Door hinges and refrigeration equipment

Abstract

This utility model provides a door hinge and a refrigeration device, which are disposed between a cabinet and a door so that the door can be opened and closed to cover the cabinet. The door hinge has an open state and a closed state. When the door hinge is in the closed state, the axis of the third connecting shaft is located on the side of the partition plane away from the door, so that the torque applied by the elastic structure to the third connecting shaft can assist the door to close and fit against the cabinet, thereby improving the sealing performance of the refrigeration device. When the door hinge is in the open state, the axis of the third connecting shaft is located on the side of the partition plane closer to the door, so that the torque applied by the elastic structure to the third connecting shaft can assist the door to open, prevent the door from closing accidentally, and facilitate the user to retrieve and place items.

Description

Technical Field

[0001] This utility model relates to the field of refrigeration technology, and in particular to a door hinge and refrigeration equipment. Background Technology

[0002] The refrigeration equipment includes a cabinet, door hinges, and a door. A refrigeration compartment is formed inside the cabinet. The refrigeration compartment is used to store items. The door hinges are mounted on the cabinet and connected to the door, allowing the door to be opened and closed over the cabinet, thus enabling the refrigeration compartment to be opened and closed.

[0003] In related technologies, a hinge spring is installed inside the door hinge. The hinge spring can apply an elastic force to the door to keep the door in the open position, thereby facilitating the user to take or put away items.

[0004] However, when the door is closed, the hinges still exert an elastic force on the door, causing a gap between the door and the cabinet, which affects the sealing performance of the refrigeration equipment. Utility Model Content

[0005] The purpose of this application is to provide a door hinge and a refrigeration device that can keep the door open when it is open and close when it is closed, thereby avoiding gaps between the door and the cabinet and ensuring the sealing performance of the refrigeration device.

[0006] To solve the above-mentioned technical problems, this application adopts the following technical solution: According to one aspect of this application, a door hinge is provided, disposed between a cabinet and a door, so that the door can be opened and closed to cover the cabinet. The door hinge includes: a first body, a second body, and an elastic structure; the first body is used to connect to the cabinet; the second body is used to connect to the door, and the second body is rotatably connected to the first body, with a first connecting shaft formed at the rotatable connection between the second body and the first body; one end of the elastic structure is rotatably connected to the first body, and the other end is rotatably connected to the second body, and the elastic structure is capable of elastically extending and retracting along its own length; the rotatable connection between the elastic structure and the first body forms a second connecting shaft, which is located on the side of the first connecting shaft closer to the cabinet; the rotatable connection between the elastic structure and the second body forms a third connecting shaft, which is located on the side of the first connecting shaft closer to the cabinet. The third connecting shaft is located near the second connecting shaft; the axes of the third connecting shaft, the second connecting shaft, and the first connecting shaft are parallel and spaced apart; the axis of the second connecting shaft and the axis of the first connecting shaft form a dividing plane; wherein, the elastic structure can apply elastic pressure to the third connecting shaft; the third connecting shaft can rotate around the first connecting shaft following the second body; the door hinge has an open state and a closed state; when the door hinge is in the closed state, the axis of the third connecting shaft is located on the side of the dividing plane away from the door body, so that the torque applied by the elastic structure to the third connecting shaft can assist the door body to close and fit against the cabinet body; when the door hinge is in the open state, the axis of the third connecting shaft is located on the side of the dividing plane closer to the door body, so that the torque applied by the elastic structure to the third connecting shaft can assist the door body to open.

[0007] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: When the door hinge is in the open position, the third connecting shaft is located on the side of the partition plane closer to the door body, so that the torque applied by the elastic structure to the third connecting shaft can help the door body stay open, prevent the door body from closing accidentally, and make it convenient for users to take and put items.

[0008] When the door hinge is closed, the third connecting shaft is located on the side of the partition plane away from the door body, so that the torque applied by the elastic structure to the second body can assist the door body in closing and fitting against the cabinet body, avoiding gaps when the door body closes onto the cabinet body, and ensuring the airtightness of the refrigeration equipment.

[0009] In this embodiment, the elastic structure includes: a first connecting member, a limiting rod, and an elastic element; the first connecting member is rotatably connected to a second connecting shaft, and a through hole is provided on the first connecting member; one end of the limiting rod is movably inserted into the through hole, and the other end is rotatably connected to a third connecting shaft; the elastic element is sleeved on the limiting rod, one end of the elastic element is pressed against the first connecting member, and the other end of the elastic element is limited to the limiting rod.

[0010] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: When one end of the limiting rod rotates around the first connecting shaft along with the second body, the limiting rod rotates relative to the second connecting shaft, and the length of the limiting rod between the second and third connecting shafts changes accordingly. Furthermore, the elastic element extends and retracts to apply different compressive forces to the limiting rod, allowing the elastic structure to continuously press against the second and third connecting shafts, thereby ensuring the door hinge switches between open and closed states and improving the stability and reliability of the door hinge.

[0011] In this embodiment, the outer periphery of the limiting rod is provided with a threaded portion, which extends along the length direction of the limiting rod; the elastic structure also includes an adjusting nut; the adjusting nut is provided corresponding to the threaded portion, the adjusting nut is threadedly connected to the threaded portion, and the end of the elastic element away from the first connecting member abuts against the adjusting nut.

[0012] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: Users can adjust the elastic pressure applied by the elastic element to the limit rod by adjusting the adjusting nut, thereby adjusting the torque applied by the elastic structure to the second body, so that the door hinge can be used for various door sizes, ensuring the versatility and reliability of the door hinge.

[0013] In this embodiment, a receiving groove is recessed at one end of the limiting rod near the third connecting shaft. The receiving groove can accommodate at least part of the third connecting shaft so that the elastic structure can rotate relative to the third connecting shaft.

[0014] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: The receiving groove can accommodate at least part of the third connecting shaft so that the elastic structure can rotate relative to the third connecting shaft, thereby facilitating the installation and removal of the elastic structure from the second body and improving the assembly efficiency and disassembly and maintenance efficiency of the door hinge.

[0015] In this embodiment, the elastic structure further includes: a second connector; the second connector is located between the limiting rod and the third connecting shaft, the second connector is arc-shaped, the outer peripheral wall of the second connector is accommodated and confined in the accommodating groove, and at least a portion of the inner peripheral wall of the second connector is attached to the outer peripheral wall of the third connecting shaft.

[0016] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: The second connector is connected to the limiting rod and rotatably abuts against the outer peripheral wall of the third connecting shaft, so that the limiting rod can rotate synchronously with the second connector around the third connecting shaft, avoiding mutual wear caused by direct contact between the limiting rod and the third connecting shaft, and improving the reliability and stability of the elastic structure.

[0017] In this embodiment, the third connecting shaft is recessed with at least one clearance groove, which extends circumferentially along the third connecting shaft; the second connecting member is protruding with a limiting block relative to the clearance groove, and the limiting block is accommodated in the clearance groove; in the axial direction of the third connecting shaft, the limiting block can abut against the two side walls of the clearance groove to limit the axial movement of the second connecting member relative to the third connecting shaft.

[0018] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: The clearance groove reduces the contact area between the third connecting shaft and the second connecting piece, thereby reducing wear on both and extending the service life of the door hinge.

[0019] In this embodiment, the first body includes: two first side plates and a first connecting plate; the two first side plates are spaced apart; the first connecting plate connects the two first side plates, and the two ends of the first connecting shaft and the two ends of the second connecting shaft are respectively connected to the two first side plates; and / or, the second body includes: two second side plates and a second connecting plate; the two second side plates are spaced apart, and the two second side plates are rotatably sleeved on the first connecting shaft; the second connecting plate connects the two second side plates.

[0020] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: The arrangement of the two first side plates, the first connecting piece, the two second side plates, and the second connecting plate can improve the structural strength of the door hinge and protect the internal structure, preventing external impacts from affecting the operation of the door hinge.

[0021] In this embodiment, a friction-reducing component is provided between the second side plate and the first side plate to reduce the contact area between the second side plate and the first side plate.

[0022] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: The friction-reducing component is used to reduce the contact area between the second side plate and the first side plate, thereby reducing the friction between the second side plate and the first side plate, facilitating the relative rotation between the first body and the second body, reducing the wear caused by the relative rotation between the second body and the first body, and improving the service life of the door hinge.

[0023] In this embodiment, a guide hole is provided on the first body. The guide hole extends in an arc shape with the first connecting shaft as the center. The guide hole is located on the side of the first connecting shaft close to the second connecting shaft. The two ends of the guide hole are located on both sides of the partition plane. A portion of the third connecting shaft is accommodated in the guide hole to limit the rotation angle of the third connecting shaft around the first connecting shaft.

[0024] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: The guide hole serves two purposes: firstly, it limits the opening angle of the door, preventing it from opening too wide and affecting the opening and closing efficiency; secondly, it ensures the stable operation of the elastic structure, improving its reliability and stability.

[0025] A refrigeration device includes: a cabinet, a door hinge as described above, and a door; a first body within the door hinge is connected to the cabinet; the door is located on the upper side of the cabinet and is connected to a second body, the door and the second body being rotatable about a first connecting shaft so that the door can be opened and closed to cover the upper side of the cabinet.

[0026] As can be seen from the above technical solution, this application has at least the following advantages and positive effects: Door hinges provide torque in different directions when the door is opened and closed. When the door is closed onto the cabinet, the torque provided by the hinges helps the door close and fit against the cabinet, improving the airtightness of the refrigeration equipment. When the door is open away from the cabinet, the torque provided by the hinges helps the door stay open, preventing accidental closure and facilitating the user to retrieve items. Attached Figure Description

[0027] Figure 1 This is a structural schematic diagram of the refrigeration equipment of this application.

[0028] Figure 2 This is a structural diagram of the door hinge in the closed state.

[0029] Figure 3 This is a structural diagram of the door hinge in the open state.

[0030] Figure 4 This is a structural schematic diagram of the door hinge from one perspective of this application.

[0031] Figure 5 yes Figure 4 The diagram shows a structural schematic from another perspective.

[0032] Figure 6 yes Figure 4 The diagram shows a structural breakdown of the structure shown.

[0033] Figure 7 This is a structural schematic diagram of the first body of the door hinge in this application.

[0034] Figure 8 This is a structural schematic diagram of the second body of the door hinge in this application.

[0035] Figure 9 This is an exploded view of the elastic structure of the door hinge in this application.

[0036] Figure 10This is a structural schematic diagram of the third connecting shaft of the door hinge in this application.

[0037] The reference numerals in the attached drawings are explained as follows: 10, cabinet body; 20, door body; 30, door hinge; 400, first body; 410, first side panel; 411, guide hole; 420, first connecting plate; 421, first mounting hole; 430, clearance area; 440, friction-reducing component; 500, second body; 510, second side panel; 511, weight-reducing hole; 512, reinforcing ring; 520, second connecting plate; 521, second mounting hole; 600, elastic structure; 610. First connecting member; 611, stop plate; 6111, through hole; 6112, connecting sleeve; 612, rotating plate; 620, limiting rod; 621, threaded part; 622, receiving groove; 630, adjusting nut; 640, washer; 650, elastic element; 660, second connecting member; 661, reinforcing rib; 710, first connecting shaft; 720, second connecting shaft; 721, shaft protrusion; 730, third connecting shaft; 731, anti-slip groove; 732, clearance groove. Detailed Implementation

[0038] Typical embodiments embodying the features and advantages of this application will be described in detail in the following description. It should be understood that this application can have various variations in different embodiments, all of which do not depart from the scope of this application, and the descriptions and illustrations therein are for illustrative purposes only and not intended to limit this application.

[0039] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application 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, and therefore should not be construed as a limitation of this application. 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 indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0040] Figure 1 This is a structural schematic diagram of the refrigeration equipment of this application.

[0041] See Figure 1For ease of understanding and description, the state of the refrigeration equipment during use will be used as a reference, and the vertical direction of the refrigeration equipment will be the vertical direction in the following text.

[0042] In related technologies, refrigeration equipment includes a cabinet 10, a door hinge 30, and a door 20. An opening is provided on the upper surface of the cabinet 10 to form a refrigeration compartment within the cabinet 10. The refrigeration compartment is used to store and refrigerate / freeze items. The door hinge 30 is located on the outside of the cabinet 10 and is positioned between the cabinet 10 and the door 20. The door hinge 30 connects the cabinet 10 and the door 20 so that the door 20 can be opened and closed over the cabinet 10, allowing the opening to be opened or closed, thus facilitating the user to retrieve or store items within the refrigeration compartment.

[0043] In some embodiments, the refrigeration equipment may be a freezer, refrigerator, or preservation cabinet.

[0044] See Figure 2 and Figure 3 This application provides a door hinge 30, which can be disposed between the cabinet 10 and the door 20 to realize relative rotation between the cabinet 10 and the door 20.

[0045] Figure 2 This is a structural diagram of the door hinge in the closed state. Figure 3 This is a structural diagram of the door hinge in the open state. Figure 4 This is a structural schematic diagram of the door hinge from one perspective of this application.

[0046] See Figure 2 , Figure 3 and Figure 4 In this embodiment, the door hinge 30 may include a first body 400. The first body 400 is detachably connected to the cabinet 10 to support the door 20.

[0047] Figure 5 yes Figure 4 The diagram shows a structural schematic from another perspective. Figure 6 yes Figure 4 The diagram shows a structural breakdown of the structure shown. Figure 7 This is a structural schematic diagram of the first body of the door hinge in this application.

[0048] See Figure 5 , Figure 6 and Figure 7 In this embodiment, the first body 400 may include two first side plates 410 and a first connecting plate 420. The two first side plates 410 are spaced apart. The first connecting plate 420 connects the two first side plates 410.

[0049] In some embodiments, the first connecting plate 420 may be located outside the first side plate 410 to connect the two first side plates 410.

[0050] See Figure 5 and Figure 7 In this embodiment, the first connecting plate 420 can be attached to the cabinet 10. The first connecting plate 420 may be provided with at least one first mounting hole 421. The first connecting plate 420 can be connected to one side of the cabinet 10 through the first mounting hole 421, so that the door 20 can be connected to the door hinge 30, thereby enabling the door 20 to rotate.

[0051] In some embodiments, there may be multiple first mounting holes 421 to improve the connection strength between the door hinge 30 and the cabinet 10. In other embodiments, the first connecting plate 420 may be bolted to the cabinet 10 through the first mounting holes 421.

[0052] In some embodiments, the first mounting hole 421 may be provided on the first side plate 410. The first side plate 410 may be connected to one side of the cabinet 10 so that the door 20 can be connected to the door hinge 30, thereby enabling the door 20 to rotate.

[0053] In some embodiments, the first connecting plate 420 and the two first side plates 410 may be formed by bending a single piece of sheet material to improve the structural strength of the first body 400.

[0054] See Figure 2 , Figure 3 and Figure 5 In this embodiment, the first side plate 410 can extend vertically. The two first side plates 410 are horizontally spaced apart. The first connecting plate 420 is located on the same side of the two first side plates 410 in the horizontal direction. The vertical length of the first connecting plate 420 is less than the length of the first side plate 410. Vertically, portions of the two first side plates 410 can extend beyond the cabinet body 10 to facilitate the connection of the door body 20. Furthermore, vertically, the portions of the two first side plates 410 outside the first connecting plate 420 can form a clearance area 430. The clearance area 430 is used to avoid rotation of other structures within the door hinge 30 and the door body 20, thereby ensuring the stability and reliability of the door hinge 30.

[0055] Figure 8 This is a structural schematic diagram of the second body of the door hinge in this application.

[0056] See Figure 5 , Figure 6 and Figure 8In this embodiment, the door hinge 30 may further include a second body 500. The second body 500 is used to connect to the door body 20, and the second body 500 is rotatably connected to the first body 400. A first connecting shaft 710 is formed at the rotatable connection between the second body 500 and the first body 400.

[0057] The door 20 and the second body 500 can rotate relative to the cabinet 10 around the first connecting shaft 710 to enable the door 20 to be opened and closed, thereby enabling the retrieval and placement of items and low-temperature storage.

[0058] In some embodiments, the two ends of the first connecting shaft 710 are respectively connected to the two first side plates 410. The second body 500 can be sleeved on the first connecting shaft 710 so that the second body 500 can rotate relative to the first body 400.

[0059] In other embodiments, the first connecting shaft 710 is fixedly connected to the two first side plates 410 to improve the reliability of the first connecting shaft 710.

[0060] In other embodiments, the first connecting shaft 710 may be fixedly connected to the second body 500, and the two ends of the first connecting shaft 710 may be rotatably connected to the two first side plates 410 respectively, so that the second body 500 can rotate relative to the first body 400.

[0061] In other embodiments, the first connecting shaft 710 is rotatably connected to the first body 400 and the second body 500, so that the second body 500 can rotate relative to the first body 400 about the first connecting shaft 710.

[0062] See Figure 7 In this embodiment, the second body 500 may include two second side plates 510 and a second connecting plate 520. The two second side plates 510 are spaced apart. The two second side plates 510 are connected to the first connecting shaft 710. The second connecting plate 520 connects the two second side plates 510. The second connecting plate 520 is used to connect to the door body 20.

[0063] The two second side plates 510 and the second connecting plate 520 can reduce the weight of the second body 500 while ensuring its structural strength. Furthermore, they ensure that the door 20 can rotate around the first connecting shaft 710 via the second body 500, thereby enabling the door 20 to open and close.

[0064] See Figure 4 and Figure 5 In some embodiments, the two second side plates 510 are rotatably sleeved on the first connecting shaft 710 so that the second body 500 can rotate relative to the first body 400 about the first connecting shaft 710.

[0065] See Figure 2 and Figure 3 In this embodiment, the second body 500 is located within the avoidance area 430 in the vertical direction, so that the second body 500 can rotate within the avoidance area 430, avoiding the first connecting plate 420 from affecting the rotation of the second body 500 and ensuring the reliability of the door hinge 30.

[0066] See Figure 4 and Figure 5 In some embodiments, the two second side plates 510 can be located between the two first side plates 410, so that the second body 500 can rotate around the first connecting shaft 710 between the two first side plates 410, thereby enabling the first body 400 to protect the second body 500. Furthermore, this allows for a more compact design within the door hinge 30, improving the space utilization of the door hinge 30, reducing the overall volume of the door hinge 30, and facilitating its installation and use.

[0067] In some embodiments, the two second side plates 510 may be located on opposite sides of the two first side plates 410, so that the second body 500 is fitted onto the first body 400. The first connecting shaft 710 passes through the first body 400, and the two ends of the first connecting shaft 710 are rotatably connected to the two second side walls, which provides an alternative connection solution between the first body 400 and the second body 500.

[0068] See Figure 4 and Figure 7 In this embodiment, a friction-reducing component 440 may be provided between the second side plate 510 and the first side plate 410. The friction-reducing component 440 is used to reduce the contact area between the second side plate 510 and the first side plate 410, thereby reducing the friction between the second side plate 510 and the first side plate 410, facilitating the relative rotation between the first body 400 and the second body 500, reducing the wear caused by the relative rotation between the second body 500 and the first body 400, and improving the service life of the door hinge 30.

[0069] In some embodiments, the friction reducing member 440 may be formed by protruding the first side plate 410 or the second side plate 510 relative to the first connecting shaft 710. The friction reducing member 440 may be annular and sleeved on the first connecting shaft 710 to reduce the contact area when the first side plate 410 and the second side plate 510 rotate relative to each other, thereby reducing the friction force generated by the relative rotation of the first body 400 and the second body 500.

[0070] In some embodiments, the friction-reducing component 440 may be a thrust bearing.

[0071] In some embodiments, ball bearings (not shown) may be embedded on the opposing sides of the first side plate 410 and / or the second side plate 510 so that the ball bearings can form a friction-reducing element 440.

[0072] See Figure 6 and Figure 8 In this embodiment, the second side plate 510 can protrude a reinforcing ring 512 at the first connecting shaft 710. The reinforcing ring 512 extends axially along the first connecting shaft 710. The reinforcing ring 512 is sleeved on the outer periphery of the first connecting shaft 710 to improve the structural strength of the second side plate 510 at the first connecting shaft 710, ensuring the reliability and stability of the second body 500. In other embodiments, the reinforcing ring 512 can also be disposed at the third connecting shaft 730 to sleeve on the outer periphery of the third connecting shaft 730.

[0073] See Figure 8 In some embodiments, the second side plate 510 may be provided with weight reduction holes 511 to reduce the weight of the second body 500 while ensuring the structural strength of the second side plate 510.

[0074] See Figure 6 and Figure 8 In this embodiment, the second connecting plate 520 has at least one second mounting hole 521. The second connecting plate 520 is bolted to the door body 20 through the second mounting hole 521, so that the door body 20 and the second body 500 can rotate around the first connecting shaft 710.

[0075] In other embodiments, the second connecting plate 520 may have a plurality of second mounting holes 521 to improve the connection strength between the second body 500 and the door body 20.

[0076] Figure 9 This is an exploded view of the elastic structure of the door hinge in this application.

[0077] See Figure 4 , Figure 6 and Figure 9 In this embodiment, the door hinge 30 may include an elastic structure 600. One end of the elastic structure 600 is rotatably connected to the first body 400, and the other end is rotatably connected to the second body 500. The elastic structure 600 can apply elastic pressure to the third connecting shaft 730. When the second body 500 rotates around the first connecting shaft 710, the elastic structure 600 can elastically extend and retract along its own length to ensure the stable operation of the door hinge 30.

[0078] A second connecting shaft 720 is formed at the rotatable connection between the elastic structure 600 and the first body 400. The second connecting shaft 720 is located on the side of the first connecting shaft 710 near the cabinet 10. A third connecting shaft 730 is formed at the rotatable connection between the elastic structure 600 and the second body 500. The third connecting shaft 730 is located on the side of the first connecting shaft 710 near the second connecting shaft 720. The third connecting shaft 730 can rotate with the second body 500 around the first connecting shaft 710. The axes of the third connecting shaft 730, the second connecting shaft 720, and the first connecting shaft 710 are parallel and spaced apart. The axis of the second connecting shaft 720 and the axis of the first connecting shaft 710 form a separating plane A.

[0079] At this time, the door hinge 30 has an open state and a closed state.

[0080] When the door hinge 30 is in the closed state, the axis of the third connecting shaft 730 is located on the side of the partition plane A away from the door body 20, so that the torque F applied by the elastic structure 600 to the third connecting shaft 730 can be transmitted to the second body 500, thereby assisting the door body 20 to close and fit against the cabinet body 10.

[0081] When the door hinge 30 is in the open state, the axis of the third connecting shaft 730 is located on the side of the partition plane A closer to the door body 20, so that the torque F applied by the elastic structure 600 to the third connecting shaft 730 can be transmitted to the second body 500, thereby assisting the door body 20 to open, preventing the door body 20 from closing, and making it convenient for the user to take and put in items.

[0082] See Figure 4 and Figure 7 In this embodiment, the two ends of the second connecting shaft 720 are respectively connected to the two first side plates 410, so that the elastic structure 600 can rotate relative to the second connecting shaft 720.

[0083] In some embodiments, two axial protrusions 721 can protrude from the opposing sides of the two first side plates 410 respectively. The two axial protrusions 721 are coaxial and spaced apart, so that the two axial protrusions 721 can form a second connecting shaft 720.

[0084] In other embodiments, the two axial protrusions 721 are perforated along their own axes to reduce the weight of the first body 400 while ensuring the structural strength of the axial protrusions 721, thereby facilitating the movement and installation of the first body 400.

[0085] Figure 10 This is a structural schematic diagram of the third connecting shaft of the door hinge in this application. See Figure 6 and Figure 10In this embodiment, the two ends of the third connecting shaft 730 are respectively connected to the second side plate 510 so that the third connecting shaft 730 can rotate around the first connecting shaft 710 with the second body 500. The end of the elastic structure 600 can rotate relative to the third connecting shaft 730, so that the torque F applied by the elastic structure 600 to the third connecting shaft 730 can move relative to both sides of the dividing plane A, thereby realizing the switching of the door hinge 30 between the open state and the closed state.

[0086] When the door hinge 30 is in the closed state, the torque F applied by the elastic structure 600 to the third connecting shaft 730 is located on the side of the partition plane A away from the door body 20. After the third connecting shaft 730 bears the torque F, it transmits the torque F to the second body 500, so that the second body 500 rotates around the first connecting shaft 710. The door body 20 rotates toward the opening of the cabinet 10 and presses against the cabinet 10, thereby avoiding gaps between the cabinet 10 and the door body 20 when they are closed, and ensuring the airtightness of the refrigeration equipment.

[0087] When the door hinge 30 is in the open state, the torque F applied by the elastic structure 600 to the third connecting shaft 730 is located on the side of the partition plane A closer to the door body 20. After the third connecting shaft 730 bears the torque F, it transmits the torque F to the second body 500, so that the second body 500 rotates around the first connecting shaft 710, and the door body 20 rotates away from the opening of the door body 20, thereby keeping the door body 20 in the open state, avoiding the door body 20 from affecting the user's access to and from items due to accidental closure, and improving the safety and reliability of the refrigeration equipment during use.

[0088] See Figure 10 In some embodiments, at least one section of the third connecting shaft 730 is provided with a plurality of anti-slip grooves 731. The plurality of anti-slip grooves 731 are arranged at intervals along the circumference of the third connecting shaft 730. The anti-slip grooves 731 extend along the axial direction of the third connecting shaft 730. When the third connecting shaft 730 is assembled, the anti-slip grooves 731 can prevent the third connecting shaft 730 from falling off, realize the anti-loosening and anti-slip function, and improve the assembly efficiency of the third connecting shaft 730.

[0089] In some embodiments, the third connecting shaft 730 is fixedly connected to the second side plate 510 so as to rotate with the second side plate 510 around the first connecting shaft 710.

[0090] See Figure 2 and Figure 3In this embodiment, a guide hole 411 may be provided on the first body 400. The guide hole 411 extends in an arc shape with the first connecting shaft 710 as the center. The guide hole 411 is located on the side of the first connecting shaft 710 near the second connecting shaft 720. The two ends of the guide hole 411 are respectively located on both sides of the separating plane A. A portion of the third connecting shaft 730 is accommodated in the guide hole 411 to limit the rotation angle of the third connecting shaft 730 around the first connecting shaft 710.

[0091] The guide hole 411 serves two purposes: firstly, it limits the opening angle of the door 20, preventing the door 20 from opening at an excessive angle and affecting the opening and closing efficiency; secondly, it ensures the stable operation of the elastic structure 600, improving the reliability and stability of the elastic structure 600.

[0092] In some embodiments, the central angle of the guide hole 411 is 81.7°.

[0093] See Figure 9 In this embodiment, the elastic structure 600 may include a first connecting member 610, a limiting rod 620, and an elastic member 650. The first connecting member 610 is rotatably connected to the second connecting shaft 720, and a through hole 6111 is provided on the first connecting member 610. One end of the limiting rod 620 is movably inserted into the through hole 6111, and the other end is rotatably connected to the third connecting shaft 730. One end of the elastic member 650 is pressed against the first connecting member 610, and the other end of the elastic member 650 is limited to the limiting rod 620, so that elastic pressure can be applied to the limiting rod 620, so that the limiting rod 620 is pressed against the third connecting shaft 730.

[0094] When one end of the limiting rod 620 rotates around the first connecting shaft 710 along with the second body 500, the limiting rod 620 rotates relative to the second connecting shaft 720, and the length of the limiting rod 620 between the second connecting shaft 720 and the third connecting shaft 730 changes accordingly. Furthermore, the elastic member 650 extends and retracts to apply different compressive forces to the limiting rod 620, allowing the elastic structure 600 to continuously press against the second connecting shaft 720 and the third connecting shaft 730.

[0095] The elastic pressure applied by the elastic element 650 to the limiting rod 620 can be transmitted to the second body 500 through the third connecting shaft 730, thereby causing the second body 500 to rotate around the first connecting shaft 710. When the door hinge 30 is in the closed state, the torque F borne by the second body 500 is located on the side of the partition plane A away from the door body 20, so that the torque F can cause the door body 20 to press tightly against the cabinet body 10, avoiding gaps between the door body 20 and the cabinet body 10. When the door hinge 30 is in the open state, the torque F borne by the second body 500 is located on the side of the partition plane A closer to the door body 20, so that the torque F can cause the door body 20 to remain open, preventing the door body 20 from closing accidentally and affecting the user's access to items.

[0096] When the door hinge 30 switches from the closed state to the open state, the user applies external force to the door 20 to overcome the weight of the door 20 and the elastic pressure of the elastic element 650, causing the elastic element 650 to first contract and then extend, thereby driving the door 20 and the second body 500 to rotate around the first connecting shaft 710 away from the cabinet 10, and the door hinge 30 switches to the open state.

[0097] When the door hinge 30 switches from the open state to the closed state, the user applies external force to the door 20 to overcome the elastic pressure of the elastic element 650, causing the elastic element 650 to first contract and then extend, thereby driving the door 20 and the second body 500 to rotate around the first connecting shaft 710 closer to the cabinet 10 and finally close onto the cabinet 10, and the door hinge 30 switches to the closed state.

[0098] Whether the door hinge 30 switches from the closed state to the open state or from the open state to the closed state, the user needs to apply external force to the door 20 to overcome the elastic force of the elastic element 650, so that the elastic element 650 first contracts and then extends, thereby preventing the door 20 from opening or closing accidentally and ensuring the stability and reliability of the refrigeration equipment.

[0099] See Figure 9 In this embodiment, the first connecting member 610 can be a plate-like structure. The first connecting member 610 includes a stop plate 611 and rotating plates 612 disposed on opposite sides of the stop plate 611. The stop plate 611 has a through hole 6111. One end of the elastic member 650 can press against the stop plate 611. The rotating plates 612 are disposed relative to the shaft protrusion 721. In a plane perpendicular to the axis of the second connecting shaft 720, the two rotating plates 612 can respectively conform to the outer peripheral wall of the two shaft protrusions 721 in an arc shape, so that the stop plate 611 and the two rotating plates 612 can rotate around the shaft protrusion 721.

[0100] The stop plate 611 and the two rotating plates 612 are provided to facilitate the quick assembly and disassembly of the first connecting member 610 and the second connecting shaft 720, thereby improving the efficiency of the assembly, disassembly and maintenance of the door hinge 30. On the other hand, they can improve the structural strength of the first connecting member 610 at the through hole 6111, prevent the first connecting member 610 from being damaged due to excessive local stress, and extend the service life of the first connecting member 610.

[0101] In some embodiments, in a plane perpendicular to the axis of the second connecting shaft 720, the projected area of ​​the stop plate 611 is larger than the projected area of ​​the rotating plate 612, so as to improve the connection strength between the stop plate 611 and the rotating plate 612 and improve the load-bearing capacity of the first connecting member 610.

[0102] In some embodiments, in a plane perpendicular to the length direction of the limiting rod 620, the projected area of ​​the stop plate 611 is larger than the projected area of ​​the elastic member 650, so that the stop plate 611 can fully contact the elastic member 650, thereby increasing the contact area between the stop plate 611 and the elastic member 650. When the stop plate 611 bears the elastic force of the elastic member 650, it avoids excessive local pressure and deformation.

[0103] In some embodiments, the central angle of the contact area between the shaft protrusion 721 and the rotating plate 612 can be greater than or equal to 120° and less than or equal to 180°.

[0104] In some embodiments, the perforation 6111 is located at the center of the stop plate 611 so that the first connector 610 can bear and dissipate the elastic pressure of the elastic member 650.

[0105] See Figure 9 In this embodiment, the stop plate 611 has a connecting sleeve 6112 protruding from the through hole 6111. The connecting sleeve 6112 extends axially along the through hole 6111 so that it can be sleeved on the limiting rod 620, thereby enabling the limiting rod 620 to rotate synchronously with the first connecting member 610 around the second connecting shaft 720, ensuring the stability of the door hinge 30 operation.

[0106] In other embodiments, the first connector 610 can be a block structure. One side of the first connector 610 is recessed with an arc-shaped rotating groove, which can accommodate a portion of the second connecting shaft 720. The inner peripheral wall of the arc-shaped rotating groove can abut against the outer peripheral wall of the second connecting shaft 720. This allows the first connector 610 to rotate around the second connecting shaft 720, thereby ensuring the stable operation of the door hinge 30 and enabling the door hinge 30 to switch between open and closed states.

[0107] See Figure 9 In this embodiment, the elastic element 650 can be an elastic compression spring.

[0108] In some embodiments, the elastic element 650 may be sleeved on the limiting rod 620 so that the elastic pressure applied by the elastic element 650 to the limiting rod 620 is in the same direction as the length of the limiting rod 620, thereby facilitating the deformation of the elastic element 650 and the movement of the limiting rod 620, and ensuring the stability and reliability of the elastic structure 600.

[0109] See Figure 9 In this embodiment, one end of the limiting rod 620 is inserted into the rotating sleeve, and the other end of the limiting rod 620 is rotatably connected to the third connecting shaft 730.

[0110] In some embodiments, a limiting pin (not shown) is detachably provided at the end of the limiting rod 620 away from the third connector. The limiting pin is located on the side of the first connector 610 away from the third connector to prevent the limiting rod 620 from disengaging from the rotating sleeve.

[0111] See Figure 9 In this embodiment, the outer periphery of the limiting rod 620 may be provided with a threaded portion 621. The threaded portion 621 extends along the length direction of the limiting rod 620. The elastic structure 600 may further include an adjusting nut 630 corresponding to the threaded portion 621. The adjusting nut 630 is threadedly connected to the threaded portion 621 of the limiting rod 620, so that the end of the elastic member 650 away from the first connecting member 610 abuts against the adjusting nut 630.

[0112] Users can adjust the elastic pressure applied by the elastic element 650 to the limit rod 620 by adjusting the adjusting nut 630, thereby adjusting the torque F applied by the elastic structure 600 to the second body 500, so that the door hinge 30 can be used for various door body 20 specifications, ensuring the versatility and reliability of the door hinge 30.

[0113] In some embodiments, there may be two adjusting nuts 630. The two adjusting nuts 630 are located at the same end of the elastic member 650 and are arranged close to each other, so that when adjusting the elastic pressure of the elastic member 650, the two adjusting nuts 630 need to be adjusted synchronously, thereby improving the reliability and stability of the elastic structure 600.

[0114] See Figure 9 In this embodiment, the elastic structure 600 may further include a gasket 640. The gasket 640 is disposed between the elastic member 650 and the first connecting member 610 so that the elastic pressure of the elastic member 650 can be evenly transmitted to the first connecting member 610 through the gasket 640, and can also protect the contact surface between the first connecting member 610 and the elastic member 650, thereby improving the reliability and stability of the elastic structure 600.

[0115] In some embodiments, the gasket 640 may be fitted onto the limiting rod 620.

[0116] In some embodiments, the gasket 640 may also be disposed between the elastic member 650 and the adjusting nut 630.

[0117] See Figure 9 In this embodiment, the end of the limiting rod 620 near the third connecting shaft 730 may be recessed with a receiving groove 622. The receiving groove 622 can accommodate at least part of the third connecting shaft 730, so that the elastic structure 600 can rotate relative to the third connecting shaft 730, thereby facilitating the assembly and disassembly of the elastic structure 600 and the second body 500, and improving the assembly efficiency and disassembly and maintenance efficiency of the door hinge 30.

[0118] See Figure 9 In this embodiment, the elastic structure 600 may further include a second connector 660. The second connector 660 is located between the limiting rod 620 and the third connecting shaft 730. The second connector 660 is arc-shaped, and its outer peripheral wall is accommodated and confined within the accommodating groove 622. At least a portion of the inner peripheral wall of the second connector 660 is attached to the outer peripheral wall of the third connecting shaft 730.

[0119] The second connector 660 is connected to the limiting rod 620 and rotatably abuts against the outer peripheral wall of the third connecting shaft 730, so that the limiting rod 620 can rotate synchronously with the second connector 660 around the third connecting shaft 730, avoiding mutual wear caused by direct contact between the limiting rod 620 and the third connecting shaft 730, and improving the reliability and stability of the elastic structure 600.

[0120] In some embodiments, a plurality of reinforcing ribs 661 protrude from the outer peripheral wall of the second connector 660. The plurality of reinforcing ribs 661 are spaced apart along the axial direction of the third connecting shaft 730. On the one hand, the reinforcing ribs 661 can improve the structural strength of the second connector 660 and prevent the second connector 660 from deforming due to excessive local pressure. On the other hand, along the axial direction of the third connecting shaft 730, the reinforcing ribs 661 can reduce the sway amplitude of the limiting rod 620, ensuring the stability and reliability of the door hinge 30.

[0121] See Figure 9 and Figure 10 In this embodiment, at least one clearance groove 732 may be recessed on the third connecting shaft 730. The clearance groove 732 extends circumferentially along the third connecting shaft 730 to reduce the contact area between the third connecting shaft 730 and the second connecting member 660, thereby reducing wear on the third connecting shaft 730 and the second connecting member 660.

[0122] In some embodiments, the second connector 660 is provided with a limiting block (not shown) protruding from the relief groove 732, and the limiting block is accommodated within the relief groove 732. Along the axial direction of the third connecting shaft 730, the limiting block can abut against the two side walls of the relief groove 732 to limit the vertical movement of the second connector 660 relative to the third connecting shaft 730, thereby preventing the second connector 660 from wobbling along the axial direction of the third connecting shaft 730 and improving the stability and reliability of the elastic structure 600.

[0123] In some embodiments, the central angle of the contact area between the third connecting shaft 730 and the second connecting member 660 can be greater than or equal to 120° and less than or equal to 180°.

[0124] Another embodiment of the elastic structure 600 may be as follows: the guide hole 411 need not be provided on the first side plate 410. The first connecting member 610 can be sleeved on the second connecting shaft 720. One end of the limiting rod 620 can movably pass through the first connecting member 610 and is provided with a limiting pin thereon; the other end of the limiting rod 620 is rotatably sleeved on the third connecting shaft 730. The elastic member 650 is sleeved on the limiting rod 620, with one end abutting against the first connecting member 610 and the other end limited on the limiting rod 620, so that the elastic member 650 and the limiting pin can jointly limit the rotation angle and travel of the telescopic rod, thereby ensuring the stable and reliable operation of the elastic structure 600.

[0125] See Figure 1 and Figure 2 This application provides a door hinge 30, which can assist the door 20 in opening and closing.

[0126] When the door hinge 30 is in the closed state, the third connecting shaft 730 is located on the side of the partition plane A away from the door body 20 and at the end of the guide hole 411 away from the door body 20, so that the torque F applied by the elastic member 650 to the second body 500 through the limiting rod 620 is located on the side of the partition plane A away from the door body 20, thereby enabling the torque F borne by the second body 500 to assist the door body 20 in closing and fitting against the cabinet 10, avoiding gaps between the door body 20 and the cabinet 10.

[0127] When the door hinge 30 switches from the closed state to the open state, the user applies an external force to the door 20 away from the cabinet 10. When the door 20 is subjected to this external force, the door 20 and the second body 500 first rotate around the first connecting shaft 710, and the third connecting shaft 730 rotates toward the partition plane A to overcome the elastic force of the elastic element 650, causing the elastic element 650 to compress. Then, when the axis of the third connecting shaft 730 crosses the partition plane A, the external force on the door 20 and the elastic pressure of the elastic element 650 cause the door 20 and the second body 500 to continue rotating around the first connecting shaft 710, thereby causing the third connecting shaft 730 to rotate from one end of the guide hole 411 to the other end, and the door hinge 30 switches to the open state.

[0128] When the door hinge 30 is in the open state, the torque F applied by the elastic element 650 to the second body 500 is located on the side of the partition plane A closer to the door body 20, so that the torque F on the second body 500 can assist the door body 20 to open, thereby preventing the door body 20 from closing accidentally and avoiding affecting the user's ability to pick up and put down items.

[0129] When the door hinge 30 switches from the open state to the closed state, the user applies an external force to the door 20 near the cabinet 10. When the door 20 is subjected to this external force, the door 20 and the second body 500 first rotate around the first connecting shaft 710 under the action of the external force and their own weight, while the third connecting shaft 730 rotates toward the partition plane A to overcome the elastic force of the elastic element 650, causing the elastic element 650 to compress. Then, after the axis of the third connecting element crosses the partition plane A, the torque F exerted by the elastic element 650 on the second body 500 is located on the side of the partition plane A away from the door 20, thereby allowing the door 20 and the second body 500 to rotate around the first connecting shaft 710 under the action of their own weight and the elastic force of the elastic element 650, and ultimately allowing the door 20 to tightly cover the cabinet 10, avoiding gaps between the door 20 and the cabinet 10, and ensuring the sealing performance of the refrigeration equipment.

[0130] The above embodiments are merely illustrative examples of structures. The structures in each embodiment are not fixed combinations. In the absence of structural conflicts, the structures in multiple embodiments can be arbitrarily combined. For example, the third connecting shaft 730 can also be formed by combining two axial protrusions 721.

[0131] See Figure 1 This application also provides a refrigeration device, comprising: a cabinet 10, a door 20, and a door hinge 30 as described above. A first body 400 is connected to the cabinet 10 via a first mounting hole 421. A second body 500 is connected to the door 20 via a second mounting hole 521. The door 20 and the second body 500 are rotatable about a first connecting shaft 710, so that the door 20 can be opened and closed to cover the upper side of the cabinet 10.

[0132] See Figure 1 In some embodiments, the refrigeration equipment may include multiple door hinges 30. The multiple door hinges 30 may be located on the same side of the cabinet 10, such that the first connecting shafts 710 of the multiple door hinges 30 are coaxially arranged. The first bodies 400 of the multiple door hinges 30 are connected to the same side wall of the cabinet 10, and the second bodies 500 of the multiple door hinges 30 are connected to the same side wall of the door 20, so that the door 20 can rotate around the multiple first connecting shafts 710, thereby improving the structural strength of the refrigeration equipment and ensuring its reliability and stability.

[0133] In some embodiments, the refrigeration device may include two door hinges 30. The two door hinges 30 may be respectively disposed on opposite sides of the cabinet 10, and the two door hinges 30 are coaxially arranged. The first body 400 of the two door hinges 30 may be connected to the opposite sides of the cabinet 10, and the second body 500 of the two door hinges 30 may be connected to the opposite sides of the door 20, thereby enabling the door 20 to rotate relative to the cabinet 10 about the two first connecting shafts 710.

[0134] See Figure 1 , Figure 2 and Figure 3 In some embodiments, the partition plane A can be tilted in a plane perpendicular to the first connecting shaft 710 so that the angle between the partition plane A and the vertical is an acute angle, thereby facilitating the door 20 to remain open.

[0135] In other embodiments, the angle between the separating plane A and the vertical can be less than 15°.

[0136] In some embodiments, the partition plane A may be vertically arranged in a plane perpendicular to the first connecting axis 710.

[0137] In some embodiments, in a plane perpendicular to the first connecting shaft 710, a portion of the second body 500 extends beyond the first body 400, so that the second connecting plate 520 is located on the side of the first connecting plate 420 away from the first connecting shaft 710, thereby facilitating the opening and closing of the door 20 and ensuring the reliability and stability of the refrigeration equipment.

[0138] Although this application has been described with reference to several typical embodiments, it should be understood that the terminology used is illustrative and exemplary, and not restrictive. Since this application can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A door hinge, characterized in that, It is positioned between the cabinet body and the door body so that the door body can be opened and closed to cover the cabinet body; the door hinge includes: A first body, which is used to connect the cabinet; The second body is used to connect the door body. The second body is rotatably connected to the first body, and a first connecting shaft is formed at the rotatable connection between the second body and the first body. An elastic structure is provided, with one end rotatably connected to the first body and the other end rotatably connected to the second body. The elastic structure is capable of elastically expanding and contracting along its length. A second connecting shaft is formed at the rotatable connection between the elastic structure and the first body, and the second connecting shaft is located on the side of the first connecting shaft closer to the cabinet. A third connecting shaft is formed at the rotatable connection between the elastic structure and the second body, and the third connecting shaft is located on the side of the first connecting shaft closer to the second connecting shaft. The axes of the third connecting shaft, the second connecting shaft, and the first connecting shaft are parallel and spaced apart. The axis of the second connecting shaft and the axis of the first connecting shaft form a dividing plane. The elastic structure can apply elastic pressure to the third connecting shaft; the third connecting shaft can rotate around the first connecting shaft following the second body; the door hinge has an open state and a closed state. When the door hinge is in the closed state, the axis of the third connecting shaft is located on the side of the partition plane away from the door body, so that the torque applied by the elastic structure to the third connecting shaft can assist the door body to close and fit against the cabinet body; When the door hinge is in the open state, the axis of the third connecting shaft is located on the side of the partition plane closer to the door body, so that the torque applied by the elastic structure to the third connecting shaft can assist the door body in opening.

2. The door hinge according to claim 1, characterized in that, The elastic structure includes: A first connector is rotatably connected to the second connecting shaft, and a through hole is provided on the first connector; A limiting rod, one end of which is movably inserted into the through hole, and the other end of which is rotatably connected to the third connecting shaft; An elastic element is sleeved on the limiting rod, one end of the elastic element is pressed against the first connecting member, and the other end of the elastic element is limited to the limiting rod.

3. The door hinge according to claim 2, characterized in that, The outer periphery of the limiting rod is provided with a threaded portion, which extends along the length direction of the limiting rod. The elastic structure further includes: An adjusting nut is provided corresponding to the threaded portion, the adjusting nut is threadedly connected to the threaded portion, and the end of the elastic member away from the first connecting member abuts against the adjusting nut.

4. The door hinge according to claim 2, characterized in that, The limiting rod has a recessed receiving groove at one end near the third connecting shaft. The receiving groove can accommodate at least part of the third connecting shaft so that the elastic structure can rotate relative to the third connecting shaft.

5. The door hinge according to claim 4, characterized in that, The elastic structure further includes: The second connector is located between the limiting rod and the third connecting shaft. The second connector is arc-shaped. The outer peripheral wall of the second connector is accommodated and confined within the accommodating groove. At least a portion of the inner peripheral wall of the second connector is attached to the outer peripheral wall of the third connecting shaft.

6. The door hinge according to claim 5, characterized in that, The third connecting shaft is recessed with at least one clearance groove, which extends circumferentially along the third connecting shaft. The second connector has a limiting block protruding from the clearance groove, and the limiting block is accommodated in the clearance groove; in the axial direction of the third connecting shaft, the limiting block can abut against the two side walls of the clearance groove to limit the axial movement of the second connector relative to the third connecting shaft.

7. The door hinge according to claim 1, characterized in that, The first body includes: Two first side panels are spaced apart; A first connecting plate connects the two first side plates, and the two ends of the first connecting shaft and the two ends of the second connecting shaft are respectively connected to the two first side plates; The second entity includes: Two second side plates are spaced apart and are rotatably sleeved on the first connecting shaft; The second connecting plate connects the two second side plates.

8. The door hinge according to claim 7, characterized in that, A friction-reducing component is provided between the second side plate and the first side plate to reduce the contact area between the second side plate and the first side plate.

9. The door hinge according to claim 1, characterized in that, The first body has a guide hole, which extends in an arc shape with the first connecting shaft as the center. The guide hole is located on the side of the first connecting shaft closer to the second connecting shaft. The two ends of the guide hole are respectively located on both sides of the partition plane. A portion of the third connecting shaft is housed within the guide hole to limit the rotation angle of the third connecting shaft about the first connecting shaft.

10. A refrigeration device, characterized in that, include: Cabinet; The door hinge as described in any one of claims 1 to 9, wherein the first body therein is connected to the cabinet body; A door is located on the upper side of the cabinet. The door is connected to the second body. The door and the second body are rotatable about the first connecting shaft so that the door can be opened and closed to cover the upper side of the cabinet.

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