US 11,753,050 B2
Ascent aid on a rail vehicle
Stefan Hintermeir, Aschau I.Ch (DE)
Assigned to Siemens Mobility GmbH, Munich (DE)
Appl. No. 17/267,069
Filed by SIEMENS MOBILITY GMBH, Munich (DE)
PCT Filed Jul. 15, 2019, PCT No. PCT/EP2019/069031
§ 371(c)(1), (2) Date Feb. 9, 2021,
PCT Pub. No. WO2020/035247, PCT Pub. Date Feb. 20, 2020.
Claims priority of application No. 102018213727.7 (DE), filed on Aug. 15, 2018.
Prior Publication US 2021/0309266 A1, Oct. 7, 2021
Int. Cl. B61D 23/02 (2006.01)
CPC B61D 23/025 (2013.01) [B61D 23/02 (2013.01)] 6 Claims
OG exemplary drawing
 
1. An ascent aid for a rail vehicle having a vehicle body, a driver's cab and a step, the ascent aid comprising:
a first folding mechanism fastened to a first end of the step, as seen in a longitudinal direction of the step;
a second folding mechanism fastened to a second end of the step opposite to the first end of the step, as seen in the longitudinal direction of the step;
each of said folding mechanisms having two respective lateral rods;
said two lateral rods having respective lower ends connected by respective hinges to the step, and said two lateral rods having respective upper ends connected by respective hinges to the vehicle body;
each of said folding mechanisms having a respective connecting rod additionally connecting one of said lateral rods by hinges to the vehicle body, and said one connecting rod being divided into two parts by a folding hinge;
said folding hinge being coupled to an action of force, said action of force on said folding hinge causing the step to be folded by said hinges between a first position and a second position relative to the rail vehicle, an ascent to the driver's cab of the rail vehicle being assisted in said first position of the step, and the step being folded in said second position to maintain a predetermined clearance gauge of the rail vehicle;
said first folding mechanism including a first cylinder for providing said action of force, said first cylinder having one end connected to said folding hinge of said connecting rod and another end connected to the vehicle body, said first cylinder in said first position with the step unfolded being extended, causing said connecting rod to have a bend, and said first cylinder in said second position with the step folded in, being retracted causing said connecting rod to be straightened to lock said folding mechanism in said second position;
said second folding mechanism including a second cylinder for providing said action of force, said second cylinder having one end connected to said folding hinge of said connecting rod and another end connected to the vehicle body, said second cylinder in said first position with the step unfolded, being retracted causing said connecting rod to be straight to lock said second folding mechanism in said first position, and said second cylinder in said second position with the step folded in, being extended causing said connecting rod to have a bend; and
said action of force on said folding hinges causing the step to be mounted so as to be foldable in a movement plane transversely relative to a longitudinal direction of the rail vehicle.