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A platform for research: civil engineering, architecture and urbanism
Vertical automatic door closing device
The invention discloses a vertical automatic door closing device. The vertical automatic door closing device comprises a cylinder and a lower supporting arm, and a spline shaft is arranged in the cylinder. A cam sleeve is arranged at the other end of the cylinder. An oil needle and a cam device are arranged in the cam sleeve in the axial direction. The cam device comprises a hollow cylindrical piston and cams. A check valve device is arranged at the upper end of the cylindrical piston. An oil needle hole is formed in the center of the check valve device. The lower segment of the oil needle is arranged in the oil needle hole. A pin shaft is arranged on the cylindrical piston. The lower end of the cylindrical piston is arranged at the upper end of the spline shaft through a spline. The cams comprise the upper conical cam and the lower conical cam. The conical faces of the two conical cams oppositely form a sliding channel which makes axial face contact with the pin shaft. The lower supporting arm is arranged at the lower end of the cylinder after being connected to the lower end of the spline shaft in a sleeving manner. A spring is arranged in the cylinder and arranged between the cams and the lower supporting arm. The cylinder is filled with hydraulic oil. The cylinder forms a sealed structure relative to the outside.
Vertical automatic door closing device
The invention discloses a vertical automatic door closing device. The vertical automatic door closing device comprises a cylinder and a lower supporting arm, and a spline shaft is arranged in the cylinder. A cam sleeve is arranged at the other end of the cylinder. An oil needle and a cam device are arranged in the cam sleeve in the axial direction. The cam device comprises a hollow cylindrical piston and cams. A check valve device is arranged at the upper end of the cylindrical piston. An oil needle hole is formed in the center of the check valve device. The lower segment of the oil needle is arranged in the oil needle hole. A pin shaft is arranged on the cylindrical piston. The lower end of the cylindrical piston is arranged at the upper end of the spline shaft through a spline. The cams comprise the upper conical cam and the lower conical cam. The conical faces of the two conical cams oppositely form a sliding channel which makes axial face contact with the pin shaft. The lower supporting arm is arranged at the lower end of the cylinder after being connected to the lower end of the spline shaft in a sleeving manner. A spring is arranged in the cylinder and arranged between the cams and the lower supporting arm. The cylinder is filled with hydraulic oil. The cylinder forms a sealed structure relative to the outside.
Vertical automatic door closing device
TIAN XIAOGUANG (author) / ZHAO YONGQI (author)
2015-12-09
Patent
Electronic Resource
English
IPC:
E05F
DEVICES FOR MOVING WINGS INTO OPEN OR CLOSED POSITION
,
Vorrichtungen zum Bewegen der Flügel in die Offen- oder Schließstellung
Automatic door closing device for vertical refrigerator and vertical refrigerator
| European Patent Office | 2024