A gravity return hinge device

Abstract

The utility model discloses a gravity return hinge device belongs to door body hinge field, including upper hinge, pin shaft, first shaft sleeve, second shaft sleeve and lower hinge, upper hinge is integral type structure, is constituted by upper hinge board, sleeve and pivot, upper hinge board bottom surface and sleeve top end vertical, pivot is located in the sleeve, and with sleeve coaxial arrangement, pivot top end and upper hinge board vertical, bottom end and stretch out sleeve, be equipped with first through -hole and second through -hole on the sleeve wall, be equipped with third through -hole on the pivot, and three through -holes coaxial arrangement, pin shaft passes first through -hole, third through -hole and second through -hole in proper order, and with three through -hole interference fit, first shaft sleeve rotatable sleeve on pin shaft between first through -hole and third through -hole section, second shaft sleeve rotatable sleeve on pin shaft between second through -hole and third through -hole section. Pin shaft and upper hinge jointly bear the weight of door body, greatly improved the bearing strength to door body, has promoted the service life of hinge.

Description

Technical Field

[0001] This utility model relates to the field of door hinge technology, and more specifically, to a gravity return hinge device. Background Technology

[0002] Large freezers, refrigerators, and other refrigeration equipment typically have heavy doors, requiring hinges with high load-bearing capacity. Utility model patent CN217872351U discloses a novel gravity-return hinge for freezers, comprising three components: the first component includes an upper hinge, a spindle perpendicularly connected to the upper hinge, and two short shafts mounted on the spindle; the second component, the assembly, includes a sleeve and a sleeve plate; and the third component is the lower hinge. The first and second components are assembled together to form an assembly, specifically, the spindle is placed inside the sleeve. Then, the hinge and sleeve plate are fixedly connected. This assembly is installed on the door, and the third component is mounted on the cabinet. The assembly and the third component rotate together to open and close the door. The problem is that during the opening and closing process, the two short shafts bear the entire weight of the door. Because there is a gap between the ends of the two short shafts and the inner wall of the sleeve, rather than a rigid connection, the load-bearing capacity of the short shafts is significantly reduced, thus shortening the hinge's lifespan. In addition, the assembly is made up of the first and second components rather than a single-piece structure. During the opening and closing of the door, the first and second components will have a small relative rotational displacement, which makes the door opening and closing uneven and results in a poor user experience.

[0003] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0004] The purpose of this utility model is to provide a gravity-return hinge device, aiming to solve at least one of the technical problems existing in the prior art. To achieve the above objective, the technical solution adopted is as follows:

[0005] A gravity-driven return hinge device includes an upper hinge, a pin, a first bushing, a second bushing, and a lower hinge. The upper hinge is an integral structure consisting of an upper hinge plate, a sleeve, and a rotating shaft. The bottom surface of the upper hinge plate is vertically and fixedly connected to the top surface of the sleeve. The rotating shaft is located inside the sleeve and is coaxially arranged with the sleeve. The top surface of the rotating shaft is vertically and fixedly connected to the upper hinge plate, and the bottom surface extends out of the sleeve. The sleeve wall has a first through hole and a second through hole, and the rotating shaft has a third through hole. The three through holes are coaxially arranged. The pin passes through the first through hole, the third through hole, and the second through hole in sequence and is interference-fitted with the three through holes. The first bushing is rotatably fitted on the section of the pin located between the first through hole and the third through hole, and the second bushing is rotatably fitted on the section of the pin located between the second through hole and the third through hole.

[0006] The lower hinge is an integral structure consisting of a lower hinge plate and a sliding seat. The lower hinge plate is provided with a fourth through hole. The sliding seat includes two sliding parts arranged circumferentially along the fourth through hole and connected end to end. Each sliding part consists of a first support body, a second support body, and a first stop body. The top surface of the first support body is a helical surface, and the top surface of the second support body is a plane. The plane is smoothly connected to the higher end of the helical surface. The first stop body is located on the plane of the top surface of the second support body.

[0007] The bottom end of the shaft passes through the fourth through hole and is fitted with the fourth through hole with a clearance. The two bushings and the two sliding parts correspond one to one. When the upper hinge is rotated, the first bushing and the second bushing can slide upward along the inclined spiral surface on the corresponding sliding part to the plane, and can be blocked and limited by the first stop body.

[0008] Preferably, the sliding part further includes a second stop, which is located outside the second support body, and the tops of the first stop and the second stop are flush.

[0009] Preferably, the inner wall of the sleeve is provided with two limiting protrusions, and the two limiting protrusions correspond one-to-one with the second stop bodies on the two sliding parts. When the upper hinge is rotated, the limiting protrusions can abut against the corresponding second stop bodies.

[0010] Preferably, an arc-shaped recessed groove is formed at the point where the two sliding parts meet end to end.

[0011] Preferably, the height difference between the bottom and top of the first support is 8-10 mm.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] This utility model discloses a gravity-return hinge device. A pin is interference-fitted with three through holes and supported by these holes. The pin and the upper hinge jointly bear the weight of the door, significantly improving the door's load-bearing capacity and extending the hinge's lifespan. The upper hinge is a one-piece structure, further enhancing the door's load-bearing capacity and ensuring good synchronization and noise-free operation during door rotation. Furthermore, the height difference of the inclined spiral surface is limited to 8mm, ensuring smooth door return to its original position and a superior user experience. Attached Figure Description

[0014] To more clearly illustrate the technical solution of this utility model, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a top view of the upper hinge structure of this utility model.

[0016] Figure 2 This is a bottom view of the upper hinge structure of this utility model.

[0017] Figure 3 This is a structural diagram of the upper hinge of this utility model.

[0018] Figure 4 This is a schematic diagram of the upper and lower hinges working together when the door is closed.

[0019] In the figure: 1. Pin; 2. First bushing; 3. Second bushing; 4. Upper hinge plate; 5. Sleeve; 6. Rotating shaft; 7. Limiting protrusion; 8. Lower hinge plate; 9. Fourth through hole; 10. First support body; 11. Second support body; 12. First stop body; 13. Second stop body; 14. Arc-shaped recessed groove. Detailed Implementation

[0020] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0021] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] A preferred embodiment of this utility model provides a gravity-return hinge device, which includes an upper hinge, a pin 1, a first bushing 2, a second bushing 3, and a lower hinge.

[0023] like Figures 1 to 2 As shown, the upper hinge consists of an upper hinge plate 4, a sleeve 5, and a pivot 6, forming an integral structure manufactured using a casting process. The bottom surface of the upper hinge plate 4 is vertically and fixedly connected to the top surface of the sleeve 5. The pivot 6 is located inside the sleeve 5 and is coaxially arranged with the sleeve 5. The top surface of the pivot 6 is vertically and fixedly connected to the upper hinge plate 4, while its bottom surface extends out of the sleeve 5.

[0024] The sleeve 5 has a first through hole and a second through hole on its wall, and the rotating shaft 6 has a third through hole. All three through holes are arranged coaxially along the radial direction of the sleeve 5. The pin 1 passes through the first through hole, the third through hole, and the second through hole in sequence, and is interference-fitted with the three through holes. During the installation of the pin 1, the first bushing 2 is rotatably fitted onto the section of the pin 1 located between the first through hole and the third through hole, and the second bushing 3 is rotatably fitted onto the section of the pin 1 located between the second through hole and the third through hole.

[0025] Furthermore, the inner wall of the sleeve 5 is provided with two limiting protrusions 7 arranged along the length of the sleeve 5, wherein the first through hole passes through one limiting protrusion and the second through hole passes through the other limiting protrusion.

[0026] like Figure 3 As shown, the lower hinge consists of a lower hinge plate 8 and a sliding seat, forming an integral structure manufactured using a casting process. The lower hinge plate 8 has a fourth through hole 9. The sliding seat includes two sliding parts arranged circumferentially along the fourth through hole and connected end-to-end. Each sliding part consists of a first support body 10, a second support body 11, a first stop body 12, and a second stop body 13. The top surface of the first support body 10 is a helical surface with a height difference of 6-8 mm from bottom to top, preferably 8 mm in this embodiment. The top surface of the second support body 11 is a flat surface, smoothly connected to the higher end of the helical surface on the first support body 10. The first stop body 12 is located on the flat surface of the top surface of the second support body 11, and the second stop body 13 is located outside the second support body 11, with the tops of the first stop body 12 and the second stop body 13 flush.

[0027] Furthermore, an arc-shaped recessed groove 14 is formed at the end-to-end junction of the two sliding parts, that is, two arc-shaped recessed grooves are formed.

[0028] The upper hinge is fixedly connected to the door body via the upper hinge plate 4, and the lower hinge is fixedly connected to the cabinet body via the lower hinge plate 8. The bottom end of the pivot 6 passes through the fourth through hole 9 and is clearance-fitted with the fourth through hole 9. When the door is closed, the first bushing 2 is located in an arc-shaped recessed groove 14, and the second bushing 3 is located in another arc-shaped recessed groove 14. At this time, the sliding seat is located in the sleeve 5, as shown below. Figure 4 As shown. During the opening of the door, that is, when the upper hinge is rotated, the first bushing 2 and the second bushing 3 can slide upward along the inclined spiral surface on the corresponding sliding part to the plane. As the door continues to rotate, the first bushing 2 and the second bushing 3 can contact the corresponding first stop 12. At the same time, the two limiting protrusions 7 can contact the corresponding second stop 13. At this time, the door has been opened to the maximum angle.

[0029] In this embodiment, the pin is interference-fitted with and supported by three through holes. Pin 1 and the upper hinge jointly bear the weight of the door, greatly improving the load-bearing strength of the door and extending the service life of the hinge. The upper hinge is a one-piece structure, which further improves the load-bearing strength of the door and ensures good synchronization and no abnormal noise during door rotation. In addition, the height difference of the inclined spiral surface is limited to 8mm, ensuring smooth door return and a good user experience.

[0030] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A gravity-return hinge device, characterized by It includes an upper hinge, a pin, a first bushing, a second bushing, and a lower hinge. The upper hinge is an integral structure consisting of an upper hinge plate, a sleeve, and a rotating shaft. The bottom surface of the upper hinge plate is vertically and fixedly connected to the top surface of the sleeve. The rotating shaft is located inside the sleeve and is arranged coaxially with the sleeve. The top surface of the rotating shaft is vertically and fixedly connected to the upper hinge plate, and the bottom end extends out of the sleeve. The sleeve wall is provided with a first through hole and a second through hole, and the rotating shaft is provided with a third through hole. The three through holes are arranged coaxially. The pin passes through the first through hole, the third through hole, and the second through hole in sequence and is interference-fitted with the three through holes. The first bushing is rotatably fitted on the section of the pin located between the first through hole and the third through hole. The second bushing is rotatably fitted on the section of the pin located between the second through hole and the third through hole. The lower hinge is an integral structure consisting of a lower hinge plate and a sliding seat. The lower hinge plate is provided with a fourth through hole. The sliding seat includes two sliding parts arranged circumferentially along the fourth through hole and connected end to end. Each sliding part consists of a first support body, a second support body, and a first stop body. The top surface of the first support body is a helical surface, and the top surface of the second support body is a plane. The plane is smoothly connected to the higher end of the helical surface. The first stop body is located on the plane of the top surface of the second support body. The bottom end of the shaft passes through the fourth through hole and is fitted with the fourth through hole with a clearance. The two bushings and the two sliding parts correspond one to one. When the upper hinge is rotated, the first bushing and the second bushing can slide upward along the inclined spiral surface on the corresponding sliding part to the plane, and can be blocked and limited by the first stop body.

2. A gravity-return hinge device according to claim 1, wherein The sliding part also includes a second stop, which is located outside the second support body, and the tops of the first stop and the second stop are flush.

3. A gravity-return hinge device according to claim 2, wherein The inner wall of the sleeve is provided with two limiting protrusions, which correspond one-to-one with the second stop bodies on the two sliding parts. When the upper hinge is rotated, the limiting protrusions can abut against the corresponding second stop bodies.

4. A gravity-return hinge device according to claim 1, wherein An arc-shaped groove is formed at the point where the two sliding parts meet end to end.

5. The gravity-return hinge device according to claim 1, characterized in that, The height difference between the bottom and top of the first support is 8-10mm.

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