Actuator

• US 8,717,011 B2
• Filed: 06/06/2008
• Issued: 05/06/2014
• Est. Priority Date: 08/07/2007
• Status: Active Grant

• Current Assignee: Robert Bosch GmbH
• Original Assignee: Robert Bosch GmbH
• Inventors: Henning, Daniel
• Primary Examiner(s): Aurora, Reena
• Application Number:
  US12/672,189
• Publication Number:
  US 20110050212A1
• Time in Patent Office: 2,160 Days
• Field of Search: 324/207.25
• US Class Current: 324/207.25
• CPC Class Codes: G01D 5/145 influenced by the relative movement between the Hall device and magnetic fields see G01R33/06
• CPC Class Codes: Y10T 29/4998 Combined manufacture including applying or shaping of fluent material

Abstract

In the case of an actuator having a rotation angle sensor with a magnet, no satisfying solution has yet been found for the attachment of the magnet. The invention relates to an actuator having a rotation angle sensor, the magnet of the rotation angle sensor being provided with a plastic cover. The plastic cover and magnet may be easily connected to a first sensor part of the rotation angle sensor of the actuator. The actuator with the rotation angle sensor can particularly be used in motor vehicles.

Claims

1. An actuator with a rotation angle sensor, comprising:

a first sensor part equipped with a magnet having at least one indentation extending inwardly from an outer circumference of the magnet;

a second sensor part equipped with a magnetically sensitive element, the first sensor part and the second sensor part being configured to rotate in relation to each other in response to an actuating force; and

a plastic casing injection-molded at least partially around the magnet such that the plastic casing engages the at least one indentation to fixedly connect the plastic casing to the magnet and prevent rotation of the plastic casing relative to the magnet.

2. The actuator as recited in claim 1, wherein the plastic casing is at least partially open on at least one side.

3. The actuator as recited in claim 2, wherein together with the plastic casing, the magnet constitutes a separately manufacturable blank.

4. The actuator as recited in claim 3, wherein the plastic casing is connected to the first sensor part by means of an integrally joined connection.

5. The actuator as recited in claim 3, wherein the plastic casing is connected to the first sensor part by means of a form-locked connection.

6. The actuator as recited in claim 1, wherein the plastic casing is closed on all sides.

7. The actuator as recited in claim 1, wherein together with the plastic casing, the magnet constitutes a separately manufacturable blank.

8. The actuator as recited in claim 1, wherein the plastic casing is connected to the first sensor part by means of an integrally joined connection.

9. The actuator as recited in claim 8, wherein the plastic casing is connected to the first sensor part by means of a nonpositive, frictional connection.

10. The actuator as recited in claim 1, wherein the plastic casing is connected to the first sensor part by means of a form-locked connection.

11. The actuator as recited in claim 1, wherein the first sensor part is associated with a rotor and the second sensor part is associated with a stator.

12. The actuator as recited in claim 1, wherein the first sensor part is associated with a stator and the second sensor part is associated with a rotor.

13. The actuator as recited in claim 1, wherein the first sensor part is connected for co-rotation to a throttle element that controls a flow of a fluid.

14. The actuator as recited in claim 1 further comprising:

a manually actuated lever,

wherein the first sensor part is rotated by actuation of the manually actuated lever.

15. The actuator as recited in claim 1, wherein the plastic casing defines a first exterior surface on a side oriented toward the second sensor part, the magnet defines a second exterior surface on a side oriented toward the second sensor part, and the second exterior surface of the magnet is generally coplanar with the first exterior surface of the plastic casing.

16. A rotation angle sensor comprising:

a first sensor part equipped with a magnet having at least one indentation extending inwardly from an outer circumference of the magnet;

a second sensor part equipped with a magnetically sensitive element, the two sensor parts being configured to rotate in relation to each other in response to an actuating force; and

a plastic casing injection-molded at least partially around the magnet such that the plastic casing engages the at least one indentation to fixedly connect the plastic casing to the magnet and prevent rotation of the plastic casing relative to the magnet.

17. The rotation angle sensor as recited in claim 16, wherein the plastic casing defines a first exterior surface on a side oriented toward the second sensor part, the magnet defines a second exterior surface on a side oriented toward the second sensor part, and the second exterior surface of the magnet is generally coplanar with the first exterior surface of the plastic casing.