SU1452668A1 - Stud driver - Google Patents

Abstract

The invention relates to a handheld mechanized tool and can be used in all industrial fields during fitting and assembly work, in particular for tightening the studs. The purpose of the invention is to improve working conditions and increase service life. The stud includes a drive, spindle 1 and working head 4 with TWO perpendicular axial 9 and radial 10 hydraulic cylinders.

Description

I

The invention relates to a handheld mechanized tool and can be used in all industrial types for fitting and assembly work, in particular for screwing in studs.

The purpose of the invention is to improve working conditions and increase service life by eliminating the unscrewing of the hairpin.

The drawing shows a stud, longitudinal section.

The spline driver contains a drive with spindle 1. The DRIVE is made in the form of a cup 2 having an annular conical groove 3. Inside the cup 2 there is a working head 4, kinematically connected with it by a shank 5 and having the possibility of axial movement. At the end of the working head 4 and coaxially with it, a replaceable threaded insert 6 is placed with a central threaded hole 7 for a fixed, pin 8.

The working head 4. is made with two perpendicular axial 9 and radial 10 hydraulic cylinders, respectively, communicating with each other through channel 11. The piston 12 of the axial hydraulic head 9 is spring-loaded 13 towards the screw-in pin 8 and abuts against its end 14. The piston of the radial hydraulic cylinder 10 is made of two parts 15 and 16. Part 15 is spring-loaded in the axial direction by a spring 17, and part 16 has a rod 18, parts 15 and 16 when the rod 18 interacts with the face of part 15 and the body of the radial hydraulic cylinder 10, an annular cavity 19 communicating with the axial cavity of the hydraulic cylinder 9. The part 16 of the piston cylinder 10 has a radial latch 20 as rolling bodies for

ten

15

20

five

0

five

0

interaction with the groove 21. performed on the inner wall of the glass 2.

Stud works as follows.

A replaceable insert 6 is mounted on the operating head 4. The included stud is aligned and brought into contact with the threaded stud 8. At the same time, the torque from the drive through the spindle 1, the cup 2 and the shank 5 is transmitted to the operating head 4. The replaceable insert 6 starts to screw on the threaded end of the stud 8 until the piston 14 of the piston t2 comes into contact with the y-rod, the pressure in the hydraulic cylinder 9 increases. Since the channel 11 is blocked by part 16 of the piston, the end of the stud 8 is wedged in the threaded hole 7 of the interchangeable insert 6, thereby tightening the stud 8 until the required tightening torque is reached and then the drive is turned off. After this, the Stud is retracted from the screwed stud 8 along its axis, while the working head 4 remains in place, and the bowl 2 with the drive moves until the lock 20 enters the tapered groove 3. As a result, the piston moves with the action of the spring 17 and the annular cavity 19 combines to the channels 11, which leads to the flow of fluid from the hydraulic cylinder 9 into the hydraulic cylinder 10 and, consequently, to a drop in pressure. In this case, the stop 14 of the piston 12 moves away from the end of the stud 8, freeing it from jamming in the threaded hole 7 of the insert 6, and the stud is screwed from the threaded end of the stud 8. As the stud 8 screws, the piston 12 returns to its original position under the action of the spring 13, the fluid from the hydraulic cylinder 10 returns to

part 15 piston

hydrocyliidr 9 and

The hydraulic cylinder 10 is pushed by the action of the spring 17 up to the stop into the rod 18 of the piston part 16.

In the working position, the stud screw is driven by an axial force applied to the working head 4, while the latch 20 is released along the tapered groove 3 of the cup 2 from the annular groove 21, the spring 17 is compressed through the rod 18 and the annular cavity 19 is displaced and the hydraulic cylinder piston 10 is closed channel

a pin and two communicating via a channel axial and radial cylinders, the piston of the latter of which is made with a retainer for interacting with the glass, characterized in that, in order to improve the working condition and increase service life, the piston of the radial hydraulic cylinder is spring-loaded in the axial direction and is made of two parts, one of which has

a rod that cbases when the rod interacts with the end of the other part and the body, 11, disconnected by that hydraulic cylinder of the radial hydraulic cylinder of the ring tLi Q tr LG

9 and 10.

Then the cycle repeats in the sequence indicated.

Claims (1)

1. A stud-bearing containing a drive, made in the form of a cup, mounted therein with the possibility of axial movement of the working head with a central threaded hole under cavity, periodically communicating with the cavity of the axial hydraulic cylinder, and on the inner wall of the glass from the side of the working head 2Q annular conical bore for exiting piston of radial hydraulic cylinder and groove for engagement with retainer. 2, The stud screw of claim 1, about 25 tons and 25 in that the retainer is made in the form of a rolling body. 452668- a pin and two communicating via a channel axial and radial cylinders, the piston of the latter of which is made with a retainer for interacting with the glass, characterized in that, in order to improve the working condition and increase service life, the piston of the radial hydraulic cylinder is spring-loaded in the axial direction and is made of two parts, one of which has cavity, periodically communicating with the cavity of the axial hydraulic cylinder, and on the inner wall of the glass from the side of the working head an annular conical groove for the outlet of the piston of the radial hydraulic cylinder and a groove for interacting with the retainer. 2, The stud screw of claim 1, wherein the retainer is made in the form of a rolling body.