Lower hinge and refrigeration equipment

By introducing an adjustment component into the lower hinge of the refrigerator, the position of the adjustment rollers can be adjusted inside the cabinet, solving the problem of cumbersome adjustment when the floor of the built-in refrigerator is uneven, and improving the convenience of adjustment.

CN121630168APending Publication Date: 2026-03-10QINDAO HAIER REFRIGERATOR CO LTD +1
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Patent Information

Application Number
CN202411252750.8
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-06
Publication Date
2026-03-10

AI Technical Summary

Technical Problem

When installing a built-in refrigerator, if the ground is uneven, adjusting the refrigerator to be flush with the cabinet is cumbersome and requires pulling the refrigerator out of the cabinet for adjustment.

Method used

Design a lower hinge, including a hinge plate, rollers and a connecting frame. The position of the rollers can be adjusted in the vertical direction by adjusting the components, so that the angle of the refrigerator can be adjusted inside the cabinet. The lower hinge is located on the front side of the refrigeration equipment, so that it can be adjusted directly inside the cabinet.

Benefits of technology

It simplifies the process of adjusting the refrigerator to be flush with the cabinet, avoiding the need to pull the refrigerator out of the cabinet for adjustment, thus improving the convenience and efficiency of adjustment.

✦ Generated by Eureka AI based on patent content.

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Abstract

The invention relates to the field of electric appliances, in particular to a lower hinge and refrigeration equipment. The lower hinge comprises a hinge plate, a roller and a connecting frame connecting the hinge plate and the roller, the roller is located below the hinge plate, the lower end of the roller exceeds the hinge plate, and the connecting frame is movably arranged relative to the hinge plate. The adjusting assembly is used for adjusting the position of the connecting frame relative to the hinge plate so that the position of the roller relative to the hinge plate can be changed in the vertical direction. When the lower hinge and the refrigeration equipment provided by the invention are used, related personnel can conveniently change the angle formed by the refrigeration equipment relative to the ground by adjusting the adjusting assembly, so that the refrigeration equipment is flush with a cabinet.
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Description

Technical Field

[0001] This invention relates to the field of electrical appliances, and more particularly to a lower hinge and a refrigeration device. Background Technology

[0002] Existing built-in refrigerators require being pushed into cabinets during installation. On uneven floors, this can result in the refrigerator and cabinet not being level. To address this, the height of the refrigerator's four corners needs to be adjusted to change its angle relative to the ground. Current refrigerators have adjustment mechanisms located at the rear, requiring the refrigerator to be pulled out of the cabinet for adjustment before being pushed back in – a cumbersome process. Summary of the Invention

[0003] The purpose of this invention is to provide a lower hinge that allows the angle of a refrigeration device relative to the ground to be adjusted when the device is inside a cabinet, and a refrigeration device including the lower hinge.

[0004] To achieve the above objectives, the present invention provides a lower hinge, including a hinge plate, a roller, and a connecting frame connecting the hinge plate and the roller. The roller is located below the hinge plate and its lower end extends beyond the hinge plate. The connecting frame is movably disposed relative to the hinge plate. The lower hinge further includes an adjustment component disposed between the hinge plate and the connecting frame. The adjustment component is used to adjust the position of the connecting frame relative to the hinge plate so that the position of the roller relative to the hinge plate changes in the vertical direction.

[0005] As a further improvement of the present invention, the connecting frame includes a frame body, a first rotating shaft rotatably connecting the frame body and the hinge plate, the axis of the roller is parallel to the axis of the first rotating shaft, and the adjusting component is used to drive the connecting frame to rotate around the axis of the first rotating shaft.

[0006] As a further improvement of the present invention, the adjusting assembly includes a dial wheel rotatably connected to the hinge plate, the axis of the dial wheel being parallel to the axis of the roller, a cam surface being formed on the outer periphery of the dial wheel, and a contact surface being formed on the connecting frame for contacting the cam surface. The cam surface and the contact surface are configured such that when the dial wheel rotates, the cam surface can drive the connecting frame to rotate about the axis of the first rotating shaft through the contact surface.

[0007] As a further improvement of the present invention, the cam surface includes a first arc segment, a transition segment, and a second arc segment arranged in sequence. The radius of the first arc segment is greater than the radius of the second arc segment. The transition segment connects the first arc segment and the second arc segment. The center of the first arc segment and the center of the second arc segment are both located on the axis of the dial.

[0008] As a further improvement of the present invention, the cam surface is an arc segment, and there is a gap between the center of the cam surface and the axis of the dial wheel.

[0009] As a further improvement of the present invention, the frame body further includes a second rotating shaft that rotatably connects the frame body and the roller, and the contact surface is formed on the outer periphery of the second rotating shaft.

[0010] As a further improvement of the present invention, the hinge plate includes a first plate body and two first flanges formed by folding down from opposite sides of the first plate body. The two first flanges are respectively located on both sides of the roller in the axial direction. At least one of the first flanges is provided with a limiting groove for limiting the range of motion of the second rotating shaft, and the second rotating shaft passes through the limiting groove.

[0011] As a further improvement of the present invention, the adjustment assembly further includes a rotation limiting structure for limiting the rotational position of the dial wheel relative to the hinge plate.

[0012] As a further improvement of the present invention, the adjustment assembly further includes a limiting member, the limiting member including a fixed part connected to the hinge plate and located on one side of the dial wheel, and a flexible part connected to the fixed part and located on the side of the fixed part close to the dial wheel, the rotation limiting structure including a first toothed part formed on the dial wheel, and a second toothed part formed on the flexible part and meshing with the first toothed part.

[0013] The present invention also provides a refrigeration device, which includes a housing, a door located on the front side of the housing, and the aforementioned lower hinge connecting the bottom surface of the housing and the door.

[0014] Beneficial effects:

[0015] In the lower hinge and refrigeration device provided by the present invention, the lower hinge is located on the front side of the refrigeration device. By adjusting the adjustment component, the position of the roller on the lower hinge relative to the hinge plate in the vertical direction can be changed, so that the front side of the refrigeration device is raised or lowered. In this way, when the refrigeration device is in the cabinet, if the ground is uneven, the relevant personnel can easily adjust the adjustment component to change the angle of the refrigeration device relative to the ground, so that the refrigeration device is flush with the cabinet. Attached Figure Description

[0016] Figure 1 This is a side view of a refrigeration device provided according to an embodiment of the present invention;

[0017] Figure 2 for Figure 1 A three-dimensional schematic diagram of the lower hinge in the middle;

[0018] Figure 3 for Figure 2 Another three-dimensional schematic diagram of the lower hinge in the middle;

[0019] Figure 4 for Figure 2 An exploded view of the lower hinge in the diagram;

[0020] Figure 5 for Figure 2 Side view of the lower hinge in the middle;

[0021] Figure 6 for Figure 5 A 3D diagram of the center derailleur;

[0022] Figure 7 for Figure 5 A side view of the lower hinge portion of the structure in one state;

[0023] Figure 8 for Figure 5 The lower hinge portion of the structure is shown in a side view in another state.

[0024] In the picture:

[0025] 100. Refrigeration equipment; 110. Cabinet; 120. Door;

[0026] 10. Lower hinge;

[0027] 1. Hinge plate; 11. Hinge shaft; 12. Adjustable foot; 13. Threaded rod; 14. First plate; 15. First flange; 16. Limiting groove;

[0028] 2. Rollers;

[0029] 3. Connecting frame; 31. Frame body; 311. Second plate; 312. Second flange; 313. Reinforcing edge; 32. First pivot; 33. Contact surface; 34. Second pivot;

[0030] 4. Adjustment component; 41. Dial wheel; 42. Cam surface; 421. First arc segment; 422. Transition segment; 423. Second arc segment; 43. Rotation limit structure; 431. First toothed part; 432. Second toothed part; 44. Limiting member; 441. Fixed part; 442. Flexible part; 443. Groove. Detailed Implementation

[0031] The present invention will now be described in detail with reference to the embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any modifications to the mechanism, method, or function made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0032] The terms used herein, such as "up," "down," "left," "right," "front," and "back," indicating spatial relative position, are for illustrative purposes to describe the relationship of one feature relative to another, as shown in the accompanying drawings. It is understood that, depending on the product's placement, these terms may be intended to include different orientations besides those shown in the figures, and should not be construed as limiting the claims. Furthermore, the descriptive term "horizontal" used herein is not entirely equivalent to being perpendicular to the direction of gravity, and allows for a certain angle of inclination.

[0033] like Figure 1 As shown, one embodiment of the present invention provides a refrigeration device 100, which includes a housing 110, a door 120 located on the front side of the housing 110, and a lower hinge 10 connecting the bottom surface of the housing 110 and the door 120. In addition to the lower hinge 10, the refrigeration device 100 may also include an upper hinge connecting the top surface of the housing 110 and the door 120. The door 120 is rotatably connected to the housing 110 via an upper hinge and a lower hinge 10. A storage space with a forward opening is formed inside the housing 110, and the door 120 rotates to open and close the storage space. The refrigeration device 100 also includes a refrigeration system for cooling the storage compartment.

[0034] The refrigeration equipment 100 can specifically be an embedded refrigerator. Figure 1 In the illustrated embodiment, the refrigeration device 100 is a double-door refrigerator. It should be noted that the refrigeration device 100 can also be a French door refrigerator, a T-door refrigerator, etc., and is not limited here. In this text, the front-back direction refers to the direction in which the refrigeration device 100 is located. Figure 1 The left and right directions in the state shown are: the left side (the side where the door 120 is located) is the front side, the right side is the rear side, and the up and down directions can be understood as the height direction of the refrigeration equipment 100.

[0035] Continue to combine Figure 2-4 As shown, the lower hinge 10 includes a hinge plate 1, a roller 2, and a connecting frame 3 connecting the hinge plate 1 and the roller 2. The roller 2 is located below the hinge and its lower end extends beyond the hinge plate 1. The hinge plate 1 is specifically connected to the bottom surface of the cabinet 110, and the lower end of the roller 2 extends beyond the hinge plate 1, allowing it to contact the ground and roll on the ground. The lower hinge 10 provided in this embodiment can be used to connect the door 120 and the cabinet 110, enabling the door 120 to rotate relative to the cabinet 110 to open and close the storage space. On the other hand, the roller 2 also facilitates the movement of the refrigeration equipment 100.

[0036] The roller 2 and the connecting bracket 3 are specifically located on the rear side of the hinge plate 1. The lower hinge 10 also includes a hinge shaft 11 connected to the front side of the hinge plate 1 and extending upward. The hinge shaft 11 is used to insert into the door body 120 and rotate with the door body 120 so that the door body 120 can rotate relative to the housing 110. Further, the lower hinge 10 also includes an adjusting foot 12 located below the hinge plate 1 and a threaded rod 13 connecting the hinge plate 1 and the adjusting foot 12. The threaded rod 13 is connected to the hinge plate 1 and extends downward, and the adjusting foot 12 is threadedly connected to the threaded rod 13. By rotating the adjusting foot 12, the adjusting foot 12 can move up and down. When the bottom surface of the adjusting foot 12 contacts the ground, the friction between the two will keep the position of the refrigeration device 100 fixed. In this embodiment, the front part of the hinge plate 1 is tilted upward relative to the rear part to increase the range of motion of the adjusting foot 12.

[0037] The connecting frame 3 is movably mounted relative to the hinge plate 1. The lower hinge 10 also includes an adjusting component 4 located between the hinge plate 1 and the connecting frame 3. The adjusting component 4 is used to adjust the position of the connecting frame 3 relative to the hinge plate 1, so that the position of the roller 2 relative to the hinge plate 1 changes in the vertical direction. When the refrigeration unit 100 is placed on the ground, the roller 2 moves up and down, raising or lowering the front of the refrigeration unit 100. Adjusting the vertical position of the roller 2 adjusts the angle of the refrigeration unit 100 relative to the ground. When the refrigeration unit 100 is located inside a cabinet, if the ground is uneven, since the lower hinge 10 is located in front of the refrigeration unit 100, personnel can easily adjust the adjusting component 4 to move the roller 2 up and down, thereby adjusting the angle of the refrigeration unit 100 relative to the ground until the refrigeration unit 100 is flush with the cabinet. This eliminates the need to pull the refrigeration unit 100 out of the cabinet for adjustment, making it convenient and quick.

[0038] In this embodiment, the connecting frame 3 includes a frame body 31, a rotating connecting frame body 31, and a first rotating shaft 32 of the hinge plate 1. The axis of the roller 2 is parallel to the axis of the first rotating shaft 32, and the two are spaced apart. The frame body 31 can rotate around the first rotating shaft 32, the roller 2 is rotatable around its own axis, and the first rotating shaft 32 can also rotate around its own axis. The adjusting component 4 is used to drive the connecting frame 3 to rotate around the axis of the first rotating shaft 32. When the connecting frame 3 rotates around the axis of the first rotating shaft 32, the roller 2 can move around an arc-shaped trajectory under the drive of the connecting frame 3. During the movement, its position relative to the hinge plate 1 will change in the vertical direction. Thus, the adjusting component 4 plays the role of adjusting the vertical position of the roller 2.

[0039] In other embodiments, the frame body 31 may also be movably connected to the hinge plate 1 in the vertical direction, and the adjustment component 4 is used to drive the frame body 31 to move vertically relative to the hinge plate 1, thereby adjusting the vertical position of the roller 2.

[0040] Continue to combine Figure 5-8 As shown, in this embodiment, the adjustment component 4 includes a dial wheel 41 rotatably connected to the hinge plate 1, and the axis of the dial wheel 41 is parallel to the axis of the roller 2, with the two spaced apart. The axis of the dial wheel 41 should be understood as its rotation axis. A cam surface 42 is formed on the outer periphery of the dial wheel 41. Correspondingly, a contact surface 33 for contacting the cam surface 42 is formed on the connecting frame 3. The cam surface 42 and the contact surface 33 are configured such that when the dial wheel 41 rotates, the cam surface 42 can drive the connecting frame 3 to rotate around the axis of the first rotating shaft 32 through the contact surface 33. With the above configuration, the dial wheel 41 is equivalent to a cam. By manually rotating the dial wheel 41, the connecting frame 3 can be driven to rotate around the axis of the first rotating shaft 32, thereby moving the roller up and down, which is convenient to operate.

[0041] In one embodiment of the present invention, the cam surface 42 includes a first arc segment 421, a transition segment 422, and a second arc segment 423 arranged sequentially. The radius of the first arc segment 421 is larger than the radius of the second arc segment 423. The transition segment 422 connects the first arc segment 421 and the second arc segment 423, forming a smooth transition curve structure between the first arc segment 421 and the second arc segment 423. The center of the first arc segment 421 and the center of the second arc segment 423 are both located on the axis of the dial wheel 41.

[0042] Understandably, both the first arc segment 421 and the second arc segment 423 extend along a circular trajectory centered on the axis of the dial 41. That is, by selecting three different points on the extension trajectory of the first arc segment 421, a first circle A can be constructed, and the center of the first arc segment 421 is the center of the first circle A. By selecting three different points on the extension trajectory of the second arc segment 423, a second circle B can be constructed, and the center of the second arc segment 423 is the center of the second circle B. The statement that "the radius of the first arc segment 421 is greater than the radius of the second arc segment 423" means that the radius of the first circle A is greater than the radius of the second circle B.

[0043] With the above configuration, during the rotation of the dial 41, the contact portion between the cam surface 42 and the contact surface 33 is transferred from the second arc segment 423 through the transition segment 422 to the first arc segment 421, allowing the connecting frame 3 to rotate. For example... Figure 5 , 7As shown in Figure -8, on the dial 41, the first arc segment 421 is located above the second arc segment 423, and the contact surface 33 is located on the right side of the dial 41. When the dial 41 rotates clockwise, the cam surface 42 drives the contact surface 33 to rotate the connecting frame 3 counterclockwise, causing the roller 2 to move from top to bottom. When the dial 41 rotates counterclockwise, the roller 2 will move from bottom to top under the influence of the gravity of the refrigeration device 100. It is understood that some adaptive changes to the structure of the adjusting component 4 should also be considered within the scope of protection of this invention. For example, in other embodiments, the second arc segment 422 may be located above the first arc segment 421. In this case, if the roller 2 is to move from top to bottom, the dial 41 should rotate counterclockwise.

[0044] In another embodiment of the present invention, the cam surface 42 is an arc segment, that is, the cam surface 42 extends only along a circular arc, and there is a gap between the center of the cam surface 42 and the axis of the dial wheel 41. In this case, the dial wheel 41 can be regarded as an eccentric wheel. When the dial wheel 41 rotates, the cam surface 42 drives the connecting frame 3 to rotate through the contact surface 33. The center of the cam surface 42 should be understood as the center of the circle formed by selecting three different points on the extension trajectory of the cam surface 42. With the setting of this embodiment, rotating the dial wheel 41 can also drive the connecting frame 3 to rotate.

[0045] It is conceivable that the cam surface 42 can be set in a manner not limited to the two mentioned above, and other designs are also possible, as long as it can drive the connecting frame 3 to rotate through contact with the contact surface 33.

[0046] In this embodiment, the frame body 31 also includes a second rotating shaft 34 that rotatably connects the frame body 31 and the roller 2. The roller 2 can rotate relative to the second rotating shaft 34, or the roller 2 can not rotate relative to the second rotating shaft 34, while the second rotating shaft 34 can rotate relative to the frame body 31. The aforementioned contact surface 33 is formed on the outer periphery of the second rotating shaft 34, that is, the cam surface 42 specifically contacts the outer periphery of the second rotating shaft 34. When the dial wheel 41 rotates, it drives the roller 2 to move through the second rotating shaft 34.

[0047] like Figure 3-4 As shown, the hinge plate 1 includes a first plate 14 and two first flanges 15 formed by folding downwards from opposite sides of the first plate 14. The hinge plate 1 can be formed by bending sheet metal during manufacturing. The two first flanges 15 are located on both sides of the roller 2 in the axial direction. At least one first flange 15 has a limiting groove 16 for limiting the range of motion of the second rotating shaft 34, and the second rotating shaft 34 passes through the limiting groove 16. Under the restriction of the limiting groove 16, the second rotating shaft 34 can only swing within a certain angle range around the axis of the first rotating shaft 32. Thus, the adjustable range of the roller 2 in the vertical direction is also limited.

[0048] Specifically, two limiting grooves 16 are provided, which are respectively formed on the two first flanges 15. The two sides of the second rotating shaft 34 are respectively inserted into the two limiting grooves 16, and the two limiting grooves 16 can together limit the rotation range of the second rotation. The limiting grooves 16 can be arc-shaped to match the swing trajectory of the second rotating shaft 34.

[0049] The frame body 31 includes a second plate 311 and two second flanges 312 formed by folding downwards from opposite sides of the second plate 311. The frame body 31 can be formed by bending sheet metal during manufacturing. The frame body 31 also includes a reinforcing edge 313 connecting the two second flanges 312. The two sides of the first rotating shaft 32 pass through the two second flanges 312 and are connected to the two first flanges 15. The two sides of the second rotating shaft 34 pass through the two second flanges 312 and are connected to the two first flanges 15.

[0050] The dial 41 is rotatably mounted relative to the hinge plate 1. As the dial 41 rotates, its position changes. Correspondingly, the position of the roller 2 in the vertical direction differs depending on the position of the dial 41. In other words, the rotational position of the dial 41 and the vertical position of the roller 2 are correlated. The adjustment assembly 4 also includes a rotation limiting structure 43 for limiting the rotational position of the dial 41 relative to the hinge plate 1. Under the action of the rotation limiting structure 43, the dial 41 can remain at different rotational positions and cannot continue to rotate. When the dial 41 cannot rotate, the vertical position of the roller 2 relative to the hinge plate 1 is also limited.

[0051] In this embodiment, the adjustment component 4 further includes a limiting member 44, which includes a fixed portion 441 connected to the hinge plate 1 and located on one side of the dial wheel 41, and a flexible portion 442 connected to the fixed portion 441 and located on the side of the fixed portion 441 near the dial wheel 41. The flexible portion 442 can be made of flexible materials such as rubber or silicone and can undergo elastic deformation. The rotation limiting structure 43 includes a first toothed portion 431 formed on the dial wheel 41 and a second toothed portion 432 formed on the flexible portion 442 and meshing with the first toothed portion 431. When the first toothed portion 431 and the second toothed portion 432 are engaged, the dial wheel 41 will not rotate. When an operator intends to move the dial wheel 41, the elastic force of the flexible portion 442 needs to be overcome to cause the flexible portion 442 to undergo elastic deformation.

[0052] A groove 443 is formed between the fixed part 441 and the elastic part, so that the flexible part 442 is more likely to undergo elastic deformation. The fixed part 441 and the elastic part can be integrally molded, that is, both the fixed part 441 and the flexible part 442 are made of flexible materials such as rubber and silicone. The dial wheel 41 and the limiting member 44 are both connected to a first flange 15 and are located on the side of the first flange 15 away from the roller 2. One end of the second rotating shaft 34 extends through the first flange 15 that connects the dial wheel 41 and the limiting member 44, and a contact surface 33 is formed on the protruding part to cooperate with the cam surface 42 on the dial wheel 41.

[0053] Understandably, in order to enable the dial 41 to stay in different rotation positions, the rotation limiting structure 43 can also be in other forms that can be conceived by those skilled in the art. For example, the first toothed portion 431 and the second toothed portion 432 can be replaced by a first friction surface and a second friction surface that fit together tightly. When the relevant personnel think of turning the dial 41, they need to overcome the friction between the two friction surfaces.

[0054] In the lower hinge 10 and refrigeration device 100 provided by the present invention, the lower hinge 10 is located on the front side of the refrigeration device 100. By adjusting the adjustment component 4, the position of the upper roller 2 of the lower hinge 10 relative to the hinge plate 1 in the vertical direction can be changed, so that the front side of the refrigeration device is raised or lowered. In this way, when the refrigeration device 100 is in the cabinet, if the ground is uneven, the relevant personnel can easily adjust the angle of the refrigeration device 100 relative to the ground by adjusting the adjustment component 4, so that the refrigeration device 100 is flush with the cabinet.

[0055] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0056] The above embodiments are only used to illustrate the technical solutions of this application and are not intended to limit it. Although this application has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this application without departing from the spirit and scope of the technical solutions of this application.

Claims

1. A lower hinge, characterized in that, The hinge plate (1), the roller (2), the connecting frame (3) connecting the hinge plate (1) and the roller (2), the roller (2) is below the hinge plate (1) and the lower end exceeds the hinge plate (1), the connecting frame (3) is movably arranged relative to the hinge plate (1), the lower hinge (10) further comprises the adjusting assembly (4) arranged between the hinge plate (1) and the connecting frame (3), the adjusting assembly (4) is used for adjusting the position of the connecting frame (3) relative to the hinge plate (1) so that the position of the roller (2) relative to the hinge plate (1) changes in the up-down direction.

2. The lower hinge according to claim 1, characterized in that, The connecting frame (3) comprises a frame body (31), a first rotating shaft (32) for rotatingly connecting the frame body (31) and the hinge plate (1), the axis of the roller (2) is parallel to the axis of the first rotating shaft (32), and the adjusting assembly (4) is used for driving the connecting frame (3) to rotate around the axis of the first rotating shaft (32).

3. The lower hinge according to claim 2, characterized in that, The adjusting assembly (4) comprises a rotating wheel (41) rotatingly connected to the hinge plate (1), the axis of the rotating wheel (41) is parallel to the axis of the roller (2), the outer periphery of the rotating wheel (41) is formed with a cam surface (42), the connecting frame (3) is formed with a contact surface (33) for contacting the cam surface (42), and the cam surface (42) and the contact surface (33) are configured such that when the rotating wheel (41) rotates, the cam surface (42) can drive the connecting frame (3) to rotate around the axis of the first rotating shaft (32) through the contact surface (33).

4. The lower hinge of claim 3, wherein, The cam surface (42) comprises a first circular arc segment (421), a transition segment (422) and a second circular arc segment (423) arranged in sequence, the radius of the first circular arc segment (421) is greater than the radius of the second circular arc segment (423), the transition segment (422) is connected to the first circular arc segment (421) and the second circular arc segment (423), and the center of the first circular arc segment (421) and the center of the second circular arc segment (423) are located on the axis of the rotating wheel (41).

5. The lower hinge of claim 3, wherein, The cam surface (42) is a circular arc segment, and the center of the cam surface (42) is spaced from the axis of the rotating wheel (41).

6. The lower hinge of claim 3, wherein, The frame body (31) further comprises a second rotating shaft (34) for rotatingly connecting the frame body (31) and the roller (2), and the contact surface (33) is formed on the outer periphery of the second rotating shaft (34).

7. The lower hinge according to claim 6, characterized in that, The hinge plate (1) comprises a first plate body (14), two first flanges (15) respectively formed by folding downward from opposite sides of the first plate body (14), the two first flanges (15) are located on both sides of the roller (2) in the axial direction, at least one of the first flanges (15) is provided with a limiting groove (16) for limiting the movement range of the second rotating shaft (34), and the second rotating shaft (34) penetrates into the limiting groove (16).

8. The lower hinge of claim 3, wherein, The adjusting assembly (4) further comprises a rotation limiting structure (43) for limiting the rotation position of the dial wheel (41) relative to the hinge plate (1).

9. The lower hinge of claim 8, wherein, The adjusting assembly (4) further comprises a limiting piece (44), the limiting piece (44) comprises a fixed part (441) connected to the hinge plate (1) and located at one side of the dial wheel (41), a flexible part (442) connected to the fixed part (441) and located at one side of the fixed part (441) close to the dial wheel (41), the rotation limiting structure (43) comprises a first tooth-shaped part (431) formed on the dial wheel (41), a second tooth-shaped part (432) formed on the flexible part (442) and engaged with the first tooth-shaped part (431).

10. A refrigeration appliance characterized in that, The refrigerator comprises a box body (110), a door body (120) located at the front side of the box body (110), and a lower hinge (10) according to any one of claims 1-9 connecting the bottom surface of the box body (110) and the door body (120).