CN2430349Y

CN2430349Y - Four wheel bicycle frame

Info

Publication number: CN2430349Y
Application number: CN00236141U
Authority: CN
Inventors: 铁锋
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-06-06
Filing date: 2000-06-06
Publication date: 2001-05-16
Anticipated expiration: 2010-06-06

Abstract

The utility model discloses a beam frame for a four-wheel bicycle. A beam frame is provided with three longitudinal beams, and the middle parts of the longitudinal beams at both sides are bent in a step shape. A front cross beam is vertically connected with the front ends of the three longitudinal beams, and both ends of the front cross beam are bent backwards and connected with a sleeve pipe of a front shaft. One end of a strengthening member is connected with the sleeve pipe of the front shaft, and the other end is connected with an edge beam. A middle cross beam arranged at the upper layer and a rear cross beam are vertically connected with the longitudinal beams arranged at the two sides to serve as a bottom frame for a carriage. The beam frame of a four-wheel bicycle forms an integral frame structure, and therefore, the purposes of strengthening the beam frame structure, simplifying the bicycle conformation, reducing the number of components, reducing the size of the bicycle body and lightening the weight of the bicycle body are achieved. One person can drive the bicycle easily.

Description

The quadricycle roof beam structure

The utility model relates to a kind of quadricycle roof beam structure.

China is bicycle big country, and the Bicycle shape of production is various.But be two-wheeled and three-wheel vehicle mostly, quadricycle is then very rare.According to data retrieval, quadricycle or sedan-type cycle have tens kinds to patent.

Wherein with the utility model comparatively approaching be:

" quadricycle " that CN87216569U announces;

" tandem bicycle " that CN2104812U announces;

" quadricycle " that ZL89207386.1 announces;

" quadricycle " that ZL91208869.9 announces;

" the four-wheel tandem bicycle " that CN2159931Y announces;

" a kind of light quadricycle " that CN2189109Y announces;

" the chair type quadricycle " that CN2340674Y announces;

" the two many people of driving of the four-wheel rickshaw " that CN2185232Y announces etc.

These quadricycles drive design by double or many people mostly, and some also increases mechanically aided device.This mentality of designing causes vehicle design inevitable roomy, and mechanism is many and complicated, and then causes car body heavier, the difficulty of riding.

According to data retrieval, in most of acquired patents, beam frame structure is not provided detailed design.In fact whether the beam frame structure of quadricycle is reasonable, is vital to the feasibility of quadricycle.Because if the roof beam structure design is unreasonable, at first caused the car body super-long and super-wide, structure member repeats the overweight corollary that just becomes of car body is set.Because car body is heavy, the power that needs to drive must increase, and a plurality of driver trains will be set for this reason.The repeating of driver train is provided with, and when making mechanism's trend complicated, car body weight increased.The second, car body is overweight, though can solve by increasing driver train, many people application of force or increasing the Mechanical Driven mode, quadricycle is not that always many people drive when riding, even when many people drive, also not necessarily the somebody of institute can both help to drive.Such as other riders is disabled person, child or the elderly.They can do nothing to help when driving, and how could this car drive by a people? and increase driving engine as actuating device, break down or how the energy drives when using up at driving engine? conclusion is to drive very difficulty.The 3rd, in order to hold a plurality of actuating devices, car body must need enough length and width.The car body of super-long and super-wide clearly is unsuitable for the requirement of arteries of communication, in roading, unpowered vehicle travels and is with generally is not very wide, if and the data that provide in the design that quadricycle resembles " long 3.2m, wide 1.8m ", the floor area that this is equivalent to a roadlice or six two wheel bicycles clearly is irrational.

Therefore, the manpower driving has all been run counter in the design of most of quadricycles needs little, the lightweight basic point of departure of volume.

The purpose of this utility model provides a kind of roof beam structure of quadricycle, under the prerequisite that keep to adopt seat and single driving, solve the unreasonable and super wide overlength of beam frame structure complexity, car body that cause of present quadricycle design, weight big, need problem such as many people's drivings.

For achieving the above object, quadricycle roof beam structure of the present utility model is by longeron, crossbeam, and forward and backward pedestal, seat frame constitutes.Adopt three longeron arrangement in parallels, both sides longeron middle bent is stairstepping, intermediate longitudinal girder rear portion K/UP, and two limit longerons outwards expand the longeron rear portion around himself anterior Y suitably rotation laterally.Front cross rail and three vertical connections of longeron, front cross rail two ends are crooked backward and is connected with the front axle sleeve pipe, and the reinforcing member two ends join with front axle sleeve pipe and limit longeron respectively, at both sides longeron outside formation front axle bracket.Abducent both sides, rear portion longeron, the anglec of rotation is determined according to the back shaft length.The two ends of the anterior crossbeam in upper strata are connected by abducent size with the both sides longeron, and place the place ahead of side bar curve.The two ends of upper strata middle beam are connected with the both sides longeron is vertical, and after cross member is connected with the rear end of both sides longeron is vertical.The anterior vertically frame of seat bracing frame is on the anterior crossbeam in upper strata and be attached thereto, and an end is connected with the upper strata middle beam.The upper end of rear axle support is connected with limit longeron lower rear.

Adopt said structure, its front cross rail partly plays the effect of front axle bracket.Simultaneously, the front cross rail two ends are crooked backward, and the front axle bracket position is moved backward, and then front-wheel also moves backward, has shortened the length of car load.Both sides longeron bending is stepped, make its rearward height and seat bracing frame and compartment at the bottom of height adapt, limit longeron, upper strata middle beam and after cross member are that the main beam structure parts are simultaneously as the part of compartment bottom rectangle framework.Integrated measure like this makes beam frame structure firm, has simplified car construction, has reduced number of components, thereby has reached the purpose of dwindling vehicle volume and expendable weight.

Be described in further detail below in conjunction with the embodiment of accompanying drawing the utility model quadricycle roof beam structure:

Fig. 1 is the three-dimensional view of the utility model quadricycle roof beam structure;

Fig. 2 is the lateral plan of the utility model quadricycle roof beam structure, for the purpose of understanding conveniently, other parts of quadricycle is drawn in the lump;

Fig. 3 is the front elevation of the utility model quadricycle roof beam structure;

By shown in Figure 1, the middle longeron (1) that the utility model quadricycle roof beam structure has a rear portion upwards to bend up, the both sides longeron (2) of arrangement in parallel with it, both sides longeron middle bent is stepped, article two, the limit longeron outwards expands the longeron rear portion around himself anterior Y suitably rotation laterally.Front cross rail (4) and three vertical connections of longeron front end, the two ends of front cross rail are crooked backward and is connected with front axle sleeve pipe (9), reinforcing member (10) one ends connection front axle sleeve pipe (9), and other end connection side longeron (2), the shape style of this reinforcing member is not limit.Lower floor's center member (5) and three vertical connections of longeron, all can above or below longeron in its position.The vertical connection of termination that the anterior crossbeam in upper strata (6) and middle longeron (1) upwards bend up, the two ends of upper strata front portion crossbeam (6) are connected by abducent size with the both sides longeron, and place the place ahead of side bar curve.The two ends of upper strata middle beam (7) and vertical connection of both sides longeron (2), the vertical connection of rear end of after cross member (8) and both sides longeron (2).The anterior vertically frame of seat bracing frame (3) is gone up and is attached thereto in upper strata front portion crossbeam (6), and an end is connected with upper strata middle beam (7).The upper end of rear axle support (11) is connected with limit longeron (2) lower rear.

From structure shown in Figure 1, three longerons are connected with five crossbeams, make all force parts of roof beam structure of the utility model quadricycle, all owing to having crossbeam and combining of longeron to make suffered power be disperseed to bear by each parts, so integral structure is very firm.Its front cross rail (4) not only plays the effect of structure girder framework as crossbeam, recurvate two ends become the component part of front axle bracket simultaneously.Front axle bracket than the independent quadricycle that is provided with of propons crossbeam is simple in structure, and front axle bracket is moved backward, and front-wheel is also corresponding to be moved backward, has dwindled car load length.Limit longeron middle bent is stepped, the platform that makes the longeron rear portion become a height and seat bracing frame and compartment under(-)chassis to adapt with beam structure, behind limit longeron, the top center member and after cross member be the main beam structure parts again as the component part of compartment under(-)chassis, make the quadricycle roof beam structure form the integrated frame structure.Thereby reached beam frame structure firmly, simplify car construction, reduce number of components, dwindle the car body size, alleviate car body weight and the single purpose that can easily drive.

The utility model is not limited to above-mentioned embodiment, no matter do any variation on its shape or structure, three longerons of every employing and both sides longeron bending are stairstepping; Or the front cross rail two ends are crooked backward and connect the front axle sleeve pipe; Or upper strata crossbeam and both sides longeron are vertical is connected quadricycle roof beam structure as compartment bottom rectangle framework all within the utility model protection domain.

Claims

1, a kind of quadricycle roof beam structure comprises longeron, crossbeam, and the front and back pedestal, seat frame constitutes, and it is characterized in that: three longerons are arranged, intermediate longitudinal girder (1) rear portion K/UP, both sides longeron (2) middle bent is stairstepping; Front cross rail (4) and three vertical connections of longeron, front cross rail two ends are crooked backward and is connected with front axle sleeve pipe (9), and reinforcing member (10) two ends join with front axle sleeve pipe and limit longeron respectively, at both sides longeron outside formation front axle bracket; Upper strata middle beam (7) two ends are connected with the both sides longeron is vertical, the vertical compartment under(-)chassis that connects and composes with longeron rear end, both sides of after cross member (8).

2, according to claim 1 described quadricycle roof beam structure, it is characterized in that: two limit longerons (2) are around himself anterior Y suitably rotation laterally, the longeron rear portion is outwards expanded, abducent longeron rear portion and upper strata middle beam (7) and after cross member (8) constitute the compartment under(-)chassis, and the both sides longeron anglec of rotation is determined according to the back shaft length.