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1. WO2001057473 - REACTIONLESS ROTARY DRIVE MECHANISM

Publication Number WO/2001/057473
Publication Date 09.08.2001
International Application No. PCT/GB2001/000370
International Filing Date 31.01.2001
IPC
G01B 5/008 2006.01
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
5Measuring arrangements characterised by the use of mechanical means
004for measuring coordinates of points
008using coordinate measuring machines
H02K 16/02 2006.01
HELECTRICITY
02GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
16Machines with more than one rotor or stator
02Machines with one stator and two rotors
CPC
G01B 5/008
GPHYSICS
01MEASURING; TESTING
BMEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
5Measuring arrangements characterised by the use of mechanical means
004for measuring coordinates of points
008using coordinate measuring machines
H02K 16/025
HELECTRICITY
02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
KDYNAMO-ELECTRIC MACHINES
16Machines with more than one rotor or stator
02Machines with one stator and two ; or more; rotors
025with rotors and moving stators connected in a cascade
Y10T 74/18664
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
74Machine element or mechanism
18Mechanical movements
18568Reciprocating or oscillating to or from alternating rotary
18576including screw and nut
18664Shaft moves through rotary drive means
Y10T 74/1876
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
74Machine element or mechanism
18Mechanical movements
18568Reciprocating or oscillating to or from alternating rotary
1876including inertia device
Applicants
  • RENISHAW PLC [GB]/[GB] (AllExceptUS)
  • WESTON, Nicholas, John [GB]/[GB] (UsOnly)
  • NAI, Kenneth, Cheng-Hoe [SG]/[GB] (UsOnly)
  • MCFARLAND, Geoff [GB]/[GB] (UsOnly)
  • MCMURTRY, David, Roberts [GB]/[GB] (UsOnly)
Inventors
  • WESTON, Nicholas, John
  • NAI, Kenneth, Cheng-Hoe
  • MCFARLAND, Geoff
  • MCMURTRY, David, Roberts
Agents
  • WAITE, John
Priority Data
0002375.403.02.2000GB
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) REACTIONLESS ROTARY DRIVE MECHANISM
(FR) MECANISME D'ENTRAINEMENT ROTATIF SANS INCIDENCE SECONDAIRE
Abstract
(EN)
An articulating probe head includes motors (12 and 18) for driving respective output shafts (14 and 20) about respective orthogonal axes (Z and X) to move a stylus (22) over the surface of a workpiece under the control of a controller (26). At least one of the motors is inertia balanced by mounting the stator (32) of the motor on bearings (42) to allow it to rotate in opposition to the rotation of the rotor (34). Control of the speed of the spinning stator is achieved by connecting it to the winding assembly (46) of an additional 'back-to-earth' motor (47), the magnet assembly (48) of which is connected to the housing. The motor (47) acts as a brake to prevent overspeeding of the rotatable stator.
(FR)
L'invention concerne une tête de sonde articulée comprenant des moteurs (12 et 18) servant à entraîner respectivement des arbres de sortie (14 et 20) autour d'axes orthogonaux correspondants (Z et X), de manière à déplacer un stylet (22) sur la surface d'une pièce de travail, sous la commande d'un module de commande (26). L'un des moteurs, au moins, est équilibré en inertie par montage du stator (32) du moteur sur des paliers (42), de manière à permettre au stator de tourner de manière opposée à la rotation du rotor (34). On régule la vitesse du stator de rotation à grande vitesse en connectant le stator à l'ensemble enroulement (46) d'un moteur supplémentaire (47) dit 'back-to-earth', dont on a connecté l'ensemble aimants (48) au logement, ce moteur (47) agissant comme un frein pour empêcher le stator de tourner trop vite.
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