RU2553622C2 - Dust and water-proof hinge - Google Patents

Abstract

FIELD: machine building.

SUBSTANCE: invention refers to machine building, particularly, to dust- and water-proof hinges. A dust- and water-proof hinge comprises poles, a lever, a lever head, an axis as well as resilient conical bushes set between the lever head and the axis. Bearings are installed between the head and the axis in the space between the resilient conical bushes and are separated from them by spacing plates. The resilient conical bushes are set between the spacing plate and the poles behind which packing nuts are mounted on the axis.

EFFECT: higher reliability of hinge.

1 dwg

Description

The invention relates to the field of engineering and can be used in the mining, metallurgical, construction industries to ensure reliable and durable operation of equipment (crushers, screens, transition devices, etc.) operated in open areas under the influence of extreme weather conditions, as well as in high dust conditions with the possibility of using a layer of abrasive material, while the hinge must provide, in the process of swinging the lever under load, a constant price position pa head pivot about the hinge axis.

In the automotive industry, the pendulum lever hinge is widely known, in which the lever is mounted on an axis that rotates in bearings (bushings) located in the housing. The bushings are protected from dust, dirt and moisture by plastic o-rings [1, p. 156, 157]. Such a joint works satisfactorily in closed spaces, but is unsuitable for use in extreme weather conditions in open areas, in dusty conditions, especially under a layer of finely dispersed abrasive material, which, in the places where the sleeves come in contact with the housing where there is mutual sliding, quickly wipes the bushings and the housing , which leads to depressurization of the hinge and its failure.

Closest to the invention in technical essence and the achieved result is a hinge having a housing in which the lever head is mounted on the hinge axis, which is a bolt for fastening to the body of the lower longitudinal rod, on elastic rubber bushings [1, p.146, 147].

The disadvantage of this hinge is the lack of rigidity under load. With an increase in the force falling on the hinge rod (lever), the center of the hinge head shifts in the direction of the acting force due to the deformation of the elastic rubber bushings, which is unacceptable for mechanisms that need constant kinematics of the links, for example, jaw crushers. In addition, the hinge cannot, with small limited dimensions, ensure operation under a load of several hundred kN.

The objective of the invention is the creation of a reliable, rarely requiring maintenance, working in high dust conditions, under a layer of abrasive material and under the influence of extreme weather conditions, a hinge that can withstand loads of several hundred kN (up to 90-100 kN) and at the same time ensure the position of the centers heads and axles.

The essence of the invention lies in the fact that in a hinge containing a lever (rod), a lever head, an axis, an attachment bracket (rack), elastic rubber bushings located between the lever head and an axis on which according to the invention, rolling bearings are installed between the elastic rubber bushings ( or sliding), separated from the elastic rubber bushings by distance washers, and each rubber sleeve is installed between the distance washer and the housing, behind which the pressure nut is located.

The difference of the proposed hinge from the known one is that in the hinge containing the lever, lever head, axis, struts (mounting bracket), elastic rubber bushings are located between the lever head and axis. On the axis, between the elastic rubber bushings, rolling bearings (or sliding) are installed, separated from the elastic rubber bushings by distance washers, and each elastic rubber sleeve is installed between the distance washer and the stand, behind which the pressure nut is located.

The technical result obtained from the use of the invention lies in the fact that the hinge provides, for a given load capacity, an unchanged position of the axes of the hinge head and its axis, thereby guaranteeing the given kinematics of the machine and, for example, for crushers, more stable sizes of pieces of manufactured products can work for a long time open areas under a layer of abrasive material in extreme weather conditions, with occasional maintenance (lubricant supply).

The drawing shows a longitudinal section of a dustproof hinge.

The hinge consists of a lever 1 of the hinge (rod), ending with the head 2 of the lever, inside which on the axis 3 are mounted radial bearings 4 (rolling or sliding), closed in the head 2 of the hinge, on the outside with elastic conical bushings 5 of oil-resistant rubber, between the elastic conical bushings 5 and spacers 4 mounted spacer washers 6, the hinge axis 3 is located in the struts 7, which are attached to the base of the housing 8 (frame, frame, housing, etc.), the entire hinge mechanism on the struts 7 is fixed with pressure nuts 9, at the ends of the axis 3 installed " Khodnev "10 and" output "11 nipples, closed with rubber caps.

The hinge works as follows. Previously, without fixing the strut 7 to the base 8 of the housing, the hinge lever 1 is set in the middle position of its trajectory and the pressure nut 9 is tightened until, when the lever 1 is swinging, the elastic conical bushings 5 stop slipping in extreme positions (± 15-20 ° from extreme position) along the head of the hinge 2 and along the axis 3, after which the posts 7 are attached, together with the entire hinge, to the base 8. The hinge is included in the kinematic chain of the machine, where it under load makes swinging movements of the lever 1 in the range of no higher than 30-35 °. Bearings 4, designed for the maximum possible load on the hinge, provide a constant path of the lever 1 of the hinge and, therefore, the entire kinematic chain of the machine. The elastic conical bushings 5 tightly close the inner cavity of the hinge, guaranteed to seal it and protect it from dust and water. Since slipping of elastic conical bushings along the head of the hinge 2 and axis 3 is excluded, abrasive particles falling into the interface between the elastic conical bushings and the metal do not wear out the parts of the hinge or the bushings themselves. Due to the tight fit of the elastic conical bushings in the head of the hinge 2 and on the axis 3, the hinge can work under water at a depth of 5-7 meters and, accordingly, in any extreme weather conditions. The spacer washers 6 separate the bearings 4 from the elastic conical bushes 5, not allowing the latter to touch the separators and wear out, and also serve as a reliable stop for the bushes, ensuring that they are pressed firmly against the hinge head 2 and axis 3. The lubricator 10 has a valve that passes grease into the hinge, and the oiler 11 has a valve that allows the lubricant, under some pressure, to go out. Both grease fittings are covered with tight rubber caps.

Thus, all the tasks are achieved.

Information sources

1. Cars VAZ: design and maintenance. Ershov B.V., Yurchenko M.N. - 7th ed., Revised. and add. - Kiev: Visha school. Head publishing house, 1982. - 177 p.

Claims (1)

A dustproof hinge containing racks, a lever, a lever head, an axis, elastic conical bushings located between the lever head and the axis, characterized in that between the head and the axis, in the space between the elastic conical bushings, bearings are mounted separated from them by spacers, this elastic conical bushings are located between the spacer washer and uprights, behind which the axle nuts are installed.