Vehicle mechanical self-locking oil cylinder

Abstract

The invention discloses a vehicle mechanical self-locking oil cylinder. The vehicle mechanical self-locking oil cylinder comprises a cylinder body, wherein a piston rod is mounted at the inner side of the cylinder body; a self-locking cylinder barrel is mounted at the lower part of the cylinder body; a cover plate is mounted at the lower end of the self-locking cylinder barrel; a self-locking spring is mounted at the inner side of the cover plate; the lower end of the self-locking spring is connected with the cover plate; a self-locking piston is mounted at the lower part of the inner side of the self-locking cylinder barrel; the lower end of the self-locking piston is connected with the self-locking spring; a fixed base is mounted at the lower part of the cylinder body, and is positioned at the upper side of the self-locking cylinder barrel; the lower side end part of the fixed base fits the self-locking cylinder barrel; multiple self-locking pieces are mounted at the inner side of the self-locking cylinder barrel, and are positioned between the fixed base and the self-locking cylinder barrel; the upper part of the piston rod fits the cylinder body; the middle part of the piston rod fits the fixed base; and the lower end of the piston rod fits the self-locking piston. The vehicle mechanical self-locking oil cylinder realizes automatic mechanical self-locking of the oil cylinder under the precondition of not changing an oil way of the oil cylinder, generates pressing force to workpieces, and is compact in structure, small in volume and reliable and stable in self-locking function.

Description

technical field [0001] The invention relates to an oil cylinder, more precisely a self-locking oil cylinder for automobile machinery. Background technique [0002] The existing oil cylinder adopts a pressure-maintaining self-locking oil cylinder. This method is not strictly a mechanical self-locking. It is to maintain pressure in the compression chamber of the oil cylinder to fix the compression position of the piston rod. This pressure-maintaining self-locking oil cylinder is unreliable, because the oil pressure in the compression chamber changes with the change of the ambient temperature, there may be leakage in the compression chamber, the oil is compressible, and the compression force generated by the oil cylinder cannot resist the workpiece The vibration of the existing threaded self-locking oil cylinder is to add a section of thread and a nut to one end of the piston rod. When the oil cylinder presses the workpiece, the nut is tightened to fix the pressing position of ...

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Problems solved by technology

This pressure-maintaining self-locking oil cylinder is unreliable, because the oil pressure in the compression chamber changes with the change of the ambient temperature, there may be leakage in the compression chamber, the oil is compressible, and the compression force generated by the oil cylinder cannot resist the workpiece The vibration of the existing threaded self-locking oil cylinder is to add a section of thread and a nut to one end of the piston rod. When the oil cylinder presses the workpiece, the nut is tightened to fix the pressing position of the oil cylinder. This method cannot be realized automatically. Manual operation, low efficiency, relatively large human factors

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