# US 2022/0286017 A1 · Electromagnetic Retarder and Assembly Comprising Such a Retarder

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- Number: US 2022/0286017 A1
- Document ID: US20220286017A1
- Status: Published application
- Kind: A1
- Application number: 17/672,209
- Filed: 2022-02-15
- Published: 2022-09-08
- Earliest claimed: 2021-03-02
- Assignees: Telma
- Applicants: Telma
- Inventors: Akafou Mbarek; Romuald Belance; Nicolas Quennet
- Web page: https://patentgrep.com/patent/US20220286017A1

## CPC

- H02K 7/106: with dynamo-electric brakes
- H02K 49/00: Dynamo-electric clutches; Dynamo-electric brakes
- 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)}
- B60L 7/28: Eddy-current braking
- H02K: DYNAMO-ELECTRIC MACHINES (dynamo-electric relays H01H53/00; conversion of DC or AC input power into surge output power {H03K3/53})
- B60L: PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES (arrangements or mounting of electrical propulsion units or of plural diverse prime-movers for mutual or common propulsion in vehicles B60K1/00, B60K6/20; arrangements or mounting of electrical gearing in vehicles B60K17/12, B60K17/14; preventing wheel slip by reducing power in rail vehicles B61C15/08; dynamo-electric machines H02K; control or regulation of electric motors H02P); SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES (electric coupling devices combined with mechanical couplings of vehicles B60D1/64; electric heating for vehicles B60H1/00); ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL (control or regulation of electric motors H02P); MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES

## Abstract

An assembly comprising a rotational driving mechanism of a drive shaft, and an electromagnetic retarder capable of slowing down the rotation of the drive shaft. The driving mechanism has a housing and a drive shaft extending along an axial direction. The electromagnetic retarder has a stator support fixed to the housing that has at least one relief extending along the axial direction, and in that the housing comprises at least one complementary relief cooperating with at least part of the relief of the stator support to fix the position of the stator support in relation to the housing along at least one direction contained in a plane perpendicular to the axial direction.

## Claims

### Claim 1

An assembly comprising a rotational driving mechanism of a drive shaft, and an electromagnetic retarder capable of slowing down the rotation of the drive shaft, the driving mechanism comprising a housing and a drive shaft that is capable of pivoting around an axis of rotation extending along an axial direction, said electromagnetic retarder comprising a rotor fixed to the drive shaft, a stator support fixed to the housing, and a stator integral with the stator support, wherein the stator support comprises at least one relief extending along the axial direction, and in that the housing comprises at least one stud provided with an attachment hole configured to fix the stator support to the housing and at least one complementary relief cooperating with at least part of the relief of the stator support to fix the position of the stator support in relation to the housing along at least one direction contained in a plane perpendicular to the axial direction, said complementary relief being a projection extending in the extension of a cylindrical face of the at least one stud.

### Claim 2 (depends on 1)

The assembly according to claim 1, wherein the relief comprises a ring having a point of the axis of rotation as its center.

### Claim 3 (depends on 1)

The assembly according to claim 1, wherein the stator support comprises three reliefs situated around a point of the axis of rotation approximately 120° from each other.

### Claim 4 (depends on 1)

The assembly according to claim 1, wherein the housing comprises three complementary reliefs situated around a point of the axis of rotation approximately 120° from each other.

### Claim 5 (depends on 2)

The assembly according to claim 2, wherein the housing comprises three complementary reliefs situated around a point of the axis of rotation approximately 120° from each other

### Claim 6 (depends on 3)

The assembly according to claim 3, wherein the housing comprises three complementary reliefs situated around a point of the axis of rotation approximately 120° from each other

### Claim 7 (depends on 2)

The assembly according to claim 2, wherein the ring comprises at least one attachment hole having a center, the distance between the center of said at least one attachment hole and the edge of the ring being less than the diameter of a stud.

### Claim 8 (depends on 2)

The assembly according to claim 2, wherein each projection comprises a hollowed-out cylindrical face capable of bearing against a lateral face of the ring.

### Claim 9 (depends on 8)

The assembly according to claim 8, wherein the distance between the center of the attachment hole of the housing and the hollowed-out cylindrical face is between 12 and 25 millimeters.

### Claim 10 (depends on 2)

The assembly according to claim 2, wherein the stator support also comprises a peripheral surface surrounding the ring, and wherein the ring comprises a flat bearing surface on which part of the housing is supported, the peripheral surface being parallel to the bearing surface, the peripheral surface being offset along the axial direction in relation to the bearing surface by a distance of between 1 and 10 millimeters.

### Claim 11 (depends on 4)

The assembly according to claim 4, wherein the stator support also comprises a peripheral surface surrounding the ring, and wherein the ring comprises a flat bearing surface on which part of the housing is supported, the peripheral surface being parallel to the bearing surface, the peripheral surface being offset along the axial direction in relation to the bearing surface by a distance of between 1 and 10 millimeters.

### Claim 12 (depends on 5)

The assembly according to claim 5, wherein the stator support also comprises a peripheral surface surrounding the ring, and wherein the ring comprises a flat bearing surface on which part of the housing is supported, the peripheral surface being parallel to the bearing surface, the peripheral surface being offset along the axial direction in relation to the bearing surface by a distance of between 1 and 10 millimeters.

### Claim 13 (depends on 6)

The assembly according to claim 6, wherein the stator support also comprises a peripheral surface surrounding the ring, and wherein the ring comprises a flat bearing surface on which part of the housing is supported, the peripheral surface being parallel to the bearing surface, the peripheral surface being offset along the axial direction in relation to the bearing surface by a distance of between 1 and 10 millimeters.

### Claim 14 (depends on 1)

The assembly according to claim 1, wherein the housing comprises at least two studs comprising projections, the studs provided with projections being situated around a point of the axis of rotation approximately 120° from each other.

### Claim 15

An electromagnetic retarder capable of slowing down the rotation of a drive shaft of a driving mechanism, the drive shaft being capable of pivoting around an axis of rotation extending along an axial direction, said electromagnetic retarder comprising a rotor intended to be fixed to the drive shaft, a stator support intended to be fixed to the housing, and a stator integral with the stator support, wherein the stator support comprises at least one relief extending along the axial direction, said relief being capable of cooperating with at least one complementary relief of the housing to fix the position of the stator support in relation to the housing along at least one direction contained in a plane perpendicular to the axial direction.