Door closer and refrigerator

Abstract

The utility model provides a kind of door closing device and refrigerator, wherein, door closing device includes hinge structure and door closer structure, hinge structure includes hinge seat and hinge shaft fixed on hinge seat, hinge shaft has hollow shaft section;Door closer structure includes door closer casing, door closer inner shaft and elastic part;Door closer casing is fixedly connected with door body, door closer inner shaft is located inside door closer casing, and part of door closer inner shaft is movably inserted inside hollow shaft section of hinge shaft, and elastic part is arranged between door closer inner shaft and hinge shaft;Transmission assembly is arranged on door closer casing and door closer inner shaft, when door closer inner shaft moves under the action of elastic part, transmission assembly drives door closer casing and door body to rotate around hinge shaft, to realize the closing of door body;The utility model discloses door closing device discards the traditional meshing structure design, can realize semi-automatic door closing function, effectively reduces abnormal sound in the process of opening and closing door simultaneously, significantly improves the use experience of user.

Description

Technical Field

[0001] This utility model belongs to the field of refrigerators, and more specifically, it relates to a door closing device and a refrigerator. Background Technology

[0002] With social development and the continuous improvement of people's living standards, people's functional requirements for refrigerators have gone beyond traditional storage; they also have higher expectations for the user experience of these products.

[0003] Many refrigerators currently produce a loud or soft noise when opening or closing their doors. This is due to the door closer mechanism at the bottom of the door. The noise occurs as the door closer disengages from and engages with the hinge during opening and closing. Furthermore, prolonged use can cause the door closer mechanism to malfunction, resulting in the refrigerator door not closing properly and a decrease in cooling efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a door closing device and a refrigerator to solve the problem of abnormal noise caused by the engagement of the hinge structure and the door closer structure during the opening and closing process in the prior art.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0006] This utility model provides a door closing device, including:

[0007] A hinge structure is fixedly connected to the housing. The hinge structure includes a hinge base and a hinge shaft fixed on the hinge base. The hinge shaft has a hollow shaft section.

[0008] A door closer structure includes a door closer housing, a door closer inner shaft, and an elastic element. The door closer housing is fixedly connected to the door body. The door closer inner shaft is located inside the door closer housing, and a portion of the inner shaft is movably inserted into the hollow shaft section of the hinge shaft. The elastic element is disposed between the door closer inner shaft and the hinge shaft. A transmission assembly is provided on the door closer housing and the door closer inner shaft. When the door closer inner shaft moves under the action of the elastic element, the transmission assembly drives the door closer housing and the door body to rotate around the hinge shaft, thereby closing the door.

[0009] Furthermore, the inner shaft of the door closer has an upper shaft section and a lower shaft section. The diameter of the upper shaft section of the inner shaft of the door closer is larger than the diameter of the lower shaft section of the inner shaft of the door closer. The lower shaft section of the inner shaft of the door closer is movably inserted into the hollow shaft section of the hinge shaft. The elastic element is sleeved on the lower shaft section of the inner shaft of the door closer and is located between the upper shaft section of the inner shaft of the door closer and the hollow shaft section of the hinge shaft.

[0010] Furthermore, the transmission assembly includes a guide groove located on the door closer housing, and a protrusion disposed on the upper shaft section of the inner shaft of the door closer and inserted into the guide groove.

[0011] Furthermore, an inner shaft limiting surface is provided on the lower shaft section of the inner shaft of the door closer, and a hollow shaft mating surface that mates with the inner shaft limiting surface is provided inside the hollow shaft section of the hinge shaft.

[0012] Furthermore, the door closer housing is provided with a buffer layer that can abut against the upper shaft section of the inner shaft of the door closer.

[0013] Furthermore, the bottom end of the door closer housing near the hinge seat is fixed to the end cover of the door body.

[0014] Furthermore, a mounting plate is provided at the bottom of the exterior of the door closer housing, and the mounting plate is fixedly connected to the end cover of the door body.

[0015] Furthermore, the hinge shaft also has a solid shaft section, the diameter of which is larger than ...

[0016] Furthermore, a locking washer that abuts against the bottom of the hinge seat is fitted onto the solid shaft section of the hinge shaft.

[0017] This utility model also provides a refrigerator, including a cabinet, a door, and a door closing device as described above. The door closing device connects the cabinet and the door, and the door is closable on the cabinet via the door closing device.

[0018] Compared with the prior art, the advantages of the door closing device and refrigerator provided by this utility model are as follows: the door closing device of this utility model abandons the traditional meshing structure design, can realize semi-automatic door closing function, and effectively reduces abnormal noise during the opening and closing process, significantly improving the user experience. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art 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.

[0020] Figure 1 This is a schematic diagram of the structure of the refrigerator of this utility model;

[0021] Figure 2 This utility model Figure 1Enlarged structural diagram at point A in the middle;

[0022] Figure 3 This is a cross-sectional view of the door body device and end cap assembled according to this utility model;

[0023] Figure 4 This is a side view of the disassembled door body device and end cap of this utility model;

[0024] Figure 5 This is a three-dimensional structural diagram of the disassembled door body device and end cap of this utility model;

[0025] Figure 6 This is a side view of the door device of this utility model when the door is fully closed;

[0026] Figure 7 This is a cross-sectional view of the door device of this utility model when the door is fully closed;

[0027] Figure 8 This is a side view of the door device of this utility model when the door is fully open;

[0028] Figure 9 This is a cross-sectional view of the door device of this utility model when the door is fully opened;

[0029] The main markings in the attached figures are as follows:

[0030] 1. Box body; 2. Door body; 3. Door closing device;

[0031] 21. End cap; 31. Hinge seat; 32. Hinge shaft; 33. Door closer housing; 34. Door closer inner shaft; 35. Elastic element; 36. Guide groove; 37. Protruding rod; 38. Mounting plate. Detailed Implementation

[0032] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0033] With social development and rising living standards, people's demands for refrigerators have expanded beyond traditional storage to include a superior user experience. Currently, many refrigerators produce varying degrees of noise when opening or closing the door. This noise is caused by the door closer mechanism at the bottom of the door, which engages and disengages from the hinge during opening and closing. Furthermore, prolonged use can lead to door closer failure, resulting in a loose door and reduced cooling efficiency.

[0034] Based on this, the present invention provides a door closing device and a refrigerator that can close semi-automatically without a meshing structure.

[0035] Please refer to the following: Figures 1 to 3 The door closing device 3 provided by this utility model includes a hinge structure and a door closer structure. The hinge structure is fixedly connected to the housing 1 and includes a hinge seat 31 and a hinge shaft 32 fixed on the hinge seat 31. The hinge shaft 32 has a hollow shaft section. The door closer structure includes a door closer housing 33, a door closer inner shaft 34, and an elastic element 35. The door closer housing 33 is fixedly connected to the door body 2. The door closer inner shaft 34 is located inside the door closer housing 33, and a portion of the door closer inner shaft 34 is movably inserted into the hollow shaft section of the hinge shaft 32. The elastic element 35 is disposed between the door closer inner shaft 34 and the hinge shaft 32. A transmission assembly is provided on the door closer housing 33 and the door closer inner shaft 34. When the door closer inner shaft 34 moves under the action of the elastic element 35, the transmission assembly drives the door closer housing 33 and the door body 2 to rotate around the hinge shaft 32, thereby closing the door body 2.

[0036] In use, the door closing device 3 of this invention operates as follows: When the door 2 is opened, the door 2 and the door closer housing 33 rotate around the hinge shaft 32. The transmission assembly drives the inner shaft 34 of the door closer to move downwards within the hollow section of the hinge shaft 32, compressing the elastic element 35. When the door 2 is closed, the elastic element 35 releases its stored energy, pushing the inner shaft 34 of the door closer upwards within the hollow section of the hinge shaft 32. The transmission assembly then drives the door closer housing 33 and the door 2 to rotate in opposite directions around the hinge shaft 32. This invention, through a carefully designed mechanical transmission structure, replaces the traditional meshing structure, achieving the door opening and closing function, effectively reducing friction and noise, and ensuring smooth operation and excellent quiet operation during the opening and closing process.

[0037] like Figure 3 , Figure 7 , Figure 9 As shown, the inner shaft 34 of the door closer has an upper shaft section and a lower shaft section. The diameter of the upper shaft section of the inner shaft 34 is larger than the diameter of the lower shaft section. The lower shaft section of the inner shaft 34 is movably inserted into the hollow shaft section of the hinge shaft 32. The elastic element 35 is sleeved on the lower shaft section of the inner shaft 34 and is located between the upper shaft section of the inner shaft 34 and the hollow shaft section of the hinge shaft 32.

[0038] This invention utilizes the difference in diameter between the upper and lower shaft sections of the inner shaft 34 of the door closer to ensure that the elastic element 35 can be stably fitted onto the lower shaft section. Simultaneously, the upper shaft section serves as a support point for the transmission assembly, ensuring its stable operation. Furthermore, the smaller diameter of the lower shaft section allows for smoother movement within the hollow shaft section of the hinge shaft 32, reducing frictional resistance and further improving the smoothness and quietness of the door opening and closing process. This design not only optimizes the mechanical transmission structure of the door closer 3 but also enhances its service life and reliability.

[0039] like Figure 4 As shown, the transmission assembly includes a guide groove 36 located on the door closer housing 33, and a protrusion 37 disposed on the upper shaft section of the inner shaft 34 of the door closer and inserted into the guide groove 36.

[0040] In use, when the door 2 is opened, the door 2 and the door closer housing 33 rotate around the hinge shaft 32. Since the protruding rod 37 on the inner shaft 34 of the door closer is inserted into the guide groove 36 on the door closer housing 33, the inner shaft 34 moves downward within the hollow section of the hinge shaft 32, compressing the elastic element 35. When the door 2 is closed, the elastic element 35 releases its stored energy, pushing the inner shaft 34 upward within the hollow section of the hinge shaft 32. Since the protruding rod 37 on the inner shaft 34 is inserted into the guide groove 36 on the door closer housing 33, the door closer housing 33 and the door 2 rotate in opposite directions around the hinge shaft 32. In the door closing device 3 of this invention, the transmission component uses a cooperative design of the protruding rod 37 and the guide groove 36, effectively ensuring the smoothness and accuracy of the opening and closing actions of the door 2, and also achieving a hovering function.

[0041] In addition, an inner shaft limiting surface is provided on the lower section of the inner shaft 34 of the door closer, and a hollow shaft mating surface that mates with the inner shaft limiting surface is provided inside the hollow shaft section of the hinge shaft 32. The inner shaft limiting surface and the hollow shaft mating surface are rectangular.

[0042] In the door closing device 3 of this utility model, the inner shaft limiting surface of the door closer 34 and the hollow shaft mating surface of the hinge shaft 32 are precisely matched to effectively prevent the inner shaft 34 of the door closer from rotating during the up and down movement. The inner shaft 34 of the door closer and the hinge shaft 32 are precision machined and assembled to ensure reduced friction and abnormal noise during the opening and closing of the door.

[0043] In addition, a buffer layer is provided inside the door closer housing 33, which can abut against the upper shaft section of the inner shaft 34 of the door closer. This invention can also add a buffer layer inside the door closer housing 33 to further reduce impact and noise during the opening and closing process.

[0044] like Figure 5As shown, the bottom end of the door closer housing 33 near the hinge seat 31 is fixed to the end cover 21 of the door body 2. Specifically, the door closer housing 33 is cylindrical, with an open bottom end. A square mounting plate 38 is provided at the bottom of the exterior of the door closer housing 33, and the mounting plate 38 is fixedly connected to the end cover 21 of the door body 2.

[0045] In the door closing device 3 of this utility model, by fixing the door closer housing 33 to the end cover 21 of the door body 2, the end cover 21 of the door body 2 and the door closer housing 33 move synchronously, thereby realizing rotation around the hinge axis 32 during the opening and closing process.

[0046] like Figure 3 , Figure 7 , Figure 9 The hinge shaft 32 shown also has a solid shaft section. The diameter of the hollow shaft section of the hinge shaft 32 is larger than the diameter of the solid shaft section of the hinge shaft 32, and the solid shaft section of the hinge shaft 32 passes through the hinge seat 31.

[0047] In the door closing device 3 of this utility model, the hinge shaft 32 is divided into upper and lower parts, with the upper part being a hollow shaft section and the lower part being a solid shaft section. The diameter of the hollow shaft section of the hinge shaft 32 is larger than the diameter of the solid shaft section. This design aims to achieve precise engagement between the hinge shaft 32 and the inner shaft 34 of the door closer and the hinge seat 31, while effectively preventing the hinge shaft 32 from falling off and separating from the hinge seat 31.

[0048] In addition, a locking washer is fitted onto the solid shaft section of the hinge shaft 32, which abuts against the bottom of the hinge seat 31. By adding a locking washer to the hinge shaft 32, the hinge shaft 32 is further prevented from falling off and from separating from the hinge seat 31.

[0049] Furthermore, in the hinge structure, the hinge shaft 32 and the hinge seat 31 are connected and fixed together by welding. The material of the hinge structure can be flexibly selected according to specific needs, such as stainless steel or aluminum alloy, to adapt to different environmental conditions and meet corrosion resistance requirements.

[0050] In addition, the elastic element 35 is preferably a spring. Different specifications of springs are selected according to the weight and size of the door body 2 to adapt to different application scenarios.

[0051] like Figure 1 , Figure 2 As shown, the refrigerator provided by this utility model includes a cabinet 1, a door 2, and a door closing device 3, wherein the door closing device 3 connects the cabinet 1 and the door 2, and the door 2 is installed on the cabinet 1 in an openable and closable manner through the door closing device 3.

[0052] This invention employs a low-noise door closing device 3, which enables semi-automatic door closing and effectively reduces abnormal noise during the opening and closing process, thereby improving the user experience. In other words, this invention solves the problem of serious abnormal noise generated by existing door closing devices 3 during the opening and closing process, achieving the effect of optimizing the user experience.

[0053] For ease of understanding, the structure of the door closing device 3 will now be specifically described using a preferred embodiment of the present invention as an example.

[0054] like Figures 2 to 5 As shown, the door closing device 3 includes a hinge structure composed of a hinge seat 31 and a hinge shaft 32, and a door closing structure composed of a door closer housing 33, a door closer inner shaft 34, and an elastic element 35.

[0055] The hinge seat 31 and the hinge shaft 32 are connected and fixed together by welding. The lower half of the hinge shaft 32 is a solid shaft section, and the upper half is a hollow shaft section.

[0056] The door closer housing 33 has a hollow cylindrical structure. A guide groove 36 is formed on the outer circumference of the door closer housing 33. A square mounting plate 38 is provided at the bottom of the door closer housing 33, and the door closer housing 33 is fixed to the end cap 21 (usually the lower end cap 21) of the door body 2 via the mounting plate 38. The inner shaft 34 and the elastic element 35 are both located inside the door closer housing 33. The lower half of the inner shaft 34 is the lower shaft section, and the upper half is the upper shaft section. The lower shaft section of the inner shaft 34 is movably inserted into the hollow shaft section of the hinge shaft 32. A protruding rod 37 is provided on the upper shaft section of the inner shaft 34, and the protruding rod 37 on the inner shaft 34 is inserted into the guide groove 36 on the door closer housing 33. The elastic element 35 is sleeved on the lower shaft section of the inner shaft 34 of the door closer and is located between the upper shaft section of the inner shaft 34 of the door closer and the hollow shaft section of the hinge shaft 32. The elastic element 35 can provide the power for closing the door 2. The elastic element 35 is a spring.

[0057] like Figures 6 to 9 As shown, during use, when the door 2 is fully closed, the elastic element 35 is slightly compressed, and the protrusion 37 on the inner shaft 34 of the door closer is located at the top of the guide groove 36 on the door closer housing 33. When the door 2 is fully open, the elastic element 35 is compressed to its tightest state, and the protrusion 37 on the inner shaft 34 of the door closer is located at the bottom of the guide groove 36 (the protrusion 37 is stuck in the guide groove 36). At this time, the spring is compressed to its tightest state. With just a slight force applied to close the door, the protrusion 37 on the inner shaft 34 of the door closer will extend from the guide groove 36 and move with the guide groove 36. The elastic element 35 then releases energy, the inner shaft 34 of the door closer moves upward, and the door 2 will rotate around the hinge axis 32, thereby closing the door 2.

[0058] This utility model provides a unique door closing device that can achieve semi-automatic door closing, and effectively reduces friction and abnormal noise during the closing process. It avoids the noise and abnormal noise problems caused by the meshing structure in traditional door closing devices 3, and also improves the durability and reliability of the door closer structure, extending its service life.

[0059] In the description of this utility model, it should be understood that, unless otherwise expressly specified and limited, when an element is referred to as "fixed to" or "set on" another element, it may be directly on or indirectly on the other element. When an element is referred to as "connected to" another element, it may be directly connected to or indirectly connected to the other element.

[0060] Furthermore, the terms "center," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0062] Furthermore, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0063] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A door closing device, characterized in that, include: A hinge structure is fixedly connected to the housing. The hinge structure includes a hinge base and a hinge shaft fixed on the hinge base. The hinge shaft has a hollow shaft section. A door closer structure includes a door closer housing, a door closer inner shaft, and an elastic element. The door closer housing is fixedly connected to the door body. The door closer inner shaft is located inside the door closer housing, and a portion of the inner shaft is movably inserted into the hollow shaft section of the hinge shaft. The elastic element is disposed between the door closer inner shaft and the hinge shaft. A transmission assembly is provided on the door closer housing and the door closer inner shaft. When the door closer inner shaft moves under the action of the elastic element, the transmission assembly drives the door closer housing and the door body to rotate around the hinge shaft, thereby closing the door.

2. The door closing device as described in claim 1, characterized in that, The inner shaft of the door closer has an upper shaft section and a lower shaft section. The diameter of the upper shaft section of the inner shaft is larger than the diameter of the lower shaft section. The lower shaft section of the inner shaft is movably inserted into the hollow shaft section of the hinge shaft. The elastic element is sleeved on the lower shaft section of the inner shaft and is located between the upper shaft section of the inner shaft and the hollow shaft section of the hinge shaft.

3. The door closing device as described in claim 2, characterized in that, The transmission assembly includes a guide groove located on the door closer housing, and a protrusion disposed on the upper shaft section of the inner shaft of the door closer and inserted into the guide groove.

4. The door closing device as described in claim 2, characterized in that, The lower section of the inner shaft of the door closer is provided with an inner shaft limiting surface, and the hollow shaft section of the hinge shaft is provided with a hollow shaft mating surface that mates with the inner shaft limiting surface.

5. The door closing device as described in claim 2, characterized in that, The door closer housing is provided with a buffer layer that can abut against the upper shaft section of the inner shaft of the door closer.

6. The door closing device as described in claim 1, characterized in that, The bottom end of the door closer housing, near the hinge seat, is fixed to the end cover of the door body.

7. The door closing device as described in claim 6, characterized in that, The bottom of the door closer housing is provided with a mounting plate, which is fixedly connected to the end cover of the door.

8. The door closing device as described in claim 1, characterized in that, The hinge shaft also has a solid shaft section, the diameter of which is larger than ...

9. The door closing device as described in claim 8, characterized in that, A locking washer that abuts against the bottom of the hinge seat is fitted onto the solid shaft section of the hinge shaft.

10. A refrigerator, characterized in that, It includes a housing, a door, and a closing device as described in any one of claims 1-9, wherein the closing device connects the housing and the door, and the door is closable on the housing via the closing device.

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