FR2554666A1 - TOOL, PARTICULARLY FOR AN APPARATUS FOR Tillage - Google Patents

Abstract

THIS TOOL FOR EQUIPMENT ALLOWING THE WORK OF THE SOIL AND, MORE PARTICULARLY, FOR ROTARY HARROWS, INCLUDES AN UPPER PART 1 DESIGNED TO BE FIXED TO A SUPPORT, CONNECTED BY A CONVEX CONNECTION PART 5 TO A LOWER PART OR BLADE 2 WHICH MAKES AN ANGLE D 'APPROXIMATELY 90 WITH THE UPPER PART. THE UPPER PART IS EQUIPPED WITH A REINFORCEMENT RIB 3 AND THE BLADE IS ALSO EQUIPPED WITH A LONGITUDINAL CENTRAL REINFORCEMENT RIB 7 IN ITS EXTERNAL SIDE, THE TWO RIBS EXTENDING INTO THE CONNECTION PART, WITHOUT JOINING, IN ORDER TO GIVE THE TOOL SOME LOCAL FLEXIBILITY.

Description

-The present invention relates to a tool for devices allowing the

  tillage, so-called cultivators and in particular

for rotary harrows.

  The novelty of the tool according to the invention lies in its special shape which makes it possible to achieve a significant saving of energy during operation while it is not

  in no way affected the robustness of the machine.

  Due to the ever more mechanized mechanization of agricultural techniques, the use of work machines

  soil, such as strawberries, harrows and the like

realizes at the same rate.

  These machines, although they have been known for a very long time, are continuously subject to modifications and improvements. Particular attention is paid to tools because they are subject to wear and maximum forces,

  since they act directly on the ground. By con-

  sequent, to any improvement brought to the corresponding tools-

  lays better yield and greater efficiency of

  the machine as a whole. The problem is special-

  mentally felt in the case of rotary harrows, in which the tools are mounted on supports which each rotate in opposite directions to the adjacent tools, the trajectories of the

intersecting tools.

  Consequently, the characteristics which the tools must have are totally incompatible: on the one hand, in fact, they must be very robust so as not to be damaged when stones or the like are in their path; on the other hand, their dimensions or thickness

  must be restricted enough so that they do not

  do not stop too much energy when the machine advances.

  To solve this problem, the present invention has

  a tool for growers in general and more specifically

  especially for rotary harrows which has a structure such that it is sufficiently robust while not absorbing during

  of work that minimal energy.

  Other characteristics of the invention will appear

  on reading the description which follows and examining

  annexed drawings in which: FIG. 1 is a perspective view of a tool according to the invention; Fig. 2 is a side view of the tool of FIG. 1; and Figs. 3, 4 and 5 are sectional views of the tooth, respectively along lines A-A, B-B and C-C of the

Fig. 2.

  The tool according to the invention is essentially composed

  of two parts: a part, designated by the general reference

  line 1, designed to be able to be fixed to a support and a working part, designated by the general reference 2, which

  makes an angle of at least 90 with the first part.

  Although in the attached Figures, parts 1 and 2 are approximately orthogonal, this characteristic is not considered to be limiting since, according to

  needs, the working part of the tool can even

  orchard somewhat without the characteristics of the invention

  tion which are set out below are changed.

  Part 1 is an approximately flat element

  forced by a central rib 3 and it is provided with a pair of holes 4 which are used for mounting the bolts used

  to fix the tool to a suitable support.

  Rib 3 can be formed both in this part

  upper of plate 1 than in its lower part se-

  lon the system used to mount the tool.

  This rib, in fact, also makes it possible to position the blade on the support in question more quickly and with more

precision.

  The rib 3 extends over the entire length of the plate

  1 and also extends into the part, designated by the reference

  rence 5, which connects parts 1 and 2 together.

  The working part 2 of the tool in its lower region

  there is a flattened hexagonal cross section 6 which gradually extends upwards although the thickness

  of origin remains almost unchanged.

  An outer rib 7 extends along the part

  tool 2 from region 5 to the end -

  lower half. The function of this rib is doubi. =.

  it serves, in fact, to both stiffen and strengthen 1! blade

  2, making it sufficiently solid for the case where it

  against obstacles in its path and to move z4re-

  the clods of earth that have just been worked,

  thereby reducing the friction between the outer surface of

the blade and the ground.

  In fact since the movement of the tool is a

  combination of the rotational movement around the axis of the sup-

  port and translational movement of the whole ma-

  china, sometimes the outside surface of the blade is

  pressed against the ground during the forward movement, absorb-

  thus beating energy by friction and wearing out more quickly

dement.

  The presence of the rib 7 causes a slight displacement-

  clods worked so that the rear part of the blade no longer presses against the ground and is only used for

  make the tool robust enough.

  Thanks to this particular form, it is also possible to

  get an additional benefit.

  To avoid the inconvenience caused by rubbing

  between the blade and the ground, in fact, some tools

  naked have their work part twisted around their axis

  so as to form a certain angle of contact with the ground

  taque. However, as it is also necessary that the working part of the tooth is tilted so that the tool

  either self-cleaning, it was necessary to produce different

  rents types of tool according to the direction of rotation of the rotors on

which they are mounted.

  On the contrary, the tool according to the invention can be mounted indifferently on supports which rotate clockwise or counterclockwise, given

  that the blade 2 has its two inclined sides while the pre-

  sence of the rib allows to obtain the results which

  were previously produced by tools that were tor-

due around their own axis.

  The tool according to the invention is slightly curved near the region 5 which connects parts 1 and 2 of

  so as to be slightly convex.

  In this way, the resistant section is increased

  exactly where the greatest effort occurs.

  Finally, it should be noted that an interval between the ribs

  3 and 7, in the vicinity of the upper part of the tool,

  gives the tool itself a certain flexibility so as to avoid damage even in the case where stones or other obstacles are trapped between two rotating tools

in opposite directions.

  The above description clearly shows the advantages

  presented by the tool according to the invention. The tool, in fact,

  requires less power although its robustness is sem-

  similar to that of known tools. In addition, it is no longer necessary to produce two different types of tools depending on

  the direction of rotation of the respective supports.

  The tool is preferably made of steel but you can

  also use any other suitable material.

  The dimensions are also not considered to be limited.

  tives: for example, the length of part 1 can be greater than it appears in the drawing, which allows the use of this tool or an approximately similar tool

  on strawberries or other cultivators with ho-

horizontals.

Claims (3)

  1 - A tool for an apparatus for working the soil and, in particular   binding, for rotary harrow, characterized in that it comprises a part (1) for mounting the tool on a support and a working part (2), the two parts being reinforced by ribs (3, 7 ), a part located in the vicinity of the upper part of the working part being deprived of ribs,   to give the tool some local flexibility.   2 - A tool according to claim 1, characterized in that the working part (2) is formed by a blade having a   approximately constant thickness and width which   gradually decreases downward, a longitudinal rib   (7) being formed on the outer part of the blade, approxi- matively in its central area.   3 - A tool according to one of the preceding claims,   characterized in that the connection zone (5) between the two parts (1, 2) is convex so as to have a wider resistant section.