SU1395474A1 - Nut-driver - Google Patents

Abstract

This invention relates to a mechanized hand tool for assembling and disassembling joints. The purpose of the invention is to expand technological capabilities. The wrench includes a housing 1, an air motor 3 located therein, a planetary gearboxes 4 and 5, and a pneumatic valve c. The torque generated by the pneumatic motor 3 is transmitted to the spindle 15 by means of planetary gearboxes 4 and 5. The reaction of the wheel 7 of the planetary gearbox 5 by means of the lever 8 is perceived by the short arm of the two arms. At the same time, the roller presses against the wedge surface of the rod, moving the pneumatic valve 6 to shut off the power supply of the engine 3 with air until the air is completely shut off. 3 il ..

Description

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Stock 1

Fig. /

This invention relates to a mechanized hand tool for assembling and disassembling threaded connections,

The purpose of the invention is the expansion of technological capabilities due to the approach of the center of gravity of the wrench to the handle and the improvement of working conditions.

Fig, 1 shows a wrench, a trodol section; FIG. 2 —Section A-A in FIG. 1.j in FIG. 3 - the same at the time of valve overlap.

The wrench contains body 1, throttle 2 deployed in it, pneumatchik 3, planetary gearboxes 4 and 5, and pneumatic valve 6. Wheel 7 with internal teeth of a planetary gearbox 4iyKTopa 5 is installed with a possibility of 1 rotation around a common axis of a nut wrench пров turn. the wheel 7 is protected by a lever 8 rigidly connected to it. The double-shouldered lever 9 is located on the rotation axis jo and rests against the adjusting spring 11 with its long arm. On the other hand, the housing 1 serves as a support for the rod 11. On the long 1; a roller 12 interacting with the wedge 1 is located; the surface 13 of the rod 14 is pneumatic- 1 |: lapana 6. Spindle 15, connected

4ecTKo with the shaft (not shown in the drawings) of the gearbox 5, serves to transfer the torque to the screwed nut (not shown).

Wrench works as follows about Yaz.

When the trigger is pressed, the compressed air passes through the throttle 2 and pneumatically But the valve 6 and enters the air motor 3, causing it to rotate. Its rotation is transmitted to planetary gearboxes 4 and 5, and from them to spindle 15,

When tightening the nut to the bolt (not shown), the torque created by the pneumatic motor 3 is transmitted to the spindle 15 by means of planetary gears 4 and 5, the reaction of the wheel 7 of the planetary gearbox 5 by means of the lever 8 is perceived by the short arm of the two shoulders lever 9, which on axis 10, it transmits the reduced force to the adjusting spring 11. The force perceived by NjaeMoe by the short shoulder of the two shoulders lever 9, and the force transmitted to the adjusting spring 11 by its arm length are in a ratio

IL ii p 1

2 D.,

where P is the force from the lever 8 caused by the reaction of the wheel 7 of the gearbox 5 (FIG. 2), P is the force on the adjusting spring 11 from the force 1 is the length of the short arm;

Ij - the length of the long arm. With an increase in 5 force of resistance to screwing the nut, the torque on the spindle 15 increases and, as a result, the reaction on the wheel 7 of the gearbox 5 and the force P, with which the lever 8 presses against the short arm of the double-arm lever 9.

The force P, which desires to compress the spring 11, grows accordingly. When the predetermined torque is reached, the force of the spring 11 is not enough to hold the lever 9, and it starts to rotate around the axis 10 in the direction indicated by the arrow (Fig 2) compressing the spring 11. At the same time With this roller 12 presses on the wedge surface 13 of the rod 14, moving the pneumatic valve 6 in the direction of power supply shutdown (Fig. 3) of the engine 3 with air until the air is completely shut off. The wrench stops.

Claims (1)

Invention Formula A wrench comprising a housing, a pnavomotor mounted therein, a pneumatic valve connected to it with a rod, a planetary gearbox, a lever connected to a wheel with internal teeth of a planetary gearbox, and an adjusting spring, characterized in that, in order to expand technological capabilities, the end surface of the rod is wedge-shaped, and the nut is equipped with a wrench mounted in the housing a lever with a short arm for engagement with the lever, and a long arm with an adjusting spring, and a roller attached to the end of the long arm for engagement with the wedge surface of the rod mon vmoklapana. ft-fi FI.2 Fi & W