CN2455568Y - Foldable trolley for moving on stairs - Google Patents

Abstract

The utility model belongs to a folding trolley for going upstairs and downstairs. Because only a wheel of the existing folding hand pulling truck is rolled, thus a step and an obstacle which are higher than the radius of the wheel can not be passed over by the truck. An inclined surface supporting frame [3] with a chute is additionally arranged and laid on the inclined surface of the step, which enables the trolley body to be smoothly moved along the inclined surface of the step on each step to achieve the functions of going upstairs and downstairs. A return spring [4] enables the process to be repeated continuously.

Description

Can upper and lower stair pull little folding pony truck

The utility model relates to a kind of when the people pushes hard or draw, the folding pony truck of the upper and lower stair of energy.

At present, people go out or when purchasing article, when those article of carrying, use a kind of simple and easy lorry that pulls usually, this car has only car body and two wheels, wheel can only travel on the level land, can not cross 90 ° the obstacle that is higher than wheel, thereby can not directly cross stair, when running into stair, must carry down article on the car to shoulder and go upstairs, bring many inconvenience to the user.

The purpose of this utility model just is to overcome the weak point of the problems referred to above, and provide a kind of can upper and lower stair pull pony truck.

The utility model achieves the goal by following measure: the utility model is on the connecting rod (5) of common hand cart wheel, one cover inclined-plane ladder (2) is housed, it is the framework that one group of four limit links to each other, one chute (3) respectively arranged in the middle of two load-bearing connecting rods, and can ride between the two-stage platform level, its energy supported cart body weight is the track of car body stair activity.When on the level land, travelling, it is folded on the car body, when hand cart arrives stairway step, it is put down, allow its upper end ride on the upper class step, the lower end rides on that grade step at wheel place, make it be layered on the bracing frame that forms a ladder formula between the two-stage step, thereby 90 ° steps are become less at an angle inclined-plane, and along this inclined-plane, pony truck just is easy to be pulled on the upper class step.Two strut bars at this cover inclined-plane ladder (2) are being opened one chute (3) along side surface direction, the connecting rod of wheel (5) passes this twice chute, and can slide into the upper end from the chute lower end, the upper and lower stair of hand cart are realized by wheel connecting rod (5) upper and lower slip in chute (3).There are a spring (4) one ends to be connected on the car body, one end is connected on the inclined-plane ladder (2), its effect be when hand cart when chute upwards moves on to, it is elongated, when car body is climbed to the upper class step, it shrinks and hauls the inclined-plane ladder and moves forward, and the ladder upper end is ridden over again on the one-level step limit, front.(7) for putting the goods support, technical process of the present utility model is exactly: when dolly is come the step limit, put down inclined-plane ladder (2), allow its upper end ride on the step limit, front, form a slope, [one group of positioning convex (6) is buckled on the step limit, prevent that the inclined-plane ladder from moving], when the user hauled lorry and continues to go ahead, the connecting rod of wheel (5) will begin along the lower end of inclined-plane ladder chute (3) upwards to slide, at this moment, the vehicle built on stilts, the weight of car body is pressed on the inclined-plane ladder (2) by the wheel connecting rod, and the wheel connecting rod is in chute (3), slide into the upper end from the lower end, hand cart has also just been climbed on the upper class step from following step.In this course, spring (4) is elongated.When car body arrived upper class step plane, wheel can touch step surface, and at this moment, the weight that is pressed on the wheel bar can be transferred on the wheel, is supported by wheel, and like this, the pressure that is pressed on the inclined-plane ladder (2) has just disappeared.Pressure one on the inclined-plane ladder (2) disappears, and spring (4) will shrink, and is being with it to move forward, ride over the Lian Zhishang of wheel previous stage step again up to its upper end, complete passage for lorry continues climbing, along with this process constantly repeats, pony truck will constantly be climbed up a lot of step.The process of going downstairs is identical therewith.

Adopt this structure, under the situation that does not increase a lot of accessories, the utility model just can be crossed some obstacles effectively, and can directly pull on stair or get off from stair, and needn't move down the traveller.

Figure one is a structural representation.

1, car body 2, inclined-plane ladder 3, chute

4, spring 5, wheel connecting rod 6, positioning convex 7, put shelf

During use, inclined-plane ladder (2) and car body are stacked, just can on the level land, freely travel, when running into the stair obstacle, put down the inclined-plane ladder, make its upper end ride over the upper class step edge, continue to draw forward, just can climb up stair.

Claims (1)

1, a kind of can upper and lower stair pull little folding pony truck, it is characterized in that: it by car body (1), be enclosed within on the wheel connecting rod of car body (1), and the inclined-plane ladder (2) that can move forward and backward, and a spring (4) that is connected between car body (1) and the inclined-plane ladder (2) is formed, inclined-plane ladder (2) is the framework that one group of four limit links to each other, and respectively is one hollow runner (3) in the middle of its two strut bar