Drive device having a tubular linear motor
AssigneeNti AG
InventorRonald Rohner
Life of this patent
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Abstract
A drive device comprises at least one tubular linear motor (M1; M1′; M2) which has a cylindrical armature (20; 120) and a tubular stator (10) with a cylindrical magnetic yoke (11) and a through-hole (13) coaxial with the magnetic yoke (11). Electric drive coils (12; 112) are arranged in the magnetic yoke (11). The armature (20; 120) has a non-magnetic armature tube (21) in which permanent magnets (23) are arranged. The armature (20; 120) extends coaxially through the through-hole (13) and is mounted so as to be movable in its longitudinal direction relative to the stator (10). The drive device comprises linear ball bearings (15; 115), and the armature (20; 120) of the tubular linear motor (M1; M1′; M2) is mounted in the linear ball bearings (15; 115).
Claims17
A drive device comprising:
- at least one tubular linear motor which has a cylindrical armature and a tubular stator with a cylindrical magnetic yoke and a through-hole coaxial with the magnetic yoke,
- wherein electric drive coils are arranged in the magnetic yoke,
- wherein the armature comprises a continuous non-magnetic armature tube in which a plurality of permanent magnets are arranged,
- wherein the continuous non-magnetic armature tube extends coaxially through the through-hole projecting further from the stator and is mounted so as to be movable in its longitudinal direction relative to the stator,
- wherein the drive device comprises linear ball bearings, each linear ball bearing comprising a tubular housing and balls distributed along an axial direction of the tubular housing, wherein the tubular housing is configured to facilitate ball circulation along the axial direction, and
- wherein the non-magnetic armature tube is mounted in the linear ball bearings and in contact with the balls of the linear ball bearings.
A drive device comprising:
- at least one tubular linear motor which has a cylindrical armature and a tubular stator with a cylindrical magnetic yoke and a through-hole coaxial with the magnetic yoke,
- wherein electric drive coils are arranged in the magnetic yoke,
- wherein the armature has a non-magnetic armature tube in which permanent magnets are arranged, and
- wherein the armature extends coaxially through the through-hole and is mounted so as to be movable in its longitudinal direction relative to the stator,
- wherein the drive device comprises linear ball bearings,
- wherein the armature of the tubular linear motor is mounted in the linear ball bearings, and
- wherein the drive device comprises a supplementary guide means with a guide rod parallel to the armature of the tubular linear motor, which guide rod is mounted so as to be longitudinally movable in additional linear ball bearings and is kinematically coupled to the armature of the tubular linear motor.
A drive device comprising:
- at least one tubular linear motor which has a cylindrical armature and a tubular stator with a cylindrical magnetic yoke and a through-hole coaxial with the magnetic yoke,
- wherein electric drive coils are arranged in the magnetic yoke,
- wherein the armature has a non-magnetic armature tube in which permanent magnets are arranged, and
- wherein the armature extends coaxially through the through-hole and is mounted so as to be movable in its longitudinal direction relative to the stator,
- wherein the drive device comprises linear ball bearings,
- wherein the armature of the tubular linear motor is mounted in the linear ball bearings, and
- wherein the drive device comprises two tubular linear motors arranged in parallel, the armatures of the two parallel tubular linear motors being kinematically coupled to one another.
Dependencies are inferred from the claim text.