SU1445929A2 - Power nut-driver - Google Patents

Abstract

This invention relates to a mechanized tool of rotational impact. The purpose of the invention is the expansion of technological capabilities. The wrench comprises a housing 1, an E drive 2 mounted thereon, a spindle 4 connected to the output shaft 3 via a single-acting gear face coupling. The spindle 4 is covered by a sleeve 8 with cams 9 spring loaded 10 in a tangential direction. In case 1, electromagnetic inductors 11 with turns 12 are fixed parallel to the axis of spindle 4. Sleeve 8 is connected to spindle 4 with a single-sided end gear coupling. In case 1 a ring inductor 17 is fixed with turns 18, which together with turns 12 are included in the discharge circuit of a capacitor battery. The disk 19 is spring-loaded to the inductor 17. At the end of the spindle 4, a sleeve 21 is placed. When the actuator 2 rotates at the moment of reaching the limiting moment, the leading coupling half 5 is pressed from the driven 6 and closes the discharge circuit of the capacitor battery 12 and 18 through the switch lever magnetic fields are induced, under the action of which the sleeve 8 with the cams 9 rotates and, through the coupling halves 14 and 15, makes a threaded connection. At the same time, the disk 19 strikes the hub 21 and shrinks the bag. 5 il. a o (L

Description

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The invention relates to a mechanized tool of rotary impact, can be used in various industries in the assembly of threaded connections and is an improvement of the invention according to the author. St. No. 1315283.

The purpose of the invention is the expansion of technological capabilities by strengthening the joint of the assembled parts due to additional shock pulses transmitted to the tightened threaded joint in the axial direction.

FIG. 1 shows a wrench, a longitudinal section; in fig. 2 shows section A-A in FIG. I; in fig. 3 is a view B in FIG. one; in fig. 4 is a wrench wiring diagram; in fig. 5 - Diagram of the wrench installation on the clamping plate. My threaded connection.

The wrench contains a housing 1, placed therein a drive 2 with an output shaft 3 ..

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spindle 4 connected to the output shaft - 3 by means of a driver, which is made in the form of a single-acting gear coupling, driving the coupling half 5 which is mounted on the output shaft 3 and is spring-loaded in the direction of the driven coupling half 25 you have a spring 7.- The driven coupling half 6 is fixed at the end of the spindle 4, which is covered by the sleeve 8 with the cams 9 located diametrically opposite, while the sleeve 8 is spring-loaded in the tangential direction by the spring 10. In case I, electromagnetic inductors II are attached parallel to the cams 9 12 located in the plane and included in the discharge circuit of the capacitor battery 13. Sleeve 8 is kinematically connected with

interaction with the disk 19. In case 1, a limit switch 25 with a lever is installed, built into the electric circuit of the control of the surge capacitor 26 and intended for periodic interaction with the leading coupling half 5. The discharge capacitor 26 is built into the electrical circuit: capacitor battery 13 - coils 12 and 18 inductors 11 and 17, respectively. A screwdriver 27 or a nut driver (not shown) can be installed on the turnkey head 23, for example, to interact with a screw head 28 or a nut 29, respectively. The circuit of turns 12 and 18 incorporates rheostats 30 and 31, respectively, by which the charging value of the capacitor battery 13 is controlled.

The wrench works as follows.

Before starting work on the turnkey head 23, the bushings 21 are secured, for example, a screwdriver 27 and installed in the slots of the countersunk screw head 28, previously pressed onto the threaded part of the part or nut 29 installed on the other side of the assembled package 32. the output shaft 3 through the drive 5 and the driven 6 semi-coupling, the spindle 4, the sleeve 21 and the screwdriver 27 transfers the torque to the threaded connection, tightening it. As the threaded connection is tightened, the resistance at the tightening increases and, accordingly, the torque increases. When a certain torque is reached, the leading coupling half 5 moves away from the driven coupling 6, compresses the spring 7 and interacts with the lever of the limit switch 25, which turns on the electrical circuit with the ratchet 4 using the ratchet mechanism 26, the latter closes the bit. , made in the form of an additional torus circuit: a capacitor battery 13 — coils of a single-ended gear coupling of one-sided acting-12 inductor 11 and a capacitor battery; additional leading coupling half 13 — coils 18 of the inductor 17. As a result, 14 of which rigidly fixed at the end of the sleeve — discharge of the accumulated energy of the horse 8 occurs, additionally knowing the coupling half 15 of the 40 capacitor battery 13 through the turns 12 and 18

mounted on rod 4 with the possibility of joint rotation and relative axial movement and spring-loaded to the side of the coupling half 14 by a spring 16. In the case 1 there is also an axial percussion mechanism, made in the form of rigidly connected to the case 1 and freely enclosing the spindle 4 of a flat annular inductor 17 with turns 18, included in the discharge circuit of the capacitor battery 13, a disk 19 freely enclosing the spindle 4, spring 20 connected to the ring inductor 17 and mounted on the output end of the spindle 4 s zmozhnostyu joint rotation and relative axial movement of the sleeve 21, the spring-loaded by a spring 22 toward the disk 19 and the boiling The available at one end a head 23 and a key collar 24 on the other for the periodic

inductors II and 17, respectively; a high-current pulse passes through coils 12 and 18 and a high-voltage magnetic field is induced in coils 12 and 18. Simultaneously in the cams 9 sleeves 8

and the disk 19 is induced by eddy currents, which, interacting with the magnetic field of the corresponding inductor, create dynamic forces, under the action of which, on one side, the sleeve 8, together with the cam-50, 9 begins to rotate about the axis of the spindle 4 at high speed, on the other at the same speed, the disk 19 begins to move toward the sleeve 21. Rotating, the sleeve 8 carries along the additional drive coupling half 14, which through the additional driven coupling coupling 15 transfers the rotation to the spindle 4 and then Screwed threaded connection.

interaction with the disk 19. In case 1, a limit switch 25 with a lever is installed, built into the electric circuit of the control of the surge capacitor 26 and intended for periodic interaction with the leading coupling half 5. The discharge capacitor 26 is built into the electrical circuit: capacitor battery 13 - coils 12 and 18 inductors 11 and 17, respectively. A screwdriver 27 or a nut driver (not shown) can be installed on the turnkey head 23, for example, to interact with a screw head 28 or a nut 29, respectively. The circuit of turns 12 and 18 incorporates rheostats 30 and 31, respectively, by which the charging value of the capacitor battery 13 is controlled.

The wrench works as follows.

Before starting work on the turnkey head 23, the bushings 21 are secured, for example, a screwdriver 27 and installed in the slots of the countersunk screw head 28, previously pressed onto the threaded part of the part or nut 29 installed on the other side of the assembled package 32. the output shaft 3 through the drive 5 and the driven 6 semi-coupling, the spindle 4, the sleeve 21 and the screwdriver 27 transfers the torque to the threaded connection, tightening it. As the threaded connection is tightened, the resistance at the tightening increases and, accordingly, the torque increases. When a certain torque is reached, the leading coupling half 5 moves away from the driven coupling 6, compresses the spring 7 and interacts with the lever of the limit switch 25, which turns on the electric circuit of the discharge circuit 26, the latter closes the discharge circuits: capacitor battery 13 - coils 12 of the inductor 11 and the capacitor battery 13 are turns 18 of the inductor 17. As a result, the accumulated energy of the capacitor battery 13 is discharged through the turns 12 and 18

inductors II and 17, respectively; a high-current pulse passes through coils 12 and 18 and a high-voltage magnetic field is induced in coils 12 and 18. Simultaneously in the cams 9 sleeves 8

and the disk 19 is induced by eddy currents, which, interacting with the magnetic field of the respective inductor, create dynamic forces, under the action of which on one side the sleeve 8, together with the cam-0 9, begins to rotate about the axis of the spindle 4 at high speed, on the other at the same speed, the disk 19 begins to move toward the sleeve 21. Rotating, the sleeve 8 carries along the additional drive coupling half 14, which through the additional driven coupling coupling 15 transfers the rotation to the spindle 4 and then Vai threaded connection.

Simultaneously with the rotation of the sleeve 8 with the cams 9, the disk 19, compressing the spring 20, hits the end of the collar 24 of the sleeve 21, the latter, compressing the spring 22, together with the disk 19 moves at high speed relative to the spindle 4 in the axial direction, transmitting a power impulse to the blind the screw head 28, by superficial plastic deformation of the walls of the conical hole of the hole and additional compression of the assembled package 32. The tightening and pressing forces are determined by the amount of energy stored by the capacitor battery 13, and The relationship between these efforts is regulated as needed.

Circuit coils 12 and 18, disconnect coils 18 of the inductor 17 from the discharge circuit and include coils 12 of the inductor 11 in this circuit. The nut head is mounted on the nut previously attached to the bolt and turn on the drive 2 of the wrench, while the torque through the output shaft 3 , leading 5 and driven 6 half couplings, pin 4, and the wrench head are transmitted to the tightening joint by tightening it. When a certain torque is reached, the leading coupling half 5 moves away from the driven coupling half b, compresses the spring 7 and interacts with the lever of the limit switch 25, which includes the spreading limits of the switches 30 and 31, on- 15 times 26 in the electrical circuit: turns 12

turns of 12 and 18 inductors 11 and 17 into an electrical circuit. When an impact-rotation mechanism is triggered, sleeve 8 with cams 9 rotates much faster than drive 2 under the action of a pulsed magnetic field. Due to this, the coupling half 6 slides relative to the leading coupling half 5, and the drive 2 is not affected by the impulse torque. At the same time, the lever of the limit switch 25 breaks the circuit of the arrester 26, switching the capacitor battery 13 to the charging mode. After this, the drive 2 is stopped and, if necessary, after a certain period of time due to the charging period of the capacitor battery 13, the drive 2 is turned on again and the threaded connection is reached with the package 32 depressed by a subsequent torque pulse and axial force. The wrench is then rearranged to a new, threaded connection to be tightened, and the entire 35 cycle is repeated in the specified sequence.

inductor 11 - capacitor battery 13. As a result of discharge of condensate battery 13 through coils 12 and interaction of eddy currents induced in the cams 9 of sleeve 8 with inductor 11 magnetic field, sleeve 8 rotates at high speed relative to the axis of the spindle 4 and transmits a pulse through the ratchet torque on the spindle 4 and further on the tightenable threaded joint, tightening it.

When performing conventional tightening of threaded connections (without pressing the fastener into the hole with radial tension and strengthening the hole zone with high-speed plastic deformation), a nut head is attached to the head 23 from the side of the nut before starting the operation and mounted on the pre-threaded part of the bolt. A switch built into the discharge circuit of the inductors I and 17, coils 18 of the inductor 17 are disconnected from the discharge circuit, and when the capacitor battery 13 is discharged through the coils 12 remaining in the circuit, the pulse head acts on the tapped threaded connection Because there is no magnetic field in the winding 18 of inductor 17, as a result, there is no axial force pulse and the threaded connection is tightened only by the generated torque.

The proposed wrench also permits the insertion of both blind and conventional bolted joints with radial tension. In this case, after pressing the bolt into the hole, the tightening is done from the side of the nut. At the same time, before starting the operation, a switch (not shown) integrated into the discharge circuit of turns 12 and 18 of inductors 11 and 17, turns 12 are disconnected from the discharge circuit, and discharge switch 26 is controlled from the control panel by a wrench. A crimp (not shown) is fastened on the head 23 and pressed against the head of the bolt previously directed into the hole. The capacitor battery 13 is discharged through the turns 18 of the inductor 17, and the disk 19 through the sleeve 21 and the crimp transmits an axial force impulse to the bolt, pressing it into the opening of the assembled package. After that, the crimp from the head 23 is removed and the nut head is fixed on it. A switch built-in bit

Circuit coils 12 and 18, disconnect coils 18 of the inductor 17 from the discharge circuit and include coils 12 of the inductor 11 in this circuit. The nut head is mounted on the nut previously attached to the bolt and turn on the drive 2 of the wrench, while the torque through the output shaft 3 , leading 5 and driven 6 half couplings, pin 4, and the wrench head are transmitted to the tightening joint by tightening it. When a certain torque is reached, the leading coupling half 5 departs from the driven coupling half b, compresses the spring 7 and interacts with the lever of the limit switch 25, which turns on the voltage switch 26 into the electrical circuit: turns 12

inductor 11 - capacitor battery 13. As a result of discharge of condensate battery 13 through coils 12 and interaction of eddy currents induced in the cams 9 of sleeve 8 with inductor 11 magnetic field, sleeve 8 rotates at high speed relative to the axis of the spindle 4 and transmits a pulse through the ratchet torque on the spindle 4 and further on the tightenable threaded joint, tightening it.

When performing conventional tightening of threaded connections (without pressing the fastener into the hole with radial tension and strengthening the hole zone with high-speed plastic deformation), a nut head is attached to the head 23 from the side of the nut before starting the operation and mounted on the pre-threaded part of the bolt. A switch built into the discharge circuit of the inductors I and 17, coils 18 of the inductor 17 are disconnected from the discharge circuit, and when the capacitor battery 13 is discharged through the coils 12 remaining in the circuit, the pulse head acts on the tapped threaded connection Because there is no magnetic field in the winding 18 of inductor 17, as a result, there is no axial force impulse and the threaded connection is tightened only by the generated torque.

Claims (1)

Invention Formula Wrench auth. St. No. 1315283, characterized in that, in order to expand technological capabilities, it is equipped with an axial percussion mechanism, made in the form of a ring inductor, which is freely enclosed in the spindle, of a ring inductor, included in the discharge circuit of a capacitor battery, freely spindle spindle, spring-loaded to the ring inductor and installed on the output end of the spindle with the possibility of joint rotation and relative axial movement of the sleeve, spring-loaded towards the disk and having a collar at one end for periodically interacting with the disk, and at the other end - a turnkey head. 12 Phie.g 13 g tj pqi .l ljl 25 MB Fig.Z P w