CN2546263Y

CN2546263Y - Retractable step

Info

Publication number: CN2546263Y
Application number: CN02211142U
Authority: CN
Inventors: 陈淑利; 蒋菲菲; 张斌; 王磊
Original assignee: Shenyang University
Current assignee: Shenyang University
Priority date: 2002-04-11
Filing date: 2002-04-11
Publication date: 2003-04-23
Anticipated expiration: 2012-04-11

Abstract

A retractable ladder comprises a ladder, a slide way, a sliding rod and a drive element. The ladder is a parallel four-rod mechanism composed of a treadboard and a support stand which are mutually hinged; the slide way is fixed on a vehicle body; a slide block is arranged on the upper end of the slide way; a bearing is arranged in the slide way and connected with the treadboard on the upper end of the ladder. The sliding rod is fixed on the vehicle body; a backing pin is arranged on the top end of the sliding rod which is sleeved with a spring and the slide block; the end part of the support stand on the upper end of the ladder is hinged with the slide block on the sliding rod. The drive element comprises a cylinder and a piston rod; the end part of the piston rod and the treadboard on the upper end of the ladder are hinged with a hinge shaft of the support stand. The utility model has the advantages that the goer can conveniently get on and off the vehicle with the help of the ladder which saves space inside the carriage.

Description

But folding and unfolding ladder

The utility model relates to a kind of mechanical device, the get on or off the bus mechanism of usefulness of particularly a kind of people of being used for.

No matter existing automotive ladder is automobile or train, and the ladder of the usefulness of getting on or off the bus all is to be fixed on the compartment, in order to save the space, compartment, the pedal of car ladder is narrower, and the height of whenever pedaling is also very high, it is very steep that whole ladder just seems, particularly for old man and child, getting on or off the bus seems gruelling.

But the purpose of this utility model provides a kind of pedestrian's HOP ON and does not take the folding and unfolding ladder in space, compartment.

The purpose of this utility model is achieved in that the utility model comprises ladder, slideway, slide bar and driver element, and ladder is hinged by pedal and bracing frame and forms parallelogram lindage.Slideway is fixed on the car body, and the slideway upper end is equipped with block, is equipped with bearing in the slideway.Slide bar is fixed on the car body, and the top of slide bar is equipped with backing pin, on the slide bar from the top of litter to fixed end pocketed springs successively and slide block.The end and the slide block on the slide bar of the upper end bracing frame of ladder are hinged, and ladder upper end pedal non-trampled end and be connected with bearing on the slideway by axis.Driver element comprises cylinder and piston rod, and cylinder is fixed on the car body, and telescopic piston rod is housed on the cylinder, and the hinge between the end of piston rod and ladder upper end pedal and the bracing frame is hinged.

The utility model compared with prior art can reach the purpose that ladder launches and shrinks by controlling the flexible of cylinder upper piston rod.Can design the length of stair treads and the height of bracing frame as required during expansion, reach the purpose of pedestrian's HOP ON, can reach the purpose of saving the space, compartment during contraction.

The utility model is described in further detail below by accompanying drawing.

Fig. 1 is a structural representation of the present utility model;

Structural representation when Fig. 2 is in contraction state for ladder.

See Fig. 1, this is suitable for novel ladder, slideway, slide bar and the driver element of comprising.Ladder is hinged by pedal 1 and bracing frame 2 and forms, and pedal 1 is a rectangular frame, can be equipped with figuratum steel plate on the pedal 1, tramples for the people.Bracing frame 2 can rotate around hinge with pedal 1, constitutes parallelogram lindage.

Slideway 14 is fixed on the car body, and slideway 14 is a grooved, and slideway 14 upper ends are equipped with block 11, and block 11 plays spacing and effect holding capacity, is equipped with bearing 13 in the slideway 14.Slide bar 6 is fixed on the car body, and the top of slide bar 6 is equipped with backing pin 8, on slide bar 6 from backing pin 8 to fixed end pocketed springs 7 and slide block 5 successively.Slide block 5 can slide on slide bar 6, and spring 7 can guarantee that slide block 5 when ladder launches (work), arrives fixed end.

The end and the slide block 5 on the slide bar 6 of ladder upper end bracing frame 4 are hinged.Axises 12 are hinged in the non-bearing of trampling on end and the slideway 14 13 of ladder upper end pedal 15, and bearing 13 can slide in slideway 14.

Driver element comprises cylinder 9 and piston rod 10.Cylinder 9 is fixed on the car body, is equipped with piston rod 10 on the cylinder 9, and the hinge 3 between the top of piston rod 10 and ladder upper end bracing frame 4 and the pedal 15 is hinged.State when Fig. 1 is in expansion (work) for ladder, the effect by slide bar 6 fixed ends and slideway 14 blocks 11 should guarantee that stair treads are level attitude, bracing frame is perpendicular.State when Fig. 2 shrinks for ladder is in, when piston rod 10 withdrawals, by ladder upper end pedal 15 drive bearings 13 along slideway 14 to lower slider, after being retracted to certain position, driving slide blocks 5 by ladder upper end bracing frame 4 and slide to backing pin 8 directions along slide bar 6.When reaching capacity the position, can guarantee that ladder is contracted in together, save a large amount of spaces.

Claims

1, but a kind of folding and unfolding ladder comprises ladder, slideway, slide bar and driver element, it is characterized in that:

Ladder is hinged by pedal and bracing frame and forms parallelogram lindage; Slideway is fixed on the car body, and the slideway upper end is equipped with block, is equipped with bearing in the slideway; Slide bar is fixed on the car body, and the top of slide bar is equipped with backing pin, on the slide bar from the top of litter to fixed end pocketed springs successively and slide block; The end and the slide block on the slide bar of the upper end bracing frame of ladder are hinged, and ladder upper end pedal non-trampled end and be connected with bearing on the slideway by axis; Driver element comprises cylinder and piston rod, and cylinder is fixed on the car body, and telescopic piston rod is housed on the cylinder, and the hinge between the end of piston rod and ladder upper end pedal and the bracing frame is hinged.