Strain relief, end fastening part having strain relief, and clamping part therefor

Patent metadata

Field	Value
Publication number	US-11227707-B2
Application number	US-201816494089-A
Country	US
Kind code	B2
Filing date	Mar 14, 2018
Priority date	Mar 14, 2017
Publication date	Jan 18, 2022
Grant date	Jan 18, 2022

Abstract

A tension relief for supply lines and a block-like clamping part therefor, which has a lateral surface designed as a clamping surface. The clamping surface of the clamping part is formed at least in one clamping portion by an elastic wall, which is delimited on the side facing away from the clamping surface by a cavity structure, which is formed by additional walls. The clamping part can be variedly used without modification on certain line diameters, in particular in a tension relief of a cable carrier or also in a connector housing.

First claim

What is claimed is:

1. A strain reliever for supply lines of a supply line device, comprising:
a clamping apparatus having at least one block-like clamping part which has a side surface configured as a clamping surface for clamping the supply lines in place in a clamping direction against a further clamping surface of the clamping apparatus, the strain reliever being designed for passage of the supply lines in a longitudinal direction perpendicular or approximately perpendicular to the clamping direction, wherein the clamping surface is formed, at least in a clamping portion intended for clamping the supply lines in place, by an elastic wall, wherein, on a side facing away from the clamping surface, the elastic wall bounds a cavity structure which extends through the clamping part in or approximately in the longitudinal direction, wherein a number of passage openings of the cavity structure adjoin one another via further inner elastic walls, wherein the clamping part has a transverse bracing, which extends over a main dimension and which is connected in one piece to a lattice-like arrangement, and wherein the lattice-like arrangement comprises walls arranged in pairs, wherein the walls in each pair have an interposed passage opening which has a cross-sectional shape which tapers to a point away from the elastic wall and the walls in each pair merge at an end region remote from the clamping surface in one piece into the transverse bracing.

2. The strain reliever as claimed in claim 1 , wherein the cavity structure is defined by one or more passage openings extending in the longitudinal direction, at least some of which are bounded by the elastic wall.

3. The strain reliever as claimed in claim 1 , wherein a wall thickness of the elastic wall or of the elastic walls is less than or equal to one third of an average diameter, less than or equal to one eighth of the average diameter or less than or equal to one tenth in each case of the average diameter of mutually adjoining passage openings.

4. The strain reliever as claimed in claim 1 , wherein at least the passage openings associated with the clamping surface are congruent, wherein the passage openings in each case have a shape of a right prism.

5. The strain reliever as claimed in claim 4 , wherein the passage openings have the shape of the right prism with an approximately triangular base area and with crests, wherein the triangle of the base area in one group of passage openings is arranged with one vertex pointing contrary to the clamping direction and in another group of passage openings with one vertex pointing in the clamping direction.

6. The strain reliever as claimed in claim 5 , wherein the passage openings of the one group are in each case bounded with the vertex pointing contrary to the clamping direction by the elastic wall having the clamping surface, wherein, with regard to a direction perpendicular to the longitudinal direction and clamping direction, the passage openings of the one group are arranged with regard to direction alternatingly to the passage openings of the other group and/or mutually aligned.

7. The strain reliever as claimed in claim 1 , wherein the passage openings are in a honeycomb-like arrangement in at least two mutually parallel rows.

8. The strain reliever as claimed in claim 1 , wherein transverse bracing which extends over a length of the clamping part and perpendicular to the longitudinal direction and clamping direction is provided in a central region with regard to the longitudinal direction and/or in that transverse bracing which extends over the length of the clamping part and in the clamping direction is provided in a central and/or end region with regard to a direction perpendicular to the longitudinal direction and clamping direction.

9. The strain reliever as claimed in claim 1 , wherein the clamping part has a further clamping surface which is arranged remote from the one clamping surface of the clamping part, wherein the clamping part is preferably of mirror-symmetrical construction to a main axis.

10. The strain reliever as claimed in claim 1 , wherein at least one further clamping part of identical construction is provided, wherein the two clamping parts are arranged in the installation position in the strain reliever with their clamping surfaces opposite one another.

11. The strain reliever as claimed in claim 2 , wherein the cavity structure has a plurality of at least eighteen passage openings bounded by elastic walls, wherein the passage openings are arranged in at least two rows which in each case extend in a transverse direction transversely of the longitudinal direction and transversely of the clamping direction and/or wherein the average diameter of the passage openings is less than 50% of the dimension of the clamping part in the clamping direction.

12. An end-fastening part for an energy chain having the strain reliever as claimed in claim 1 , wherein a number of clamping parts are held in a frame in an orientation with substantially perpendicular extending clamping surfaces.

13. The end-fastening part as claimed in claim 12 , wherein, for connection to the energy chain, the end-fastening part has a connection port, such as two side parts, in the case of a supply line device of chain links with side straps, two connecting side straps adapted to the side straps.

14. An energy chain having the strain reliever as claimed in 1 .

15. The strain reliever as claimed in claim 1 , wherein each pair of the walls arranged in pairs has opposing walls that have an opposing curvature with respect to each other.

16. A clamping part for the strain reliever, comprising:
the clamping part being produced in one piece from an elastic plastics material and having two opposing side surfaces each of which comprises a clamping surface for clamping at least one supply line in place in a clamping direction against a further clamping surface, for strain relief of the at least one supply line in a longitudinal direction perpendicular or approximately perpendicular to the clamping surface, wherein at least one side surface, preferably both side surfaces in each case has/have, at least in a region of the clamping surface intended for clamping the supply lines in place, a first elastic wall which bounds a cavity structure on a side facing away from the clamping surface, which structure is formed by a lattice-like arrangement of a number of further elastic walls which are connected in one piece to the first elastic wall, wherein the cavity structure has a number of passage openings which adjoin one another via the further elastic walls, wherein the clamping part has a transverse bracing, which extends over a main dimension and which is connected in one piece to the lattice-like arrangement, and wherein the lattice-like arrangement comprises walls arranged in pairs, wherein the walls in each pair have an interposed passage opening which has a cross-sectional shape which tapers to a point away from the elastic wall and the walls in each pair merge at an end region remote from the clamping surface in one piece into the transverse bracing.

17. The clamping part as claimed in claim 16 , wherein the clamping part is of mirror-symmetrical construction with regard to a main plane perpendicular to the clamping direction.

18. The clamping part as claimed in claim 16 , wherein the cavity structure has a plurality of passage openings extending in the longitudinal direction which extend at least predominantly or completely continuously in or approximately in the longitudinal direction through the clamping part, w

Assignees

• Igus Gmbh

Inventors

• Hermey Andreas
• Steeger Ralf
• Jaeker Thilo-Alexander
• Yilmaz Bilal

Classifications

• H02G3/22

  Installations of cables or lines through walls, floors or ceilings, e.g. into buildings · CPC title

• F16G13/16 Primary

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

• H01B17/12 Primary

  Special features of strain insulators · CPC title

• H02G11/006

  using extensible carrier for the cable, e.g. self-coiling spring (extensible conductors or cables H01B7/06) · CPC title

• H01R13/5837

  specially adapted for accommodating various sized cables (H01R13/5825 takes precedence) · CPC title