# US 2014/0153856 A1 · Ac generator for vehicle

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- Number: US 2014/0153856 A1
- Document ID: US20140153856A1
- Status: Published application
- Kind: A1
- Application number: 14/131,850
- Filed: 2011-10-19
- Published: 2014-06-05
- Earliest claimed: 2011-10-19
- Assignees: Mitsubishi Electric Corporation
- Inventors: Tomoki Takahashi; Hideyuki Hayashi
- Web page: https://patentgrep.com/patent/US20140153856A1

## CPC

- F16C 35/07: Fixing them on the shaft or housing with interposition of an element
- H02K 7/1004: {with pulleys}
- F16C 35/067: Fixing them in a housing (with interposition of an element F16C35/07)
- H02K 5/1732: {radially supporting the rotary shaft at both ends of the rotor (H02K5/1737 takes precedence)}
- H02K 7/08: Structural association with bearings
- F16C 19/06: with a single row or balls
- F16C 33/768: {between relatively stationary parts, i.e. static seals}
- F16C 2226/60: with threaded parts, e.g. bolt and nut connections
- F16C 2380/26: Dynamo-electric machines or combinations therewith, e.g. electro-motors and generators
- F16C: SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})

## Abstract

In An AC generator for a vehicle in which a bearing is inserted into a bearing box formed in a bracket and the bearing is fixed and retained by a retainer, the retainer (8, 10) has a cylindrical shape and a threaded portion (81, 101) is formed on the cylindrical section thereof, a threaded portion (111, 112) is formed on the bearing box, and the threaded portion of the retainer is directly screwed to the threaded portion of the bearing box in order to fix and retain the bearing (3), so that the gap between the outer circumference surface of the bearing box or the outer circumference surface of the retainer and the opposing side of a cooling fan is made uniform.

## Claims

### Claim 1

An AC generator for a vehicle in which a bearing is inserted into a bearing box formed in a bracket and the bearing is fixed and retained by a retainer, wherein the retainer has a cylindrical shape and a threaded portion is formed on the cylindrical section thereof, a threaded portion is formed on the bearing box, and the threaded portion of the retainer is directly screwed to the threaded portion of the bearing box in order to fix and retain the bearing, so that the gap between the outer circumference surface of the bearing box or the outer circumference surface of the retainer and the opposing side of a cooling fan is made uniform.

### Claim 2 (depends on 1)

The AC generator for a vehicle according to claim 1, wherein a male thread is formed on the outer circumference of the cylindrical section of the retainer and a screwing portion for pivoting a screw is formed on the inner circumference portion of the retainer, and a female thread is formed on the inner circumference of the bearing box.

### Claim 3 (depends on 1)

The AC generator for a vehicle according to claim 1, wherein a female thread is formed on the inner circumference of the cylindrical section of the retainer and a screwing portion for pivoting a screw is formed on the inner circumference portion of the retainer, and a male thread is formed on the outer circumference of the bearing box.

### Claim 4 (depends on 2)

The AC generator for a vehicle according to claim 2, wherein the screwing portion of the retainer has a hexagonal shape.

### Claim 5 (depends on 3)

The AC generator for a vehicle according to claim 3, wherein the screwing portion of the retainer has a hexagonal shape.

### Claim 6 (depends on 1)

The AC generator for a vehicle according to claim 1, wherein the retainer is disposed at a portion thereof opposing to the inner circumference of the cooling fan.

### Claim 7 (depends on 3)

The AC generator for a vehicle according to claim 3, wherein a sealing material is provided at the screwing portion between the retainer and the bearing box.

### Claim 8 (depends on 7)

The AC generator for a vehicle according to claim 7, wherein the sealing material is formed of rubber.