RU2042064C1 - Method of forming flexible-friction members for rope vibration insulators - Google Patents

Abstract

FIELD: mechanical engineering. SUBSTANCE: method includes fixing bushings to a mandrel with a given step along the contour of the member, winding the rope on bushings to define loops consisting of arc-like parts which embrace bushings from the diametrically opposite side of them and straight crossed parts of the rope interposed between the bushings, and removing the bushings with the wound rope from the mandrel. After removing the bushing with the wound rope, the bushings are interposed between the supports so that the tops of the arc-like parts of the rope is in contact with the supports. The bushing are then removed. EFFECT: simplified method. 3 cl, 3 dwg

Description

 The invention relates to mechanical engineering and can be used in the manufacture of elastic friction elements (UVE) for cable vibration isolators.

A known method of forming a UVE for cable vibration isolators, which consists in covering the cable segments in the required form by attaching the cable in the clips of the vibration isolator [1]
The disadvantages of this method are the low reliability of termination of the ends of the cable in the clips, complex assembly technology, low frictional characteristics of the UVE.

The closest to the invention in technical essence and the achieved result is a method of forming UVE for cable vibration isolators by winding a length of cable onto bushings fixed on a mandrel with a predetermined pitch along the UVE loop, for which they sequentially bend the bushings with a cable in planes perpendicular to their axes, with the formation of loops consisting of arched sections of the cable, enveloping the bushings from their diametrically opposite sides, and rectilinear crossing sections of the cable located between the bushings, with the subsequent removal of the bushings with a cable wound on them from the mandrel [2]
At the same time, maintaining the shape of the UVE ensures by fixing the relative position of the arcuate and rectilinear crossing sections of the cable with bushings on which the cable is wound.

 The disadvantage of this method is the low quality of the UVE due to the small range of ultimate strains limited by the bushings, and also because of the low frictional properties of the UVE, due to the small work of the friction forces between the rectilinear crossing sections of the cable.

 The aim of the invention is to improve the quality of UVE by increasing the range of ultimate deformations and increasing frictional properties.

 This is achieved by the fact that after removing from the mandrel the bushings with a cable wound around them are enclosed between supports, one of which is designed to communicate with a vibrating object and the other with a vibration-insulated object, provided that the vertices of the arcuate sections of the cable come in contact with the surfaces of the supports, the vertices of the arcuate sections are fixed on supports, and bushings are removed.

 In addition, in order to simplify the proposed method, only the vertices of the arcuate sections of the outermost loop loops are fixed on the supports, and in order to simplify the method of forming a UVE of a ring shape, bushings with a cable wound around them are enclosed between coaxially located supports without subsequently fixing the vertices of the arcuate sections of the cable on the supports.

 In FIG. 1 and FIG. 2 schematically depicts a flat-shaped UVE, a longitudinal section formed by the proposed method; in FIG. 3 UVE ring shape.

 UVE is formed by pre-winding a piece of cable onto bushings fixed on a mandrel (not shown) with a given step along the UVE contour, for which they sequentially bend the bushings in the planes perpendicular to their axes, with the formation of loops consisting of arcuate sections of 1 cable enveloping the bushings from their diametrically opposite sides, and rectilinear crossing sections of 2 cables located between the bushings, followed by removal of the bushings with a cable wound on them from the mandrel.

 After removal from the mandrel, the bushings with a cable wound around them are enclosed between supports 3 and 4, one of which is designed to communicate with a vibrating object and the other with a vibration-insulated object, the vertices of the arcuate sections of the cable 1 are fixed on supports 3 and 4 in any way (using clamps, due to wire stitching, etc.), after which the bushings are removed. Moreover, for the UVE having a closed loop, the supports 3 and 4 will also have a closed shape, and the removal of the sleeves can be carried out without prior attachment of the vertices of the arcuate sections 1 of the cable to the supports. In all cases, after removal of the bushings, the relative position of the arcuate sections 1 and the rectilinear intersecting sections 2 of the cable is preserved, and hence the shape of the UVE given to it during the winding of the cable onto the bushings.

 Flat UVE (Fig. 1) retains its shape due to the fact that after removal of the sleeve from the mandrel, the bushes with a cable wound around them are enclosed between the flat supports 3 and 4, and the vertices of the arcuate sections 1 of the cable are fixed on the surface of the supports (fixing points of 5 vertices of the arcuate sections the cables on the supports in Fig. 1 and 2 are conventionally shown by shaded circles). The subsequent strangulation of the bushings does not lead to a violation of the shape of the UVE, since the elastic forces accumulated in the cable during its winding onto the bushings and tending to violate the shape of the UVE turn out to be closed on supports connected with the UVE.

 Flat UVE (Fig. 2) is fixed on the surfaces of supports 3 and 4 only by the vertices of the arcuate sections of the extreme loops 6. In this case, the elastic forces accumulated in the cable during its winding onto the sleeves, after removing the sleeves, are closed to the supports and extreme loops connected to the supports 5 UVE.

 The ring UVE (Fig. 3) retains its shape only due to its conclusion between coaxially located supports 3 and 4 without subsequent fixing of the vertices of the arcuate sections of the cable to the supports. The elastic forces accumulated in the cable during its winding onto the bushings and striving to disrupt the UVE shape after removal of the bushings turn out to be closed on coaxially located supports.

 The effectiveness of the proposed method is determined by improving the quality of UVE by increasing the range of ultimate strains, not limited to the bushings onto which the cable is wound, as well as increasing frictional properties by increasing the work of friction forces between rectilinear crossing sections of the cable by increasing the path of their mutual slippage for all types of deformation UVE.

Claims (3)

 1. METHOD FOR FORMING ELASTIC FRICTION ELEMENTS FOR ROPE VIBRATION ISOLATORS, in which the bushings are fixed on the mandrel with a given step along the contour of the elastic-friction element, a piece of cable is wound on the bush, sequentially bending them around in planes perpendicular to the axes of the bushings, from loops forming envelope sleeves from their diametrically opposite sides, and rectilinear crossing sections of the cable located between the sleeves, followed by removal of the sleeves with a cable wound on them from the mandrel, characterized in that after removal from the mandrel, the bushings with the cable wound on them are enclosed between the supports so that the vertices of the arcuate sections of the cable come into contact with the supports, and then the bushings are removed.  2. The method according to claim 1, characterized in that the extreme loops of the arcuate sections of the cable are fixed to the supports at the points of contact of their vertices with the supports.  3. The method according to claim 1, characterized in that all the arcuate sections of the cable are fixed to the supports at the contact points of their peaks with the supports.

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