Industrial truck with adjustable wheel axle

An industrial truck comprising:

• a vehicle frame;
• a load pickup, which can be displaced in relation to the vehicle frame;
• a front wheel axle;
• a moveable wheel axle a distance from the front wheel axle, wherein the moveable wheel axle is further away from the load pickup than the front wheel axle and is capable of moving in relation to the vehicle frame;
• a selectively controllable load force device connected in terms of force transfer to the load pickup and provided so as to displace the load pickup in relation to the vehicle frame;
• an adjusting device connected to the moveable wheel axle and configured to adjust the moveable wheel axle in relation to the vehicle frame along an adjustment trajectory with an adjustment component that is orthogonal with respect to a standing area of the industrial truck;
• wherein a loading force, which is caused by a tare weight of the industrial truck and any load picked up by said industrial truck, acts on the moveable wheel axle, and the loading force changes while said industrial truck is in operation;
• wherein an additional force, which is in addition to the loading force and is an actuating force required for adjusting the moveable wheel axle, is changed according to a force output by the load force device;
• wherein the adjusting device comprises a first pressure chamber having a pressure that is changed according to the force output by the load force device;
• and
• wherein the moveable wheel axle is hydraulically spring-loaded and the pressure of the first pressure chamber is changed while retaining the spring-loading of the moveable wheel axle.

An industrial truck comprising:

• a vehicle frame;
• a load pickup, which can be displaced in relation to the vehicle frame;
• a front wheel axle;
• a moveable wheel axle a distance from the front wheel axle, wherein the moveable wheel axle is further away from the load pickup than the front wheel axle and is capable of moving in relation to the vehicle frame;
• a selectively controllable load force device connected in terms of force transfer to the load pickup and provided so as to displace the load pickup in relation to the vehicle frame;
• an adjusting device connected to the moveable wheel axle and configured to adjust the moveable wheel axle in relation to the vehicle frame along an adjustment trajectory with an adjustment component that is orthogonal with respect to a standing area of the industrial truck;
• wherein a loading force, which is caused by a tare weight of the industrial truck and any load picked up by said industrial truck, acts on the moveable wheel axle, and the loading force changes while said industrial truck is in operation;
• wherein an additional force, which is in addition to the loading force and is an actuating force required for adjusting the moveable wheel axle, is changed according to a force output by the load force device;
• and
• wherein the adjusting device comprises a first pressure chamber having a pressure that is changed according to the force output by the load force device such that a reduction in the loading force is compensated for by an increase of hydraulic pressure in the first pressure chamber.