Actuation device for a brake

Abstract

An actuation device for a brake has an accumulator (14). The accumulator (14), when in a parking brake position, acts on a ball ramp actuator (10) via a connecting element to actuate the brake as a parking brake. If the accumulator (14) is in a released position, an actuator (16) is activated to displace a catch (17) and to hold the accumulator (14) in this released position.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

The invention will now be described, by way of example, with reference to the accompanying drawings in which:

FIG. 1 is a forklift;

FIG. 2 is an electrically driven axle, and

FIG. 3 is a schematic illustration of an actuation device for the electrically driven axle.

Claims

1-6. (canceled)

7. An actuation device for a brake (9) of a forklift vehicle (1) having a means (13) for operating the brake as a service brake and a means (14) for operating the brake as a parking brake, wherein the means (14) for operating the brake as the parking brake has an accumulator (14) which, in a parking brake position, exerts a force on the brake (9) such that the brake (9) is engaged, the accumulator (14) is activated by a first actuator (15) into a released position to disengage the brake (9), in the released position, the accumulator (14) exerts no force on the brake (9), a retaining means (17) is operated by a second actuator (16) such that when the accumulator (14) is in the released position, the accumulator (14) is held in the released position, if the first actuator (15) for operating the accumulator (14) is not activating the accumulator (14).

8. The actuation device according to claim 7, wherein the actuation device further comprises a ball ramp (10) which operates a multi-disc brake (9), and the ball ramp (10) is activated via a fixedly mounted connecting element (11).

9. The actuation device according to claim 8, wherein the means (13) for operating the brake (9) as a service brake and the means (14) for operating the brake (9) as a parking brake both communicate with the connecting element (11).

10. The actuation device according to claim 9, wherein a fixedly positioned bearing (12) is located between the ball ramp (10) and both the means (13) for operating the brake (9) as a service brake and the means (14) for operating the brake (9) as a parking brake.

11. The actuation device according to claim 9, wherein the means (13) for operating the brake (9) as a service brake and the means (14) for operating the brake (9) as a parking brake only act on the connecting element in a sense of engagement.

12. An electrically driven axle with a ball ramp (10) which communicates with a brake (9) for engaging the brake (9), the electrically driven axle having a means (13) for operating the brake (9) as a service brake and a means (14) for operating the brake (9) as a parking brake, the means (14) for operating the brake (9) as the parking brake comprises an accumulator (14) which, in a parking brake position, exerts a force on the brake (9) whereby the brake (9) engaged, and the accumulator (14) is operated by a first actuator (15) to disengage and thereby be brought into a released position, in which the accumulator (14) exerts no force on the brake (9), a retaining means (17) is additionally operated by means of a second actuator (16), when the accumulator (14) is in the released position, the accumulator (14) is also held in the released position, when the first actuator (15) for operating the accumulator (14) operates the accumulator (14) not in a sense of opening.

13. An device for actuating a brake (9) of a forklift vehicle (1), the device comprising: a first actuator (13) communicating with the brake (9) for actuating the brake (9) as a service brake;an accumulator (14) communicating with the brake (9) for operating the brake (9) as a parking brake; the accumulator (14), when in a parking brake position, exerts a force on the brake (9) such that the brake (9) is engaged,a second actuator (15) biasing the accumulator (14) into a released position for disengaging the brake (9), and the accumulator (14), when in the released position, exerts no force on the brake (9); andwhen the accumulator (14) is in the released position and the second actuator (15) is not biasing the accumulator (14) into a released position to disengage the brake (9), a third actuator (16) activates a retaining means (17) for retaining the accumulator (14) in the released position.