Speed limiter in an elevator system
AssigneeInventio AG
InventorsMarcel Imfeld, Karsten Gensicke
Life of this patent
Estimating the term…
Abstract
A speed limiter for an elevator system includes: at least one speed limiter wheel having a first radial cam with lobes, and at least a second, phase-shifted radial cam with lobes; a first mass, which is rotatably arranged in a first pivot bearing and which together with a first roller rolls on the first radial cam such that the first mass follows a first oscillating motion when the speed limiter wheel rotates; and a second mass, which is rotatably arranged in a second pivot bearing and which together with a second roller rolls on the second radial cam such that the second mass follows a second oscillating motion when the speed limiter wheel rotates.
Claims16
A speed limiter for an elevator installation, comprising:
- a speed limiter wheel with a first cam disc having a first control cam with lobes and with a second cam disc having a second control cam with lobes;
- a first mass which rolls by a first roller on the first control cam so that the first mass describes a first oscillatory motion during rotations of the speed limiter wheel;
- a second mass which rolls by a second roller on the second control cam so that the second mass describes a second oscillatory motion during rotations of the speed limiter wheel, wherein there is a phase displacement between the first control cam and the second control cam for reducing vibration in the speed limiter;
- and
- wherein the first mass on reaching a first excess speed actuates a first mechanism for advance switching-off of a drive of the elevator installation and on reaching a second, higher excess speed the second mass triggers a second mechanism for actuation of at least one safety brake device for an elevator car of the elevator installation.
A speed limiter for an elevator installation, comprising:
- a speed limiter wheel with a first cam disc having a first control cam with lobes and with a second cam disc having a second control cam with lobes;
- a first mass which rolls by a first roller on the first control cam so that the first mass describes a first oscillatory motion during rotations of the speed limiter wheel;
- and
- a second mass which rolls by a second roller on the second control cam so that the second mass describes a second oscillatory motion during rotations of the speed limiter wheel, wherein there is a phase displacement between the first control cam and the second control cam for reducing vibration in the speed limiter.
A method of operating a speed limiter, comprising the following steps:
- providing a speed limiter wheel with a first mass with a first roller, a first cam disc with a first control cam, a second mass with a second roller, and a second cam disc with a second control cam;
- rolling the first roller of the first mass on the first control cam of the first cam disc so that the first mass is set into a first oscillatory motion;
- and
- rolling the second roller of the second mass on the second control cam of the second cam disc so that the second mass is set into a second oscillatory motion, wherein the first control cam and the second control cam are displaced in phase relative to one another or arranged with a phase displacement to reduce vibrations in the speed limiter.
Dependencies are inferred from the claim text.