ISO 24652:2023 球面滑り軸受 — 作動油パワーシリンダ用球面滑り軸受ロッドエンド | ページ 2

Foreword

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This document was prepared by Technical Committee ISO/TC 4, Rolling bearings, Subcommittee SC 7, Spherical plain bearings, in collaboration with Technical Committee ISO/TC 131, Fluid power systems, Subcommittee SC 3, Cylinders.

Introduction

In hydraulic fluid power systems, power is transmitted and controlled through a fluid (liquid) under pressure within an enclosed circuit.

One component of such systems is the fluid power cylinder. This is a device that converts power into linear mechanical force and motion. It consists of a moveable element, i.e. a piston and a piston rod, operating within a cylindrical bore.

The spherical plain bearings rod ends are used on piston rods of hydraulic cylinders for mechanical transmitting the cylinder force under oscillatory rotational and tilting movements. The design of the spherical plain bearing rod ends is based on the maximum forces resulting from the specified internal diameter of the cylinders and pressure according to the ISO 6020 series and ISO 6022.

The dimensions and tolerances specified in this document have been selected to permit the design and use of spherical plain bearings rod ends which incorporate radial spherical plain bearings having various sliding material combinations. These spherical plain bearings can be requiring maintenance (steel/steel or steel/bronze), maintenance-free [e.g. steel/polytetrafluoroethylene (PTFE)] and/or sealed.

Type D and Type E from this document are in the scope of ISO 8132 and ISO 8133.

1 Scope

This document specifies designs, dimensions, tolerances and technical requirements of spherical plain bearings rod ends for hydraulic fluid power cylinders.

The specified tolerance values apply to finished spherical plain bearing rod ends before any coating, plating, ring splitting or fracturing.

2 Normative references

The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.

3 Terms and definitions

For the purposes of this document, the terms and definitions given in ISO 1132-1, ISO 5598, ISO 6811 and the following apply.

ISO and IEC maintain terminology databases for use in standardization at the following addresses:

3.3

angle of tilt of bearing

α

permissible angular displacement of the inner member relative to the outer member of a spherical plain bearing or rod end

Note 1 to entry: See Figure 1.

Figure 1 — Angle of tilt of a bearing

Note 2 to entry: Attention is drawn to the fact that after mounting a spherical plain bearing rod end on a shaft, the angle through which the rod end can tilt can be restricted by design of adjacent components.

[SOURCE:ISO 6811:1998, 03.02.01, modified —"of bearing" has been added to the term and, Figure 1 and Note 1 to entry have been added.]

Bibliography