US 8,317,276 B2Granted

Furniture drive for driving a movable furniture part

AssigneeJulius Blum GmbH

InventorsEdgar Huber, Gerald Friesenecker

Life of this patent

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Abstract

A furniture drive is provided for driving a movable piece of furniture. The drive includes an electric motor, an actuator that can be moved back and forth between two end positions to apply a force on the piece of furniture to be driven, and a gearbox connected between the electric motor and actuator. The gearbox has at least one gear stage configured as an eccentric gearbox and includes two gear wheels that mesh with each other. One of the two gear wheels is firmly connected or coupled to the actuator, and the other gear wheel is coupled to the electric motor such that the eccentric gearbox has two limit positions which correspond to the end positions of the actuator. Upon a rotation of the gear wheels, starting from the limit positions, the gear ratio decreases over a deformed rotational angle range.

Claims20

Dependent claims

A furniture drive for driving a movable furniture part, said furniture drive comprising:

an electric motor;
an actuator configured to reciprocate between two end positions so as to apply force to the furniture part to be driven;
and
a transmission connected between said electric motor and said actuator, said transmission having a transmission stage comprising an eccentric transmission including two mutually meshing gears, a first one of said two gears being connected to said actuator and a second one of said two gears being coupled to said electric motor so that said eccentric transmission has two end positions corresponding to said end positions of said actuator, and so that a transmission ratio decreases upon a rotation of said two gears from each of said two end positions towards a center position of said eccentric transmission over a defined rotary angle range;
wherein axes of rotation of said two gears of said eccentric transmission are arranged at a fixed spacing from each other;
and
wherein a radius of said second one of said two gears increases starting from each end position over said defined rotary angle range, and a radius of said first one of said two gears correspondingly decreases starting from each end position over said defined rotary angle range.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 12/878,256Filed 9 Sep 2010 · continuation
Priority: AT A 447/200821 Mar 2008
Published: US 2010/0327717 A130 Dec 2010
Granted: 27 Nov 2012
Term ends: Not estimatedThe source records don’t support an estimate.

Classification17 codes

F16H 19/001
Gearings comprising essentially only toothed gears or friction members and not capable of conveying indefinitely-continuing rotary motion: for…
E05F 15/63
For swinging wings: operated by swinging arms
E05D 15/262
For folding wings: folding vertically
E05Y 2201/216
Disengaging means: clutches