Refrigerator lower hinge structure and refrigerator

Abstract

The utility model discloses a refrigerator lower hinge structure and refrigerator, wherein the refrigerator includes box, door body and lower hinge, and the lower hinge includes lower hinge seat and lower hinge shaft, and the lower hinge seat is installed on the lower surface of box and door body simultaneously, and the lower hinge shaft is installed on the lower surface of door body after passing through the lower hinge seat, and a plurality of screw holes are formed on the position of the lower hinge seat and below the box, the inner surface of screw hole is formed with helical groove, and the fastening screw is installed in the screw hole to install the lower hinge seat on the box. The utility model fundamentally solves the fatigue fracture problem of refrigerator hinge caused by stress concentration. Through the helical groove structure guiding stress flow redistribution and gradual release, it is expected that the maximum stress concentration coefficient can be reduced by more than 40%, and the product reliability and service life are greatly improved.

Description

Technical fields:

[0001] This utility model relates to a refrigerator lower hinge structure and a refrigerator, belonging to the technical field of refrigerator door connection structure. Background technology:

[0002] The lower hinge is a crucial supporting structural component in refrigerators, comprising the lower hinge seat and lower hinge shaft. It's an installation part of the refrigerator door, serving as the force-bearing, limiting, and supporting element for the door's opening and closing. Its structural strength directly affects the assembly effect of the refrigerator door and the overall sealing reliability of the refrigerator. In existing refrigerator products, lower hinges can be categorized into two types based on their installation location: bottom-mounted and front-mounted. They are secured to the refrigerator body using bolts. In existing products, stress concentration occurs around the hinge bolts, making them prone to early fatigue cracking.

[0003] Therefore, it is indeed necessary to improve existing technologies to address their shortcomings. Utility Model Content:

[0004] This utility model provides a refrigerator lower hinge structure and a refrigerator to solve the problems existing in the prior art.

[0005] This utility model adopts the following technical solution: a refrigerator lower hinge structure, the refrigerator including a cabinet, a door and a lower hinge, the lower hinge including a lower hinge seat and a lower hinge shaft, the lower hinge seat being installed on the lower surfaces of both the cabinet and the door, the lower hinge shaft passing through the lower hinge seat and then installed on the lower surface of the door, a plurality of screw holes being formed on the lower hinge seat at a position below the cabinet, a spiral groove being formed on the inner surface of the screw holes, and fastening screws being installed in the screw holes to install the lower hinge seat onto the cabinet.

[0006] Furthermore, the spiral groove is a spiral groove with a constant pitch, and the pitch value is 1.2±0.2mm.

[0007] Furthermore, the number of spiral grooves is three turns.

[0008] Furthermore, the groove width W of the spiral groove is 0.5±0.1mm.

[0009] Furthermore, the groove depth D of the spiral groove is 0.3±0.05mm.

[0010] Furthermore, the starting angle θ of the spiral groove is 45°.

[0011] Furthermore, the spiral groove terminates within a range of 5mm-8mm from the free end of the lower hinge seat.

[0012] The present invention also adopts the following technical solution: a refrigerator, including the refrigerator lower hinge structure described in any one of the preceding claims.

[0013] This utility model has the following beneficial effects:

[0014] (1) The spiral groove structure provided by this utility model has achieved the following significant progress by systematically and collaboratively designing the pitch, number of turns, groove width and groove depth;

[0015] (2) This utility model fundamentally solves the problem of fatigue fracture caused by stress concentration in refrigerator hinges. By guiding the redistribution and gradual release of stress flow through the spiral groove structure, it is expected to reduce the maximum stress concentration factor by more than 40%, significantly improving product reliability and service life;

[0016] (3) This utility model achieves an optimal balance between high strength and lightweight. While ensuring load-bearing strength, the structure optimizes material utilization, providing an effective path for energy conservation, cost reduction, and efficiency control in home appliances.

[0017] (4) This utility model ensures excellent processability and mass production. All parameters are set based on the current mature stamping process. Without the need for additional production equipment and costs, it can achieve stable and efficient quality output and has extremely high industrialization value. Attached image description:

[0018] Figure 1 This is a schematic diagram of the refrigerator of this utility model.

[0019] Figure 2 This is a schematic diagram of the lower hinge seat.

[0020] Figure 3 for Figure 2 A cross-sectional view along line AA.

[0021] Figure 4 for Figure 3 Enlarged diagram of B in the diagram. Detailed implementation method:

[0022] The present invention will be further described below with reference to the accompanying drawings.

[0023] The present invention relates to a refrigerator lower hinge structure, wherein the refrigerator includes a cabinet 1, a door 2 and a lower hinge, the lower hinge includes a lower hinge seat 3 and a lower hinge shaft 5, the lower hinge seat 3 is installed on the lower surfaces of both the cabinet 1 and the door 2, and the lower hinge shaft 5 passes through the lower hinge seat 3 and is installed on the lower surface of the door 2.

[0024] Three screw holes 4 are formed on the lower hinge seat 3 at a position below the housing 1, and spiral grooves 40 are formed on the inner surface of the screw holes 4. Fastening screws 6 are installed in the screw holes 4, thereby installing the lower hinge seat 3 onto the housing 1.

[0025] The spiral groove 40 is a spiral groove with a constant pitch, and its pitch P is optimized to 1.2±0.2mm. This specific pitch value ensures that the lower hinge can achieve uniform stress distribution along the groove when bearing the door load, effectively avoiding secondary stress concentration that may be caused by pitch changes. This achieves optimal stress release while maintaining structural manufacturability. The spiral groove has three turns. This specific number of turns ensures that the stress release path has sufficient length, allowing for sufficient stress dissipation. Simultaneously, the three-turn structure maximizes the preservation of the hinge's structural integrity while ensuring optimal stress release, avoiding strength reduction due to too many turns or insufficient stress release due to too few turns. This achieves an optimal balance between reliability, manufacturability, and functionality. The groove width W of the spiral groove 40 is 0.5±0.1mm. This specific width ensures that the spiral groove has sufficient width to effectively guide stress flow, avoiding processing difficulties and stress concentration caused by excessively narrow groove widths; it also maximizes the load-bearing cross-sectional area of ​​the hinge, preventing weakening of the overall structural strength due to excessively wide grooves. The groove depth D of the spiral groove 40 is 0.3±0.05mm. This depth is sufficient to guide the surface stress to extend and be effectively released, preventing it from becoming merely a decorative structure due to excessive depth. Simultaneously, this depth effectively prevents a significant decrease in the flexural section modulus and the risk of fatigue fracture caused by excessive groove depth. The starting angle θ of the spiral groove 40 is 45°. This angle ensures a smooth transition between the starting end of the spiral groove 40 at the hinge root and the principal stress direction, achieving seamless force flow guidance and fundamentally avoiding the generation of stress singularities at the end. The spiral groove 40 terminates within a range of 5mm-8mm from the free end of the lower hinge seat 3 to avoid stress concentration at the end and ensure sufficient structural strength.

[0026] In the refrigerator lower hinge structure of this utility model, the groove depth D of the spiral groove 40 and the thickness H (H = 4.0 mm) of the lower hinge seat 3 form a first ratio relationship (D / H ≈ 1:13). This ratio ensures that while releasing surface stress, the effective section modulus of the core load-bearing area is preserved. The groove width W of the spiral groove 40 and the pitch P of the spiral groove form a second ratio relationship (W / P ≈ 5:12). This ratio optimizes the stress flow cross-section and avoids flow obstruction caused by an excessively narrow groove or strength loss caused by an excessively wide groove.

[0027] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several improvements can be made without departing from the principle of the present utility model, and these improvements should also be considered within the protection scope of the present utility model.

Claims

1. A refrigerator lower hinge structure, characterized in that: The refrigerator includes a cabinet (1), a door (2) and a lower hinge. The lower hinge includes a lower hinge seat (3) and a lower hinge shaft (5). The lower hinge seat (3) is installed on the lower surfaces of both the cabinet (1) and the door (2). The lower hinge shaft (5) passes through the lower hinge seat (3) and is installed on the lower surface of the door (2). Several screw holes (4) are formed on the lower hinge seat (3) and below the cabinet (1). A spiral groove (40) is formed on the inner surface of the screw holes (4). Fastening screws (6) are installed in the screw holes (4) to install the lower hinge seat (3) onto the cabinet (1).

2. The refrigerator lower hinge structure as described in claim 1, characterized in that: The spiral groove (40) is a spiral groove with equal pitch, and its pitch is 1.2±0.2mm.

3. The refrigerator lower hinge structure as described in claim 2, characterized in that: The spiral groove (40) has three turns.

4. The refrigerator lower hinge structure as described in claim 3, characterized in that: The groove width W of the spiral groove (40) is 0.5±0.1mm.

5. The refrigerator lower hinge structure as described in claim 4, characterized in that: The groove depth D of the spiral groove (40) is 0.3±0.05mm.

6. The refrigerator lower hinge structure as described in claim 5, characterized in that: The starting angle θ of the spiral groove (40) is 45°.

7. The refrigerator lower hinge structure as described in claim 6, characterized in that: The spiral groove (40) terminates within a range of 5mm-8mm from the free end of the lower hinge seat (3).

8. A refrigerator, characterized in that: Includes the refrigerator lower hinge structure as described in any one of claims 1-7.

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