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
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)
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)
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 |
-
1941
- 1941-10-23 CH CH224823D patent/CH224823A/en unknown
Cited By (10)
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 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CH224823A (en) | Bicycle drive with a pedal lever that can be changed in its effective length. | |
DE1032476B (en) | Patient stretcher for X-ray diagnostics | |
AT155163B (en) | Switching device on change gears, in particular for bicycles. | |
DE2558604C2 (en) | Adjustment display device for manually operated turning spindles | |
DE744466C (en) | Switching device for chain-driven vehicles, especially pedal bikes | |
DE2363901C3 (en) | Device for adjusting the preload of torsion bar springs in motor vehicles | |
DE510647C (en) | Device for changing the tension of springs, which serve as a counterbalance for the slide of vertical milling machines | |
DE598109C (en) | Pressure wheel in the strand channel of a cigarette machine | |
AT111706B (en) | Device for moving and automatic holding of sliding windows or the like. | |
DE1505486A1 (en) | Gear shift device | |
AT153542B (en) | Variable ratio crank mechanism, especially for bicycles. | |
DE2155666A1 (en) | ||
AT53489B (en) | Drive device for driving uphill electric vehicles. | |
DE542219C (en) | Adjustment device for windshields of vehicles, in particular motor vehicles, which are pivotably arranged around the upper edge | |
DE102940C (en) | ||
DE471131C (en) | Internal band brake, especially for motor vehicles | |
AT163280B (en) | Braking device for bicycles or the like. | |
DE480137C (en) | Searchlights for motor vehicles | |
CH216095A (en) | Child seat for bicycles. | |
DE841412C (en) | scooter | |
DE1561468C (en) | Device for pulling on the ends of tube sections made of plastic film | |
DE435259C (en) | Mixing and kneading machine with a kneader driven by a crank and controlled by a handlebar | |
DE627452C (en) | Device for measuring the length of wires or ropes | |
AT34963B (en) | Tree felling machine. | |
DE1585209C (en) | Fabric winding device for chain knitting machines |