Free return hinge

Abstract

The utility model discloses a free return hinge, which relates to the technical field of hinges, and comprises a shaft lever, one side of the shaft lever is sleeved with a mounting rack, one end of the mounting rack is provided with an insertion hole, the mounting rack is provided with a first mounting hole on one side of the insertion hole, the shaft lever is sleeved with a first cam on one side of the mounting rack, and the first cam is provided with a second mounting hole on the other side of the mounting rack. And one side of the first cam is movably connected with the insertion hole, and a torsional spring is inserted into the first mounting hole. By adopting the structure, the first cam, the second cam, the first positioning wheel, the second positioning wheel, the mounting frame, the torsion spring, the mounting plate and the like are arranged, the torsion spring is responsible for closing the door, the first cam and the second cam generate torsion when the torsion spring closes the box door, and when the door is closed by about 20 degrees, the torsion generated by the cams is larger than the force of the torsion spring, so that the door is closed. Compared with a traditional hinge piece, the refrigerator door is not prone to loosening after being closed, cold air leakage is avoided, and the preservation effect of the refrigerator is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of hinges, and particularly relates to a free return hinge. Background Art

[0002] The connection between the refrigerator door and the refrigerator body mainly relies on the hinge, that is, the refrigerator door hinge. This hinge is an indispensable and important component in the refrigerator. It not only supports the weight of the refrigerator door, but also ensures that the door can be opened and closed smoothly.

[0003] At present, the refrigerator door is composed of two semicircular metal parts, which are connected together by a hinge pin. Although the purpose of connecting the refrigerator door to the refrigerator is achieved, the hinge connection is relatively loose, and it is easy for the refrigerator door to not be completely closed with the refrigerator, affecting the closing tightness of the refrigerator door, causing cold air to leak out, and reducing the preservation effect of the refrigerator. Utility Model Content

[0004] In view of the problems mentioned in the background technology, the purpose of the present invention is to provide a free return hinge to solve the problems in the background technology.

[0005] The above technical objectives of the utility model are achieved through the following technical solutions:

[0006] The cam is connected with a first cam on one side of the first cam and is movably connected with the first cam. The cam is connected with a first cam on the other side of the first cam and is movably connected with the first cam. The cam is connected with a first cam on the other side of the first cam and is movably connected with the first cam. The cam is connected with a first cam on the other side of the first cam. The cam is connected with a first cam on the

[0007] As a preferred technical solution, a first gasket and a second gasket are sleeved on the shaft between the second positioning wheel and the second cam, one side of the first gasket is fit connected to one side of the second positioning wheel, and one side of the second gasket is fit connected to one side of the second cam.

[0008] As a preferred technical solution, through holes are provided on both sides of the mounting frame away from the insertion hole and the first mounting hole.

[0009] As a preferred technical solution, the positioning assembly includes a positioning hole, which is opened on the inner side of the shaft rod, a positioning rod is inserted into the inner side of the positioning hole, a sliding groove is opened on the inner side of the mounting plate, the sliding groove is connected to the positioning hole, a slider is slidably connected inside the sliding groove, one end of the slider is fixedly connected to one end of the positioning rod, and a spring is fixedly connected between the slider and the sliding groove.

[0010] As a preferred technical solution, one end of the sliding block away from the spring is fixedly connected to a push block, and one side of the push block is fixedly connected to an anti-slip strip.

[0011] As a preferred technical solution, both sides of the inner side of the slide groove are provided with limit grooves, the inner side of the limit groove is slidably connected with a limit block, and one end of the limit block is fixedly connected to one end of the slide block.

[0012] In summary, the utility model mainly has the following beneficial effects:

[0013] First, the utility model provides a first cam, a second cam, a first positioning wheel, a second positioning wheel, a mounting frame, a torsion spring, a mounting plate, etc. The torsion spring is responsible for closing the door. The first cam and the second cam generate torque when the torsion spring closes the door. When the door is closed to about 20 degrees, the torque generated by the cam is greater than the force of the torsion spring. Compared with traditional hinged parts, the refrigerator door is not easy to loosen after closing, thereby avoiding leakage of cold air and improving the freshness preservation effect of the refrigerator.

[0014] Second, the utility model facilitates the removal of the torsion spring from the shaft by providing a mounting frame, a first mounting hole, a mounting plate, a second mounting hole, and a positioning assembly, thereby improving the convenience of maintaining or replacing the torsion spring, and allowing the user to perform this operation easily and efficiently. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a structural schematic diagram of the utility model;

[0016] Figure 2 This is a schematic diagram of the structure of the first cam and the second cam of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the first gasket and the second gasket of the utility model;

[0018] Figure 4 It is a schematic diagram of the internal structure of the installation plate of the utility model;

[0019] Figure 5 This utility model Figure 4 A is an enlarged structural diagram of FIG.

[0020] Figure numerals: 1, shaft; 2, torsion spring; 3, mounting frame; 31, through hole; 32, plug hole; 33, first mounting hole; 4, first cam; 5, second cam; 6, first positioning wheel; 7, second positioning wheel; 8, first gasket; 9, second gasket; 10, nut; 11, mounting plate; 12, second mounting hole; 13, positioning assembly; 131, positioning hole; 132, positioning rod; 133, slider; 134, spring; 135, slide groove; 14, limit groove; 15, limit block; 16, push block; 17, anti-slip strip. DETAILED DESCRIPTION

[0021] Example

[0022] refer to Figures 1 to 5 The free return hinge described in this embodiment includes a shaft rod 1, a mounting frame 3 is sleeved on one side of the shaft rod 1, a plug hole 32 is provided at one end of the mounting frame 3, a first mounting hole 33 is provided on the mounting frame 3 on one side of the plug hole 32, a first cam 4 is sleeved on one side of the shaft rod 1 on the mounting frame 3, one side of the first cam 4 is movably connected to the plug hole 32, a torsion spring 2 is inserted into the inside of the first mounting hole 33, the torsion spring 2 is sleeved on the shaft rod 1, and a mounting plate 11 is sleeved on one side of the torsion spring 2 on the shaft rod 1, A positioning assembly 13 is provided between the mounting plate 11 and the shaft rod 1. A second mounting hole 12 is provided on one side of the mounting plate 11. The other side of the torsion spring 2 is inserted into the second mounting hole 12. A nut 10 is threadedly connected to one side of the shaft rod 1. First positioning wheels 6 are sleeved on both sides of the mounting frame 3 on the shaft rod 1. One side of the first positioning wheel 6 is fit-connected to one side of the mounting frame 3. A second positioning wheel 7 is sleeved on the side of the shaft rod 1 away from the first positioning wheel 6. The second positioning wheel 7 is located between the nut 10 and the second cam 5.

[0023] refer to Figure 1 and Figure 3 A first gasket 8 and a second gasket 9 are sleeved on the shaft rod 1 between the second positioning wheel 7 and the second cam 5, one side of the first gasket 8 is fitted and connected to one side of the second positioning wheel 7, and one side of the second gasket 9 is fitted and connected to one side of the second cam 5; by arranging the first gasket 8 and the second gasket 9, both the first gasket 8 and the second gasket 9 are funnel-shaped structures, and two second gaskets 9 are provided to fill the possible small gap, so that the mounting frame 3 can be reliably installed on the shaft rod 1.

[0024] refer to Figure 1 Through holes 31 are provided on both sides of the mounting frame 3 away from the insertion hole 32 and the first mounting hole 33; the circular through holes 31 are provided to connect and fix the refrigerator door.

[0025] refer to Figure 3-4The positioning assembly 13 includes a positioning hole 131, which is provided on one side of the interior of the shaft 1, a positioning rod 132 is inserted into the interior of the positioning hole 131, a slide groove 135 is provided on one side of the interior of the mounting plate 11, the slide groove 135 is connected to the positioning hole 131, a slider 133 is slidably connected to the interior of the slide groove 135, one end of the slider 133 is fixedly connected to one end of the positioning rod 132, a spring 134 is fixedly connected between the slider 133 and the slide groove 135, and a push block 16 is fixedly connected to one end of the slider 133 away from the spring 134, and an anti-slip strip 17 is fixedly connected to one side of the push block 16; by setting the positioning assembly 13, the positioning rod 132 is inserted into the shaft through the mounting plate 11 The positioning rod 132 is in the positioning hole 131 of the rod 1 and is fixed to the positioning hole 131 under the action of the spring 134, so that the mounting plate 11 is fixed on the shaft rod 1 and will not slide again, thereby stabilizing the position of the mounting plate 11 and facilitating the installation of the torsion spring 2 on the shaft rod 1. Since the slider 133 can drive the spring 134 to move, the positioning rod 132 can be separated from the positioning hole 131, and the mounting plate 11 can be removed, thereby facilitating the removal of the torsion spring 2 from the mounting frame 3. By fixing the push block 16 at one end of the slider 133, it is convenient for the user to push the push block 16 to drive the slider 133 to move the positioning rod 132. A plurality of anti-slip strips 17 are fixed on the push block 16 to increase the friction resistance and facilitate the operation of the user.

[0026] refer to Figure 4 , both sides of the inner part of the slide groove 135 are provided with limiting grooves 14, and the inner part of the limiting groove 14 is slidably connected to the limiting block 15, and one end of the limiting block 15 is fixedly connected to one end of the slider 133; by providing the limiting groove 14 on the inner wall of the slide groove 135, the limiting block 15 is fixed on the slider 133, and the limiting block 15 slides in the limiting groove 14, limiting the slider 133 from driving the positioning rod 132 to move the position, so that the deformation of the spring 134 is stable, which is conducive to the stable movement of the positioning rod 132 and will not be offset.

[0027] Principle and advantages of use: The mounting frame 3 is mounted on the refrigerator and connected to the door, and the first cam 4, the second cam 5, the first positioning wheel 6, the second positioning wheel 7, the mounting frame 3, the torsion spring 2, the mounting plate 11, etc. are used. The torsion spring 2 is responsible for closing the door. The first cam 4 and the second cam 5 produce torque when the torsion spring 2 closes the door. When the door is closed to about 20 degrees, the torsion produced by the cam is greater than the force of the torsion spring 2. Compared with the traditional hinged parts, the refrigerator door is not easy to loosen after closing, which prevents the cold air from leaking out and improves the fresh-keeping effect of the refrigerator. When the torsion spring 2 needs to be maintained, the push block 16 is pressed to drive the slider 133 to move, and the slider 133 drives the positioning rod 132 to move away from the positioning hole 131 in the shaft rod 1, and one side of the torsion spring 2 is removed from the second mounting hole 12 of the mounting plate 11, and then the mounting plate 11 is removed, and then the other side of the torsion spring 2 is removed from the first mounting hole 33 of the mounting frame 3, and the torsion spring 2 can be removed from the shaft rod 1, which improves the convenience of maintaining or replacing the torsion spring 2.

Claims

1. A free return hinge, comprising a shaft (1), characterized in that: A mounting frame (3) is sleeved on one side of the shaft (1), a plug hole (32) is provided at one end of the mounting frame (3), a first mounting hole (33) is provided on the mounting frame (3) on one side of the plug hole (32), a first cam (4) is sleeved on the shaft (1) on one side of the mounting frame (3), one side of the first cam (4) is movably connected to the plug hole (32), a torsion spring (2) is inserted into the interior of the first mounting hole (33), the torsion spring (2) is sleeved on the shaft (1), a mounting plate (11) is sleeved on the shaft (1) on one side of the torsion spring (2), the mounting plate (11) and the shaft (1), a positioning assembly (13) is provided between the mounting plate (11), a second mounting hole (12) is provided on one side of the mounting plate (11), the other side of the torsion spring (2) is inserted into the second mounting hole (12), a nut (10) is threadedly connected to one side of the shaft rod (1), first positioning wheels (6) are sleeved on both sides of the shaft rod (1) located on the mounting frame (3), one side of the first positioning wheel (6) is closely connected to one side of the mounting frame (3), a second positioning wheel (7) is sleeved on the side of the shaft rod (1) away from the first positioning wheel (6), and the second positioning wheel (7) is located between the nut (10) and the second cam (5).

2. A free return hinge according to claim 1, characterized in that: A first gasket (8) and a second gasket (9) are sleeved on the shaft (1) between the second positioning wheel (7) and the second cam (5); one side of the first gasket (8) is fitted and connected to one side of the second positioning wheel (7), and one side of the second gasket (9) is fitted and connected to one side of the second cam (5).

3. The free return hinge according to claim 1, characterized in that: Through holes (31) are provided on both sides of the mounting frame (3) away from the insertion hole (32) and the first mounting hole (33).

4. The free return hinge according to claim 1, characterized in that: The positioning assembly (13) comprises a positioning hole (131), wherein the positioning hole (131) is provided on one side of the interior of the shaft rod (1), a positioning rod (132) is inserted into the interior of the positioning hole (131), a slide groove (135) is provided on one side of the interior of the mounting plate (11), the slide groove (135) is communicated with the positioning hole (131), a slider (133) is slidably connected to the interior of the slide groove (135), one end of the slider (133) is fixedly connected to one end of the positioning rod (132), and a spring (134) is fixedly connected between the slider (133) and the slide groove (135).

5. The free return hinge according to claim 4, characterized in that: One end of the sliding block (133) away from the spring (134) is fixedly connected to a push block (16), and one side of the push block (16) is fixedly connected to an anti-slip strip (17).

6. The free return hinge according to claim 4, characterized in that: Limiting grooves (14) are provided on both sides of the interior of the slide groove (135), and a limiting block (15) is slidably connected inside the limiting groove (14), and one end of the limiting block (15) is fixedly connected to one end of the sliding block (133).

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