CN2579783Y

CN2579783Y - Improved front wheel driving bicycle

Info

Publication number: CN2579783Y
Application number: CN02283019U
Authority: CN
Inventors: 晁成功
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-10-13
Filing date: 2002-10-13
Publication date: 2003-10-15
Anticipated expiration: 2012-10-13

Abstract

The utility model relates to an improved front wheel driving bicycle, particularly to a common vehicle bicycle. An early front wheel driving bicycle is not easy to keep balance during ridding and is easy to lean forward because a front wheel is too big and has high barycenter. Safety bicycles generally used at present have the defects of long bicycle bodies, heavy weight, etc. The utility model is designed to solve the problems. The improved front wheel driving bicycle is designed in the mode that on the basis of early front wheel driving bicycles, the diameter of the front wheel is reduced, an acceleration fixed shaft gear train is used to accelerate, etc. The utility model has the advantages of simple structure, small size, easy riding, easy movement, easy placement, etc., and reduces manufacture working procedures and material consumption simultaneously.

Description

The improved type Frontwheel driven bicycle

The utility model relates to a kind of common traffic tool bicycle.

In the bicycle development course, a kind of Frontwheel driven bicycle once appearred, and a distinguishing feature of this car is front-wheel big (mainly being in order to obtain the speed of a motor vehicle faster) especially.Because front-wheel is big especially, the whole center of gravity of people, car is higher when driving, making rides is not easy to keep balance, and easily leans forward, so this bicycle is finally eliminated by people.Modern bicycle institute is the structure of a kind of being known as " safety-type " all over employing, the principal character of this kind bicycle is to adopt the arch bar truck that has standpipe, it is big that front-wheel guiding, back-wheel drive, front and back two-wheeled wheel footpath are less and common etc., and power transmission is finished by parts such as axis, sprocket wheel, chains.The weak point of this kind bicycle is: structure dislikes complicated slightly, vehicle body is oversize, is difficult for carrying and depositing.

In order to solve the shortcoming and defect of above-mentioned two kinds of bicycles, ad hoc meter the utility model " improved type Frontwheel driven bicycle ".

The advantage of the above two kinds of bicycles of the utility model bicycle system kneading, and increase some new technology essential factors and design.Concrete scheme is as follows:

Adopting the front-wheel guiding to hold concurrently drives, the propulsion mode that trailing wheel is driven, the front and back two-wheeled all adopts the wheel (710mm is following) than the steamboat footpath, crank is directly installed on the front wheel spindle, front wheel spindle is a stepped shaft, adopt bearing to connect between front fork and the front wheel spindle, power transmits and is finished by front wheel spindle and a fixed shaft gear train, this fixed shaft gear train also plays a part to quicken, suitably shorten the distance between the two-wheeled, adjust the structure of vehicle frame, make it to be satisfied with the requirement of load-bearing and anti-various impulsive forces, its basic configuration is a triangle, also can be other shapes of being derived by it.

Ben Che and aforementioned two kinds of bicycles are made comparisons in following interview:

A, compare with early stage Frontwheel driven bicycle, this car has easily and advantage such as drives, the speed of a motor vehicle is fast, be difficult for falling down, and this is because this car has adopted the wheel than the steamboat footpath, has reduced center of gravity, and has increased a cause of quickening fixed shaft gear train.

B, with modern people " the safety-type bicycle " of common employing compare, it is more succinct that this car has structure, small volume and less weight more, easily removes advantage such as Yi Fang, and this is because this car has been simplified vehicle frame, remove parts such as axis, chain, and shortened the cause of vehicle body.

The enforcement of these driving skills art scheme is very simple, slightly explains below in conjunction with accompanying drawing and an embodiment:

Description of drawings: Fig. 1 is the agent structure scheme drawing of a improved type Frontwheel driven bicycle; Fig. 2 is the cutaway view of bicycle front wheel spindle parts shown in Figure 1; Fig. 3 is that the A of bearing seat shown in Figure 2 and lid is not to view (for clarity sake, axle and bearing wherein draws).

The agent structure of present embodiment as shown in Figure 1, serve as reasons preceding pipe, back vent and one goes up the triangle that pipe formed and constitutes (also can be other shapes that derivation thus forms) its vehicle frame, saddle is fixed on the vehicle frame by standpipe, adopt bearing to connect between front fork and the front axle, crank is directly installed on the front axle.Fig. 2 is seen in the structure of each parts and installation on front axle and the front axle, as shown in the figure, front wheel spindle is the ladder axle, the both sides section diameter is smaller, the centre portion slightly larger in diameter, the both sides part is by being followed successively by the installation crank in outer the reaching, bearing and driving gear part, adopt pin to connect (also can the tenon connection of the side of employing) between crank and the front axle, adopt key connecting between driving gear and the front axle, adopt interference fit between bearing bore diameter and the front axle, Fig. 3 is seen in the design of bearing seat and lid, and bearing seat is permanently affixed at the front fork bottom, lid can freely take off or set up by bolt (also can be other fasteners), so that miscellaneous part is installed.The front axle centre portion is in for front axle is installed, and screw thread is carved with at these two ends, place, so that bearing assemblies such as retaining, bowl are installed.Link by pad or sleeve between each parts on the axle.Crank has the effect of each parts on the fastener shaft concurrently.Quickening fixed shaft gear train is made up of driving gear, dual gear and flywheel gear, wherein driving gear is keyed on the front wheel spindle, dual gear is fixed on inboard (the intensity palpus reinforcement of this side breeches pipe of a side front fork by a minor axis, when guaranteeing normal operation minor axis unlikely incline narrow), flywheel gear links by screw thread (or pin) and preceding axle body.The number of teeth of driving gear should be more than the number of teeth of driven gear.

The miscellaneous part of this car such as bicycle bell, brake etc., all identical with existing bicycle, or slightly adjust and get final product, all extremely simple again, for saving space, do not give unnecessary details one by one now.

Have only any to mention, promptly in the front-wheel back upper place, and trailing wheel front upper place etc. easily and the place of contact with clothing, should install safty shield additional.

It is firm attractive in appearance that the unit design of this car requires, light and flexible.

Claims

A kind of novel Frontwheel driven bicycle, it is characterized in that front and back wheel all adopts the wheel of 710mm with the lower whorl footpath, front wheel spindle is a stepped shaft, crank is directly installed on the front wheel spindle, and by the running of an acceleration fixed shaft gear train drive front-wheel, quicken fixed shaft gear train and constitute by driving gear, dual gear and flywheel gear, wherein driving gear is fixed on the front wheel spindle by key, dual gear is fixed on the inboard of a side front fork by a minor axis, and flywheel gear is fixed on one's body the front axle by screw thread or pin.