Screw extractor

 

(57) Abstract:

The invention relates to the field of repair and can be used when removal connected with tension. On the cylindrical housing with a stepped axial cavity installed node capture. On both sides of the stepped cavity are guide holes. In parts of the cavity are auxiliary and working pistons forming a closed chamber filled with an incompressible fluid. In the guide holes of the housing moves the rods connected to the pistons. One of the rods connected to the auxiliary piston, made in the form of brisk. The auxiliary piston is spring-loaded in the direction of the working piston. The result is a pulsed character of the load to the dismantled parts. 1 Il.

The invention relates to the field of repair of various kinds of tyres and can be used when removal connected with tension.

Known screw puller consisting of a power screw and the support element [1]

The disadvantage of this puller is that the axial force on the screw depends on the physical capabilities of the worker and is insufficient to dismantle parts, machining is mportant surface, a stepped axial cavity and positioned on both sides of the cavity and coaxially with it the guide holes, knot engagement with a threaded hole, which features a case, as well as working and auxiliary pistons with rods placed respectively in the parts of the cavity larger and smaller diameter to form between them facing one another with their ends and the surface of the cavity of a closed chamber filled with an incompressible fluid, and the rods are located in the respective guide holes [2]

Specified known puller provides the application to the dismantled parts of the static load, insufficient in some cases to effect the disassembly of the connection.

Technical problem which the claimed invention is directed, is to expand the technological capabilities of the device, increasing its productivity and reduce labour costs by demolition work.

To solve the problem in the screw extractor containing cylindrical body with threads on the outer surface, a stepped axial cavity and positioned on both sides of the cavity and coaxially with it the guide holes, the node capture with rasimoviciute in parts of the cavity is large and a smaller diameter to form between them facing one another with their ends and the surface of the cavity of a closed chamber, filled with incompressible liquid, and the rods are arranged with the respective guide holes, the rod of the auxiliary piston is made in the form of a firing pin and guide hole of the body under him with a smooth surface, while the auxiliary piston is spring-loaded in the direction of the working piston.

The drawing shows a screw extractor.

Screw the puller comprises a cylindrical housing 1 with resibo 2 on the outer surface and a stepped axial cavity 3, on either side of and coaxially with her arranged guide holes 4 and 5. In parts of the cavity has a work 6 and 7 auxiliary pistons with rods, forming its facing one another with their ends and a side surface of the cavity of a closed chamber filled with an incompressible fluid 8. The rods 9 and 10 are located in the guide holes 4 and 5 respectively. The rod 9 is made in the form of a firing pin and guide hole 4 under it with a smooth surface. The auxiliary piston 7 is spring-loaded in the direction of the working piston 6 by a spring 11. The body 1 is installed in the threaded hole of node capture, including the nut 12 and the gripping elements 13.

The extractor works as follows.

Capture in this case a 1 is brought to a stop at the end of the shaft 15. When this occurs, the movement of the rod 10 with the working piston 6 and, under the pressure of the liquid, the movement of the auxiliary piston 9, bringing the unit out of the housing 1, i.e., the steering cocked.

If the item 14 not budged, i.e., the force created by the workers, not enough, a strike by the holder, the auxiliary piston strikes the liquid, which passes the hammer on the working piston 6 and creates an additional axial force on the housing 1, which is designed to dismantle the item 14. Since the area of the auxiliary piston 7 is significantly less than the area of the working piston, the force of fluid pressure on the working piston is significantly higher than the impact force of the striker.

Use a screw extractor significantly reduces the labor for demolition work, because it requires to create additional axial forces only 1-2 hit by the striker.

Screw extractor containing cylindrical body with a threaded outer surface, a stepped cavity and positioned on both sides of the cavity and coaxially with it the guide holes, knot engagement with a threaded hole, which features a case, as well as working and auxiliary pistons with rods, ramasundaram ends and the surface of the cavity of a closed chamber, filled with incompressible liquid, and the rods are located in the respective guide holes, wherein the stem of the auxiliary piston is made in the form of a firing pin and guide hole of the body under him with a smooth surface, while the auxiliary piston is spring-loaded in the direction of the working piston.

 

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FIELD: repairing equipment of shops, namely of locomotive depots of railway road transport vehicles.

SUBSTANCE: movable installation includes lifting table having lower wheeled platform and jointly mounted on it upper stand; mechanism for lifting and descending said stand; power hydraulic cylinder mounted on upper stand and communicated by means of hydraulic lines through control unit with high-pressure pump system; clamping device for mounting-dismounting bearing assemblies. High pressure pump system includes tank, pump aggregate, draining pipeline, suction pipeline connecting inlet of pump aggregate with tank. Lifting and descending mechanism is in the form of hydraulic cylinder and it is mounted on lower platform. Pump aggregate is arranged on upper lid of tank and it is in the form of displacement hydraulic pump with electric motor. Filter is mounted in suction pipeline. Control unit is in the form of body having two built-in safety valves, tap distributor and built-in non-return valve. Manometer and additional filter connected with draining pipeline and having pouring hole are connected with control unit. Hydraulic lines are in the form of flexible hoses. Installation is provided with additional power hydraulic cylinder that forms together with connected in parallel main hydraulic cylinder unit of power hydraulic cylinders. Said unit of power hydraulic cylinders is placed on supporting sheet-plate mounted on upper stand with possibility of rotation or removal from upper stand and with possibility of moving in range of length of flexible hoses. Similar cavities of hydraulic cylinders are mutually communicated. Clamping device includes movable and stationary plates mounted respectively on rods and back lids of hydraulic cylinders and designed for joining tie rods of attachment.

EFFECT: enhanced reliability, no-failure operation of installation.

10 dwg

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