Emotor rotor centering and shipping aid with annular disk and bolt holes

Patent metadata

Field	Value
Publication number	US-12341402-B2
Application number	US-202217875522-A
Country	US
Kind code	B2
Filing date	Jul 28, 2022
Priority date	Jan 20, 2022
Publication date	Jun 24, 2025
Grant date	Jun 24, 2025

Abstract

A shipping jig for an e-motor includes a central axis, an annular disk arranged for fixing to a cover of the e-motor, and a cylindrical portion extending axially from the annular disk and arranged for axially and radially positioning a rotor carrier of the e-motor relative to a stator of the e-motor. The annular disk includes a first plurality of holes distributed about a first bolt circle and a second plurality of holes distributed about a second bolt circle, smaller than the first bolt circle. The cylindrical portion may also be arranged for radially positioning a portion of a resolver relative to the stator. The first plurality of holes may each have a same third diameter and the second plurality of holes may each have a same fourth diameter, greater than the same third diameter.

First claim

What is claimed is:

1. A shipping jig for an e-motor, comprising:
a central axis;
an annular disk arranged for fixing to a cover of the e-motor, comprising:
a first plurality of holes distributed about a first bolt circle; and
a second plurality of holes distributed about a second bolt circle, smaller than the first bolt circle;

a cylindrical portion extending axially from the annular disk and arranged for axially and radially positioning a rotor carrier of the e-motor relative to a stator of the e-motor; and
a spring element arranged for axially pressing a radially inwardly extending portion of the rotor carrier towards a housing of the e-motor.

2. The shipping jig of claim 1 wherein the cylindrical portion is also arranged for radially positioning a portion of a resolver relative to the stator.

3. The shipping jig of claim 1 wherein:
the first plurality of holes each comprise a same third diameter; and
the second plurality of holes each comprise a same fourth diameter, greater than the same third diameter.

4. The shipping jig of claim 1 wherein:
the cylindrical portion comprises a groove; and
the shipping jig further comprises a snap ring installed in the groove for compressing the spring element against the radially inwardly extending portion.

5. An e-motor assembly comprising:
a central axis;
a housing comprising a radial wall;
a stator fixed in the housing;
a rotor arranged radially inside of the stator, the rotor comprising a rotor carrier;
a cover fixed to the housing such that the rotor carrier is arranged between the radial wall and the cover;
a shipping jig comprising:
an annular disk comprising:
a first plurality of holes distributed about a first bolt circle, the first plurality of holes each comprising a same third diameter; and
a second plurality of holes distributed about a second bolt circle, smaller than the first bolt circle, the second plurality of holes each comprising a same fourth diameter, greater than the same third diameter; and

a cylindrical portion extending axially from the annular disk for axially and radially positioning the rotor carrier relative to the stator; and

a plurality of fasteners installed in the first plurality of holes to fix the annular disk to the cover, wherein the rotor carrier comprises a third plurality of holes distributed about the second bolt circle and arranged for fixing the rotor carrier to a crankshaft of a combustion engine.

6. The e-motor assembly of claim 5 further comprising a resolver, wherein the cylindrical portion also radially positions a portion of the resolver relative to the stator.

7. The e-motor assembly of claim 5 further comprising a lip seal fixed in the housing for sealing the housing to the rotor carrier.

8. The e-motor assembly of claim 5 wherein a number of holes in the third plurality of holes is greater than a number of holes in the second plurality of holes.

9. The e-motor assembly of claim 8 wherein the same fourth diameter is sized for receiving a tool for tightening a second plurality of fasteners in the third plurality of holes to fix the rotor carrier to the crankshaft.

10. The e-motor assembly of claim 5 wherein the shipping jig further comprises a spring element that axially presses the rotor carrier towards the radial wall.

11. The e-motor assembly of claim 10 further comprising an anti-wear disk disposed axially between the rotor carrier and the radial wall.

12. The e-motor assembly of claim 10 wherein:
the rotor carrier comprises a radially inwardly extending ring; and
the spring element presses against the radially inwardly extending ring.

13. The e-motor assembly of claim 12 wherein:
the cylindrical portion comprises a groove; and
the shipping jig further comprises a snap ring installed in the groove for compressing the spring element against the radially inwardly extending ring.

14. An e-motor assembly comprising:
a central axis;
a housing comprising a radial wall;
a stator fixed in the housing;
a rotor arranged radially inside of the stator, the rotor comprising a rotor carrier;
a cover fixed to the housing such that the rotor carrier is arranged between the radial wall and the cover;
an anti-wear disk disposed axially between the rotor carrier and the radial wall
a shipping jig comprising:
an annular disk comprising:
a first plurality of holes distributed about a first bolt circle; and
a second plurality of holes distributed about a second bolt circle, smaller than the first bolt circle; and

a cylindrical portion extending axially from the annular disk for axially and radially positioning the rotor carrier relative to the stator; and

a plurality of fasteners installed in the first plurality of holes to fix the annular disk to the cover.

Assignees

• Schaeffler Technologies Ag

Inventors

• Ramsey John
• Condo Michael
• Hartzler Kolstin

Classifications

• H02K24/00

  Machines adapted for the instantaneous transmission or reception of the angular displacement of rotating parts, e.g. synchro, selsyn · CPC title

• B65D85/68

  for machines, engines or vehicles in assembled or dismantled form · CPC title

• B65D2585/6877

  engines or motors · CPC title

• H02K5/10

  with arrangements for protection from ingress, e.g. water or fingers · CPC title

• H02K15/00

  Processes or apparatus specially adapted for manufacturing, assembling, maintaining or repairing of dynamo-electric machines · CPC title