FR2532400A1 - MACHINE SUPPORT - Google Patents

Abstract

MACHINE SUPPORT, CONSISTING OF A BODY 1 IN STEEL OR ALUMINUM, A HOUSING 2 MILL IN THE BODY 1 AND A MASS OF HARDENED SYNTHETIC RESIN 3 FILLING THE HOUSING, IN WHICH ARE FLOODED HARD BODIES RECTIFIED OVER PART OF THEIR HEIGHT. THE HARD BODIES 4 ARE CONSTITUTED BY BEARING NEEDLES WHICH ARE ARRANGED IN THE SUPPORT RANGE 5 PERPENDICULAR TO THE DIRECTION PROVIDED FOR THE BEARING OF A BEARING CAGE.

Description

The present invention relates to a flat or cylindrical support

  drique for machines of various types, in which the support is subjected to high stresses and heavy wear, while having to meet high requirements with regard to the accuracy of the bearing surface

plane or cylindrical.

  It is known to soak staves of support

  steel, and to rectify them after tempering It can not be absolutely excluded that after rectification

  end of new harmful phenomena and warping

  may appear in the material as a result of

  the heat Finally it is possible that due to hyper-

  local quenching especially in case of insufficient lubrication, cracks appear on the surface when the material is subjected to the load for which it is intended. It is known from patent application DT OS 30 12 487 to provide a support bearing of this type formed of a housing made of a steel body or the like and a mass cast in the housing and self-hardenable under appropriate conditions, in which are drowned in large numbers of hard bodies arranged against each other, and in particular bearing balls that are rectified

  on part of their height after hardening of the mass.

  This makes it possible to obtain only a reduced part of the entire bearing surface, namely that of the respective cross-sections, subject to the stresses.

  from the final grinding of a hardened surface.

  The known bearing surfaces which are made by means of hardened ground bodies embedded in a cured mass and irregular periphery or in the form of balls, however, have the disadvantage, particularly when it comes to hard bodies in the form of balls. that high compression stresses, point or linear, can cause the detachment of individual hard bodies-of mass and their 2. tilting due to balls or needles ball bearings or rolling needles on the surface, or sliding on it due to insufficient lubrication, when the stress is applied away from the center of the hard body, causing the destruction of the bearing range. The object of the invention is to improve the known bearing surfaces so as to avoid the detachment and tilting of hard bodies embedded in the mass and caused by rolling movements which apply constraints.

punctual or linear.

  This goal is achieved by arranging elongated hard bodies perpendicular to the needle roller direction

on the scope of support.

  With regard to hard bodies, preference is

  bearing needles which are embedded in a known mass, hardenable and cast in a support bed, perpendicular to the rolling direction, and then

  rectified on part of their height after hardening

  is lying. Advantageously, the rolling needles are offset relative to one another, which makes it possible to obtain linear compression stresses, which appear for example when a needle of all those arranged in a rolling cage simultaneously bears against several neighboring bearing needles in a different position in the bed, compensate and reduce each other.

  hard and the destruction of the support range.

  Advantageously, lubrication orifices are made in the bearing surface between the hard bodies.

  ducts pass through the bed of the body.

  The invention will be better understood with reference to the appended drawing in which: FIG. 1 represents a known bearing bearing surface, FIG. 2 represents a bearing bearing surface according to FIG. 1, which has been subjected to a linear-and-moving compression stress of 8.5 tons by a needle bearing, FIG. 3 represents a bearing surface according to the invention, FIG. 4 is a sectional view of a support according to the invention.

the invention -

  As can be seen in Figures 3 and 4, the support is constituted by a steel or aluminum body 1 whose shape is adapted to that of the machine, in which was milled

  a rectangular housing 2 whose depth is 2.4 mm.

  The housing is filled with a curable synthetic resin 3 of known type, in which bearing needles 4 are arranged offset relative to one another by half their length, and have been ground to reduce their height. original 4 mm at a height of 2.6 mm In the bearing surface 5 are formed the orifices of-lubrication 6 whose ducts 7 pass through the

housing 2 and the body 1.

  Tests have shown that alternate stresses applied by means of a needle roller cage that

  it is rolled perpendicular to the longitudinal direction

  tudinal rolling needles embedded in the mass for twenty four hours and during 43,200 vibrations of

  the load, the maximum load being 49 to 50 tons, did not

  caused no deformation of the bearing span,

Claims (3)

  1 Machine support, consisting of a body (1) made of steel or aluminum, a housing (2) milled in the body (1) and a mass of hardened synthetic resin (3) filling the housing, in which are embedded bodies hardened on a part of their height, characterized by the fact that the hard bodies - (4) are constituted by rolling needles which are arranged in the bearing surface (5) perpendicular to the direction intended for the rolling a cage of bearings.   2 machine support according to claim 1, characterized in that the hard bodies (4) are offset by compared to others.   3 support according to claim 1, characterized in that lubrication holes (6) are provided in   the bearing surface (5) and include lubrication ducts.   (7) passing through the housing (2) and the body (1).