CN1480371A

CN1480371A - Reciprocating footoperated bicycle with dual flywheels

Info

Publication number: CN1480371A
Application number: CNA021336970A
Authority: CN
Inventors: 傅星源
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-09-03
Filing date: 2002-09-03
Publication date: 2004-03-10

Abstract

A reciprocating pedal type dual-flywheel bicycle able to run backward is composed of frame, saddle, handlebar, front and back wheels, left and right pedals, left and right overriding clutches, eccentrical and sectoiral left and right drive flywheels, and drive chain which is engaged sequentially with left drive flywheel, left overriding clutch, inertial wheel on frame, right overriding clutch and right drive flywheel. Its advantages are high speed and reliability, and long service life.

Description

Reciprocating footoperated bicycle with dual flywheels

Technical field

The present invention relates to the bicycle in the communications and transportation, particularly reciprocating pedal drives and the bicycle and man that can move backward.

Background technology

Existing bicycle, by vehicle frame, saddle, bogie car handle, front vehicle wheel and rear wheel, the left and right sides pedal of the rod of the progressive rotation type that connects to ground, be fixedly mounted on the left and right sidesing driving wheel that retracing spring is arranged of the super-clutch type of rear vehicle shaft left and right sides, the left and right sidesing driving wheel that connects left and right sides pedal with the driving band of two nylon ropes or flat rubber belting formula respectively, one end of driving band is connected with pedal, and the other end is wound on the drive wheel.When stepping left-hand tread plate downwards with left foot, rotate together with rear wheel through driving band pulling left driving wheel, drive bicycle and advance; Simultaneously, right drive wheel is contrarotation coiling driving band under the effect of retracing spring, and makes horizontal reset on the right-hand tread plate.When stepping right-hand tread plate downwards with right crus of diaphragm, right drive wheel rotates together with rear wheel, drives bicycle and advances; The coiling of left driving wheel counter-rotating simultaneously driving band, horizontal reset on the left-hand tread plate.Alternately step left and right sides pedal up and down, just can drive bicycle and continue to advance.Structure is comparatively huge owing to adopt the rod pedal for this bicycle, and belted reliability of restricting is relatively poor, and bicycle running speed is low.Horizontal reset and drive wheel coiling driving band reset and adopt spring structures more on the pedal, and poor reliability makes the life-span short.

In addition, overriding clutch on the trailing wheel of existing bicycle, be called flywheel again, by fixing axletree, the ratchet and pawl arrangement that is rotationally connected with axletree, ratchet on the pawl wheel of click structure mechanism cooperates with handle ratchet wheel, and pawl wheel is connected with bicycle rear, and the driven sprocket of handle ratchet wheel periphery is through the drive sprocket engagement of messenger chain and stretcher.This overriding clutch is when driven sprocket input rotary power, and handle ratchet wheel rotates, and ratchet and handle ratchet wheel engagement drive pawl wheel and advance together with wheel revolutions.When imput power interrupts and driven sprocket when stopping operating together with handle ratchet wheel, ratchet and handle ratchet wheel engagement releasing, pawl wheel surmounts sprocket wheel continuation rotating operation together with wheel under the effect of rotatory inertia, thus bicycle moves under the effect of car load force of inertia.But this bicycle is when wheel reverses together with pawl wheel falling back, because the engagement of handle ratchet wheel and ratchet impels driven sprocket to be driven counter-rotating, causes driver trains such as driving chain, drive sprocket, stretcher to reverse.Therefore, use the bicycle of this overriding clutch to have the problem that to move backward.

Summary of the invention

In view of above-mentioned, the object of the present invention is to provide a kind of moving velocity fast, use reliable, drive the labour-saving reciprocating footoperated bicycle with dual flywheels.And the reciprocating footoperated bicycle with dual flywheels that further provides a kind of energy to move backward.

The present invention adopts respectively with the left and right sidesing driving wheel and the left and right sides overriding clutch of the supporting centering type of the left and right sides pedal of crank-type and realizes its purpose; And further on existing overriding clutch basis, adopt the trip ring that matches with ratchet, with the shift fork that matches with trip ring and fixed gear wheel, make it when the pawl wheel contrarotation, stir trip ring pushing ratchet, pawl wheel is freely rotated together with wheel realize its purpose to the engagement of releasing with handle ratchet wheel.

Reciprocating footoperated bicycle with dual flywheels of the present invention (referring to accompanying drawing), comprise vehicle frame (1), the saddle that connects to ground (2), the bogie car that is rotationally connected with vehicle frame is (3), front vehicle wheel (5) and rear wheel (6), vehicle frame be rotationally connected respectively left-hand tread plate (7) and right-hand tread plate (8), the both sides of wheel connect left overriding clutch (14) and right overriding clutch (15) respectively, above-mentioned left-hand tread plate is the crank-type structure and is connected left driving wheel (9) and right drive wheel (10) respectively with right-hand tread plate, messenger chain (41) left driving wheel that is in transmission connection successively, left side overriding clutch, the wheel (12) of falling on the vehicle frame, right overriding clutch, right drive wheel, left driving wheel and right drive wheel all are accentric sectional wheels, and its eccentric throw meshes direction and increases gradually from the messenger chain point of connection along chain-driving.

The rotating shaft of above-mentioned left driving wheel (9), left overriding clutch (14), right overriding clutch (15), right drive wheel (10) is parallel to each other and is vertical with the rotating shaft of the wheel (12) of falling, above-mentioned messenger chain (41) has three sections, the two ends of messenger chain connect left driving wheel and right drive wheel respectively, the chain rivet in messenger chain stage casing with about the section chain rivet vertical.

Above-mentioned left overriding clutch (14) and right overriding clutch (15) are connected to the left and right sides of rear wheel (6) and are rotatably connected on the axletree (16) of vehicle frame (1), left and right sides overriding clutch is the left-right symmetric structure, all have and sprocket wheel (21) bonded assembly handle ratchet wheel (22), with rear wheel (6) bonded assembly pawl wheel (24), the ratchet (28) and the ratchet engage spring (29) thereof that are meshed with handle ratchet wheel are arranged on the pawl wheel periphery, the periphery of pawl wheel has the trip ring (31) of normal-running fit, the pawl wheel shift fork (32) that is rotationally connected, fixed gear wheel (19) one way engagement on shift fork and the axletree and cooperates with driving lever mouth (40) formula of inserting of living on the trip ring, the pawl slot (39) on trip encircles cooperates with the ratchet folding.

Above-mentioned shift fork (32) can be in the shift fork hole (30) of pawl wheel (24), declutch shift shaft (33) is rotationally connected with shift fork, parallel with axletree (16) and captive joint with pawl wheel, pointed tooth of shift fork (34) and fixed gear wheel (19) engagement, the shift fork spring (27) of loop wire shape is in the spring groove (36) of shift fork and in the annular groove (31) of pawl wheel periphery.

Above-mentioned sprocket wheel (21) can be near rear wheel (6), and sprocket wheel is installed on the pawl wheel with cup and steel ball (23), and pawl wheel is installed on the axletree (16) with cup and steel ball (23).

The use of bicycle of the present invention is identical with existing reciprocating pedal formula bicycle.

The present invention has following advantage and effect compared with prior art.

One, the eccentric structure of left and right sidesing driving wheel of the present invention, particularly eccentric throw meshes the structure that direction increases gradually from the messenger chain point of connection along chain-driving, under the pedal rotation speed unmodified condition of the left and right sides, the corresponding increase of speed of drive wheel pulling messenger chain, the rotative speed of wheel increases, and the moving velocity of bicycle increases.When the pedal of crank-type rotated forward, the eccentric throw of transmission point of engagement increased gradually, and pin increases the downward component of the power that scrunches of pedal and the distance of S. A., and rotating torque increases, thereby laborsaving relatively.Therefore this bicycle has the advantage that driving is more laborsaving, moving velocity is fast.

Two, the pedal structure of the crank-type that up and down reciprocatingly rotates of the present invention and fan-shaped drive wheel structure, because crank does not carry out full Zhou Xuanzhuan, do not rotate the dead point, and left and right sides pedal can be a no gap driven, the corresponding increase of actual driving time, again since the angle that crank back and forth rotates less than 180 °, the alternate frequency of unit time increases, thereby has the advantage that can improve bicycle running speed.

Three, the trip ring of overriding clutch of the present invention, shift fork, fixed teeth structure, can be when wheel reverses together with pawl wheel, remove the engagement of ratchet and handle ratchet wheel, disconnecting pawl wheel and handle ratchet wheel is in transmission connection, because pawl wheel is connected with wheel, handle ratchet wheel is connected with sprocket wheel, thereby disconnects being in transmission connection of wheel and sprocket wheel, make the contrarotation of wheel unfettered, thereby make this bicycle have the advantage that to move backward.

The present invention is suitable for doing the manpower vehicle and transportation means.

Below, with embodiment and accompanying drawing thereof the present invention is further described again.

Description of drawings

Fig. 1 is the structural representation of a kind of reciprocating footoperated bicycle with dual flywheels of the present invention.

Fig. 2 is the chain-driving scheme drawing of Fig. 1.

Fig. 3 is the left side chain-driving figure of Fig. 1.

Fig. 4 is the structural representation of the overriding clutch of Fig. 1.

Fig. 5 is the A-A cutaway view of Fig. 4.

The specific embodiment

Embodiment 1

A kind of reciprocating footoperated bicycle with dual flywheels of the present invention, as shown in drawings.By the vehicle frame 1 of the bicycle of common structure, saddle 2, bogie car 3, brake and brake lever 4, front vehicle wheel 5, rear wheel 6 and driver train etc. constitute.Driver train is made of pedal, drive wheel, the wheel of falling, overriding clutch, messenger chain etc.

Above-mentioned pedal referring to Fig. 1,3, has the left-hand tread plate 7 and the right-hand tread plate 8 of the crank-type of common structure.Above-mentioned drive wheel referring to Fig. 1,3, has with left-hand tread plate and right-hand tread plate to be coaxial line bonded assembly left driving wheel 9 and right drive wheel 10 respectively.Left-hand tread plate 7 and left driving wheel 9 usefulness bearing installations are at the left end of bicycle middle shaft 11, and right-hand tread plate 8 and right drive wheel 10 usefulness bearing installations are at the right-hand member of bicycle middle shaft 11, and axis is fixedly mounted on the vehicle frame.The structure of the left-hand tread plate at axis two ends and left driving wheel and right-hand tread plate and right drive wheel is symmetrical, but differ suitable angle be mounted to one on left and right sides pedal up one below.Left driving wheel and right drive wheel all are accentric sectional wheels, and its eccentric throw meshes direction and increases gradually from the messenger chain point of connection along chain-driving.

The above-mentioned wheel 12 of falling referring to Fig. 1,2,3, adopts chain sprocket structure.Between rear wheel 6 and axis 11.Leading section in the rear wheel fork 13 of vehicle frame has the projecting shaft that downwards dangle vertical with the axis, and the wheel of falling is installed on the cantilever with bearing and nut.

Above-mentioned overriding clutch referring to Fig. 4,5, has left overriding clutch 14 and right overriding clutch 15.The left and right sides of bicycle rear wheel 6 connects left and right sides overriding clutch respectively.Left and right sides overriding clutch is installed on the axletree 16 of bicycle, and rear wheel relies on left and right sides overriding clutch to be bearing on the axletree, and axletree 17 skies of the tubular of rear wheel are enclosed within on the axletree.The two ends of axletree are fixedly mounted on respectively with nut in the prong of fork arm rear end, the left and right sides of rear wheel fork 13.The overriding clutch structure identical left-right symmetric that is in the left and right sides is by formations such as center gear, fixed gear wheel, driving wheel, handle ratchet wheel, pawl wheel, shift fork, You Huan.

Above-mentioned center gear 18, it is tubular to be ladder, is fixedly mounted on the end of axletree 16 with screw thread.The large-diameter portion in the stage casing of center gear is made fixed gear wheel 19.Fixed gear wheel can be made integrative-structure with center gear, also fixed gear wheel can be fixed on the center gear.

Above-mentioned driving wheel 20 referring to Fig. 4,5, is ladder tube axle shape.Periphery at the medial extremity of driving wheel minor diameter has integrally formed sprocket wheel 21.Sprocket wheel also can be a structure and being packed on the driving wheel alone.The messenger chain engagement of sprocket wheel and bicycle.The ratchet that is shaped in interior week at the large diameter external side end of driving wheel constitutes handle ratchet wheel 22.Also can be by the driving wheel that constitutes of alone sprocket wheel and handle ratchet wheel.Driving wheel is installed in the pawl wheel periphery with the two cover cups and the steel ball 23 that are positioned at sprocket wheel portion with being rotating.

Above-mentioned pawl wheel 24 referring to Fig. 4,5, is ladder tube axle shape, and the medial extremity of pawl wheel is with being threaded on the hind axle 17.The larger diameter end in the outside of pawl wheel is the periphery of the smaller diameter end of the inboard that is installed in rotation on center gear 18 with cup and steel ball 23.The smaller diameter end of the inboard of pawl wheel is near the wheel hub 25 of spoke structure, and hind axle 17 and wheel hub 25 constitute rear wheel with wheel rim and tire etc.The larger diameter end in the outside of pawl wheel is the pawl disk 26 of short cylinder shaped, and in the annular chamber of pawl disk between handle ratchet wheel 22 and fixed gear wheel 19, structure is similar with the pawl wheel of common bicycle freewheel.Be shaped on the pawl base 27 of one or two breach shape on the outer peripheral edges of the medial extremity of pawl disk 26, the ratchet 28 and the ratchet engage spring 29 thereof of equipped arc bar shaped in the pawl base.Under the tension force effect of ratchet engage spring, ratchet 28 front ends and handle ratchet wheel 22 are the constant-mesh state.Shift fork hole 30, the position in shift fork hole and fixed gear wheel 19 adaptations of the deltiod that radially runs through barrel are arranged at the external side end of pawl disk.In periphery annular groove 31 is arranged with respect to the pawl disk of shift fork hole site.

Above-mentioned shift fork 32 referring to Fig. 4,5, is with declutch shift shaft 33 and is installed in movingly in the shift fork hole 30, and declutch shift shaft is parallel to axletree 16 and captives joint with pawl disk 26.Shift fork 32 is made plate-like rhombus, or makes other geometric configuratioies such as strip shape, straight-bar shape, curved bar shape etc.The front end of shift fork is a pointed tooth 34, and there is driving lever 35 at the rear portion, and the driving lever middle part is shaped on the spring groove vertical with declutch shift shaft 36.The shift fork spring 37 that is the wire annular arrangement is installed in the spring groove, and places the annular groove 31 of pawl disk periphery and obtain supporting.The shift fork spring also can be made other the common spring structures such as the wire spring or the plate spring of circular arc.

Above-mentioned trip ring 38 referring to Fig. 4,5, is annular arrangement, is sleeved on rotationally in the annular chamber between pawl disk 26 and the handle ratchet wheel 22, and axis direction is positioned at the position of shift fork 32 and ratchet 28.One by one corresponding to each ratchet, open the pawl slot 39 that is shaped on breach shape at the periphery of the medial extremity of trip ring 38.External side end at the trip ring is opened the driving lever mouth 40 that is shaped on breakthrough form.After the assembling, the driving lever of shift fork 32 35 inserts and is the formula of inserting of living in the driving lever mouths 40 and cooperates, and pointed tooth 34 be the one way engagement structure with fixed gear wheel 19, is skewed at the effect lower shift fork 32 of shift fork spring 37, and the pointed tooth 34 and the fixed gear wheel 19 of front end are non-engagement state.Pawl slot 39 is folding with ratchet 28 and cooperates, and promptly the outside portion of ratchet front end can be stretched out from pawl slot, and the ratchet front end can be meshed with handle ratchet wheel 22; After trip ring 38 was by 35 groups of commentaries on classics of the driving lever of shift fork 32, the engagement of ratchet and handle ratchet wheel was removed in the outside portion of trip ring pushing ratchet and ratchet is pressed into pawl base 27.

Above-mentioned messenger chain 41 referring to Fig. 1,2,3, is selected common bicycle messenger chain for use.Messenger chain 41 is formed by three sections.The two ends of messenger chain are fixedly connected on respectively on left driving wheel 9 and the right drive wheel 10, the left side section of messenger chain meshes with the sprocket wheel 21 of left driving wheel 9 and left overriding clutch 14, the right section of messenger chain meshes with the sprocket wheel 21 of right drive wheel 10 and right overriding clutch 15, the stage casing of messenger chain and wheel 12 engagements of falling.The chain rivet in messenger chain stage casing with about the chain rivet of section vertical, the carrier bar that connects left side section and stage casing, stage casing and the right side section can be bent into that two ends are vertical each other realizes.The chain-driving of this driver train is left driving wheel 9, left overriding clutch 14, fall wheel 12, right overriding clutch 15, right drive wheel 10 in proper order.

Use the bicycle of present embodiment, when depressing left-hand tread plate 7, left driving wheel 9 rotates forward, through messenger chain 41, sprocket wheel 21 rotations of transmission left side overriding clutch 14, because its handle ratchet wheel 22 is the constant-mesh state with ratchet 28, shift fork 32 is non-engagement state with fixed gear wheel 19, then drive pawl wheel 22 and rotate forward, drive bicycle and advance together with rear wheel 6; Messenger chain is through the wheel 12 of falling simultaneously, and the sprocket wheel that spurs right overriding clutch 15 oppositely dallies, and this moment, the handle ratchet wheel and the ratchet of right overriding clutch were non-engagement state, spurred right drive wheel 10 through messenger chain again and rotated backward horizontal reset on the right-hand tread plate 8.When depressing right-hand tread plate 8, right drive wheel 10 rotates forward, and is opposite with said process, and through messenger chain 41, the right overriding clutch 15 of transmission rotates forward together with rear wheel 6, drives bicycle and advances; Messenger chain rotates backward horizontal reset on the left-hand tread plate 7 through the sprocket wheel 21 of the left overriding clutch 14 of idle running, the wheel 12 of falling, drive left driving wheel 9 simultaneously.When alternately stepping left and right sides pedal up and down, then drive bicycle and continue to advance with left and right sides pin.

When bicycle fell back backward, rear wheel 6 rotated backward together with pawl wheel 22, and referring to Fig. 4, arrow shows the rotation direction of pawl wheel when bicycle falls back among the figure.The pointed tooth 34 of the shift fork 32 of left and right sides overriding clutch meshes with fixed gear wheel 19 at this moment, the promotion shift fork rotates counterclockwise, then the driving lever 35 in the driving lever mouth 40 of trip ring 38 promotes to swim to encircle and rotates counterclockwise, the peristoma portion pushing ratchet 28 of the pawl slot 39 of trip ring, overcome the tension force of ratchet engage spring 29, ratchet is pressed into pawl base 27, until removing the engagement of ratchet 28 with handle ratchet wheel 22, disconnect being in transmission connection of sprocket wheel 21 and pawl wheel 24, pawl wheel is free rotation state together with rear wheel 6, thereby realizes falling back of bicycle.

Claims

1, reciprocating footoperated bicycle with dual flywheels, comprise vehicle frame (1), the saddle that connects to ground (2), the bogie car that is rotationally connected with vehicle frame is (3), front vehicle wheel (5) and rear wheel (6), vehicle frame be rotationally connected respectively left-hand tread plate (7) and right-hand tread plate (8), the both sides of wheel connect left overriding clutch (14) and right overriding clutch (15) respectively, it is characterized in that left-hand tread plate and right-hand tread plate are the crank-type structure and are connected left driving wheel (9) and right drive wheel (10) respectively, messenger chain (41) left driving wheel that is in transmission connection successively, left side overriding clutch, the wheel (12) of falling on the vehicle frame, right overriding clutch, right drive wheel, left driving wheel and right drive wheel all are accentric sectional wheels, and its eccentric throw meshes direction and increases gradually from the messenger chain point of connection along chain-driving.

2, reciprocating footoperated bicycle with dual flywheels as claimed in claim 1, the rotating shaft that it is characterized in that said left driving wheel (9), left overriding clutch (14), right overriding clutch (15), right drive wheel (10) is parallel to each other and is vertical with the rotating shaft of the wheel (12) of falling, said messenger chain (41) has three sections, the two ends of messenger chain connect left driving wheel and right drive wheel respectively, the chain rivet in messenger chain stage casing with about the section chain rivet vertical.

3, reciprocating footoperated bicycle with dual flywheels as claimed in claim 1 or 2, it is characterized in that said left overriding clutch (14) and right overriding clutch (15) are connected to the left and right sides of rear wheel (6) and are rotatably connected on the axletree (16) of vehicle frame (1), left and right sides overriding clutch is the left-right symmetric structure, all have and sprocket wheel (21) bonded assembly handle ratchet wheel (22), with rear wheel (6) bonded assembly pawl wheel (24), the ratchet (28) and the ratchet engage spring (29) thereof that are meshed with handle ratchet wheel are arranged on the pawl wheel periphery, the periphery of pawl wheel has the trip ring (31) of normal-running fit, the pawl wheel shift fork (32) that is rotationally connected, fixed gear wheel (19) one way engagement on shift fork and the axletree and cooperates with driving lever mouth (40) formula of inserting of living on the trip ring, the pawl slot (39) on trip encircles cooperates with the ratchet folding.

4, reciprocating footoperated bicycle with dual flywheels according to claim 3, it is characterized in that said shift fork (32) is in the shift fork hole (30) of pawl wheel (24), declutch shift shaft (33) is rotationally connected with shift fork, parallel with axletree (16) and captive joint with pawl wheel, pointed tooth of shift fork (34) and fixed gear wheel (19) engagement, the shift fork spring (27) of loop wire shape is in the spring groove (36) of shift fork and in the annular groove (31) of pawl wheel periphery.

5, reciprocating footoperated bicycle with dual flywheels according to claim 3, it is characterized in that said sprocket wheel (21) is near rear wheel (6), sprocket wheel is installed on the pawl wheel with cup and steel ball (23), and pawl wheel is installed on the axletree (16) with cup and steel ball (23).