GB2083163A

GB2083163A - A pin cushioned in a body, for example a body of a track for a tracked vehicle

Info

Publication number: GB2083163A
Application number: GB8123674A
Authority: GB
Original assignee: Diehl GmbH and Co
Current assignee: Diehl Verwaltungs Stiftung
Priority date: 1980-09-03
Filing date: 1981-08-03
Publication date: 1982-03-17
Also published as: GB2083163B; DK287081A; SE8104992L; AR231422A1; DK152943C; FR2489233B1; JPS5747261A; ATA293781A; IL63564A0; DE3033086C2; NO812179L; DK152943B; CA1154055A; BE889279A; CH653300A5; AT384406B; NL8102954A; DE3033086A1; FR2489233A1

Abstract

There is described a rubber- cushioned pin (15) for a tracked-vehicle track, said pin having rubber rings (20 - 23) vulcanised thereon and being pressed into a bore (36), provided for the pin, of a track body (1), the stability of said pin (15) being increased in that the rubber rings (20 - 23) are adhered by way of an adhesive coating (26) to the wall of the bore. Instead of hitherto- used tube body material, namely steel, and hitherto-used rubber rings, other material pairings having lower friction values than previously, such as plastics materials, fibre-reinforced plastic materials, and non-ferrous metals, can be used for the track bodies, and other elastomeric materials instead of hitherto- used rubber can be used for the rings. The invention is also applicable to an arrangement, having a pin cushioned in a bore by elastomeric material, in which the bore is in a body other than a body of a tracked-vehicle track. <IMAGE>

Description

SPECIFICATION A pin cushioned in a body, for example a body of a track for a tracked vehicle This invention relates to a pin cushioned in a body, for example a body of a track for a tracked vehicle.

There is described herein a rubber-cushioned pin for a track of a tracked vehicle, said pin having rubber rings which are vulcanised on, and said pin being pressed into a bore, providedforthe pin, of a track body.

In the case of rubber-cushioned tracks of tracked vehicles, a pin with rubber rings vulcanised on can be pressed into a bore of a track body. Circulation of the track on the running gear leads to a twisting of the pin relative to the body provided with the bore.

The twist paths bring about a deformation of the rubber rings in the form of a torsion stress. By frictional locking between the rubber rings and the wall of the body bore, a slipping of the rubber rings is prevented, see on this score the track in accordance with the double joint-pin type in accordance with German Gebrauchsmuster No: 1905877.

In the case of a track in accordance with the single joint-pin type in accordance with German Offenlegungsschrift No: 27 55 412, upon the circulation of the track art a guide wheel of the running gear there exists an angle of rotation which is twice as large as in the case of a track in accordance with the double joint-pin type. In this way, the frictional connection, present up to a certain angle of rotation, between rubber rings, provided with bias, and the wall of the body bore is cancelled and there ensues a slipping of the rubber rings. As a disadvantage there arises a rapid wear of the rubber rings through excessive frictional heat and frictional wear with rising destruction of the rubber structure.The unprotected pin then begins in the bore to rub initially against the bore edges of the body (steel on steel), which finally leads to the breakage of the pin.

A task of the invention is, in the case of larger angles of twist which are present in the case of tracks in accordance with the single joint-pin type, to prevent any slipping of rubber rings provided with bias. Afurthertask consists in increasing the stability of a pin rubber mounting in the case of tracks of tracked vehicles, even in the case of tracks in accordance with the double joint-pin type.

According to the invention there is provided a pin cushioned in a hole in a body by elastomeric material vulcanised on, or bonded on, said pin, relative twisting movement being able to take place between said pin and said body, characterised in that the elastomeric material is adhered by way of an adhesive coating to the wall of the said hole.

Also, according to the invention, there is provided a rubber-cushioned pin for a track of a tracked vehicle, said pin having rubber rings which are vulcanised on, and said pin being pressed into a bore, provided for the pin, of a track body, characterised in that the rubber rings are adhered by way of an adhesive coating onto the wall of the bore.

Advantageously the result is achieved that a slipproof arrangement of the rubber rings is also achievable when instead of the body material hitherto used, namely steel, and the hitherto-used rubber rings, other material pairings are used, such as plastics materials, fibre-reinforced plastics materials, and non-ferrous metals, for the track bodies, and other elastomeric materials instead of the highertoused rubber are used for the rings. It is therefore of substance that, in arrangements constructed in accordance with the invention, material pairings having lower friction values than previously can be used.

An exemplary embodiment of the invention is shown in the accompanying drawings, in which: Figure 1 shows a tracked-vehicle track, shown in simplified manner, in fragmentary view and constructed in accordance with the single joint-pin principle; Figure 2 shows, on a larger scale, a fragmentary view at location A in Figure 1; and Figure 3 shows the pressing-in of a pin, provided with rubber rings, into the bore of a track body.

Referring to the drawings, shown in Figure 1 are two tracked-vehicle track bodies 1,2 between which there exists a maximum twist angle 3, as occurs upon the circulation about a guide wheel (not shown). In the following description of connection parts for the track bodies 1,2 such as lugs and clamping clips, in each case only one connecting part is described. Such connecting parts are multiply arranged. Their number depends, interalla, upon the tractive power to be transmitted by the track.

Co-formed frontally on the track bodies 1,2 are one-piece lugs 4, 5 on each of which a clamping clip 10 is screwed by way of a screw connection 11, 12.

The clamping clip 10 embraces a respective free end 13 or 14 of the pin 15 shown in Figure 3. As a result of measures which are not further mentioned here it is ensured that the clamping clip 10 is fastened to the pin 15 in form- and force-locking manner and a true-to-track travel of the track bodies 1, 2 is afforded. Vulcanised onto the pin 15 are rubber rings 20-23. The rubber rings 20-23 adhere to the wall 24 of a bore 25 by way of an adhesive coating 26 (see Figure 2). The diameter of these rubber rings 20-23 is greater than the diameter 36 of the bore 25; Upon the pressing-in into the bore 25, the rubber rings 20-23 are deformed, they fill up the interspaces 37,37' and are biassed.

In accordance with Figure 2, applied to the wall 24 of the tube body 1 is the adhesive coating 26 which connects the pressed-in rubber 30 securely to the wall 24 of the bore 25. Serving as adhesive coating 26 is a one- or two-component material known per se.

Referring to Figure 3, there is hereinafter described the method steps which are requisite for the torsionally-secure arrangement of the rubber rings 20-23 in the bore 25 of the track body 1.

(1) An adhesive coating 26 is applied to the, grease-free, wall 24 of the bore 25.

(2) The pin 15 with the rubber rings 20-23 vulcanised on is pressed, along with the addition of a lubricant (not shown) which is supplied in the direction of the arrow 31, for example a lubricating oil compatible with the rubber, into the bore 25.

(3) After the pressing-in of the rubberised pin 15, track bodies 1,2 are to be stored for about 70 hours at room temperature for the purposes of the reaction process between the adhesive coating 26 and the rubber rings 20-23.

Atwo-compartmentadhesion agent which has proved suitable as the adhesive coating 26 is the product "Chemosil", ("Chemosil" is a Trade Mark of Firma Henkel.) The described bonding-in of the rubber rings into the bore of a track body is readily transferrable to torsion-stressed or shear-stressed spring elements, preferably those spring elements having biassed rubberisings between metal parts. As an example let there be mentioned a spring element such as is used in the rear axle of a motor vehicle.

Instead of being of rubber, the rings may be of any other suitable elastomeric material.

Claims

1. A pin cushioned in a hole in a body by elastomeric material vulcanised on, or bonded on, said pin, relative twisting movement being able to take place between said pin and said body, characterised in that the elastomeric material is adhered by way of an adhesive coating to the wall of the said hole.

2. A pin cushiioned in a hole in a body as claimed in Claim 1, characterised in that the elastomeric material is rubber, vulcanised on said pin.

3. A rubber-cushioned pin for a track of a tracked vehicle, said pin having rubber rings which are vulcanised on, and said pin being pressed into a bore, provided for the pin, or a track body, characterised in that the rubber rings are adhered by way of an adhesive coating onto the wall of the bore.

4. A rubber-cushioned pin as claimed in Claim 3, characterised in that the adhesive coating consists of a commercially-available cold vulcanisate or adhesion agent.

5. A method of mounting rubber rings which are adhered into a bore of a body of a track of a tracked vehicle and which are vulcanised onto a pin, characterised by the following method steps: (1) applying adhesive to a grease-free wall of the bore: (2) pressing the pin with rubber rings vulcanised thereon into the bore with use of a lubricant; (3) storing the track body, provided with the pin, at room temperature for about 70 hours.

6. A track of a tracked vehicle having a rubbercushioned pin, substantially as herein-described with reference to the accompany drawings.

7. A method of mounting a rubber-cushioned pin in a body of a track for a tracked vehicle, substantially as herein-described with reference to the accompanying drawings.