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US 12,276,320 B2Granted
Spindle system, linear actuator and piece of furniture
AssigneeLOGICDATA Electronic & Software Entwicklungs GmbH
InventorsHaymo Niederkofler, Hannes Puck
Life of this patent
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Abstract
In a spindle system with a hollow spindle for a linear actuator, the linear actuator has a telescopic tube system including an outer tube and at least one inner tube arranged coaxially with the outer tube and at least partially surrounded by the outer tube. A bearing is arranged to transmit axial forces between the hollow spindle and the outer tube. The hollow spindle at least partially surrounds an inner shaft of the spindle system and is connected to the inner shaft of the spindle system by one or more tappets of a positive and axially displaceable shaft-hub connection. The hollow spindle has a bearing seat for the bearing and an external thread on an outer side.
Claims18
A spindle system for a linear actuator, wherein the linear actuator has a telescopic tube system having an outer tube and at least one inner tube arranged coaxially with the outer tube and at least partially surrounded by the outer tube, the spindle system comprising:
- an inner shaft;
- a sliding element connected to the inner shaft in a rotationally fixed manner, wherein the sliding element comprises one or more first tappets associated with a first profiling of the inner shaft, wherein the sliding element further comprises one or more elastic compensating elements;
- a bearing;
- and
- a hollow spindle at least partially surrounding the inner shaft, wherein the telescopic tube system surrounds the hollow spindle, the hollow spindle comprising:
- one or more second tappets associated with a second profiling of an inner side of the hollow spindle, wherein the hollow spindle is connected to the inner shaft by a positive and axially displaceable shaft-hub connection defined by the first profiling and the second profiling, wherein the one or more elastic compensating elements engage the one or more second tappets to minimize radial play between the one or more first tappets and the one or more second tappets over an entire length of the hollow spindle;
- an outer side having an external thread;
- and
- a bearing seat, wherein the bearing is seated in the bearing seat, and wherein the bearing is configured to transmit axial thrust forces or axial tensile forces between the hollow spindle and the outer tube, wherein a rotational movement of the spindle system does not cause a rotational movement of the outer tube, wherein the external thread, the one or more second tappets, and the bearing seat are formed as a single casting of a plastic material.
6 more elements
A linear actuator comprising:
- a telescopic tube system having an outer tube and at least one inner tube arranged coaxially with the outer tube and at least partially surrounded by the outer tube;
- and
- a spindle system comprising:
- an inner shaft;
- a sliding element connected to the inner shaft in a rotationally fixed manner, wherein the sliding element comprises one or more first tappets associated with a first profiling of the inner shaft, wherein the sliding element further comprises one or more elastic compensating elements;
- a bearing;
- and
- a hollow spindle at least partially surrounding the inner shaft, wherein the telescopic tube system surrounds the hollow spindle, the hollow spindle comprising:
- one or more second tappets associated with a second profiling of an inner side of the hollow spindle, wherein the hollow spindle is connected to the inner shaft by a positive and axially displaceable shaft-hub connection defined by the first profiling and the second profiling, wherein the one or more elastic compensating elements engage the one or more second tappets to minimize radial play between the one or more first tappets and the one or more second tappets over an entire length of the hollow spindle;
- an outer side having an external thread;
- and
- a bearing seat, wherein the bearing is seated in the bearing seat, and wherein the bearing is configured to transmit axial thrust forces or axial tensile forces between the hollow spindle and the outer tube, wherein a rotational movement of the spindle system does not cause a rotational movement of the outer tube, wherein the external thread, the one or more second tappets, and the bearing seat are formed as a single casting of a plastic material.
9 more elements
A piece of furniture comprising a linear actuator, the linear actuator comprising:
- a telescopic tube system having an outer tube and at least one inner tube arranged coaxially with the outer tube and at least partially surrounded by the outer tube;
- and
- a spindle system comprising:
- an inner shaft;
- a sliding element connected to the inner shaft in a rotationally fixed manner, wherein the sliding element comprises one or more first tappets associated with a first profiling of the inner shaft, wherein the sliding element further comprises one or more elastic compensating elements;
- a bearing;
- and
- a hollow spindle at least partially surrounding the inner shaft, wherein the telescopic tube system surrounds the hollow spindle, the hollow spindle comprising:
- one or more second tappets associated with a second profiling of an inner side of the hollow spindle, wherein the hollow spindle is connected to the inner shaft by a positive and axially displaceable shaft-hub connection defined by the first profiling and the second profiling, wherein the one or more elastic compensating elements engage the one or more second tappets to minimize radial play between the one or more first tappets and the one or more second tappets over an entire length of the hollow spindle;
- an outer side having an external thread;
- and
- a bearing seat, wherein the bearing is seated in the bearing seat, and wherein the bearing is configured to transmit axial thrust forces or axial tensile forces between the hollow spindle and the outer tube, wherein a rotational movement of the spindle system does not cause a rotational movement of the outer tube, wherein the external thread, the one or more second tappets, and the bearing seat are formed as a single casting of a plastic material.
9 more elements
Dependencies are inferred from the claim text.