Automatic stretcher

Abstract

The invention provides an automatic stretcher. The automatic stretcher comprises a stretcher body, a driving device I, a driving device II, a control device and a support. The stretcher body comprisesan oil cylinder cover, an oil cylinder I, an oil cylinder II and a supporting ring which are connected in sequence. A stretching head is arranged between a piston I and a piston II. The upper portionof the stretching head is provided with a pull rod, and the lower portion of the stretching head is provided with a spur gear I. The upper and lower portions of the two sides of the supporting ring are provided with slots I and slots II. The lower portion of the interior of the supporting ring is provided with a moving ring spur gear II. The four sides of a reduction gearbox IV in the driving device II are fixed to the outer sides of the slots II of the supporting ring, and an output gear IV of e driving device II is engaged with a moving ring outer spur gear II. Under control of the controldevice, The automatic stretcher can automatically conduct stretching pretightening, sleeve a moving ring into a nut, tighten the moving ring and the nut and conduct screw-in and screw-out of the stretching head, and is high in pretightening speed and efficiency, good in pretightening uniformity, high in reliability and capable of being applied to a manipulator to achieve intelligent pretightening.

Description

technical field [0001] The invention relates to a stretcher, especially an automatic stretcher. Background technique [0002] At present, the tensioners used in the field of mechanical pretensioning are generally manual tensioners, and the entire stretching and pretensioning process is completed by manual operation. Slow preload speed and low efficiency; preload consistency and poor reliability. Contents of the invention [0003] Aiming at the shortcomings of the current manual stretcher, the invention provides an automatic stretcher. It is composed of a stretcher body, a driving device 1, a driving device 2, a control device and a bracket. It is characterized in that: the stretcher body is composed of oil cylinder head, oil cylinder one, oil cylinder two and support ring in sequence, and an oil inlet joint with a self-control valve is arranged outside the connection between oil cylinder one and oil cylinder two. Described oil cylinder one is connected by upper oil cyli...

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