SU1606769A1 - Ball-bearing rolling-contact support for translation and rotation - Google Patents

Abstract

The invention relates to mechanical engineering, in particular to a ball bearing for translational and rotational movements, and can be used in machine tools, robots, auto operators and other mechanisms. The purpose of the invention is to increase reliability by reducing friction losses. The ball bearing consists of a housing 1, a shaft 2 and a separator 3 located between them with rolling elements in the form of rollers 4 and balls 5. The balls 5 are located in circulation channels formed by the side surfaces of the rollers 4. The width of the gap between adjacent rollers 4 is smaller than the diameter of the balls 5. Balls 5, transferring the load, are located between adjacent rollers 4 and the shaft 2. Balls 5, not transferring the load, are located with a gap between the housing 1 and adjacent rollers 4. The separator is made in the form of a thin-walled cylindrical tube 7, to the ends of which oh attached ring elements 8. Semicircular grooves are located between the ends of the adjacent rollers. In the windows 11 of the separator 3, longitudinal bridges 12 are made in the form of rectangular plates, arched U-shaped in the direction of the axis of the support. Such a design reduces the sliding friction between the rolling bodies and the separator, since the load is transmitted only through the rolling bodies and is not perceived by the separator. 1 hp f-ly, 4 ill.

Description

The invention relates to mechanical engineering and can be used in the nodes of machines, robots, etc.

The purpose of the invention is to increase reliability by reducing friction losses.

In FIG. 1 shows a support, a section; in FIG. 2 is a section AA in FIG. one; on figs - section BB in fig. one; on iq of FIG. 4 - separator.

The ball bearing includes a housing 1, a shaft 2 and a separator 3 located between them, in which the rollers 4 and balls 5 are placed. The rollers 4 are mounted in the separator 3 parallel to the shaft 2 with the possibility of rotation and contact with the cylindrical surface! housing 1. The centers of the balls 5 are in a plane passing through the axis of the shaft and between two adjacent rollers 4, the axes of which are equidistant from this plane (BB plane). Sha. Ricks 5 are placed in closed circulation channels formed by the lateral Y-25 / Ф formula of the invention with the surfaces of the rollers, the balls transmitting the load are located in the longitudinal section between the shaft 2 and adjacent rollers 4 and are in contact with them, and the balls that do not transfer the load are located in another a longitudinal section, between two adjacent rollers 4 and the housing 1 and in the transition sections made in the semicircular wad ^ recesses 6. The separator 3 is made in the form of a thin-walled cylindrical tube 7, to which two rings are attached from the ends element 8. The ends of the cylindrical tube 7 are included in the annular grooves 9 complete. The lobes are fixed to the side of the tube 7, rectangular windows 11 are provided in which the rollers 4 are placed, and the gap between the adjacent rollers 4 is less than the diameter of the balls 5. In the axial direction, the rollers 4 are fixed by ring elements In the windows 11 are made rectangular bridges 12, curved U-shaped towards the axis of the support. These jumpers ί prevent the rolling elements from falling out of the separator 3 in the absence of a shaft 2. In the cylindrical tube 7, holes 13 ^ are made and on the jumpers 12 of the recess 14, which allow the passage of balls 5 during circulation.

Ball rolling support works as follows.

With the translational movement of the shaft 2, the balls 5 move in the same direction, but with a lower speed. Balls 5, transferring the load, push the unloaded balls 5. Thus, the circulating balls · 5 ₉ In this case, the rollers 4 and the separator 3 remain stationary. The load from the shaft 2 through the balls 5 and the rollers 4 is transferred to the housing 1. When the shaft i 2 is rotated, the load transfer balls 5 interact with the rollers 4. In this case, the separator 3 together with the balls 5 and rollers-4 rotates in the direction of the arrow.

In the proposed support, sliding friction between the rolling bodies and the separator is significantly reduced, since the load is transmitted only through the rolling bodies and is not perceived by the separator.

, vyv ring elements 8. is carried out using 10, the bays of which are bent shaft. In cylindrical

8.

I

Claims (2)

B 1. Ball bearing for translational and rotational movements, comprising a housing, a shaft, a running gear in the form of working, return and transition rows of balls, as well as dividing rollers installed with the possibility of contact with the housing, characterized in that, in order to increase reliability by reducing friction, it is equipped with a separator located coaxially with the shaft between the working and return rows of balls, the centers of the working and return rows of balls are located on a straight line connecting the centers of the balls to the shaft center, p separating rollers are placed in the circumferential direction between the longitudinal rows of balls, the distance between the lateral surfaces of the rollers along the circle line connecting the centers of the rollers is smaller than the diameter of the balls, the balls of the return row are installed with a clearance relative to the rollers, and the working row is contactable, the separator is made of thin-walled tubes with rectangular windows for rollers and holes for the passage of balls located at the ends of the tube between the 'rectangular windows. 2. The ball bearing according to claim 1, distinguished by the fact that, in the windows of the separator, the limiters for moving the rollers in the radial direction are made in the form of U-shaped rectangular-shaped plates ”