SU439385A1 - Impact Wrench - Google Patents

Description

one

The invention relates to rotary hand-operated power tools for assembling threaded connections.

A wrench with a shock-pulse mechanism is known, containing a head with an anvil and with an allen key, a drummer made in conjunction with a flywheel, interacting with the anvil.

However, the known wrench has a lot of weight and a complex structure.

The purpose of the invention is to simplify the wrench.

To do this, in the proposed wrench, the flywheel is hollow, covering the head with the anvil, and the firing pin is also located in this cavity and is equipped with a retractile spring on the head.

FIG. 1 shows the proposed wrench, general view; in fig. 2 - diagram of the shock-pulse mechanism.

A pulse-impact wrench consists of a head 1, an anvil 2 that rotates the head, an Allen key 3, which interacts with the unscrewed nut faces, and a flywheel 4, in the cavity of which there is a hammer 5, which interacts with the anvil, and a coil return spring 6 that provides a return heads in the initial position, "dog 7, mounted on the housing 8, providing rotation of the head in one direction, the bracket 9, made in the form of a hollow pipe, which has a valve 10, and inside The valve chamber 11, the valve 12, the channel a has an opening 13 for the compressed air to flow out of the strips A, B, C, the openings 14 and 15 for the release of compressed air into the cavity B and C; the frames 16 and the wheels 17 serving to move the wrench; screw stop 18 and handles 19.

The wrench works as follows. To loosen, for example, the spindle nut, the node wagon drives the wrench to the work site. Rotating knob 19

tighten the head and put it on the nut. Pressing the valve 10, reports the cavity of the arm 9, where the compressed air is supplied, with the chamber 11.

Under the action of compressed air valve

12, but not the spring-applied force of elasticity of the spring, communicates the cavity of the bracket 9 through the channel a with the cavity B, from where air enters through the holes 14 and 15 into the working cavities A and B between the hammer 5 and the anvil 2.

Compressed air drives the flywheel 4, which in half a turn acquires a significant inertia force and strikes the hammer along the anvil, turning the head through a certain angle.

After closing valve 10, the chamber AND

the valve 12 communicates with the atmosphere, and the valve 12 under the action of the force of the spring returns to its original position, closing the channel a and together the cavity B through the opening 13 and the cavity L and B with the atmosphere.

Spring 6 returns the flywheel to its original position. If the button is pressed again, the flywheel comes into rotation again and reports the pulse-impulsive torque to the head. Thus, the flywheel, interacting with the head through the hammer and the anvil, serves as a drive mechanism, which simplifies the entire mechanism of the geovert.

The subject of invention

Claims (2)

1. A pulse / impact wrench with a head with an anvil and a socket wrench, a drummer made in conjunction with a flywheel, interacting with an anvil, characterized in that, to simplify the wrench, the flywheel is hollow, covering the head with an anvil, the drummer is also located in this cavity. 2. A wrench according to claim 1, characterized in that a helical return spring is worn on the head.