Electro-mechanical pivot wing drive for pivoting wings of doors or the like
First Claim
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1. An electro-mechanical rotary leaf drive for pivotal leaves for doors comprising:
- an elongated housing,an electric motor and a transmission adjoining said electric motor as an axial extension thereof and in said housing,said transmission having an intermediate output shaft drivingly connected with a bevel transmission, said bevel transmission having an output drive shaft arranged transversely of said elongated housing and adapted for coupling with a linkage for driving a pivotal leaf,a restoring spring unit acting on the output drive shaft,said restoring spring unit comprising a helical spring having at least thirty turns and a spring moment during an opening movement of the rotary leaf which increases less than 100% as a maximum, said helical spring surrounding one of said electric motor and said transmission and at a drive output end thereof bearing against an entrainment means, said entrainment means being connected in such manner as to prevent relative rotation with said intermediate shaft, andmeans for deenergizing said electric motor during the entire closing phase of the pivotal leaf to obtain a generator effect and consequent damping during the door closing phase.
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Abstract
The electro-mechanical drive includes an electric motor, a transmission and a restoring spring. To improve the capacity to close the door, particularly in the event of a power failure, a large coil spring used as the restoring spring surrounds the electric motor and transmission. The electric motor is short circuited when not powered in order to create a generator effect with consequent damping during movement of the door.
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19 Claims
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1. An electro-mechanical rotary leaf drive for pivotal leaves for doors comprising:
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an elongated housing, an electric motor and a transmission adjoining said electric motor as an axial extension thereof and in said housing, said transmission having an intermediate output shaft drivingly connected with a bevel transmission, said bevel transmission having an output drive shaft arranged transversely of said elongated housing and adapted for coupling with a linkage for driving a pivotal leaf, a restoring spring unit acting on the output drive shaft, said restoring spring unit comprising a helical spring having at least thirty turns and a spring moment during an opening movement of the rotary leaf which increases less than 100% as a maximum, said helical spring surrounding one of said electric motor and said transmission and at a drive output end thereof bearing against an entrainment means, said entrainment means being connected in such manner as to prevent relative rotation with said intermediate shaft, and means for deenergizing said electric motor during the entire closing phase of the pivotal leaf to obtain a generator effect and consequent damping during the door closing phase. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
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Specification