DE8419835U1 - Spherical bearings - Google Patents

Description

IS. - June 1984

Walter Hunger
Wurzburg

Spherical bearings

The present innovation relates to a spherical plain bearing with a spherical piece seated in an outer body. Such spherical bearings are used to connect rod ends and journals allowing pendulum movements, wherein the pin protrudes through a bore in the ball piece and the outer body protrudes into the eye of the rod end is mounted. Because of the spherical outer surface of the ball piece, it can oscillate in the outer body carry out.

The innovation is based on a spherical plain bearing in which the outer body surrounding the ball piece consists of a on the ball piece with a concave-spherical inner surface adjacent intermediate ring made of elastically deformable Plastic and a metallic support ring surrounding the cylindrical outer surface of the intermediate ring Such a training is known from CH-PS 322 392

In this known design, the support ring and the intermediate ring are connected to one another in that the Band of the support ring is flanged radially inward

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And the lips formed in this way prevent axial movements of the intermediate ring with respect to the support ring. the Production of this spherical plain bearing is therefore complex, and the spherical plain bearing itself must be correspondingly expensive.

The object of the present innovation is to create a spherical plain bearing that is easier to manufacture and therefore cheaper of the generic type. It is a novelty to show how the metallic support ring and the plastic intermediate ring in a simple manner and also with regard to the stresses that occur in spherical plain bearings can be reliably connected to each other.

The solution to the problem is achieved according to the innovation that in the mutually facing surfaces of the intermediate ring and the support ring opposing circumferential grooves are incorporated, and in the thereby formed Annular spaces a curable plastic compound is injected as a locking spring.

Appropriately are near the edges of the for Ball piece facing inner surface of the intermediate ring in Omfangsrichtung circumferential grooves worked out in their each a round cord (5) is inserted.

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A reinforcement of the spherical bearing results when in the surface of the intermediate ring facing the support ring a metallic wire mesh is inserted.

Finally, it is useful if a side groove is worked out in each of the side surfaces of the intermediate ring and the resulting radially inner lip is curved more inwardly before the assembly of the spherical plain bearing than corresponds to the rest of the concave-spherical inner surface, so that it is reinforced after assembly presses against the ball piece.

The joint bearing according to the innovation is easy to manufacture and highly resilient with a complete load-bearing surface.

The innovation is explained below by the description an exemplary embodiment further explained with reference to the accompanying drawing. This shows a novelty Spherical plain bearings in an axial section.

The spherical plain bearing consists of an outer body 1, which a ball piece 2 includes. The spherical surfaces facing each other allow pendulum movements of the ball piece in the outer body.

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The outer body 1 consists of an intermediate ring 3 with The spherical inner surface facing the ball piece and a cylindrical surface on which a metallic Sttitz ring 4 is pushed. The intermediate ring "consists made of an elastically deformable plastic, in particular a polyamide, which is glass fiber reinforced and / or be carbon fiber reinforced and / or PTFE reinforced can.

In the vicinity of the edges of the spherical inner surface of the intermediate ring, a circumferential groove is provided in each case a round cord 5 or an O-ring is inserted, which fulfill a sealing function by preventing both the leakage of lubricant and the ingress of Prevent foreign bodies. For the latter purpose, wiper rings (not shown) can also be provided.

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In the surface of the intermediate ring 3 facing the support ring 4, a wire mesh 6 is inserted. This will be beneficial embedded in the manufacture of the intermediate ring, so that its wires are in the manner of a carcass are surrounded on all sides by the material of the intermediate ring. Bs prevents when the operating loads occur a flow of the intermediate ring material.

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To prevent relative axial displacement between the intermediate ring 3 and the support ring 4 are in the facing cylindrical surfaces of intermediate ring 3 and support ring 4 circumferential hats opposite one another worked out, and in the resulting annular spaces is a hardenable plastic compound, z. B. a two-component adhesive injected, which acts as a locking spring 8 after it has hardened. Injecting the locking spring material takes place through radial bores 9 in the body of the support ring 4.

A special embodiment of the furnace is that in the side surface of the intermediate ring 3 each have a side groove 10 is provided, the resulting radially inner lips in the untensioned state, that is, before the assembly of the spherical plain bearings, they are more curved inwards than the rest of the concave-spherical ones Corresponds to the curvature of the central area of the inner surface. f

Intermediate ring amplified in the finished joint bearing against the ball portion 2 press can thereby a _^off;; In such a configuration, the inner lips of the "be. Touching points and sealing take over and, optionally, make the arrangement of round cords 5 dispensable.

To assemble the joint bearing is known per se |) ter V / eise del * Intermediate ring 3 by pressing on the opposite]

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opposite circumferential locations, so that the ball portion 2 can oval deformed be used if its plane is rotated 90 ° relative to the plane of the intermediate ring, Mach insertion is removed, the pressure on the intermediate ring so that it returns to its round shape, after which the Ball piece can be rotated in the plane of the intermediate ring. Now the unit of ball piece and intermediate ring can be pushed into the metallic support ring 4 and fixed according to the new.

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Claims (4)

PB on June 18, 1984 Walter Hunger Würzburg ι spherical bearings SCHTJTZANSPRtfCHE 1. Joint bearing with a ball piece (2) and one of these enclosing outer body (1) made of a bearing on the ball piece (2) with a concave-spherical inner surface Intermediate ring (5) made of elastically deformable plastic and a cylindrical outer surface of the intermediate ring comprehensive metallic support ring (4), characterized in that in the mutually facing surfaces of the intermediate ring (5) and the support ring (4) each other opposing circumferential grooves are incorporated and in the annular spaces formed thereby a hardenable Plastic compound is injected as a locking spring (8). 2. spherical plain bearing according to claim 1, characterized in that in the vicinity of the edges of the inner surface of the intermediate ring facing the ball piece (2) Circumferential grooves worked out in the circumferential direction and a round cord (5) is inserted into each of these. ic * · eft * r «· 3. Joint bearing according to one of claims 1 or 2, characterized in that in the surface of the intermediate ring (3) facing the support ring (2) a metallic Wire mesh (6) is inserted. 4. G-pivot bearing according to one of the preceding claims, characterized in that a side groove (10) is machined in the side surface of the intermediate ring (3) is, and the resulting radially inner lip before assembling the G-pivot bearing more inward is arched than corresponds to the rest of the concave-spherical inner surface, so that it is reinforced after assembly presses against the ball piece (2). II