Winding drum and torsion spring for a winding drum

Patent metadata

Field	Value
Publication number	US-12466693-B2
Application number	US-202017757190-A
Country	US
Kind code	B2
Filing date	Dec 2, 2020
Priority date	Dec 13, 2019
Publication date	Nov 11, 2025
Grant date	Nov 11, 2025

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.

First claim

What is claimed is:

1 . 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.

2 . The torsion spring according to claim 1 , wherein the torsion spring is disposed as a drive device for 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 winding 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 winding drum and by rotation of the winding drum in a winding-on and an unwinding direction about the winding drum longitudinal axis the line and/or line guide device can be wound on to and unwound from the winding drum, wherein the torsion spring engages the winding drum in order upon rotation of the winding drum in the unwinding direction thereof to exert a return force on the winding drum for rotation thereof in the winding-on direction, wherein the torsion spring, upon rotation of the winding drum in the unwinding direction, is subjected to torsional stress and by virtue of the torsional stress exerts a torque on the winding drum for rotation thereof in the winding-on direction and the torsional stress exerts the return force on the winding drum.

3 . The torsion spring according to claim 2 , wherein the torsion spring has a longitudinal axis about which the torsion spring is twistingly rotated upon rotation of the winding drum in the winding-on direction and the torsion spring longitudinal axis is arranged parallel or coaxially to the winding drum longitudinal axis.

4 . The torsion spring according to claim 2 , wherein the torsion spring is coupled with an end region to the winding drum or wherein the torsion spring is coupled with an end region to the winding drum in directly torque-transmitting relationship.

5 . The torsion spring according to claim 2 , wherein the line and/or the line guide device has a second end region which is coupleable to an entrainment member of an apparatus, the entrainment member being moveable relative to the winding drum, or wherein the fixing means of the second end region of the line and/or the line guide device couple to an entrainment member of an apparatus, that is moveable relative to the winding drum.

6 . The torsion spring according to claim 2 , wherein the torsion spring at least substantially or completely comprises organic plastic material and/or organic elastomer.

7 . The torsion spring according to claim 2 , wherein the winding drum is rotatable about the winding drum longitudinal axis by ≥1 revolution with torsional stressing of the torsion spring.

8 . An apparatus comprising a winding drum according to claim 2 .

9 . The torsion spring according to claim 1 , 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.

10 . The torsion spring according to claim 1 , wherein the torsion spring has a torsion spring longitudinal axis, and
wherein (i) the at least one elastically stretchable spring element is coupled radially spaced from the torsion spring longitudinal axis to the first segment and/or the second segment, or (ii) the at least one elastically stretchable spring element couples radially spaced from the torsion spring longitudinal axis to the first segment and/or the second segment and at least one further segment arranged between the first segment and the second segment.

11 . The torsion spring according to claim 10 , wherein (i) the at least one elastically stretchable spring element is arranged in a region of an outer periphery of the first segment and/or the second segment, or (ii) the at least one elastically stretchable spring element is arranged in a region of an outer periphery of the first and/or the second segment and at least one further segment arranged between the first and second segments.

12 . The torsion spring according to claim 1 , wherein at least one further segment is arranged between the first segment and the second segment in a longitudinal direction of the elongated main body longitudinal axis and has a holding region for the at least one elastically stretchable spring element.

13 . The torsion spring according to claim 12 , wherein the at least one elastically stretchable spring element is held variably in length in the holding region upon rotation of adjacent segments relative to each other.

14 . The torsion spring according to claim 1 , wherein the first segment and the second segment each has a holding region of groove-shaped configuration for the at least one elastically stretchable spring element, in which the at least one elastically stretchable spring element is arranged with a region thereof.

15 . The torsion spring according to claim 1 , wherein a plurality of elastically stretchable spring elements are arranged on the elongated main body distributed in a peripheral direction of the main body.

16 . The torsion spring according to claim 1 , wherein with elastic stretching of the at least one elastically stretchable spring element, the first segment and the second segment are rotatable relative to each other by ≥1 revolution about the longitudinal axis of the elongated main body.

17 . The torsion spring according to claim 1 , wherein the material of the at least one elastically stretchable spring element has an elongation at break of at least 150%.

18 . The torsion spring according to claim 1 , wherein the

Assignees

• Igus Gmbh

Inventors

• Hoffmann Jan

Classifications

• H02G11/02 Primary

  using take-up reel or drum · CPC title

• F03G1/026

  using torsion springs · CPC title

• B65H75/4449

  Arrangements or adaptations to avoid movable contacts or rotary couplings, e.g. by the use of an expansion chamber for a lenght of the cord or hose · CPC title

• B65H75/486 Primary

  Arrangements or adaptations of the spring motor · CPC title

• F16G13/16

  with arrangements for holding electric cables, hoses, or the like · CPC title