ELECTRICALLY-DRIVEN AXLE

Abstract

An electrically driven axle with electrical drive units (4) arranged symmetrically around the axle body (1). The drive units having an electric machine and a transmission, and at least one spring-loaded brake (3) as a parking brake. The spring-loaded brakes (3) are arranged radially, thus enabling the spring-loaded brake (3) to be released by removing a release spindle (7) from brake cylinders of the spring-loaded brakes (3).

Claims

1-6. (canceled)

7. An electrically driven axle comprising: electrical drive units (4) being arranged symmetrically around an axle body (1), the drive units having an electric machine and a transmission, at least one spring-loaded brake (3) as a parking brake, and the spring-loaded brakes (3) being arranged radially, thus enabling the spring-loaded brake (3) to be released from brake cylinders of the spring-loaded brakes (3) by virtue of a new position of a release spindle (7).

8. The electrically driven axle according to claim 7, wherein the brake cylinders of the spring-loaded brakes (3) are arranged rotated through 90°.

9. The electrically driven axle according to claim 7, wherein the drive units (4) comprise transmissions of a countershaft design.

10. The electrically driven axle according to claim 7, wherein the drive units (4) comprise transmissions of a planetary design.

11. The electrically driven axle according to claim 7, wherein the drive units are arranged at a middle of the axle.

12. The electrically driven axle according to claim 7, wherein the spring-loaded brakes (3) are arranged between vehicle brakes (5) and the drive units (4).

13. An electrically driven axle comprising: an axle body (1) extending along a lateral axis; electrical drive units (4) being arranged symmetrically around the axle body, and each of the drive units having an electric machine and a transmission; at least one spring-loaded brake (3) as a parking brake, the spring-loaded brakes (3) being arranged perpendicularly relative to the lateral axis, and the spring-loaded brake (3) having a release spindle (7) which is movable perpendicularly relative to the lateral axis to release the spring-loaded brakes (3) from brake cylinders of the spring-loaded brakes (3).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The invention will be explained in greater detail with reference to the following figures:

[0012] FIG. 1: Installation of an axial brake according to the prior art

[0013] FIG. 2: Installation of a radial brake according to the invention

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] FIG. 1 shows the installation, known from the prior art, of spring-loaded brakes 3 which are orientated axially relative to the axle body or its axis. On the side of the spring-loaded brake 3 facing away from the drive wheel, which consists among other things of a brake cylinder and a spring, a release spindle 7 is fitted by means of which the brake can be unlocked, for example when the vehicle has to be towed. The release spindle 7 has to be unscrewed, but when the release spindle is unscrewed it moves in the direction of the drive unit 4. Since there is very little free space here, it is difficult to loosen the release spindle 7. Furthermore the free space situation can be made worse by worn brake pads, which press against the brake disks 5 of the vehicle's brakes, since because of that the spring-loaded brake is displaced farther in the direction of the drive unit 4.

[0015] FIG. 2 shows a solution according to the invention. In this case the spring-loaded brake 3 is no longer installed axially relative to the axis of the axle body 1, but rather, rotated by 90° relative to the axis of the axle body 1, so that now, in its action direction, it is installed between the axle body 1 and the air spring 6. Thus, the release spindle 7 of the spring-loaded brake 3 is unscrewed in the direction of the air spring brake 6 or radially relative to the axis of the axle body 1 when the brake is to be unlocked manually. This is possible without any problems due to the larger installation space at this point. Furthermore, the release spindle 7 is in that way better accessible from the outside, from the side of the drive wheel fitted onto the hub 2, since the release spindle 7 is no longer arranged behind a component, namely the parking brake 3 itself. The release spindle 7 is therefore more easily accessible from the side of the drive wheel. Moreover, when it is unscrewed the release spindle 7 does not have to be opened or unscrewed from the side of the drive wheel out of the vehicle, but can be loosened radially relative to the vehicle's axle, which makes loosening it simpler.

INDEXES

[0016] 1 Axle body

[0017] 2 Hub of the drive wheel

[0018] 3 Spring-loaded brake

[0019] 4 Drive unit

[0020] 5 Brake disk

[0021] 6 Air spring

[0022] 7 Release spindle