Capacitive rotation sensor

A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising a shaft (3) rotatably supported in a housing flange (1), said shaft (3) being connected integral in rotation therewith to a rotor (5, 6) to which, separated by an air gap (19) a stator (8) situated opposite thereto is assigned, wherein at least the rotor (5, 6), the stator (8) and an evaluation circuit (28) are enclosed by an electrically conductive cap, wherein a stator surface (37) is arranged on the underside of a circuit board (8) and the stator surface (37) has assigned thereto, situated opposite thereto and separated by the air gap (19), a non-rotation-symmetrical rotor disc (6) which, in turn, is fixed on a rotor support (5), said rotor support (5) being fastened highly precisely on the outer periphery of the shaft (3) so as to be integral in rotation therewith, wherein the rotor support (5) is designed as a simple, cost-effective plastic part that is fitted highly precisely and in a form-fitting manner onto the outer periphery of the shaft (3).

A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising:

• a shaft (3) rotatably supported in a housing flange (1), said shaft (3) being connected integral in rotation therewith to a rotor (5, 6) to which, separated by an air gap (19), a stator (8) situated opposite thereto is assigned, wherein at least the rotor (5, 6), the stator (8) and an evaluation circuit (28) are enclosed by an electrically conductive cap, a stator surface (37) is arranged on the underside of a circuit board (8) and the stator surface (37) has assigned thereto, situated opposite thereto and separated by the air gap (19), a non-rotation-symmetrical rotor disc (6) which, in turn, is fixed on a rotor support (5), said rotor support (5) being fastened highly precisely on the outer periphery of the shaft (3) so as to be integral in rotation therewith, and a recess (30) that is open on one side and disposed on the rotor support (5), in which the eccentric rotor disc (6) is inserted, wherein the rotor disc (6) is fixed adhesively in the recess (30).

A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising a shaft (3) rotatably supported in a housing flange (1), said shaft (3) being connected integral in rotation therewith to a rotor (5, 6) to which, separated by an air gap (19), a stator (8) situated opposite thereto is assigned, wherein at least the rotor (5, 6), the stator (8) and an evaluation circuit (28) are enclosed by an electrically conductive cap, a stator surface (37) is arranged on the underside of a circuit board (8) and the stator surface (37) has assigned thereto, situated opposite thereto and separated by the air gap (19), a non-rotation-symmetrical rotor disc (6) which, in turn, is fixed on a rotor support (5), said rotor support (5) being fastened highly precisely on the outer periphery of the shaft (3) so as to be integral in rotation therewith, wherein the rotor support (5) is fixed unstressed on the outer periphery of the shaft (3) in a form-fitting manner and integral in rotation therewith.

A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising a shaft (3) rotatably supported in a housing flange (1), said shaft (3) being connected integral in rotation therewith to a rotor (5, 6) to which, separated by an air gap (19) a stator (8) situated opposite thereto is assigned, wherein at least the rotor (5, 6), the stator (8) and an evaluation circuit (28) are enclosed by an electrically conductive cap, wherein a stator surface (37) is arranged on the underside of a circuit board (8) and the stator surface (37) has assigned thereto, situated opposite thereto and separated by the air gap (19), a non-rotation-symmetrical rotor disc (6) which, in turn, is fixed on a rotor support (5), said rotor support (5) being fastened highly precisely on the outer periphery of the shaft (3) so as to be integral in rotation therewith, and a dentition (22) provided on the outer periphery of the shaft (3), and the rotor support (5) has on its inner periphery a corresponding dentition, such that a rotationally integral and form-fitting connection between the rotor support and the outer periphery of the shaft is provided.

A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising a shaft (3) rotatably supported in a housing flange (1), said shaft (3) being connected integral in rotation therewith to a rotor (5, 6) to which, separated by an air gap (19) a stator (8) situated opposite thereto is assigned, wherein at least the rotor (5, 6), the stator (8) and an evaluation circuit (28) are enclosed by an electrically conductive cap, a stator surface (37) is arranged on the underside of a circuit board (8) and the stator surface (37) has assigned thereto, situated opposite thereto and separated by the air gap (19), a non-rotation-symmetrical rotor disc (6) which, in turn, is fixed on a rotor support (5), said rotor support (5) being fastened highly precisely on the outer periphery of the shaft (3) so as to be integral in rotation therewith, wherein the rotor support (5) consists of a plastic material and is injection-molded directly onto the outer periphery of the metal shaft (3).

A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising a shaft (3) rotatably supported in a housing flange (1), said shaft (3) being connected integral in rotation therewith to a rotor (5, 6) to which, separated by an air gap (19) a stator (8) situated opposite thereto is assigned, wherein at least the rotor (5, 6), the stator (8) and an evaluation circuit (28) are enclosed by an electrically conductive cap, wherein a stator surface (37) is arranged on the underside of a circuit board (8) and the stator surface (37) has assigned thereto, situated opposite thereto and separated by the air gap (19), a non-rotation-symmetrical rotor disc (6) which, in turn, is fixed on a rotor support (5), said rotor support (5) being fastened highly precisely on the outer periphery of the shaft (3) so as to be integral in rotation therewith, wherein the outer periphery of the housing flange (1) serves as a centering surface for the inner periphery of the cap (9) placed thereupon and that the cap (9) transfers this centric dimension to an axially inwardly situated annular flange (14) at the lower front face of which a bevel (16) is provided, against which the inner periphery of the circuit board (8) fits highly precisely with the aid of a mating surface (17) in order to thus be highly precisely centered in the housing.

A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising a shaft (3) rotatably supported in a housing flange (1), said shaft (3) being connected integral in rotation therewith to a rotor (5, 6) to which, separated by an air gap (19), a stator (8) situated opposite thereto is assigned, wherein at least the rotor (5, 6), the stator (8) and an evaluation circuit (28) are enclosed by an electrically conductive cap, a stator surface (37) is arranged on the underside of a circuit board (8) and the stator surface (37) has assigned thereto, situated opposite thereto and separated by the air gap (19), a non-rotation-symmetrical rotor disc (6) which, in turn, is fixed on a rotor support (5), said rotor support (5) being fastened highly precisely on the outer periphery of the shaft (3) so as to be integral in rotation therewith, wherein the cap (9) comprises an outer vertical flange (26) that fits uniformly as an annular flange against the outer periphery of the housing flange (1) in the region of a mating surface (25) and this fit is transferred via the vertical flange (26) to the horizontal flange (27) of the cap (9) and from there to an inner annular flange (14) of the cap (9) that centers the circuit board (8).

A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising a shaft (3) rotatably supported in a housing flange (1), said shaft (3) being connected integral in rotation therewith to a rotor (5, 6) to which, separated by an air gap (19), a stator (8) situated opposite thereto is assigned, wherein at least the rotor (5, 6), the stator (8) and an evaluation circuit (28) are enclosed by an electrically conductive cap, a stator surface (37) is arranged on the underside of a circuit board (8) and the stator surface (37) has assigned thereto, situated opposite thereto and separated by the air gap (19), a non-rotation-symmetrical rotor disc (6) which, in turn, is fixed on a rotor support (5), said rotor support (5) being fastened highly precisely on the outer periphery of the shaft (3) so as to be integral in rotation therewith, wherein the rotor support (5) is rotatably supported in a recess (20) of the housing flange (1) and centered with the aid of a knurled mating surface (21) on the outer periphery of the shaft (3).

A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising a shaft (3) rotatably supported in a housing flange (1), said shaft (3) being connected integral in rotation therewith to a rotor (5, 6) to which, separated by an air gap (19), a stator (8) situated opposite thereto is assigned, wherein at least the rotor (5, 6), the stator (8) and an evaluation circuit (28) are enclosed by an electrically conductive cap, a stator surface (37) is arranged on the underside of a circuit board (8) and the stator surface (37) has assigned thereto, situated opposite thereto and separated by the air gap (19), a non-rotation-symmetrical rotor disc (6) which, in turn, is fixed on a rotor support (5), said rotor support (5) being fastened highly precisely on the outer periphery of the shaft (3) so as to be integral in rotation therewith, wherein, in the region of the center bore (31) of the rotor support (5) an upper adhesive surface (34) is provided designed in the form of a beveled surface, in the region of which an adhesive bead is provided in order to secure the rotor support (5) against falling off the shaft (3) upward in an axial direction.

A capacitive rotation sensor for detecting the position of an object moving relative to a stationary object, comprising a shaft (3) rotatably supported in a housing flange (1), said shaft (3) being connected integral in rotation therewith to a rotor (5, 6) to which, separated by an air gap (19), a stator (8) situated opposite thereto is assigned, wherein at least the rotor (5, 6), the stator (8) and an evaluation circuit (28) are enclosed by an electrically conductive cap, a stator surface (37) is arranged on the underside of a circuit board (8) and the stator surface (37) has assigned thereto, situated opposite thereto and separated by the air gap (19), a non-rotation-symmetrical rotor disc (6) which, in turn, is fixed on a rotor support (5), said rotor support (5) being fastened highly precisely on the outer periphery of the shaft (3) so as to be integral in rotation therewith, wherein a recess (32) is arranged eccentrically in the outer region of the rotor support (5) as a counterweight.