The invention provides a constant force lifting device. The constant force lifting device comprises a bracket (1), a heavy matter rack (2), a pulley block (3), a traction line (4), a power structure and a power adjusting device; the power structure comprises a tower-shaped wire spool (5) and a contact type flat spiral spring (6); one end of the traction line (4) is fixed to the root part of a line slot (14) in the tower-shaped wire spool (5), and while the other end of the traction line (4) is bypassed a fixed pulley of a fixed pulley block and a movable pulley of a movable pulley block to be fixed to the fixed pulley block; the heavy matter rack (2) is connected with the movable pulley block, and two sides of the heavy matter rack (2) are glidingly connected to two parallel guide rails (7) on the front surface of the bracket (1); the outer end part of the contact type flat spiral spring (6) is fixed to the inner wall of the tower-shaped wire spool (5), and while the inner end part of the contact type flat spiral spring (6) is connected with the power adjusting device. With the adoption of the constant force lifting device, the constant force can be increased and decreased in the whole bracket range, and moreover, the force can be saved.
Constant force lifting device
2015-04-29
Patent
Electronic Resource
English
IPC: | F16M Rahmen, Gehäuse oder Grundplatten von Kraftmaschinen oder anderen Maschinen oder von Apparaten, nicht auf eine besondere Art von Maschine oder Apparat eingeschränkt, die anderweitig vorgesehen ist , FRAMES, CASINGS, OR BEDS, OF ENGINES OR OTHER MACHINES OR APPARATUS, NOT SPECIFIC TO AN ENGINE, MACHINE, OR APPARATUS PROVIDED FOR ELSEWHERE / B66D Haspeln , CAPSTANS |
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