent upset, and structural stability is good.

Drawings

Fig. 1 is a schematic structural view of a first cover body of the present invention;

fig. 2 is a schematic structural view of a second cover body of the present invention;

fig. 3 is a schematic structural view of the first cover and the first support frame of the present invention;

FIG. 4 is an enlarged partial schematic view H of FIG. 3;

fig. 5 is a schematic structural view of a second cover and a second support frame according to the present invention;

FIG. 6 is a partial schematic enlarged view K of FIG. 5;

fig. 7 is a schematic structural view of the foldable dish rack of the present invention in an unfolded state;

FIG. 8 is a schematic structural view of the foldable dish rack of the present invention in a folded state;

wherein the reference numerals have the following meanings:

1. a first cover body; 11. a first rotating shaft; 12. a second rotating shaft; 13. a first positioning projection; 131. a first limiting surface; 132. a second limiting surface; 14. an assembling portion; 15. a first division bar; 2. a second cover body; 21. a third rotating shaft; 22. a fourth rotating shaft; 23. a second positioning projection; 231. a third limiting surface; 232. A fourth limiting surface; 24. an assembly hole; 25. a second division bar; 3. a first support frame; 4. a second support frame; 41. a grid structure; 5. a gasket; 6. a water pan; 61. a limiting bulge; 7. a cylinder structure.

Detailed Description

For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1, fig. 3 and fig. 4, according to the embodiment of the present invention, this rotary connection structure includes a first cover body 1, a first end surface of the first cover body 1 is provided with a first rotating shaft 11, a second rotating shaft 12 and a first positioning protrusion 13, and the first positioning protrusion 13 faces the first rotating shaft 11, one side of the second rotating shaft 12 is provided with a first limiting surface 131 and a second limiting surface 132 respectively. Wherein, the first rotating shaft 11 and the second rotating shaft 12 of the first cover 1 are respectively used for rotatably connecting with the ends of the two first supporting frames 3 of the foldable dish rack, when the foldable dish rack is not used, the two first supporting frames 3 can be rotated oppositely to be folded together.

Referring to fig. 2, 5 and 6, the rotary connection structure further includes a second cover 2, a third rotating shaft 21, a fourth rotating shaft 22 and a second positioning protrusion 23 are disposed on a first end surface of the second cover 2, and a third limiting surface 231 and a fourth limiting surface 232 are disposed on one side of the second positioning protrusion 23 facing the third rotating shaft 21 and the fourth rotating shaft 22, respectively. Wherein, the third rotating shaft 12 and the fourth rotating shaft 12 of the second cover 2 are respectively used for being rotatably connected with the end parts of the two second supporting frames 4 of the foldable dish rack, when the foldable dish rack is not used, the two second supporting frames 4 can be rotated oppositely to be folded together.

In the technical solution of this embodiment, the first cover 1 and the second cover 2 are fixedly connected, a first end surface of the first cover 1 and a first end surface of the second cover 2 are disposed opposite to each other, and the first rotating shaft 11 and the second rotating shaft 12 are disposed opposite to the third rotating shaft 21 and the fourth rotating shaft 22, respectively. Specifically, the first cover 1 and the second cover 2 are fixedly connected to each other, so that when they are combined together, they can be used as an intermediate connection structure to connect the first support frame 3 and the second support frame 4 together in a foldable manner, and the following technical effects are achieved:

firstly, when the foldable dish rack is not used, the two first supporting frames 3 and the two second supporting frames 4 can be folded together by rotating the two first supporting frames and the two second supporting frames in opposite directions, so that the storage function is realized, the occupied space is small, and the folding operation is simple and convenient;

when the foldable dish rack needs to be used, the two first supporting frames 3 can be unfolded or unfolded by reversely rotating the two first supporting frames, and because the first positioning bulges 13 are provided with the first limiting surfaces 131 and the second limiting surfaces 132, the two first supporting frames 3 are abutted against the two limiting surfaces after rotating for a certain angle, so that the continuous rotation of the two first supporting frames is limited, and the positioning effect is realized; similarly, the two second support frames 4 can be unfolded or opened by rotating the two second support frames in opposite directions, and the first positioning protrusion 13 is provided with the first limiting surface 131 and the second limiting surface 132, so that the two second support frames 4 are limited to continue rotating after rotating for a certain angle and are abutted against the two limiting surfaces, and a positioning effect is achieved; first braced frame 3 and second braced frame 4 all turn over the back of rolling over and expanding, and this collapsible bowl dish frame's first braced frame 3 can be used for supporting second braced frame 4 and the tableware that its top was put, and second braced frame 4 can be used for putting the tableware and play the waterlogging caused by excessive rainfall effect to the tableware, and structural design is simple reasonable, even through frequently overturn folding also difficult emergence structural damage, and structural stability is good.

In a preferred embodiment of the present invention, referring to fig. 1, the first rotating shaft 11 and the second rotating shaft 12 are symmetrically disposed on both sides of a center line a of the first cover 1 extending in the vertical direction. Particularly, through this structural design mode, can ensure under the condition that the both ends length of first supporting frame 3 equals, but two first supporting frame 3 bilateral symmetry set up when the upset is expanded, improve the stability of first supporting frame 3 when supporting second supporting frame 4 and the tableware that its top was put. Similarly, referring to fig. 2, the third rotating shaft 21 and the fourth rotating shaft 22 are symmetrically disposed on two sides of a center line b of the second cover 2 extending in the vertical direction. Particularly, through this structural design mode, can ensure under the condition that the both ends length of second braced frame 4 equals, but two second braced frames 4 bilateral symmetry set up when the upset is expanded, improve the stability of second braced frame 4 when supporting the tableware of putting.

Referring to fig. 1, in a further technical solution of this embodiment, the first limiting surface 131 and the second limiting surface 132 are disposed obliquely with respect to a center line a of the first cover 1 extending in the vertical direction, so as to ensure that the two first supporting frames 3 are disposed crosswise at a certain angle when being turned over and unfolded, and achieve a supporting effect of the first supporting frames 3 on the second supporting frame 4 and the dishware placed on top of the second supporting frame 4. Similarly, referring to fig. 2, the third limiting surface 231 and the fourth limiting surface 232 are disposed obliquely relative to the central line b of the second cover 2 extending along the vertical direction, so as to ensure that the two second supporting frames 4 are disposed at a certain angle when being turned over and unfolded, and to realize the supporting effect of the second supporting frames 4 on the tableware placed thereon.

As shown in fig. 1, the first limiting surface 131 and the second limiting surface 132 are symmetrically disposed on two sides of a center line a of the first cover 1 extending in the vertical direction, so that the two first supporting frames 3 can be symmetrically disposed in the left-right direction when being turned over and unfolded, and the stability of the first supporting frames 3 when supporting the second supporting frames 4 and the dishes placed on the tops thereof is improved. Similarly, referring to fig. 2, the third limiting surface 231 and the fourth limiting surface 232 are symmetrically disposed at two sides of the central line b of the second cover 2 extending along the vertical direction, so as to ensure that the two second supporting frames 4 can also be symmetrically disposed at left and right sides when being turned over and unfolded, thereby improving the stability of the second supporting frames 4 when supporting the placed tableware.

Referring to fig. 1, in a further technical solution of this embodiment, a first division bar 15 is further disposed on a first end surface of the first cover body 1, and the first division bar 15 is disposed in a vertical direction and is disposed in a middle portion of the first rotating shaft 11 and the second rotating shaft 12. Particularly, first parting bead 15 also sets up along the central line a direction that the vertical direction of first lid 1 extends, sets up it at the middle part of first pivot 11 and second pivot 12, can be under the prerequisite that first pivot 11 and second pivot 12 symmetry set up, and two first supporting frame 3 can not lead to structural damage because of colliding each other when the folding opening and shutting of upset, improve this collapsible dish rack's structural strength.

Similarly, referring to fig. 2, a second division bar 25 is further disposed on the first end surface of the second cover 2, and the second division bar 25 is disposed along the vertical direction and is disposed in the middle of the third rotating shaft 21 and the fourth rotating shaft 22. Specifically, the second division bar 25 is also disposed along the direction of the central line b extending in the vertical direction of the second cover 2, and is disposed in the middle of the third rotating shaft 21 and the fourth rotating shaft 22, so that on the premise that the third rotating shaft 21 and the fourth rotating shaft 22 are symmetrically disposed, the two second supporting frames 4 will not be damaged due to mutual collision when being opened and closed in a turning and folding manner, and the structural strength of the foldable dish rack is further improved.

Referring to fig. 1, 2, 4 and 6, in another embodiment of the present invention, the first end surface of the first cover body 1 is further provided with an assembling portion 14, the first end surface of the second cover body 2 is provided with an assembling hole 24, and an external connecting member is inserted into the assembling portion 14 through the assembling hole 24 to fixedly connect the first cover body 1 and the second cover body 2 together. In the technical solution of this embodiment, the assembling portion 14 is a protruding structure with a groove and embedded in the first cover 1, the external connecting member passes through the assembling hole 24, and the end portion of the external connecting member is inserted into the groove of the assembling portion 14, so that the first cover 1 and the second cover 2 can be fixedly connected together, the first cover 1 and the second cover 2 are assembled, and the first supporting frame 3 and the second supporting frame 4 can be connected in a folding manner.

In a preferred embodiment of the present invention, the mounting portion 14 is a nut, the mounting hole 24 is a screw hole, and the external connection member is any one of a screw, a bolt, and a bolt. Specifically, after any external connecting member of a screw, or a bolt is passed through the screw hole and screwed into the nut, the first cover body 1 and the second cover body 2 can be combined together. More specifically, the nut and the first cover 1 may be a unitary structure.

Referring specifically to fig. 7, based on the same design, the present invention further provides an embodiment of a foldable dish rack, which includes the rotary connection structure of the above embodiment.

Referring to fig. 3 to 6, in the solution of this embodiment, the foldable dish rack further includes a first support frame 3 and a second support frame 4, ends of the first support frame 3 are respectively rotatably connected to the first rotating shaft 11 and the second rotating shaft 12, and the second support frame 4 is respectively rotatably connected to the third rotating shaft 21 and the fourth rotating shaft 22. Wherein, when the foldable dish rack is not used, the two first supporting frames 3 can be rotated in opposite directions, and the two second supporting frames 4 can be rotated in opposite directions, so that the two first supporting frames and the two second supporting frames are folded together; when the foldable dish rack is used, the two first supporting frames 3 and the two second supporting frames 4 are unfolded or opened by reversely rotating the two first supporting frames and the two second supporting frames to form a frame structure which is arranged in a crossed manner and used for placing tableware and playing a draining effect. More specifically, the first support frame 3 and the second support frame 4 are made of aluminum, and have high structural strength and stable structural performance.

Referring to fig. 7, the second support frame 4 is disposed on top of the first support frame 3. The second supporting frame 4 is used for vertically placing dishes or obliquely placing other tableware and has a draining effect; the first support frame 3 is used to support the second support frame 4, thereby indirectly supporting the dishes on the second support frame 4.

Referring to fig. 4 and 6, in a preferred embodiment of the present embodiment, the foldable dish rack further comprises a gasket 5, wherein the gasket 5 is sleeved on the third rotating shaft 21 and the fourth rotating shaft 22 and is disposed between the first supporting frame 3 and the second supporting frame 4 for separating the first supporting frame 3 and the second supporting frame 4. In the preferred embodiment, the first and second support frames 3 and 4 are separated by providing a circular gasket 5 between them, thereby preventing the first and second support frames 3 and 4 from rubbing against each other when the foldable dish rack is turned and folded to open and close, thereby causing structural wear or damage, and improving the lifespan of the foldable dish rack.

Referring to fig. 7 and 8, in another preferred embodiment of the present invention, the foldable dish rack further comprises a water-receiving tray 6, and the top peripheral side of the water-receiving tray 6 is provided with a plurality of limiting protrusions 61 formed by extending upwards for limiting and blocking the movement of the first support frame 3. In the preferred embodiment, the water receiving tray 6 is used for receiving and collecting water drained by the dishware placed on the second supporting frame 4, and can also play a role of flatly placing the dishware. More specifically, the first support frames 3 are prevented from sliding out from both sides of the water collector 6 when the foldable dish rack is unfolded by providing the position limiting protrusions 61 at the top circumference side of the water collector 6.

In another preferred version of this embodiment, shown in fig. 7, the collapsible dish rack further comprises a cylinder structure 7, said cylinder structure 7 being detachably mounted on said second support frame 4. In this preferred technical scheme, tube structure 7 is that the top is equipped with open-ended container mechanism for putting tableware such as knife and fork, and play waterlogging caused by excessive rainfall effect.

When the foldable dish rack is in the folded state, the cylinder structure 7 is detached from the second support frame 4 and placed on top of the water tray 6, as shown in fig. 8.

As shown in fig. 5, a grid structure 41 formed by combining a plurality of strip structures arranged at intervals is provided on the second support frame 4. Wherein, referring to fig. 7, when the foldable dish rack is in an unfolded use state, the gaps between the rack structures 41 can be used for vertically placing dishes or other tableware with handles, and the whole rack structure 41 can be used for obliquely placing the tableware.

Referring to fig. 8, when the foldable dish rack is in a folded state, the grid structure 41 of the second support frame 4 can be used to lay down dishes and perform a draining function.

To sum up, the utility model provides a first pivot 11 on the first lid 1, second pivot 12 be used for with the tip rotatable coupling of two first braced frames 3 of this collapsible dish rack, third pivot 21 on the second lid 2, fourth pivot 22 be used for with the tip rotatable coupling of two second braced frames 4 of this collapsible dish rack, with first lid 1 and second lid 2 combination back together, can link together first braced frame 3 and second braced frame 4. Therefore, when the foldable dish rack is not used, the two first supporting frames 3 and the two second supporting frames 4 can be folded by rotating the two first supporting frames, the storage function is achieved, the occupied space is small, and the folding operation is simple and convenient.

Furthermore, the utility model provides a first lid 1 still includes first location arch 13, and second lid 2 still includes second location arch 23, when this collapsible dish rack is in the user state, rotates two first braced frames 3 and two second braced frames 4 respectively and can expand the two or open. Moreover, the first positioning protrusion 13 is provided with a first limiting surface 131 and a second limiting surface 132, which are used for abutting against the first supporting frame 1 after the first supporting frame rotates for a certain angle, so as to limit the first supporting frame to continue rotating, thereby playing a positioning role; the second positioning protrusion 23 is provided with a third limiting surface 231 and a fourth limiting surface 232, and is used for abutting against the second supporting frame 4 after the second supporting frame rotates for a certain angle, so as to limit the second supporting frame to continue rotating, and thus, a positioning effect is achieved; the first braced frame 3 that finally makes this collapsible bowl dish frame expandes and is used for supporting second braced frame 4 and the tableware that the top was put, and second braced frame 4 expandes and is used for putting the tableware and play the waterlogging caused by excessive rainfall effect, and structural design is simple reasonable, even through frequently overturn foldingly also difficult emergence structural damage, structural stability is good and structural strength is high.

The technical means disclosed by the scheme of the present invention is not limited to the technical means disclosed by the above embodiments, but also includes the technical scheme formed by combining the above technical features at will. It should be noted that modifications and embellishments may be made by those skilled in the art without departing from the principles of the present invention and are considered within the scope of the invention.

Claims (10)

1. A rotary joint structure, comprising:

the first end face of the first cover body is provided with a first rotating shaft, a second rotating shaft and a first positioning bulge, and one side of the first positioning bulge, which faces the first rotating shaft and the second rotating shaft, is respectively provided with a first limiting face and a second limiting face;

a first end surface of the first cover body is provided with a first rotating shaft, a first rotating shaft and a first positioning bulge, and one side of the first positioning bulge facing the first rotating shaft is provided with a first limiting surface and a first limiting surface;

the first cover body is fixedly connected with the second cover body, the first end face of the first cover body is opposite to the first end face of the second cover body, and the first rotating shaft and the second rotating shaft are respectively opposite to the third rotating shaft and the fourth rotating shaft.

2. The rotary connection structure according to claim 1, wherein the first rotation shaft and the second rotation shaft are symmetrically disposed on both sides of a center line of the first cover body extending in a vertical direction;

the third rotating shaft and the fourth rotating shaft are symmetrically arranged on two sides of a center line of the second cover body, wherein the center line extends in the vertical direction.

3. The rotary connection structure according to claim 2, wherein the first stopper surface and the second stopper surface are provided obliquely with respect to a center line of the first cover body extending in the vertical direction, and the third stopper surface and the fourth stopper surface are provided obliquely with respect to a center line of the second cover body extending in the vertical direction;

the first limiting surface and the second limiting surface are symmetrically arranged on two sides of a center line of the first cover body, which extends in the vertical direction, and the third limiting surface and the fourth limiting surface are symmetrically arranged on two sides of a center line of the second cover body, which extends in the vertical direction.

4. The rotating connection structure according to claim 3, wherein a first division bar is further disposed on the first end surface of the first cover body, and the first division bar is disposed in a vertical direction and is disposed in the middle of the first rotating shaft and the second rotating shaft;

the first end face of the second cover body is further provided with a second division bar, and the second division bar is arranged in the middle of the third rotating shaft and the fourth rotating shaft along the vertical direction.

5. The rotating connecting structure according to claim 1, wherein the first end surface of the first cover is further provided with a fitting portion, the first end surface of the second cover is provided with a fitting hole, and an external connecting member is inserted through the fitting hole and into the fitting portion to fixedly connect the first cover and the second cover together.

6. The rotary connection structure according to claim 5, wherein the fitting portion is a nut, the fitting hole is a screw hole, and the external connection member is any one of a screw, or a bolt.

7. A foldable dish rack comprising the rotary coupling structure according to any one of claims 1 to 6, further comprising first and second support frames, both ends of the first support frames being rotatably coupled to the first and second rotary shafts, respectively, and both the second support frames being rotatably coupled to the third and fourth rotary shafts, respectively;

wherein the second support frame is disposed on top of the first support frame.

8. The foldable dish rack according to claim 7, further comprising a gasket fitted around the third and fourth rotating shafts and disposed between the first and second support frames for separating the first and second support frames.

9. The foldable dish rack according to claim 7, further comprising a water receiving tray, wherein a plurality of upwardly extending limiting protrusions are formed on the periphery of the top of the water receiving tray for limiting and blocking the movement of the first support frame.

10. The foldable dish rack according to claim 7, further comprising a cylinder structure detachably mounted on the second support frame;

and a grid structure formed by combining a plurality of strip structures arranged at intervals is arranged on the second supporting frame.

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