SU1685698A1 - Power nut-setter - Google Patents

Abstract

This invention relates to a handheld mechanized tool. The purpose of the invention is to expand technological capabilities and increase reliability by changing the range of sizes of tightenable threaded connections. When the motor 2 is turned on with the left direction of rotation, the output shaft 3 through the eccentric 11, the drive 24 and the driven 22 half coupling, torque limiting couplings, the driven bevel gear 15 is transmitted to the central gear train. industry when calibrated tightening of threaded connections. The purpose of the invention is the expansion of technological capabilities and increased reliability by expanding the range of sizes of tightenable threaded connections. Next, the rotation through the satellites 9 is transmitted to the central gear wheel 6 with internal teeth and the spindle 4. At the same time, the driven shaft 17 transmits the rotation of the sprocket 19 counterclockwise, as a result, the freewheel is disengaged. With increasing resistance in the thread, the leading half coupling 24 begins to slip relative to the driven half coupling 22, while the leading bevel gear wheel 14 begins to run around the driven bevel gear wheel 15 and, through the hinge 18, transfers the rotation to the driven shaft 17 with an asterisk 19. Bevel gears 14 and 15, the driven shaft 17 rotates clockwise and through the sprocket 19, the rolling body 21 and the ferrule 20 transfers the rotation to the spindle 4. At the same time, under the action of the reactive moment, springs 10 are bent, the carrier 8 is rotated with the lever, which cooperates with a limit switch 28. 1 ZP f-ly, 5 ill. Figure 1 shows a General view of the wrench, a longitudinal section: figure 2 - section aa in figure 1; Fig 3 - section BB in Fig 1; figure 4 is a section bb In figure 1; Fig. 5 shows the same, when the maximum tightening torque of the threaded connection is reached. o 00 ate o che; oo

Description

including a central gear wheel 6 with internal teeth, mounted on the free end of spindle 4, a central gear wheel 7 with external teeth, drove 8 with satellites 9 placed in it, spring-loaded relative to the housing 1 in the tangential direction by flat springs 10, additional precession the gearbox, including an eccentric 11c mounted on the output shaft 3, eccentric eccentric and inclined to its axis 12, placed in the last drive shaft 13, mounted on it a leading bevel gear 14, to my bevel gear 15 having a central through hole

16 and rigidly connected with a central gear wheel with external teeth, having the same central through hole, placed in the central through hole 16, driven shaft 17 Hooke's hinge 18 connecting the driven van

17 with the drive shaft 13.

The driven shaft 17 is kinematically connected to the spindle 4 through a freewheel including a sprocket 19 fixed on the free end of the driven shaft 17, a holder 20 fixed in the central gear wheel 6 with internal teeth. and rolling bodies 21 placed between them. The eccentric 11 is kinematically connected with the driven bevel gear 15 by means of a torque limiting clutch including the driven half coupling 22 with face teeth 23 mounted on the driven bevel gear 15 leading to the coupling half 24, mounted in the form of a stepped sleeve mounted on an eccentric 11c with the possibility of joint rotation and relative axial displacement, having end teeth 25, counter teeth end m and 23, and spring-loaded towards the driven coupling half 29 by spring 26.

A disk 27 is placed in the housing 1 with the possibility of fixed rotation, on which a limit switch 28 is fixed, electrically connected with the electric motor 2. On the outer surface of the carrier 8, a lever is fixed perpendicular to its axis

29, designed to interact with a limit switch 28. The position of the disk 27 is fixed by an adjusting screw

30. On a cylindrical disk surface

27 there is a risk (not shown in the drawing), and in case 1, opposite to the risks, a window is made, next to which there are divisions. each of which corresponds to a certain tightening torque (not shown in the drawing).

The wrench works as follows

Before starting work, adjust the wrench to the required tightening torque. For this, the disk 27 is turned relative to the housing 1 so that its risk lies opposite the corresponding division applied on the housing 1, and then the disk 27 is fixed by the adjusting screw 30. When the disk 27 is rotated, the limit switch 28 rotates with the lever 29, which is kinematically with flat springs 10, and when bent, the latter moves towards the end switch 28.

When the electric motor 2 is turned on, with the left direction of rotation, the eccentric 11 begins to rotate along with its output shaft 3, the drive shaft 13 and the drive coupling half 23 of the torque limit clutch are placed in it. Together with the driving half-tail 24, the output of the half-coupling 22 with the driven bevel gear 15 and the central gear wheel 7 with the outer teeth start to rotate. Further, the rotation through the satellites 9. the retarded carrier 8 is transmitted to the central gear wheel 6 with internal teeth and to the spindle 4, which carries out accelerated screwing of the nut (not shown). At this time, the eccentric 11, the drive shaft 13, the drive 14 and the follower 15 bevel gears rotate as one integral link and via the driven shaft 17 transmit the rotation of the sprocket 18 of the one-way clutch counterclockwise (as seen from the side of the electric motor 2), which allows Spindle 4 freely rotates with freewheel holder 20, Simultaneously, under the action of the reactive moment, the flat springs 10 are bent, connecting the carrier 8 with the body 1.

As the threaded joint is tightened, the resistance in the thread increases and, when a certain tightening torque is reached, the tooth 25 of the driving half coupling 24 overcomes the force of the spring 26 and begins to slip relative to the teeth 23 of the driven coupling half 22. The driving conical axle gear 14 begins to run around but the driven bevel gear 15 counterclock-wise. However, due to the difference in the number of teeth of the drive 14 and the driven 15 bevel gears, the driven shaft 17 together with the sprocket 19 receives rotation through Hooke’s hinge 18 in a clockwise direction.

As a result, the driven wap 17, through the sprocket 19, the rolling body 21 and the ferrule 20, transmits directly to the spindle 4, which performs a zig of the threaded connection with a low angular velocity, but with a large torque. The reactive moment at this time is also extinguished through the carrier 8 and the flat springs 10 onto the housing 1. When the limiting torque of the threaded connection is reached, the bend of the flat springs 10, which characterize the angular rotation of the carrier 8 with the lever 29, reaches such a value that the lever 29 interacts with end key switch 28, which breaks the electric circuit of the electric motor 2, and the latter stops. The wrench is then re-placed to the next threaded connection to be tightened, and the BPSB is repeated in the sequence indicated.

Claims (2)

Claim 1. A nut wrench, comprising a casing, a VMUOD shaft electric motor, a spindle with a wrench head at one end, a planetary gearbox, including a central gear with internal teeth, fixed and ;. the free end of the spindle, the freewheel, including the A star ku clip, the torque limit clutch including the drive and the driven half couplings, which are spring-loaded to each other, and the end switch electrically connected with the electric motor and the lever that differs from in order to expand technological capabilities and increase reliability by expanding the range and dimensioning of threaded threaded connections, it is equipped with an additional precession reducer. An eccentric eccentric mounted on the output shaft with an eccentric and inclined to its axis hole, placed in the latter with the possibility of rotation of the drive shaft, mounted on it a leading bevel gear, rigidly connected to the central wheel with external teeth driven bevel gear with the central hole, driven in the last driven shaft and Hook connecting the ends of the drive and driven shafts, the centering eubcha- GOR "wheel with external teeth was made with the central hole, drove the substructure it is tangential in relation to the housing; the freewheel cage is fixed in the central gearwheel with internal teeth; the free-wheel clutch sprocket is fixed at the end of the driven shaft; the output torque coupling half coupling is fixed on the driven conical gear wheel of the torque coupling half coupling in the form of a sleeve that is stepped along the length, mounted on an eccentric with the possibility of joint rotation and relative axial movement, and the lever is fixed on the carrier. 2. A wrench pop 1, characterized in that it is provided with a disk mounted in the housing with the possibility of a fixed rotation, and the limit switch is fixed on the disk. , 2722 X M Ы11 /   TU 28 IS st, 5№ "J Fig1 / FIG. Z 28 19 Fig Fig.Z Y29 3028 Fig.Z