Puller

Abstract

The invention provides a puller. The stretching distance and the extension distance can be separately regulated, so that pulling feet and the surface of a pulled object are kept in a vertical state all the time, and pulling stability is ensured; and the extension distance can be increased as required, so that the puller is high in generality to parts of different depths, high in working efficiency and small in working amount. The puller comprises three pulling feet, a pulling seat and a screw rod, wherein the screw rod is arranged in the center of the pulling seat; and the three pulling feet are uniformly distributed on the pulling seat. The puller is characterized in that three bases are arranged at the bottom of the pulling seat; a threaded hole is formed in the center of the pulling seat; the three bases are uniformly distributed at the periphery of the threaded hole along the circumferential direction; a downwardly-convex positioning guide rail is arranged on the bottom surface of each base; the screw rod penetrates through the threaded hole; each pulling foot comprises an upper pulling claw, a middle vertical rod and a bottom positioning boss; and a fixing bolt is connected with paired connection sheets to form an upper vertical groove, longitudinal positioning grooves which are uniformly distributed, and a lower sliding groove.

Description

technical field [0001] The invention relates to the technical field of tools for pulling and separating objects, in particular to a puller. Background technique [0002] The extension range of the existing puller is determined by the diameter of the circle where the three pull feet are located, and the stretch is determined by the length of the pull feet and the screw. With the rotation of the screw, the distance between the pull feet and the surface of the pulled object The included angle will change, and it is easy to slip or the screw rod deviates from the center of the pulled object, or even damage the pulled object; and in order to ensure the stability of the puller, the extension of the puller with a certain extension range is also limited, that is, a puller The versatility for objects of different depths is poor, usually multiple pullers are needed to complete a type of work, the work efficiency is low and the workload is heavy. Contents of the invention [000...

AI Technical Summary

Problems solved by technology

[0002] The extension range of the existing puller is determined by the diameter of the circle where the three pull feet are located, and the stretch is determined by the length of the pull feet and the screw. With the rotation of the screw, the distance between the pull feet and the surface of the pulled object The included angle will change, and it is easy to slip or the screw rod deviates from the center of the pulled object, or even damage the pulled object; and in order to ensure the stability of the puller, the extension of the puller with a certain extension range is also limited, that is, a puller Poor versatility for objects of different depths, usually requires multiple pullers to complete a type of work, low work efficiency and heavy workload

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