WO1993003954A1 - Appareil de type bicyclette - Google Patents

Appareil de type bicyclette Download PDF

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Publication number
WO1993003954A1
WO1993003954A1 PCT/DE1992/000680 DE9200680W WO9303954A1 WO 1993003954 A1 WO1993003954 A1 WO 1993003954A1 DE 9200680 W DE9200680 W DE 9200680W WO 9303954 A1 WO9303954 A1 WO 9303954A1
Authority
WO
WIPO (PCT)
Prior art keywords
bicycle
frame
handlebar
pedal crank
crank
Prior art date
Application number
PCT/DE1992/000680
Other languages
German (de)
English (en)
Inventor
Ulrich Albert
Norbert Nattefort
Original Assignee
Ulrich Albert
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from DE9110207U external-priority patent/DE9110207U1/de
Priority claimed from DE9110206U external-priority patent/DE9110206U1/de
Priority claimed from DE9200880U external-priority patent/DE9200880U1/de
Application filed by Ulrich Albert filed Critical Ulrich Albert
Publication of WO1993003954A1 publication Critical patent/WO1993003954A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B62—LAND VEHICLES FOR TRAVELLING OTHERWISE THAN ON RAILS
    • B62M—RIDER PROPULSION OF WHEELED VEHICLES OR SLEDGES; POWERED PROPULSION OF SLEDGES OR SINGLE-TRACK CYCLES; TRANSMISSIONS SPECIALLY ADAPTED FOR SUCH VEHICLES
    • B62M1/00—Rider propulsion of wheeled vehicles
    • B62M1/10—Rider propulsion of wheeled vehicles involving devices which enable the mechanical storing and releasing of energy occasionally, e.g. arrangement of flywheels

Definitions

  • the invention relates to a bicycle-like device which corresponds to the preamble of claim 1.
  • the expression "bicycle-like device” is intended to encompass both an actual bicycle or tricycle and a stationary device, a so-called exercise bike.
  • the driven element is the rear wheel and the crossbar of the handlebars.
  • the cross bar In the case of the exercise bike, the cross bar only serves to attack the hands and cannot be swiveled.
  • the driven element can be any braking device that uses the energy applied via the foot pedals.
  • the movement of the foot pedals can be a continuous rotation, but also only a back and forth swiveling about a horizontal transverse axis through a limited angle of the pedal crank.
  • the pedal cranks for the two feet can be moved in the same direction or alternately.
  • the movement cycle is characterized by a certain non-uniformity.
  • the actual application of force takes place in a first phase when the pedal is depressed, while in the second phase, in which the pedal is returned to its uppermost position, nothing or only little is contributed to the development of power.
  • the object of the invention is to compare the working method of such a bicycle-like device.
  • the propulsion is generated by a longitudinal displacement of a reclining seat guided on a sled, with return springs coming into action.
  • the bicycle according to DE-OS 27 34 560 does not provide a rigid frame, but rather a frame consisting of a four-bar linkage and deformable in its plane with a pedal crank which can be pivoted back and forth.
  • the saddle rises rhythmically and forms a store of potential energy with the driver.
  • the deformable frame if it should have sufficient stability, is complex to manufacture.
  • the change in the height of the saddle and the steering geometry when driving are phenomena to which a normal cyclist is difficult to get used, while the invention has the usual properties of a normal bicycle with a rigid frame.
  • the arm force exerted on the handlebar is therefore included in the drive.
  • the configuration according to claim 3 is recommended.
  • the basic idea here is that the energy store acts on the inclinable handlebar or a part that is operatively connected to the handlebar and is attached to the frame on the other side. In this way, the design in the area of the rear wheel bearing and the foot drive can remain by means of a unidirectional rotating crank as in a conventional bicycle.
  • the energy store should preferably be arranged inside the frame (claim 4), where the assembly least disturbs and does not reach beyond the normal outline of the frame.
  • the energy store is a spring (claim 5) that can be compressed or pulled apart in a straight line and e.g. can be formed as a helical compression or tension spring, but also as a gas pressure spring or in a similar manner.
  • This crank can be integrated into the pedal crank according to claim 7 or can be mounted according to claim 8 on an additional bearing axis, from which a rotary transmission to the pedal crank is provided.
  • the latter embodiment is important and useful because it contains a particularly compact design of the energy storage arrangement, which does not require any major intervention in the other construction of a bicycle.
  • the embodiment according to claim 15 results in a seated position in which the legs do not act predominantly vertically downwards, but obliquely forward.
  • the pedal crank should make a continuous rotation, as it corresponds to the usual bicycle drive.
  • the two drives via the rotation of the pedal crank and the inclination of the handlebars should expediently have mutual coordination in such a way that both do not arrive at a dead center at the same time.
  • the embodiment according to claim 20 is helpful, which ensures that the overall system of the drive remains free of dead centers.
  • FIG. 1 shows a side view of a first exemplary embodiment in a perspective view
  • FIG. 2 shows the pedal crank of this exemplary embodiment with an additional chain and two additional sprockets
  • FIG. 3 shows a side view of a further exemplary embodiment
  • FIG. 4 shows a side view of a third exemplary embodiment with the driver in a semi-lying position
  • FIG. 5 shows a side view of a fourth embodiment
  • FIG. 6 shows the steering head area of the embodiment according to FIG. 5 in an enlarged perspective view
  • Fig. 7 shows in perspective the pedal crank of this embodiment
  • Fig. 8 is a side view of the energy store and its drive connection to the pedal crank
  • Fig. 9 to 1 2 show the phase relationships of the drive during one revolution of the pedal crank.
  • the in Fig. 1 designated as a whole by 500, represents a bicycle with a front wheel 1 and a rear wheel 2.
  • the front wheel 1 is mounted in the usual way on a front wheel axle 3 in a front wheel fork 4, which is mounted with a fork pin 5 on the web of the front wheel fork 4, which essentially continues the direction of the fork legs, in a steering head 6, which is mounted as the fork pin 5 surrounding tube section is formed, at the upper and lower end ball bearings are provided for pivotally supporting the front wheel fork 4 about a steering axis 9 inclined downwards and forwards in the direction of travel.
  • the steering head 6 is fixedly arranged at the front end of a substantially flat frame 10, which is upright in the driving position and which is assembled from tubular material with the outlines shown in the drawing or from such a flat, upright box component consists of sheet metal or a fiber-reinforced plastic.
  • a substantially flat frame 10 which is upright in the driving position and which is assembled from tubular material with the outlines shown in the drawing or from such a flat, upright box component consists of sheet metal or a fiber-reinforced plastic.
  • it is a conventional pentagonal frame with a diagonal tube 11 leading from the seat 1 2 to the bearing of the pedal crank 201, in which the seat tube 1 1 carrying the seat 1 2 is adjustable and can be inserted in a fixed manner can be .
  • the rear wheel 2 is mounted on a rear wheel axle 13, which is driven by a chain 34 connected to a chain wheel 37 connected to the pedal crank 201.
  • the rear wheel axle 13 and the front wheel axle 3 are thus connected to one another by the frame 10 in a manner which corresponds to the conventional bicycle and which results in the usual steering behavior.
  • Attached to the end of the fork pin 5 protruding from the upper end of the steering head 6 is a universal joint designated 20 in FIG. 1, which is connected at the other end to the handlebar pin 15 passing through the handlebar head 16.
  • the handlebar pin 15 which is part of the handlebar designated as a whole with 21 and which carries the handlebars protruding to both sides at the upper end, is in the handlebar head 16 in ball bearings 17, 18 arranged at its upper and lower end about a handlebar axis 19 pivoted.
  • a pivoting of the handlebar pin 15 by means of the handles about the axis 19 is transferred via the universal joint 20 into a corresponding pivoting of the fork 4 about the steering axis 9.
  • the handlebar head 16 is pivotable on the frame 10 about a transverse axis 22.
  • a lever 23 is rigidly connected to the handlebar head 16, which projects downward over the transverse axis 22 and continues to bend it slightly forward (FIG. 1, 3) or essentially in alignment (FIG. ⁇ ), at a joint 24 at the lower end
  • a connecting rod 25 is articulated to the lever 23, which leads to the pedal crank designated as a whole by 201, which is mounted on the frame 10 and carries the pedals 200 and 200 'on the outside on pedal crank arms 92.
  • the pedals can also be arranged offset by 180 ° in the usual way
  • the pedal crank 201 executes a unidirectional rotation mounted on two ball bearings on the axle parts 221 located between the pedals 200, 200 'on the frame 10 and in the middle between the axle parts 221 has a small crank 210 with an axle part 220 on which the connecting rod 25 attacks.
  • the pedal crank 201 is thus by the foot attack on the pedals 200, 200 'and additionally by the arm attack transmitted to the handlebar 210 on the handlebar spun.
  • an energy store 206 acts, which is designed as a helical tension spring 208 and, when the handlebar 21 is pivoted about the transverse axis 22, from the position shown in FIGS 1 and 3 rear is stretched to the front limit position.
  • the spring 208 releases the stored elastic energy again and supports the return movement or the further rotation of the pedal crank 201.
  • the arrangement is such that this effect can be felt in the area of the dead center of the pedal crank 201 and helps to overcome it.
  • FIG. 3 shows an exemplary embodiment, designated as a whole by 600, in which a shortened connecting rod 25 engages an eccentric point of a chain wheel 203 or a crank 215 connected to it.
  • the sprocket 203 lies in a plane parallel to the sprocket 37 and is mounted on an additional bearing axis 205 approximately in the middle of the lower, front spar 212 of the frame 10.
  • the chain wheel 203 transmits the movements of the handlebar head 16 about the transverse axis 22 and the energy-storing spring 206 to a further gear wheel 203 'which is mounted on the chain wheel 37 and the bottom bracket axis 209 on the same axis and with the Pedal crank 201 is rotatably connected.
  • connection of the foot drive and the combination of arm drive and spring force thus takes place through the further chain 204.
  • the two gear wheels 203 and 203 * have both the same diameter and the same number of teeth, so that there is a transmission ratio of 1: 1 and the phase relationship between the handlebar inclination and the pedal crank rotation remains constant.
  • Fig. 4 shows one designated as a whole at 700 Bicycle which differs from the bicycle 500 by a semi-lying positioning of the rider and the design of the frame 10 as a box frame made of plastic or sheet metal.
  • a backrest 208 is attached to the seat 12 with a bent tube 212.
  • the connecting line 207 of the seat 12 and the axis of the pedal crank 201 is inclined in this exemplary embodiment at an angle 224 of approximately 40 ° with respect to the horizontal 225.
  • the pedal crank 201 is located far forward, approximately in the front quarter of the frame 10. The force is thus applied obliquely downward and intercepted by the backrest 208. This support enables considerably more force to be exerted on the pedals 200, which makes sense since both legs are used at the same time. There is no longer any limitation in strength due to body weight.
  • the energy storage 206 is again formed in FIG. 4 as a helical tension spring 208 and in this case runs obliquely forwards and downwards from the upper limit 211, which is given here by the upper wall of the box frame, and engages one below the transverse z ' Axis 22 located near the lower end of the lever
  • Another exemplary embodiment, not shown, is the combination of vehicles 600 and 700, in which the semi-lying positioning of the driver with the backrest 208 and the additional chain wheels 203, 203 'are combined with the further chain 204.
  • Such a bike has already been built. Driving tests show good and comfortable driving characteristics.
  • FIG. 5 Another embodiment is shown in Fig. 5 as Whole designated with 800.
  • This exemplary embodiment also has a flat forward force direction of the legs and combines the entire energy storage and drive arrangement in a compact structural unit close behind the steering head 6 approximately in the front third of the frame 10.
  • the outline of this is similar to the pentagonal frame. is a bit lengthy compared to the usual configuration.
  • the upper frame tube 211 does not lead from the upper end of the steering head 6 to the seat 12, but downwards to the rear wheel axle 13.
  • the tube 85 carrying the seat 12 leads downwards in the vicinity of the pedal crank 201.
  • the frame 10 is a so-called Double loop frames, ie the upper frame tube 211 and the lower frame tube 96 are each provided twice, on both sides of the tube 85.
  • the energy store 206 in the form of a helical tension spring 206 is in the interior of the frame 10 in its front region between the upper frame tube 211 and the lower frame tube 96 approximately parallel to the steering head 6, with one end adjacent to the lower frame tube 96 brought.
  • the tension spring 208 does not act directly on the handlebar 21, but on the 'free end of a lever arm of an elongated, approximately horizontal two-armed intermediate lever 87 which in the middle on a bearing block 88 arranged on the underside of the upper frame tube 211 around a horizontal, Bearing axis 89 extending in the transverse direction of the frame plane is pivotably mounted.
  • a connecting rod 83 which is connected to the crank, designated as a whole by 210, which is integrated in the pedal crank 201 and which has the crank arms 94, as is particularly evident from FIG. 7 is seen.
  • the connecting rod 81 which is connected to the link 21, also acts on the crank 210.
  • the connection of the energy store 206 to the handlebar 21 is provided indirectly via the specified elements.
  • the pedal crank axis 209 is located approximately as high as the rear wheel axis 13, the bearing axis 89 is provided at a distance above it.
  • the seat 12 with the backrest 208 is slidably attached to a tube 86 on a support 86 on a support 86 leading from the rear upper corner of the frame to the pedal crank bearing.
  • the steering head area of the bicycle 800 is shown again enlarged in FIG. 6.
  • an upward-pointing bearing fork is attached, the legs 3, 41 of which bear inclination bearings 42 at the free ends, on which the steering head 16 with the steering pin 15 rotatable therein is mounted.
  • a handlebar fork is provided on the handlebar head, the legs 43, 45 of which point downward and are mounted on the inclined bearings 42 with their forked ends.
  • the extension is formed with the tube section 71, on the lower corner 73 of which the connecting rod 81 engages, which transmits the inclination movement of the handlebar head 16.
  • the fork pin 5 and the link pin 15 are connected to one another by a universal joint, designated as a whole by 20, the center of which lies on the transverse transverse axis 22 determined by the inclination bearings 42. In the position shown, the fork pin and the link pin 15 are aligned. If the handlebar or the handlebar head 16 is inclined, the fork pin 5 and the handlebar pin 15 form a small angle with one another. The steering movement of the handlebar 21 is transmitted via the handlebar pin 15 and the universal joint 20 at an angle to the fork pin 5 and thus to the fork 4.
  • the universal joint 20 is located in the space between the legs 39.41 and 43.45.
  • the pedal crank 201 of the bicycle 800 is shown again separately in FIG. 7. It has a cranked crank 210 with crank arms 94, 94 in the middle.
  • the connecting rods 81, 83 engage the crank 210.
  • the two pedal crank arms 92 are attached, at their free ends which carry pedals 200 rotatable about a transverse axis.
  • the pedal crank arm 2 point in the same direction. However, they can also be offset from one another by a small angle of below 30 °. Finally, it is also possible to offset the crank arms 92 by 180 ° in the conventional manner.
  • crank 210 and the pedal crank arms 92 are connected to one another in a rotationally fixed manner, but are also offset from one another. If the crank arms 94 of the crank 210 point vertically upwards according to FIG. 7, the pedal crank arm 92 are forward by approximately 20 ° -30 °, that is to say offset according to the views of FIGS. 5 and 7 in the counterclockwise direction.
  • the sprocket 37 is attached between a crank arm 94 and the adjacent bearing 97 of the pedal crank and acts on the rear wheel 2 via the chain 95.
  • the interaction of the energy storage device 206 in the form of a helical tension spring 208 with the pedal crank 201 is once again separately illustrated in FIG. 8.
  • the connecting rod 83 engages on the intermediate lever 87, which can be pivoted about an approximately horizontal central position about the bearing axis 89 and pivoted down.
  • the connecting rod 23 is mounted on the crank 210, which takes the connecting rod 83 and the intermediate lever 87 out of the one limit position shown in solid lines into the other limit position shown in dashed lines when it runs for the first time around the axis 209 of the pedal crank 201.
  • the intermediate lever 87 is designed as an essentially stretched two-armed lever. While the connecting rod 83 engages the free end of one lever arm, the free end of the other lever arm is the.
  • Tension spring 208 connected at 213 on the lower frame tube 96 (Fig. 5) is fixed.
  • the helical tension spring 208 forms the energy store 206. When the helical tension spring 208 is transitioned from the extended state into the stretched state shown in broken lines, this stores spring energy which can be released and used when the helical tension spring contracts again.
  • the sequence of movements of the drive mechanism is shown in four phases in FIGS. 9 to 12.
  • the bearing axis of the pedals 200 covers the larger circle shown in dash-dot lines, the articulation point of the connecting rod 83 on the crank 210 the smaller dash-dot circle.
  • the pedal crank arms 92 are approximately vertically upward, the crank 210 following at an angle of approximately 30 ° is not yet aligned with the connecting rod 81.
  • the helical tension spring forming the energy store 206 is completely contracted.
  • the handlebar with the handlebar head 16 has almost reached its front limit position, which is indicated by dash-dotted lines, but is still moving forward in the direction of the arrow.
  • the pedal crank 201 has rotated about 90 °.
  • the exertion of torque on the pedal crank arms 92 has become weaker due to the angular position and the reduced torque arm as a result.
  • the intermediate lever 87 has been pulled down by the connecting rod 83 and has therefore pivoted clockwise and the coil spring 208 has already been partially pulled apart.
  • the rotation of the pedal Crank in the clockwise direction indicated by the arrow is supported in this phase in that the driver pulls the handlebar to himself and thus pivots the handlebar head 16 in the manner indicated by the arrow, which by the connecting rod 81 on the crank 210 and thus on the Pedal crank 201 is transmitted.
  • the pedal crank 210 has again turned by approximately 80 °, and the handlebar or the handlebar head 16 is shortly before its rear limit position indicated by dashed lines.
  • the crank 210 and the connecting rod 83 are in the same direction. If the rotation continues a little, the aligned position of the crank 210 and the connecting rod 83 is exceeded and the helical tension spring 208 relaxes, the force exerted being converted into a torque in the indicated clockwise direction.
  • the helical tension spring 208 forming the energy store 206 thus supports the further movement of the pedal crank 201 in a phase in which the driver pulls up the legs and normally cannot exert any torque.
  • the pedal crank 201 has again turned about 120 ° and the helical tension spring 208 has already been partially contracted.
  • the tensile force of the helical tension spring 208 is now no longer so great, but it acts on the pedal crank 201 with a lever arm, which practically corresponds to the radius of the crank 210, because this and the connecting rod 83 are approximately at a right angle. There is therefore still sufficient torque to support the lifting of the legs in the last phase of the rotation when the pedal crank arms 92 come up again.
  • the arrangement returns to the state in FIG. 9.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)

Abstract

L'appareil de type bicyclette (800) comporte un cadre rigide (10) constitué de tubes de façon classique, avec une roue avant orientable (1) et une roue arrière (2) entraînée par une manivelle à pédale (201) et une chaîne (95). Il est prévu un accumulateur d'énergie élastique (206) constitué d'un ressort cylindrique de traction, lequel est à chaque cycle de pédalage élastiquement déformable et donc rechargeable, et lequel restitue, dans une deuxième phase, l'énergie mécanique accumulée pour l'entraînement de la roue arrière (2), lors de chaque cycle de pédalage. L'accumulateur d'énergie (206) est monté entre les tubes supérieur et inférieur (211 et 96) du cadre.
PCT/DE1992/000680 1991-08-17 1992-08-13 Appareil de type bicyclette WO1993003954A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
DEG9110207.3U 1991-08-17
DE9110207U DE9110207U1 (de) 1991-08-17 1991-08-17 Fahrradartiges Gerät
DE9110206U DE9110206U1 (de) 1991-08-17 1991-08-17 Mehrrädriges Fahrzeug, insbesondere Fahrrad
DEG9110206.5U 1991-08-17
DE9200880U DE9200880U1 (de) 1992-01-25 1992-01-25 Mehrrädriges Fahrzeug, insbesondere Fahrrad
DEG9200880.1U 1992-01-25

Publications (1)

Publication Number Publication Date
WO1993003954A1 true WO1993003954A1 (fr) 1993-03-04

Family

ID=27208337

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1992/000680 WO1993003954A1 (fr) 1991-08-17 1992-08-13 Appareil de type bicyclette

Country Status (1)

Country Link
WO (1) WO1993003954A1 (fr)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE101280C (fr) *
FR807574A (fr) * 1936-04-03 1937-01-15 Système de compensateur d'efforts pour cycles et autres applications
US2484472A (en) * 1948-08-10 1949-10-11 Charles W Simpson Propulsion aid for velocipedes
FR953429A (fr) * 1947-09-13 1949-12-06 Améliorations applicables à tous véhicules sans moteur, tel que la bicyclette, aupoint de vue du rôle des bras
US2510013A (en) * 1946-06-25 1950-05-30 Robert T Edgar Rider-propelled vehicle
FR2515601A1 (fr) * 1981-11-02 1983-05-06 Barbati Silvio Bicycle a propulsion manuelle et pedestre

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE101280C (fr) *
FR807574A (fr) * 1936-04-03 1937-01-15 Système de compensateur d'efforts pour cycles et autres applications
US2510013A (en) * 1946-06-25 1950-05-30 Robert T Edgar Rider-propelled vehicle
FR953429A (fr) * 1947-09-13 1949-12-06 Améliorations applicables à tous véhicules sans moteur, tel que la bicyclette, aupoint de vue du rôle des bras
US2484472A (en) * 1948-08-10 1949-10-11 Charles W Simpson Propulsion aid for velocipedes
FR2515601A1 (fr) * 1981-11-02 1983-05-06 Barbati Silvio Bicycle a propulsion manuelle et pedestre

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