CN2050024U

CN2050024U - Portable bicycle

Info

Publication number: CN2050024U
Application number: CN88211990U
Authority: CN
Inventors: 张汉清
Original assignee: Individual
Current assignee: Individual
Priority date: 1988-07-04
Filing date: 1988-07-04
Publication date: 1989-12-27

Abstract

The utility model relates to a portable bicycle, whose rear fork is hinged with the rear end of a sleeve tube of the crossbeam; the rear fork can rotate retractably by 110 DEG around the hinging point, and the sleeve tube can expand and contract freely in the rectangular section tube of the crossbeam. The handle bar adopts a movable adjustable structure whose opening degree and shape can be adjusted arbitrarily within a certain range, and the complete bicycle envelope size of the portable bicycle can be shrunk to 690 (length) *690 (height) *220 (width) millimeters to the minimum. The transmission mechanism of the portable bicycle is composed of an increasing speed changer, a nylon belt and a pair of flywheels, which can effectively convert man power into the motive power of the portable bicycle, with no need of oil's being added for lubrication. The buffer and the damper which are installed on the rear fork and the hinging site of the bicycle frame can lower the vibration and bump of the moving portable bicycle, which makes people feel brisk and comfortable.

Description

Portable bicycle

The utility model can be foldable about a kind of vehicle frame and be utilized and increase the portable bicycle that change-speed box, nylon tape and round trip flight take turns transferring power.

Bicycle is a kind of walking-replacing tool that people generally use.Yet bicycle commonly used at present, its weak point is that overall dimensions of a car is long, and weight is too heavy.This is little or stay in and quite feel inconvenience the resident on the high building for living space.

For making bicycle micro-miniaturisation, lightness, constantly the someone proposes new design plan (as: CN85203017,85200761) both at home and abroad in recent years.But these new design plans are owing to failing to break away from traditional chain-driving mode and adopting suitable foldable version, so can not reach portable purpose eventually.

The purpose of this utility model is to provide a kind of back vent front end and crossbeam sleeve pipe rear end hinged, and back vent can be made the novel portable bicycle that about 110 ° of folding and unfoldings are rotated around hinge-point.

Another purpose of the present utility model provides a kind ofly comes the novel portable bicycle of transferring power by increasing the transmission device that change-speed box, nylon tape and round trip flight wheel forms.

The utility model is finished as follows.

The frame beam of bicycle is a rectangular section tube, and its front end links to each other with the carrying sleeve of front fork, handlebar.Seat and schoolbag frame are fixed in crossbeam sleeve pipe rear end top, schoolbag frame can around the hinge-point upset with put down after backrest overlaps, and be superimposed with the seat face.Sleeve pipe inserts in the rectangular section tube of frame beam, and can be in frame beam adjusting position.The rear end of back vent front end and crossbeam sleeve pipe is hinged, when will be with bicycle foldable, the back vent hinge-point can be done 110 ° rotation, and it is the shortest to regulate the crossbeam sleeve pipe simultaneously, and the envelope size of vehicle body is reduced.

The transmission device of bicycle by pedal stroke, increase change-speed box, nylon tape and the round trip flight wheel is formed, the two ends of nylon tape respectively with increase change-speed box and take turns with round trip flight and be connected.Under the manpower effect, increase rocking bar that change-speed box links to each other with pedal stroke do with pedal stroke before and after reciprocally swinging.Variable linear velocity and kinetic energy that nylon tape will increase gearbox output are delivered on the round trip flight wheel, by flywheel variable linear velocity is changed into speed variable and rotational energy again, thereby bicycle is travelled with proper speed, finished manpower and be converted into the dynamic process that bicycle advances.

The change-speed box that increases of the present utility model is the multiplication regulating mechanism that is made of pedal stroke, rocking bar, nylon tape and regulating control.Nylon tape is walked around the slide block of scalable multiplication factor, and adjusting slider can obtain various speedup rate, thereby can obtain various transmitting ratios, is adjusted in minimum speedup end when upward slope or contrary wind.The speed governing that increases change-speed box is to carry out in the scope of speedup, when its speedup amplitude is about no speedup one times, and speed governing can be divided into 10 or 20 grades even stepless change.It increases speed change degree characteristic and operating characteristic is well suited for bicycle.

The round trip flight wheel is similar to two flywheels on same axle.The shell of flywheel has two power troughs of belt on the outer garden, then adopts sheetmetal incense coil spring during answer.Noise when resetting in order to lower can change the palm tooth in the flywheel to be located at and flies in the shell to make it to be subjected to centrifugal force controlled during operation on the garden.

The place, top that this transmission device is installed on vehicle frame front end crossbeam rides down and hangs as pendulum, increases the right side that the speed change rocking bar places vehicle body, and both feet are as pendulum front and back reciprocally swinging during treadmill.

Portable bicycle of the present utility model is provided with Shock absorber at back vent and junction, frame beam sleeve pipe rear end, and Shock absorber is made up of spring bumper and air valve damper.Spring bumper is by component set-ups such as " V " shape laminated spring and blob of viscoses, and when vehicle body jolted, its power was given " V " shape laminated spring by the hinge transmission, absorbed momentum by " V " laminated spring.Consider vehicle body bounce-back, repeat to jolt and the sensivity of BMX (Bicycle Motocross) road pavement out-of-flat, thereby disposed air valve damper at the hinge place of vehicle frame and back vent.The similar leg-of-mutton can of air valve damper, " V " shape laminated spring is loaded in the box.Jolting of being produced when travelling changes the volume in the can, because movable lug is contained in the box chamber, hinge and is connected with crossbeam sleeve pipe rear end on jointed shaft, therefore when jolting, in cylinder, move up and down, play the absorbing quick effect that declines as piston.

Portable bicycle of the present utility model, its handlebar tube is inserted in the bend pipe, and the tube's axis of can going for a stroll rotates, and bend pipe is disposed in the short tube rotationally, thereby handlebar can be regulated its opening width and shape within the specific limits arbitrarily.Handlebar can be gone for a stroll the on demand during adjusting rotational of pipe is rotated bend pipe simultaneously in short tube, can be combined into various spatial geometric shapes like this.After being adjusted to suitable shape, just fix with the special fastener that is disposed on the handlebar.When Folding bicycle, then handlebar is turned to the below, and regulate the both sides opening width to minimum, so just can reach the purpose of contraction.

Below in conjunction with accompanying drawing the utility model is described in further detail.Accompanying drawing 1 is the front elevation of portable bicycle; Accompanying drawing 2 is handlebar regulating mechanisms; Accompanying drawing 3 is the constructionals drawing that increase change-speed box; Accompanying drawing 4 is round trip flight wheel scheme drawings; Accompanying drawing 5 is Shock absorber scheme drawings.

Frame beam 1 is a rectangular section tube, and its front end links to each other with the carrying sleeve 4 of front fork 2, handlebar 3, and seat 5 is fixed in above the rear end of crossbeam sleeve pipe 7 with schoolbag frame 6.Sleeve pipe 7 can freely stretch in frame beam 1, regulates vehicle body to suitable length.The rear end of the front end of back vent 8 and crossbeam sleeve pipe 7 is hinged, when will be with bicycle foldable, and can be with back vent around hinge-point O ₂Do about 110 ° rotation, make the envelope size of car load foldable to minimum.

Transmission device by pedal stroke 9, increase change-speed box 10, nylon tape 11, round trip flight wheel 12 is formed.Increasing change-speed box 10 is made up of A, B rocking bar, pulley 31, speed governing slide block 32 and speed regulating arm 33.The two ends of nylon tape 11 compress with increasing the dynamic trough bottom land that change-speed box 10 and round trip flight take turns on 12 shells respectively, and cw is around several circles.One end of nylon tape with increase change-speed box 10 and be connected before, to go here and there pulley 31 on the rocking bar into of living in (A or B) earlier, walk around the speed governing slide block 32 on the speed regulating arm 33 again after, be enclosed within speed regulating arm 33 enterprising O ₁On the one side bearing pin at place, another nylon tape method of attachment is identical.When people's both feet back and forth alternately step, when left foot steps pedal stroke 9,, make rocking bar A with pedal stroke 9 reciprocally swingings because pedal stroke 9 is connected with rocking bar A.Rocking bar B and pedal stroke 9 are integrated, so with the right crus of diaphragm reciprocally swinging.In rocking bar A, B when swing,, it is flexible that two nylon tapes 11 just have, stroke how much depend on slide block 32 positions on the speed regulating arm 33.Kinetic energy and variable linear velocity that nylon tape 11 will increase change-speed box 10 output are delivered on the round trip flight wheel 12, by round trip flight wheel 12 variable linear velocity and kinetic energy thereof are transformed into speed variable and rotational energy again, and bicycle is advanced.

Two flywheels of round trip flight wheel 12 are on same axis 17.A power trough of belt (seeing accompanying drawing 4) is arranged on the shell periphery of flywheel, adopt incense coil formula spring 18 during answer.Noise when resetting in order to lower, the palm tooth 19 in the flywheel change to be located on the clutch bell (sees accompanying drawing 4), makes it to be subjected to centrifugal force controlled during operation.

Back vent 8 is provided with spring bumper 20 and air valve damper 21 with the junction of frame beam sleeve pipe 7.Spring bumper 20 is made of " V " shape laminated spring 22 and blob of viscose 23.When vehicle body jolted, its power was passed to " V " shape laminated spring 22 by hinge 24, absorbed momentum by " V " shape laminated spring 22.Air valve damper 21 is like a leg-of-mutton can, jolting of being produced when travelling changes the volume in the can, because movable lug 16 is contained in the box chamber 25, be hinged on the jointed shaft 26, and be connected with the rear end of crossbeam sleeve pipe 7, similar piston moves up and down in cylinder when jolting, and plays the shock-absorbing quick effect that declines.

Handlebar tube 27 is inserted in the bend pipe 28, and the rotational of the pipe 28 of can going for a stroll, and bend pipe 28 is disposed in the short tube 29 rotationally.When the opening width of regulating handlebar and shape, as long as, simultaneously bend pipe 28 is rotated in short tube 29 with go for a stroll the on demand rotational of pipe 28 of handlebar tube 27.After being adjusted to suitable shape, just fixing with the special fastener 30 that is disposed on the handlebar 27.

Adopt portable bicycle of the present utility model, because back vent and frame beam sleeve pipe rear end are hinged, and can do folding and unfolding around hinge-point and rotate, and sleeve pipe can freely stretch in the crossbeam rectangular section tube; Handlebar can relatively rotate in bend pipe and short tube simultaneously, regulates its opening width and shape within the specific limits arbitrarily.Thereby after bicycle was foldable, it was long to 690(to contract the envelope size of car load) * 690(height) * 220(is wide) millimeter.

In addition, because the transmission mechanism of portable bicycle of the present utility model forms by increasing speed changer, nylon tape and free wheels, the drive disk assemblies such as chain that need not be conventional, chain wheel need not oilyly, thereby have greatly alleviated complete vehicle weight, and cleaning, light. Spring buffer and air damper that the back vent of bicycle and hinged place, crossbeam sleeve pipe rear end are set can greatly reduce the vibrations that take place in the Vehicle Driving Cycle way and jolt, and make the people feel brisk, comfortable in the time of by bike. Therefore, to can yet be regarded as be the walking-replacing tool of a kind of microminiaturization, lightness to portable bicycle of the present utility model.

Claims

1, a kind of portable bicycle of being made up of vehicle frame, handlebar, seat, front and rear fork, wheel and transmission device etc. is characterized in that frame beam is a rectangular section tube, and the sleeve pipe of crossbeam rear end can stretch in rectangular section tube; The rear end of back vent front end and crossbeam sleeve pipe is hinged, and can do about 110 ° of folding and unfoldings to crossbeam around both glue joints and rotate.

2, by the described portable bicycle of claim 1, it is characterized in that transmission device by pedal stroke, increase change-speed box, nylon tape and round trip flight wheel and form, the two ends of nylon tape respectively with increase change-speed box and take turns with round trip flight and be connected.

3, by the described portable bicycle of claim 1, it is characterized in that back vent and frame beam sleeve pipe junction are provided with spring bumper and air valve damper.

4, by the described portable bicycle of claim 1, it is characterized in that handlebar tube is laterally inserted in bend pipe, and the tube's axis rotation of can going for a stroll, and bend pipe is disposed in the short tube rotationally.