DE7001050U - COLLARS ON COLLECTORS. - Google Patents

Description

BÜge.lfederung Pantographs

There are known so-called. Halbscheren- or Einarmstromabnehmer whose on the top of Soherengestelles rotatably mounted (double) sliders are positively guided by parallel guide links in each occurrence altitude parallel to the contact wire.

The parallel guide link, which is hooked on the lower Soherenarm and runs approximately parallel to the upper scissor arm, however, means a considerable additional effort in terms of construction and manufacturing, increases the moving masses in a dynamically unfavorable way and increases the costs for maintenance (e.g. lubrication and maintenance of the pantograph ·

The additional and complex parallel guidance is unnecessary due to the inventive arrangement of a suspension system on the scissor frame, which has the same good suspension properties at all heights, ie at every inclination of the upper scissor arm, so that there is no need for a guide device to maintain a certain position.

Invention? "- ^ Eäß this suspension system consists of 2 crossing, torsionally - mounted pairs of swing arms, on which the grinding bow is freely mounted. Furthermore, the mutual position of the crossing swing arms is selected according to the invention so that the driving wind pressure acting on them is directed in opposite directions, vertical force and movement components generated. In Figure 1, the arrangement according to the invention is shown in principle.

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At the upper end of the upper scissor arm 1 of the scissors frame is the j Swing pair 2 torsionally elastically supported, of which only the one to the viewer ' facing Sohwinge is drawn. The other wing is behind the plane of the picture. The tension spring 3 holds the Sohwinge 2 under the Weight of the grinding belt and the contact pressure of the catenary against the upper scissor arm in a certain relative equilibrium position. The rocker thus maohts the pivoting movements of the upper scissor arm depending on its altitude.

At the other end of the rocker 2 is a second rocker k torsionally flexible articulated This is also held against the Sohwinge 2 by a tension spring 5 in a certain equilibrium position in such a way that the two wings cross at an angle that is smaller than 90 °.

Arrow V symbolizes the applied _{driving wind pressure, S. and S 2} mean the vertical movement components of Sohwingen 2 and 4 caused by it.

On the Sohwinge k the (double) grinding bow 6 is freely rotatable, which is guided by the contact wire in the operating position. This position is also maintained without contact with the contact wire, in that, according to the invention, the center of gravity of the grinding bow is arranged somewhat below the axis of rotation. The same also applies to the attack force of the driving wind forces, which is caused by the downward protruding contact ears 7 of the grinding arm.

The Bückstellmouente 2 between the Sohwinge 2 and the upper scissor arm on the one hand, as well as between the two wings on the other hand, can Instead of tension springs, other types of suspension elements can also be produced, e.g. torsion springs, torsion bar springs, rubber suspension elements and the like

According to the invention, the same suspension system can also be used successfully on pantographs with a parallelogram-like base frame.

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The inventive combination of 2 intersecting, torsionally elastic Spring-loaded wings have the consequence that their individual springs are ederimgswege at the various inclinations of the upper arm add and complement each other.

For example, while the effective lever arm of the lower arm 2 decreases with the increasing inclination of the upper shear arm, the effective arm decreases Lever arm of the upper rocker 4 and vice versa. As a result, remains the sum of the suspension travel independently of the inclination of the upper arm 1 is at least approximately the same.

Another advantage of the inventive arrangement of the Btigeliirehachse on the swing system described is that the Distance between the top of the bracket and the one below The axis of rotation, i.e. the damaging lever arm for the wind attack, can be kept very small. As a result, the durolb also remains Driving wind caused and undesired shifting of the Anpreßdmoke between the front and rear contact strips negligibly small

Claims (3)

! If 1) Arrangement of the abrasive hoop on pantographs as a result characterized in that a rocker 2 is rotatably mounted at the tip of the scissors frame 1, at the other end a second rocker 4 crossing them is also mounted in a torsionally elastic manner, on the free end of the grinding hanger 6 rotatable rests, whereby the mutual position of the crossing wings is chosen so that the Fahrwlnddruok acting on them generates oppositely directed, perpendicular force components. 2) Arrangement of the grinding bracket on pantographs according to Claim 1, characterized in that the intersecting wings enclose an acute angle. 3) Arrangement of the grinding bracket on pantographs according to Claim i, characterized in that the center of gravity of the grinding hanger and the point of application of the driving wind forces are below its axis of rotation.