# US 11,114,915 B2 · Integrated rotor yoke

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- Number: US 11,114,915 B2
- Document ID: US11114915B2
- Status: Granted
- Kind: B2
- Application number: 16/587,088
- Filed: 2019-09-30
- Published: 2020-04-09
- Granted: 2021-09-07
- Earliest claimed: 2018-10-04
- Assignees: ZF Active Safety US Inc.
- Applicants: ZF Active Safety US Inc.
- Inventors: Irfan Bhatti
- Web page: https://patentgrep.com/patent/US11114915B2

## CPC

- H02K 1/278: Surface mounted magnets; Inset magnets
- H02K 1/27: Rotor cores with permanent magnets
- H02K 5/02: Casings or enclosures characterised by the material thereof
- H02K 5/04: Casings or enclosures characterised by the shape, form or construction thereof
- H02K 7/003: {Couplings; Details of shafts (means for mounting rotors on shafts H02K1/28)}
- H02K 11/215: Magnetic effect devices, e.g. Hall-effect or magneto-resistive elements
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

A rotor yoke includes a casing attachment ring, a sensor ring, and an over-molded body disposed between the casing attachment ring and the sensor ring. The over-molded body couples the sensor ring to the casing attachment mechanism.

## Claims

### Claim 1

A rotor yoke comprising:
a casing attachment ring configured to connect the rotor yoke to one of a magnet casing or a magnet carrier of a motor connected to an output shaft of the motor so that the rotor yoke is spaced from the output shaft;
a sensor ring axially spaced from the casing attachment ring; and
an over-molded body axially extending between the casing attachment ring and the sensor ring;
wherein the over-molded body couples the sensor ring to the casing attachment ring so that the casing attachment ring connects the sensor ring to the one of the magnet casing or magnet carrier.

### Claim 2 (depends on 1)

The rotor yoke according to claim 1 wherein the over-molded body has at least one radially extending protrusion on a radially outer surface of the over-molded body and the at least one protrusion is configured to balance the rotor yoke.

### Claim 3 (depends on 2)

The rotor yoke according to claim 2 wherein the at least one protrusion is removable from the over-molded body.

### Claim 4 (depends on 2)

The rotor yoke according to claim 2 wherein a plurality of protrusions is defined on the radially outer surface of the over-molded body.

### Claim 5

A rotor assembly comprising:
a sensor ring;
a casing attachment ring axially spaced from the sensor ring;
an over-molded body axially extending between the sensor ring and the casing attachment ring; and
a magnet casing affixed to the casing attachment ring, the magnet casing being configured to be connected to an output shaft of a motor so that the sensor ring, the casing attachment ring and over-molded body are spaced from the output shaft;
wherein the over-molded body is configured to couple the sensor ring to the casing attachment ring so that the casing attachment ring connects the sensor ring to the one of the magnet casing or magnet carrier.

### Claim 6 (depends on 5)

The rotor assembly according to claim 5, further comprising at least one removable protrusion on a radially outer surface of the over-molded body configured to balance the rotor.

### Claim 7 (depends on 6)

The rotor assembly according to claim 6, further wherein the over-molded body includes a plurality of removable protrusions defined in a spiral arrangement on the radially outer surface of the over-molded body and the plurality of removable protrusions are configured to balance the rotor.

### Claim 8 (depends on 4)

The rotor assembly according to claim 4, wherein the plurality of protrusions have a spiral arrangement on the radially outer surface of the over-molded body.