RU1771943C - Vibratory nut runner - Google Patents

Abstract

The invention relates to a power tool. The purpose of the invention is to increase efficiency. When the drive 3 is turned on, the rotation of its output shaft 4 through the central gears 5 and b with the external and internal teeth, respectively, the satellites 8. are located / 2 / J between them, and the elastic-damping coupling 9 is transmitted to the drive shaft 10 with the central gear 11 with internal teeth. At the initial time, when the resistance in the tightened connection is insignificant, the sponge wheels 14 together with the unbalanced shafts 13 and the sleeve 12 with the spindle 1G rotate together with the gear 11. When the resistance in the tightened threaded connection increases, the sleeve 12 brakes, while the gears 11 with an unbalanced shaft 13 begin to rotate and transfer a symmetrical vibrational moment to the sleeve with the spindle 15. At the same time, an alternating moment is transmitted from the drive 3 to the sleeve 12. Under the influence of the sum of the moments, the threaded connection 1 sludge is tightened. s

Description

The invention relates to a power tool, in particular to devices for screwing threaded joints

Known vibration wrench containing a housing, a drive placed therein, a gearbox, a rotational vibration pathogen, an elastic damping sleeve and a spindle

"Closest to them" in technical essence to the invention is a vibration wrench, comprising a housing with a handle, a drive with an output shaft placed therein, connected to the last planetary gear, including central gears with external and internal teeth and a carrier with satellites, an elastic-damping coupling, connected through the latter to a chain gear with internal teeth, a drive shaft, a gear attached to the end of the last gear, a rotary vibration exciter including a sleeve, times the unbalanced shafts with gears placed therein for engaging with a gear mounted on the drive shaft, and a spindle mounted on the sleeve with a turnkey head at the end.

A disadvantage of the known wrench is its low efficiency

The purpose of the invention is to increase efficiency.

This is achieved by the fact that in a vibrating wrench containing a housing with a handle, a drive with an output shaft connected to the last planetary gearbox, including central gears with external and internal gears and a carrier with satellites, an elastic-damping coupling connected through the last with a central gear wheel with internal teeth, a drive shaft fixed to the end of the last gear wheel, a rotary vibration exciter including a sleeve, debagansky shafts located therein with gear teeth and wheels for engagement with a toothed wheel fixed to the drive shaft and fixed to the spindle sleeve head screws on the end gear fixed to the drive shaft, has internal teeth, and the carrier is fixed in the housing

The drawing shows a schematic diagram of a vibrating wrench.

The vibration wrench contains a housing 1 with a handle 2, a drive 3 placed in it with an output shaft 4, connected to the last planetary gearbox, including central gears 5 and 6

with external and internal teeth g / i, carrier 7 with satellites 8, an elastic damping clutch 9, connected through the central gear wheel 6 with internal teeth, a drive shaft 10, fixed to the end of the last gear wheel 11 with internal teeth, rotational vibration exciter, including sleeve 12, unbalanced placed in it

shafts 13 with gears. 14 for engaging with the gear 11 with internal teeth and a spindle 15 mounted on the sleeve 12 with a turnkey head 16 at the end. Drove 7 is fixed in building 1.

The wrench works as follows.

When the drive 3 is turned on, the central gear 5 with the external teeth starts to rotate.

the moment of time when the resistance when screwing the nut onto the threaded connection is small, the unbalanced rails 13 e of the gears 14 do not rotate due to the relatively high inertial resistance, and the sleeve 12 of the rotary exciter starts to rotate along with the gears 11 and 14. The nut is freely screwed on - on a threaded connection.

At the moment of contact of the nut with the end face of the piece being contracted, a sharp increase in the resistance to rotation of the sleeve 12 occurs, the rotation of the latter slows down, and the gears begin to rotate

14 with unbalanced shafts 13, and in the exciter of rotational vibrations, a symmetrical vibrational moment starts to be generated. As a result, the spindle 15 will be loaded with a vibrational symmetrical and

alternating moments.

The magnitude of the alternating moment Mn will be equal to the reduced value of the dynamic resistance Ms to the rotation of the unbalanced shafts 13.

Mp ms

Z14

In the proposed wrench, the maximum possible value of the alternating moment Mn due to the fact that the carrier 7 is rigidly fixed in the housing I, will be greater than the moment of the drive 3.

Since the maximum value of the constant moment Mn is equal to:

MP M L,

where MPR is the moment of drive 3:

ZQ, Zs - respectively, the number of teeth of the wheels 6 and 5.

Since Ze Zs. then the alternating moment Mp will be greater than the moment Mpr of drive 3.

With a correctly selected amplitude of the symmetric vibrational moment, the magnitude of the achieved tightening force of the threaded joint is practically proportional to the magnitude of the alternating moment M „.

Claims (1)

The claims A vibration wrench containing a housing with a handle, a drive with an output shaft placed in it, connected to the last planetary gearbox, including central gears with external and internal teeth and a carrier with satellites, an elastic-damping coupling, connected through the latter to a central gear wheel with internal teeth, a drive shaft mounted on at the end of the last gear, a rotational vibration pathogen comprising a sleeve, unbalanced shafts with gears housed therein for engaging with a gear fixed to a drive shaft, and a spindle mounted on a sleeve with a turnkey head at the end, characterized in that that, in order to increase efficiency, the gear mounted on the drive has internal tooth, and the carrier is fixed in the body.