SU1293007A1 - Percussion-action nut driver - Google Patents

Abstract

The invention relates to a mechanized shock impact tool. The purpose of the invention is the expansion of technological capabilities, which is achieved due to the fact that pin-anvil-. With working cams and a retainer, it is an interchangeable self-contained part of the wrench. The drummer 3 is made with radial grooves 4 in which sliders 5 are hingedly connected by levers 6 to the rod 7. The rod 7 is spring-loaded in the axial direction by the spring 8 and has a protrusion 9 at one end, and the other end is connected with the mechanism for controlling the impact velocity . The glass 10 is placed B of the housing 1 rotatably and has windows 11, a longitudinal groove 12, holes 13 coaxial with it, a cylindrical protrusion 14 with an annular groove 15. Windows 11 have a profile that responds to the profile of the anvil spindle cams. In the groove 12 and the holes 13 are placed the rollers 23, interacting with the protrusion 9 of the rod.7. 4 il. c & (L ND CO with

Description

The invention relates to a mechanized pulse impact tool and can be used in the assembly and disassembly of threaded connections in various sectors of the industry.

The purpose of the invention is the expansion of technological capabilities.

The goal is achieved due to the fact that the spindle-anvil is executed as an independent assembly unit and is joined to the housing after it has been installed on the head of a bolt or nut of the tightened threaded connection.

FIG. 1 shows a impact wrench (partial leveling); in fig. 2 is a view A of FIG. one; in fig. 3 - spindle-anvil; FIG. 4 is a view B in FIG. 3

The impact wrench for coarse threaded connections includes a housing 1, an actuator 2 mounted thereon (not shown), a drummer 3. In the drummer 3, in the radial grooves 4 there are slides 5 pivotally connected through the levers 6 to the rod 7.

The rod 7 is spring-loaded in the axial direction by the spring 8 and has a protrusion 9 at one end and is kinematically connected to the other end with a mechanism for controlling the impact velocity (not shown).

A cup 10 is pivotally mounted in the housing 1, which has a bottom slot 11 in the bottom of the cup 10 and a longitudinal groove 12 oriented relative to the windows 11 and coaxial with radial holes 13 extending thereto 13. At the bottom of the cup 10 there is a coaxial cylindrical protrusion 14 with an annular groove 15. The spindle-anvil 16 is an independent assembly unit and on one side has working cams 17 and a central hole 18, a counter projection 14 of the cup 10, a head 19c on the other side and a radial hole 20. In the radial ERSTU retainer 20 is placed 2-1, spring-loaded to the spindle 16 by a spring 22 -nakovalni axis.

In the groove 12 and the radial holes I3 there is a mechanism for controlling the engagement geometry, consisting of rollers 23, spring-loaded to the axis of the cup 10, springs 24, and interacting with projections 9 of the rod 7. Windows

fO

15

0

five

0

five

0

five

0

5 and crawlers

11 have a profile that responds to the profile of the working cams17.

Impact wrench works as follows.

At the beginning, a spindle-anvil 16 is mounted on a coarse threaded joint so that the nut or head of a bolt of the fastenable thread enters the head 19. Then, the body 1 with the percussion mechanism in it is installed on the anvil spindle 16. In this case, the working cams 17 of the spindle anvil 16 enters the windows 11 of the cup 10, and its protrusion 14 enters the central hole 18 of the spindle-anvil 16, and the end of the retainer enters the annular groove 24 and guards the spindle anvil 16. Then the drive turns on 2, and the hammer 3 begins to rotate with acceleration to one side or the other.

When the specified angular velocity of rotation of the striker 3 is reached, the mechanism for controlling the velocity of impact triggers, and its kinematic connection with the rod 7 is broken, freeing the end of the latter. Under the action of centrifugal forces, the slide blocks 5 begin to move to the periphery of the hammer 3, and the rod 7 with the projections 9 to the side of the rollers 23. However, the output of the slide blocks 5 will only be possible in a strictly defined position of the hammer 3 and the anvil spindle 16 when the sliders 5 turn opposite to the workers cams 17, while the protrusions 9 of the rod 7 are located perpendicular to the axis of the groove 12, and the end of the rod 7 freely enters the gap between the rollers 23. With further rotation of the striker 3, the sliders 5 completely exit from the grooves 4 and strike the working cams 17 with a spindle - akovalni 16, passing the accumulated kinetic energy, causing anvil spindle 16 is rotated by some angle, and performs the tightening of the threaded joint.

After the accumulated energy has been transferred, the hammer 3 stops, the centrifugal forces stop, the spring-loaded rod 7, and with it

5 returns to its original position. At the same time, the end of the rod 7 is again kinematically coupled with a mechanism for controlling the velocity of a collision (not shown).

Then the hammer 3 begins to rotate again with acceleration, and the whole cycle repeats in the sequence described.

After tightening the threaded joint, the actuator 2 stops, the latch 21 is moved in the axial direction until such time as its end leaves the annular groove 15 of the protrusion 14, and the housing 1 is removed from the anvil spindle 16.

Thereafter, the anvil spindle 16 is removed from the nut or bolt head of the tightened threaded joint (not shown) and transferred to the next threaded joint to be tightened. Thereafter, the body 1 is reinstalled on the pushpin 16, and the entire pulling cycle is repeated.

Claims (1)

Invention Formula Impact wrench for large threaded connections, comprising a housing, an actuator housed in the housing and coupled to the output shaft of the actuator o five 0 five a drummer with sliders installed in it with the possibility of radial movement and an impact speed control mechanism kinematically associated with sliders, an engagement geometry control mechanism and anvil spindle with working cams, characterized in that , it is equipped with a glass mounted in the housing with the possibility of rotation, having through windows at the bottom, spindle-mats responding to the cams, a longitudinal groove and the radial holes extending into it, and coaxial the outer cylindrical protrusion with an annular groove at the end, and a latch springed to the axis of the spindle anvil and interacting with the lateral sides of the annular groove, is narrow and anvil made with a central hole, a reciprocal protrusion of the glass, and a radial hole in which the latch is located, and the mechanism for controlling the geometry of the engagement is placed in the groove and the radial holes of the glass. In id ig. 2 78 sixteen /five . J Budff 17 Editor A. Gulko Compiled by 10. Sergeev Tehred V. Kadar Order 327/17 Circulation 954 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 fpu. Proofreader S. Cherni