SU1574447A1 - Power nut-setter - Google Patents

Abstract

This invention relates to a mechanized tool. The purpose of the invention is to increase reliability by changing the design of the mechanism for switching the spindle speeds and reducing the number of parts moving in the axial direction. When the actuator 2 is turned on, the rotation from the latter through the first and second stages of the planetary gearbox 5 is transmitted to the spline roller 12 with the leading coupling half 16 of the outer coupling with face cams 17 and then through the end cams 21 of the driven half coupling 20 of the outer coupling to the last, then driving. 15 and onto the spindle 3 with the head 4. Spindle 3 is accelerated to rotate and, accordingly, the nut is tightened into the screwed-in connection. As the resistance in the thread of the screwed-in threaded connection increases, the drive 2 is disconnected. Compressed air is supplied to the working chamber 14. Under pressure from the latter, the annular piston 13 together with the leading coupling half 16 moves toward the carrier 9, compressing the spring 18. In the course of movement of the circular piston 13, the end cams 17 and 21 of the leading 16 and the driven 20 half coupling respectively out of the meshes, and the cams 22 and 23, radially disposed on the inner cylindrical surface of the drive half coupling 16 and the shaft 24 of the central gear wheel 7, respectively, engage. The drive 2 is switched on again, the rotation from the latter is transmitted to the spindle 3 through three stages of the planetary gearbox 5, while tightening the threaded joint is carried out at a lower speed and a large moment. 4 il.

Description

one

(21) 4468485 / 25-28

(22) 08/01/88

(46) 30.06.90, Bulle „№ 24

(71) Specialized design bureau for the mechanization and automation of fitting and assembly work

(72) V.N. Sorokin, S.V. Zharov and V.B. Voronkov

(53) 621.883 (088.8)

(56) USSR author's certificate

No. 1004088, class „B 25 B 21/00, 1981.

USSR author's certificate, U 1485619, cl. B 25 B 21/00, 19870

(54) WAYER

(57) The invention relates to a mechanized tool3. The purpose of the invention is to increase reliability by changing the design of the mechanism for switching spindle speeds and reducing the number of parts moving in the axial direction. When the actuator 2 is turned on, the rotation from the latter through the first and second stages of the planetary gearbox 5 is transmitted to the spline roller 2 with the leading coupling half 16 on the outer sleeve with the end cam mounted on it

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.Ј 17 and then through the end cams 21 of the driven half coupling 20 of the outer coupling onto the latter, then onto the carrier 15 and onto the spindle 3 with the head 4 "The spindle 3 is accelerated to rotate and the nut of the tightened threaded connection is screwed in accordingly. With an increase in the resistance in the thread of the screw connection, the drive 2 is disconnected. The working chamber 14 is supplied with compressed air, under pressure. The latter annular piston 13 together with the leading coupling half 16 moves toward the carrier 9, compressing the spring 18 "During the movement of the annular piston, the invention relates to a mechanized tool. And can be used in various types of industry during assembly and disassembly of threaded connections.

The purpose of the invention is to increase reliability by changing the design of the mechanism for switching the spindle speeds and reducing the number of parts moving in the axial direction.

FIG. 1 shows the proposed wrench, longitudinal section; FIG. 2 is a view A of FIG. 1; in fig. 3- wrench at the moment of switching on the third stage of the planetary gearbox; in fig. 4 shows a section BB in FIG. 3

I

The wrench includes a housing 1, a drive 2 located therein, a spindle 3 with a head at the end, kinematically connected with the latter through a three-stage planetary gear 5, in which the central gear wheels 6 and 7 with the outer teeth of each of the subsequent stages are connected with - the scrap (8 and 9) of the previous stage, the central gear wheels 10 and 11 with internal teeth are fixed in the housing 1, the carrier 9 of the second stage of the planetary gearbox 5 is rigidly connected to the pulley roller 12, and the mechanism for switching the speeds of movement of the spindle 3, which includes an annular piston 13, placed in the housing 1 and forming together with it a working chamber 14, and coaxially arranged couplings, kinematically

13, the end cams 17 and 21 of the drive 16 and the driven 20 half couplings, respectively, come out of the engagement, and the cams 22 and 23 radially placed on the inner cylindrical surface of the drive half of the clutch 16 and the shaft 24 of the central gear wheel 7, respectively, engage.

The drive 2 is turned on again, the rotation from the latter is transmitted to the spindle 3 through three steps, the planetary gear 5, while tightening the threaded joint is carried out at a slower speed and a large moment 4 or more.

the output link of the second stage of the planetary gearbox 5 — splined roller 12 — either with the central gear wheel 7 with the outer teeth, or with the planet carrier 15 of the third stage of the latter, leading the coupling half 16 of the outer coupling with face cams 17, is placed on

splined roller 12 with joint rotation and relative axial movement, spring-loaded relative to the carrier 9 of the second stage of the planetary gearbox 5 by spring 18 and through ball bearing 19 connected with an annular piston 13 with joint axial movement and relative rotation, driven by the coupling half 20

The couplings are fixed on the carrier 15 of the third stage of the planetary gearbox and have face cams 21, counter to the front cams 17 of the driving half coupling 16, the driving coupling half of the internal coupling made in the form of cams 22 radially placed on the inner cylindrical surface of the driving coupling half 16, and the coupling coupling half of the internal coupling made in the form of cams 23 radially placed on the cylindrical surface of the shaft 24 of the central gear wheel 7 with external teeth, which is mounted in a ball bearing 25 fixed on the carrier 15, the third stage planetary gear unit 5. The spindle 3 is fastened to the carrier 15 of the third stage of the planetary gear 5 with the bolt 26.

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The wrench works as follows.

The head 4 of the wrench is mounted on a pre-threaded nut of a threaded joint (not shown) and turns on the actuator 2, the rotation from the latter through the first and second stages of the planetary gearbox 5 is transmitted to the pinion roller 12 with the leading coupling half 16 placed on it and then through the driven coupling half 20, connected with the planet carrier 15, - onto the spindle 3 with the head 4. The nut is screwed freely at high speed of rotation, while the internal clutch is disengaged and its coupling half rotates freely in the bearing 25. As you move nchivani nut increases the resistance of a threaded joint, as judged, for example, by increasing the reactive torque on the wrench handle and last turned off. Then the compressed air passes through a distributor (not shown) into the working chamber 14, as a result of which the annular piston 13 together with the leading coupling half 16 moves towards the carrier 9 of the second stage, compressing the spring 18. In the course of the movement of the annular piston 13, the end cams 17 of the driving coupling half 16 the outer sleeve is disengaged from the end cams 21 of the driven half coupling 20, and the cams 22 of the internal coupling is engaged with the cams 13 of the lower half coupling, with the carrier 9 of the second stage of the planetary gearbox 5 through the splined roller 12, -we The lower and lower half of the coupling of the inner coupling is connected to the central gear 7 of the third stage of the planetary gearbox 5. After this, the drive 2 is turned on again, the rotation of which is transmitted to the spindle 3 with the head 4 through three stages of the planetary gearbox 5, while the spindle 3 rotates from low rotational speed and transmits a large torque through the head 4 to the tightened threaded connection and tightens it. When the maximum tightening torque is reached, the actuator 2 and the distributor are disconnected and the wrench is removed from the nut, while under the action of the spring I8 the annular piston 13 together with the driving coupling half 16 moves to the side

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the spindle 3, the end cams 17 of the leading coupling half 16 engages with the end cams 21 of the driven half coupling 20, and the cams 22 come out of the engagement with the cams 23 of the driven half coupling of the internal clutch and the third stage of the planetary gear reducer 5 turns off in the wrench,

JQ and the wrench itself is turned on for a high rotational speed and low torque transmission. After that, the wrench is relocated to another nut and carried out

15 puff in the above sequence.

Claims (1)

Invention Formula 20. A wrench comprising a housing, an actuator housed therein, a spindle with a head at the end, kinematically connected to the latter through a three-stage planetary gearbox, in which the central gear wheels with the outer teeth of each of the subsequent stages are connected to the carrier of the previous stage, and the central gears internal gears 30 teeth fixed in the housing, and the mechanism for switching the rotational speeds, including an annular piston, placed in the housing and forming a working chamber with it, and coaxially arranged couplings, kinematically connecting the output link of the second stage of the planetary gearbox or with the central gear wheel with external gears teeth Q or the carrier of the third stage of the latter, of which the leading coupling half of the outer coupling is made with face cams and is placed on the output link of the second stage of the planetary gearbox with the possibility of simultaneous rotation and relative axial movement, is spring-loaded relative to the carrier of the second stage and is kinematically connected with the ring With a piston with the possibility of joint axial movement and relative rotation, the coupling of the outer coupling half is fixed on the third stage carrier of the planetary gear torus and has face cams, which respond to the front cams of the driving half coupling of the outer coupling, characterized in that, in order to increase reliability, the driving half 35 the inner sleeve coupling is made in the form of cams, radially placed on the inner cylindrical surface of the drive coupling half of the outer coupling, and with the knowledge of the coupling half of the inner coupling, in the form of cams, a phage. V Editor T. Parfenova Fy Compiled by Yu Sergeev Tehred M. Khodanich Proofreader L. Beskid radially placed on the cylindrical surface of the shaft of the central gear wheel with the outer teeth of the third stage of the planetary gearbox. 23 Fy