Patent ID: 9695019
Date: 2017-07-04
CPC Classifications: B66C

Claim:
1. A suspension lifting device comprising: a base unit, a bearing unit, a balance unit, a servo unit and a hanging unit; wherein: the base unit includes a first plate, a second plate mounted on a bottom of the first plate, and a third plate connected with the second plate; the first plate is provided with at least one slot and a recess; the second plate has a substantially L-shaped profile and defines a vertical section and a horizontal section; the vertical section of the second plate has an end face provided with two longitudinal connecting portions; the horizontal section of the second plate has an end face provided with two longitudinal connecting portions; the third plate has an end face provided with two longitudinal connecting portions connected with the two longitudinal connecting portions of the horizontal section of the second plate; the third plate is provided with at least one shaft hole; the bearing unit includes a positioning piece and two forks connected with the positioning piece; the positioning piece has a rear face provided with two longitudinal connecting portions connected with the two longitudinal connecting portions of the vertical section of the second plate; the positioning piece has a front face provided with two transverse connecting portions; each of the two forks has a substantially L-shaped profile and defines a vertical section and a horizontal section; the vertical section of each of the two forks has a rear face provided with two transverse connecting portions connected with the two transverse connecting portions of the positioning piece, to adjust a distance between the two forks; the balance unit includes at least one weight bar and at least one driven shaft; the at least one weight bar has a front end provided with two pivot ears, with the third plate of the base unit being sandwiched between the two pivot ears of the at least one weight bar; each of the two pivot ears of the at least one weight bar is provided with a shaft hole aligning with the at least one shaft hole of the third plate; the at least one weight bar has a rear end provided with at least one recessed portion; the at least one driven shaft has a horizontal section and a vertical section; the vertical section of the at least one driven shaft extends downward from a first end of the horizontal section and extends through the shaft hole of each of the two pivot ears of the at least one weight bar and the at least one shaft hole of the third plate; the vertical section of the at least one driven shaft has a top face provided with a driven hole; the horizontal section of the at least one driven shaft rests on a top face of the at least one weight bar; the servo unit includes at least one housing inserted through the at least one slot of the first plate, at least one balance sensing apparatus mounted in the at least one housing, and at least one power output shaft protruding outward from a bottom of the at least one housing and engaging the driven hole of the at least one driven shaft; when the at least one balance sensing apparatus detects that a foreign object is placed on the bearing unit, the at least one balance sensing apparatus calculates a value required for reaching a balance weight and transmits a command signal to the at least one power output shaft which transmits a power to drive the balance unit to swing leftward and rightward, so as to reach a balance state; the hanging unit includes a hanging seat and a hanging rod; the hanging seat is secured in the recess of the first plate and is provided with a mounting hole; the hanging rod has an upper end protruding outward from the hanging seat and provided with a hanging hole; and the hanging rod has a lower end provided with a universal ball movably mounted in the mounting hole of the hanging seat.