CN87214740U

CN87214740U - Portable bicycle

Info

Publication number: CN87214740U
Application number: CN 87214740
Authority: CN
Inventors: 徐达来
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-10-25
Filing date: 1987-10-25
Publication date: 1988-10-26

Abstract

The utility model discloses a portable bicycle, and a front wheel can be driven to advance by the casing of a flywheel after passing through the raising speed of a gear drive mechanism by adopting the drive of the front wheel, the steering of a river wheel and the rotation of the front shaft driven directly by a crank. Driving parts except the feet pedals and the crank are arranged totally in the casing of the front wheel shaft, and the utility model has the advantages of compact structure, simple operation and light weight; a back wheel is arranged on a double-supporting bracket, and the length after being folded only is about one half of the traditional 26 bicycle. The utility model also has the advantages of low centre of gravity and smooth and comfortable ride, and can be used for the condition of the town house or outgoing tour.

Description

Portable bicycle

The utility model relates to the improvement of bicycle.

Standard bicycle adopts pedal, and------sprocket wheel---chain---flywheel driver train has the operational space of crank up to crank between the front and back wheel, thereby the front and back wheel wheelbase of standard bicycle all has about 1 meter, and the liftoff height of saddle has also been had an appointment 1 meter.So the car body of standard bicycle is long, center of gravity is high, structure is not compact, is not suitable for the out on tours of town house conditioned disjunction and uses.

The utility model is to aim at the town house condition to use and design-calculated.Be characterized in adopting f-w-d, rear-axle steering, crank is installed in direct drive front axle rotation on the front axle, drives front-wheel by flywheel casing and advance after the gear drive raising speed, and the part except that pedal, crank all is contained in the front-wheel axle housing.

Another characteristics of the present utility model are that trailing wheel adopts less wheel footpath, and are directly installed on two support supports.Just collapsible through shirtsleeve operation (operational motion that is equivalent to the standard bicycle support) when parking, the length of bicycle can shorten to below 1 meter, and structure is quite compact, uses so be well suited for the out on tours of town house conditioned disjunction.

Embodiment of the present utility model: front-wheel adopts 20 ", trailing wheel adopt 16 " wheel footpath, 0.72 meter of wheel base, the clearance length when parking are 0.94 meter, than 26, and " standard bicycle has shortened half, about 13 kilograms of gross weight.The saddle of present embodiment is provided with backrest, the rider is sitting on the saddle to the front lower place to pedal, can give play to bigger propulsive effort by the counteraction of backrest, so its speed is faster than standard bicycle, add that the car load center of gravity is lower, so riding safety is comfortable.Present embodiment is particularly suitable for making plastic bicycle.

Fig. 1, Fig. 2 are the scheme drawings of parking with riding condition of the present utility model.As shown, the utility model mainly is made up of front-wheel (1), pedal (2), crank (3), direct drive unit (4), handlebar (5), vehicle frame (6), steering hardware (7), saddle (8), catch gear (9,17), two support support (10), trailing wheel (11).

(I design direct drive unit (4), apply for a patent separately) bolt up is on the front fork fishplate bar of vehicle frame (6), with the bicycle general-duty keep off up and down, bowl and steel ball are fixed on the middle part and the rear portion of vehicle frame (6) with connection pipe (21) and standpipe (16) up and down, connection pipe (21) and standpipe (16) can be around its dead axle rotations.

Fig. 3 is seen in analysing and observe of trailing wheel fold mechanism: two support supports (10) are welded into steel pipe, folding position iron plate of each bag weldering is done the supporting of axle (18) in the left and right support of support, anchor plate (12,15) is welded on the support (10), standpipe (16) lower end weldering one section reinforced pipe (19), axle (18) couples together support (10) and standpipe (16), support (10) can rotate around axle (18), anchor plate (12,15) can limit the angle that two support supports (10) rotate around axle (18), and plays supporting role.Anchor plate when riding (15) is bearing on the standpipe (16), and the inwall of anchor plate when parking (12) is bearing on the standpipe (16).

The catch gear of being made up of locking plate (9), lock shaft (13), supporting iron (14), lock handle (17) and tension spring is installed on the standpipe (16).Locking plate (9) and lock handle (17) are with being welded on the lock shaft (13), and lock handle (17) drives locking plate (9) and rotates.It is locking state that lock handle (17) is dialled backward, and dialling forward is to remove locking state.The upper limb locking of anchor plate (12) is withstood in locking in the slotted eye of the interior hook insertion anchor plate (12) of locking plate when parking (9) by the lower edge of locking plate (9) when riding.Under the effect of tension spring, mechanism all can self-locking when riding or park.

Fig. 4 is the cutaway view of steering hardware.As shown, screwing a heart screw mandrel (20) can fuse handlebar (5), connection pipe (21) and fork (22), roller (23) is housed on the fork (22), is processed with long slot bore on the fork (24) and is welded on the standpipe (16), roller (23) can move in long slot bore.Handlebar (5) drives fork (22) swing by connection pipe (21), stirs fork (24) by the roller (23) on the fork (22) and rotates, thereby reach the purpose of controlling rear-axle steering.In this steering hardware, turn to and the turning to of trailing wheel of handlebar are opposite, and this has just in time offset the rear-axle steering influence opposite with turning of bicycle, have adapted to people and have ridden the custom that standard bicycle turns to.

Claims

1, a kind of portable bicycle is made up of actuating device (4), front-wheel (1), pedal (2), crank (3), handlebar (5), vehicle frame (6), steering hardware (7), saddle (8), catch gear (9), (17) etc.It is characterized in that rear wheel support (10) and standpipe (16) kink are at the last hinges of forming of axle (18), it is folding that rear wheel part can be rotated around axle (18), the anchor plate (12,15) that is welded on the rear wheel support is bearing in respectively on the standpipe (16), has limited the angle that rear wheel part rotates around axle (18).

2, bicycle according to claim 1 is characterized in that being equipped with on the standpipe (16) catch gear of being made up of locking plate (9), lock shaft (13), lock handle (17) and tension spring etc.Locking plate (9) and lock handle (17) all are fixed on the lock shaft (13), drive locking plate (9) by lock handle (17) and rotate.

3, bicycle according to claim 1, it is characterized in that in the said steering hardware, screwing a heart screw mandrel (20) is connected as a single entity handlebar (5), connection pipe (21) and fork (22), be contained in slotted hole interior drive fork (24) swing that the roller (23) on the fork (22) inserts fork (24), an end solid welding of fork (24) is on standpipe (16).