Electromotive furniture drive

Patent metadata

Field	Value
Publication number	US-10021991-B2
Application number	US-201314418836-A
Country	US
Kind code	B2
Filing date	Jul 30, 2013
Priority date	Aug 2, 2012
Publication date	Jul 17, 2018
Grant date	Jul 17, 2018

Abstract

An electromotive furniture drive with a guide path and an output unit which moves along the guide path and which at least partly surrounds the guide path. The guide path has a gear rack, and the output unit has a drive motor with a speed-reducing mechanism and an output gear which is in engagement with the gear rack of the guide path.

First claim

The invention claimed is:

1. An electromotive furniture drive, comprising:
a guideway comprising a guide profile and a gear rack;
an output unit configured to at least partly surround the guideway, said output unit having an output gear in engagement with the gear rack and a drive mechanism in driving relationship to the output gear,
limit switches or limit stops configured to prevent a movement of the output unit beyond ends of the guideway, and
at least one switching cam arranged on a fastening flange at an end of the guide profile for actuating the limit switches to prevent further travel of the output unit in a direction of the actuated limit switch,
wherein the drive mechanism includes a drive motor with a speed-reducing mechanism,
and
wherein the guide profile comprises a groove for accommodating the gear rack.

2. The electromotive furniture drive of claim 1 , wherein the groove has a C-shaped configuration.

3. The electromotive furniture drive of claim 1 , wherein the gear rack is integrally formed with the guide profile.

4. The electromotive furniture drive of claim 1 , further comprising a track arranged adjacent to the gear rack, and a counter bearing received in the track and configured to mount the output gear directly or indirectly.

5. The electromotive furniture drive of claim 4 , wherein the gear rack extends along a side of the track, said track having another side extending in opposite relation to the gear rack and provided with a contact edge for the counter bearing.

6. The electromotive furniture drive of claim 1 , further comprising a bearing pin fixed to a housing of the output unit supporting the output gear.

7. The electromotive furniture drive of claim 6 , wherein the bearing pin has one end formed integrally with the housing of the output unit, and another end cooperating with a counter bearing.

8. The electromotive furniture drive of claim 6 , wherein the bearing pin is fixed at both ends in the housing of the output unit.

9. The electromotive furniture drive of claim 1 , wherein the output unit comprises a fastening member on at least one side of the output unit for fixing to a furniture part or a part of a furniture fitting.

10. The electromotive furniture drive of claim 1 , wherein the output unit comprises fastening members on two opposite sides of the output unit for fixing to a furniture part or a part of a furniture fitting.

11. The electromotive furniture drive of claim 1 , wherein the speed-reducing mechanism is configured as a worm gear having a worm connected to the drive motor, and a worm wheel connected to the output gear.

12. The electromotive furniture drive of claim 1 , further comprising a carpet protection shield attachable to the electromotive furniture drive to shield the electromotive furniture drive in a downward direction at least in a region of a path of displacement of the output unit.

Assignees

• Dewertokin Gmbh

Inventors

• Klimm Hartmut

Classifications

• F16H19/04

  comprising a rack · CPC title

• F16H25/2015

  Means specially adapted for stopping actuators in the end position; Position sensing means · CPC title

• A47C20/046 Primary

  by means of a rack-and-pinion or like gearing mechanism · CPC title

• A47C20/041

  by electric motors · CPC title

• F16H1/16

  comprising worm and worm-wheel · CPC title