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DE-102024132808-A1 - Cable pull encoder arrangement

DE102024132808A1DE 102024132808 A1DE102024132808 A1DE 102024132808A1DE-102024132808-A1

Abstract

The invention relates to a cable-operated encoder arrangement (2) for detecting linear distances with a housing arrangement (4) in which at least one rotatably mounted cable drum (12) for a cable (14), a spring arrangement (18) for pretensioning the cable drum (12) and a cable guide arrangement (26) with a cable guide element (38) in a cable exit opening (36) are provided, wherein a sensor arrangement (46) is operatively connected to the cable drum (12), wherein the sensor arrangement (46) is provided in the housing arrangement (4).

Inventors

  • Martin Forthaus
  • Konrad Machill

Assignees

  • FRABA B.V.

Dates

Publication Date
20260513
Application Date
20241111

Claims (8)

  1. Cable pull sensor arrangement (2) for detecting linear distances with a housing arrangement (4) in which at least one rotatably mounted cable drum (12) for a cable (14), a spring arrangement (18) for pretensioning the cable drum (12) and a cable guide arrangement (26) with a cable guide element (38) in a cable exit opening (36) are provided, wherein a sensor arrangement (46) is in operative connection with the cable drum (12), characterized in that the sensor arrangement (46) is provided in the housing arrangement (4).
  2. Cable pull encoder arrangement according to Claim 1 , characterized in that the sensor arrangement (46) is a rotary encoder.
  3. Cable pull encoder arrangement according to Claim 1 or 2 , characterized in that the housing arrangement (4) comprises three housing parts (6, 8, 10), a cable drum housing part (6), a sensor housing part (8) and a cover part (10), wherein at least the cable drum housing part (6) and the sensor housing part (8) are connected to each other by riveting elements (32, 34), wherein roller elements (28) for guiding the cable (14) are provided on three riveting elements (32) as part of the cable guidance arrangement (36).
  4. Cable pull encoder arrangement according to Claim 3 , characterized in that sleeves (30) for bearing the rolling elements (28) are provided on the riveting elements (32).
  5. Cable pull sensor arrangement according to one of the preceding claims, characterized in that a Gore-Tex membrane is provided in the sensor housing part (8).
  6. Cable pull encoder arrangement according to one of the preceding claims, characterized in that a spring winding element (20) operable via an outside of the cable drum housing part (6) is pre-tensioned and positively locked in the cable drum housing part (6).
  7. Cable pull encoder arrangement according to one of the preceding claims, characterized in that the cable drum housing part (6) in the pre-assembly state has an open housing section (40) which forms the cable exit opening (36) in which the cable guide element (38) is to be arranged.
  8. Cable pull encoder arrangement according to Claim 7 , characterized in that the rope guide element (38) is mounted in a slidable manner in the rope exit opening (36).

Description

The invention relates to a cable-operated encoder arrangement for detecting linear distances with a housing arrangement in which at least one rotatably mounted cable drum for a cable, a spring arrangement for pretensioning the cable drum and a cable guide arrangement with a cable guide element in a cable exit opening are provided, wherein a sensor arrangement is in operative connection with the cable drum. Cable-operated encoder arrangements are well known from the prior art. They serve to detect linear displacements of connected components, whereby a spring-loaded cable is moved from the housing arrangement and the distance traveled is detected by means of a sensor arrangement. A generic cable-operated encoder arrangement is described in the German utility model. DE 10 2013 105 959 U1 known. Here, the housing arrangement is very compact and the sensor arrangement is provided on one housing part, which, however, makes it susceptible to shocks, damage, etc. The object of the invention is therefore to avoid the aforementioned disadvantage in a simple and cost-effective way. This problem is solved by integrating the sensor assembly into the housing. This results in an extremely compact cable-operated encoder assembly whose sensor assembly is protected from external influences. The sensor arrangement is a rotary encoder, which is particularly advantageous. The housing assembly comprises three housing parts: a cable drum housing part, a sensor housing part, and a cover part. At least the cable drum housing part and the sensor housing part are connected to each other by rivets. Roller elements for guiding the cable are provided on three of the rivets as part of the cable guide assembly. This ensures reliable cable guidance, and the rivets connecting the cable drum housing part and the sensor housing part do not require any additional installation space. It is particularly advantageous if sleeves for mounting the roller elements are provided on the rivets to prevent compression or buckling and thus damage to the cable guide assembly during assembly or operation. Because a Gore-Tex membrane is provided in the sensor housing part, no moisture can condense in the sensor housing part. A spring-loaded winding element, operable from the outside of the cable drum housing, is advantageously pre-tensioned and positively mounted within the cable drum housing. This makes it particularly easy to pre-tension the spring assembly when the cable pull sensor assembly is mounted. To allow for flexible alignment of the rope feeder assembly on a component, the rope drum housing section in its pre-assembled state has an open housing section that forms the rope exit opening, in which the rope guide is to be positioned. This makes it possible to use different rope guides for different rope thicknesses or even different rope materials. It is particularly advantageous if the rope guide is slidably mounted in the rope exit opening. The invention is explained in more detail below with reference to a drawing, in which the single figure shows an exploded view of the cable pull encoder arrangement according to the invention. The single figure shows an exploded view of a cable-pull sensor arrangement 2 according to the invention. The cable-pull sensor arrangement 2 comprises a housing arrangement 4, which in the present embodiment has three housing parts 6, 8, 10, namely a cable drum housing part 6, a sensor housing part 8, and a cover part 10. A cable drum 12 for a cable 14 is rotatably mounted in the cable drum housing part 6. To pretension the cable drum 12 and thus the cable 14, a spring arrangement 18 is provided in a known manner between the cable drum 12 and a base surface 16 of the cable drum housing part 6. The spring arrangement 18 is fixedly mounted on a spring winding element 20. The spring winding element 20 has a hexagonal flange part 22, with which it is positively locked in a corresponding hexagonal recess 24 in the base part 16 of the cable drum housing part 6 during operation and is secured by a screw 25. In the pre-assembled state, the spring winding element 20 can be pushed out of the hexagonal recess 24 and rotated with a suitable tool so that the spring assembly 18 is pre-tensioned relative to the cable drum 12. The cable 14 is wound onto and off the cable drum 12 in a known manner. For an orderly winding process, a rope guide arrangement 26 is provided for the rope 14. Here, the rope is rotatably guided on three roller elements 28, of which only two are visible. The roller elements 28 are axially displaceable and mounted on sleeves 30, which in turn are slid onto rivet elements 32 and are located entirely within the cable drum housing part 6. The three rivet elements 32, as well as a further rivet element 34, also serve to fasten the sensor housing part 8 to the cable drum housing part 6. In addition to the roller elements 28, a cable guide element 38 is provided in a cable exit opening 36 as part of the cable guide assem