CS262005B1 - Pneumatic spring - Google Patents

Abstract

The pneumatic spring β is an elastic bellows of at least approximately constant wall thickness, which is circumferentially clamped at the end between the inner plug and the outer flange and the piston, has a collar on the plug for supporting the flange or piston. The collar may have, for example, a cylindrical circumference or a conical circumference.

Description

The invention relates to a pneumatic spring having an elastic bellows of at least approximately a constant wall thickness, which at the end is circumferentially clamped by an inner plug and an outer flange or piston.

There is known a pneumatic spring with an elastic bellows of at least approximately a constant wall thickness, which at the end is circumferentially clamped by an inner plug and an outer flange or piston. A disadvantage is that the bellows, which bends over the flange or piston due to the axial deformation of the spring and the internal air overpressure, exerts a force which can cause their axial displacement over the outer surface of the bellows and consequently disintegration and sudden loss of joint tightness. Immediate leakage of air from the spring can damage not only the surrounding equipment but also the health of bystanders

The essence of an air spring having an elastic bellows of at least approximately a constant wall thickness which is circumferentially clamped between an inner plug and an outer flange or piston according to the invention is that the plug has a collar to support the face of the flange or piston. The collar may have a cylindrical or conical circumference.

The main advantage of the pneumatic spring according to the invention is that the stopper collar, which may have a cylindrical or conical circumference, allows support of the face of the flange or piston, thereby preventing their axial displacement over the outer surface of the bellows. It does not allow disintegration and sudden loss of tightness associated with immediate and dangerous escape of compressed air from the spring.

The accompanying drawing shows, in partial sections, exemplary embodiments of a pneumatic spring according to the invention.

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Fig. 1 is a partial cross-sectional view of an elastic bellows air spring of approximately constant wall thickness having an outer flange and an outer piston at the ends for circumferentially clamping the inner plugs with cylindrical flanges. FIGS. 2 and 3 show details of the ends of a pneumatic spring with another possible embodiment of a cylindrical flange. Figures 4 and 5 show details of the ends of a conical-flange pneumatic spring.

The pneumatic spring of FIG. 1 has an elastic bellows 7 made of rubber reinforced cords. At both ends it has internal plugs 6 with collars 3 having a cylindrical periphery 4. At the upper end, the bellows 1 has an outer flange 5 for circumferential grip, at the lower end it has an outer piston 6. The collar 3 of the upper plug 2 forms the abutment for the face of the flange 5, the collar 3 of the lower plug 2 forms the abutment for the face of the piston 6.

The upper end of the air spring according to FIG. 2 differs in that the cylindrical circumference 4 of the collar 3 is stepped. There is a gap 7 in the shoulder, which facilitates disassembly.

The upper end of the air spring according to FIG. 3 differs in that the collar 3 of the inner plug 2 is formed by an insert ring 8

The upper end of the pneumatic spring of FIG. 4, in which the bellows 1, the upper inner plug 2 and the outer flange 5, has a collar 3 with a tapered circumference 9 to support the tapered outer face at the back 5.

The upper end of the air spring of FIG. 5 with the bellows 1 has an inner plug 2 with a collar 3 having a conical circumference 9. The collar 3 forms a support for the face of the outer flange 5.

In all cases, the bellows 1 is bent through the outer flange 5 or through the outer piston 6 due to axial deformation of the spring and the internal air overpressure and is subjected to an axial compressive force. The unwanted movement of the outer flange 5 and the outer piston 6 is prevented by the collar 3 of the inner plug 2 on which their faces rest.

Claims (3)

OBJECT OF THE INVENTION 262 005 A pneumatic spring having an elastic bellows of at least approximately a constant wall thickness which is circumferentially clamped between an inner plug and an outer flange or piston at the end, characterized in that the plug (2) has a collar (3) for supporting the face of the flange (5). or piston / 6 /. Pneumatic spring according to claim 1, characterized in that the collar (3) has a cylindrical periphery (4). Pneumatic spring according to claim 1, characterized in that the collar (3) has a conical circumference (9).