FR2512490A1 - CUTTING TOOL, ESPECIALLY RABOT OR HAVING TOOL - Google Patents

Abstract

CUTTING TOOL, IN PARTICULAR PLANE OR HAVING TOOL, INCLUDING A PIC 1, A PIC SUPPORT 2 AND A DEVICE FOR FIXING THE PIC 1. THE ROD 4 OF THE PIC 1 HAS A RECESS 10 OPEN ON THE FOOT OF THE ROD 4, IN V-SHAPED INVERTED AND EXTENDING CROSS-VERSALLY TO THE DIRECTION OF WORK, THIS RECESS DELIMING A FRONT ELASTIC BRANCH 12 AND A REAR FIXING BRANCH 13. THIS ARRANGEMENT ALLOWS SHOCKS AND BLOWS SUBJECT TO THE HAVAGE PIC DURING ITS OPERATION, THANKS TO THE ELASTICITY OF THE BRANCHES DELIMITED BY THE RECESS.

Description

The present invention relates to a cutting tool,

  including a cutting tool or a planer, intended to be used

  This tool includes a shearer spike, a spike holder, and a detachable attachment device for the shearer's peak, wherein the shearer's spike is inserted into a recess of the spike carrier, and this spindle comprises a stop housing having a clamping surface, with which the clamping tie of the spike support is engaged.

  We know that shearing tools and planes are often

  put in the course of their use to efforts resulting from shocks and considerable blows This frequently leads to premature damage or even to the fall of hard metal plates, including the cutting surfaces of the plane and the peak of

shearers are garnished.

  The object of the invention is to eliminate these disadvantages.

  The object of the invention is to produce a cutting tool,

  in particular a plane or a cutting tool of the kind described above.

  above, in which the peak is mounted in its support in

being cushioned against shocks.

  According to the invention, this problem is solved by the fact that in the cutting tool, in particular plane or cutting tool, the stem of the peak has a notch extending at the foot of this rod and open to this foot, and which comprises a separation plane disposed transversely to the direction of work, so that an elastic limb located on the front side and an attachment branch on the

c Backside.

  The Commission is of the view that,

  the use of the shear peak, a moment of rotation is created, by which the surface of the rod, located forward in the direction of work, is pressed in particular in the

  zone of his foot, against the corresponding surfaces of the

  of the rod provided in the support of the peak,

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  all the more so because by its rear surface, the shearing peak rests, in its upper zone of transition between the body and the stem of this peak, against the housing of the rod in the support, which widens by forming A stopper According to the invention, the spike rod is subdivided by the notch extending transversely to the working direction, a front branch and a rear branch are formed, so that the front branch performs the function. elastic arm in view of the compressive forces acting at this point, this branch having a cross-sectional dimension, corresponding to the recess, while the rear branch, considerably relieved, can fulfill the function of a branch of fastening, comprising a stop housing for the spring-loaded clamping tie of the removable fastening device The resilient branch allows reciprocating movement damped against the shocks of the shearing spike, when it is subjected to knocks or shocks around a pivot axis extending transversely to the direction of work on the backside of the shearing spike, in the transition zone of the spike body and of the stem of the peak, thanks to the support of the kind abutment or buttress at this place, in the housing of the stem and against the support of the peak It is important

  in the context of the invention, that the stem of the spike itself

  even does not consist of a solid material as in the constructions known hitherto, but after completion of the recess or notch according to the invention, the spike rod is in a position to be able to perfectly withstand the efforts developed during the use of the spike This results in a work of the cutter peak cushioned against shocks, so we no longer have to fear premature damage or even that the platelets in

  Hard metal constituting the cutting surface will not come off.

  These advantages are the main ones provided by the invention.

  Other important features of the invention will be described below. Thus, the invention preferably provides that the recess is V-shaped.

  inverted, according to the principle of O support of the same solidity.

  In this way, the impact damping effect is improved because the elastic action of the elastic limb is

  particularly intensive This is further achieved by

  According to the invention, the recess has a concave inner surface at least of the elastic leg. The elastic branch is also resiliently shaped like a spring just in the region of its end foot applied under pressure against the spring. corresponding surface of the recess of -the rod, and this elastic arm compriseson the body of the peak, a reinforced cross section According to another characteristic of the invention, there is provided on the top of the V constituting the recess, a groove clamping ring narrowing in the transition zone, for clamping the connecting strut of a rivet into an elastically flexible material such as rubber or a synthetic material. This rivet made of an elastically flexible material provides damping of the transverse displacements of the spike. In fact, a game is regularly inevitable between the stem of the peak and the recess of the stem, and therefore between the shear peak and the peak support, for manufacturing technique reasons The transverse movements of the shear and peak spindle in the stem recess, which result, are intercepted by means of the rivet provided by the invention, which therefore prevents the occurrence of vibrations as it occurs in the rigid connections made to date, or at least greatly reduces these vibrations Finally, the clamping groove at the top of the V of the recess prevents

a bad hacking effect.

  Other peculiarities and advantages of

  will appear in the description that goes

  follow, made with reference to the accompanying drawings which illustrate

  trent an example of non-limiting embodiment.

  Figure 1 is a side elevation kill

  a cutting tool consisting of a cutting tool,

  with partial cut of the support of the peak.

  Figure 2 is a top view of the tool

of Figure 1.

  Figure 3 is a cross-sectional view

  of the tool of Figure 1 in the area of a rivet.

  There is shown in the drawings a cutting tool consisting of a cutting tool comprising a shearing spike 1, a spike support 2 and a removable attachment device 3 for the shearing spike 1. It is known to use such a cutting tool. hacking on havers, chains or the like The hacking direction is indicated by the arrow The hastening peak 1 is arranged

  by its rod 4 in a recess 5 of the support 2 of the peak.

  the stem 4 of the peak comprises a stop cut 6 having an inclined clamping surface 7, in which a clamping tie 8 mounted in the support 2 of the pick is engaged, this pulling 8 bearing on the clamping surface 7 inclined The tightening tie 8 can be pulled back against the counteracting action of a return spring 9 by a lever or the like, so that the securing device 3 is released and the shearing spike 1 can be removed. exchanged The rod 4 of the peak has an open recess or notch on the foot of the rod and which extends on this foot, this recess 10 having a separation plane

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  11 extending transversely to the direction of work.

  As a result, the rod 4 of the spike is divided into an elastic branch 12 of the front side and a fastening branch 13 of the rear side. The main forces developed during the operation of the shearing spike 1 are indicated by arrows and immediately show in a clear manner. that a torsional moment occurs by the effect of which the shearing peak 1 bears on the rear side, is applied

  under pressure against the corresponding surface 14 of the

  5 of the rod by its elastic branch 12, in particular

  in the foot zone of this elastic branch, which

  thereby fulfills a shock absorbing function.

  Correlatively the forces developed by the blows and shocks on the hard metal plates 15, the cutting surface of the shearer peak 1 is coated, are

  considerably reduced, and in all cases are softened.

  The notch 10 is made of inverted V and has a concave inner surface at least on the side of the elastic branch 12. As a result, the elastic effect of the elastic branch 12 is further increased. Furthermore, a clamping groove 16 is provided. in the top of the V of the recess 10 in the transition zone, to allow the clamping insert 17 of a rivet 18 to be inserted into an elastically flexible material such as rubber or a synthetic material, so that that the shearing peak 1 also receives a transverse support and that the transverse movements which occur as a result of the usual game are also damped Naturally, also in this case, the elastic branches 12 and 13 act elastically and damping the shocks, because during the operation of the peak of shearer 1, the volume corresponding to the freedom of movement or the game is filled with suitable material At the same time the peak of shearer 1 is maintained in good working order, which guarantees the

  possibility of an easy and fast exchange.

Claims (5)

  A cutting tool, in particular a planer or cutter, comprising a shearing spike (1), a spike support (2) and a removable attachment device for the spike (1), wherein the shearing spike (1) ) is arranged in a recess of the support (2) of the peak by its rod (4), the latter comprises a cut-off having a clamping surface on which a tie rod (8) of the support (2) of the peak (1), characterized in that the rod (4) of the peak (1) comprises a notch (10) extending at the foot of this rod and open to this foot, and which comprises a separation plane (11). ) extending transversely to the direction of work, and thereby constitute a branch   elastic strap (12) and a rear attachment arm (13).   2 cutting tool according to claim 1, characterized in that the recess (10) is inverted V-shaped.   Cutting tool according to one of the claims   1 and 2, characterized in that the recess (10) has a concave inner surface of at least the side of its branch. elastic.   4 cutting tool according to one of the claims   i to 3, characterized in that a clamping groove (16) is formed in the apex of the V of the recess (10), this groove narrowing in the transition zone and being adapted for clamping the spacer link (17) of a   rivet (18) of an elastically flexible material.