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US 2003/0197424 A1Published application
Drive and/or braking device
AssigneeNone recorded
InventorsRonald Frey, Harald Schmidt, Johannes Helmich, Birgit Scheytt, Werner Baeskow
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AssigneeNone recorded
InventorsRonald Frey, Harald Schmidt, Johannes Helmich, Birgit Scheytt, Werner Baeskow
Estimating the term…
The invention relates to a drive and/or braking device, specifically to be installed in motor vehicles, having an electric drive unit and/or an electromagnetic brake unit, where a shaft can be driven by the drive unit and/or braked by the brake unit, having a closed, specifically water- and air-tight housing accommodating the drive and/or brake unit, and a wiring harness to connect the drive device to a source of current. The invention is characterized in that the wiring loom has at least one hollow lead to vent the interior of the housing.
Drive and/or braking device (10), particularly for installation in motor vehicles, having an electric drive unit (12) and/or having an electromagnetic brake unit (14), where a shaft (16) can be driven by the drive unit (12) and/or braked by the brake unit (14), having a closed, specifically water- and air-tight housing (18) accommodating the drive (12) and/or braking unit (14), and having a wiring harness (26) to connect the drive and/or braking device (10) to a source of current, characterized in that the wiring harness (26) has at least one hollow lead (32) to vent the interior of the housing (18).
Dependencies are inferred from the claim text.
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No related US applications are recorded in the indexed filing history.
Backward citations are indexed for grants only.
Auxiliary parts of casings not covered by groups H02K5/06-H02K5/20, e.g. shaped to form connection boxes or terminal boxes: terminal boxes or…
Casings or enclosures characterised by the shape, form or construction thereof: with arrangements for protection from ingress, e.g. water or fingers
Specific aspects not provided for in the other groups of this subclass relating to casings, enclosures, supports: machines characterised by drain…
Dynamo-electric machines
Term end not estimated
The invention relates to a drive and/or braking device, particularly an actuator unit for a locking differential on a motor vehicle, having an electric drive unit and/or an electromagnetic brake unit, where a shaft can be driven by the drive unit and/or braked by the brake unit, having a closed, specifically water and air-tight housing which holds the drive and/or brake unit, and having a wiring harness to connect the drive and/or brake unit to a source of current.
Such drive and/or braking devices are used particularly in automobile construction to assist the drive and brake systems. They can be used in particular as an actuator to actuate a locking differential of a motor vehicle.
Generic devices have to satisfy extreme requirements. The operating temperature of electromagnetic brakes is in the range of about 200° C. If the device is located in the area of catalytic converters, for example, the operating temperature of the drive device can rise to 200° C. Depending on weather conditions, a sudden, severe cooling of the drive and/or brake device can be the result, for example, when driving through a puddle of water.
Additional advantageous embodiments and details of the invention can be found in the description to follow, in which the invention is explained and described in greater detail using the embodiments shown in the drawing.
A drive and brake device 10 is shown in longitudinal section in the figure. The device 10 is used particularly to active a locking differential for motor vehicles. The device 10 has an electrical drive unit 12 and an electromagnetic brake unit 14. The device 10 has in addition a shaft 16 which can firstly be driven by the drive unit 12 and secondly can be braked by the brake unit 14.
The drive unit 12 and the brake unit 14 are housed in a closed, water- and air-tight housing 18. The housing 18 comprises two housing sections 20 and 22. Housing section 20 has a pot-like configuration and locates the drive unit 12. Housing section 22 can be flanged to housing section 20 and accommodates the brake unit. Shaft 16 extends through housing section 22, where a shaft lip seal 24 is provided between housing section 22 and the shaft 16.