RU2243426C1 - Rolling bearing mechanism - Google Patents

Abstract

FIELD: mechanical engineering.

SUBSTANCE: mechanism has housing provided with the opening for the rolling bearing, rolling bearing, shaft provided with the spring-loaded nut with projections, and locking ring. The outer race of the bearing is made of the housing provided with a bore with supporting bevels. The inner race is made of the shaft and bushing mounted on the shaft to form bearing bevels. The bushing is mounted in front of the spring-loaded nut and rotates together with the shaft, but it can move longitudinally. The bearing bevels of the housing, shaft, and bushing are provided with balls set in the cage.

EFFECT: improved design and enhanced reliability.

1 dwg

Description

The alleged invention relates to mechanical engineering and can be used as backlash-free rolling bearings of mechanisms.

Known rolling bearings of mechanisms [1], consisting of an outer ring, an inner ring and balls. Such support structures have axial and radial clearances, which increase during operation due to wear of parts, and this worsens the accuracy characteristics of the mechanism as a whole.

Also known is the rolling bearing [2], selected for the prototype, consisting of a mechanism housing with an opening for a rolling bearing, a rolling bearing, a mechanism shaft on which a spring-loaded nut with protrusions and a retaining ring are placed. The clearance in the specified rolling support is selected by constantly tightening the nut with a spring.

The disadvantage of this technical solution is that it can only be used in mechanisms with two rolling bearings. It is impossible to use it in mechanisms and devices with one rolling support, such as, for example, in the traction of a parallelogram of the ZU-23 installation [3], which connects the sight with the cradle. In this device, at light loads, high accuracy is required, which, when using conventional bearings, cannot be maintained during the service life.

The alleged invention solves the problem of creating a backlash-free rolling support, which can be used in mechanisms with a single rolling support.

To solve the problem in a rolling bearing, comprising a mechanism housing with an opening for a rolling bearing, a rolling bearing, a mechanism shaft on which a spring-loaded nut with protrusions and a retaining ring are placed, it is new that the mechanism housing has a function of the outer ring of the bearing, in the opening of which a groove is formed with supporting bevels. The function of the inner ring of the bearing is performed by bearing bevels having a shaft and a sleeve mounted on it in front of the spring-loaded nut. The sleeve is mounted on the shaft with the possibility of rotation with it, as well as the possibility of longitudinal movement. At the same time, it is constantly supported by a spring-loaded nut. On the supporting bevels of the mechanism body, shaft and sleeve, balls are installed in the separator.

The use of support bevels of the mechanism body, shaft and sleeve, pressed by a spring-loaded nut, as racetracks for balls provides due to the spring-loaded nut a constant selection of backlash without a second support, which makes it possible to create devices with one backlash-free rolling support.

The alleged invention is illustrated by graphic materials, where the figure schematically shows the rolling bearing in section.

The rolling bearing includes a housing 1 of the mechanism with a hole in which a groove is made with supporting bevels. A shaft 2 is located in the housing opening, at the stage of which a support bevel is formed. On the shaft, for example, with the help of a key 3, a sleeve 4 is installed, on the front end of which a support bevel is made. The sleeve is constantly supported by a nut 5 due to the action of a spring 6 installed on the shaft end between the nut and the locking ring 7. Balls 9 are installed on the supporting bevels in the separator 8. Using the nut 5, the gaps between the supporting bevels and balls are selected, and due to the constant action springs on the nut provides a clearance-free connection, including during operation, despite the wear of parts.

Sources of information

1. Orlov P.I. Design Basics: Reference and methodological manual. Prince 2. M.: "Engineering", 1988, pp. 404-435.

2. Patent RU 2199040 C2, 7 F 16 C 25/08 prototype.

3. 23 mm twin unit 3U-23, Service manual, p. 74, Album of drawings to the service manual, p. 65. M .: Military publishing house of the Ministry of Defense of the USSR, 1961.

Claims (1)

A rolling bearing comprising a mechanism housing with an opening for a rolling bearing, a rolling bearing, a shaft of a mechanism on which a spring-loaded nut with protrusions and a retaining ring are located, characterized in that the function of the outer ring of the bearing is performed by the mechanism housing, in the opening of which a groove with supporting bevels is made, and the function of the inner ring of the bearing is performed by the shaft and the sleeve installed on it in front of the spring-loaded nut, with the support bevels formed on them, and the sleeve, rotating together with the shaft, is fixed with zmozhnostyu longitudinal movement, and on the bevel support housing, the shaft and the sleeve has balls mounted in the separator.