DE417318C - Pedal crank for bicycles - Google Patents
Pedal crank for bicyclesInfo
- Publication number
- DE417318C DE417318C DEK90072D DEK0090072D DE417318C DE 417318 C DE417318 C DE 417318C DE K90072 D DEK90072 D DE K90072D DE K0090072 D DEK0090072 D DE K0090072D DE 417318 C DE417318 C DE 417318C
- Authority
- DE
- Germany
- Prior art keywords
- pedal
- bicycles
- bearing
- crankshaft
- pedal crank
- Prior art date
- Legal status (The legal status 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 status listed.)
- Expired
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)
- Steering Devices For Bicycles And Motorcycles (AREA)
Description
Tretkurbel für Fahrräder. Die Erfindung bezieht sich auf die bekannte Tretkurbel für Fahrräder, deren Kurbelarm radial verschieblich an der Kurbelwelle gelagert ist, und deren Pedalachse am äußeren Ende gelenkig mit einem Lenker verbunden ist, der sich in einem am Fahrradrahmen befestigten, vor der Achse der Tretkurbelwelle liegenden Lager dreht, so daß die wirksame Länge der Kurbel beim Abwärtstreten erheblich größer ist als beim Aufwärtsgang.Pedal cranks for bicycles. The invention relates to the known Pedal crank for bicycles, the crank arm of which can be moved radially on the crankshaft is mounted, and the pedal axis is articulated to a handlebar at the outer end is, which is attached to a bicycle frame in front of the axis of the crankshaft lying bearing rotates, so that the effective length of the crank when stepping down considerably is greater than in the upward gear.
Die Erfindung besteht darin, daß der Träger des Lagers aus einem nach hinten offenen Bügel besteht, der am vorderen Schrägrohr des Rahmens befestigt ist. Gegenüber einer bekannten Einrichtung, bei der der Bügel nach hinten geschlossen ist, wird hier der Vorteil erreicht, daß hier, wo der Fuß nach hinten frei ist, die Exzentrizität des Lagers größer sein kann.The invention consists in that the carrier of the camp from one after there is an open bracket at the rear, which is attached to the front inclined tube of the frame. Compared to a known device in which the bracket closed to the rear is, here the advantage is achieved that here, where the foot is free to the rear, the eccentricity of the bearing can be greater.
In den Zeichnungen ist der Erfindungsgegenstand in einer Ausführungsform beispielsweise dargestellt, und zwar zeigt: Abb. i eine Tretkurbeleinrichtung in Seitenansicht, Abb. a dieselbe in Draufsicht und Abb.3 und ¢ zwei Einzelheiten.In the drawings, the subject matter of the invention is in one embodiment shown for example, namely shows: Fig. i a pedal crank device in Side view, Fig. A the same in plan view and Fig.3 and ¢ two details.
An dem vorderen Schrägrohr des Fahrradrahmens ist der nach hinten offene Bügel a befestigt, der beiderseits die Kugellager b für die Lenker c trägt. Der Lenker c trägt an seinem anderen Ende das Kugellager a', in dem die Pedalachse gelagert ist. Auf der anderen Seite ist die Pedalachse fest in den Kurbelarm f eingeschraubt. Die Tretkurbelwelle k trägt an jeder Seite einen Lagerkopf, der mit Walzen ,i und Kugeln k versehen ist und in dem der Kurbelarm f bei Drehung des Pedals s radial zur Welle k hin und her gleitet. Zum Schutze gegen Verschmutzung der Gleitlager im Lagerkopf ist der Kurbelarm mit zwei teleskopartig ausziehbaren Schutzhülsen g versehen.The one to the rear is on the front inclined tube of the bicycle frame open bracket a attached, which carries the ball bearings b for the handlebars c on both sides. The link c carries at its other end the ball bearing a ', in which the pedal axis is stored. On the other hand, the pedal axle is firmly screwed into the crank arm f. The pedal crankshaft k carries a bearing head on each side, which is equipped with rollers, i and Balls k is provided and in which the crank arm f when the pedal s is rotated radially to the shaft k slides back and forth. To protect against soiling of the plain bearings In the bearing head is the crank arm with two telescopic protective sleeves g provided.
Claims (1)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK90072D DE417318C (en) | Pedal crank for bicycles |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DEK90072D DE417318C (en) | Pedal crank for bicycles |
Publications (1)
Publication Number | Publication Date |
---|---|
DE417318C true DE417318C (en) | 1925-08-10 |
Family
ID=7236721
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DEK90072D Expired DE417318C (en) | Pedal crank for bicycles |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE417318C (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3133813A1 (en) * | 1981-08-25 | 1983-03-31 | Paul 1000 Berlin Lorenz | Pedal-crank drive for two- and multi-wheeled vehicles |
FR2693973A1 (en) * | 1992-07-24 | 1994-01-28 | Lemoine Constant | Extending pedal crank for bicycle - has sliding cranks in guides on crank axis with pedals bearing on rollers on circular crown with centre shifted from crank axis |
DE102004023091A1 (en) * | 2004-05-05 | 2005-12-01 | Kurt Oehlschlaeger | Foot pedal drive for e.g. bicycle, has guiding bar with two levers which are pivoted with their one end such that torque is produced downward via bar in interaction with forward affecting force, during progressive rotation of pedals |
BE1018752A4 (en) * | 2009-05-12 | 2011-08-02 | Beyens Florentius | CRANKSTEL FOR BIKE. |
-
0
- DE DEK90072D patent/DE417318C/en not_active Expired
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3133813A1 (en) * | 1981-08-25 | 1983-03-31 | Paul 1000 Berlin Lorenz | Pedal-crank drive for two- and multi-wheeled vehicles |
FR2693973A1 (en) * | 1992-07-24 | 1994-01-28 | Lemoine Constant | Extending pedal crank for bicycle - has sliding cranks in guides on crank axis with pedals bearing on rollers on circular crown with centre shifted from crank axis |
DE102004023091A1 (en) * | 2004-05-05 | 2005-12-01 | Kurt Oehlschlaeger | Foot pedal drive for e.g. bicycle, has guiding bar with two levers which are pivoted with their one end such that torque is produced downward via bar in interaction with forward affecting force, during progressive rotation of pedals |
DE102004023091B4 (en) * | 2004-05-05 | 2008-01-10 | Kurt Oehlschlaeger | Pedal crank drive for powered by muscle power devices, especially vehicles and exercise equipment |
DE102004023091B8 (en) * | 2004-05-05 | 2008-04-30 | Kurt Oehlschlaeger | Pedal crank drive for powered by muscle power devices, especially vehicles and exercise equipment |
BE1018752A4 (en) * | 2009-05-12 | 2011-08-02 | Beyens Florentius | CRANKSTEL FOR BIKE. |
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