RU2010694C1 - Mechanical puller - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: part 10 is dismounted by bringing grips 2 in contact with it and rotating power screw 3. In the course of power screw rotation its axial position relative to shaft 11 is maintained by bushing 7 and axial bearing 5. Part 10 moves along shaft 11, shifts bushing 7 relative to axial bearing 5, further on it moves upon axial bearing 5 thus providing for stable axial position of power screw 3 until part 10 is completely pulled off. EFFECT: more convenient operation and enlarged functional capabilities. 2 cl, 3 dwg

Description

 The invention relates to tools for disassembling interference fit, in particular for extrusion of shaft-sleeve connections.

 Known mechanical puller containing a housing with grips and located in it a power screw [1].

 Closest to the invention in technical essence is a mechanical puller, comprising a housing with grips mounted on it and a threaded hole, located in the last power screw with a stop element at the end and a centering sleeve connected to the stop element [2].

 A disadvantage of the known puller is the inconvenience of its operation and limited operational capabilities.

 The purpose of the invention is improving convenience and expanding operational capabilities.

 This is achieved by the fact that in a mechanical puller containing a housing with grippers mounted on it and a threaded hole, a power screw located in the latter with a stop element at the end and a centering sleeve connected to the stop element, the latter is mounted on the stop element with the ability to move along it, the puller equipped with an additional centering sleeve mounted on the main one with the possibility of movement along it, and each centering sleeve has an annular flange on the inner surface on one end.

 In FIG. 1 shows the proposed puller, General view; in FIG. 2 - the position of the bushings when removing parts from shafts of various diameters; in FIG. 3 - position of the bushings when dismantling parts from hollow shafts.

 The mechanical puller comprises a housing 1, grips 2 pivotally mounted on the housing 1, a power screw 3 mounted in a threaded hole of the housing 1. At the end of the power screw 3, a thrust element in the form of a thrust bearing 5 is fixed by means of a retaining ring 4, interacting with the power screw 3 through a ball a support 6. On the thrust bearing 5, bushings 7 and 8 are mounted movably conjugated between themselves and the thrust bearing 5. The bushings 7 and 8 have ring beads 9 at one end on the inner side.

 The puller works as follows.

 To remove the part 10 from the shaft 11, the sleeve 7, the inner diameter of which corresponds to the diameter of the end of the shaft 11, is mounted on the free end of the shaft 11. In this case, the thrust bearing 5, being in the sleeve 7, abuts against the end of the shaft 11 and creates a support base for the power screw 3. Entering the grippers 2 in contact with the part 10 and rotating the power screw 3, the parts 10 are dismantled. In this case, the sleeve 7 and the thrust bearing 5 provide the axial position of the power screw 3 with respect to the shaft 11. The part 10, moving along the shaft 11, displaces the sleeve 7 relative to thrust bearing and later itself slides on the thrust bearing 5, which ensures a stable axial position of the power screw 3 until the removal of the part 10.

 When dismantling parts from shafts of various diameters, a group of centering sleeves is used. The principle of operation of the puller in this case is shown in FIG. 2. The axial position of the screw 3 is provided by the thrust bearing 5 and the bushings 7 and 8.

 When dismantling the part 10 from the hollow shaft 11 (Fig. 3), the centering sleeve 7, the outer diameter of which corresponds to the diameter of the end of the shaft 11, is installed by an annular bead 9 to the end 11. The sleeve 8, pulled over the free end of the shaft 11, fixes the position of the sleeve in the radial direction 7 with a thrust bearing 5 relative to the axis of the shaft 11. During rotation of the screw 3, the force through the thrust bearing 5 and the annular flange of the sleeve 7 is transmitted to the end of the shaft 11. The process of removing the part is similar to that described. (56) 1. USSR Copyright Certificate N 861057, cl. B 25 B 27/92, 1981.

 2. USSR author's certificate N 1511104, cl. B 25 B 27/06, 1987.

Claims (3)

 1. MECHANICAL REMOVER, comprising a housing with grippers mounted thereon and a threaded hole, a power screw located in the latter with a stop element at the end and a centering sleeve connected to the stop element, characterized in that, in order to increase convenience, the centering sleeve is mounted on the stop element with the ability to move along it.  2. The puller according to claim 1, characterized in that, in order to expand operational capabilities, it is equipped with an additional centering sleeve mounted on the main sleeve with the ability to move along it.  3. The puller according to paragraphs. 1 and 2, characterized in that each centering sleeve has at one end an annular flange on the inner surface.

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