CN221823605U - Automatic door closing hinge for refrigerator and vertical refrigerator - Google Patents

Abstract

The utility model relates to an automatic door closing hinge for a refrigerator and a vertical refrigerator, and belongs to the technical field of refrigerators. The automatic door closing hinge comprises a box body, a rotating piece and a hydraulic damper; the box body is arranged on the refrigerator box body; the rotating piece comprises a driving part and a connecting part; the connecting part is rotationally connected to the box body so that the rotating piece rotates relative to the box body, penetrates out of the box body and is connected with the rotating shaft of the door body; the peripheral surface of one side of the driving part is a driving surface, and the driving surface comprises a convex surface and a concave surface; the hydraulic damper is arranged in the box body and longitudinally stretches along the box body, and the stretching end of the hydraulic damper is always contacted with the convex surface; when the door body is opened to a maximum angle, the telescopic end is contacted with one side of the convex surface far away from the concave surface, and the telescopic end is in a retracted state; in the closing process of the door body, the telescopic end stretches out and slides along the convex surface towards the direction approaching to the concave surface; when the door body is closed, the telescopic end is contacted with one side of the convex surface, which is close to the concave surface, and the telescopic end is in an extending state and is accommodated in the concave surface. The automatic door closing hinge belt has the door closing damping effect, slow door closing force, stable structure and long service life.

Description

Automatic door closing hinge for refrigerator and vertical refrigerator

Technical Field

The utility model belongs to the technical field of refrigerators, and in particular relates to an automatic door closing hinge for refrigerators and a vertical refrigerator.

Background Art

Vertical glass door freezer display cabinets have the advantages of small footprint, layered display, and good display effect, and are widely used in supermarkets. In order to better display goods and reduce the obstruction of goods, the glass door frames of vertical glass door freezer display cabinets are getting narrower and narrower, and even directly use frameless glass doors (that is, the left and right frames of the glass door are eliminated). However, the existing automatic door closing structure is usually unable to be installed inside the door frame due to its large size, and can only be installed at the door hinge.

At present, there are mainly two structures of automatic door closing hinges commonly used in vertical glass door frozen display cabinets. One structure relies on a torsion spring to obtain a torsion force to close the door, and the other structure relies on a compression spring to obtain a compression force converted into a torsion force to close the door. However, both of the above-mentioned two existing automatic door closing hinges rely on springs to convert torsion force, which requires high spring strength. After long-term use, the spring is prone to breakage. Moreover, the closing force of the above-mentioned two existing automatic door closing hinges is uncontrollable. The larger the door opening angle, the more severe the spring compression or distortion, and the greater the door closing force. Therefore, after the customer opens the door at a large angle for shopping, if he suddenly lets go, it is very easy for the door body to close quickly and hit the box body, which will cause a loud noise and affect the customer experience.

Therefore, how to provide an automatic door closing hinge for a refrigerator with a long service life and capable of slowly closing the door is a technical problem that urgently needs to be solved.

Utility Model Content

In view of the above technical problems, the utility model provides an automatic door closing hinge for a refrigerator and a vertical refrigerator. The automatic door closing hinge has a door closing damping effect, the door closing force is slow, and the structure is stable and the service life is long.

The utility model provides an automatic door closing hinge for a refrigerator, comprising:

A box body, which is installed in the box body of the refrigerator;

The rotating member is located at one longitudinal end of the box body, and the rotating member includes a driving part and a connecting part connected to the vertical end of the driving part; the connecting part is rotatably connected to the box body so that the rotating member rotates relative to the box body with the vertical line as the rotation axis, and the connecting part passes through the box body and is connected to the rotating shaft of the door body to drive the door body and the rotating member to rotate synchronously; the outer peripheral surface of one side of the driving part is a driving surface, and the driving surface includes a convex surface and a concave surface arranged alternately;

Hydraulic damper, the hydraulic damper is installed in the box body and extends and retracts along the longitudinal direction of the box body, and its telescopic end is always in contact with the convex surface of the driving surface; when the door body is opened to the maximum angle, the rotating part rotates until the convex surface faces the telescopic end, the telescopic end contacts the side of the convex surface away from the concave surface, and the telescopic end is in a retracted state; during the closing process of the door body, the rotating part rotates with the door body, the telescopic end extends and slides along the direction from the convex surface to the concave surface; when the door body is closed, the rotating part rotates until the concave surface faces the telescopic end, the telescopic end contacts the side of the convex surface close to the concave surface, and the telescopic end is in an extended state and accommodated in the concave surface.

In some of the embodiments, when the door body is opened to a maximum angle, the line of action of the force applied by the telescopic end to the convex surface passes through the rotation axis of the rotating member.

In some embodiments, the driving surface includes two convex surfaces and one concave surface, the concave surface is connected between the two convex surfaces, and the concave surface and the convex surface have a smooth transition, the convex surface is a convex arc surface, and the concave surface is a concave arc surface, so that the cross-section of the driving part is cashew-shaped; when the door body is opened to the maximum angle, the telescopic end contacts a convex surface.

In some of the embodiments, the hydraulic damper includes a damper housing and a damper piston rod; the damper housing is fixedly mounted on the box body; the damper piston rod is sleeved in the damper housing along the longitudinal direction of the box body, and reciprocates relative to the damper housing along the longitudinal direction; both longitudinal ends of the damper piston rod pass through the damper housing, wherein the longitudinal end of the damper piston rod facing the rotating part is a telescopic end, and the other longitudinal end is supported on the inner wall of the box body through a return spring.

In some of the embodiments, the telescopic end is rotatably connected to a roller, and the roller is in contact with the driving surface.

In some embodiments, a resist is provided on the outer peripheral surface of the driving portion facing away from the driving surface, and the box body is provided with a blocking member for blocking the resist; when the resist rotates with the rotating member until it abuts against the blocking member, the opening angle of the door body is limited to a maximum angle.

In some embodiments, the box body includes a support box and a rotating member mounting box; a first mounting cavity is provided inside the support box, and a first opening communicating with the first mounting cavity is provided at one longitudinal end of the support box; a second mounting cavity is provided inside the rotating member mounting box, and a second opening communicating with the second mounting cavity is provided at one longitudinal end of the support box, and a third opening communicating with the second mounting cavity is provided on one vertical side of the support box; one end of the rotating member mounting box provided with the second opening is detachably connected to one end of the support box provided with the first opening, and the first mounting cavity is communicated with the second mounting cavity through the first opening and the second opening; the hydraulic damper is installed in the first mounting cavity, and its telescopic end passes through the first opening and the second opening to extend into the second mounting cavity; the rotating member is installed in the second mounting cavity, and its connecting part passes through the third opening.

In some embodiments, there are two connecting parts, which are respectively connected to the vertical ends of the driving part, and both connecting parts are rotatably connected to the box body, wherein one connecting part passes through the box body and is connected to the rotating shaft of the door body.

In some of the embodiments, the connection portion connected to the rotating shaft is provided with an inserting portion for inserting into a slot provided at a vertical end portion of the rotating shaft.

In addition, the utility model also provides an upright refrigerator, including a box body and a door body for opening or closing the front opening of the box body, one side of the door body is fixedly connected to a rotating shaft, and the box body is installed with an automatic door closing hinge for a refrigerator as described in any of the above technical solutions, and the connecting part of the rotating part of the automatic door closing hinge for the refrigerator is connected to the rotating shaft of the door body, and the rotating part rotates synchronously with the rotating shaft.

Compared with the prior art, the advantages and positive effects of the utility model are:

1. The automatic door closing hinge for refrigerators provided by the utility model realizes a slow door closing action by slowly resetting and extending the hydraulic damper under the action of hydraulic pressure, and cooperates with the convex surface and concave surface alternately arranged on the rotating part, which can effectively avoid the door body from hitting the box body when closing quickly, reduce the door closing sound, and improve the customer experience;

2. The automatic door closing hinge for the refrigerator provided by the utility model has a simple structure, is easy to install, has a long service life and low maintenance cost;

3. The automatic door closing hinge for the refrigerator provided by the utility model can limit the door body when the door body is opened to the maximum angle, so that the door body is kept at the maximum opening angle position, which is convenient for replenishment.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

FIG1 is a perspective view of an automatic door closing hinge for a refrigerator provided by an embodiment of the utility model, in which a rotating member corresponds to a door closed state;

FIG2 is a front view of an automatic door closing hinge for a refrigerator with a rotating member corresponding to a door closed state provided by an embodiment of the utility model;

FIG3 is a rear view of an automatic door closing hinge for a refrigerator with a rotating member corresponding to a door closed state provided by an embodiment of the utility model;

FIG4 is a top view of an automatic door closing hinge for a refrigerator with a rotating member corresponding to a door closed state provided by an embodiment of the utility model;

FIG5 is a bottom view of an automatic door closing hinge for a refrigerator with a rotating member corresponding to a door closed state provided by an embodiment of the utility model;

FIG6 is a right side view of an automatic door closing hinge for a refrigerator with a rotating member corresponding to a door closed state provided by an embodiment of the utility model;

FIG7 is a left side view of an automatic door closing hinge for a refrigerator with a rotating member corresponding to a door closed state provided by an embodiment of the utility model;

FIG8 is a front view of an automatic door closing hinge for a refrigerator provided by an embodiment of the utility model, in which the rotating member corresponds to a state where the door body is opened to the maximum angle;

FIG9 is an exploded view of an automatic door closing hinge for a refrigerator provided by one embodiment of the utility model;

Fig. 10 is a cross-sectional view along line A-A in Fig. 2;

Fig. 11 is a cross-sectional view along line B-B in Fig. 4;

Fig. 12 is a cross-sectional view along line C-C in Fig. 8;

FIG13 is a schematic structural diagram of a rotating member in an automatic door closing hinge for a refrigerator provided by an embodiment of the utility model;

Fig. 14 is a cross-sectional view along line D-D in Fig. 13;

FIG. 15 is a schematic structural diagram of a rotating member fixing seat in an automatic door closing hinge for a refrigerator provided by an embodiment of the utility model.

In the figure:

1. Box body; 2. Rotating part; 3. Hydraulic damper; 4. Return spring;

11. Support box; 111. First installation cavity; 12. Rotating member installation box; 121. Second installation cavity; 122. Stopper;

21. plug-in portion; 22. connection portion; 23. driving portion; 231. driving surface; 2311. convex surface; 2312. concave surface; 24. abutment;

31. Damper housing; 32. Damper piston rod; 321. Telescopic end; 33. Roller;

a, first opening; b, second opening; c, third opening.

DETAILED DESCRIPTION

The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

In the description of the present invention, it should be understood that the term "longitudinal" refers to the left-right direction in Figure 2, and "vertical" refers to the up-down direction in Figure 2; the terms "inside", "outside", etc. indicate directions or positional relationships based on the positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and 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 therefore cannot be understood as a limitation on the present invention.

In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

As shown in Figures 1 to 14, in an illustrative embodiment of the automatic door closing hinge for a refrigerator of the utility model, the automatic door closing hinge for a refrigerator comprises a box body 1, a rotating member 2 and a hydraulic damper 3; the box body 1 is installed on the box body of the refrigerator; the rotating member 2 is located at one longitudinal end of the box body 1, and the rotating member 2 comprises a driving portion 23 and a connecting portion 22 connected to the vertical end of the driving portion 23; the connecting portion 22 is rotatably connected to the box body 1 so that the rotating member 2 rotates relative to the box body 1 with a vertical line as the rotation axis, the connecting portion 22 passes through the box body 1 and is connected to the rotating shaft of the door body to drive the door body and the rotating member 2 to rotate synchronously; the outer peripheral surface of one side of the driving portion 23 is a driving surface 231, and the driving surface 231 comprises a convex surface 2311 and a concave surface 2312 arranged alternately; the hydraulic damper 3 is installed The rotatable member 2 is in the box body 1 and extends and retracts along the longitudinal direction of the box body 1, and its telescopic end 321 is always in contact with the convex surface 2311 of the driving surface 231; when the door body is opened to the maximum angle, the rotatable member 2 rotates until the convex surface 2311 faces the telescopic end 321, the telescopic end 321 contacts the side of the convex surface 2311 away from the concave surface 2312, and the telescopic end 321 is in a retracted state; in the process of closing the door body, the rotatable member 2 rotates with the door body, the telescopic end 321 extends out and slides along the convex surface 2311 toward the concave surface 2312; when the door body is closed, the rotatable member 2 rotates until the concave surface 2312 faces the telescopic end 321, the telescopic end 321 contacts the side of the convex surface 2311 close to the concave surface 2312, and the telescopic end 321 is in an extended state and accommodated in the concave surface 2312.

As shown in FIGS. 10 to 12 , the working principle of the automatic door closing hinge for the refrigerator is as follows: when the door body is in a closed state, the rotating member 2 rotates until the concave surface 2312 of the driving surface 231 is directly opposite to the telescopic end 321 of the hydraulic damper 3, and the telescopic end 321 contacts the side of the convex surface 2311 close to the concave surface 2312, and the telescopic end 321 is in an extended state and accommodated in the concave surface 2312; when the door body is opened, the rotating member 2 rotates with the door body, and since the convex surface 2311 of the rotating member 2 contacts the telescopic end 321, the rotating member 2 will push the telescopic end 321 along the convex surface 2311 Slide in the direction away from the concave surface 2312 to squeeze the telescopic end 321, so that the telescopic end 321 retracts; when the door body is opened to the maximum angle, the rotating member 2 rotates until the convex surface 2311 is opposite to the telescopic end 321, and the telescopic end 321 contacts the side of the convex surface 2311 away from the concave surface 2312; when the door body is released or closed, the telescopic end 321 slowly returns to its original position and extends due to the internal hydraulic pressure of the hydraulic damper 3, and the telescopic end 321 slides along the convex surface 2311 toward the concave surface 2312 to push the rotating member 2 to drive the door body to rotate in the closing direction, thereby realizing slow door closing.

The automatic door-closing hinge for the refrigerator is configured such that the hydraulic damper 3 is slowly reset and extended under the action of hydraulic pressure, and cooperates with the convex surface 2311 and the concave surface 2312 alternately configured on the rotating member 2 to achieve a slow door-closing action, which can effectively prevent the door body from hitting the box body when closing quickly, reduce the door-closing sound, and improve the customer experience. Moreover, the automatic door-closing hinge for the refrigerator is simple in structure, easy to install, and has a long service life and low maintenance cost.

As shown in FIG. 12 , when the door body is opened to the maximum angle, the line of action of the force applied by the telescopic end 321 to the convex surface 2311 passes through the rotation axis of the rotating member 2, so that when the door body is opened to the maximum angle, after the door body is released, the door body will remain at the maximum opening angle position, which is convenient for replenishment. Furthermore, when the opening angle of the door body is less than the maximum angle, the telescopic end 321 applies a torque to the rotating member 2 in the closing direction of the door body, so that the rotating member 2 can drive the door body to rotate in the closing direction to achieve slow closing. It should be noted that the maximum angle is preferably 90°-105°.

As shown in Fig. 12 to Fig. 15, a stopper 24 is provided on the outer peripheral surface of the driving part 23 away from the driving surface 231, and the box body 1 is provided with a stopper 122 for blocking the stopper 24; when the stopper 24 rotates with the rotating member 2 to abut against the stopper 122, the opening angle of the door body is limited to the maximum angle. The cooperation between the stopper 24 and the stopper 122 can limit the opening angle of the door body, and avoid the failure of the automatic door closing function due to excessive opening angle of the door body.

In order to facilitate the matching with the telescopic end 321 of the hydraulic damper 3, as shown in Figures 12 to 14, the driving surface 231 specifically includes two convex surfaces 2311 and a concave surface 2312, the concave surface 2312 is connected between the two convex surfaces 2311, and the concave surface 2312 and the convex surface 2311 are smoothly transitioned, the convex surface 2311 is a convex arc surface, and the concave surface 2312 is a concave arc surface, so that the cross section of the driving part 23 is cashew-shaped; when the door body is opened to the maximum angle, the telescopic end 321 contacts with a convex surface 2311. Setting the cross section of the driving part 23 to be cashew-shaped and using the convex surface 2311 with a convex arc surface can effectively slow down the extension speed of the telescopic end 321 of the hydraulic damper 3 and achieve slow door closing. Moreover, using the concave surface 2312 with a concave arc surface can better accommodate the telescopic end 321 of the hydraulic damper 3 when the door body is closed.

As shown in Fig. 9 to Fig. 12, the hydraulic damper 3 includes a damper housing 31 and a damper piston rod 32; the damper housing 31 is fixedly mounted on the box body 1; the damper piston rod 32 is sleeved in the damper housing 31 along the longitudinal direction of the box body 1, and reciprocates relative to the damper housing 31 along the longitudinal direction; both longitudinal ends of the damper piston rod 32 penetrate the damper housing 31, wherein the longitudinal end of the damper piston rod 32 facing the rotating member 2 is the telescopic end 321, and the other longitudinal end is supported on the inner wall of the box body 1 through the return spring 4. When the door body is opened, the damper piston rod 32 is squeezed by the rotating member 2 and moves in the direction of the original rotating member 2, and then the return spring 4 is compressed; in the process of closing the door body, the return spring 4 restores its deformation, and then pushes the damper piston rod 32 to move in the direction of the rotating member 2, thereby pushing the rotating member 2 to rotate. The use of the return spring 4 in combination with the hydraulic damper 3 has a better door closing damping effect and can significantly reduce the door closing force. Moreover, the double damping guarantee is conducive to extending the service life.

In order to facilitate the matching with the convex surface 2311 of the rotating member 2, as shown in Figures 9 to 11, the telescopic end 321 is rotatably connected with a roller 33, and the roller 33 contacts the driving surface 231. The contact between the roller 33 and the driving surface 231 is conducive to reducing friction, making it easier to open and close the door, making the door opening and closing smoother, avoiding jamming, and helping to reduce wear between components.

In order to facilitate the installation of the hydraulic damper 3 and the rotating member 2 in the box body 1, as shown in Figures 9, 10 and 15, the box body 1 includes a support box 11 and a rotating member installation box 12; the support box 11 is provided with a first installation cavity 111 inside, and a first opening a connected to the first installation cavity 111 is provided at one longitudinal end thereof; the rotating member installation box 12 is provided with a second installation cavity 121 inside, and a second opening b connected to the second installation cavity 121 is provided at one longitudinal end thereof, and a second opening b connected to the second installation cavity 121 is provided at one vertical side thereof. The third opening c is connected; one end of the rotating member mounting box 12 having the second opening b can be detachably connected to the end of the support box 11 having the first opening a, and the first mounting cavity 111 is connected to the second mounting cavity 121 through the first opening a and the second opening b; the hydraulic damper 3 is installed in the first mounting cavity 111, and its telescopic end 321 passes through the first opening a and the second opening b to extend into the second mounting cavity 121; the rotating member 2 is installed in the second mounting cavity 121, and its connecting portion 22 passes through the third opening c.

In order to facilitate the installation of the rotating member 2 on the box body 1, as shown in Figures 11 and 13, there are two connecting parts 22, and the two connecting parts 22 are respectively connected to the vertical ends of the driving part 23. The two connecting parts 22 are both rotatably connected to the box body 1, wherein one connecting part 22 passes through the box body 1 and is connected to the rotating shaft of the door body.

In order to facilitate the connection of the door body shaft and ensure that the rotating member 2 rotates synchronously with the door body shaft, as shown in Figure 13, the connecting portion 22 connected to the shaft is provided with a plug-in portion 21 for plugging into a slot provided at the vertical end of the shaft. By matching the provided plug-in portion 21 with the slot provided at the end of the door body shaft, it is possible to ensure that the rotating member 2 rotates synchronously with the door body shaft, and ensure that there is no relative rotation between the rotating member 2 and the door body shaft.

Based on the above-mentioned automatic door closing hinge for refrigerators, the utility model also provides a vertical refrigerator, including a box body and a door body for opening or closing the front opening of the box body, one side of the door body is fixedly connected to a rotating shaft, the box body is installed with the above-mentioned automatic door closing hinge for refrigerators, the connecting part 22 of the rotating member 2 of the automatic door closing hinge for refrigerators is connected to the rotating shaft of the door body, and the rotating member 2 rotates synchronously with the rotating shaft.

Finally, it should be noted that: the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

The above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the specific implementation methods of the utility model can still be modified or some technical features can be replaced by equivalents without departing from the spirit of the technical solution of the utility model, which should be included in the scope of the technical solution for which protection is requested in the utility model.

Claims (10)

1. An automatic door closing hinge for a refrigerator, characterized by comprising: A box body, wherein the box body is installed in a box body of the refrigerator; A rotating member, the rotating member is located at one longitudinal end of the box body, the rotating member comprises a driving part and a connecting part connected to the vertical end of the driving part; the connecting part is rotatably connected to the box body, the connecting part passes through the box body and is connected to the rotating shaft of the door body, and the rotating member rotates relative to the box body with a vertical line as the rotation axis; one side outer peripheral surface of the driving part is a driving surface, and the driving surface comprises a convex surface and a concave surface arranged alternately; A hydraulic damper, wherein the hydraulic damper is installed in the box body and extends and retracts along the longitudinal direction of the box body, and the retractable end thereof is always in contact with the convex surface of the driving surface; when the door body is opened to the maximum angle, the rotating member rotates until the convex surface faces the retractable end, the retractable end contacts the side of the convex surface away from the concave surface, and the retractable end is in a retracted state; during the closing process of the door body, the rotating member rotates with the door body, the retractable end extends out and slides along the convex surface toward the concave surface; when the door body is closed, the rotating member rotates until the concave surface faces the retractable end, the retractable end contacts the side of the convex surface close to the concave surface, and the retractable end is in an extended state and accommodated in the concave surface. 2. The automatic door closing hinge for a refrigerator according to claim 1 is characterized in that when the door body is opened to a maximum angle, the line of action of the force applied by the telescopic end to the convex surface passes through the rotation axis of the rotating member. 3. The automatic door closing hinge for a refrigerator according to claim 1 or 2 is characterized in that the driving surface includes two convex surfaces and one concave surface, the concave surface is connected between the two convex surfaces, and the concave surface and the convex surface have a smooth transition, the convex surface is a convex arc surface, and the concave surface is a concave arc surface, so that the cross-section of the driving part is cashew-shaped; when the door body is opened to the maximum angle, the telescopic end contacts one of the convex surfaces. 4. The automatic door closing hinge for a refrigerator according to claim 1 is characterized in that the hydraulic damper includes a damper housing and a damper piston rod; the damper housing is fixedly mounted on the box body; the damper piston rod is sleeved in the damper housing along the longitudinal direction of the box body, and reciprocates relative to the damper housing along the longitudinal direction; both longitudinal ends of the damper piston rod pass through the damper housing, wherein the longitudinal end of the damper piston rod facing the rotating member is the telescopic end, and the other longitudinal end is supported on the inner wall of the box body through a return spring. 5. The automatic door closing hinge for a refrigerator according to claim 1 or 4, characterized in that the telescopic end is rotatably connected to a roller, and the roller is in contact with the driving surface. 6. The automatic door closing hinge for a refrigerator according to claim 1 is characterized in that a resistance member is provided on the outer peripheral surface of the driving part facing away from the driving surface, and the box body is provided with a blocking member for blocking the resistance member; when the resistance member rotates with the rotating member to abut against the blocking member, the opening angle of the door body is limited to a maximum angle. 7. The automatic door closing hinge for a refrigerator according to claim 1 is characterized in that the box body includes a support box and a rotating member mounting box; a first mounting cavity is provided inside the support box, and a first opening communicating with the first mounting cavity is provided at one longitudinal end of the support box; a second mounting cavity is provided inside the rotating member mounting box, and a second opening communicating with the second mounting cavity is provided at one longitudinal end of the support box, and a third opening communicating with the second mounting cavity is provided on one vertical side of the support box; one end of the rotating member mounting box provided with the second opening is detachably connected to one end of the support box provided with the first opening, and the first mounting cavity and the second mounting cavity are communicated through the first opening and the second opening; the hydraulic damper is installed in the first mounting cavity, and its telescopic end passes through the first opening and the second opening to extend into the second mounting cavity; the rotating member is installed in the second mounting cavity, and its connecting portion passes through the third opening. 8. The automatic door closing hinge for a refrigerator according to claim 1 is characterized in that there are two connecting parts, the two connecting parts are respectively connected to the vertical ends of the driving part, and the two connecting parts are rotatably connected to the box body, wherein one connecting part passes through the box body and is connected to the rotating shaft of the door body. 9. The automatic door closing hinge for a refrigerator according to claim 1 or 8, characterized in that the connecting portion connected to the rotating shaft is provided with an inserting portion for inserting into a slot provided at a vertical end of the rotating shaft. 10. An upright refrigerator, comprising a box body and a door body for opening or closing the front opening of the box body, one side of the door body being fixedly connected to a rotating shaft, characterized in that the box body is equipped with an automatic door closing hinge for a refrigerator as described in any one of claims 1 to 9, the connecting portion of the rotating member of the automatic door closing hinge for a refrigerator is connected to the rotating shaft of the door body, and the rotating member rotates synchronously with the rotating shaft.