CN2221545Y

CN2221545Y - Double-crank rocker-bar cycle

Info

Publication number: CN2221545Y
Application number: CN94230873U
Authority: CN
Inventors: 郑汉成
Original assignee: Individual
Current assignee: Individual
Priority date: 1994-11-23
Filing date: 1994-11-23
Publication date: 1996-03-06
Anticipated expiration: 2004-11-23

Abstract

The utility model relates to a double-crank rocker-bar cycle, wherein, a transmission part is mainly composed of two couple of driving and driven wheels, two side bars, two rocker bars and a rear brake with a clutch. The two couple of driving and driven wheels, two connecting bars and the two rocker bars composite two double-crank rocker-bar mechanisms which always inversely rock to dead-center at the same time and are suitable for alternative pedaling by two feet. The mechanism mainly changes reciprocating pedaling into the rotation of a transmitting wheel and a rear wheel; the two driving wheels are arranged on the bracing plates at both sides of the rear wheel, the two rocker bars are arranged on a rocking axle at the lower end of a cycle frame, and all rotary shafts are paralleled with a rear wheel spindle. The double-crank rocker-bar cycle needs no flywheel and no circumferential pedaling and can increase the driving efficiency and the durability of the cycle.

Description

A kind of double crank rod-type bicycle

A kind of double crank rocker-type bicycle belongs to the improvement of bicycle drive.

The at present actual conventional bicycle that uses, be in flywheel jack, crank up formula bicycle, the driving because of circumference step crank not only idle work, loss is big, drive efficiency is low, and leg stern movable amplitude is big, the driving fatiguability; For eliminating these defectives, people have proposed various improvement projects, as the patent No. is ZL922361630 double crank rocker-type bicycle, though can change double-legged circumference steps to back and forth stepping, improved running mode, and drive efficiency is increased: but the jack of flywheel wearing and tearing still can not eliminate, and especially utilize asynchronous two rocking bars in dead point to turn over the scheme at dead point mutually, and it is uncomfortable to make bipod step rocking bar.

The purpose of this utility model provides the double crank rocker-type bicycle that a kind of trailing wheel is driven by the power-transfer clutch on the backshaft skin, make the left rocker mutually reciprocal dead point of shaking of while always, bicycle driving efficient and durability can not only be improved, the custom that steps of Bipedal can also be more met.

The scheme that the utility model purpose reaches is: its driving device mainly respectively connects a quadric linkage by the power wheel at backshaft skin two ends and forms; The floral disc cover of trailing wheel is installed at the backshaft skin middle part with lining, and by power-transfer clutch and backshaft skin clutch, power-transfer clutch is installed in the chute of backshaft skin, the backshaft skin two ends respectively install a little flower wheel and the two big driving wheel straight ratio transmissions that are installed on the fagging of trailing wheel both sides, respectively put crank web on the wheel body of two big driving wheels or its axle, and respectively with left and right sides connecting rod and the two bent rocking bar loose joints that are installed on the axis of rocking of vehicle frame lower end, the mutual installation site of two crank webs must make the left rocker mutually reciprocal dead point of shaking of while always; The all parallel hind axle of all turning cylinders in two quadric linkages.The configuration of vehicle frame should guarantee that axis of rocking is than the axis of conventional bicycle closely face and trailing wheel.Two big or small principal and subordinate wheels can be engaging gears, the also sprocket wheel of chain gear, but transmitting ratio must equate, could be in driving any time keep the mutual alignment of the former installation of two crank webs; Adjust the dead point of two cranks, bipod is alternately stepped simultaneously; Two crank webs shook the dead point simultaneously, leaned on the rotator inertia of trailing wheel entirely; When driving trailing wheel because of the power-transfer clutch with no ratchet, trailing wheel has the inertial flywheel effect in the double crank rocker mechanism; All rotating shafts are all answered parallel hind axle and bearing are arranged in the double crank rocker mechanism, could be when the power-transfer clutch both feet that close alternately step two rocking bars, and crank web and principal and subordinate's wheel and backshaft skin rotate flexibly, drive the trailing wheel rotation and travel; So just constitute the double crank rocker-type bicycle that a kind of trailing wheel is driven by power-transfer clutch; Because it is not done circumference and steps, the comparable conventional bicycle middle shaft of axis of rocking is face and trailing wheel closely, and therefore, the size of its vehicle frame will be dwindled with configuration and will be changed; Do not do circumference because of it equally and step, thigh and buttocks movable amplitude are dwindled, and the shape of cushion can be recessed formula of more comfortable stern or chair form.

The utility model is not because of there being flywheel easy to wear, so the durability of bicycle is than the overall height voluntarily that drives trailing wheel with flywheel; There is not the idle work consumption of circumference in stepping again, so the overall height voluntarily that bicycle driving efficiency ratio circumference steps; The transmission of double crank rocker mechanism makes the stressed steady of backshaft skin, and especially the power-transfer clutch with no ratchet drives trailing wheel, the reduction Δ E of trailing wheel rotational kinetic energy _{The K wheel}It is the energy that turns over the dead point for quadric linkage; According to formula Δ E _K=1/2 * I ω ₀ ²-1/2 * I (ω ₀ ²-ω ²) as can be known, as the rotor inertia I that increases trailing wheel _1cTurn over the required energy Δ E in dead point with the minimizing quadric linkage _KThe time, angle speed then ₀Reduction ω ₀The value of-ω diminishes, and this is to the low angle speed ω of trailing wheel ₀During climbing, in the time of can not crossing dead center position because of rocking bar, trailing wheel becomes littler angular velocity omega and answers; If the minimum angle speed ω that trailing wheel is multiple, speed ω in trailing wheel angle when then climbing ₀Less value is arranged, can increase grade climbing performance, increase the rotor inertia I of trailing wheel _Wheel, only need increase the diameter or the quality of trailing wheel, and this available tricycle wheel is done trailing wheel or just can be increased I with double rear wheel _WheelReduce Δ E _KOnly need use instead lightweight quadric linkage and each turning cylinder install additional bearing just can, so the utility model can increase some grade climbing performances fully; And drive the bicycle of trailing wheel with flywheel, because the energy that crank is crossed the dead point is entirely by the reduction Δ E of rotational kinetic energy own _{The K song}So, be difficult to increasing I _BentReduce Δ E _{The K wheel}Way increase grade climbing performance.Below in conjunction with accompanying drawing in detail, embodiment of the utility model is described in detail.

Fig. 1 is a bicycle overall structure scheme drawing

Fig. 2 is a bicycle rear axle block construction scheme drawing

As shown in drawings: on 28 on the fixedly round platform 24 at backshaft skin 11 middle parts and the removable round platform of band nut, the floral disc cover 26 of trailing wheel 18 is installed with lining 27, installation can axially movable power-transfer clutch 22 in the backshaft skin chute 19 of fixing round platform 24 1 ends is arranged, power-transfer clutch 22 is compressed by spring 20, and engage by friction lining or other method interface 25 with the inner lane end face of floral disc cover 26, trailing wheel 18 is advanced with backshaft skin 11 rotations; Clutch the brake lever 17 below the handlebar during descending, make spring 20 compressions by wire drawing lever 15 and shift fork 21, power-transfer clutch 22 unclamps with interface 25 under the effect of spring 23, and trailing wheel 18 freely rotates around backshaft skin 11 by lining 27 and advances; Wire drawing lever 15 is installed on the trailing wheel strut 14; The little driven gear 12 that backshaft skin 11 two ends install and the big driving gear 9 straight ratio engaged transmission (but also straight ratio sprocket wheel chain gear) of trailing wheel 18 both sides, the axle and the bearing 7 of two big driving gears 9 are installed on the fagging 5 of trailing wheel both sides, respectively put a crank web 6 on the wheel body of two big driving gears 9,8, and two crank webs 6,8 mutual installation site must make left rocker 2, the mutually reciprocal dead point of shaking simultaneously always, could alternately step rocking bar 2 by bipod, and use respectively left and right sides connecting rod 3 with about bent 2 active connections of rocking bar, about bent rocking bar 2 upper end bendings (legpower direction for a change) and put lightweight left and right sides pedal 1,5, about bent rocking bar 2 can shake around the axis of rocking 4 that is installed in both sides, vehicle frame 29 lower end; The all parallel hind axle 10 of all turning cylinders in the double crank swing mechanism; Be open to traffic when stepping on, the power-transfer clutch 22 that closes (during brake lever 17 not pinchings, power-transfer clutch 22 closes), go-cart slightly forward alternately steps left and right sides pedal 1 along shaking to both feet of rocking bar 2 again, just can drive trailing wheel 18 and travel; During brake, power-transfer clutch 22 both feet that close step on that left rocker 2 is motionless just can brake, if cooperate conventional front brake (not having picture), effect is better; Mounting or dismounting trailing wheel 18 or floral disc overlapped 26 o'clock, must pull down the removable round platform 28 of band nut earlier and hold small transmission gear 12 together; The utility model steps owing to not doing circumference; axis of rocking 4 can be contracted to 12cm apart from the ground height; can be contracted to 8cm apart from trailing wheel 18 length; therefore the structure and the shape of vehicle frame 29 must adapt to change; cushion 16 can be used recessed formula of stern or the chair form with buttocks contact surface broad, is the safety guard-safeguard driving device, at 18 liang of side wheel covers 13 of trailing wheel; other structure is complete in conventional bike tech, so the utility model is easy to the enforcement of going into operation.

Claims

1. crank-rocker style bicycle, its driving device mainly respectively connects a quadric linkage by the power wheel (12) at backshaft skin (11) two ends and forms, it is characterized in that: the floral disc cover (26) of trailing wheel (18) is installed at backshaft skin (11) middle part with lining (27), and by power-transfer clutch (22) and backshaft skin (11) clutch, power-transfer clutch (22) is installed in the chute (19) of backshaft skin (11), backshaft skin (11) two ends respectively install a little flower wheel (12) and two big driving wheel (9) the straight ratio transmissions that are installed on trailing wheel (18) the both sides faggings (5), respectively put crank web (6 on the wheel body of two big driving wheels (9) or its axle (7), 8), and use left and right sides connecting rod (3) respectively and be installed in two bent rocking bar (2) loose joints on vehicle frame (29) the lower end axis of rocking (4), two crank webs (6,8) mutual installation site must make left rocker (2) the mutually reciprocal dead point of shaking of while always; The all parallel hind axles of all turning cylinders (10) in two quadric linkages.

2. according to the described a kind of crank-rocker style bicycle of claim 1, the configuration that it is characterized in that vehicle frame (29) should guarantee that axis of rocking (4) is than the axis of conventional bicycle closely face and trailing wheel (18).