SU759303A1 - Lever-type impact wrench - Google Patents

Description

The invention relates to manual me-. perioled tools with a power drive of percussive action and can be used for repair work in various branches of the engineering industry, mainly for the assembly of large threaded connections.

The lever nut wrench is known, which contains an overhead wrench head, around the circumference of which a projection ’θ is placed to interact with the working tool of the percussion drive and the axis of the hinge attachment of the drive housing bracket to it].

The disadvantage of the known 1.5 gaykovefta is the low productivity due to the need to rearrange it in the process of impact tightening of the threaded connection after turning the wrench nut to a certain angle, 20 allowed by the surrounding space.

The closest to the invention technical solution of the known is the lever wrench containing-. The cushioned overhead wrench head with a high- ** blunt, encompassing its swiveling holder with a bracket, a percussion actuator placed on it with a working tool, 'interacting with a projection I. 30

2

The disadvantage of the known wrench is to increase the radial dimensions of the overhead nut head due to the protrusions located on it. This, in turn, leads to a decrease in the efficiency of the impact lever wrench due to the energy costs of the impactor drive to turn the additional masses of the Slip-on wrench head and the associated difficulties of working in hard-to-reach places.

The aim of the invention is the expansion of the technological capabilities of the wrench.

This goal is achieved by the fact that the wrench is equipped with a power cylinder with a spring-loaded piston-rod, designed to cover the head of the fastener and made with a cylindrical and multi-faceted sections on the outer surface, the yoke, is made with a through segment groove on the side surface, and the overhead nut head is made with a protrusion on the outer side surface interacting with the groove of the clip, and covers a multi-faceted portion of the power cylinder.

FIG. 1 shows a wrench, general view; in fig. 2 - section AA

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759302

four

FIG. 1} in FIG. 3 shows a section BB in FIG. 2; in fig. 4 shows a section B-B in FIG. The 3-lever nut wrench contains a ““ flat wrench 1 with a lug 2, an emphasis 3 and an internal multi-jaw box mounted in a rotary sleeve ^{5 and} 4 with the possibility of free rotation, a pneumatic punch 5 of percussive action, the working tool 6 ”of which interacts with the lug 2., "

The drive housing 5. is attached to the bracket 7, which is rigidly connected with a swiveling yoke 4. In addition, the wrench “contains a power cylinder 8, having a multi-faceted 9 and 10 cylindrical 10 sections on the outer surface and ending with a '15” wrench 11. The power cylinder 8 made with a cylindrical bore 12, in which a piston-rod 13 is placed. The piston-rod 13 is rigidly connected to the overlay nut “head 1.20 The single-acting power cylinder 8 is equipped with a spring 14 for returning the overhead nut head 1 to the working position. In the cylinder chamber 15, air from the air distributor '16 turns through "without channel 17 in the piston rod _: 13. Swivel holder 4 · is made with a window 18 for a protrusion 2 of an inclined nut head 1 and a groove 19, the surface 20 of which interacts with the stop _ _p

3 nut head when translating the wrench to a new starting position;

The wrench works as follows. -? - '·,' .............. .......

In the working position when the impact actuator 5 is turned on, the working tool 6, striking the protrusion 2, rotates the spanner 1 by a certain angle. The required orientation of the tool 6 axis and the working surface of the protrusion 2 is effected due to the constant pressing of the tool 6 to the protrusion 2 .The rotation of the head 1 in the direction of the tightening nut in the process of “impact tightening is carried out until the surrounding space allows. Then turning off the impact drive and at the same time turning on the air distributor 16 in the air The cylinder cylinder 15 is rotated, and the shock drive 5 and the overhead nut head 1, interacting through the stop 3, about the axis 8, of the cylinder to a new initial position, are rotated together. Pry''e'№M '' 'yJkyadnaya' ~ Sheyet 'head' with a piston - rod '13 moves “relative to 'power cylinder in axial 55

Ч Ч ГО ГО ГО ра ра в Л Л, вы вы вы вы 10 получает получает возможность свободного возможность После пов пов пов пов After turning the drive 5 into a new ¢ 0 original the position through the air distributor 16 communicates the chamber 15 with the atmosphere, and the nut head 1 under the action of the spring 14 moves relative to the axis of the power cylinder

again on the multi-faceted area 9. The wrench is again ready for the shock wadding. The window 18 and the groove 19 in the casing 4 are made to ensure free rotation of the nut head at a certain level at the moment of application of the impact pulse of the tool 6 to the protrusion 2, as in this case a part of the energy of a single blow will not be spent on the rotation of the drive.

Due to the fact that in the described wrench to implement a full tightening of the threaded connection without shifting the wrench on the nut, a single-lined overhead wrench head is used, it is possible to reduce the radial dimensions of the head.

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Thus, for example, a conventional wrench for screw connections with a diameter of 48 mm allows tightening in the case when the distance from the axis of the threaded connection to the body part exceeds 70 mm. In the described wrench, this distance can be reduced to 40 mm. This allows you to use this wrench to tighten threaded connections located in hard-to-reach places. In addition, it is possible to reduce the loss of energy transmitted from the drummer drive, by reducing the moment of inertia of the invoice wrench head. Reducing the loss of energy upon impact in the described wrench allows tightening threaded connections with a diameter of 56 mm with the same impact actuator.

Claims (1)

Claim A lever wrench containing an overhead wrench head with a protrusion, which encloses its swiveling yoke with a bracket, a percussion actuator placed on it — with a working tool interacting with the protrusion) characterized in that with the aim of expanding technological capabilities, it is equipped with a power cylinder designed for coverage; head fastener and made with a cylindrical and multi-faceted areas on the outer surface, the holder is made with a through segmental groove on the side surface, and laid-on wrench head is made with a protrusion / interacting with the groove. and covers the multi-faceted section of the power cylinder.