Pneumatic tightening device for bolt

Abstract

The invention discloses a pneumatic tightening device for a bolt. The pneumatic tightening device comprises a tightening body, wherein the tightening body comprises a tightening housing, a stator and a rotor; one end of the tightening body is connected with a handle; the other end of the tightening body is connected with a tightening component; an end port of the handle is connected with a pneumatic connecting head; the tightening component comprises a sleeve connected with the stator; a groove sleeving connection port in a hexagonal structure is formed in the end port of the sleeve; a rotary tightening piece detachably connected with the rotor is arranged in the sleeve in a sleeving manner; and the length of the rotary tightening piece can be changed in a telescopic manner. According to the pneumatic tightening device, the sleeve connected with the stator is adopted, so that no sleeve rotates with the rotation of the rotor; the telescopic rotary tightening piece connected with the rotor is adopted, so that the pneumatic tightening device is applicable to the tightening of a common bolt, as well as a special bolt structure with a thread end. The pneumatic tightening device is wide in application range, high in working efficiency and good in practicability, and deserves extensive promotion.

Description

technical field [0001] The invention relates to a bolt, in particular to a pneumatic tightening device for the bolt. Background technique [0002] Bolts are widely used mechanical parts, including bolt heads and threaded rods, which need to be matched with nuts to fasten and connect two parts with through holes. This connection form is called bolt connection. If the nut is unscrewed from the bolt, the two parts can be separated, so the bolt connection is a detachable connection. Bolt heads include hexagonal head, round head, square head, countersunk head, etc., among which hexagonal head is the most commonly used. Generally, the countersunk head is used where the surface is required to be smooth without protrusions after connection, because the countersunk head can be screwed into the part; the round head can also be screwed into the part, and the tightening force of the square head can be larger, but the size is large. [0003] Pneumatic tightening devices for traditiona...

AI Technical Summary

Problems solved by technology

If the connected parts are large in area and thick in thickness, the length of the threaded rod is too long, and one person cannot operate it, requiring two people to work at the same time, which is time-consuming, labor-intensive and labor-intensive, especially in factories that require bolts to assemble parts in mass production, not only Low production efficiency and high human resource costs

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