Assembly comprising a component rotatable about a rotary axis for an actuating drive, and a sensor element attached to the rotatable component
The disclosure relates to an assembly comprising a component rotatable about a rotary axis for an actuating drive comprising a sensor element attached to the rotatable component. The rotatable component has a support surface from which a fixing element protrudes in parallel to the rotary axis. The sensor element includes an opening. The sensor element is arranged on the support surface in such a manner that the fixing element penetrates the opening. A surface of the sensor element adjacent to the opening has a structure. A top portion of the fixing element is in interlocking engagement with the structure so that the attached sensor element is connected to the component in a torque-resistant manner.
1. An actuating drive, comprising:
an electric motor;
an assembly comprising:
a gear rotatable about a rotary axis having a support surface and a fixing element protruding from said support surface parallel to said rotary axis, and
a magnet attached to the gear, having an opening and a surface adjacent to said opening, wherein said surface has a structure,
wherein the magnet is arranged on the support surface in such a manner that the fixing element penetrates the opening, and a top portion of the fixing element is in interlocking engagement with the structure so that the magnet is attached to the gear in a torque-resistant manner; and
a Hall sensor adapted to obtain information on an azimuthal angle position of the gear.
2. The actuating drive according to claim 1 , wherein the gear is integrally formed with a hollow shaft and the magnet is arranged within the hollow shaft.
3. The actuating drive according to claim 2 , wherein the magnet is arranged in a first axial portion of the hollow shaft and wherein the hollow shaft comprises a second axial portion for coupling to an actuating element.
4. The actuating drive according to claim 1 , wherein the structure of the surface adjacent to the opening of the magnet further comprises a recess which does not have a continuous rotation symmetry about the rotary axis which interlocking engages the top portion of the fixing element.
5. The actuating drive according to claim 4 , where in the recess comprises one or more blind holes to further engage the top portion of the fixing element.
6. The actuating drive according to claim 4 , wherein the recess comprises one or more grooves to further engage the top portion of the fixing element.
7. The actuating drive according to claim 1 , wherein the opening of the magnet has a circular cross-section.
8. The actuating drive according to claim 1 , wherein the gear further comprises a locating surface that is inclined with respect to the support surface and in contact with the magnet so as to improve aid the positioning of the magnet on the support surface.
9. The actuating drive according to claim 1 , wherein the magnet is diametrically magnetized.
10. The actuating drive according to claim 1 , wherein the magnet is a rare-earth magnet.
11. The actuating drive according to claim 10 , wherein the magnet is a neodymium-iron-boron magnet.