Hinge structure of refrigerator door and refrigerator

Abstract

The present invention provides a hinge structure of a refrigerator door body and a refrigerator, the refrigerator comprises an upper door body and a lower door body located below the upper door body, the hinge structure comprises: a support member connected to a housing of the refrigerator and arranged between the upper door body and the lower door body; a hinge shaft arranged vertically, the hinge shaft comprises an upper shaft body, a middle shaft body and a lower shaft body, the upper shaft body abuts against the bottom of the upper door body, the middle shaft body is threadedly connected to the support member, and the lower shaft body is located below the support member; a transmission mechanism comprises a first bevel gear and a second bevel gear meshed with the first bevel gear, the first bevel gear is connected to the lower shaft body and can drive the lower shaft body to rotate. Since the transmission mechanism is composed of bevel gears, and the bevel gears can provide a large driving force while occupying a small space, the hinge structure can provide the upper door body with a sufficiently large thrust to adjust the height of the upper door body.

Description

Technical Field

[0001] The invention relates to a hinge, and in particular to a hinge structure of a refrigerator door and a refrigerator. Background Art

[0002] During the production process of refrigerators, the installation height of the door body is often incorrect due to assembly errors. At this time, the height of the door body needs to be fine-tuned, that is, the height of the door body needs to be slightly raised or lowered. The device for adjusting the height of the door body is generally set under the refrigerator door body, and the height of the door body is raised or lowered by jacking. For the lower door body of the refrigerator, the adjustment device can be hidden at the bottom of the refrigerator, and there is sufficient space for arrangement. For the upper door body, due to the limited space under the upper door body, it is difficult to arrange the adjustment device, and the size of the adjustment device cannot be made larger. Therefore, it is often difficult to generate sufficient thrust due to the insufficient size of the adjustment device. Summary of the invention

[0003] An object of the present invention is to provide a hinge structure and a refrigerator capable of adjusting the height of an upper door of the refrigerator.

[0004] In particular, the present invention provides a hinge structure of a refrigerator door body, the refrigerator comprising an upper door body and a lower door body located below the upper door body, the hinge structure comprising:

[0005] A support member connected to the housing of the refrigerator and arranged between the upper door body and the lower door body;

[0006] The hinge shaft is arranged vertically, and comprises an upper shaft body, a middle shaft body and a lower shaft body. The upper shaft body abuts against the bottom of the upper door body, the middle shaft body is threadedly connected to the support member, and the lower shaft body is located below the support member;

[0007] The transmission mechanism comprises a first bevel gear and a second bevel gear meshing with the first bevel gear, wherein the first bevel gear is connected to the lower shaft body and can drive the lower shaft body to rotate;

[0008] Wherein, the hinge shaft is configured to rise relative to the support member when rotating along a first direction around an axis parallel to its length direction so that the upper door body rises, and to descend relative to the support member when rotating along a second direction around an axis parallel to its length direction so that the upper door body descends.

[0009] Furthermore, the tooth surface of the first bevel gear faces away from the central axis body, and the second bevel gear is arranged below the first bevel gear and its rotation axis is arranged transversely.

[0010] Furthermore, the rotation axis of the second bevel gear is parallel to the plane where the upper door body is located.

[0011] Further, the center of the second bevel gear has a prismatic hole, and the prismatic hole extends along the rotation axis direction of the second bevel gear.

[0012] Further, the lower shaft body extends into the lower door body, and the lower shaft body is configured to allow the lower door body to rotate around it;

[0013] The transmission mechanism is arranged in the lower door body.

[0014] Furthermore, the lower door body includes a hinge hole arranged at the top thereof, the lower shaft body passes through the hinge hole and extends into the lower door body, the upper hub of the first bevel gear is sleeved with a bearing, and the bearing and the hinge hole are shaft-hole matched.

[0015] Furthermore, the hinge structure also includes:

[0016] The protective cover is arranged in the lower door body, and the transmission mechanism is arranged in the protective cover.

[0017] Furthermore, the upper shaft body includes an extension column and an abutment portion, which is arranged at the lower portion of the peripheral wall of the extension column. The extension column extends upward from the bottom of the lower door body into the upper door body, and the abutment portion abuts the bottom of the lower door body. The extension column is configured to enable the upper door body to rotate around its central axis.

[0018] Further, the abutment portion is arranged at the upper end of the central axis body, and when the abutment portion abuts against the support member, the hinge shaft is in a lower limit position relative to the support member.

[0019] A second aspect of the present invention further provides a refrigerator, comprising an upper door body and a lower door body located below the upper door body, and further comprising:

[0020] The hinge structure of any of the above items.

[0021] The hinge shaft in the hinge structure of the present invention includes three sections: an upper shaft body, a middle shaft body and a lower shaft body. The middle shaft body is threadedly connected to a support member arranged between the upper door body and the lower door body, so that the vertical height of the hinge shaft can be changed by rotation. The upper shaft body of the hinge shaft abuts against the bottom of the upper door body, so when the vertical height of the hinge shaft changes, the vertical height of the upper door body will also change. At the same time, a transmission mechanism is arranged below the support member, and the transmission mechanism can drive the lower shaft body located in the lower door body of the refrigerator to rotate after obtaining the driving force. Since the transmission mechanism is composed of bevel gears, and the bevel gears can provide a large driving force while occupying a small space, the hinge structure can provide the upper door body with a sufficiently large thrust to adjust the height of the upper door body.

[0022] Based on the following detailed description of specific embodiments of the present invention in conjunction with the accompanying drawings, those skilled in the art will become more aware of the above and other objects, advantages and features of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Hereinafter, some specific embodiments of the present invention will be described in detail in an exemplary and non-limiting manner with reference to the accompanying drawings. The same reference numerals in the accompanying drawings indicate the same or similar components or parts. It should be understood by those skilled in the art that these drawings are not necessarily drawn to scale. In the accompanying drawings:

[0024] Figure 1 is a three-dimensional schematic diagram of a hinge structure installed in an upper door body and a lower door body according to an embodiment of the present invention;

[0025] Figure 2 is a rear view schematic diagram of a hinge structure installed in an upper door body and a lower door body according to an embodiment of the present invention;

[0026] Figure 3 yes Figure 2 A full cross-sectional diagram of

[0027] Figure 4 yes Figure 3 A partial enlarged schematic diagram of

[0028] Figure 5 is a side view schematic diagram of a hinge structure installed in an upper door body and a lower door body according to an embodiment of the present invention;

[0029] Figure 6 yes Figure 5 A full cross-sectional diagram of

[0030] Figure 7 is an exploded schematic diagram of a hinge structure and an upper door body and a lower door body according to an embodiment of the present invention;

[0031] Figure 8 is a side view schematic diagram of a hinge structure installed in an upper door body and a lower door body according to another embodiment of the present invention;

[0032] Fig. 9 It is a cross-sectional schematic diagram of a hinge structure installed in an upper door body and a lower door body according to another embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] like Figures 1 to 9 The following is a preferred embodiment of the present invention. Figures 1 to 7 The hinge structure in one embodiment is shown. Figures 8 to 9It is noted that, for ease of viewing, only partial structures of the upper door body 10 and the lower door body 20 in each illustration are shown. Figure 1 The direction Z in the figure is the vertical direction, the direction Y is the direction from the back of the refrigerator to the front of the refrigerator, and the direction X is the direction from the right side of the refrigerator to the left side of the refrigerator when facing the refrigerator.

[0035] The present embodiment provides a hinge structure arranged on a refrigerator door body. The refrigerator includes an upper door body 10 and a lower door body 20 located below the upper door body 10 . The hinge structure is used to adjust the height of the upper door body 10 .

[0036] The hinge structure includes a support member 100, a hinge shaft 200 and a transmission mechanism. The support member 100 is arranged between the upper door body 10 and the lower door body 20 (indicates that the vertical height of the support member 100 is lower than the upper door body 10 and higher than the lower door body 20, and the projection of the support member 100 in the horizontal plane may or may not coincide with the projection of the upper door body 10 or the lower door body 20 in the horizontal plane). The support member 100 is fixed to the shell of the refrigerator. Specifically, all exposed surface walls of the refrigerator after removing the door body can be referred to as the shell, that is, in this application, the inner tank and the crossbeam inside the refrigerator can be referred to as the shell of the refrigerator.

[0037] In order to enable the support member 100 to withstand greater pressure without occupying too much effective space, in one embodiment, the support member 100 can be connected to the crossbeam of the refrigerator between the upper door body 10 and the lower door body 20. Specifically, the support member 100 can be plate-shaped and horizontally extend along the outer side of the crossbeam in a direction away from the refrigerator. The support member 100 can also be formed integrally with the crossbeam, that is, the support member 100 can be a flange extending laterally from the crossbeam.

[0038] The hinge shaft 200 is arranged vertically, specifically perpendicular to the horizontal plane. The hinge shaft 200 includes three sections. For ease of description, the hinge shaft 200 is hereinafter referred to as the upper shaft body 210, the middle shaft body 220, and the lower shaft body 230 when it is in the working position.

[0039] The hinge shaft 200 vertically passes through the support member 100, and the central axis 220 of the hinge shaft 200 is threadedly connected to the support member 100, so that the hinge shaft 200 can change its vertical height by rotating. Specifically, the central axis 220 of the hinge shaft 200 can be provided with screw threads, and the support member 100 can be provided with threaded holes. When the hinge shaft 200 rotates along an axis parallel to its length, the hinge shaft 200 rotates along a axis parallel to its length. Figure 3 When the hinge shaft 200 rotates in the first direction M shown, it rises relative to the support member 100 ; when the hinge shaft 200 rotates in the second direction (the direction opposite to the first direction M) around an axis parallel to its length direction, it descends relative to the support member 100 .

[0040] The upper shaft body 210 of the hinge shaft 200 abuts against the bottom of the upper door body 10, so when the hinge shaft 200 rotates and rises in the first direction M, its upper shaft body 210 will abut against the bottom of the refrigerator upper door body 10 and lift the upper door body 10. When the hinge shaft 200 rotates in the second direction, the vertical height of its upper shaft body 210 decreases, so that the vertical height of the upper door body 10 pressed against the upper shaft body 210 is also reduced. Therefore, the height of the refrigerator upper door body 10 can be adjusted by driving the hinge shaft 200 to rotate.

[0041] In one embodiment, the lower shaft body 230 of the hinge shaft 200 can extend downward into the lower door body 20 of the refrigerator, and the lower door body 20 can rotate around it, that is, the lower door body 20 includes a hinge hole 21 located at the top thereof, and the lower shaft body 230 of the hinge shaft 200 passes downward through the hinge hole 21 and extends into the lower door body 20. The lower shaft body 230 serves as the rotation axis of the lower door body 20, and the lower door body 20 of the refrigerator rotates around the hinge shaft 200 during the opening and closing process of the lower door body 20 of the refrigerator. At the same time, the hinge structure also includes a transmission mechanism, and the transmission mechanism can be arranged in the lower door body 20 of the refrigerator. After obtaining the driving force, the transmission mechanism can drive the lower shaft body 230 located in the lower door body 20 of the refrigerator to rotate, and the operator can adjust the height of the upper door body 10 of the refrigerator by driving the transmission mechanism located in the lower door body 20 of the refrigerator. Since the transmission mechanism is arranged in the lower door body 20 of the refrigerator, and the space in the lower door body 20 of the refrigerator is relatively sufficient, the arrangement of the transmission mechanism is very convenient. At the same time, the size of the hinge shaft 200 is only limited by the thickness of the lower door body 20, so its size can be set larger to allow it to transmit sufficient thrust. In addition, the transmission mechanism is arranged in the lower door body 20 so that it can be better protected and is not prone to failure.

[0042] In another embodiment, the lower shaft body 230 of the hinge shaft 200 and the transmission mechanism may not be disposed in the lower door body 20, the lower door body 20 has a separate rotation shaft, and a gap is left at the position corresponding to the hinge structure of the lower door body 20 to accommodate the transmission mechanism. That is, there is no connection structure between the hinge structure and the lower door body 20.

[0043] When the lower shaft body 230 of the hinge shaft 200 and the transmission mechanism are arranged in the lower door body 20, the transmission mechanism may include a first bevel gear 310 and a second bevel gear 320 meshing with the first bevel gear 310. The first bevel gear 310 is connected to the lower shaft body 230 and can drive the lower shaft body 230 to rotate. Specifically, the second bevel gear 320 includes a hub 311, which is located above the gear teeth of the second bevel gear 320 in the working state, and a bearing is sleeved on the hub 311, and the bearing can be matched with the hinge hole 21 of the lower door body 20 in the form of an axis hole, so that the lower door body 20 can rotate freely around the lower shaft body 230.

[0044] The second bevel gear 320 meshes with the first bevel gear 310, so by driving the second bevel gear 320, the first bevel gear 310 can be rotated, thereby rotating the hinge shaft 200. The bevel gear can transmit a large torque, so the transmission mechanism using the bevel gear can transmit a large torque while being small in size, reducing the space occupied by the transmission mechanism. Of course, in other embodiments, the transmission mechanism may also include common transmission components such as spur gears or drive chains.

[0045] In order to further reduce the effective space occupied by the transmission mechanism, the first bevel gear 310 and the second bevel gear 320 can be formed by Figure 3 The first bevel gear 310 is arranged in the manner shown. That is, after the first bevel gear 310 is connected to the lower shaft body 230, its rotation axis is arranged vertically, and the tooth surface of the first bevel gear 310 is away from the middle shaft body 220 (the tooth surface of the first bevel gear 310 is tilted downward after it is in the working position). The second bevel gear 320 is arranged below the first bevel gear 310 and its rotation axis is arranged horizontally. The vertical projection area of ​​the hinged end of the lower door body 20 of the refrigerator is usually not provided with other components, so arranging the first bevel gear 310 and the second bevel gear 320 according to the above structure can minimize the possibility of position interference between the transmission mechanism and the internal components of the lower door body 20 of the refrigerator.

[0046] The transmission mechanism is used to transmit power, and the source of power can be a driving motor 600 or manpower. When the power source is manpower, in one embodiment, a prism hole 321 can be set at the center of the second bevel gear 320, and the prism hole 321 extends along the rotation axis direction of the second bevel gear 320. The prism hole 321 can specifically be a regular hexagonal prism hole 321, and it can be a through hole, or a blind hole or a countersunk hole. The lower door body 20 is provided with an adjustment hole 22, and the adjustment hole 22 is directly opposite to the prism hole 321, so that the prism hole 321 of the second bevel gear 320 is exposed to the door body, so that when the operator adjusts the height of the upper door body 10, he can use an external tool to pass through the adjustment hole 22 and extend into the prism hole 321 of the second bevel gear 320, and drive the second bevel gear 320 to rotate by driving the external tool to rotate, and finally rotate the hinge shaft 200.

[0047] In one embodiment, Figures 8 to 9As shown, the power source of the transmission mechanism can also be a driving motor 600, which is connected to the second bevel gear 320 of the transmission mechanism to drive the second bevel gear 320 to rotate. In particular, since the second bevel gear 320 is positioned in the lower door body 20, when there is no need to adjust the height of the upper door body 10, during the opening and closing of the lower door body 20, the lower shaft body 230 of the hinge shaft 200 and the first bevel gear 310 do not move, and the second bevel gear 320 rotates around the axis of the first bevel gear 310. Since the second bevel gear 320 is meshed with the first bevel gear 310, the second bevel gear 320 rotates around its own axis while rotating around the axis of the first bevel gear 310 (it can be understood that the second bevel gear 320 rotates around the first bevel gear 310 while revolving). On the contrary, if the second bevel gear 320 is connected to the drive motor 600, when the drive motor 600 drives the second bevel gear 320 to rotate, the door body will generate an opening and closing movement. The premise for the drive motor 600 to drive the door body to generate an opening and closing movement is that the lower shaft 230 and the first bevel gear 310 are stationary.

[0048] like Figure 3 As shown, when the driving motor 600 drives the second bevel gear 320 to rotate around its own axis in the N direction, the second bevel gear 320 will rotate around the axis of the first bevel gear 310 in the second direction (the opposite direction of the first direction M), which will drive the lower door body 20 to rotate around the axis of the first bevel gear 310 in the second direction, and the lower door body 20 moves in the closing direction. When the driving motor 600 drives the second bevel gear 320 to rotate around its own axis in the opposite direction of the N direction, the second bevel gear 320 will rotate around the axis of the first bevel gear 310 in the first direction M, which will drive the lower door body 20 to rotate around the axis of the first bevel gear 310 in the first direction M, and the lower door body 20 moves in the opening direction. That is, when the drive motor 600 is connected to the second bevel gear 320, the drive motor 600 can not only rotate the first bevel gear 310 by driving the second bevel gear 320 (at this time, the position of the lower door body 20 needs to be fixed so that the second bevel gear 320 cannot revolve around the first bevel gear 310), but also automatically open and close the lower door body 20 by driving the second bevel gear 320 (at this time, the driving force of the drive motor 600 needs to be no greater than a certain value so that the lower shaft body 230 and the first bevel gear 310 are stationary). In particular, an intelligent control module can also be set in the refrigerator, and the drive motor 600 can automatically open and close the lower door body 20 of the refrigerator according to the door opening and closing signal transmitted by the intelligent control module, thereby realizing intelligent control of the refrigerator.

[0049] Since the front panel of the door body (the panel facing away from the refrigerator liner) has a large area, the error cost and processing difficulty of drilling holes on it are high (if the drilling error is large during processing, the entire front panel will be scrapped). And drilling holes on the front panel will affect the integrity and aesthetics of the refrigerator. Therefore, in one embodiment, the adjustment hole 22 can be set on the side panel of the lower door body 20 that is arranged vertically and perpendicular to the plane where the lower door body 20 is located. At this time, the rotation axis of the second bevel gear 320 is parallel to the plane where the lower door body 20 is located. Since the side panel of the lower door body 20 is in the shape of an elongated strip and has a small volume, the error cost during processing is small.

[0050] In a preferred embodiment, the adjustment hole 22 can also be set on the inner side plate of the lower door body 20 facing the refrigerator inner tank, and the rotation axis of the second bevel gear 320 is perpendicular to the door body. This structure can prevent the adjustment hole 22 from being exposed, better protect the internal components in the door body, prevent foreign objects from entering, and also make the refrigerator more beautiful as a whole.

[0051] In order to prevent foreign objects from entering the lower door 20 of the refrigerator, a protective plug 500 may be provided on the adjustment hole 22 of the refrigerator, and the protective plug 500 may be detachably provided on the adjustment hole 22. The protective plug 500 may be made of a flexible rubber material and cover the adjustment hole 22 by blocking. The protective plug 500 may also be made of other hard materials and cover the adjustment hole 22 by threaded connection.

[0052] In one embodiment, the upper shaft body 210 may only abut the upper door body 10 at the upper end, and it is only used to adjust the height of the upper door body 10. In another embodiment, the upper shaft body 210 may also be used as the rotation axis of the upper door body 10, that is, the upper door body 10 rotates around the upper shaft body 210 during the opening and closing process. Specifically, when the upper shaft body 210 can be used as the rotation axis of the upper door body 10, the upper shaft body 210 includes an extension column 211 and an abutment portion 212, the abutment portion 212 is arranged at the lower part of the peripheral wall of the extension column 211, the extension column 211 extends upward from the bottom of the lower door body 20 into the upper door body 10, the abutment portion 212 abuts the bottom of the lower door body 20, and the extension column 211 is configured to enable the upper door body 10 to rotate around its central axis. The abutment portion 212 can be a protrusion on the peripheral wall of the extension column 211, and it can be annular and arranged around the circumference of the extension column 211. Further, the abutment portion 212 may be provided at the lower end of the upper shaft body 210, and when the abutment portion 212 abuts against the support member 100, the hinge shaft 200 is at the lower limit position relative to the support member 100. Of course, in other embodiments, a blocking member may be provided at the upper portion of the middle shaft body 220, so that the blocking member limits the lower limit position of the hinge shaft 200 relative to the support member 100. Similarly, the blocking member may also be a protrusion on the peripheral wall of the middle shaft body 220, and the blocking member may also be annular and arranged around the circumference of the middle shaft body 220.

[0053] In one embodiment, the hinge structure may further include a protective cover 400. The protective cover 400 is disposed in the lower door body 20, and the transmission mechanism is disposed in the protective cover 400 and positioned on the protective cover 400. During assembly, the transmission mechanism may be first assembled on the protective cover 400 to form a whole, and then the protective cover 400 may be arranged in the door body of the refrigerator. This assembly method may, on the one hand, make the structure of the first bevel gear 310 and the second bevel gear 320 in the transmission mechanism more stable, and on the other hand, may make the integrity of the transmission mechanism stronger, so that the transmission mechanism may become an optional part of the lower door body 20 of the refrigerator. When a different transmission mechanism needs to be arranged in the lower door body 20, it is only necessary to replace the transmission mechanism and the whole formed by the protective cover 400 and the transmission mechanism. No complicated installation structure is required in the lower door body 20, which facilitates the processing and manufacturing of the lower door body 20.

[0054] like Figure 7 As shown, the protective sleeve 400 may include a first sleeve body 410 and a second sleeve body 420, and the first sleeve body 410 and the second sleeve body 420 both have a concave cavity. After the first sleeve body 410 and the second sleeve body 420 are connected, the two concave cavities merge to form a chamber for accommodating the transmission mechanism. The first bevel gear 310 and the second bevel gear 320 are both positioned in the above-mentioned chamber. The protective sleeve 400 also has an opening for the lower shaft body 230 to penetrate. After the protective sleeve 400 is assembled in the lower door body 20, the lower shaft body 230 penetrates into the protective sleeve 400 from top to bottom and is connected to the first bevel gear 310 in the protective sleeve 400.

[0055] The second aspect of the present invention further provides a refrigerator, which includes an upper door body 10, a lower door body 20, and a hinge structure in any of the above embodiments. The hinge structure is used to adjust the height of the upper door body 10. In particular, the refrigerator in this embodiment can have two upper door bodies 10 with two side-by-side doors and two lower door bodies 20 with two side-by-side doors, and the refrigerator can include two hinge structures, each hinge structure is respectively arranged between one of the upper door bodies 10 and one of the lower door bodies 20.

[0056] At this point, those skilled in the art should recognize that, although multiple exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications that conform to the principles of the present invention can still be directly determined or derived based on the content disclosed in the present invention without departing from the spirit and scope of the present invention. Therefore, the scope of the present invention should be understood and recognized as covering all these other variations or modifications.

Claims

1. A hinge structure of a refrigerator door, the refrigerator comprising an upper door and a lower door located below the upper door, characterized in that: The hinge structure comprises: A support member connected to the housing of the refrigerator and disposed between the upper door body and the lower door body; A hinge shaft, arranged vertically, comprising an upper shaft body, a middle shaft body and a lower shaft body, wherein the upper shaft body abuts against the bottom of the upper door body, the middle shaft body is threadedly connected to the support member, and the lower shaft body is located below the support member, extends into the lower door body, and is configured to enable the lower door body to rotate around it; A transmission mechanism is arranged in the lower door body, comprising a first bevel gear and a second bevel gear meshing with the first bevel gear, wherein the first bevel gear is connected to the lower shaft body and can drive the lower shaft body to rotate; Wherein, the hinge shaft is configured to rise relative to the support member when rotating in a first direction around an axis parallel to its length direction, so that the upper door body rises, and to fall relative to the support member when rotating in a second direction around an axis parallel to its length direction, so that the upper door body falls; The transmission mechanism further includes a driving motor connected to the second bevel gear and configured as follows: When the position of the lower door body is fixed, the first bevel gear is rotated by driving the second bevel gear, thereby achieving the raising or lowering of the hinge shaft; and When the lower shaft and the first bevel gear are stationary, the second bevel gear is driven to rotate around the axis of the first bevel gear and around its own axis at the same time, thereby realizing the opening or closing of the lower door body.

2. The hinge structure according to claim 1, characterized in that: The tooth surface of the first bevel gear faces away from the central shaft body, and the second bevel gear is arranged below the first bevel gear and its rotation axis is arranged transversely.

3. The hinge structure according to claim 2, characterized in that: The rotation axis of the second bevel gear is parallel to the plane where the upper door body is located.

4. The hinge structure according to claim 3, characterized in that: The second bevel gear has a prism hole at its center, and the prism hole extends along the rotation axis direction of the second bevel gear.

5. The hinge structure according to claim 1, characterized in that: The lower door body includes a hinge hole arranged at the top thereof, the lower shaft body passes through the hinge hole and extends into the lower door body, the upper hub of the first bevel gear is sleeved with a bearing, and the bearing is matched with the hinge hole in the form of an axial hole.

6. The hinge structure according to claim 1, characterized in that: Also includes: A protective cover is arranged in the lower door body, and the transmission mechanism is arranged in the protective cover.

7. The hinge structure according to claim 1, characterized in that: The upper shaft body includes an extension column and an abutment portion, the abutment portion is arranged at the lower portion of the peripheral wall of the extension column, the extension column extends upward from the bottom of the lower door body into the upper door body, the abutment portion abuts the bottom of the lower door body, and the extension column is configured to enable the upper door body to rotate around its central axis.

8. The hinge structure according to claim 7, characterized in that: The abutment portion is arranged at the upper end of the central axis body, and when the abutment portion abuts against the support member, the hinge shaft is in a lower limit position relative to the support member.

9. A refrigerator, comprising an upper door body and a lower door body located below the upper door body, characterized in that: The refrigerator further comprises: The hinge structure according to any one of claims 1 to 8.

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