CH224823A - Bicycle drive with a pedal lever that can be changed in its effective length. - Google Patents

Bicycle drive with a pedal lever that can be changed in its effective length.

Info

Publication number
CH224823A
CH224823A CH224823DA CH224823A CH 224823 A CH224823 A CH 224823A CH 224823D A CH224823D A CH 224823DA CH 224823 A CH224823 A CH 224823A
Authority
CH
Switzerland
Prior art keywords
pedal
bicycle drive
pedal lever
effective length
bracket
Prior art date
Application number
Other languages
German (de)
Inventor
Spaeni Martin
Original Assignee
Spaeni Martin
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
Application filed by Spaeni Martin filed Critical Spaeni Martin
Publication of CH224823A publication Critical patent/CH224823A/en

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
    • B62M3/00—Construction of cranks operated by hand or foot
    • B62M3/02—Construction of cranks operated by hand or foot of adjustable length
    • B62M3/04—Construction of cranks operated by hand or foot of adjustable length automatically adjusting

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Mechanical Control Devices (AREA)

Description

  

  Fahrradantrieb mit in seiner wirksamen Länge     veränderlichem        Trethebel.       Gegenstand vorliegender     Erfindung    ist  ein Fahrradantrieb mit in seiner wirksamen  Länge veränderlichem Trethebel. Solche be  kannte Trethebel sind derart ausgebildet, dass  sie sich während des     Tretens    selbsttätig ver  längern     bezw.    verkürzen und dadurch das  Fahren erleichtern.  



  In der beiliegenden Zeichnung ist ein  Ausführungsbeispiel des Erfindungsgegen  standes schematisch dargestellt, und es zeigt:       Fig.    1 eine Ansicht des Antriebes,       Fig.    2 einen Schnitt nach der Linie     II-II     der     Fig.    1,       Fig.    3 einen Schnitt nach der Linie       III-III    der     Fig.    2.  



  Auf einem     Tretlagerzapfen    1 sind in be  kannter Weise beidseitig zweiteilige     Tret-          hebel    2 aufgesetzt und mittels Bolzen 3 ge  sichert. Die Trethebel besitzen einen Arm  mit U-förmigem Querschnitt. Der Arm weist  eine     Ausnehmung    4 auf, in welcher ein ver  schiebbarer     Pedalträger    5 gleitet. Auf dem       Pedalträger    5 ist einerseits ein Pedal 6 und  anderseits ein Bolzen 7 eingeschraubt. Der    Bolzen 7 gleitet in einem Längsschlitz 9 des  Armes 2. Er trägt eine drehbare Rolle 11,  die zwischen zwei konzentrischen Führungs  ringen 12 läuft, letztere sind exzentrisch zur  Tretwelle angeordnet.

   Die Führungsringe 12  sind mittels     Briden    13 am     Rahmenrohrteil     14 befestigt. Der     Pedalträger    stellt sich in  die äusserste Lage, wenn der Trethebel im  Sinne des     Pfeils    I nach unten bewegt     wird;     dadurch wird     ein    grösseres Drehmoment be  wirkt.  



  Beim Weiterdrehen wird die Rolle 11 und  mit ihr das Pedal 6, der Form der Führung  1.2 folgend, gegen die     Tretlagernabe    hin ver  schoben, das heisst die wirksame Trethebel  länge wird dadurch verkürzt. Dies     bedeutet     während des Ansteigens des Trethebels für  den Fahrenden     eine    Erleichterung.  



  Der     Pedalträger    5 gleitet zwischen Wal  zen 15, welche in     Leisten    16 gelagert sind.  Die Leisten 16 sind     im    Arm mittels Schrau  ben 17 gehalten. Auf dem Trethebel sitzt  als äusserer Abschluss ein Deckel 18.



  Bicycle drive with a pedal lever that can be changed in its effective length. The subject matter of the present invention is a bicycle drive with a pedal lever that can be varied in its effective length. Such be known pedal levers are designed such that they automatically extend ver or during pedaling. shorten and thereby make driving easier.



  In the accompanying drawing, an embodiment of the subject matter of the invention is shown schematically, and it shows: Fig. 1 is a view of the drive, Fig. 2 is a section along the line II-II of Fig. 1, Fig. 3 is a section along the line III -III of FIG. 2.



  Two-part pedal levers 2 are placed on both sides in a known manner on a bottom bracket journal 1 and secured by means of bolts 3. The pedal levers have an arm with a U-shaped cross-section. The arm has a recess 4 in which a ver slidable pedal bracket 5 slides. A pedal 6 on the one hand and a bolt 7 on the other hand are screwed onto the pedal support 5. The bolt 7 slides in a longitudinal slot 9 of the arm 2. It carries a rotatable roller 11 which runs between two concentric guide rings 12, the latter are arranged eccentrically to the pedal shaft.

   The guide rings 12 are fastened to the frame tube part 14 by means of clamps 13. The pedal bracket is in the extreme position when the pedal lever is moved downwards in the direction of arrow I; this results in a greater torque.



  When turning further, the roller 11 and with it the pedal 6, following the shape of the guide 1.2, pushed against the bottom bracket hub ver, that is, the effective pedal lever length is shortened. This means a relief for the driver while the pedal is being raised.



  The pedal bracket 5 slides between Wal zen 15, which are mounted in strips 16. The strips 16 are held in the arm by means of screws 17 ben. A cover 18 sits on the pedal lever as an external closure.

Claims (1)

PATENTANSPRUCH: Fahrradantrieb mit in seiner wirksamen Länge veränderlichem Trethebel, dadurch gekennzeichnet, daB längs eines Armes des Trethebels ein Pedalträger verschiebbar und am Fahrradrahmen eine Führung für diesen Pedalträger angeordnet ist, wobei die Füh rung so geformt ist, daB der Pedalträger wäh rend des Aufsteigens des Trethebels gegen die Tretlagerachse hin verschoben und damit die wirksame Länge des Trethebels verkürzt wird. UNTERANSPRÜCHE: 1. PATENT CLAIM: Bicycle drive with a pedal lever whose effective length can be changed, characterized in that a pedal bracket is displaceable along one arm of the pedal lever and a guide for this pedal bracket is arranged on the bicycle frame, the guide being shaped so that the pedal bracket during the ascent of the The pedal lever is shifted towards the bottom bracket axle and thus the effective length of the pedal lever is shortened. SUBCLAIMS: 1. Fahrradantrieb nach Patentanspruch, dadurch gekennzeichnet, dass der Pedalträger (5) in einer Ausnehmung des Armes ver schiebbar angeordnet ist. 2. Fahrradantrieb nach Patentanspruch und Unteranspruch 1, dadurch gekennzeich net, dass am Pedalträger eine Rolle (11) vor gesehen ist, die in der Führung (12) laufend den Pedalträger (5) in Längsrichtung ver schiebt. Bicycle drive according to patent claim, characterized in that the pedal support (5) is arranged so as to be displaceable in a recess in the arm. 2. Bicycle drive according to claim and dependent claim 1, characterized in that a roller (11) is seen in front of the pedal bracket, which in the guide (12) continuously pushes the pedal bracket (5) in the longitudinal direction ver.
CH224823D 1941-10-23 1941-10-23 Bicycle drive with a pedal lever that can be changed in its effective length. CH224823A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH224823T 1941-10-23

Publications (1)

Publication Number Publication Date
CH224823A true CH224823A (en) 1942-12-15

Family

ID=4453741

Family Applications (1)

Application Number Title Priority Date Filing Date
CH224823D CH224823A (en) 1941-10-23 1941-10-23 Bicycle drive with a pedal lever that can be changed in its effective length.

Country Status (1)

Country Link
CH (1) CH224823A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0093201A2 (en) * 1982-04-30 1983-11-09 Freder Stuckenbrok Driving means for bicycles and the like
DE3511502A1 (en) * 1985-03-29 1986-10-09 Freder 2933 Jade Stuckenbrok Pedal crank for a pedal crank drive for bicycles or the like
DE3511483A1 (en) * 1985-03-29 1986-10-09 Freder 2933 Jade Stuckenbrok Pedal crank for a pedal crank drive for bicycles or the like
US4807491A (en) * 1985-03-29 1989-02-28 Freder Stuckenbrok Pedal crank as well as a pedal crank drive for bicycles or the like and a mounting for such a pedal crank drive
AT390934B (en) * 1981-11-09 1990-07-25 Jentschmann Jakob Fa CRANKSET DRIVE FOR A BICYCLE
US5882025A (en) * 1991-11-22 1999-03-16 Runnels; David J. Bicycle with rhombus-like gear with circularly curved apexes
EP1160153A3 (en) * 2000-06-01 2002-05-15 Sasti S.R.L. Pedal-operated drive unit for bicycles or the like

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT390934B (en) * 1981-11-09 1990-07-25 Jentschmann Jakob Fa CRANKSET DRIVE FOR A BICYCLE
EP0093201A2 (en) * 1982-04-30 1983-11-09 Freder Stuckenbrok Driving means for bicycles and the like
DE3216069A1 (en) * 1982-04-30 1983-11-10 Freder 2933 Jade Stuckenbrok DRIVE DEVICE FOR BICYCLES OR THE LIKE
EP0093201A3 (en) * 1982-04-30 1985-05-29 Freder Stuckenbrok Driving means for bicycles and the like
DE3511502A1 (en) * 1985-03-29 1986-10-09 Freder 2933 Jade Stuckenbrok Pedal crank for a pedal crank drive for bicycles or the like
DE3511483A1 (en) * 1985-03-29 1986-10-09 Freder 2933 Jade Stuckenbrok Pedal crank for a pedal crank drive for bicycles or the like
US4807491A (en) * 1985-03-29 1989-02-28 Freder Stuckenbrok Pedal crank as well as a pedal crank drive for bicycles or the like and a mounting for such a pedal crank drive
US5882025A (en) * 1991-11-22 1999-03-16 Runnels; David J. Bicycle with rhombus-like gear with circularly curved apexes
EP1160153A3 (en) * 2000-06-01 2002-05-15 Sasti S.R.L. Pedal-operated drive unit for bicycles or the like
US6487933B2 (en) 2000-06-01 2002-12-03 Sasti S.R.L. Pedal-operated drive unit for bicycles or the like

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