SU1004091A2 - Electric vibration power nut driver - Google Patents

Description

The invention relates to hand-held portable tools with a power drive for connecting, disconnecting threaded joints, and can be used for mechanization of assembly and assembly work in various areas of projection.

According to the main author. St. No. 497125

 A vibrating electric wrench is known, comprising a housing with a handle, a drive including a rotor and

. The regulator, gearbox, rotary oscillation exciter, comprising a housing, a drive shaft, and two elastic couplings, one of which connects the actuator housing to the gearbox,

the other is a rotor with a drive shaft, the stator is installed in the housing of the wrench on the rotation wheel and is kinematically connected to the gearbox, and the spindle is rigidly connected to the housing

LI 3 exciter. The disadvantage of this wrench is that in order to achieve high tightening torques, it is necessary to have a significant sign-wise moment on the spindle, which can be increased only by increasing the gear ratio of the stator kinematic chain.

This also leads to the fact that in the period of free screwing the nut the spindle rotates at a reduced number of revolutions, and consequently, the total tightening time increases. Thus, the known wrench designed to produce large

10 tightening torques, low productivity.

The purpose of the invention is to increase the torque torque.

The goal is achieved

15 in that the electric vibrating wrench contains a housing with a handle, an actuator including a rotor and a stator, a gearbox, a rotary oscillation exciter, including a housing

20 and a drive shaft, two elastic-damping couplings, one of which connects the housing of the exciter with the gearbox, the other - the rotor with the drive shaft, the stator is installed in the housing

Claims (1)

25 of the wrench on the rotational supports and kinematically connected to the gearbox, and the spindle rigidly connected to the driver's body / fitted with a disk with a cam. On the hub, an elastic element of the torsion and an overrunning clutch; the output shaft of the drive is connected by an elastic element, the internal one of the overrunning clutch is fixed on the disk, and the external holder is fixed on the input wheel of the gearbox. FIG. 1 is a schematic diagram of an electric vibration wrench; FIG. 2, section A-A in FIG. 1. An electric vibrating wrench includes a housing 1 with a handle 2, an actuator comprising a rotor 3 and a stator 4, a reducer 5 with gear wheels 6-8, a causative agent of 9 rotary vibrations having a housing 10 and a drive shaft 11, two elastically damping couplings, one of which 12 connects the actuator housing 10 to the gearbox 5, another clutch 13 connects the rotor 3 to the drive shaft 11, the stator 4 is mounted in the housing 1 of the wrench on rotational supports and is kinematically connected to the gearbox 5, and the spindle 14 rigidly connected to the housing 10 pathogen. The wrench is provided with a disk 15 with a cam 16 on the hub, an elastic torsion element 17, for example, a springs spring, and a overrunning clutch 18, the inner race 19 is in the form of an asterisk mounted on the disk 15, the outer race 20 - on the output wheel 8 of the gearbox 5. The drive is made with a cam 22 interacting with a cam 16 of a disk 15 connected by an elastic element 17 with an output shaft 21 of the drive. The wrench works as follows. When the drive is turned on at the initial moment, when the nut is enlarged, and the resistance to screwing is low, the rotor 3 and the stator 4 begin to rotate in opposite directions. When the stator 4 rotates through the wheels 6-8 and the coupling 12, the spindle 14 rotates, and through the cams 16 and 22 is a disc 15, wherein the disc 15, together with the inner race 19 and the wheel 8 with the race 20, rotate in opposite directions so that the overrunning clutch 18 remains wedged — and does not interfere with the rotation. At the moment of contact of the nut end of the tightened threaded joint of the product surface, the resistance to screwing up sharply increases, and the spindle 14 is braked. As a result, the wheels 6-8 and the stator 4 also stop, and the disk 15 is rotated at an angle by inertia, while the elastic element 17 is twisted. At the moment the disk 15 stops, when all of the kinematic energy from the rotation of the disk 15 turns into potential energy twisting the elastic element 17, the latter, under the action of the twisted elastic element 17, tends to turn in the opposite direction, however, the overrunning clutch 18 is wedged and connects the disk 15 to the wheel 8. Then the force of the previously twisted elastic element 17 Procedure for the wheels 6 and 8 in mutually opposite directions, wherein the direction of its action coincides with the direction of tightening. From the rotor 3, the driver 9 rotary oscillations are driven. On the spindle 14 of the wrench, the vibratory symmetrical turning moment of the driver 9, the sign-constant moment of the kinematic chain of the stator 4, and the sign-constant moment of twisting of the elastic element 17 are summed up, and the threaded joint is tightened. In the wrench, large tightening torques are achieved without sacrificing performance, since the presence of a wrench 15 with an elastic element 17 in the design allows an increase in the total sign-constant moment on the spindle 14 without increasing the gear ratio of the gearbox. When the torque wrench offered by the wrench is equal to that of the prototype, the gear ratio rv of the ductor can be much smaller than that of the prototype, and therefore the free screwing speed is greater. Thus, the proposed wrench is more efficient than the known one. The invention of the electric vibration wrench on the author. St. 497125, which is equipped with a disk with a cam on the hub, an elastic torsion element and an overrunning clutch, the output drive shaft is made with a cam interacting with a disk cam connected by an elastic the element with the output shaft of the drive, the inner race of the overrunning clutch is fixed on the disk, and the outer race is fixed to the output wheel of the gearbox. Sources of information taken into account in the examination 1. Copyright, certificate of the USSR No. 497125, cl. B 25 B 21/02, 1974.