Crank stripper

FIELD: devices designed for simplifying procedures of assembling/disassembling units.

SUBSTANCE: crank stripper includes cross piece 1 supporting power mechanism in the form of one-way telescopic hydraulic cylinder 2 having thrust rod 3 for shaft of crank 14; mechanism for forced closing of foots having cylindrical discs 8, 9, paired plates 10 and double-arm levers 4,5. One arm is used for engaging with crank; other arm of is cone one and it may rest upon lateral surface of cylindrical disc secured to lateral side of cross piece. Double-arm lever whose arms are mutually inclined by obtuse angle is jointly mounted through paired plates in center of disc. Articulation joint of lever is mounted in edge portion of second lever arm on line of inner surface of first lever arm.

EFFECT: intensified clamping of part by foots, enhanced efficiency, lowered cost price of working operations.

2 dwg

 

The invention relates to metal-cutting machine tools; methods and devices for processing of metals, not included in other classes, in particular to devices for ease of Assembly and disassembly of metal parts or metal and non-metal, regardless of whether invoked or not thus any deformation, tools and devices for this purpose, if they are not classified in other classes; to connect products by press-fitting or dismantling pressed products; as well as hand tools or plumbing fixtures for Assembly or disassembly of assemblies and products with deformation or without it, are not classified in other headings and just for Assembly or disassembly of parts, a press fit, in particular of cranks on the pump beam type oil wells.

A device for fitting and removing parts (avts SU # 1696240 AND MCL. 23 P 19/02). Refers to the combined dual-use devices, i.e. for installation and removal of parts. Contains the elements of the power circuit and the associated power cylinder with a piston, the piston and the housing with the separation cavity, configured to connect respectively to sources of hydro - and nimodipine and a distribution valve with manual control mounted in the housing of the power cylinder; consequently, the sustained fashion an internal cavity and a nipple for connecting the cavity with a source of nimodipine, as well as rod-piston is made hollow and the grooves on the outer end surface of it, and in the case, and these cavities are interconnected and rod cavity of the power cylinder through holes formed in the housing and the rod, and the elements of the power circuit consists of two two shoulders arms with support surfaces on each of her shoulders and articulated with each of the rocker levers, placed parallel to the axis of the power cylinder, each of levers mounted in the grooves of the body and stem-piston interoperable reference surfaces of the shoulders with the surfaces of the grooves.

The disadvantages of this device is the ability to use only on specific details with the use of special technological equipment due to the implementation of elements of the power circuit at the ends of the power cylinder, a mix of hydro and nimodipine, which in turn does not allow you to develop a great effort during the removal of large parts, and it is impossible to use this device for removal of cranks on the pump beam type oil wells.

A device for dismantling forging connections details type shaft sleeve, including mounted on the base of the power cylinder with a piston rod movably fitted the authorized center and also grips with the actuator mounted on the cylinder body, and the actuator grips made in the form of fixed concentric with the power cylinder of the additional cylinder, a rod which is fixed on the housing of the power cylinder, and a casing connected by means of arms with grippers (see avts SU 606709 AND, ÁL 23 P 19/02 23.05.1978). This unit is adopted as the prototype of the claimed invention.

The disadvantage of this device is the narrow applicability due to the power circuit through the base, stripped grips with removable node with the development of high forces and large crank and the repetition device installation disruption grips with removable parts. This is because the productivity and quality of the dismantling of this device is achieved by the condition that the drive of the gripper in the form of fixed concentric with the power cylinder of the additional cylinder and the connection of the body through the arms with grippers.

The specified condition occurs only when the parallel levers grips the rod of the power cylinder and associated additional cylinder.

The basis of the present invention based on a decision of a problem of such devices puller crank, which would eliminate the need for breakdown grips with removable node is ri the development of large efforts and would increase the compression legs of the crank, increase productivity and reduce costs.

According to the invention this problem is solved due to the fact that the device puller crank mechanism of the power circuit of the legs is equipped with a cylindrical discs & side plates, and a second shoulder, two shoulders of the lever is made conical with emphasis on the lateral surface mounted on the side beam of a cylindrical disk with a center which is articulated through the paired plates are fixed specified two shoulders lever, whose shoulders are made at an obtuse angle to each other, and the hinge on the lever is made in the beginning of the second shoulder on the line the inner surface of the first lever arm, and a cylinder made unilateral action.

The applicant is not aware of any technical solution that is identical to the claimed device. In this regard, we can conclude according to the invention, the criterion of "novelty".

Implementation differences invention leads to the achievement of a fundamentally new properties object. Introduction to the workings of the power circuit paws with a cylindrical disks and paired fins, the execution of the shoulders at an obtuse angle at the two shoulders of the levers, the execution of the hydraulic cylinder unilateral action provides increased productivity and reduced costs. This ostreae the need to re-install the device with the disruption of the hooks with removable parts.

These circumstances cause, in our opinion, conform to the technical solution of the criterion of "Inventive step".

Implementation of the claimed device is as follows.

Example.

The invention will be understood from the following description of the invention and the accompanying drawings, where:

figure 1 shows a General view of the device;

figure 2 illustrates the kind of legs with a cylindrical disk.

In the description and in the drawings are given the following notation:

1 - traverse 2 - telescopic hydraulic cylinder, 3 - thrust rod, 4 and 5 - duplacey levers, 6 - shoulder, 7 - crank (detail), 8 and 9 of the cylindrical discs, 10 - twin plate 11 to the second arm of the lever 12 to the hinge lever 13 - fitting cylinder 14 to the crank shaft.

The crank puller contains traverse 1 (1), attached to it the power mechanism in the form of a telescopic type single-acting hydraulic cylinder 2 with the thrust rod 3 with the possibility of screwing up (and possibly rigid attachment of the cylinder to traverse). This is achieved through the screw holes in the cross beam 1 and the threaded shirts on the cylinder 2. The puller includes a mechanism of the power circuit of the legs (figure 1) in the form of two shoulders of the levers 4 and 5, each one of the shoulders 6 which is intended to interact with the crank 7 and is provided with the cylinder is practical disks 8 and 9 on the side of the bar 1, with the centre of which is articulated through dual (top and bottom of the disk 8 and the lever 4), the plate 10 is fixed to the lever 4 (and 5 respectively), the shoulders 6 and 11 which are made at an obtuse angle "a"equal to 135 degrees plus or minus 2-3 degrees to each other. When the hinge 12 (figure 1 and figure 2) on the lever 4 is performed at the beginning of the second shoulder 11 and the line "a-a" of the inner surface of the first shoulder 6 of the lever 4, and a second shoulder 11 provided with a tapered and with emphasis on the lateral surface of the cylindrical disc 8 (figure 1 and figure 2), thereby turning the two shoulders of the lever 4 around the hinge 12, increasing the compression of the legs in the form of two shoulders of the levers 4 and 5 of the crank 7 when the oil flow through the nozzle 13 with the nipple in the cylinder 2 (the arrows above the crank 7 figure 1 shows the direction of movement of the ends paws directed to the shaft 14).

To telescopic type hydraulic cylinder 2 is connected through the fitting 13 hose high pressure oil from the hydraulic pump of the tractor or the station via the valve control. Turning paired plate 10 around a cylindrical disks 8 and 9, having the shoulders 6 of the levers 4 and 5 by the edges of the crank 7. Voracova cylinder 2 in the holder 1, lead thrust his rod 3 is fully inserted in the shaft 14 with the crank 7.

Including a valve controls the oil pressure in the hydraulic cylinder 2, push the thrust shaft 3 (shown in figure 1 by the arrow) until it stops in the shaft 14 of the crank. Gave the further extension of the thrust rod 3 together with the telescopic piston causes displacement of the bar 1 back from the shaft 14, causing the offset shoulder 6 with the crank 7 (arrows). Due to the displacement of the bar 1 to the housing of the hydraulic cylinder 2 and the cylindrical disks 8 and 9 through the paired plate 10 is moved duplacey levers 4 and 5 together with the crank 7, pulling the latter from the shaft 14, this can develop a hydraulic pressure to 50 MPa. This is achieved due to the conditions of the shoulders 6 and 11 at an angle of 135 degrees, and also because of the equality of the radius of the cylindrical disks 8 and 9 equal to the length of the coupled plate 10, it allows you to capture different width cranks (not the same type). Order puller did not fall into the pickup crank 7 from the shaft 14, it can be equipped with eye bolts on traverse 1 with a safety rope at the last. After removal of the crank 7, by controlling the valve, discharge oil from the hydraulic cylinder 2 unilateral action under the action of its springs, which leads cylinder 2 unilateral action in its original position.

This embodiment of the puller crank allows you to increase productivity and to reduce the cost of operations.

The crank puller containing yoke fixed on the lift mechanism made in the form of a telescopic type hydraulic cylinders with hard rod for crank shaft, the mechanism of the force-closure of paws in the form of two shoulders arms, one leg of which is destined is aceno to communicate with the crank, characterized in that the mechanism of the power circuit of the legs is equipped with a cylindrical discs & side plates, and a second shoulder, two shoulders of the lever is made conical with emphasis on the lateral surface mounted on the side beam of a cylindrical disk with a center which is articulated through the paired plates are fixed specified two shoulders lever, whose shoulders are made at an obtuse angle to each other, and the hinge on the lever is made in the beginning of the second shoulder on the line the inner surface of the first lever arm, and a cylinder made unilateral action.



 

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