FI99195B - Arrangement for splitting timber - Google Patents

Description

99195

Wood splitter

The invention relates to a wood splitting device comprising a frame, at least one wedge-shaped blade arranged to be movable relative to the frame and a counterpart arranged in the frame, the blade being arranged to guide a pushing member making a longitudinal movement.

Such a device is designed for use on farms as well as larger households with a tractor, whereby such a device is preferably powered by the tractor's own hydraulic push arm.

The traditional and most common way is to chop the trees by hand with an ax. On the other hand, various mechanical devices, both mechanical and hydraulic, for splitting 15 trees have also been developed.

Thus, devices are known which are equipped with so-called screws. With such a device, the wood is hal-. with a conical screw passing through it.

»·

Devices consisting of different * * 20 cross-blades are also known. Such a device is, for example, disclosed in Finnish patent FI 87433. The purpose of the device is both to cut and split trees. A device is also known from the prior art which operates on a hydraulic cylinder integral to the device.

25 Such a device is shown, for example, in the Finnish patent FI 72673. The device is based on a fixed location. to a permanent counterblade blade, and to a vertically hydraulically movable blade. Similar devices in which the hydraulic cylinder pressing the wood towards the blade operates horizontally are disclosed, for example, in DE 31 00 644 and in U.S. Pat. No. 4,293,013, U.S. Pat. No. 4,328,845 and U.S. Pat. No. 4,454,899.

However, there are significant drawbacks to the prior art. Thus, the disadvantage of the devices 35 operating with hydraulics is that the devices require expensive long-stroke hydraulic cylinders with a clearance of at least 50 cm, developed for them. An even longer range of motion is often required to ensure safe cracking of even long trees. Thus, for such emotionally supported machines, splitting long trees presents problems.

Furthermore, the operational safety of these prior machines is questionable, because in order to guarantee the complete cracking of the wood, the wood as a whole must pass through the blade that controls it. If the movement of the wood and / or the blade is stopped earlier for safety reasons, the wood will not crack satisfactorily.

In addition, these devices cannot guarantee the cracking of large logs. The cost of the equipment is also remarkably high due to the complex blade equipment and the large hydraulic cylinder. Raw material sales are also high in the manufacture of a complex body part of a device.

The object of the present invention is to obviate the drawbacks of the prior art and to provide a completely new solution which provides a low manufacturing cost for the device according to the invention, as well as a very simple structure.

*: *. This object is achieved in that a wood chopping device according to the present invention has a claim. the characteristics defined in the More specifically, ... the main feature of this device according to the invention is * * *. characterized in that the other side of the wedge-shaped blade has a disadvantage substantially perpendicular to the direction of movement of the blade.

»» · ·); The invention is based on the idea that the device '. \ when used, its driving force comes from the tractor's own • · * * iron push rod. Furthermore, when it is found in the invention that by arranging a disadvantage in the connection of the splitting blade of the device in a substantially vertical position, it is possible to completely crack the wood with a very short movement of the push rod guiding the blade.

The invention will now be examined in more detail with the aid of the accompanying drawings, in which Fig. 1 shows a side of a wood chopping device according to the invention, and Fig. 2 shows a top view of a wood chopping device according to Fig. 1.

Figures 1 and 2 show a preferred embodiment of a cleavage device according to the invention. Such a device comprises a frame 1 which is attached to the tractor at its first end 2 and in which the second end of the frame has a foot 3 for supporting the device on the ground during use. When chopping the trees, the leg 3 is adjusted to a suitably high height, whereby a substantially horizontal working position is obtained.

The hydraulic push rod on the tractor (not shown) is removed and installed between the bracket 4 in the frame 1 and the blade assembly 5, connecting it to the blade ·. ’·: 6. Connect the hydraulic hoses and the splitting device is in operation.

/; · It should be noted, however, that there is nothing to prevent the use of other sources of force to control the device.

• · • ·

The log 7 to be split is placed on the body 1 between the te-25 and the counterpart 8 projecting substantially perpendicular to the body. The mating piece is preferably arranged eccentrically in the body so that its inner vertical side is substantially in the center line of the body. The distance between the blade and the mating piece, the so-called tip spacing, is adjusted to suit by compressing the body. Body co- * ·. the compression is successful because the body tube 9 is arranged; designed to slide telescopically into each other, whereby • · · by inserting the body tube part 10 into its second part 11, the tip gap can be reduced. Correspondingly, by pulling the tubes 35 apart, the tip gap can be widened. The body tube is locked in its operating position 4 99195 by means of a pin 12 through the holes therein. The desired splitting point of the log 7 is placed in front of the blade 6, and the log is pressed against the mating piece 8.

The blade to be applied to the wood to be split is preferably conical in shape. A substantially vertical defect 14 is arranged on the other side 13 of the blade. As the blade continues to protrude into the wood already partially split by the wedge-shaped blade, the disadvantage adheres to the end of the split wood according to Fig. 2. The disadvantage pushes a part of the split wood with it past the mating piece 8, completely detaching it from the wood remaining in place at the tip.

15 If the chopped trees remain too swampy. The above splitting operation can be repeated until the result is satisfactory.

When splitting wood, it is arranged in the tip space so that the assumed center line of the wood to be split is located on a line connecting the tip of the splitting blade 6 and the straight side on the center line of the mating piece 8. In this case, the piece • · // · * machined from the wood to be chopped can pass the counterpart 8 without hindrance.

• »·: The splitting operation described above is performed by te-; The horizontal movement of the spigot 6 is very short due to the action of the splitting blade disadvantage 14. The device according to the invention • * ·· is also safe because the speed of the pushing cylinder is size: T: steplessly adjustable during the splitting operation.

The movement of the blade part 6 is also limited so that the blade part 30 cannot be pressed against the mating piece 8, * ♦ when the cylinder is in the extreme position, there is about 2 centimeters of free space between the blade and the mating piece.

It is to be understood that the foregoing description and the accompanying figures are intended only to illustrate the present invention. Thus, the invention is not limited solely to the embodiment described above or defined in the claims, but many different variations and modifications of the invention will be apparent to those skilled in the art which are possible within the scope of the inventive idea defined in the appended claims.

* · * • 1 «• · • · • · · · · · · · · · · · · · · · · · · · · · · · • · · • m • · • · · ψ · ♦ · e · · • · · ··· ···· ··· x: ··· • · • · e • · ♦ • · · • · ♦ • ·· • ·

Claims (5)

An apparatus for splitting wood comprising a frame (1), at least one wedge bore (6) arranged movably in relation to the body and a counterpart (8) arranged to the steam, a displacement member having a longitudinal movement is arranged to guide the bite, characterized in that the wedge-shaped bite (6) has on its one side a cutter (14) which is substantially perpendicular to the direction of movement of the bite. 2. A device according to claim 1, characterized in that the counterpiece (8) is arranged eccentrically to the body tube (9) provided by the body (1) so that the vertical side of the counterpiece is substantially pk the center line of the body tube. A device according to claim 2, characterized in that the bite (6) is arranged to move substantially along the center line of the body tube. Wherein the insert (14) shown by the bite (6) is arranged to the side of the insert which lies on the opposite side of the center line relative to the counterpart (8). 4. A device according to claim 1, 2 or 3, characterized in that the displacement means' 25 arranged to control the bite (6) and to perform a longitudinal movement are constituted by a hydraulic pressure shaft connected to the device. 5. A device according to any preceding claim, characterized in that the space between the ·, bite (6) and the counterpart (8) is arranged to be changed by a displacement of the partu of the frame tube (9): (10, 11) ·: within each other, wherein the reading of the parts (10, 1 1) is arranged to be provided with fasteners arranged in hkl (12) shown by the frame tube (9).