DE3416749A1 - COMBINED TOW AND PUSHING DEVICE - Google Patents

Abstract

1. Combined drawing and buffing device having a friction spring (12) and a resilient cartridge (14) for central buffer couplings of rail vehicles, the device being inserted into the drawbar connecting the trumpet to the articulation or replacing the said drawbar and the resilient cartridge comprising a tubular body with a piston which is displaceable counter to the spring medium and the piston rod (27) of which leads out of the resilient cartridge, the resilient cartridge lying with longitudinal displaceability in a friction spring arranged in a casing cardinically mounted at the articulation, characterized in that the resilient cartridge (14) is connected to the trumpet and is mounted rotationally fast in the casing (11), and in that an intermediate piece (15) has a stop (16) resting against the forward end of the friction spring (12) and a stop (26) which rests against the piston rod (27), leading out rearwards, of the resilient cartridge (14) and, in addition, both rests via a rear spacer (30) against the rear end of the friction spring (12) and has a clearance (R) relative to the end stop (31) which corresponds to the deflection of the friction spring (12).

Description

2 -.3- * * *. : * "fträntanwail W- L'Jung, Augusto-AII ·· 10.6380 Bad Homburg

^ 9f * oif.o5.198if

Combined pulling and pushing device

The invention relates to a combined pulling and pushing device with ring spring and elastic cartridge for central buffer couplings of rail vehicles, whereby the device is in the coupling head with the articulation on the vehicle connecting tie rod is inserted or replaced and the elastic cartridge from a tubular body with a piston which can be displaced against the spring medium and which is led out of the cartridge via a piston rod.

Pulling and pushing devices using annular springs are known. Annular springs are particularly advantageous because relatively large forces can be cushioned with such devices with relatively small spring travel. With ring springs, however, no shock devices can be built which only respond above a certain limit and then absorb the excessive shock and keep the energies that occur in such shocks away from the vehicle. For example, DE-PS 19 W? 819 proposed a device which is able to absorb oversized impacts. The disadvantage of this device, however, is that it only responds in the event of relatively large impacts on the dome head and must be replaced by a new device after each response. This effort is considerable.

Next are elastic cartridges with a wide variety of spring media known. The best known is the elastomer cartridge, which consists of a tubular body filled with a plastic as a spring medium or cylinder, with a piston with a low. Gap between cylinder wall and piston in the elastomer compound can be pressed in, which is then displaced and flows around the piston. Then there is no more pressure on the piston exercised, the elastomer flows back into the cylinder due to its special properties, so that after a some time the elastomer cartridge is back in its original state

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. "" .- "£ * · -." "Pijjemanwattihr. L. ^ Jung, Augusta-AHee 10.6380 Bad Homburg

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State with protruding piston rod. The force that is necessary to push the piston into the plastic mass, can now either by changing the properties of the plastic compound or by changing the gap between Cylinder wall and piston can be adjusted. Since the elastomer compound also has a certain elasticity, the Elastomer cartridges can also be used, for example, instead of ring springs in central buffer couplings, but this has the disadvantage that the spring travel that can be achieved with it is usually too short for practice. - ·

The present invention is therefore based on the object to avoid the disadvantages of the known constructions and a Combination of ring spring elements and elastic cartridges for central buffer couplings to use that exploits the advantages of both elements without having to accept their disadvantages.

The solution to the problem is that one with the dome head connected elastic cartridge non-rotatably but slowly displaceable within a gimbal-articulated to the articulation Housing mounted annular spring and that an intermediate piece is a stop that rests against the front end of the annular spring and has a stop which rests against the piston rod of the elastic cartridge that is led out to the rear and which is located also applies both via a rear intermediate layer against the rear end of the ring spring and one of the deflection of the Ring spring has a corresponding distance from the end stop.

The characteristics of the ring spring and the elastic cartridge are advantageously set differently, preferably the response force of the elastic cartridge is greater than the largest Spring force of the ring spring.

The intermediate piece expediently consists of a pipe section the front end of which the outwardly protruding stop on * is screwed, which rests against the front end of the ring spring via a front intermediate layer.

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5r. Augusta-AH 10.6380 Bad Homburg

* ■ - ' ^: "" V "' _a "' 3-1912 / 82 +

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The advantage of the device according to the invention lies above all in that the elastic cartridge already has an elastic intermediate buffer in the area in which the ring spring fulfills its function forms, which only comes into effect when the entire way of the Kingfeder has been compressed, and then still can catch oversized bumps elastically.

According to the drawing, in which an example embodiment is shown using an elastomer cartridge, the housing 11 for the annular spring (12) is gimbaled to the (not shown) linkage housing and is held in the horizontal plane in the center by known support legs 13 , which can also be replaced by any other known device for centering. A known elastomer cartridge 14 is arranged inside the annular spring 12 and is connected at the front end to the coupling head (not shown). An extension piece can also be provided between the elastomer cartridge 14 and the coupling head. A tubular intermediate piece is provided between the ring spring 12 and the elastomer cartridge I4, in which a stop 16 is screwed on at the front end, which protrudes radially outward over the intermediate piece 16 and extends over the front intermediate layer 17 at the front end of the ring spring \ 2. applies. Sliding blocks made of plastic with low coefficients of friction are arranged at 18 between the elastomer cartridge 14 and stop 16, at 19 between stop 16 and annular spring housing 11 and at 2o between annular spring housing 11 and the front intermediate layer 17, which results in good displaceability between the three parts relative to one another .

Rotation of the individual parts with respect to one another is prevented in that, on the one hand, a wedge 22 is fastened to the annular spring housing 11 with the screw 23 ο which is mounted in a longitudinally displaceable manner in a groove 21 in the stop 16. Rotation of the intermediate piece 15 with respect to the housing 11 is thus prevented. On the other hand, the elastomer cartridge I4 carries a wedge 24 which is displaceable in a longitudinal slot Z ^ in the intermediate piece 15

O. Augusta-ΑΒββ 10.63S0 Bad Homburg

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is. This causes a twisting of the elastomer cartridge 14 prevented relative to the intermediate piece 15. Both measures together thus prevent the-from attaching to the elastomer cartridge 1 if Can rotate the coupling head with respect to the linkage.

At the rear end of the intermediate piece 15, a stop 26 is screwed in so far that the stop 26 rests against the rearward protruding piston rod 27 of the elastomer cartridge 1 Zf and creates a preload with the collar 34, the piston rod 27 in a recess 28 engages in the stop 26. A collar or flange 29 protruding outwardly beyond the intermediate piece rests against the annular spring 12 from behind via the rear intermediate layer 3o. Bund'29 can also be part of stop 26. The intermediate layer is extended to the rear to such an extent that it rests against the end stop 31 and thereby forms the abutment for the annular spring 12. Between the end stop J> \ and the stop 26, in the normal position, there is a distance R which corresponds to the permissible deflection travel of the singing spring 12. Between the rear intermediate layer 3o and the housing 11 on the one hand and the flange 29 on the other hand, sliding pieces 32 and 33 made of a low-friction plastic are arranged.

The shocks occurring in normal traffic are transmitted from the coupling head to the elastomer cartridge Ii *, which in turn transmits the shocks via the piston rod 27, the stop 26, the intermediate piece 15, the stop 16 and the intermediate layer 17 to the annular spring 12, which then compresses. If the impact force exceeds the force of the ring spring Ϊ2 when the impact is too great, the stop 26 is pushed back until it rests against the end stop 31, i.e. has passed through the path R. As a result of the oversized impact, it is now further over the coupling head to the When the elastomer cartridge 14 is pressed, the cartridge I4 is displaced by a maximum of the path E, the piston rod 27 being pushed into the cartridge I4 and displacing the plastic there in a known manner

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Ρ «· πΰη * ΜΛ" Η.-LAX ^ g, AugusU-A »·· 10.6380 BadHomburg

16749

The response force of the elastomer cartridge I4 is greater than the largest force to be applied by the annular spring 12. During the penetration the piston rod 27, the impact energy is destroyed. This shock energy is kept away from the linkage and thus from the vehicle. If the shock stops, the elastomer cartridge 14 shifts again as a result of the known properties of the elastomer again within the intermediate piece 15 by the path E to the front, until the state shown in the drawing is reached again. Since the response force of the elastomer cartridge 1 if strongly depends on the approach speed depends, it may be possible that an overlay occurs during the axial movement of the coupling head the strokes of the ring spring 12 and the elastomer cartridge I4 takes place.

When the coupling head is pulled, the elastomer cartridge I4 is pulled forward. Then the tensile force is transmitted via the collar 34 »the intermediate piece 15, the flange 29 and the rear intermediate layer J> o to the annular spring 12, which rests against the collar 35 and compresses. The elastomer cartridge 14 is not used when pulling on the coupling head.

Of course, the arrangement can also be the same Reverse the mode of operation so that the coupling head is arranged on the annular spring housing 11 and the device with the elastomer cartridge 14 is hinged to the vehicle directly or via a pivot housing.

The stops 16 and 26 are secured against rotation on the intermediate piece 15 in a manner known per se. It can too all known center resetting devices can be used. *

The spring medium in the elastic cartridge can be an elastomer pressurized gas, an EkLd connected to an accumulator or also one or more ring or coil springs, divided or undivided, be.

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Claims (1)

Expectations CP Combined pull and push device with ring spring and elastic cartridge for central buffer couplings of rail vehicles, whereby the device is inserted into or replaces the pull rod connecting the coupling head with the articulation on the vehicle and the elastic cartridge consists of a tubular body with a piston that can be displaced against the spring medium consists, which is led out of the cartridge via a piston rod, d & characterized in that an elastic cartridge (14) connected to the coupling head is non-rotatably but longitudinally displaceable within an annular spring (12) mounted in a housing (11) hinged to the articulation and that an intermediate piece (15) has a stop (16) resting against the front end of the annular spring (12) and a stop (26) resting against the piston rod (Z?) of the elastic cartridge (14) that is led out to the rear, which is also applied both via a rear intermediate layer (30) against the rear end of the annular spring (12) al s also has a distance (R) from the end stop (3I) corresponding to the deflection of the annular spring (12). 2.) pulling and pushing device according to claim 1, characterized in that that the characteristics of the ring spring (12) and the elastic cartridge (14) are different, preferably the response force the elastic cartridge (I4) is larger than the largest Spring force of the ring spring (12) 3) Pulling and pushing device according to claim 1 or 2, characterized in that that the intermediate piece (15) consists of a pipe section, on its front end the outwardly protruding stop (16) is screwed on, which extends over a front intermediate layer (17) supported against the front end of the ring spring (12). EPO COPY - "■ = £ ■ -:. ■ - Pfrtwtfanwa« + ;. L-Jung, AugusU-ABee 10.6380 Bad Homburg if.) Pulling and pushing device according to one of claims 1 to 3 _9, characterized in that the rear stop (26) is screwed into the tubular intermediate piece (15) until the stop (26) on the piston rod (27) of the elastic -The cartridge (1Zf) is in contact and, if necessary, the elastic cartridge (1if) is supported against a stop (3k) t such as collar, pin, etc., opposite the intermediate piece (15). 5.) Pulling and pushing device according to one of claims 1 to kt, characterized in that the rear intermediate layer (3o) is extended to the end stop (31) of the housing (11) and rests there. 6.) Pulling and pushing device according to one of claims 1 to 5> characterized in that sliders (18,19 »2o, 32,33)» preferably made of a low-friction plastic, between the surfaces of the housing (11) that slide on one another, of the intermediate piece (13), the intermediate layers (16.3o) and the elastic cartridge (1lf) are arranged. 7.) pulling and pushing device according to one of claims 1 to 6, characterized in that the spring medium in the elastic cartridge (H) is an elastomer. IPO COPY