SU647096A1 - Device for pressing-out bearings from housings - Google Patents

Description

one

The invention relates to the field of mechanical assembly work, in particular, to the dismantling of press joints, for example, in the repair of roller bearings on rolling bearings, mainly large ones.

Various devices are known for dismounting bearings from a housing, for example, as a screw press and as a hydraulic press l.

The disadvantage of mechanical presses is a low pressing force, as a result of which they can be used for bearings with a diameter of not more than 180-200 mm.

Hydraulic presses give a lot of effort, however, the time for disassembly is increased due to the large number of preparatory (auxiliary) operations for installing and removing the bearing housing from the press

A device is known for pressing out bearings from housings, for example, from roll bearings of rolling mills, comprising a traverse and a power cylinder fixed thereto, as well as a hinge clamps with jaws 2 fixed on the traverse.

However, the dismantling of bearings, especially with a diameter of 1000 mm and above, from

The roll supports with this device are difficult, since it is difficult to ensure perpendicularity of the pressing force to the bearing support plane, and a slight misalignment leads to jamming of the outer ring of the bearing in the housing.

The purpose of the present invention is to improve the quality of the extrusion by eliminating possible distortions in the rectification, and, therefore, jamming of the bearing in the housing.

This goal is achieved by

5 that the device is equipped with a stand with a guide sleeve, and the power cylinder is installed in this sleeve, and also mounted on the rack symmetrically relative to the axis of the power

0 cylinders with additional lifting cylinders connected to the cross-bar, with each grip equipped with an individual power drive mounted on the cross-bar and the axis of rotation

5 grippers are offset relative to the plane of the clamping jaws in the direction of the axis of the power cylinder.

Claims (2)

FIG. 1 of the attached drawing shows a general view of the device; on .fig. 2 - the same, top view; in fig. 3 section lio bb, the position of extrusion; Fig, 4 - installation of the grippers in the working position and extrusion of the bearing set. The device has a column 1 (Fig. In the guide bush which is located in the depressing power cylinder 2) The depressing cylinder 2 is connected to the jaw 4j at an angle 120 through the yoke 3. Each gripper 4 has an individual actuator 5 for turning, for example, a hydraulic cylinder. The traverse 3, together with the power cylinder and the grippers 4, is moved in the vertical direction with the help of two additional hydraulic lifting cylinders 6. The working position of the grips 4 is fixed by the stops 7 (FIG. Rotation axis 8 of the grips 4 are displaced and the value 6, relative to the plane of the clamping jaws 9 of the claws to the axis of the cylinder of the extrusion 2. On the supporting plane of the stand 1 is installed a roll support (conventionally shown in the drawing with thin lines) consisting of the housing 10, in which the four-quarter rolling bearing 11 and The technological mandrel 12 is installed in advance. The device operates as follows: In the initial position of all mechanisms of the device, the support of the roll is mounted on the supporting planes of the stand 1 so that the axial Cylinder 2 and the bearing 11 coincide. For the purpose of universality of the device, as well as transmission of the pressing out force, evenly, around the perimeter of the outer ring of the bearing 11, lift cylinders 6, traverse 3, together with the grippers 4, rises so that the pressing jaws 9 of the grippers 4 are slightly higher than the upper end of the body 10 of the roll support . Drives 5 grippers 4 are reduced to stops 7. Traverse 3 is lowered until the pressing jaws 9 of the grippers 4 contact the roll support body 10. Since the grab lines cannot be absolutely identical, for example, due to errors in length and installation, stops 7, the upper end of the body 10 is not touched with all the clamping jaws 9 of the grips 4. Therefore, in the rod cavities of the arrays 5 they give pressure and the grippers are diluted in the opposite directions, and as their axes 8 are displaced, the roll support is pressed by all the grippers 4. Pressure is applied to the piston cavity of the power cylinder 2 and the bearing 11 is pressed in with the technological mandrel 12 from the support body 10. During the extrusion, the rod spaces of the lifting cylinders 6 and the actuators 5 are under pressure and, therefore, the roll support body is reliably pressed against the support plane of the stand 1. Thus, the pressing force is always perpendicular to the end plane of the bearing and, therefore, the possibility of skewing and jamming The proposed device makes it possible to shorten the inspection and repair time of the roll mill rolls by about 1.5 times, increase the service life of the bearing supports and, consequently, increase the productivity of rolling mills. The invention of the device for pressing out bearings from housings, for example, from the supports of rolling mill rolls, containing a traverse and a power cylinder fixed to it, as well as hinges with clamping jaws fixed on the traverse, which, in order to increase the quality of the extrusion by eliminating skew and seizure of the bearing and performance, it is equipped with a stand with a guide sleeve, and the power cylinder is installed in this sleeve and also mounted on the rack symmetrically with respect to the axis s ovogo cylinder drpelnitelnymi -podema cylinder, coupled with a crosspiece, wherein each gripper is provided with an individual actuator mounted on the boom, and the grippers pivot axis offset relative to the plane of the pressing jaw in the direction of the actuator axis. Sources of information taken into account in the examination 1. A single manual for operation, revision and assembly of the supports of the rolls of rolling mills on rolling bearings, M., Metallurgists, 65, pp. 132-133. 2. Rabiner E.G., Installation and operation of bearing units, M., Mashgiz, 60, p. 172-173. 9 - i dlUi:: - - 9g.Z fue. g Viji.it