CN2209094Y - Folding wheel fix device - Google Patents

Abstract

The utility model relates to a folding wheel fix device, comprising a main vehicle frame, a quadrilateral connecting rod, wheel support frames, and a positioner; the utility model is characterized in that the fixed wheel can be folded forwards and inwards, and the vehicle body can be shorten and narrowed; the folding wheel fix device is mainly applied to folding tricycles, such as folding carriages for children and the ages, baby carriers, etc; the utility model has the advantages of simple structure, handiness, safety and reliability.

Description

Folding wheel fix device

The utility model relates to a kind of wheel fixing device, especially collapsible positive tricycle wheel anchor fitting.

Three-wheel vehicle is people's vehicles of common, but is to take up an area of when the empty wagons greatly with its shortcoming of two-wheeled cycle comparison, is not easy to collection.Existing in recent years many Foldable tricycle patented inventions, but eventually owing to the cost height, complex structure, reasons such as use inconvenience fail generally to adopt.Number of patent application 88210439.X and 91214447.5 design have improvement greatly, but with the two-wheeled cycle comparative structure still be that the more complicated cost is higher.

The utility model purpose is for Foldable tricycle provides a kind of novel wheel fixing device, makes that there is breakthrough improvement in bindiny mechanism between main car frame and wheel.

The utility model purpose is achieved in that its overall structure by main car frame, quadrilateral connecting rod, and four parts of wheel stand and steady arm are formed.Wherein main car frame is exactly the ordinary bicycle vehicle frame and changes schoolbag frame slightly.Adopt hinge type to be connected, can rotate with sleeve-type.Transmission removes chain wheel, and chain, sprocket wheel have increased universal-joint outward in addition.It is characterized in that two trailing wheels can be inwardly folding forward.Utilizing spring pin to decide device fixes the state of drawing back and finishes folding operation.Certainly also can be designed to two parallel front-wheels according to same principle inwardly folds backward.

Because the utility model main car frame has utilized existing cycle frame and changed schoolbag frame slightly, and is hinged by two quadrangle side rods and wheel stand; Fixedly draw back state and carry out folding operation by the spring pin locating dowel pin, so structure is very simple, easy to operate cost is low.

Concrete structure of the present utility model is drawn by the following drawings.

Fig. 1 is the structural representation that the present invention is seen from behind.

Fig. 2 is a folding operation scheme drawing of the present invention.

Fig. 3 is locating pin structure figure.

Fig. 4 is a Foldable baby carriage, leading handle structure scheme drawing.

Fig. 5 is a fixedly scheme drawing of Foldable baby carriage trailing wheel.

Wherein: 1, schoolbag frame main body, 2 schoolbag frame right flanks, 3 schoolbag frame left wings, 4 off hind wheel supports, 5 off hind wheels, 6 left rear wheels, 7 quadrangle side rods, 8 brake discs, 9 left rear wheel supports, 10 sprocket wheels, 11 shelves, 12 bowls, 13 minor axises, 14 universal-joint connecting rods, 15 ball bearing of main shafts, 16 main car frames, 17 left back wheel shafts, 18 grabs, 19 slotted eyes, 20 latches, 21 pin holes, 22 spring pins, 23 springs, 24 spring pin heads, 25 leading handgrips, 26 head screws, 27 front forks, 28 positive holes, 29 side openings, 30 locating dowel pins (1), 31 locating dowel pins (2) 32 radius stays, 33 knock holees (1), 34 knock holees (2)

Further specify below in conjunction with accompanying drawing and two application examples of the utility model

One, folded formula Bicycle with one pair of additional wheels

This car is applicable to the elderly and disease, residual, weakling.The old man by bike, the back can carry small children, so be Bicycle with one pair of additional wheels.Certainly mother carry small children by bike also can, so have another name called mother and sons' car.

As shown in Figure 1, 2, 3, the same bicycle of this car first half, main car frame can utilize cycle frame, and schoolbag frame, is welded with hollow steel pipe.Two of schoolbag frame spikes 16 are made vertical direction in the main car frame.Quadrilateral connecting rod 7 both sides are hollow steel pipes, entangle rear wheel support one side for No. 16 while entangle spike.Rear wheel support can rotate front and back like this.The both sides, plane are equipped with rectangle right flank 2 and left wing 3 respectively on the schoolbag frame in addition; Be connected with schoolbag frame main body 1 with the steel interlinkage, can rotate up and down, rear wheel support is forwarded to midway location, make plane, trailing wheel place and main car frame plane parallel, latch 20 patchholes 21, grab 18 inserts slotted eyes 19, with spring pin 22 pinnings, use with quadrat method fixedly left rear wheel draw back state exactly, pull-off spring pin 22 can upwards be transferred to grab together with latch 20, trailing wheel is pushed away forward, make it to be close to main car frame, the left and right wing of schoolbag frame turns over downwards, being close to trailing wheel is the state of collapsing.

Transmission device, 10(is general by sprocket wheel).Minor axis 13(is special), axle shelves 11, axle bowl 12, universal-joint connecting rod 14 is formed.Left rear wheel 6 is a drive wheel.17(is special by axletree) be fixed on and use the universal-joint connecting rod to be connected in a pair of ball bearing of main shaft 15 with minor axis 13.Off hind wheel is equipped with brake disc, stone dead wire transmission, roughly the same bicycle.

Two, Foldable baby carriage

The Foldable baby carriage structure is similar with folding cycle for the old and young, just does size smallerly.With existing perambulator comparison advantage be that (1) can fold, (2) this car is a toy just, has certain practicality.Child can use 14 years old from five years old, as the vehicle.

Wherein, tap has been done change, makes a call to a hole in front fork 27 upper ends as shown in Figure 4, and tapping is loaded onto a head screw 26, makes a call to two holes 28,29 in handgrip 25 lower ends at a distance of 90 °, i.e. a front; A side.Prop up head screw in the time of by bike and withstand side opening, handgrip is vertical with the front-wheel plane, and handgrip half-twist during collection makes handgrip and front-wheel plane parallel.A whole like this car can be close to the wall limit or hang up.Because the perambulator bearing strength is little, only is with school bag not to be with too many goods.So above-mentioned schoolbag frame left and right is removed, finish by two locating dowel pins 30,31 and corresponding knock hole 33,34 location.Be that pull-up locating dowel pin 30,31 pushes away rear wheel support forward.Just collapsible; Rear wheel support is drawn outward backward, make quadrilateral connecting rod vertical with main car frame, trailing wheel plane and main car frame plane parallel are inserted knock hole with locating dowel pin, just become to draw back state.

Claims (1)

1. A kind of collapsible wheel fixing device, by main car frame, quadrilateral connecting rod, wheel stand and steady arm are formed, it is characterized in that the quadrilateral connecting rod both sides are welded with two steel pipes, a side is entangled main car frame, and opposite side entangles wheel stand one side, can relative to before and after rotate, on schoolbag frame and wheel stand, spring pin is housed wheel is fixed on the tram.

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