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An axle-lifting device for lifting an axle of a vehicle. The axle-lifting device includes a function mechanism for generating a force component in an axle-lifting direction. The function mechanism is configured to generate a first force component for providing a first functionality and a second forc

An axle-lifting device for lifting an axle of a vehicle. The axle-lifting device includes a function mechanism for generating a force component in an axle-lifting direction. The function mechanism is configured to generate a first force component for providing a first functionality and a second force component for lifting the axle in the axle-lifting direction.

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1. An axle-lifting device for lifting an axle of a vehicle, comprising: a function mechanism for generating a force component in an axle-lifting direction,wherein the function mechanism is a bellows and is configured to generate the force component in the axle-lifting direction having a first force

1. An axle-lifting device for lifting an axle of a vehicle, comprising: a function mechanism for generating a force component in an axle-lifting direction,wherein the function mechanism is a bellows and is configured to generate the force component in the axle-lifting direction having a first force component to provide a first functionality and having a second force component in the axle-lifting direction to lift the axle;wherein the function mechanism includes a separating piston,wherein a variation in at least one of an internal fluid pressure and an internal fluid quantity distribution in the function mechanism causes a displacement in a resting position of the separating piston, the force component in the axle-lifting direction being generated as a function of the displacement,wherein a load state is proportional to the fluid pressure to provide direct control of the axle-lifting device,wherein the function mechanism is configured to provide another force component against the axle-lifting direction for providing the first functionality,wherein the function mechanism is configured as the bellows having a shock absorber, the first functionality being a shock-absorbing effect of the shock absorber and the first force component being a shock-absorbing force of the shock absorber,wherein the shock absorber houses the separating piston and is configured to induce the second force component by the displacement of the resting position of the separating piston, andwherein the bellows is connected to a chassis of the vehicle and to one end of a suspension arm, which is opposite the other end of the suspension arm, which is connected to a trestle connected to the chassis. 2. The axle-lifting device of claim 1, wherein the shock absorber has a valve, and the displacement of the resting position of the separating piston is to be induced by pressure acting on the valve. 3. The axle-lifting device of claim 1, wherein the shock absorber is configured as a pneumatic suspension. 4. The axle-lifting device of claim 1, wherein the function mechanism is configured to generate the second force component in response to a supplied control signal. 5. The axle-lifting device of claim 4, wherein a control unit is configured to supply the control signal to the function mechanism. 6. The axle-lifting device of claim 5, wherein the control unit is configured to supply the control signal as a function of a load state of the vehicle. 7. The axle-lifting device of claim 1, wherein a force required to lift the axle is generated by a force-generating component, which already exists on the vehicle and is also used for other non-force generating functions. 8. A method for lifting an axle of a vehicle, the method comprising: providing a function mechanism for generating a force component in an axle-lifting direction, the function mechanism being configured to generate a first force component, to provide a first functionality, and to generate a second force component in the axle-lifting direction to lift the axle, wherein the function mechanism includes a separating piston;supplying a control signal to the function mechanism to generate the second force component; andvarying at least one of an internal fluid pressure and an internal fluid quantity distribution in the function mechanism to induce a displacement in a resting position of the separating piston, the force component in the axle-lifting direction being generated as a function of the displacement;wherein a load state is proportional to the fluid pressure to provide direct control of the axle-lifting device,wherein the function mechanism is configured to provide another force component against the axle-lifting direction for providing the first functionality,wherein the function mechanism is configured as a bellows having a shock absorber, the first functionality being a shock-absorbing effect of the shock absorber and the first force component being a shock-absorbing force of the shock absorber,wherein the shock absorber houses the separating piston and is configured to induce the second force component by the displacement of the resting position of the separating piston, andwherein the bellows is connected to a chassis of the vehicle and to one end of a suspension arm, which is opposite the other end of the suspension arm, which is connected to a trestle connected to the chassis. 9. The axle assembly, comprising: a trestle for connecting to a vehicle chassis;a suspension arm for accommodating an axle of a vehicle, the suspension arm being movably connected to the trestle; andan axle-lifting device for lifting the axle, including a function mechanism for generating a force component in an axle-lifting direction, wherein the function mechanism is configured to generate a first force component to provide a first functionality and to generate a second force component in the axle-lifting direction to lift the axle, wherein the axle-lifting device is connected to the suspension arm;wherein the function mechanism includes a separating piston, and wherein a variation in at least one of an internal fluid pressure and an internal fluid quantity distribution in the function mechanism causes a displacement in a resting position of the separating piston, the force component in the axle-lifting direction being generated as a function of the displacement,wherein a load state is proportional to the fluid pressure to provide direct control of the axle-lifting device,wherein the function mechanism is configured to provide another force component against the axle-lifting direction for providing the first functionality,wherein the function mechanism is configured as a bellows having a shock absorber, the first functionality being a shock-absorbing effect of the shock absorber and the first force component being a shock-absorbing force of the shock absorber,wherein the shock absorber houses the separating piston and is configured to induce the second force component by the displacement of the resting position of the separating piston, andwherein the bellows is connected to a chassis of the vehicle and to one end of the suspension arm, which is opposite the other end of the suspension arm, which is connected to the trestle connected to the vehicle chassis. 10. The axle assembly of claim 9, wherein the axle-lifting device is also connected to the trestle. 11. The axle assembly of claim 9, wherein the axle-lifting device is also connected to the chassis.