DE4038573C2 - - Google Patents

Description

The invention relates to a pruning device according to the preamble of claim 1, the predominantly for branching without Reichhö is limited.

Known such non-hand-held branches can either just a spiral rotation around the stem full lead or drive linearly on the trunk and then a fair Execute locking.

The known systems have the further disadvantage that, as far as the stem axis is rotating systems, if the driving force is interrupted only under great difficulty can be traced back, so that in any case do not return to their starting point by gravity can. These devices also need to be positioned on Always give the tribe a high minimum amount of time as they move can only move up and down spirally.

Linear devices cannot make a saw cut and are therefore dependent on the less gentle measurement load sen, d. H. they always have a whole branch whisk at the same time shear off what a very large tire pressure with all Disadvantages of the cabium injury.

DE-AS 12 28 099 describes a self-propelled branching device with swiveling steering knuckles.

In US 35 45 509 it is described that in a linear movable device the distance of the saw to the trunk adjustable is.

The object of the invention is therefore to take advantage of linear movement on the trunk with the spiral movement combination mode during the cut and at the same time high operational reliability through the possible use of the To achieve gravity to return. The device should also Be ergonomically useful because the fort Movement devices for the branch work also to the horizon tal implementation on the floor can be used. Thereby becomes a smaller mass of the device, which one lower contact pressure of the rollers to the trunk is necessary.

The solution is given in claim 1. A subordinate claim indicates an advantageous further education.

The invention is illustrated below with the aid of an embodiment explained in more detail. It shows:

Figure 1 is a side view of a branching device on a trunk;

Figure 2 shows the device in a side view when driving on the ground;

Figure 3 is a top view of Figure 1;

Figure 4 is a top view of the device when driving on the ground;

Fig. 5 the device traveling along a trunk;

Image 6 the device standing on the ground on a trunk.

Through the use of steering knuckles on all pressure rollers of the device, the wheels of the machine moving linearly upwards on the trunk can be swiveled and a spiral-shaped rotating movement can be achieved, shown in Fig. 1 and Fig. 3. The rotating working mode is selected to match a vertical standing saw sword while circling the trunk to make the pruning.

If the drive source fails, the steering cylinders become depressurized and the machine can return to the base of the trunk linearly by gravity, shown in Figure 5. For this purpose, the steering knuckles have a return spring or a caster, which also causes the pivoting movement of the axles via gravity.

To move the machine from tree to tree, the two pressure rollers around the trunk are swiveled diagonally backwards by about 120 °, shown in Fig. 2 and Fig. 4, so that the device comes ready to drive on three wheels. The steering knuckles remain in linear travel mode.

In Figure 2, the guide rollers for locomotion on the forest floor are swung back. Each wheel has its own hydraulic motor, which is supplied with pressure by a central pressure unit, which is driven by a piston machine.

For the branch work, the machine is moved to the trunk and then the wheel legs of wheels 3 and 4 are swiveled diagonally upwards, shown in Fig. 5 and in Fig. 6. After the legs are closed around the trunk, the wheels ( 1 , 2 ) or one of them pressed against the trunk, shown in Fig. 3 and Fig. 5. The contact pressure is then evenly distributed over all rolls. The machine functions can then be carried out by radio control.

The machine runs under the first branch whisk. Then the Saw motor switched on and the wheels are swiveled, causing a spiral movement of the device around the Strain is effected. In this spiral ascent, the Branch cuts made.

The machine can move into linear at any time by gravity Controlled driving position and then moved down the stem  will.

In this version, the motor unit consists of a ver internal combustion engine, which has a hydraulic pump and a Pressure accumulator builds up a constant pressure that all Wheel motors, the steering cylinders, the saw drive, the rollers pressure and drives the lock cylinder. The functions can be activated via radio control.

Reference list

1 - wheel
2 -wheel
3 -wheel
4 -wheel
5 - trunk
6 - Motor housing

Claims (2)

1. Self-propelled grooming device with pivotable steering knuckles, characterized in that ge can be driven linearly on the trunk axis, and a spiral upward movement can be triggered by pivoting the wheels around the trunk axis, the vertically upward chain saw being set at a distance from Trunk cuts the branches. 2. Self-propelled grooming device according to claim 1, characterized records that the wheels that are in the branch on the trunk as Ge counter pressure rollers act diagonally for driving on the ground can be pivoted backwards that they have the support functions take over for driving.