US 12,466,693 B2Granted

Winding drum and torsion spring for a winding drum

AssigneeIgus GmbH

InventorJan Hoffmann

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Abstract

A winding drum for a line and/or for a line guide device which is adapted to receive and guide at least one line, wherein the drum is rotatable about the longitudinal axis thereof, wherein a first end region of the line and/or line guide device is or can be fixed to the drum and the line and/or line guide device can be wound on to and unwound from the drum by rotation of the winding drum in a winding-on and an unwinding direction about the drum longitudinal axis, wherein there is provided a drive device engaging the winding drum in order upon rotation of the drum in the unwinding direction thereof to exert a return force on the drum for rotation thereof in the winding-on direction. The drive device is in the form of a torsion spring which upon rotation of the drum in the unwinding direction is subjected to torsional stress and by virtue of the torsional stress exerts a torque on the drum for rotation thereof in the winding-on direction and the torsional stress exerts the return force on the drum.

Claims23

Dependent claims

A torsion spring for a winding drum, comprising:

an elongated main body having a longitudinal axis, the elongated main body includes at least a first segment and a second segment which are rotatable relative to each other about the elongated main body longitudinal axis,
wherein the first segment and the second segment are arranged at opposite end regions of the torsion spring,
wherein there is provided at least one elastically stretchable spring element,
wherein the at least one elastically stretchable spring element is in a form of an elongated element in its non-deformed state and the at least one elastically stretchable spring element has a first end region and a second end region, the first end region and the second end region being provided at opposite ends of the at least one elastically stretchable spring element,
wherein the first end region of the at least one elastically stretchable spring element is provided with a first coupling region that is fixed to the first segment of the elongated main body by a first fixing element and the second end region of the at least one elastically stretchable spring element is provided with a second coupling region that is fixed to the second segment of the elongated main body by a second fixing element,
wherein the at least one elastically stretchable spring element couples to the first segment and/or to the second segment of the elongated main body outside the longitudinal axis of the elongated main body, and
wherein upon rotation of the first segment and the second segment of the elongated main body relative to each other about the longitudinal axis of the elongated main body, the at least one elastically stretchable spring element is wound around the elongated main body and the at least one elastically stretchable spring element experiences a reversible elongation of the elongated element around the elongated main body.

4 more elements

A torsion spring for a winding drum, comprising:

an elongated main body having a longitudinal axis, the elongated main body includes at least a first segment and a second segment which are rotatable relative to each other about the elongated main body longitudinal axis,
wherein the first segment and the second segment are arranged at opposite end regions of the torsion spring,
wherein there is provided at least one elastically stretchable spring element,
wherein the at least one elastically stretchable spring element is in a form of an elongated element in its non-deformed state and the at least one elastically stretchable spring element has a first end region and a second end region, the first end region and the second end region being provided at opposite ends of the at least one elastically stretchable spring element,
wherein the first end region of the at least one elastically stretchable spring element is provided with a first coupling region that is fixed to the first segment of the elongated main body by a first fixing element and the second end region of the at least one elastically stretchable spring element is provided with a second coupling region that is fixed to the second segment of the elongated main body by a second fixing element,
wherein the at least one elastically stretchable spring element couples to the first segment and/or to the second segment of the elongated main body outside the longitudinal axis of the elongated main body,
wherein upon torsional stressing of the torsion spring, the first and the second coupling regions of the spring element are essentially invariable in position in relation to a longitudinal direction of the torsion spring, and
wherein upon rotation of the first segment and the second segment of the elongated main body relative to each other about the longitudinal axis of the elongated main body, the at least one elastically stretchable spring element is wound around the elongated main body and the at least one elastically stretchable spring element experiences a reversible elongation of the elongated element around the elongated main body.

5 more elements

A torsion spring for a winding drum, comprising:

an elongated main body having a longitudinal axis, the elongated main body includes at least a first segment and a second segment which are rotatable relative to each other about the elongated main body longitudinal axis,
wherein the first segment and the second segment are arranged at opposite end regions of the torsion spring,
wherein there is provided at least one elastically stretchable spring element,
wherein the at least one elastically stretchable spring element is in a form of an elongated element in its non-deformed state and the at least one elastically stretchable spring element has a first end region and a second end region, the first end region and the second end region being provided at opposite ends of the at least one elastically stretchable spring element,
wherein the first end region of the at least one elastically stretchable spring element is provided with a first coupling region that is fixed to the first segment of the elongated main body by a first fixing element and the second end region of the at least one elastically stretchable spring element is provided with a second coupling region that is fixed to the second segment of the elongated main body by a second fixing element,
wherein the at least one elastically stretchable spring element couples to the first segment and/or to the second segment of the elongated main body in a region of an outer periphery of the first segment and/or of the second segment of the elongated main body,
wherein upon torsional stressing of the torsion spring, a spacing of the first segment of the elongated main body to the second segment of the elongated main body in a longitudinal direction of the torsion spring does not change substantially or does not change,
wherein the at least one elastically stretchable spring element couples to the first segment and/or to the second segment of the elongated main body outside the longitudinal axis of the elongated main body, and
wherein upon rotation of the first segment and the second segment of the elongated main body relative to each other about the longitudinal axis of the elongated main body, the at least one elastically stretchable spring element is wound around the elongated main body and the at least one elastically stretchable spring element experiences a reversible elongation of the elongated element around the elongated main body.

6 more elements

A torsion spring for a winding drum, comprising:

an elongated main body having a longitudinal axis, the elongated main body includes at least a first segment and a second segment which are rotatable relative to each other about the elongated main body longitudinal axis,
wherein the first segment and the second segment are arranged at opposite end regions of the torsion spring,
wherein there is provided at least one elastically stretchable spring element,
wherein the at least one elastically stretchable spring element is in a form of an elongated element in its non-deformed state and the at least one elastically stretchable spring element has a first end region and a second end region, the first end region and the second end region being provided at opposite ends of the at least one elastically stretchable spring element,
wherein the first end region of the at least one elastically stretchable spring element is provided with a first coupling region that is fixed to the first segment of the elongated main body by a first fixing element and the second end region of the at least one elastically stretchable spring element is provided with a second coupling region that is fixed to the second segment of the elongated main body by a second fixing element,
wherein upon rotation of the first segment and the second segment of the elongated main body relative to each other about the longitudinal axis of the elongated main body, the at least one elastically stretchable spring element is wound around the elongated main body and the at least one elastically stretchable spring element experiences a reversible elongation,
wherein the at least one elastically stretchable spring element couples to the first segment and/or to the second segment of the elongated main body outside the longitudinal axis of the elongated main body,
wherein the elongated main body includes at least one further segment arranged in a longitudinal direction of the elongated main body between the first segment and the second segment and the at least one further segment is rotatable about the elongated main body longitudinal axis relative to the first segment and the second segment and that the at least one elastically stretchable spring element couples to the at least one further segment,
wherein the elongation of the at least one elastically stretchable spring element causes rotation of the at least one further segment about the longitudinal axis of the elongated main body, and
wherein the at least one further segment comprises a holding region to which the at least one elastically stretchable spring element couples, wherein the holding region is arranged at an outer periphery of the further segment.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/757,190Filed 2 Dec 2020
Priority: DE 20 2019 106 965.113 Dec 2019
Published: US 2023/0011558 A112 Jan 2023
Granted: 11 Nov 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

B65H 75/486
Automatic re-storing devices: arrangements or adaptations of the spring motor
B65H 75/4449
Constructional details: arrangements or adaptations to avoid movable contacts or rotary couplings, e.g. by the use of an expansion chamber for a…
F03G 1/026
Characterised by shape or material of spring, e.g. helical, spiral, coil: using torsion springs
F16G 13/16
Hauling- or hoisting-chains so called ornamental chains: with arrangements for holding electric cables, hoses, or the like