Measuring cable travel sensor
AssigneeASM Automation Sensorik Messtechnik GmbH
InventorKlaus-Manfred Steinich
Life of this patent
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Abstract
A measuring cable travel sensor comprises a housing accommodating a measuring cable drum and a rotary spring operable to urge the cable drum in the direction of winding thereon a measuring cable. A rotary angle sensor is mounted to the housing on the outside thereof. The rotary angle sensor has a sensor shaft with a projecting end trunnion portion. The cable drum is fixed on the sensor shaft trunnion portion non-rotatably in concentric relationship thereon. The travel sensor is of a compact structure, in particular in its axial direction, and simple and inexpensive to produce.
Claims25
A measuring cable travel sensor comprising
- a housing,
- a cable drum,
- means rotatably mounting the cable drum in the housing,
- a measuring cable adapted to be wound on to and unwound from the cable drum upon rotational movement thereof,
- a spring engaging the cable drum and operable to urge it in the winding-on direction, and
- a rotary angle sensor connected to the housing,
- the sensor including a trunnion portion projecting from the sensor and having an axial lengthwise region,
- the cable drum being fixed in non-rotational concentric aligned relationship on the trunnion portion of the sensor, the cable drum being fixed in the axial lengthwise region of the trunnion portion, the sensor closely fitting to an outside surface of the housing.
A measuring cable travel sensor comprising
- a housing,
- a cable drum,
- means rotatably mounting the cable drum in the housing,
- a measuring cable adapted to be wound on to and unwound from the cable drum upon rotational movement thereof,
- a spring engaging the cable drum and operable to urge it in the winding-on direction, and
- a rotary angle sensor connected to the housing,
- the sensor including a trunnion portion projecting from the sensor and having an axial lengthwise region,
- the cable drum being fixed in non-rotational concentric aligned relationship on the trunnion portion of the sensor, the cable drum being fixed in an axial lengthwise region of the trunnion portion,
- the housing comprises only two substantially cup-shaped shell portions comprising a first shell portion accommodating the spring and a second shell portion on which the rotary angle sensor is fixed externally thereof, and
- the second shell portion having an end plate portion against an outside surface of which the rotary angle sensor closely fits.
Dependencies are inferred from the claim text.