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CN-122014083-A - Automatic door hinge, cabinet door and refrigerator

CN122014083ACN 122014083 ACN122014083 ACN 122014083ACN-122014083-A

Abstract

The invention discloses an automatic door returning hinge, a cabinet door and a refrigerator, which belong to the technical field of hinges, and comprise a base, a door returning rotating shaft, a guide post, a sliding block and an elastic piece, wherein the door returning rotating shaft is rotationally arranged on the base, a spiral guide groove is formed in the surface of the door returning rotating shaft, the guide post is arranged on the base, the sliding block is in sliding connection with the guide post, a pushing part in sliding connection with the spiral guide groove is arranged on the sliding block, the elastic piece is used for pushing the sliding block to slide in a direction away from the elastic piece, when the door returning rotating shaft positively and negatively rotates, the sliding block does linear reciprocating motion along the spiral guide groove, compresses or releases the elastic piece, the door returning rotating shaft provided with the spiral guide groove is used as a driving connecting piece, and is matched with the sliding block and the guide post, so that the elastic piece is compressed and stored to provide driving force for automatic closing of the cabinet door.

Inventors

  • HE ZIHENG
  • GUO WENXIANG
  • YIN DAO
  • ZHOU YUEPEI
  • ZHOU SHUYUAN
  • ZHANG HAIFENG

Assignees

  • 广东西科冷链科技股份有限公司
  • 广东斯柯电器有限公司

Dates

Publication Date
20260512
Application Date
20260416

Claims (10)

  1. 1. Automatic hinge of returning door, its characterized in that includes: A base (10); A revolving door rotating shaft (20) which is rotatably arranged on the base (10), and a spiral guide groove (21) is formed on the surface of the revolving door rotating shaft; the guide column (30) is arranged on the base (10); A slider (40) slidably connected to the guide post (30) and provided with a pushing portion (42) slidably connected to the spiral guide groove (21); An elastic member (50) for pushing the slider (40) to slide in a direction away from the elastic member (50); When the revolving door shaft (20) rotates positively and negatively, the sliding block (40) moves linearly and reciprocally along the spiral guide groove (21), and compresses or releases the elastic piece (50).
  2. 2. The automatic door returning hinge according to claim 1, wherein a through hole (41) is formed in the middle of the slider (40), the door returning shaft (20) is movably inserted into the through hole (41), and the pushing part (42) is located inside the through hole (41); The elastic piece (50) adopts a spring and is sleeved on the guide post (30); The spiral guide grooves (21) are at least provided with two groups and are arranged in a central symmetry mode.
  3. 3. An automatic return door hinge according to claim 1, characterized in that the spiral guide groove (21) employs a variable lift angle spiral, and that the lift angle increases linearly or piecewise linearly with the position change of the slider (40).
  4. 4. The automatic door returning hinge according to claim 1, wherein a locking groove (22) is provided at an upper end of the spiral guide groove (21), and the locking groove (22) is located outside an upper end of the spiral guide groove (21) in an axial projection direction of the door returning shaft (20).
  5. 5. The automatic door returning hinge according to claim 4, wherein a stop portion (23) is provided on a side of the bottom surface of the locking groove (22) away from the spiral guide groove (21).
  6. 6. The automatic return door hinge according to claim 5, characterized in that the stop portion (23) is a stop groove or a downwardly inclined stop ramp, wherein the angle a of the stop ramp to the horizontal is in the range of 2 ° -10 °.
  7. 7. The automatic door returning hinge according to claim 1, wherein a clearance gap (24) is provided at one side of the lower end of the spiral guide groove (21), and the width of the clearance gap (24) is larger than the width of the spiral guide groove (21) in the axial projection direction of the door returning rotating shaft (20).
  8. 8. The automatic door hinge according to claim 1, wherein the pushing portion (42) is provided with a rolling element (43) which is matched with the spiral guide groove (21), and the rolling element (43) adopts a ball or a rolling bearing.
  9. 9. Cabinet door comprising a door body (60), characterized in that the door body (60) is provided with an automatic return door hinge according to any one of claims 1-8.
  10. 10. Refrigerator comprising a cabinet body (70) and a cabinet door, characterized in that the cabinet door is mounted on the cabinet body (70) by means of an automatic return door hinge according to any one of claims 1-8.

Description

Automatic door hinge, cabinet door and refrigerator Technical Field The invention relates to the technical field of hinges, in particular to an automatic door returning hinge, a cabinet door and a refrigerator. Background In the daily use process of equipment such as a refrigerator, a refrigerator and a disinfection cabinet, a user often forgets to close a door or fails to close the door in place due to negligence, so that the power consumption of the equipment is increased or the equipment cannot be started normally. In order to avoid the situation that the door body is opened for a long time or the door is forgotten to be closed, at present, an automatic door returning mechanism is arranged on a cabinet door, and the cabinet door is automatically driven to be closed through the automatic door returning mechanism. For example, chinese patent publication No. CN101135218a discloses an automatic closing structure of a large refrigerator door, which comprises a connecting piece and a hinge shaft, wherein the hinge shaft is connected with the connecting piece, the door body automatic closing structure is arranged above and/or below the door body, the connecting piece is provided with a first supporting wall with a rectangular structure and a through hole in the center, a second supporting wall is arranged in the through hole, one end of the hinge shaft passes through the through hole, the other end of the hinge shaft is sequentially sleeved with the hinge and the spring, and finally one end of the spring is positioned and fixed by a spring plug. However, the scheme has the advantages of complex overall structure, high machining precision, high assembly difficulty and high machining cost, short structural life and inapplicability to large-area popularization and application. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides an automatic door returning hinge, a cabinet door and a refrigerator. The technical scheme adopted by the invention for solving the technical problems is that the automatic door returning hinge comprises: The base is arranged on the cabinet body; The door-returning rotating shaft is rotationally arranged on the base, a spiral guide groove which is spiral is formed in the surface of the door-returning rotating shaft, and one end of the door-returning rotating shaft is connected with the cabinet door; The guide column is arranged on the base; The sliding block is connected with the guide column in a sliding way and is provided with a pushing part which is connected with the spiral guide groove in a sliding way; one end of the elastic piece is movably abutted on the base, and the other end of the elastic piece is movably abutted on the sliding block and used for pushing the sliding block to slide in a direction away from the elastic piece; When the revolving door revolving shaft rotates positively and negatively, the side wall of one side of the spiral guide groove pushes the sliding block, so that the sliding block makes linear reciprocating motion along the spiral guide groove, and the elastic piece is compressed or released. Preferably, in order to improve the overall compactness of the structure, a through hole is formed in the middle of the sliding block, the revolving shaft of the revolving door is movably arranged in the through hole in a penetrating way, and the pushing part is positioned at the inner side of the through hole; The elastic piece adopts a spring and is movably sleeved on the guide post; The spiral guide groove is provided with two sets of at least to be central symmetry and set up, wherein, spiral guide groove and the setting quantity of pushing away the portion can set up according to the demand, for example, when cabinet door weight is great, can set up more multiunit, thereby sets up multiunit elastic component, improves the thrust of automatic back door. Preferably, the spiral guide groove adopts a variable lift angle spiral, and when the door rotating shaft rotates along with the gradual opening of the cabinet door from the closed state, the lift angle increases linearly or piecewise linearly along with the position change of the sliding block. Preferably, in order to open the cabinet door for a long time, that is, when the cabinet door is opened to a certain angle, a mechanical limit and locking cabinet door can be formed, a locking groove is arranged at the upper end of the spiral guide groove, and the locking groove is positioned at the outer side of the upper end of the spiral guide groove in the axial projection direction of the revolving door rotating shaft. Preferably, in order to avoid that in the locked state, the door is suddenly closed due to a false touch, a stop part is arranged at the side of the bottom surface of the locking groove, which is far away from the spiral guiding groove. Preferably, the stop part is a stop groove or a downward inclined stop inclined surface, wherein an included angle alpha betwe