EP1968774A1 - Cutting and splitting device - Google Patents

Cutting and splitting device

Info

Publication number
EP1968774A1
EP1968774A1 EP06830922A EP06830922A EP1968774A1 EP 1968774 A1 EP1968774 A1 EP 1968774A1 EP 06830922 A EP06830922 A EP 06830922A EP 06830922 A EP06830922 A EP 06830922A EP 1968774 A1 EP1968774 A1 EP 1968774A1
Authority
EP
European Patent Office
Prior art keywords
cutting
splitting
blade
trunk
blade flange
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP06830922A
Other languages
German (de)
French (fr)
Other versions
EP1968774A4 (en
Inventor
Tarmo Pitkäniemi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Agromaster Oy
Original Assignee
Agromaster Oy
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Agromaster Oy filed Critical Agromaster Oy
Publication of EP1968774A1 publication Critical patent/EP1968774A1/en
Publication of EP1968774A4 publication Critical patent/EP1968774A4/en
Priority to FI20090286U priority Critical patent/FI8627U1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B27WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
    • B27LREMOVING BARK OR VESTIGES OF BRANCHES; SPLITTING WOOD; MANUFACTURE OF VENEER, WOODEN STICKS, WOOD SHAVINGS, WOOD FIBRES OR WOOD POWDER
    • B27L7/00Arrangements for splitting wood

Definitions

  • the invention relates to a cutting and split- ting device defined in the preamble of claim 1.
  • a splitting piston is provided with a straight slitting cutting blade secured thereto, which cutting blade, as the splitting piston pushes the previous cut piece of trunk through the splitting blade, at the same time cuts the next piece off the trunk.
  • the cut piece of trunk is turned or appropriately guided so that it is parallel to the movement of the cutting blade and can be pushed through the splitting blade.
  • the device has been found to be very functional in terms of its operating principles and simple to implement.
  • the prior art has one disadvantage. While being pressed against the trunk, the slitting, oblique blade edge causes pressing forces transverse relative to the direction of movement of the splitting piston, said pressing forces requiring special arrangements.
  • the splitting piston must be provided with an efficient and durable bearing, with roller bearings or sliding bearings in order for the splitting piston to be able to move anyway. Moreover, the splitting piston is subjected to transverse forces requiring of the structure special arrangements .
  • One specific objective of the invention is to disclose a new type of cutting and splitting device, in which with a simplest possible structure and using just one power unit, the trunk can be both cut and split, but, however, so that the cutting and splitting are performed separately, in separate and controlled procedures, which is to ensure that the cutting and splitting into separate pieces are performed tidily and safely.
  • the cutting and splitting device is designed for cutting and splitting trunks, so it comprises both a cutting tool and a splitting tool.
  • the cutting tool of the cutting and splitting device comprises two supporting frames disposed at a distance from one another, as well as in a slot between them, a plate-like blade flange which is sub- stantially of a thickness equal to said distance.
  • the supporting frames support the blade flange preventing its transverse movement and bending.
  • the supporting frames can preferably consist of plate-like structures, but other types of line-like or dot-like supporting surface structures are also possible as long as they will give sufficient support to the blade flange from both sides, so that the blade flange will not bend or warp when cutting the trunk.
  • both supporting frames are provided, at the same point, with a trunk feed opening extending through them; and the blade flange is provided with a blade edge having at least the length of the diameter of the trunk feed opening. The blade edge is so arranged that when turning the blade flange about its bearing point between the supporting frames, the blade edge passes through the trunk feed opening thereby cutting the trunk that has been fed into the trunk feed opening.
  • the invention uses a hydraulic cylinder as the power unit, but e.g. completely mechanical solutions are also possible.
  • a cam or a similar lever structure can serve as the power unit, so that it can be used to achieve the necessary back and forth motion both for cutting and splitting.
  • the cam can be connected for example to the power take-off shaft of a tractor. In this man- ner, the cutting and splitting procedure can be made simply faster than with hydraulics.
  • the bearing point or turning axis of a plate-like blade flange is disposed at the other edge thereof, and the lever structure is arranged at the opposite edge thereof.
  • the blade edge is suitably disposed between these, and the entire structure can be made a compact whole that only takes up a little space, and the forces acting herein are under control .
  • the blade edge has been so shaped and directed that as the blade edge touches the trunk being cut, it does not just cut the trunk in two but while partly moving in the longitudinal direction of the blade edge, it both presses and slits the trunk in two, which is clearly more efficient, less power requiring and leaves a tidier cutting mark than just cutting.
  • the blade edge is not parallel to the turning radius of the blade flange, but at an oblique angle with respect to its path of motion as it faces the trunk being cut.
  • the blade edge is curved so that it first more slits the trunk and then finally more just cuts.
  • the blade flange is an angular plate having a cutting aperture in the middle area thereof, the edge of which cutting aperture forms the blade edge. In this manner, the blade flange can be made very stiff and it also keeps its shape.
  • the edges of the trunk feed opening of the supporting frames form supporting surfaces that do not penetrate into the trunk, and the trunk is supported by the supporting frames as the blade edge is pressed against the trunk from the opposite side.
  • the edges of the trunk feed opening preferably form even edges, the width of which corresponds to the thickness of the plate to be used. It is even possible that the edges have been broadened from the thickness of the plate so that it is ensured that the trunk being cut is not allowed to be pressed against the edge, but the cutting is performed from just one direction by the slitting blade.
  • the plate-like supporting frames form the load-bearing and force-receiving body of the cutting and splitting device, on which the other end of the hydraulic cylinder is supported.
  • the body consists of two plates, between which the cutting blade moves, in cutting a trunk, the force effects caused by both the hydraulic cylinder and the cutting blade are directed to the device body so that they are parallel to the plates.
  • both the hydraulic cylinder and the cutting blade are supported between the plate frames and in the middle, no transverse forces are directed to the body.
  • the splitting tool is provided with a splitting piston connected to the motion of the hydraulic cylinder, the splitting piston being arranged throughout a splitting groove to push a cut piece of trunk through the splitting blade.
  • the splitting groove and the splitting piston which moves along it are parallel to the device body i.e. parallel to the direction of op- eration of the hydraulic cylinder.
  • the splitting piston is easy and simple to couple so as to operate together with the operation of the hydraulic cylinder.
  • the device must be provided with suitable turning elements, turning guides or a turning track, by means of which a piece of trunk that has been cut transversely can be made to turn lengthwise and drop into the groove.
  • the splitting groove and the splitting piston are transverse i.e. disposed in the feed direction of the trunk.
  • the pieces of trunk that will drop are disposed in the right direction with respect to the splitting groove.
  • suitable levers, chains or similar arrangements must be used to deflect the movement of the hydraulic cylinder to suit the splitting piston. This, however, also considerably increases the size of the structure of the cutting and splitting device in the lateral direction.
  • the hydraulic cylinder can be replaced with a suitable mechanical structure .
  • the splitting blade in the device it is possible to use blades, known per se in the field, which split a piece of trunk into two, four or more parts.
  • the splitting blades can be either fixed or ones to be manually or automatically adjusted.
  • the splitting tool is provided with a splitting wedge fitted into the surface of the blade flange, near the blade edge.
  • This kind of splitting wedge known per se which is to be used in a slitting blade, splits the trunk substantially at the same time as it cuts it.
  • This solution which is simple per se, does not, however, satisfy all the purposes of the invention because the splitting cannot always be performed satisfactorily, but the piece of trunk only splits at its one end while the other end remains intact.
  • a better solution is to use a splitting blade through which the entire piece of wood is pushed using a splitting piston.
  • the blade edge with its splitting wedges has been fitted at the two opposite edges of the cutting aperture of the blade flange.
  • the cutting aperture of the blade flange has been arranged to move over the trunk feed opening to its both sides, whereby the cutting and splitting procedures are performed with move- ments directed to both ends of the blade flange.
  • the cutting and splitting device of the invention has several advantages over the prior art.
  • the cutting and splitting device is as simple and reliable as possible in terms of its structure and operations; with just one hydraulic cylinder that performs all the functions. It is even possible that the same hydraulic cylinder provides power for both the trunk feed table and the conveyor belt by which the chopped wood bits are lifted into a heap or a trailer.
  • Fig. 1 schematically represents one cutting and splitting device as seen from the side;
  • Fig. 2 schematically represents another embodiment of the invention.
  • Fig. 1 schematically represents one embodiment of the invention as seen from the side.
  • the body of the cutting and splitting device consists of two adjacent supporting frames i.e. straight metal plates disposed at a distance of about 10mm from one another.
  • the plates have a wider round-shaped rear end, which then gets narrower to form the flatter front part of the body.
  • the slot between the supporting frames 1 is provided with a blade flange 2 bearing-mounted between them from a bearing point so as to turn back and forth.
  • the blade flange is round-shaped, although its shape is not essential for the operation of the device.
  • On the opposite side of the bearing point 3 of the blade flange 2 there is a lever 4 which extends outside the supporting frames 1.
  • the piston rod 14 of the hydraulic cylinder 5 Connected to the lever 4 is the piston rod 14 of the hydraulic cylinder 5 while the hydraulic cylinder itself is connected to the front part of the body.
  • the trunk feed openings 6 In the middle region of the wider rear end of the supporting frames 1 there are round-shaped trunk feed openings 6 in both plates, the diameter of which openings defines the thickness of the thickest trunk to be handled.
  • a cutting aperture 8 Near the trunk feed openings in the blade flange 2 there is a cutting aperture 8, having a curved blade edge 7.
  • the edge of the trunk feed opening 6 forms supporting surfaces 9, against which the trunk is pressed when cutting it.
  • Beneath the supporting frames 1 there is provided a splitting piston 10 to be moveable along a splitting groove 11.
  • splitting blade 12 At the end of the splitting groove there is a splitting blade 12, whose height position can be adjusted depending on the fact of whether there is a wish to split the wood in two or four.
  • the splitting piston 10 is connected to a hydraulic cylinder 5 by a lever structure 14, enabling straightforward motion of the splitting piston irrespective of the curved, back and forth rising and fal- ling motion of the lever 4.
  • curved guides 15 guide and turn the cut piece of trunk into the splitting groove.
  • the drawing does not show the control of the cutting and splitting device in detail, but it can be implemented in many various ways known per se .
  • the hydraulic cylinder can function automatically so that it turns the blade flange 2, whereupon the trunk will snap.
  • a trunk that has been pushed far enough can also be cut by manual control or e.g. with a foot pedal. Once the trunk has been cut, a piece of trunk will drop in the right direction into the splitting groove 11 under the control of the guides 15, and the splitting piston 10 will get out of the way. In that case, when cutting the next trunk, with the same movement of the hydraulic cylinder, the splitting piston pushes the piece of trunk through the splitting blade 12 splitting it in two or four parts, depending on the height set to the blade 12.
  • Fig. 2 shows another embodiment of the invention, where there are the same parts as for the cutting of the trunk as in the embodiment of Fig. 1, so they are not repeated in this connection.
  • the split- ting piston and the parts associated with it in the embodiment of Fig 1 have been replaced in this second embodiment with a splitting wedge 13 disposed in the blade flange 2 near the blade edge 7.
  • the splitting wedge is disposed substantially in the direction of motion of the blade flange 2; that is, it penetrates the piece of wood substantially simultaneously with the slitting blade edge 7, thereby splitting at least the one end of the piece of wood.
  • the cutting and the splitting are performed substantially simultaneously, so there is no need for a separate splitting that would be performed at the second step.
  • Parts or tools such as these can • include wheels or supports supported by which the device rests on the floor, such as a drawbar by which the device is drawn like you draw a trailer; a three-point linkage by which the device is connected to the rear of a tractor; a combustion motor or an electric motor coupled to a hydraulic pump; various feeding grooves or other arrangements for feeding the trunk manually or mechanically into the cutting and splitting device; as well as various conveyors or belts by which the chopped wood bits are moved or guided e.g. directly into a trailer.

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  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Wood Science & Technology (AREA)
  • Forests & Forestry (AREA)
  • Shearing Machines (AREA)

Abstract

The invention relates to a cutting and splitting device for cutting and splitting tree trunks, the cutting and splitting device including a cutting tool and a splitting tool. According to the invention, the cutting tool includes two supporting frames (1) at a distance from one another, as well as in a slot between them, a plate-like blade flange (2) having a thickness equal to said distance. In addition, the blade flange has been bearing-mounted (3) in the supporting frames so as to turn back and forth in the slot, and the blade flange extends outside the supporting frames thereby forming a lever structure (4) , to which the hydraulic cylinder (5) that turns the blade flange is coupled. Further, the supporting frames include a trunk feed opening (6) extending through them, and the blade flange includes a blade edge (7) having at least the length of the diameter of the trunk feed opening, the blade edge being arranged to pass through the trunk feed opening, when turning the blade flange, to cut a trunk that has been fed into the trunk feed opening.

Description

CUTTING AND SPLITTING DEVICE FIELD OF THE INVENTION
The invention relates to a cutting and split- ting device defined in the preamble of claim 1.
BACKGROUND OF THE INVENTION
The closest related art in the field of the invention describes international patent application WO2005072924. In the cutting and splitting device shown in the publication, a splitting piston is provided with a straight slitting cutting blade secured thereto, which cutting blade, as the splitting piston pushes the previous cut piece of trunk through the splitting blade, at the same time cuts the next piece off the trunk. The cut piece of trunk is turned or appropriately guided so that it is parallel to the movement of the cutting blade and can be pushed through the splitting blade. The device has been found to be very functional in terms of its operating principles and simple to implement.
However, the prior art has one disadvantage. While being pressed against the trunk, the slitting, oblique blade edge causes pressing forces transverse relative to the direction of movement of the splitting piston, said pressing forces requiring special arrangements. The splitting piston must be provided with an efficient and durable bearing, with roller bearings or sliding bearings in order for the splitting piston to be able to move anyway. Moreover, the splitting piston is subjected to transverse forces requiring of the structure special arrangements .
Previously known are also various guillotine- like firewood machines in which the cutting and splitting of the trunk is performed simultaneously with one blade and one movement. However, in these the power requirement is relatively big and the splitting is often only partial, so that the piece of trunk only splits at its one end and the pieces stick to one another. A serious disadvantage is also the untidiness of the cutting and splitting, in which case devices such as these are not suited for professional production of firewood.
OBJECTIVE OP THE INVENTION
It is an objective of the invention to eliminate the disadvantages referred to above.
One specific objective of the invention is to disclose a new type of cutting and splitting device, in which with a simplest possible structure and using just one power unit, the trunk can be both cut and split, but, however, so that the cutting and splitting are performed separately, in separate and controlled procedures, which is to ensure that the cutting and splitting into separate pieces are performed tidily and safely.
SUMMARY OF THE INVENTION
The cutting and splitting device according to the invention is characterized by what is presented in patent claim 1.
The cutting and splitting device is designed for cutting and splitting trunks, so it comprises both a cutting tool and a splitting tool. According to the invention, the cutting tool of the cutting and splitting device comprises two supporting frames disposed at a distance from one another, as well as in a slot between them, a plate-like blade flange which is sub- stantially of a thickness equal to said distance. In this manner, the supporting frames support the blade flange preventing its transverse movement and bending. Thus, the supporting frames can preferably consist of plate-like structures, but other types of line-like or dot-like supporting surface structures are also possible as long as they will give sufficient support to the blade flange from both sides, so that the blade flange will not bend or warp when cutting the trunk. Further, the blade flange is bearing-mounted in both supporting frames so that it is turning back and forth in the slot . In addition, the blade flange extends outside the supporting frames forming a lever structure to which the power unit which turns the blade flange is coupled. Further, according to the invention, both supporting frames are provided, at the same point, with a trunk feed opening extending through them; and the blade flange is provided with a blade edge having at least the length of the diameter of the trunk feed opening. The blade edge is so arranged that when turning the blade flange about its bearing point between the supporting frames, the blade edge passes through the trunk feed opening thereby cutting the trunk that has been fed into the trunk feed opening.
Preferably, the invention uses a hydraulic cylinder as the power unit, but e.g. completely mechanical solutions are also possible. In this manner, a cam or a similar lever structure can serve as the power unit, so that it can be used to achieve the necessary back and forth motion both for cutting and splitting. Thus, the cam can be connected for example to the power take-off shaft of a tractor. In this man- ner, the cutting and splitting procedure can be made simply faster than with hydraulics.
Preferably, the bearing point or turning axis of a plate-like blade flange is disposed at the other edge thereof, and the lever structure is arranged at the opposite edge thereof. In that case, the blade edge is suitably disposed between these, and the entire structure can be made a compact whole that only takes up a little space, and the forces acting herein are under control .
Preferably, the blade edge has been so shaped and directed that as the blade edge touches the trunk being cut, it does not just cut the trunk in two but while partly moving in the longitudinal direction of the blade edge, it both presses and slits the trunk in two, which is clearly more efficient, less power requiring and leaves a tidier cutting mark than just cutting. In this manner, preferably, the blade edge is not parallel to the turning radius of the blade flange, but at an oblique angle with respect to its path of motion as it faces the trunk being cut. Further, as for the cutting of the trunk and the even distribution of forces, it is preferred that the blade edge is curved so that it first more slits the trunk and then finally more just cuts.
In a preferred embodiment of the invention, the blade flange is an angular plate having a cutting aperture in the middle area thereof, the edge of which cutting aperture forms the blade edge. In this manner, the blade flange can be made very stiff and it also keeps its shape.
In cutting wood in a slitting manner it is important that the piece of trunk being cut is allowed to turn or bend when cutting. This is to ensure that the blade will penetrate into the trunk when cutting. For the same reason, when cutting in a slitting manner, the trunk cannot be slit from both directions si- multaneously because in that case the blades would press the trunks against one another and thereby prevent efficient operation of the blades. In this manner, preferably, the edges of the trunk feed opening of the supporting frames form supporting surfaces that do not penetrate into the trunk, and the trunk is supported by the supporting frames as the blade edge is pressed against the trunk from the opposite side. In this manner, the edges of the trunk feed opening preferably form even edges, the width of which corresponds to the thickness of the plate to be used. It is even possible that the edges have been broadened from the thickness of the plate so that it is ensured that the trunk being cut is not allowed to be pressed against the edge, but the cutting is performed from just one direction by the slitting blade.
In a preferred embodiment of the invention, the plate-like supporting frames form the load-bearing and force-receiving body of the cutting and splitting device, on which the other end of the hydraulic cylinder is supported. In this manner, preferably, as the body consists of two plates, between which the cutting blade moves, in cutting a trunk, the force effects caused by both the hydraulic cylinder and the cutting blade are directed to the device body so that they are parallel to the plates. In addition, as both the hydraulic cylinder and the cutting blade are supported between the plate frames and in the middle, no transverse forces are directed to the body.
In one embodiment of the invention, the splitting tool is provided with a splitting piston connected to the motion of the hydraulic cylinder, the splitting piston being arranged throughout a splitting groove to push a cut piece of trunk through the splitting blade. Preferably, the splitting groove and the splitting piston which moves along it are parallel to the device body i.e. parallel to the direction of op- eration of the hydraulic cylinder. In this manner, the splitting piston is easy and simple to couple so as to operate together with the operation of the hydraulic cylinder. In that case, however, the device must be provided with suitable turning elements, turning guides or a turning track, by means of which a piece of trunk that has been cut transversely can be made to turn lengthwise and drop into the groove. It is also possible that the splitting groove and the splitting piston are transverse i.e. disposed in the feed direction of the trunk. In that case, the pieces of trunk that will drop are disposed in the right direction with respect to the splitting groove. In that case, however, suitable levers, chains or similar arrangements must be used to deflect the movement of the hydraulic cylinder to suit the splitting piston. This, however, also considerably increases the size of the structure of the cutting and splitting device in the lateral direction. Also, in this embodiment, the hydraulic cylinder can be replaced with a suitable mechanical structure .
As the splitting blade in the device it is possible to use blades, known per se in the field, which split a piece of trunk into two, four or more parts. In a similar manner, for each case specifically, the splitting blades can be either fixed or ones to be manually or automatically adjusted. In another embodiment of the invention, the splitting tool is provided with a splitting wedge fitted into the surface of the blade flange, near the blade edge. This kind of splitting wedge known per se, which is to be used in a slitting blade, splits the trunk substantially at the same time as it cuts it. This solution, which is simple per se, does not, however, satisfy all the purposes of the invention because the splitting cannot always be performed satisfactorily, but the piece of trunk only splits at its one end while the other end remains intact. Thus, a better solution is to use a splitting blade through which the entire piece of wood is pushed using a splitting piston.
It is also possible that in striving for a very efficient and fast cutting of the trunk, the blade edge with its splitting wedges has been fitted at the two opposite edges of the cutting aperture of the blade flange. In that case, the cutting aperture of the blade flange has been arranged to move over the trunk feed opening to its both sides, whereby the cutting and splitting procedures are performed with move- ments directed to both ends of the blade flange.
The cutting and splitting device of the invention has several advantages over the prior art. The cutting and splitting device is as simple and reliable as possible in terms of its structure and operations; with just one hydraulic cylinder that performs all the functions. It is even possible that the same hydraulic cylinder provides power for both the trunk feed table and the conveyor belt by which the chopped wood bits are lifted into a heap or a trailer.
LIST OF FIGURES
In the following section, the invention will be described in detail referring to the attached draw- ing, in which
Fig. 1 schematically represents one cutting and splitting device as seen from the side; and
Fig. 2 schematically represents another embodiment of the invention.
DETAILED DESCRIPTION OF THE INVENTION
Fig. 1 schematically represents one embodiment of the invention as seen from the side. Therein, the body of the cutting and splitting device consists of two adjacent supporting frames i.e. straight metal plates disposed at a distance of about 10mm from one another. The plates have a wider round-shaped rear end, which then gets narrower to form the flatter front part of the body. The slot between the supporting frames 1 is provided with a blade flange 2 bearing-mounted between them from a bearing point so as to turn back and forth. In this embodiment, the blade flange is round-shaped, although its shape is not essential for the operation of the device. On the opposite side of the bearing point 3 of the blade flange 2 there is a lever 4 which extends outside the supporting frames 1. Connected to the lever 4 is the piston rod 14 of the hydraulic cylinder 5 while the hydraulic cylinder itself is connected to the front part of the body. In the middle region of the wider rear end of the supporting frames 1 there are round-shaped trunk feed openings 6 in both plates, the diameter of which openings defines the thickness of the thickest trunk to be handled. Near the trunk feed openings in the blade flange 2 there is a cutting aperture 8, having a curved blade edge 7. On the opposite side of the blade edge 7, the edge of the trunk feed opening 6 forms supporting surfaces 9, against which the trunk is pressed when cutting it. Beneath the supporting frames 1 there is provided a splitting piston 10 to be moveable along a splitting groove 11. At the end of the splitting groove there is a splitting blade 12, whose height position can be adjusted depending on the fact of whether there is a wish to split the wood in two or four. The splitting piston 10 is connected to a hydraulic cylinder 5 by a lever structure 14, enabling straightforward motion of the splitting piston irrespective of the curved, back and forth rising and fal- ling motion of the lever 4. In addition, from the vicinity of the trunk feed openings 6, in the feed direction, from the other side of the openings, curved guides 15 guide and turn the cut piece of trunk into the splitting groove. The drawing does not show the control of the cutting and splitting device in detail, but it can be implemented in many various ways known per se . Once the trunk has been pushed through the opening 6 against the adjustable measuring stopper disposed behind it, the hydraulic cylinder can function automatically so that it turns the blade flange 2, whereupon the trunk will snap. A trunk that has been pushed far enough can also be cut by manual control or e.g. with a foot pedal. Once the trunk has been cut, a piece of trunk will drop in the right direction into the splitting groove 11 under the control of the guides 15, and the splitting piston 10 will get out of the way. In that case, when cutting the next trunk, with the same movement of the hydraulic cylinder, the splitting piston pushes the piece of trunk through the splitting blade 12 splitting it in two or four parts, depending on the height set to the blade 12.
Fig. 2 shows another embodiment of the invention, where there are the same parts as for the cutting of the trunk as in the embodiment of Fig. 1, so they are not repeated in this connection. The split- ting piston and the parts associated with it in the embodiment of Fig 1 have been replaced in this second embodiment with a splitting wedge 13 disposed in the blade flange 2 near the blade edge 7. The splitting wedge is disposed substantially in the direction of motion of the blade flange 2; that is, it penetrates the piece of wood substantially simultaneously with the slitting blade edge 7, thereby splitting at least the one end of the piece of wood. In this manner, in this embodiment, the cutting and the splitting are performed substantially simultaneously, so there is no need for a separate splitting that would be performed at the second step.
The drawings describing the embodiments of the invention are schematic and simplified, so they do not show the possible parts or tools supported on the supporting frames 1 that are known per se and obvious to a person skilled in the art. Parts or tools such as these can include wheels or supports supported by which the device rests on the floor, such as a drawbar by which the device is drawn like you draw a trailer; a three-point linkage by which the device is connected to the rear of a tractor; a combustion motor or an electric motor coupled to a hydraulic pump; various feeding grooves or other arrangements for feeding the trunk manually or mechanically into the cutting and splitting device; as well as various conveyors or belts by which the chopped wood bits are moved or guided e.g. directly into a trailer.
The invention is not limited merely to the examples of its embodiments referred to above, but many modifications are possible within the scope of the inventive idea defined by the claims.

Claims

1. A cutting and splitting device for cutting and splitting trunks, the cutting and splitting device including a cutting tool and a splitting tool, c h a r a c t e r i z e d in that the cutting tool comprises two supporting frames (1) at a distance from one another, as well as in a slot between them, a blade flange (2) having substantially the thickness of said distance; the blade flange is bearing-mounted (3) in the supporting frames so as to turn back and forth in the slot, and the blade flange extends outside the supporting frames thereby forming a lever structure (4) , to which the power unit (5) which turns the blade flange is coupled; and the supporting frames are provided with a trunk feed opening (6) extending through them, and the blade flange is provided with a blade edge (7) having at least the length of the diameter of the trunk feed opening, the blade edge being arranged to pass through the trunk feed opening, when turning the blade flange, to cut the trunk that has been fed into the trunk feed opening .
2. The cutting and splitting device as de- fined in claim 1, c h a r a c t e r i z e d in that the blade flange (2) is an angular plate having in the middle area thereof a cutting aperture (8) , the edge thereof forming the blade edge (7) .
3. The cutting and splitting device as de- fined in claim 1 or 2, c h a r a c t e r i z e d in that the edges of the trunk feed apertures (6) form supporting surfaces (9) that do not penetrate into the trunk, and the trunk is supported on them as the blade edge (7) is pressed against the trunk from the oppo- site side.
4. The cutting and splitting device as defined in any one of claims 1 - 3, c h a r a c t e r - i z e d in that the power unit (5) is a hydraulic cylinder .
5. The cutting and splitting device as defined in any one of claims 1 - 3, c h a r a c t e r - i z e d in that the power unit is a cam or a similar lever structure.
6. The cutting and splitting device as defined in any one of claims 1 - 5, c h a r a c t e r i z e d in that the blade flange is bearing-mounted at its one end and the lever structure (7) is arranged at its opposite edge while the blade edge (7) is disposed between these in the blade flange.
7. The cutting and splitting device as defined in any one of claims 1 - 6, c ha ra c t e r - i z e d in that the plate-like supporting frames (1) form the body of the cutting and splitting device, in which body the other end of the hydraulic cylinder (5) is mounted.
8. The cutting and splitting device as de- fined in any one of claims 1 - 7, c h a r a c t e r i z e d in that the splitting tool is provided with a splitting piston (10) connected to the motion of the power unit (5) , the splitting piston being arranged throughout a splitting groove (11) to push a cut piece of trunk through the cutting blade (12) .
9. The cutting and splitting device as defined in claim 9, c h a r a c t e r i z e d in that the splitting tool is provided with a splitting wedge (13) fitted in the surface of the blade flange (2) near the blade edge.
10. The cutting and splitting device as defined in claim 9, c h a r a c t e r i z e d in that the blade edge with its splitting wedges has been fitted at two opposite edges of the cutting aperture of the blade flange to implement the cutting and splitting function with movements directed to both ends of the blade flange.
EP06830922A 2005-12-21 2006-12-20 Cutting and splitting device Withdrawn EP1968774A4 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FI20090286U FI8627U1 (en) 2006-12-20 2009-07-30 Klabbmaskin

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI20051311A FI20051311A0 (en) 2005-12-21 2005-12-21 Pilkekone
PCT/FI2006/000416 WO2007071814A1 (en) 2005-12-21 2006-12-20 Cutting and splitting device

Publications (2)

Publication Number Publication Date
EP1968774A1 true EP1968774A1 (en) 2008-09-17
EP1968774A4 EP1968774A4 (en) 2008-12-10

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP06830922A Withdrawn EP1968774A4 (en) 2005-12-21 2006-12-20 Cutting and splitting device

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EP (1) EP1968774A4 (en)
FI (1) FI20051311A0 (en)
WO (1) WO2007071814A1 (en)

Cited By (1)

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CN108908616A (en) * 2018-06-22 2018-11-30 李炀 A kind of agricultural quick splitting machine of bavin wood

Families Citing this family (1)

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Publication number Priority date Publication date Assignee Title
NO343453B1 (en) * 2018-03-23 2019-03-18 Roald Kverneland Wood chopper device for cutting and splitting wood

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US4160470A (en) * 1978-03-13 1979-07-10 Timbern, Ltd. Log shearing and splitting device
US4313480A (en) * 1979-06-15 1982-02-02 Poentelin Jaakko Firewood chopper
DE3108634A1 (en) * 1981-01-14 1982-08-26 Tuikola Oy, 21250 Masku Device for cutting up wood
EP0260051A1 (en) * 1986-09-12 1988-03-16 Knight, David John Log cutting machine
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WO2005072924A1 (en) * 2004-01-22 2005-08-11 Agromaster Oy Cutting and splitting device

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US4160470A (en) * 1978-03-13 1979-07-10 Timbern, Ltd. Log shearing and splitting device
US4313480A (en) * 1979-06-15 1982-02-02 Poentelin Jaakko Firewood chopper
DE3108634A1 (en) * 1981-01-14 1982-08-26 Tuikola Oy, 21250 Masku Device for cutting up wood
EP0260051A1 (en) * 1986-09-12 1988-03-16 Knight, David John Log cutting machine
US4896574A (en) * 1988-09-26 1990-01-30 Hull Harold L Self sharpening wood log slicer
US5492159A (en) * 1995-01-04 1996-02-20 Maloshicky; Henry Log-cutter splitter
WO2005072924A1 (en) * 2004-01-22 2005-08-11 Agromaster Oy Cutting and splitting device

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Title
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108908616A (en) * 2018-06-22 2018-11-30 李炀 A kind of agricultural quick splitting machine of bavin wood

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EP1968774A4 (en) 2008-12-10
WO2007071814A1 (en) 2007-06-28
FI20051311A0 (en) 2005-12-21

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