FI102596B - Cutting device for cutting trees - Google Patents

Description

1 102596

Cutting device for cutting trees.

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The invention relates particularly to a device for cutting trees, which can be mounted in a vehicle in connection with a loading grapple at the end of a boom.

Trees are cut with many different devices. The simplest are straight toothed blades that are moved by either human or machine power. Or the teeth may be in the form of a disc and the blade rotating. Probably the most common is a blade where the teeth are arranged in a chain and the chain is driven by a motor force rotating the support flange. chain saw. There are also devices for crushing wood with various blades using hydraulic power / earth. Known devices for attaching a timber loader grapple to cut smaller, so-called. Energy trees. The grapple grapple is one example, where two smaller hydraulic cylinders are used to trap the tree in a clamping manner and a third working cylinder pushes the blade through the wood in a transverse direction.

Various hydraulic force-based devices are also used to cut wood into flaps, which cut the wood by squeezing the blade or blades through the wood, either by its own or by a separate power machine.

The main problem with energy wood harvesting is the high cost of harvesting. Due to their technology and manufacturing costs, the cutting tools to date are expensive to manufacture and use. There is a need for devices that are simple, inexpensive to manufacture, and cheap at 3Lt> running costs.

The operation of the device according to the invention is simple, its blades are reciprocated with a single working cylinder, controlled according to the need of the application and have low manufacturing costs due to the simple manufacturing technique. The features of the invention will be apparent from the appended claims.

In the following, the cutting device will be described with reference to the accompanying drawings.

Figure 1 is a top view of the cutting device.

Figure 2 schematically shows a cutting device connected to a log grapple.

Figure 3 schematically shows a cutting device attached to a stand for chopping trees.

3 & Fig. 4 shows additional parts of the cutting device blades for splitting trees.

The cutting device consists of two opposed knife-shaped blades (1), which are axially connected to each other by means of a joint 2 and articulations 6 to two lever arms 3 and 4 on different sides of the device, which are axially interconnected through the aperture between the blades. The point of attachment of the arms to the blades is approximately halfway along the blades. At one end of the arms there are ends of a hydraulic cylinder 7.

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Separate axle and blade axialization results in a smaller blade opening angle for the wood to be cut and a greater force for movement. The movement of the hydraulic cylinder and at the same time the movement of the blades works according to the application. t ~ i 6 For example, a cutting device connected to a log grapple is connected to the grapple hoses so that the grapple operates before the machine. The attachment of the device to the grapple is articulated so that it also pivots transversely to the grapple and locks so that it does not interfere with normal loading. In addition, the clamping mechanism includes a trigger which allows the clipping device to rotate about 90 degrees to the longitudinal axis of the grapple.

In the tree shredder, the cutting device operates fixed to a stationary frame 11 on which the trees are fed between movable blades provided with a splitting wedge 8 so that the trees are both chipped and split in the same movement. The operation of the device can be controlled, for example, by a hydraulic valve which, at the extreme ends of the path, reverses the movement. With the wedge-shaped transverse auxiliary blades Sö attached to the blades of the cutting device, shorter trees can be cut in the same movement.

It will be apparent to those skilled in the art that the scope of use of the cutting device is not limited to the examples above, but may also be used in other applications within the scope of the claims below.

Claims (2)

3, 102596 Cutting device, in particular for cutting trees, which can be mounted in a vehicle in connection with a loading grapple at the end of a boom, characterized in that at one end, knife-like and operable blades (1) are connected to each other by a joint with an opening close to the joint the different arms (3 and 4) are connected by means of a joint (5), that both arms are connected to their respective blade halves by means of the hinges (6) and that the outermost ends of the arms are at one end and (7b) of the hydraulic cylinder. Device according to Claim 1, characterized in that it is connected to a frame (11), in which it is fixed upwards from the joint (2) and has a table (9) and a length guide (10); and that on both sides of the blades (1) there are wedge-shaped additional blades. 4, 102596