Rotary angle sensor

Patent metadata

Field	Value
Publication number	US-9945694-B2
Application number	US-201314411838-A
Country	US
Kind code	B2
Filing date	Jun 29, 2013
Priority date	Jul 4, 2012
Publication date	Apr 17, 2018
Grant date	Apr 17, 2018

Abstract

A rotary angle sensor used to determine a relative angular position as compared to a reference position, comprising a housing ( 1 ), at least one rotor ( 3, 4 ) that is rotatably mounted inside said housing ( 1 ), one circuit board ( 2 ) containing electrical and/or electronic components as well as one or multiple stators corresponding to the number of used rotors ( 3, 4 ). The rotary angle sensor is supposed to be improved in such a manner that a particularly precise alignment of the first rotor ( 3 ) in relation to the stator is ensured and that it is inexpensive to manufacture. This is achieved by a first rotor ( 3 ) that is interlocked with the housing ( 1 ) without any play while a pre-loaded spring washer ( 14 ) is positioned on the latching arms ( 11 ).

First claim

The invention claimed is:

1. A rotary angle sensor used to determine a relative angular position in relation to a reference position, said rotary angle sensor comprising:
at least one rotor including a holder on which the at least one rotor is mounted, the holder including a first side and a second side opposite the first side, said holder extending from the first side to the second side in a first direction, wherein the at least one rotor is mounted on the first side of the holder;
a housing on which the holder and a first of the at least one rotor are rotatably mounted;
a circuit board installed to the housing, the circuit board including electronic components and one or multiple stators corresponding to the available number of rotors;
at least one latching arm that extends from the first side of the holder away from the second side of the holder in a second direction opposite the first direction; and
a spring washer pretensioned against the at least one latching arm.

2. The rotary angle sensor of claim 1 , wherein at least one bearing segment of the first rotor is provided inside the housing between a latching nose of the housing and the at least one latching arm.

3. The rotary angle sensor of claim 2 , wherein at least one of the bearing segments is formed by correspondingly beveled surfaces on the first rotor and the housing.

4. The rotary angle sensor of claim 2 wherein the bearing segments are provided with a lubricant.

5. The rotary angle sensor of claim 1 wherein at least one of the housing and the components of the first rotor are made of plastic with a portion of embedded lubricant.

6. The rotary angle sensor of claim 1 wherein a holding ring is welded to free ends of the bearing segments.

Assignees

• Hella Kgaa Hueck & Co

Inventors

• Elpermann Thomas
• Peters Stefan

Classifications

• G01D5/20 Primary

  by varying inductance, e.g. by a movable armature · CPC title

• G01L3/02

  Rotary-transmission dynamometers · CPC title

• B62D15/0215 Primary

  by measuring on the steering column · CPC title

• G01D11/18

  Springs (G01D11/06 takes precedence) · CPC title

• B60R16/027 Primary

  between relatively movable parts of the vehicle, e.g. between steering wheel and column {(devices for measuring, signalling or controlling tyre pressure or temperature specially adapted for mounting on vehicles B60C23/00)} · CPC title