SU1546242A1 - Percussive power nut setter - Google Patents

Abstract

This invention relates to a mechanized pulse impact tool. The purpose of the invention is to increase the efficiency and reduce the level of vibration and noise by increasing the impact energy transmitted to the tightened threaded joint. When the drive 2 is turned on, the output shaft 3 rotates through the screw groove 4, the ball 18, the profile groove 11 is transmitted to the sleeve 9. The sleeve 9 through the working cams 15 carries the sleeve 13 and the anvil spindle 5, which tightens the threaded connection. As the threaded joint is tightened, the resistance in the thread increases and the anvil spindle 5 stops, however, the output shaft 3 continues to rotate, and the ball 18 rolls in the helical groove 4 of the output shaft 3 and the profile groove 11 of the sleeve 9. The latter moves in the axial direction and outputs working cams 15 out of engagement with working cams 7 of spindle anvil 5. Sleeve 9 moves axially due to inertia forces until its speed equals the speed of the output shaft 3 and then under the action of n dining 8 returns to the initial position, the operating cam 15 is applied on the working punch 7. Under the action of the cams reactive moment the hammer rebounds from -nakovalni spindle 5, the sleeve 9 rolls ball 18 in the screw

Description

The invention relates to a mechanized pulse impact tool and can be used in various industries in tightening and disassembling threaded connections.

The purpose of the invention is to increase the efficiency and reduce the level of vibration and noise by increasing the impact energy transmitted to the tapped threaded joint.

9 and the yoke 13 and are engaged with the working cams 7 of the spindle - anvil 5, the latter and the yoke 13 begin to rotate together with the sleeve 9, and the anvil spindle 5 transmits the rotation to the nut of the tightened threaded connection.

As the nut is tightened, the resistance to rotation of the latter in the threaded joint increases, and the spindle anvil 5

FIG. Figure 1 shows the impact nut 10; along with the helicopters, a longitudinal section; in fig. 2 - different in engagement by working cams 15

and connected with the latter yoke 13 and the sleeve 9. However, the output shaft 3 continues to rotate, while the ball 18 starts to simultaneously roll in the helical groove 4 and the profile groove 11, with the result that the sleeve 9 together with the working cams 15 begins to accelerate axially from the anvil spindle 5 and the working key of the key is removed at one end and with the working 20 of the latch 15 from engagement with the working cam-cams 7 at the other end, installed by the spindle 7 of the anvil 5. Sleeve 9

together with the yoke 13 and the working cams 15 begins to rotate relative to the stationary spindle — the forging output shaft 3 sleeve 9 from the flange 5 5 due to the inertia of the workers 10, having on the inner cylinder 15 together with the sleeve 9 lastly moves in the axial direction , compressing the spring 8 until such time as its angular velocity is comparable with the angular velocity of the output shaft 3. In

cut A-A in FIG. one; in fig. 3 shows a section BB in FIG. one; in fig. 4 shows a section B-B in FIG. one; in fig. 5 - the motion path of the firing pin cams.

The impact wrench includes a housing 1, a drive 2 therein, with an output shaft 3 having at least one helical groove 4 on the outside surface, an anvil spindle 5 with a head 6

a hammer on the output shaft 3, spring-loaded in the direction of the spindle — the anvil 5 by the spring 8. The drummer includes a circumferential surface, a profile groove 1 opposite to the helical groove 4 of the output shaft 3, and two diametrically located at the end of the collar 10

through holes 12 spanning 30 this moment the ball 18 stops at

the screw groove 4 of the output shaft 3 and the profile groove 11 of the sleeve 9, at the same time the axial movement of the sleeve 9 with the working cams 15 stops. Then under the action of the spring 8 the sleeve 9

The working cams 15 each. Each of the 35 working cams 15 is returned to the swaying cams 15 is spring-loaded relative to its original position, with the ball 18,

rolling over the helical groove 4, the sleeve 9, the yoke 13 with two diametrically located through holes 14 and placed in the through holes 14 and 12 of the yoke 13 and the sleeves 9, respectively, with the possibility of axial shifting

the drive shaft 3 and the profile groove 11 of the sleeve, informs the latter, and with it the working cams 15 and the holder 13, additional acceleration. As a result, the potential energy accumulated by the compressed spring 8 is converted into additional kinetic energy received by the impactor due to the transfer of the shoulder 10 of the sleeve 9 by the spring 16, and its axial movement relative to the shoulder 10 is limited by the retaining ring 17. In the helical groove 4 of the output shaft 3 and the profile groove 11 of the sleeve 9 is placed the ball 18.

Impact wrench works as follows.

In the initial position, under the action of the spring 8, the sleeve 9, together with the working shaft 3, rotates from the output shaft 3 by the cams 15, is pressed to the side of the spindle through the helical groove 4, the ball 18 and the anvil section 5 so that the ball 18 is sized fillet groove 1 1 of the sleeve 9. The workers cam in the upper and lower parts of the profile 5 engage with the working grooves 11 of the sleeve 9 and the helical grooves 7 of the anvil spindle 5 and the output 4 nanotubes shaft 3, respectively, with t on the last blow, in which the accumulation of the working cams 15 are in engagement rnikom lenii kinetic energy transferred to the working spindle cams 7 - is given for tightening a threaded joint, where converted to a tightening operation. In the process of tightening the threaded joint, the resistance in the thread increases, resulting in an increase in the reactive moment (rebound) of the striker after the workers claws 15 hit the working jaws 7 of the anvil spindle 5. At the same time, the striker rolls the ball 18 into the screw conduit 5.

After installing the key (not shown) on the nut of the clamped threaded joint (not shown), turn on the drive 2, which transfers the rotation to the output shaft 3. The output shaft 3 through the screw groove 4, the ball 18 and the profile groove 11 transfers the rotation to the sleeve 9, but as the cams 15 are located simultaneously in the sleeve

If 4 each time goes farther and farther 9 and the yoke 13 and is engaged with the working cams 7 of the spindle - anvil 5, the latter and the yoke 13 begin to rotate together with the sleeve 9, and the spindle anvil 5 transmits the rotation to the nut being tightened threaded connection.

As the nut is tightened, the resistance to rotation of the latter in the threaded joint increases, and the spindle anvil 5

0

the drive shaft 3 and the profile groove 11 of the sleeve, informs the latter, and with it the working cams 15 and the holder 13, additional acceleration. As a result, the potential energy accumulated by the compressed spring 8 is converted into additional kinetic energy received by the impactor due to the transfer of rotation from the output shaft 3 through the helical groove 4, the ball 18 and the profile slot 1 1 of the sleeve 9. Workers - ki 5 enter into engagement with the working knobs 7 of the spindle anvil 5 and the nano with the last blow, at which the kinetic energy accumulated by the impactor is transferred to the tightened threaded joint, where it is converted into work . In the process of tightening the threaded connection, the resistance in the thread increases, resulting in an increase in the reactive 5 moment (rebound) of the striker after the workers' cams 15 strike the working cams 7 of the anvil spindle 5. At the same time the striker rolls the ball 18 into the helical dimple 4 every time farther and farther j

set to another threaded connection.

During the operation of the impact wrench, the contacts of the ends of the 19 working cams 45 with the end of the 20 working cams 7 and the spin-return of the cams 15 of the striker of the 5 anvil 5 cases (Fig. 5e) are possible. In this case, every 0.5 revolutions of the output, axial movement of the working g-cam 15 relative to the sleeve 13 and sleeve 9 occurs, while the springs 16 are compressed. After the end surfaces 19 and 20 of the surfaces 16 and 20 have come off contact, the working cams 15 move in the initial position, which ensures the engagement of the afterbirth, when the striker is displaced by more than 180 ° from the initial position with respect to the output shaft 3, the wrench switches to operation 1 mode after one turn of the output shaft 3 (Fig. 56). The length of the ball used 18 parts screw

above, increasing the compression of the spring 8 and, accordingly, the impact energy of the impactor.

When moving the impactor as a result of the rebound less than 180 ° with respect to the output shaft 3. (Fig. 5a)

shaft 3. The length of the helical groove 4 used by the rolling ball 18 is always less than the ratio

sina

them with working cams 7 anvils 5.

spindle 15

Claims (1)

Claims of the invention: Impact wrench, comprising a casing accommodated therein with an output shaft, having at least one helical groove on the outer surface, 2Q anvil spindle with a turnkey GOLORYA at one end and working cams at the other, mounted on the output shaft and spring-loaded in the direction of the spindle - anvil drummer with working cams, The shaft of the counter spindle cam is the anvil shaft, the length of the helical groove part 4, in which 25 having a ball 18 on the inner cylindrical one rolls over, the profile groove in this surface mode and the ball for interaction with the latter and the helical groove, characterized in that, in order to increase efficiency and reduce the level. With a further increase in the moment n of vibration and noise, the length of the helical channel, - - - ,,,. grooves 4 when operating the wrench in the specified mode is always less than the ratio IgLo + d. sina Further, for the same reasons, the wrench goes into work mode 1 stroke after 1.5 turns of the output shaft 3 (Fig. 5c). 2 35 is always less than the ratio -I - D- -d. si pa tightening the threaded connection, the wrench goes into work mode 1 stroke after two turns of the drive shaft 3 (.fig. 5d). This will occur until the ball 18, rolling along the helical groove 4, uses its entire working length. The wrench tightened the threaded connection up to the maximum tightening torque. After switching off the drive 2 impact wrench Aa . where D is the diameter of the output shaft; d is the diameter of the ball; a is the angle of inclination of the screw groove sweep to the generator of the cylindrical surface of the output shaft. 5-5 9, while the springs 16 are compressed. After the end surfaces 19 and 20 of the spring 16 come off, the springs 16 move the working cams 15 to the initial position, allowing the latter to engage with the working cams 7 of the anvil 5. spindle / - "-k. where D is the diameter of the output shaft; d is the diameter of the ball; a is the angle of inclination of the screw groove sweep to the generator of the cylindrical surface of the output shaft. 5-5 FIG. 2 in-in 18 FIG. four FIG. five