SU1468736A1 - Impact-action nut-driver - Google Patents

Abstract

And; j) shaving refers to a handheld power tool. The purpose of the invention is to simplify the design and reduce the size. The impact wrench is mounted on the nut of the threaded joint, the drive is activated and the casing 1 is pressed, the end cams 23 are engaged with the protruding ends 21 of the axes 19. The rotation from the drive shaft 2 is transmitted via gears 15 and 16 and the satellites 20 to the carrier 17 with the axles. 19, then through the cams 23 to the intermediate shaft 8 and through the K-shaped grooves 25, the ball 26 and the screw grooves 12 to the drummer 9, and through its working IO cams to the anvil spindle 3, tightening the threaded joint. As the resistance on the threaded connection increases, the striker stops, but as the intermediate shaft 8 continues to rotate, P1 Ric 26 begins to move in Y-obr 1 iiibix and screws:, 1 grooves 25 and 12. With: JT () M workers kh. The striker 10 of the striker 9 breaks from engagement with the working cams 5 1-pin-nits; -. 1 and 3. after which the impact-pic 9 helps.1 / rotate together with the intermediate shaft 1m 8 and simultaneously under the action of pin I; clashing back to the original plot and ff; hitting the working cams 5 of the shchpnde.1 - anvil 3. tightening the threaded joint. 1 il. V (L с: 05 00 vj oo O5

Description

The invention relates to a handheld pulse mechanized tool and can be used in various industries in the industry for tightening and disassembling threaded connections.

The purpose of the invention is to simplify the design and reduce the size by changing the design of the friction clutch.

The drawing shows a hammer nut, a longitudinal section.

The impact wrench includes a housing 1, a drive (not shown) placed in it with an output shaft 2, an anvil spindle 3 with a turnkey head 4 at one end, end working cams 5 and a central hole 6 at the other, kinematically connected to the output the shaft 2 through the planetary gearbox and the start-up clutch, spring-loaded in the direction of the spindle anvil 3 by the spring 7 intermediate shaft 8, disposed at one end in the central hole in the spindle-anvil 3. and enclosing the intermediate shaft 8 and the drummer 9, kinematically associated with it that The spring working cams 10 are spring-loaded in the direction of the spindle — the anvil 3 with the spring 11. On the inner surface of the projectile 9 there are screw grooves 12. To reduce friction in the aperture 6 of the spindle — the anvil 3 are placed the ball 13, and in the intermediate shaft 8 — the ball 14 .

The planetary gearbox includes central gears 15 and 16 with outer and inner teeth, a carrier. 17 with the output shaft 18 and the satellites 20 placed on the axes x 19. The ends 21 of the axes 19 the satellites 20 are made protruding beyond the butt of the carrier 17, facing the output shaft 18, and with the carrier 17 form a half-clutch engagement. The intermediate shaft 8 is made with a flange 22, having end cams 23 and forming with them the coupling half, with a central blind hole 24 for the output shaft 18 of the carrier 17 and V-shaped grooves 25 located on its outer cylindrical surface. Balls 26 are placed in 1 / -shaped grooves 25 and screw grooves 12 of the intermediate shaft 8 and the hammer 9, respectively, which carry out the kinematic connection of the hammer 9 with the intermediate shaft 8. The central gear wheel 15 with the outer teeth of the planetary gearbox is made at the end of the output shaft 2 .

Impact wrench works as follows.

The nutrunner is mounted on the nut of the threaded joint (not shown) and turns on the drive, while the rotation from its output shaft 2 through the central gear wheels 15 and 16 of the external gearing on

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Tellis 20 is transferred to the carrier 17 with the output shaft 18 and the axles 19 of the satellites 20 placed in it. Then they push the housing 1 towards the tightened threaded joint and, overcoming the spring force 7, engage the coupling half of the coupling, i.e. the cams 23 of the collar 22 with protruding ends 21 of the axes 19, while the intermediate shaft 8 begins to rotate together with the planet carrier 17 and through the K-shaped and helical grooves 25 and 12, respectively, and the ball 26 placed in them transfers torque to the drummer 9.

Since the cams 10 of the hammer 9 are engaged with the working cams 5 of the spindle anvil 3, the latter, rotating, transmits the torque to the nut of the clamped threaded joint. As the nut is tightened, the resistance to rotation in the threaded connection increases and the anvil spindle 3 is braked. As a result, the drummer 9 is braked in rotational motion.

As the intermediate shaft 8 continues to rotate, as a result of the interaction of the Y-shaped groove 25, the ball 26 and the screw groove 12, the impactor 9 moves axially away from the spindle anvil 3, compressing the spring 11.

Then, the working cams 10 of the striker 9 are disengaged from the working cams 5 of the anvil spindle 3. After that, the impactor 9 starts to rotate together with the intermediate shaft 8 and under the action of the spring 11 moves to its original position. The cams 10 engage with the cams 5 of the anvil 3 anvils and strike them at which the kinetic energy of the accelerated striker 9 is transferred to a tightenable threaded connection, where it is converted into a pulling operation. Further, as long as the drive and clutch are engaged, the blows are periodically repeated in the described sequence.

Claims (1)

Invention Formula A impact wrench comprising a housing, an actuator with an output shaft, an anvil spindle with a turnkey head at one end and face working cams at the other, an intermediate shaft kinematically connected to the output shaft through a planetary gearbox including central gears with external gears. and internal teeth, drove with the output shaft and the satellites placed on it on the axles, a turn-on clutch consisting of two cam coupling halves, and covering the intermediate shaft and the kinematically connected drum with it working cam, spring-loaded in the direction of the spindle anvil. characterized in that, in order to simplify the shaft and drove is spring-loaded relative to the structure and reduce the size, but the latter, and the ends of the axes of the satellites, the intermediate shaft is made with a collar, made protruding behind the end face leading fist jaws and shaped, facing in the direction of its output with them one cam half-shaft shaft, and form with the carrier another sweat, the central hole for the output lumpage