A fast cylinder-loading jig for a jack

Abstract

The invention provides a rapid cylinder assembling fixture for a jack. The middle of a fixture body is provided with a step-shaped cylindrical hole. The step-shaped cylindrical hole comprises a large step part and a small step part which is located on the upper portion of the large step part. A movable limiting assembly used for clamping / loosening the outer wall of an oil cylinder barrel is arranged on the large step part and comprises a lining and rolling bodies installed on the lining. The large step part is provided with two or more eccentric circular arc parts which work with the rolling bodies in a matched mode. A lining cover plate making contact with the lining is installed at the lower end of the fixture body. A mandrel inserted in an inner cavity of the oil cylinder barrel is installed in the fixture body. According to the provided assembling and disassembling fixture used for a vertical oil jack oil cylinder, the structure is simple, and using is convenient; the oil cylinder can be rapidly assembled in a base at high quality and can further be rapidly disassembled from the base; and in addition, after assembling and disassembling are conducted, an inner hole and an end thread of the oil cylinder are free of deformation, and the oil cylinder can be used again.

Description

technical field [0001] The invention relates to a clamp for fast loading and unloading of a vertical oil hydraulic jack cylinder, which is mainly used for fast installation, connection or separation between the hydraulic jack cylinder and a base. Background technique [0002] Jack assembly assembly is a batch product production operation, which pays special attention to operation efficiency. When loading and unloading oil cylinders with external threads at both ends, the installation of the thread at the other end and the assembly fittings has always been achieved by connecting the thread at one end. This process has two disadvantages: 1. The thread connection has low tightening effect , which cannot satisfy the production of modern enterprises; 2. After the assembly of the oil cylinder and the base is completed (the upper cylinder machine table will rotate around the rotation axis at a certain angle during operation, and when a certain torque is reached, the upper cylinder ...

AI Technical Summary

Problems solved by technology

When loading and unloading oil cylinders with external threads at both ends, the installation of the thread at the other end and the assembly fittings has always been achieved by connecting the thread at one end. This process has two disadvantages: 1. The thread connection has low tightening effect , which cannot satisfy the production of modern enterprises; 2. After the assembly of the oil cylinder and the base is completed (the upper cylinder machine table will rotate around the rotation axis at a certain angle during operation, and when a certain torque is reached, the upper cylinder machine will automatically stop), with The rotating shaft drives the worktable (including the base) to rotate elastically, and the threaded clamp body connected with the upper cylinder machine spindle is loosened. When the upper cylinder machine spindle rotates in the opposite direction, the clamp body is disengaged from the oil cylinder, and the process assembly is completed.

When assembled in this way, especially after reaching a certain torque, the automatic stop will cause elastic rotation, which will cause looseness between the oil cylinder and the base in about 8% of the assembly, and with the reversal of the upper cylinder machine, the clamp body will carry The oil cylinder is reversed together to disengage the base, causing assembly failure

[0003] In addition, in actual production, the oil circuit of the base may pass through due to casting defects, resulting in failure of the assembly. It is necessary to remove and replace the oil cylinder installed on the base. At this time, only vise and large pipe wrench can be used. Manual work, this method is not only low in efficiency and high in strength, but also causes the cylinder to deform and fail, making it impossible to use it again

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