SI22599A - Rotation head with cutting wires of portable motor scythe - Google Patents

Abstract

The rotation head of a lightweight (portable) motor scythe according to the invention wears cutting elements (1) executed from metal, preferentially steel wire, fastened into plugs (3) which in turn are pivotably inserted between the plates (4) and (5). The said plates are pressed together by a nut (6). Such an execution of the motor scythe head offers a set of advantages, when compared to the existing ones, first of all the possibility of quick and easy change of cutting elements (wire (1)) and practically non-wear cutting elements.

Description

Alojz Tomazin

ROTATION HEAD WITH BUTTER WIRE OF PORTABLE MOTOR HAIR

DESCRIPTION OF THE INVENTION

The subject of the invention is a rotary head of a lightweight (portable) motorcycle, hereinafter referred to as a hairpiece. This is an integral part of said piece in which the cutting elements are attached. In existing heads, these are steel or plastic knives or a cutting thread, hereinafter called a thread. The essential shortcomings of the existing heads are as follows:

• Complicated replacement of cutting threads.

• Poor thread utilization: About 30 to 40% of the length of the thread is unused due to the way the thread is fastened to the head and is a waste.

• Tightening of the thread, which does not reduce the impact of the thread against a hard object that it cannot cut through. This causes, especially if the thread gets hit close to the head, tearing off the thread;

• Due to high wear and tear, the filaments often need to be lengthened or extended. tampering, which takes a lot of valuable time for the user.

• Torn pieces of thread pollute the environment.

• Steel rotary blades are not suitable for mowing small grass, and in contact with hard objects, e.g. with rocks or rocks, they produce powerful shocks that are burdensome or even dangerous to the mowers.

• In the case of mowing tall grass, it wraps around the drive shaft of the head, making them difficult to mow, which often has to be removed from the head.

• The noise level they cause is relatively high.

The head according to the invention resolves these disadvantages in a manner which will be described in detail below in the embodiment and shown in the figures showing:

FIG. 1 cross sectional view of the invention,

FIG. 2 is a top view of the invention from below, in the direction of arrow "A" in FIG. 1,

FIG. 3 cutting wire according to the invention,

According to the invention, the aforementioned disadvantages are solved by the implementation of cutting elements (1) made of metal, preferably steel wire, flexibly attached to the head.

Said design of the cutting elements (1) is practically inadmissible in comparison with the plastic thread, which means that there is no need to waste valuable time during mowing to change or lengthen the thread, nor does the environment be burdened with scrapped pieces of plastic material like this happens very intensely when the thread is used.

As mentioned above, each cutting element according to the invention is mounted flexibly in all directions, especially in the circumferential direction (head rotation) of the invention, which is essential for its smooth operation. With such an engagement, the centrifugal force forces the cutting element (1) in the radial direction during rotation of the head, and upon impact against a solid object (thicker tree stem, stone, etc.), said element (1) is applied to mitigate the impact. Otherwise, the metal wire would become deformed (twisted) quickly and thus lose its cutting ability.

According to the invention, this is solved by inserting the respective cutting wire (1) into the corresponding plug (3), the latter being inserted into the bore (4.1) in the support plate (4), rotating therein with respect to its longitudinal axis (x), which is also the axis of said bore. The latter is oriented parallel to the axis of rotation of the entire head of the hair. A cylindrical nozzle (8) fixed to the clamping plate (5) coaxially with said pin (3) prevents the cutting wire (1) from falling in the direction of said axis (x), and also allows said flexible mounting of the cutting element (1). The support plate (4) and the clamping plate (5) are jointly pressed together with the clamping nut (6), the two said plates pressing together the aforementioned plug (3) and the attachment (8) so that the cutting wire (1) from the plug (3) ) cannot fail.

Said cutting wire (1) is made at one end with a locking element (1.1) which prevents it from falling out due to centrifugal force during rotation of the head. Preferably, said locking element (1.1) is arranged in such a way that the cutting wire is twisted at one of its two ends by a few millimeters, and other embodiments are possible which do not change the essence of the invention, e.g. such that the cutting wire is thickened at this point or secured (by screwing or by plastic deformation) to another object, e.g. metal tube.

When one of the cutting wires (1) is to be inserted or removed, the clamping nut (6) is unscrewed, and (due to the operation of the spring (7)) the clamping plate (5) moves away from the support plate (4) so that the plug is also spaced apart. (3) and nozzle (8). The latter allows inserting or removing the cutting wire (1) into the stud (3).

PATENT APPLICATIONS

Claims (1)

The rotary head of a lightweight (portable) motor cutter, hereinafter referred to as the cutter head, which is an integral part of said cutter, in which the cutting elements are fixed, characterized in that the cutting elements (1) are made of metal, preferably steel wire. The rotary head of a lightweight (portable) motorcycle according to the first claim, characterized in that said cutting elements (1) are clamped flexibly, rotatably in the head. The rotary head of a lightweight (portable) motorcycle according to the second claim, characterized in that the cutting wire (1) is screwed into the corresponding pin (3) and the latter is inserted into the rotary head (4), more precisely between the support plate (4) and the clamping plate (5), fixed rotatably. The rotary head of a lightweight (portable) motorcycle according to the second claim, characterized in that the cutting wire (1) prevents the cylindrical attachment (8) being fixed and coaxially with the plug (3) attached to the clamping plate (5) by the cutting wire (1). . The rotary head of a lightweight (portable) motorcycle according to the first claim, characterized in that the cutting wire (1) is made at one end with a locking element (1.1) which prevents it from falling out due to centrifugal force during rotation of the head. The rotary head of a lightweight (portable) motorcycle according to the fourth claim, characterized in that the locking element (1.1) is preferably arranged in such a way that the cutting wire is twisted at one of its two ends by several millimeters, and its different embodiments are also possible which do not change the essence of the invention, e.g. such that the cutting wire (1) is thickened at this point or secured to it (by screwing or by means of plastic deformation) of another object, e.g. metal tube.