A floating bearing cylinder

Abstract

The invention relates to a floating supporting oil cylinder. The floating supporting oil cylinder comprises a cylinder body, an ejection device and a supporting clamping device, wherein the ejection device comprises a base, an ejection piston, an ejection rod, a back spring and a supporting rod; the base is provided with a piston channel; the ejection piston is positioned in the piston channel; the ejection rod is fixed with the ejection piston; the back spring is sleeved on the ejection rod; the supporting rod is pushed by the ejection rod; the supporting clamping device comprises a supporting piston and an elastic body; the supporting piston is positioned in the cylinder body; the elastic body is sleeved between the supporting rod and the supporting piston; the inner surface of the supporting piston and the outer surface of the elastic body are respectively an inner conical surface and an outer conical surface which are matched with each other; and steel balls are arranged between the inner conical surface and the outer conical surface. The floating supporting oil cylinder is characterized in that a hollow cylindrical boss is arranged at the lower end of the supporting piston and extends in the piston channel of the base; and the upper end of the ejection rod is matched with the supporting rod after penetrating in the cylindrical boss. The supporting force can be obviously increased under the condition that the cylinder diameter and the pressure are not changed, and the purpose of small size and large supporting force under the condition of low pressure is realized.

Description

technical field [0001] The invention relates to a supporting oil cylinder, in particular to a hydraulic floating supporting oil cylinder which can increase the supporting force of a workpiece by increasing the force-bearing area of ​​the piston. Background technique [0002] The hydraulic floating support cylinder is mainly used in mechanical processing. After being in contact with the workpiece to be processed, it generates a supporting force on the workpiece to reduce the vibration of the workpiece during processing and prevent the deformation of the workpiece. A device that provides floating auxiliary support for processing workpieces. For example, the Chinese Patent Authorization Announcement No. CN201513409U discloses a hydraulic support cylinder structure, which includes: a hydraulic support cylinder body, a rising piston (extrusion piston) installed in the body, and a plunger pushed by the rising piston (support rod), plunger spring (ejection spring), and a collet (e...

AI Technical Summary

Problems solved by technology

[0005] Secondly, in the existing hydraulic floating bearing oil cylinder, the opposite surface of the support piston and the collet (elastomer) is a matching smooth tapered surface, so that the steel ball is in point contact with the elastic body and the support piston respectively. Such a structure As a result, the ball receiving stress between the steel ball and the elastic body and the support piston is relatively large, which will reduce the bearing capacity of the support cylinder to a certain extent, and at the same time shorten the service life, and affect the mechanical properties of the material used for the collet (elastomer). High characteristic requirements, otherwise the service life will be shorter

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