SU837838A1 - Screw-driver - Google Patents

Description

(54) SCREWDRIVER

one

The invention relates to hand-held portable tools for assembling and disassembling threaded connections, drilling holes, threading and similar operations.

Hand-held tools for screwing and unscrewing threaded fasteners are known, comprising a housing, a spindle housed in the housing with a socket for a replaceable tool at one end, mounted on the end of the housing with a rotatable handle, a planetary gearbox connecting the handle with the spindle 1.

The lack of tools is that they provide only a certain type of work.

The closest in technical essence to the present invention is a screwdriver, comprising a housing, a spindle in it with a socket for an interchangeable tool and with a lock at one end, a planetary gearbox, which is sun-insulated at the other end of the spindle, and a handle rigidly connected with planetary gear carrier 2.

However, it is not possible to produce drillings, threading and other similar works with a known tool.

The purpose of the invention is the expansion of technological capabilities, namely the provision of drilling holes, threading and other similar operations.

The goal is achieved due to the fact that the screwdriver is equipped with two gear sleeves and a casing connecting them, enclosing the housing, installed with the possibility of axial movement and a handle spring-loaded in the direction, one of the gear couplings has a two-sided gear half coupling, located between the epicyclic gear of the planetary gearbox and a spindle on which counter-mounted gear coupling halves are installed, another gear-coupling coupling coupling the planetary gear carrier carrier to the holder, and the epicyclic scaffold planetary gearbox The gearbox is installed in the housing by means of a bearing.

Claims (2)

In addition, at the end of the spindle, there is a hex under the interchangeable working heads, a groove on one of the faces and a through radial hole communicating with the groove, and the lock is fixed in the groove and made in the form of a flat spring with a ball at one end, which is located in the through radial hole. The drawing shows a screwdriver, longitudinal section. The screwdriver comprises a housing 1 with upper and lower covers 2 and 3 correspondingly, in housing 1, the spindle 5 on the bearing 4, the planetary gear, including the sun gear 6, located at the end of the spindle 5, the epicyclic gear 7, based on the housing 1 through bearing 8 and carrier 9 with satellites 10 interacting with epicyclic and sun gears 6 and 7, respectively. A handle 11 is rigidly connected with the carrier 9,. located in the top cover 2 and the housing 1 through bearings 12 and 13. The housing houses two gear couplings connected by a choke 14 covering the housing 1, which is axially displaceable and spring-loaded in the direction of the handle I. One tooth coupling It contains a double-sided serrated half coupling located between the epicyclic gear 7 and the spindle 5, on which counter-toothed semi-couplings 16 and 17 are mounted. Another non-toothed coupling connects the holder 14 to the carrier 9 and includes two toothed coupling couplings, one of which is 18, tough associated with the yoke 14, and the other - 19 is made in one piece with the carrier 9. At the end of the spindle 5 protruding from the lower lid 3 there is a slot 20 under the shanks of the interchangeable tool (not shown), a hexagon 21 under s. heads 22, a groove 23 on one of the faces of the hexagon, and a through radial hole 24 communicating with the groove. In the groove 23 a retainer is fixed, made in the form of a flat spring 25 with a ball 26 at the end, which is located in the through-hole 24. The screwdriver works in the following sequence. At the end of the pinch 5, one of the necessary interchangeable tools is secured, for example a wrench head. A screwdriver is installed over the screwed-in threaded connection and, holding the holder 14 with one hand, twist the handle 11, and together with the handle 11 rotates the carrier 9 with the satellites 10, which run around the epicyclic gear 7 rigidly connected to the housing 1 through the gear half couplings 15 and 16, the sun gear 6 together with the spindle 5 is forced to rotate with acceleration, which transfers torque to the nut of the screwed-in threaded connection. For the final tightening, when the torque is increased, the holder 14 is shifted towards the nut head, while the coupling halves 15 and 16 are opened, and the coupling halves 18 and 19, 15 and 17 engage, thereby bringing the handle 11 through gear couplings and the yoke 14 is rigidly connected to the spindle 5, and the planetary gear is turned off, while the epicyclic gear 7 rotates freely in the housing 1. Due to the rigid connection of the handle 11 with the spindle 5, it is possible to transmit large torques. After tightening the nut, the yoke 14 is released and it returns to its original position. Claim 1. Screwdriver, containing body, located in it a spindle with socket for a replaceable tool and with a lock on one end, a planetary gear, with a sun gear fixed on the other end of the spindle, and a handle rigidly connected with the carrier The planetary gearbox is distinguished by the fact that, in order to expand technological capabilities, namely to ensure the drilling of holes, threading and other similar operations, it is equipped with two gear sleeves and a coupling that encloses them Mounted axially movable and spring-loaded at Stora Y handle, one of the toothed coupling has bilateral toothed coupling half disposed between the epicyclic gear of the planetary gear unit and schpindelem on which set response toothed yulumufty, another toothed coupling half binds to the carrier of the planetary gear unit with oboyMOI, and the epicyclic gear of the planetary gearbox is installed in the housing by means of a bearing. 2. Screwdriver according to claim 1, characterized in that at the end of the spindle there is made a hexagon under the s. Exchange working heads, a groove on one of the faces and a through radial hole communicating with the groove, and the lock is fixed in the groove and made in the form of a flat spring with a ball at one end, which is located in the through. radial hole. Sources of information taken into account during the examination 1. USSR author's certificate No. 327044, cl. B 25 B 17/02, 1968. 2. USSR author's certificate number 559817, cl. B 25 B 17/00, 1972 (prototype).