CN2258477Y - Light cart for climbing stairs - Google Patents

Abstract

The utility model relates to a light cart for climbing stairs, which comprises a folding frame and rolling wheels. The extending ends on both sides of a fixed axle on the lower end of the folding frame are respectively provided with two rolling wheel supporting frames with three supporting arms. The three supporting arms form a Y shape, and the three supporting arms have equal length and are uniformly distributed. The ends of the supporting arms, which are corresponding to the supporting frames, are clamped with rolling wheels with equal diameter. The utility model has the advantages of simple structure, low cost, small shock vibration in the course of operation, flexible turning and labor saving of climbing stairs, and not only can advance on the ground, but also can climb stairs freely, and thus the utility model is suitable for transporting small articles upstairs and downstairs of domestic use and travel.

Description

Light ascending stair dolly

The utility model relates to the portable cargo instrument that can climb stair easily of drawing of a kind of usefulness.

Manually the travelling dolly is relatively more typical with two kinds for existing light cargo instrument at present.Wherein a kind ofly more see: promptly form by vehicle body that can fold and the single roller that splits tailstock both sides more.On flat ground surface, draw row or promote also to deserve to be called convenient, but lost its due shipping effect, especially under the many situations of story height, step number, have to lift or wait mode " negative car " pickaback and go with hand if want to step on the building once meeting step.Another has finding on the market the time, body portion and aforementioned a kind of similar on the structure only improves its tail of body: the single roller of both sides has become one big two little vertical three rollers lining up row, and axletree is contained on the big main wheel that is positioned at the middle part.Front and back are two little jockey pulleys, and when moving on the level land, big main wheel lands, two little jockey pulleys there is no any function, in case meet step, the little jockey pulley of fwd is just as fulcrum, the dilatory of armrest rolls up table top with big main wheel again, and at this moment, the little jockey pulley of back just becomes makes front-wheel, until running into next step, another repeats said process, adopts the mode of this somersaults to finish the ascending stair action just, yet owing to this kind vehicle structure is limit, firmly want big, also do not claim light than loadage itself.In brief, the difficult problem that a kind of dolly can't ascending stair before a kind of dolly in back had just solved remains the shortcoming in " effort ".

The purpose of this utility model is exactly in order to solve difficulty that above-mentioned freight trolley occurs when the ascending stair and not enough, and providing a kind of can advance on the level land, again ascending stair but also want labour-saving light shipping ascending stair device freely.

Technical solution of the present utility model is: light ascending stair dolly, comprise folding stand and roller, folding stand can utilize the body portion of common travelling dolly, in the lower end of folding stand one anchor shaft is set, anchor shaft both sides external part respectively is equipped with two rolling wheel supports that have three support arms, and three support arms are Shape is isometric uniform; Corresponding support arm end at two stands has clamped isometrical roller by wheel shaft.

When dolly was advanced on level land or platform, each side had two-wheeled to land, one take turns unsettled, run into step, front-wheel is obstructed, because vehicle body is still drawn by portable, rolling wheel support is subjected to the effect of overturning couple, produced a motion of upset rapidly around the front-wheel axle center, this moment, trailing wheel was liftoff, above unsettled roller then trend step on rank, meanwhile, the dolly vehicle body also and then jumps onto this step, and an ascending stair action of whole dolly is accomplished.Afterwards, follow the vehicle body reach, on new step surface, lower whorl becomes makes front-wheel, and trailing wheel becomes goes up wheel, and front-wheel is then filled the post of trailing wheel, at this of short duration equilibrium gap, for realizing ascending stair next time, goes up a new step again and has carried out sufficient preparation again.So cycle alternation rolls, and has realized ascending a height in the rank, rank of dolly.

Further describe the utility model below in conjunction with accompanying drawing:

Fig. 1 is the utility model vehicle structure cutaway view;

Fig. 2 is the front elevation of Fig. 1.

Wherein: 1, folding stand 2, roller body 3, band tyre 4, wheel shaft 5, roller 6, rolling wheel support 7, anchor shaft 8, roller 9, roller 10, rolling wheel support

As shown in the figure, anchor shaft 7 is positioned at the lower end of folding stand 1, and rolling wheel support 6,10 is sleeved on the external part of anchor shaft 7, isometrical roller 5,8,9 is installed between rolling wheel support 6,10 corresponding three support arms by three wheel shafts 4.

Among the figure in the dolly present position roller 5 on take turns, 9 be trailing wheel for front-wheel, 8.Roller is made up of roller body 2 and band tyre 3 two parts.

The utility model is simple in structure, reasonable in design, and folding stand can utilize existing travelling dolly, supporting convenience, and cost of manufacture is low.Impact shock is little in the use, flexible overturning, and ascending stair is laborsaving, the carrying of going downstairs on the centering small article that is suitable for travelling at home.

Claims (2)

1, a kind of light ascending stair dolly comprises folding stand and roller, it is characterized in that the lower end of folding stand is provided with an anchor shaft, and anchor shaft both sides external part respectively is equipped with two rolling wheel supports that have three support arms, and three support arms are

Shape is isometric uniform; Corresponding support arm end at two stands has clamped isometrical roller by wheel shaft.

2, ascending stair dolly according to claim 1 is characterized in that roller is made up of roller body and band tyre two parts.

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