DE457701C

DE457701C -

Info

Publication number: DE457701C
Application number: DENDAT457701D
Authority: DE

Description

Die Erfindung bezieht sich auf Radialbohrmaschinen, bei denen eine Außensäule, die den . Ausleger trägt, drehbar auf einer festen Innensäule angeordnet ist und in der richtigen Stellung durch einen geschlitzten konischen Klemmring festgestellt wird; die. Erfindung bezieht sich sowohl auf die Einrichtung zum Festklemmen als auch auf die Lagerung der Außensäule.The invention relates to radial drilling machines in which an outer column that the . Boom carries, is rotatably arranged on a fixed inner column and in the correct Position is determined by a slotted conical clamping ring; the. invention refers to both the clamping device and the storage of the External pillar.

ίο Die Abb. ι zeigt die bisherige Ausführungsform derartiger Säulenlagerungen und -fest-Stellungen. ίο The Fig. ι shows the previous embodiment of such column bearings and fixed positions.

α ist die Innensäule, b die äußere Säule. Die Außensäule b wird durch einen an einer Stelle aufgeschlitzten, doppelt konischen Klemmring c, der sich um die entsprechenden Außenkonusse d und e der beiden Säulen legt, fest mit der Innensäule α verbunden. Das Anziehen des Klemmrings erfolgt in der α is the inner column, b the outer column. The outer column b is firmly connected to the inner column α by a double-conical clamping ring c which is slit open at one point and which is placed around the corresponding outer cones d and e of the two columns. The clamping ring is tightened in the

Regel durch eine Schraube. An dem oberen Ende ist ein Spurkugellager zur Aufnahme des Längsdruckes (senkrecht nach unten) und ein Halskugellager zur Aufnahme des seitlichen Druckes vorgesehen. Unten ist ein Rollenlager zur Aufnahme des seitlichen Druckes angebracht. Der Klemmring c legt, sich nun beim Klemmen einerseits an den Konus der Innensäule, anderseits an den Konus der Außensäule Die Klemmwirkung ist offenbar um so günstiger, je kleiner der Winkel α des Klemmrings gemacht wird.Usually by a screw. At the upper end there is a ball bearing to absorb the longitudinal pressure (vertically downwards) and a neck ball bearing to absorb the lateral pressure. At the bottom there is a roller bearing to absorb the lateral pressure. The clamping ring c now rests against the cone of the inner column on the one hand and the cone of the outer column on the other. The clamping effect is evidently the more favorable, the smaller the angle α of the clamping ring is made.

Diese Vorrichtung hat jedoch den Nachteil, daß durch das Festklemmen die Außensäule nach unten gepreßt wird, und so auf die Kugeln des Spurlagers ein zusätzlicher Druck hervorgerufen wird, welcher natürlich ungünstig wirkt; dieser Druck wird um so größer, je kleiner der Winkel α wird. Da man einen zu hohen Druck auf das Spurlager vermeiden muß, so mußte man'sich bisher mit einem großen Winkel a. begnügen, trotzdem man der guten Klemmwirkung halber den Winkel α gerne kleiner gemacht haben würde.However, this device has the disadvantage that by clamping the outer column is pressed down, and so an additional pressure is produced on the balls of the thrust bearing, which of course has an unfavorable effect; this pressure becomes greater the smaller the angle α . Since you have to avoid too high a pressure on the thrust bearing, you have had to use a large angle a. content, despite the fact that the angle α would have been made smaller for the sake of good clamping effect.

Die Erfindung vermeidet diese Übelstände und gestattet, einen beliebig schwachen Konus und demgemäß eine beliebig starke Klemmwirkung zu nehmen, ohne das Spurlager zu belasten.The invention avoids these inconveniences and allows any weak cone and accordingly to take an arbitrarily strong clamping effect without loading the thrust bearing.

DieErfindung besteht darin, daß die Außensäule mit einem oder mehreren Paaren entgegengesetzt geneigter Konusflächen versehen wird, gegen die sich die entsprechenden Gegenkonusse des Klemmrings anlegen, so daß die auf die Konusflächen . ausgeübten. Axialdrucke einander aufheben; durch-geeignete Anordnung der Konusflächen in bezug auf die Gegenkonusflächen läßt sich sogar erreichen, daß beim Anziehen ein geringes Anheben der Außensäule und somit eine völlige Entlastung des Spurlagers stattfindet. Dies kann dadurch erreicht werden, daß man den Konusflächen bei gleicher Steigung verschiedenes Spiel oder bei verschiedener Steigung gleiches Spiel gibt. Da die Festklemmung der Außensäule nicht nur bezweckt, eine Drehung zu verhindern, sondern auch Außensäule und Innensäule so starr miteinander zu verbinden, daß die beiden Säulen zwecks Materialersparnis sichThe invention consists in having the outer column with one or more pairs oppositely inclined conical surfaces is provided against which the corresponding mating cones of the clamping ring so that the on the conical surfaces. exercised. Axial pressures cancel each other; by-suitable arrangement of the conical surfaces with respect to the Counter-conical surfaces can even be achieved that when tightening a slight lifting of the Outer column and thus a complete relief of the thrust bearing takes place. This can be done by can be achieved that the conical surfaces with the same slope different game or there is the same clearance for different inclines. Since the clamping of the outer column is not only intended to prevent rotation, but also outer column and inner column like that rigidly to connect with each other that the two columns in order to save material

Claims

behave against bending stress like a single carrier, so effected according to the invention the clamping ring at the same time an axial bracing of the two columns against each other. this happens according to the invention that the foot of the outer column with a. Pair opposite inclined conical surfaces is provided, and that the two opposite conical surfaces on the two pillars len pulled together by the actual clamping ring, while at the same time the conical surfaces of the two columns facing each other are spread apart by a conical expansion ring will. For this purpose, according to the invention, a tightly fitting slotted inner ring is in the outer clamping ring inserted from triangular cross-section.

To simplify the construction, the thrust bearing is also omitted and according to the invention instead the lower neck bearing was replaced by an angular contact ball or angular roller bearing.

The figures show embodiments of the invention, namely Fig. 2 a Longitudinal section through the two pillars, Fig. 3 and 4 the terminal points on a larger scale, one time with angular contact ball bearings, the other time with angular contact roller bearings.

/ is the inner column, g is the outer column.
The outside pillar is. Provided at the lower end with a conical flange, the upper conical surface with n, the lower conical surface with. tu is designated. The inner column is provided with a corresponding conical flange, the upper conical surface of which is denoted by I and the lower conical surface of which is denoted by 0. To the. The clamping ring h, which is slit open at one point and whose conical recess corresponds to the conical surfaces η and 0, lies in the conical flanges. The expanding ring i, which is also divided and has a triangular cross-section, is tightly but loosely inserted into the clamping ring h , the conical surfaces of which correspond to the surfaces m and /.

When tightening the clamping ring // it simultaneously drives the expansion ring / "into the conical groove ni, I.

The play between the conical surfaces is dimensioned so that the expansion ring i first comes into play and the outer column is raised by a small amount so that. the ball bearing ρ at the lower end of the column is relieved. Immediately afterwards the conical surfaces of the clamping ring h also come to rest on the surfaces η and 0 , so that the conical flange of the outer column between the expanding ring i and the upper half of the clamping ring, the conical flange of the inner column between the expanding ring i and the lower half of the clamping ring h are tightly braced.

The security against turning is particularly good in that when the columns are rotated against each other, friction would have to occur on two surfaces, compared with only one friction surface in the old design; take z. If, for example, the expansion ring and clamping ring are secured against rotation on the outer column, friction would occur in the surfaces / and 0 when rotated.

In order to be able to absorb the axial pressure at the same time, the lower bearing is designed either as an angular contact ball bearing ρ according to Fig. 3 or as an angular roller bearing />'according to Fig. 4.

Of course, one of the surfaces of a pair called "conical surfaces" can always degenerate into a flat ring surface, e.g. B. in the example shown, the areas n and 0; furthermore, instead of the flanges, the columns can have conical grooves and the clamping rings in this case have corresponding conical ribs, etc.

Pa τ ε ντ ans v r ü c η ε:

ι. Bearing of the outer column of radial drilling machines that can be fixed by means of a conical clamping ring, characterized by conical clamping surfaces (■; /, in) arranged in pairs on the outer column (g), preferably also by the same (7, 0) on the inner column (f). ■

2. Bearing of the outer column of radial drilling machines that can be fixed by means of a conical clamping ring according to claim 1, in which paired conical clamping surfaces are provided both on the inner and on the outer column, characterized in that in the slotted clamping ring which contracts the two columns in the axial direction ( A) drive the columns apart in the axial direction; -the slotted expansion ring (i) is tightly but loosely inserted.

3. Mounting of the outer column of Radial drilling machines according to claims τ and 2, characterized by such mutual Arrangement of the conical surfaces that when tightening the clamping ring a small Lifting of the outer column takes place.

4. Use the conical clamping ring to fix it adjustable mounting of the outer column of radial drilling machines according to claim J

to 3, \ l characterized in that omitting a special support bearing one of the bearings is designed as an angular ball or as an angular roller bearing.

1 sheet of drawings.