FI105582B - Peat mill - Google Patents

Description

! 105582

TURVEJYRSIN

The invention relates to a peat cutter as defined in the preamble of claim 1.

Traditionally, a peat cutter consists of, for example. 5 long drums with blades of appropriate shape on the surface, which, when rotating the drum and pulling along the surface of the marsh, cut off a layer of peat of a certain thickness. Rotary mills based on rotary and movable milling members have, above all, their inherent complexity and high maintenance costs due to their construction.

The drawbacks of the prior art have been largely eliminated in a peat milling mill according to Finnish Patent No. 58340, in which the body acting as an equalizing blade is articulated with milling blades which are spring-loaded against the surface of the mire. This device also has some drawbacks. The milling peat layer often has relatively hard points that should also be able to mill. On the other hand, the milling peat layer 20 may have, for example, rocks or stumps over which the milling blades must bend without breaking the blades. These requirements for a turntable are even somewhat contradictory and their adaptation to a turntable according to Finnish patent 58340. , 25 meen is awkward. If the milling blade is made sufficiently yielding, it will not mill all the peat intended for milling. Again, if a sufficiently strong spring is used to turn the blade downward to handle all of the milling peat, the blade will not be sufficiently springy in rocks and other obstacles, whereby the blade and its joint with the body will be damaged and worn out relatively quickly.

The object of the invention is to eliminate the above-mentioned drawbacks. In particular, it is an object of the present invention to provide a new type of peat cutter that is as simple and maintenance-friendly as possible. paa and which mills a hard layer of peat effectively «2 105582, while avoiding the blades without breaking hard places unsuitable for milling.

As regards the features characterizing the invention, reference is made to the claims section.

The peat cutter according to the invention comprises an elongated body extending transversely along the surface of the bog and a plurality of milling blades spaced apart in the frame over the entire working width of the cutter. According to the invention, the milling blade is fixed to the body via a bending tension spring. Preferably, the flexural tension spring is arranged to be flexible in a vertical plane parallel to the movement of the turntable, whereby S, C or 9-15 shaped springs of substantially flat iron or material may be used as the spring.

The peat cutter construction according to the invention is based on the fact that the milling blade is not rigidly attached to the body of the device in any direction but rests on the body through a spring of a resilient element. Hereby, very rigid springs can be used and the blade can also flex to some extent laterally, even if the main spring direction of the spring is in the vertical plane parallel to the movement of the turntable. Because very rigid springs can be used, the blades also mill hard hard peat, over which the conventional peat tiller rises and leaves untreated, which makes the marsh surface uneven and difficult to handle further.

In addition, due to the structure and characteristics of the flexural tension spring, the blade at its end undergoes a relatively free, limited oscillatory movement during milling which, in addition to hardly compressing the spring, significantly improves the blade's ability to bite into the hard peat layer. However, when the blade hits a stone 35 or similar hard point, the spring gives way in the required direction, that is, backward and upward, preventing damage to the blade.

«105582 3

In one embodiment of the invention, the blade at the end of the spring comprises only one, essentially transverse, friction-throwing blade with a cutting edge at the bottom. In another embodiment of the invention 5, peat-ejecting blades are provided at substantially opposite directions, i.e. transverse directions, with cutting edges at the lower edges of each of the blades.

In one embodiment of the invention, the elongated body of the peat cutter 10 forms a leveling wire which is pulled along the surface of the mire to level the surface of the mire and at the same time determines the working depth of the blades supported therein. In another embodiment of the invention, the elongated body comprises wheels or similar members on which the turf mill is pulled along the workable bog surface.

Since the cutter blades preferably have to work as evenly and uniformly as possible over the entire working width of the peat cutter, the cutter blades are arranged in two successive rows. Thus, the working widths of the blades can be easily covered to cover the entire width of the turf mill.

The peat cutter according to the invention has significant advantages over the prior art. The Jyr-25 sim does not have any rotating, pivoting or articulated parts, but all movements and elasticities are based solely on the elasticity of the flexural tension springs used. This way, the design of the mower harrow is very simple, reliable and maintenance-free. The flexible structure and oscillating action of the springs allow for efficient milling in hard marshes and over the obstacles of elasticity required. In addition, due to the new flexibility and vibration properties, the mower cutter does not clog and has no raking effect, so it is extremely reliable and maintains a smooth and good working quality.

4, 105582

In the following, the invention will be described in detail with reference to the accompanying drawings, in which Figure 1 is a top view of a portion 5 of a peat cutter according to the invention;

Figure 1 illustrates an embodiment of the invention in which the body of a turf cutter comprises two long beams 1, each of which is provided with a plurality of bending tension springs 3 with milling blades 2 at their ends, thus providing two rows 7 and 8 of turf milling the blades.

The blades are alternately positioned in the frame beams so that their working width even overlaps or at least completely covers the entire width of the area to be treated.

Fig. 2 is a view from the end of the body 1 substantially of the structure of a peat cutter corresponding to Fig. 1. The front and bottom edges of the body 1 form a leveling web 6 which is pulled along the surface of the mire. The body 1 has fasteners 11 for three-point point attachment to a drive machine. In addition, the frame has two support beams 12 to which the flexural tension springs 3 are attached.

The bending tension springs 3 are so arranged and dimensioned that they extend substantially to the level of the lower surface of the alignment 30 Lan 6, thereby below them. the protruding and secured blades 2 extend to the peat layer underneath the caliper ... Thus, the leveling blade 6 in conjunction with the setting of the blades 2 determines the thickness of the milling peat layer. 3 shows in more detail a bending stress spring 3 according to the invention and a blade 2 therein. The bending stress spring 3 of a flat iron is 105582 5 substantially in the form of 9. The circular upper part of the spring has a substantially straight end 13 having - mounting holes 14 for securing the spring to the turf mill body. From here, the spring runs in the driving direction 5 of the turret, curving backwards up and forward and obliquely downward along a substantially straight portion 15, after which the spring turns back to a substantially horizontal lower end 16.

Below the lower end 16 is attached a triangular vertical plate 10, i.e. a bevel 9, which increases in height to the rear. It has a bevelled sharp edge at its bevelled lower edge 10. From the vertical rear edge of the chamfer 10, a wing 4 extends obliquely rearward and sideways, the horizontal lower edge of which forms a tex 15 ridge 5. A stiffener 17 is secured to both The blade 4 is tilted rearwardly at its upper edge so that the blade better throws swinging peat both backwards and upwards.

When the blade of Fig. 3 is used in a peat cutter, the bending tension spring 3 is attached to the cutter body such that the straight lower end 16 of the spring is substantially at the height of the upper surface of the peat to be milled. The bevel 9 and the incisive front edge 25 10 therein are then pressed into the milling peat. The bevel 9 may also be un sharpened at its leading edge, since its primary purpose is to guide and lift the blade over hard objects. The cutting edge 5 of the bevelled wing 4 cuts into the milling peat layer, puts it off, and 30 turns it and throws it backwards in a soft and fluffy manner.

.. The forces exerted on the blade 4 cause the bending tension spring 3 to vibrate, particularly in the vertical plane parallel to the movement of the turret cutter, but also to some extent in the lateral direction. This oscillation significantly increases the peat-cutting effect of the steel edge 5 as well as the loosened peat 6 105582 becoming more volatile and airy, which is essential for the peat to dry on the marsh surface.

The invention has been described above by way of example only with reference to the accompanying drawings, in which various embodiments of the invention are possible within the scope of the claimed inventive concept.

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Claims (10)

105582 1. For milling the peat layer of a turf mill, 'the turf mill has a elongated body 5 (1) extending across the surface of the mire and a plurality of milling blades (2) spaced apart, characterized in that the milling blade (2) 1) via bending tension spring (3). Peat rotary harrow according to claim 1, characterized in that the bending tension spring (3) is arranged flexible in a vertical plane parallel to the movement of the rotary harrow. Peat roller according to Claim 1, characterized in that the bending tension spring (3) is essentially an S, C or 9-shaped spring. Peat roller according to Claim 1, characterized in that the blade (2) at the end of the spring comprises a one-way peat-throwing blade (4) with a cutting edge 20 (5) at its lower edge. Peat roller according to Claim 1, characterized in that the blade at the end of the spring comprises two-way peat-throwing blades with cutting edges at the lower edges. Peat cutter according to claim 1, characterized in that the elongated body (1) forms a leveling wire (6) which is pulled along the surface of the mire. A peat trimmer according to claim 1, characterized in that the elongated plow - ·. size includes wheels. Peat milling machine according to claim 1, characterized in that the peat milling machine comprises two rows (7, 8) of alternating milling blades in different rows such that the cutting edges of the cutting edges of the blades continuously cover the peat milling machine. the entire working width. «105582 Peat cutter according to Claim 1, characterized in that the cutter blade has a chamfer (9) for lifting the blade over obstacles. Peat roller according to Claim 9, characterized in that the lower edge of the chamfer (9) includes a sharp incised edge (10). «· T