SU755544A1 - Dynamometric wrench - Google Patents

Description

The invention relates to the field of general engineering and can be used for high-quality tightening of threaded connections. ;

Known torque wrench, comprising a housing with a working head, fixed in it by one end of a fixed and deformable elements, on a fixed element there is a 10 spring-loaded drummer and a setting mechanism in the bar scale and slider with a risk mark [D].

The disadvantage of this key is that the scale of the scale is relatively small with a large division price, which leads to significant errors when combining the risks of a ruler and a slider. In addition, the location of the drummer outside the key handle deprives the operator, 20 of them using it, the ability to accurately determine the moment of operation of the mechanism, as well as its listening comprehension, especially in conditions of production noise. 25

The closest technical solution to the invention is a torque wrench, comprising a housing with a working head, fixed in it with one end fixed and deformed-30

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beams and a tuning mechanism with drummers for sounding torque [2].

The disadvantage of such a key is that the tuning mechanism and the drummer of the acoustic signaling of the tightening torque of the threaded connection do not allow for the required precision of tightening the threaded connection during key operation, because, first, the reference scale of the tightening torque is located that do not coincide with the deflection boom ί under the influence of the eatyaze force; secondly, the scale is made in the form of a dashed line with risks, with which the risk of the slider is combined, the accuracy of the installation depends on the width of the strokes.

The aim of the invention is to improve the accuracy of the torque key.

The goal is achieved by the fact that, in the proposed key, the setting mechanism is implemented as a micrometer head mounted on one of the beams in the direction of the deflection of the deformed beam, which has a screw which is spring-loaded along the axis and interacts with the impactor.

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755544

sound alarm, and connected with him adjustable probe, periodically interacting with one of the beams.

In addition, the key is provided with a damper located on the 'one of the beams, made in the form of a sleeve. And installed in it, spring-loaded along the axis of the core, through which the adjustable probe periodically interacts with one of the beams.

On .fig. 1 shows the described torque wrench, a partial section) in FIG. 2 - the same, top view; in fig. 3 shows a section A-A in FIG.

The torque wrench has a housing 1 with a working head, fixed in it a fixed beam in the form of a pipe 2 and a deformable beam in the form of a rod 3, which is bent under the action of an applied force to the handle 4 at its end. On the drive square 5, connected to the housing 1, an interchangeable head 6 is installed. On the fixed beam in the form of pipe 2, there is a damper in the form of a split sleeve 7 with ears 8 that have screw holes and a spring-loaded core 9 held by a nut 10, Screw

11 fixes the free or clamped position of the core 9 in the split sleeve 7. On the deformable beam 3 there is fixed a hollow handle 4 inside which there is a drummer 12 for sounding the tightening torque, a spring 13 and a screw 14 for preloading the spring 13. The handle 4 has an axial groove 15 for installation the leash 16 mounted on the impactor 12. In the radial through-hole of the handle 4, there is a fixedly mounted sleeve 17 having openings for the impactor 12, openings for the locking screw 18

and a through groove for an elastic plate 19, which is attached to the handle 4 by a screw 20. The force of the elastic plate 19 is adjusted by a screw 21. The end of the elastic plate rests on a tuning mechanism, made in the form of a micrometer head consisting of a probe 22, having a through transverse groove 23, through which goes through the drummer 12. At the end of the probe 22 there is a protrusion 24, and on its cylindrical part, an annular scale 25 of coarse adjustment. A micrometer screw 26 is screwed into the probe 22, which has a risk of 27. A flange 28 of the drummer’s end rests against the end of the micrometer screw 26

12 with an overlap equal to <5 ". A nut 29 is worn on the sleeve 17. It has a scale of 30 fine adjustments. A scale is shown on the fixed beam 2, showing the amount of tightening torque depending on the number η of turns of the screw 26.

The key works as follows.

Before attaching to the head of the bolt to be tightened, screws 11 and 18 are released and the leash is exposed to 16

drummer 12 is retracted to the position shown in FIG. 1, in which the spring 13 is compressed and under its influence "as well as under the influence of the spring 19, the drummer 12 and the screw 26 come into contact over the diameter surface. This position corresponds to the output of the end of the screw 26 from the contact with the end face of the hammer 12 or the moment of its actuation for the audible signaling of the end of tightening. Screw 26 on scales 25 and 30, respectively, of coarse adjustment of the probe 22 and fine adjustment of the nut 29 sets the protrusion 24 of the probe corresponding to the position of contact of the end of the screw 26 with the surface 8 of the striker, while the lower end of the sleeve 17 is combined with the risks of the scale 25 on the probe 22 Then the key is attached to the head of the bolt (FIG. 2) by the interchangeable head 6, and a force is applied to its handle 4. Under the influence of the latter, the beam 3 bends, and the protrusion 24 of the probe 22 comes into contact with the end face of the core 9 and stops. Upon further movement of the beam 3, the probe together with the screw 26, overcoming the resistance of the spring 19, is retracted upward (Fig. 1) and, passing section 6, releases the drummer 12, since the end of the screw 26 comes out of contact with its end face.

Under the influence of the spring 13, the striker moves to the right (Fig. 1) and its lead collides with the body of the handle 4, signaling the completion of the tightening of the threaded connection with the set torque.

The use of the proposed torque wrench for tightening threaded connections provides the necessary accuracy.

The accuracy of tightening the key new design increases several times compared with the known keys of the same design.

Claims (2)

Claim 1. A torque wrench, comprising a housing with a working head, fixed in it by one end of a fixed and deformable beam, and a tuning mechanism with a drummer for sounding a tightening torque, which in order to increase the precision of the tightening torque, the tuning mechanism is installed on one of the beams in the direction of the deflection of a deformable beam of the micrometer head, having a screw spring-loaded along the axis, which interacts with the sound alarm drummer, and an adjustable probe connected to it, cally interacts with one of the beams. 2. The key according to claim 1, which differs from I in that it is equipped with 755544 6 a damper placed on one of the beams, made in the form of a sleeve and installed in it a spring-loaded core, · through which the-adjustable probe periodically interacts with one beam. BUT