Screw extractor

 

The invention relates to the Assembly and disassembly of products, mainly forging connections. The stripper contains a yoke, a nut with a power screw mounted in a fixed position in the middle of the bar, and located on the traverse with the possibility of adjusting movement relative to the nut grips with the head part and the gripping hand. When the axes of the grippers and the axis of the power screw are located in one plane. The nut is made with a threaded hole for the power screw and the hole, the axis of which is perpendicular to the axis of the threaded hole into which is pressed the traverse. While in traverse executed axial hole for free placement of the power screw. The puller is supplied screws with cylindrical ends mounted in the head part of the grips. And the yoke is cylindrical with longitudinal grooves on the outer surface, in which the cylindrical ends of the screws for the adjusting movement of the grippers along the traverse. The invention will reduce the deformation of the beam under load, to increase reliability, maintainability and manufacturability. 1 C.p. f-crystals, 3 ill.

The invention relates to the Assembly and disassembly of products, mainly pre the contains associated with the power drive screw bearing element and the working body in the form mounted on the sliding rod grip. The feature extractor is the presence of additional seizures, pivotally connected with the sleeve installed on the power screw, while sliding the grip is made in the form of a spring collet.

The lack of a stripper - narrow scope due to the fact that it provides Assembly and disassembly of the connection with the power spring, in particular quick bortezomib aircraft.

In the book C. M. Semenov. Custom tools for disassembly and Assembly works, -M. : Kolos, 1970, it is noted that the screw pullers due to the simplicity of design widespread. Their main item is the power screw is screwed into the yoke. To traverse the attached thrust (Fig. 143 books Semenov), which, in turn, hold the grips. It is noted that worn-out thread repair difficult. So traverse the threaded holes install the nut.

The lack of screw extractor - communications grips with traverse rods - reduces rigidity and ease of maintenance, and, in addition, the puller does not allow removal for internal ledges.

Known screw pullers SKF (Sweden) and firms Baldur (Germany). Power screw pullers these firms Wernau paws, connected with the head. Revolution grips the outer puller became the inner and Vice versa.

The presence of the bar with threaded power screw reduces the durability and maintainability of a stripper due to thread wear, especially under heavy loads. The disadvantage is the complicated form of the bar - don't save us from the danger of deformation and destruction of a stripper in a dangerous section under maximum loads.

Feature screw pullers, described in the Handbook Yakovlev, C. N. Reference locksmith-installers. Ed. 3, revised and supplemented, -M.: Mashinostroenie, 1976, pages 184-185, is that they eat provide details grips and power screw, stop screw in the counterpart piece. The design of the stripper contains the power screw is screwed into the yoke of rectangular cross-section, clamps and washers to prevent gatherings gripper c of the bar. Almost the same design of the puller shown in the Handbook, Assembly and installation of engineering products", I. 1, edited by B. C. Korsakov, V. K. Zamyatin, -M.: Mashinostroenie, 1983, page 105, Fig.6. These designs are selected for the prototype.

The disadvantage of these rods is the possibility of deformation of the bar at the highest load or decrease in axial force due to n is, and the lack of production due to the need to strengthen the dangerous section of the beam at the connection point c of the power screw by increasing the transverse and/or longitudinal profile of the bar.

The task of the invention is to eliminate or reduce the disadvantages of the known design of the screw rods. The technical result is the reduction of the deformation of the bar under load, increase reliability, maintainability and manufacturability.

The technical result is ensured by the fact that in the known screw extractor containing traverse in the middle of which still installed nut c power screw, and positioned with the possibility of adjusting movement relative to the nut clamps c head part and the gripping claw, and when the axes of the grippers and the axis of the power screw are situated in one plane, carried out the following improvements. The nut is made with a threaded hole for the power screw and the hole, the axis of which is perpendicular to the axis of the threaded hole into which is pressed the traverse. In traverse executed axial hole for free placement of the power screw.

For possible installation (commissioning) move the grips on treemenu cylindrical ends of the screws, installed in the head part of the grips.

The design of the puller shown on the drawings, where Fig.1 shows a General view of Fig.2 is a longitudinal section a-a axis of the bar; Fig.3 is a transverse section of the beam and the head part of the capture cross-section B-B in Fig.1.

Power screw 1 is screwed in the nut 2, is rigidly mounted in the middle of the beam 3. Transect 3 with the possibility of adjusting movement relative to the nut 2 are mounted in the head part 4 and the gripping feet 5 fastened c head part 4 by bolts 6. The hooks 7 of the gripping legs 5 can be placed inside, and Vice versa. At the top of the screw 1 has a handle 8, and the bottom screw on the end of the cylindrical portion is pressed hardened ball 9.

The feature extractor is that the nut 2 is pressed onto the yoke 3 with its opening, the axis of which is perpendicular to the axis of the other screw holes 10 of the nut 2. Additionally, the nut 2 is fixed on the traverse 3 pin 11. The placement of the screw 1 in traverse promotes free hole 12 made in the middle of the beam size equal to the outer diameter of the thread power screw.

The traverse 3 is coaxially closed longitudinal grooves 13. In the head part 4 grips set screws 14, the cylindrical ends 15 cat is on grips c beam with the maximum dimensions of the disassembled parts and ensure finding the axis of the screw 1 and the axes of the gripping legs 5 in the same plane.

Works screw puller as follows.

The hooks 7 of the gripping claws 5 are based on projections or the end of the shoot details. While the hooks 7 can be arranged as shown in Fig.1, and an inverted depending on the conditions of removal. Power screw 1 with the handle 8, the nut 2 tempered ball 9 is based on the counterpart piece (not shown). Seizures in commissioning mode can be detected from the linear and angular displacement by screws 14, the ends 15 which are placed in the grooves 13. Nut 2 during the rotation of the handle 8 in the cylindrical surface of the nut hole 2 covers the outer diameter of the bar 3, redistributing the load on the screw 1 on the whole Central part of the beam 3 in contact with the nut 2. Dangerous section moves away from the center of the bar, thereby increasing the axial force can be transmitted to the stripper. This is the main advantage of the proposed screw extractor. It is obvious that the installation of the nut 2 with tension on the yoke 3 with its opening, the axis of which is perpendicular to the axis of the screw holes 10, shifts dangerous section to the ends of the beam, reducing the length of the shoulder forces to traverse the length of the nut hole 2. Since the deformation of the beam is directly proportional to the cube of the length of the ol. , -M. : Mashinostroenie, 1982, page 59, the first row of the table. 24), the deformation of the bar puller can be reduced by 1.5 or more times. For the same reason 1.5 or more times may be ceteris paribus increased axial force on the screw 1 puller.

Another advantage of the design is to reduce material consumption, improving the manufacturability due to the head plate and the nuts of the round rental as a power screw.

Serviceability and reducing injuries is provided by the presence on the outer surface of the traverse grooves 13, and the grips screws 14 that enables linear and angular fixation of seizures, especially at the maximum dimensions of the disassembled parts and maximum effort on the screw 1, the nut 2 and the handle 8.7

Claims

1. Screw extractor containing yoke, a nut with a power screw mounted in a fixed position in the middle of the bar, and located on the traverse with the possibility of adjusting movement relative to the nut grips with the head part and the gripping claw, and when the axes of the grippers and the axis of the power screw are located in one plane, wherein the nut is made with a threaded hole for the obverse, while in traverse executed axial hole for free placement of the power screw.

2. Screw the puller under item 1, characterized in that the supplied screws with cylindrical ends mounted in the head part of the grips, and the traverse is cylindrical with longitudinal grooves on the outer surface, in which the cylindrical ends of the screws for the adjusting movement of the grippers along the traverse.

 

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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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