CN2254855Y

CN2254855Y - Hand cart for upstairs use

Info

Publication number: CN2254855Y
Application number: CN 96205001
Authority: CN
Inventors: 陈永兴
Original assignee: Individual
Current assignee: Individual
Priority date: 1996-03-14
Filing date: 1996-03-14
Publication date: 1997-05-28
Anticipated expiration: 2006-03-14

Abstract

The utility model relates to a stair climbing cart. A telescopic foot frame is arranged on a lower transverse rod of a cart composed of a loading frame and cart wheels, and the lower transverse rod is also a rear wheel shaft of the cart. A telescopic swinging rod which is perpendicular to the transverse rod is arranged on the transverse rod on the loading frame, and a spring is arranged between the swinging rod and the transverse rod in the loading frame. A straight rod on the loading frame is extended with a telescopic upper straight rod whose length can be adjusted when the utility model is used for loading heavy objects to enable the utility model to be labor-saving. A telescopic structure is composed of an outer pipe and an elastic wedge arranged in the outer pipe, a plurality of holes are arranged on the wall of the outer pipe, and the top of the elastic wedge is protruded out of a hole to adjust the length of the elastic wedge. The utility model can be used for climbing stairs when the foot frame touches with the ground and the rear wheel is separated from the ground. The utility model has the advantages of simple structure and convenient use.

Description

The cat ladder car

The utility model relates to a kind of hand barrow, relates to two of a kind of climbing stairs ladder or rather and takes turns or four-wheeled hand truck.

Existing loaded with articles or manned two is taken turns or four-wheeled hand truck, as take turns Wheel-chair, Caddy, baggage car, lorry etc., its basic structure can be referring to Fig. 1, constitute by loading frame 101 and wheel 102, such hand barrow only can be on the level land or limited slope travel, it is particularly just powerless during the stair in the building to run into ladder, brings inconvenience to use.

The purpose of this utility model is a kind of cat ladder car of design, by on existing hand barrow, some parts being set, make hand barrow can not only be on the level land, the slope travels, and also can climb stair, time saving and energy savingly makes things convenient for the common people.

Cat ladder car of the present utility model comprises loading frame and wheel, and loading frame includes two straight-bars and upper, middle and lower three cross bars at least, it is characterized in that:

Described sheer pole two ends respectively are provided with a telescopic garden cast foot rest, and described cross tube is provided with a pair of perpendicular to cross bar and telescopic garden cast swing arm parallel to each other, are provided with spring between described telescopic garden cast swing arm and described middle cross bar;

Described telescopic garden cast foot rest or described telescopic garden cast swing arm are by outer tube and be arranged at elasticity chock in the outer tube, the interior bar that links with the elasticity chock constitutes, outer tube wall is provided with at least one hole, and described elasticity chock top protrudes from outside the outer tube hole.

Extend upward respectively on described loading frame two straight-bars telescopic garden cast upper straight rod is set, by outer tube and be arranged at elasticity chock in the outer tube, the interior bar that links with the elasticity chock constitutes, outer tube wall is provided with at least one hole, described elasticity chock top protrudes from outside outer tube one hole, two upper straight rod tops bend inwards and link cross bar, and cross bar is provided with active pull rod.

Cast swing arm top, described telescopic garden bends inwards and is connected with the handle type cross bar, and described telescopic garden cast foot rest and cast swing arm bottom, described telescopic garden are provided with rubber cushion.

Described sheer pole is a hind axle, and described telescopic garden cast foot rest is arranged on the wheel shaft of contiguous rear wheel.

The length of adjusting the telescopic garden of cat ladder car cast foot rest lands it, and the unsettled cat ladder that gets final product of rear wheel; Otherwise, transfer the short rear wheel Shi Zeke that lands when foot rest length and travel in flat, slope; The cat ladder that when swing arm is longer than foot rest, makes progress, otherwise cat ladder downwards then.

Further specify technology of the present utility model below in conjunction with the embodiment accompanying drawing:

Fig. 1, common hand barrow perspective view;

Fig. 2, cat ladder car perspective view;

The side-looking structural representation of cat ladder car among Fig. 3, Fig. 2;

Fig. 4, cat ladder car resilient wedge substructure scheme drawing;

Spring extensional process scheme drawing when Fig. 5, cat ladder car climbing stair;

Spring contraction scheme drawing when Fig. 6, cat ladder car climbing stair;

Referring to Fig. 2, Fig. 3, it shown in the figure four-wheeled hand truck, 10,10a is respectively two telescopic garden cast swing arms parallel to each other, its hypomere tube wall is provided with plurality of holes 11,11a, cross tube 21 and inside bending that its upper end is passed through loading frame 20 respectively become

bend pipe

12,12a, cross bar 13 links two

bend pipes

12,12a forms handle, two telescopic garden cast swing arms 10, another cross bar 14 of intersegmental binding among the 10a, spring 51, the 51a two ends are separately fixed at a telescopic garden

cast swing arm

10,22 of the middle cross bars of 10a and loading frame 20, along with telescopic garden cast swing arm 10, the swing of 10a, spring 51,51a shrinks or stretches.The bottom of telescopic garden cast swing arm 10,10a is fixed with rubber or plastic pad 15,15a.

Position near

trailing wheel

23,23a on the hind axle 24 of loading frame 20 respectively is provided with a telescopic garden cast foot rest 31,31a, also is provided with plurality of holes 32,32a on its tube wall, and foot rest 31,31a bottom also are fixed with rubber or plastic pad 33,33a.

Two straight-bars 25 of loading frame 20,25a top then extend upward telescopic garden cast upper

straight rod

26,26a respectively, its tube wall is provided with plurality of holes 27,27a, the upper straight rod top bends inwards and links with cross bar 28, is equiped with an active pull rod 29 on cross bar 28.

Telescopic garden cast swing arm 10,10a or telescopic garden cast foot rest 31,31a or telescopic garden cast upper

straight rod

26,26a have identical structure, and its corresponding 1-1,3-3,2-2 sectional structure scheme drawing can be referring to Fig. 4.

In conjunction with referring to Fig. 4, it is in order to adjust its length on demand that swing arm 10,10a, foot rest 31,31a, upper

straight rod

26,26a are designed to telescopic structure, stretching structure comprises outer tube 40, is positioned at the elasticity chock 41 of outer tube 40 and the bar 42 that links with elasticity chock 41, make elasticity chock 41 protrude in a certain hole of outer tube 40 during adjustment, as among Fig. 2 11, the black hole of 11a, 27,27a, 32,32a, the fixedly length of telescopic pipe.When hand barrow on the level land or slope when travelling, the length of telescopic garden cast foot rest 31,31a should be shorter than

wheel

23,23a is promptly unsettled to ground-surface height, when hand barrow during at stair climbing, it is that wheel is unsettled that the length of telescopic garden cast foot rest 31,31a should be longer than

wheel

23,23a to ground-surface height, but is shorter than telescopic garden cast swing arm 10,10a to ground-surface height.

Action during the hand barrow stair climbing can be referring to Fig. 5, Fig. 6, one holds handle 13, active pull rod 29 draws in another subordinate, telescopic garden cast swing arm 10,10a swing backward at this moment, spring 51,51a uphold as shown in Figure 5, telescopic garden cast foot rest 31,31a be in the last step of stair shown in C point among the figure,

wheel

23,23a are then unsettled.To push away on the active pull rod 29 then, telescopic garden cast swing arm 10,10a swing forward, and spring 51,51a shrink as shown in Figure 6, and the bottom rubber cushion 15 of swing arm 10,10a, 15a just automatically move to the B point by the A point.Repeat above-mentioned action, hand barrow can be climbed the destination step by step.When need climb down stair, if with the length adjustment of telescopic garden cast swing arm 10,10a to the length that is shorter than telescopic garden cast foot rest 31,31a, the repetition aforesaid operations just can be gone downstairs step by step.Hand barrow is on the level land or slope when travelling, and

wheel

23,23a land, and swing arm and

foot rest

10,10a, 31,31a then shorten.

Telescopic garden cast upper

straight rod

26,26a and cross bar 28 that this cat ladder car is set are for can suitably adjusting its length when delivering weight, according to lever principle the labour-saving effect can being arranged.

Cat ladder car of the present utility model is by installing length-adjustable retractility foot rest additional on the hind axle of existing hand barrow, length-adjustable straight formula retractility swing arm also is set on the cross bar of hand barrow loading frame, and between swing arm and loading frame cross bar, spring is set, the length of adjusting foot rest, swing arm also makes it and trailing wheel to ground-surface height keeps certain relation, promptly can be used for climbing ladder or downwards cat ladder or on the level land, the slope travels.Have simple in structure, implement convenient, use simple advantage.This cat ladder car still is designed to the upper straight rod of loading frame length-adjustable telescopic, can adjust its length and make laborsaving when loading than parcel.

Claims

1, a kind of cat ladder car comprises loading frame and wheel, and loading frame includes two straight-bars and upper, middle and lower three cross bars at least, it is characterized in that:

2, cat ladder car according to claim 1, it is characterized in that: extend upward respectively on described loading frame two straight-bars telescopic garden cast upper straight rod is set, by outer tube and be arranged at elasticity chock in the outer tube, the interior bar that links with the elasticity chock constitutes, outer tube wall is provided with at least one hole, described elasticity chock top protrudes from outside outer tube one hole, two upper straight rod tops bend inwards and link cross bar, and cross bar is provided with active pull rod.

3, cat ladder car according to claim 1 is characterized in that: cast swing arm top, described telescopic garden bends inwards and is connected with the handle type cross bar, and described telescopic garden cast foot rest and cast swing arm bottom, described telescopic garden are provided with rubber cushion.

4, cat ladder car according to claim 1, it is characterized in that: described sheer pole is a hind axle, described telescopic garden cast foot rest is arranged on the wheel shaft of contiguous rear wheel.