CN1117455A

CN1117455A - Bicycle incorporating bifurcated frame

Info

Publication number: CN1117455A
Application number: CN94115724.5A
Authority: CN
Inventors: 约瑟夫·E·库哈维克; 托马斯·E·李
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-08-26
Filing date: 1994-08-26
Publication date: 1996-02-28
Anticipated expiration: 2014-08-26
Also published as: CN1045269C

Abstract

The bicycle has a pair of frames. The front frame includes front fork, front wheel, handle and seat. The rear frame includes crank component, pedal component, rear stay and rear wheel. A shock-absorber is mounted between the crank component and the seat, and elastically links the front and rear frames. The link point can be changed, thus changing the rigidness of the frame to compensate the load applied on the seat.

Description

The bicycle of band bifurcated vehicle frame

The present invention relates to a kind of suspension system of two-wheel car in general, relates in particular to a kind of like this vehicle, and it has adopted dichotomous frame section, and an elastic clutch is installed between these frame sections.

Prior art discloses the multiple design of relevant bicycle, light motorcycle and similar vehicles, and all these designs all attempt to provide adjustable draft hitch.Should be understood that, although the present invention applicable to the sulky vehicle of any kind, as serve exemplary purposes, the present invention will be described with regard to bicycle.

All intrinsic problem in the bicycle structure relates to the ability and the operating characteristic of suspension or vibration damping.The disclosed a kind of battery-operated motor cycle of prior art provides the bifurcated of rigid coupling vehicle frame between forward and backward.In order to make suspension stable, between forward and backward, one vibration-damped component is installed in the below of the diagonal pillar of seat and after-frame.The intrinsic problem of this design-calculated relates to it and is not suitable for bicycle.This is because side arm is to be connected on a fixed position with after-frame, thereby can not provide any device to make the suspension outage.

A bicycle must include and make the suspension outage when Pedalling, and can allow the device of its activity when user on irregular terrain does not rotate pedal.In order to address this problem, the present invention provides a kind of axle interlink of regulating selected between side arm and after-frame.By regulate before this, structure between after-frame connects, and can change the orientation of vibration-damped component with respect to the axis of crank and pedal.In addition, by changing the axis of movement of vibration-damped component, also can change into the required power of movable suspension.

Provide such forward and backward in the disclosed another kind of device of prior art, they are contiguous by the pivot center that the pivot form is directly connected to crank one pedal assembly.Before this, between the after-frame,, be connected with a horizontally disposed vibration-damped component in the place ahead of seat support.When before this, after-frame according to ground, below mutually relatively when pivot changes the position, vibration at this moment just for this reason the elastic clutch of vibration-damped component absorb.This design has typically reflected intrinsic in bicycle structure problem.When bicycle use bifurcated vehicle frame during, just must prevent that pedal from contacting with ground as vibration insulating system a part of.Back one phenomenon generally is called " pedal reduction ".This problem is independent of trailing wheel and just can takes place when deflecting from vertical direction when the crank-pedal assembly that rotates.

In the described this device of prior art, side arm and after-frame are to rotate around a point that is positioned at this crank assemblies rear, and make this crank and rotating pedal assembly vertically change the position with respect to the trailing wheel axis.If crank-pedal assembly is excessive with respect to the vertically change amount of position of trailing wheel, then the problem of pedal reduction will take place.The present invention utilized a kind of can be with respect to the after-frame of trailing wheel position stability crank-pedal assembly, solve the problem that this pedal reduces.Because the present invention has utilized the pivot coupling spare between side arm and after-frame, and the latter is the place ahead that is positioned at vibration-damped component, thereby just can avoid taking place the problem that pedal descends fully.

The present invention has solved and has carried over open question in the prior art by the side arm of change bicycle and the mode that interconnects of after-frame.This bicycle comprises a bifurcated chassis assembly.Side arm comprises front fork and front-wheel, handle and steering assembly and seat.This seat is connected on the steering assembly by the inclined bearing pipe that push pipe and extends before and after thus that shakes.There is a back plate that above-mentioned inclined bearing pipe is fixed on the steering assembly.After-frame is generally triangular in shape, comprises crank and the postbrachium of pedal assembly, extension, coaxial backstay and center stay and trailing wheel.Crank assemblies then is connected on the place ahead terminal point of center stay by a lower oblique tube.Forward direction intersection point place between center stay and lower oblique tube pivotally is attached to after-frame on the back plate of side arm.Between the center stay of after-frame is with the intersection point of backstay and side arm inclined bearing pipe, a vibration-damped component is installed.Be installed in the position of the vibration-damped component upper end on the inclined bearing pipe by adjusting, can regulate suspension and compensate the power (being cyclist's weight) that is applied on the bike saddle.By changing the position of pivot coupling spare between forward and backward, just can change the power that makes damping suspension movable required, just can improve the operating characteristic of bicycle thus.

Basic conception of the present invention is a kind of bicycle that is branched into side arm and after-frame.Side arm generally comprises front-wheel, front fork, handgrip and steering assembly and seat.After-frame generally comprises crank and pedal assembly, backstay and trailing wheel.The present invention be by this forward and backward structure and before this, the interconnection mode of after-frame realizes.

The seat of this bicycle is connected on the steering assembly by a horizontal jacking pipe that extends in the centre.Have an oblique support tube generally to extend from the place ahead of seat pillar, the end of this support tube then provides the back plate of a selectable pivot point to be connected on the steering assembly between forward and backward by one.

After-frame comprises a member triangular in shape basically.Crank and pedal assembly then are in the extension arm face and the trailing wheel connection of each side of trailing wheel by a pair of branch.There is a center stay rearward to stretch into vertically between the backstay that a pair of branch is in each side of trailing wheel.There is a vertical preceding stay crank-pedal assembly to be connected to the intersection of central stay and backstay again.In addition, still there is a lower oblique tube crank and pedal assembly to be connected to the end of the forefront of central stay.

After-frame connects with side arm on mounted panel rotationally.In the central stay of after-frame and the intersection of lower oblique tube, be formed with a pivot connector, it will be defined as movable suspension and the power of need usefulness.In this frame connecting piece and pass angle between the vertical plane surface at front-wheel center, must not be above 60 °.In order to carry out vibration damping, between the inclined bearing pipe of the center stay that the Flexible Connector of a vibration-damped component form is installed in after-frame with the intersection point of backstay and side arm.Installation site, selected top can be used to compensate the weight that is applied on the vehicle seat between this shock absorber and inclined bearing pipe, just can regulate the rigidity of suspension thus.

First purpose of the present invention is to provide a kind of improved structure for bicycle.

Second purpose of the present invention is to provide for bicycle a kind of bifurcated vehicle frame of energy improvement characteristic.

The 3rd purpose of the present invention is to provide a kind of like this cycle frame, and it can keep a fixed relationship that the suspension that can regulate is provided simultaneously between pedal assembly and trailing wheel.

The 4th purpose of the present invention be to provide a kind of can be easy with cheap improvement of making cycle frame.

Describe the current genus illustrated embodiments of the present invention below in conjunction with accompanying drawing with way of example, therefrom can understand better: it is believed that on structure and method of work to become the features of novelty of feature of the present invention, and other purpose and advantage of the present invention.Should be realized that at this these accompanying drawings just are used to illustrate and describe purpose, and are not to be used for limiting scope of the present invention.

Fig. 1 is the lateral plan of the bicycle that is configured to according to the present invention.

Fig. 2 is the transparent view of side arm of the present invention shown in Figure 1.

Fig. 3 is the transparent view of after-frame of the present invention shown in Figure 1.

Fig. 4 is the enlarged drawing of the pivot coupling spare between side arm of the present invention and after-frame.

Fig. 5 is by 5-5 lines intercepting among Fig. 4, the drawing in side sectional elevation of the pivot coupling spare between between side arm of the present invention and after-frame.

Fig. 6 is an enlarged drawing, illustrates the vibration-damped component between between side arm of the present invention and after-frame.

Referring to Fig. 1,2 and 3, when being expressly understood the bifurcated chassis assembly that is used for structure of the present invention.Bicycle of the present invention includes a side arm 8 and an after-frame 9, and they are attached to comes together to realize purpose of the present invention.Side arm 8 comprises front fork 12, front-wheel 10, handle assembly 13, steering assembly 14 and seat 15.Between this steering assembly 14 and a seat pillar 16, be fixed with a push pipe 17.With respect to this push pipe 17 inclined bearing pipe 18 that extends back forward.By an orientation angle fagging 19, keeping the structure integrity of side arm 8 with push pipe 17,16 one-tenth planar alignment of inclined bearing pipe 18 and seat pillar.The back will be described in detail to, have a collection of hole 20 along side direction by corner plate 19 and to be located at its base contiguous, in order to selectively an elastic clutch is installed between side arm 8 and the after-frame 9.Pivot regulating plate 21 with push pipe 17 and diagonal ligament pipe 18 coplanes is installed between the front end of inclined bearing pipe 18 and steering assembly 14.The back will be described in detail to, but this pivot regulating plate 21 defines one by many alternate selection, is able to make the passage of accepting that pivoting bonded assembly hole 22a, 22b or 22c defined with after-frame 9.

Referring to Fig. 3, can understand fully the structure of after-frame 9 better.The section of after-frame 9 is generally triangular in shape, includes crank assemblies 25 and pedal assembly 26, and the axis 27 that these two assemblies can wind perpendicular to bicycle rack of the present invention rotates.The a pair of

back extension arm

29 and 30 that extends back from the foot pedal cover 31 of pedal assembly 26 is arranged, and they divide each side that is in trailing wheel 11.Protrude upward a preceding stay 33 from covering 31.What concern with the backstay 35 that extends and 36 one-tenth axis is a central stay 34.Backstay 35 is fixed on the extension arm 29 of back, and backstay 36 is fixed on the extension arm 30 of back.Central stay 34 foremost with the linking to each other foremost of lower oblique tube 37.Central stay 34,

backstay

35 and 36,

back extension arm

29 and 30, preceding stay 33 are generally determined a public plane with lower oblique tube 37.The back will be described in detail to, and has a collection of

hole

38a, 38b and 38c to dispose in the hinged joint mode that the fulcrum by central stay 34 and lower oblique tube 37 extends forward, and they have constituted can make after-frame 9 be rotatably connected to device on the regulating plate 21.From central stay 34 a pair of upwardly extending parallel flange 39 is arranged, they can be used to install a back with the elastic clutch that describes in detail.

Referring to Fig. 4 and the 5 pivot coupling spares that can understand better between side arm 8 and after-frame 9, this joint piece is formed on the pivot regulating plate 21.Clearly illustrate that as Fig. 5 this pivot regulating plate 21 has constituted a passage between a pair of parallel plate that separates 44 and 45, all be provided with through hole 22a, 22b and the 22c of a collection of collimation on every block of parallel plate.As mentioned above, central stay 34 and lower oblique tube 37 intersection point the place aheads is provided with a collection of through

hole

38a, 38b and 38c on the extension flange on this lower oblique tube 37.Hole 38a, 38b and 38c determine some selective positions, make among after-frame 9 on such position can be rotatably connected on the pivot regulating plate 21 hole 22a, the 22b of that group collimation and 22c one.In order to change the pivot coupling between side arm 8 and the after-frame 9, can constitute a connection piece 46 to arbitrary group among

hole

22a and 38a, 22b and 38b or 22c and the 38c.Fig. 5 has shown a kind of representative type attaching parts 46, and it can make after-frame 9 rotate with respect to regulating plate 21.

As mentioned above, one object of the present invention is to provide a kind of device, the bicycle user can be regulated allow the condition of suspension activity.In general, be not wish to allow the suspension activity when the user is pedaled bicycle.But when by rugged ground of driving, people by bike will erect usually on pedal or give the pedal reinforcing, and the suspension of this bicycle just will absorb vibration thereupon.That straight hole in groups 22 of approval provides and makes after-frame 9 energy relative to selective position that side arm 8 rotates with 38.By making different selections in the hole group 22 that after-frame 9 and side arm 8 is done connect with 38, the cyclist just can regulate the condition that makes the suspension activity.But the angle of inclination 50 between the pivot coupling spare of 9 of vertical plane surface by front-wheel 10 centers and front-wheel 8 and trailing wheels must not be above 60 °.

Another object of the present invention is to be provided for the suspension system of dichotomous bicycle rack, and it can improve the traveling comfort and the operating characteristic of this kind bicycle.Referring to Fig. 6, wherein show the enlarged drawing of understanding this suspension system.As previously mentioned, after-frame 9 is rotatably to connect mutually with side arm 8 on pivot regulating plate 21.After-frame 9 and the relative motion of side arm 8 in car travels are subjected to the control of an elastic clutch, and this plunging joint is got the form of a kind of shock absorber 55 that is connected 34 of corner plate 19 and central stay.This shock absorber 55 generally includes a traditional hydraulic damper 56 and piston 57, and one is wound on this damper 56 and is included in pressure disc spring 58 between limited part 59 and 60.Shock absorber 55 is between corner plate 19 and central stay 34, and damper 56 is fixed in by on one in a collection of hole 20 of corner plate 19, and piston 57 then is installed in between the central stay 34 upwardly extending a pair of flanges 39.

When the ground-surface condition causes after-frame 9 to rotate with the mode of the spacing of central stay 34 to shorten push pipe 17 with respect to side arm 8, disc spring 58 will be compressed.When this causes the condition of compression to disappear, disc spring 58 just will stretch until the static state that reaches it.The effect of vibration-damped component 55 is to have formed an elastic clutch, and it is slowing down the vibration that pavement conditions causes.

Another purpose of the present invention has been to provide can regulate the ability that suspension compensates cyclist's body weight.In order to realize this purpose, the lower edge vicinity on corner plate 19 is provided with a collection of hole 20, and each hole provides a selectable point for connecting shock absorber 55.Regular meeting makes submissiveization of suspension when the place ahead of corner plate 19 connects vibration-damped component 55.As inference, connect the rigidity that vibration-damped component 55 just can increase suspension along the rear of corner plate 19.

The invention provides a kind ofly all has significantly improved bicycle in operating characteristic and suspension performance.Can make vibration-damped component 55 change it to be connected to the ability of the position of side arm 8 suspension rate that adapts with regard to adjustable energy saving and cyclist's body weight with respect to it by providing.Because can change after-frame 9 can be with respect to the position of the fulcrum of side arm 8 rotations, the cyclist just can select to make the condition of suspension activity.So the present invention has made significant improvement to prior art.

Claims

1. bicycle, this bicycle comprises:

(a) side arm, it has the steering assembly that is attached on the front-wheel; Be used for supporting cyclist's seat; Be fixed on the push pipe between seat and steering assembly; The support tube that is installed on the push pipe and extends from it towards front and back; Be fixed on the pivot plate between support tube and steering assembly, it has a collection of through hole that is configured to steering assembly from support tube forward; And a corner plate with top margin and base is arranged, this top margin is fixed on push pipe and the support tube, comprises a collection of contiguous collimation on its base simultaneously and separated through hole;

(b) after-frame, it has a crank and a pedal assembly that comprises crank cap, and this assembly rotatably is attached on the trailing wheel; From first and second postbrachium that crank cap extends back, they divide each side that is in trailing wheel; The preceding stay that is fixed on the crank cap and extends upward from it; Be fixed on the preceding stay and a pair of backstay that extends back, each backstay is connecting corresponding postbrachium on trailing wheel; A central stay before being fixed on stay and the backstay, and an extension that is fixed on this central stay and stretches forward;

(c) be used for making the extension of said after-frame and aforementioned pivot plate make the rotatably device of connection by a position in this batch hole of above-mentioned pivot plate setting; And

(d) be used for slowing down the springing of relative motion between side arm and the after-frame, this springing is bound up between the corner plate of the central stay of after-frame and side arm.

2. bicycle as claimed in claim 1, be characterised in that: said springing comprises that one has the liquid-springing spare of top and bottom, above-mentioned bottom is fixed on the central stay, and the top then is fixed on the position at a place in the contiguous set a collection of through hole in base on the said corner plate.

3. bicycle as claimed in claim 1 is characterised in that: said after-frame comprises that also one is fixed on the lower oblique tube between crank cap and extension and the central stay intersection point, and this after-frame is attached on the aforementioned pivot plate at lower oblique tube and central stay intersection point the place ahead.

4. bicycle, this bicycle comprises:

(a) front-wheel and a trailing wheel;

(b) side arm, it has a steering assembly that is attached on the front-wheel; Supporting cyclist's seat; Be fixed on the push pipe of seat and steering assembly; Be fixed on this push pipe and from it forward with the support tube that extends back; Be fixed on the pivot plate between support tube and steering assembly, this pivot plate has at least three from the support tube mutual pivot connector of tumbler forward; And the corner plate with top margin and top, the end, this top margin is fixed on push pipe and the support tube, and while base neighbor configuration on this corner plate has the hole of a collection of collimation that separates mutually;

(c) after-frame, it has the crank and the pedal assembly that comprise a crank cap, and this assembly is attached on the trailing wheel; From first and second postbrachium that above-mentioned crank cap rearward extends, they divide each side that is located at trailing wheel; Be fixed on this crank cap and from it upwardly extending before stay; Be fixed on the said preceding stay and a pair of backstay that extends backwards, each backstay is connecting a corresponding postbrachium on trailing wheel; The central stay of also extending forward thus on stay and the backstay before being fixed in; And a lower oblique tube that is fixed between central stay and the crank cap, the part of this lower oblique tube projects into outside the central stay, and has at least three three pivot connectors that are configured in above it;

(d) be used in the pivot connector of pivot plate and lower oblique tube one, after-frame is rotatably connected to device on the side arm; And

(e) be used for slowing down the springing of relative motion between side arm and after-frame, this springing is bound up between the corner plate of the central stay of after-frame and side arm.

5. bicycle as claimed in claim 4, be characterised in that: said springing comprises that one has the liquid-springing spare of top and bottom, this bottom is fixed on the central stay, and the top then is fixed on the position at a place in the contiguous set a collection of through hole in base on the aforementioned corner plate.