JPS5847894A - Cutting tool, particularly, planing or cutting tool - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION A device is provided for the removable mounting of the cutting pick and the cutting pick, in which the big shaft of the cutting pick is inserted into the shaft receptacle of the pick holder and The invention relates to a cutting tool, in particular a planing or cutting tool, in which the pick shaft has a locking recess with a clamping surface, in which a clamping pin of the pick holder is seated.

As is well known, planing and cutting tools are exposed to significant impact and impact stresses during use. .

This often results in premature damage or even in the flying off of the hard metal sheets mounted on the cutting surface of the planing and cutting bin. Here the invention provides an auxiliary means.

The object of the invention is to provide a cutting tool, in particular a planing or cutting tool, of the type mentioned at the outset, in which the beak operates with shock damping in the beak holder.

In a cutting tool of the kind mentioned at the outset, in particular a planing or cutting tool, this object is achieved according to the invention as follows. That is, the pink shaft has a knurled notch extending towards the shaft foot and opening at the shaft foot, the knurled notch having a separating surface extending transversely to the working direction, and A front elastic leg and a rear fixed leg are formed.

The present invention is based on the following knowledge.

In other words, during use of the cutting pick, a torque is generated that presses the front shaft surface of the pick shaft in the working direction, especially in the leg region, against the corresponding support surface of the shaft assembly receptacle of the pick holder, and the rear shaft surface It is all the more important to note that the support of the cutting pin is carried out against the shaft assembly of the pick holding body which is widened to form a support here in the area where it passes from the pick body to the pick shaft. A similar torque is generated.

Based on the division of the pick axis carried out according to the teachings of the invention by a knurled notch extending transversely to the working direction,
The front and rear legs are formed, and the compression that occurs here fulfills the function of an elastic leg due to the corresponding cross-sectional dimensions of the front leg, taking into account the forces, while after being unloaded to a considerable extent. The side legs can perform the function of fixed legs, which fixed legs have a locking cutout for a pin for removable mounting and spring-loaded tightening of the device. According to elastic legs,
Inside the shaft accommodating part or against the big holder (for table-like support, in the transition range from the pink shaft to the big body!) A rocking motion extending transversely to the working direction on the rear side of the broken big A shock-damped rotational movement of the cutting pick in the event of shock stress around the axis is possible.In contrast to conventional constructions, the pick shaft itself does not have to consist of solid material (the knurling according to the invention When making a notch, the load of inserting the pick to remove insects can be absorbed without any problem, and the shock absorption work of the cutting pick is also taken into consideration, so there is no early damage to the hard metal plate piece that forms the cutting surface. It is also important within the framework of the invention that there is no longer any risk of splashing.Here is an important advantage obtained by the invention.

Other main features of the invention will be described below.

According to the invention, it is desirable to form the knurling notch as an inverted V-shaped notch according to the same strength support scheme. In this way, the spring action of the elastic legs is particularly strong, so
The impact damping effect is further improved. Furthermore, this means that
According to the present invention, there are fewer notches (which is reasonable considering that the elastic leg side has a concave inner surface. Therefore, the elastic leg can be pressed against the corresponding support surface of the shaft assembly part It is elastically formed in the area of the bent leg end and has a thick cross-section in the big body.Furthermore, according to the invention,
At the V-shaped apex of the knurled notch, a tightening groove is arranged which narrows in the transition area for accommodating the connecting piece of the double-headed knob made of flexurally elastic material. The bend-resilient double-headed knob is adapted to damp lateral movement of the cutting bib within the pick holder. In practice, play between the pink shaft and the shaft receptacle, and therefore between the cutting beak and the beak holder, is usually unavoidable due to manufacturing engineering reasons. The resulting lateral movements of the cutting bick or pick shaft in the shaft housing are absorbed by the double-headed knob according to the invention, which furthermore prevents vibration phenomena such as occur in conventional rigid connections and at least significantly reduced. Finally, a tightening groove at the ■-shaped apex of the knurled notch prevents any disadvantageous cutting action.

Embodiments of the present invention will be described below with reference to the drawings.

The figure shows cutting tools such as a cutting block 1 and a block holder 2.
, and a removable mounting for the cutting pin p1 in the device 3
A cutting tool is shown. Such cutting tools are used in a known manner in cutting rollers, cutting chains, etc. The cutting direction is indicated by an arrow. The pinot shaft 4 of the cutting beak 1 is inserted into the shaft receiving recess 5 of the beak holder 2. The pickup shaft 4 has a locking notch 6 with an inclined clamping surface 7, in which a clamping pin 8 supported in the pickup holder 2 is fitted, and Here the inclined clamping is in contact with the surface 7. After this tightening, the pin 8 can be pulled back by a tool or the like against the action of a return spring, so that the mounting device 3 can be loosened and the cutting beak can be replaced. The big shaft 4 has a knurled notch 0 extending toward the shaft leg and open therein, which knurl has a separating surface 11 extending transversely to the working direction. As a result, the pink shaft 4 is divided into a front elastic leg 12 and a rear fixed leg 13. The main forces acting during operation of the cutting pick I are indicated by the arrows, and the elastic leg 12 of the cutting pick I supported on the rear side, and especially in the leg region of this elastic leg, is affected by the shaft receptacle. It can be readily seen that a torque is generated which presses against the corresponding support surface 14 of 5 and thereby performs a shock damping function. Therefore, the impact and impact stress acting on the hard metal plate piece 15 provided on the blade surface of the cutting pick l is considerably reduced and in any case is absorbed softly. The notched notch 10 is formed as an inverted square notch, and has a concave inner surface at least on the elastic leg side. The spring action of the elastic legs 12 is thereby further increased. Furthermore, a groove 16 is arranged at the ■-shaped apex of the notched notch 1O to sandwich the connecting piece 17 of the double-headed knob 18 made of a bending elastic material such as rubber or plastic, so that the tightening becomes narrower in the transition range. , the cutting pick should be supported laterally, or lateral movements occurring due to normal play should be damped as well.

Of course, in this case too, the elastic legs 12 and 13 preferentially act elastically and in a shock damping manner. This is because, during operation of the cutting pick 1, the play space is filled with fine material. At the same time, the cutting pick l is usually commercially available, so that easy and quick replacement is guaranteed.

[Brief explanation of the drawing]

FIG. 1 is a side view showing a cutting tool as a cutting tool according to the present invention together with a bib holder partially shown in cross section, FIG. 2 is a plan view of the tool shown in FIG. 1, and FIG. FIG. 3 is a cross-sectional view of the area of the double-headed knob shown in the figure; l...Cutting pick, 2...Bick holding body, 3...
・Install the device, 4...Pink shaft, 5...Shaft mounting receptacle,
6... Locking notch, 7... Tightening is a surface, 8... Tightening is a bottle, 10... Knurled notch, 12... Elastic leg, 1
3...Fixed leg patent applicant: Ernst, Braun
Gerd, Braun, Nibelhard, Fraun
Dietrich, Brown, Patent Attorney 1) Representative
Continuing from page 1 of Osamu Dots Applicant: Dietrich Braun, Federal Republic of Germany, 4300 Etssen-Heisingen Hofackerstrasse 12A

Claims (1)

[Claims] (11) A cutting pick, a pick holder, and a removable mounting device for the cutting pick are provided, in which the pink shaft of the cutting pick is located in the shaft receptacle of the pick holder. The pick holder has a locking notch with a surface, and the pick holder has a locking pin inserted into the cutout, and the big shaft is used for cutting tools, especially planing. Or in a cutting tool, the big shaft (4) has a knurled notch (lO) extending towards the shaft foot and opening at the shaft foot, the knurled notch extending transversely to the working direction. has an elongated separation surface and thereby separates the front elastic leg (12) and the rear fixed leg (13).
A cutting tool, in particular a planing or cutting tool, characterized in that it is formed with a (2) The tool according to claim 1, wherein the notch (lO) is formed as an inverted V9-shaped notch. (3) The tool according to claim 1 or 2, wherein the knurled notch (10) has a concave inner surface at least on the elastic leg side. (4) Because the connecting piece (17) of the double-headed knob (18) made of bendable elastic material is inserted into the V-shaped apex of the notch (10), the groove (16) becomes narrower in the transition range. A tool according to one of the claims 1 to 3, wherein the tool is arranged.