Hoisting gear for backrest on sickbed of medical use
A lifting device and backrest technology, which is applied in the field of medical beds, can solve the problems of not being able to touch the patient, the complex structure of the lifting mechanism, and high cost, and achieve the effects of simple and ingenious structure, flexible and reliable operation, and strong practicability
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[0012] The backrest lifting device of the medical hospital bed according to the present invention, as shown in accompanying drawings 1 to 4, comprises a bed core frame 1, a backrest frame 3 and a backrest lifting mechanism, and the right end of the backrest frame 3 is rotatably fixed on the bed core frame by a hinge 2 1, the lifting of the backrest frame 3 is controlled by the backrest lifting mechanism, which includes a lifting push rod 31, a screw mandrel 4, a manual bevel gear 5, a bevel gear nut 6, a movable nut seat part 7, a manual shaft 8, and a hand wheel 9 and the fixed ring 10, the center of the bevel gear nut 6 is provided with an internal thread, and its lower end is provided with a shoulder, and the shoulder bearing 71 is installed on the bearing seat 72, and the bearing seat 72 is reversibly mounted on the fixed ring 10 by two screws 73 Inside, the bevel gear nut 6 can rotate relative to the bearing seat 72, and can turn around the connection line of the two screw...
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