WO2007147909A1 - Ensemble de bielles et pédalier pour bicyclettes - Google Patents

Ensemble de bielles et pédalier pour bicyclettes Download PDF

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Publication number
WO2007147909A1
WO2007147909A1 PCT/ES2007/000160 ES2007000160W WO2007147909A1 WO 2007147909 A1 WO2007147909 A1 WO 2007147909A1 ES 2007000160 W ES2007000160 W ES 2007000160W WO 2007147909 A1 WO2007147909 A1 WO 2007147909A1
Authority
WO
WIPO (PCT)
Prior art keywords
connecting rod
screw
bottom bracket
head
shaft
Prior art date
Application number
PCT/ES2007/000160
Other languages
English (en)
Spanish (es)
Other versions
WO2007147909B1 (fr
Inventor
Pablo Carrasco Vergara
Original Assignee
Rotor Componentes Tecnológicos, S.L.
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 Rotor Componentes Tecnológicos, S.L. filed Critical Rotor Componentes Tecnológicos, S.L.
Publication of WO2007147909A1 publication Critical patent/WO2007147909A1/fr
Publication of WO2007147909B1 publication Critical patent/WO2007147909B1/fr

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C7/00—Connecting-rods or like links pivoted at both ends; Construction of connecting-rod heads
    • F16C7/02—Constructions of connecting-rods with constant length
    • 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
    • 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
    • B62M3/003—Combination of crank axles and bearings housed in the bottom bracket
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2326/00—Articles relating to transporting
    • F16C2326/20—Land vehicles
    • F16C2326/28—Bicycle propulsion, e.g. crankshaft and its support

Definitions

  • the present invention mainly applicable to bicycles, affects the cranks, the bottom bracket and the support of these on the bicycle, collecting a series of improvements aimed at the lightness and reliability of these power transmission elements in the bicycle.
  • connecting rods usually of aluminum (US6755095, US6612033, US6508002, US6314834, US6227070, EP1120336, US5988016), and of connecting rods made of fiber composite material carbon, which are usually filled with aluminum and foam inserts (US7013753, US6899402, EP1571075), which although they are more expensive and usually less reliable, of course they can become as light as hollow aluminum cranks, also having a Special claim possibly for being technologies of aerospace origin, or simply for fashion.
  • the axis can always enter from one of the sides, they are usually presented with a configuration called “integrated axis", so that the axis is integral with one of the connecting rods, thus forming a single piece “connecting rod-axis" of face to the user.
  • integral axis In the market there are axes of this form, integrated, some integral with the connecting rod on the side of the plates and others with the opposite connecting rod.
  • the axial fixation of the axis is determined by the distance between connecting rods, which enclose the assembly [bowl] - [bottom bracket] - [bowl]. Since said bottom bracket, which is part of the bicycle, is normally a piece of low precision, in general said axial fixation is an uncertain fixation, which to be solved proceeds in two different ways:
  • Variable connecting rod distance which is resolved by means of the sliding anchor of the non-integral connecting rod.
  • the shaft has a cylindrical drag profile that allows the crank to be displaced by means of a screw that pushes it to achieve the axial positioning of the crank, and it has a slot-shaped opening to allow it to easily enter and then hug the shaft using screws that close that slot (US6755095) materializing the radial fixation while ensuring the axial position.
  • connecting rods in this case the non-integral connecting rod has a fixed anchor, tightened by means of a thrust screw against a stop that forms the axis itself or simply a conical anchor. Since the distance between connecting rods cannot be varied, the way to compensate for this uncertainty is through the use of silly rings, rubber washers and wavy washers (which act as a spring).
  • the first option is the mechanically more logical and efficient solution, but there are connecting rods whose construction prevents that opening, as happens for example with most of the carbon fiber connecting rods. Also the use of screws to make the connecting rod jointly embrace the shaft (closing said groove) is seen in the market as an excess of weight to be considered. Which then leads to the second option. Then, said elastic elements generally serve to absorb the aforementioned axial uncertainty, but sometimes creating a new uncertainty in what refers to the axial force or preload on the bearings, which may be a key factor limiting the life of said bearings
  • a metal connecting rod preferably of high tensile strength and fatigue aluminum, is proposed, which in order to be light and cheap in its construction, is provided with a hole made in the head of the connecting rod - end of the connecting rod opposite the one that corresponds to the anchoring of the pedal - and which extends along the crank arm so that it defines a hollow connecting rod.
  • the connecting rod head In order to withstand the efforts around the entrance to said hole, the connecting rod head will have a protuberance or excess material at its end, so that once said hole is made, said protuberance will form a reinforcement ring - perpendicular to the connecting rod arm - capable of correctly transmitting the tangential stresses that occur when pedaling at the connecting rod head at its interface with the shaft, in addition to the tensile stresses that correspond to the expansive force generated by the shaft embedment in Ia connecting rod.
  • the shaft will be of asymmetric construction, and at its end intended to couple the sliding connecting rod, a factory assembly of said connecting rod will preferably be carried out, since there is no need for disassembly and assembly by the user.
  • This can be a coupling with high tightening and fixing power, for example a mounting with dilation of
  • the connecting rod by temperature rise, or by the use of retaining liquid of the anaerobic resin type of high residual resistance.
  • each bowl with a hemispherical cavity that seats a spherical section ring that in turn supports the bearing.
  • Said ring will have the inner cylindrical surface adjusting to the bearing, and the spherical outer surface thus allowing the bearing to be oriented in any direction. This will allow whatever the positioning between both cups, conditioned by the irregularities of the bottom bracket of the bicycle frame, the bearings can always be perfectly aligned. Once aligned, the own preload of the connecting rods on the bearings will ensure the positioning of two supports.
  • FIG. 1 is a perspective view of the crankset and bottom bracket objects of this patent, assembled in the part of the bicycle comprising the bottom bracket.
  • FIG. 2 shows the previous set that has been removed from the bicycle, the connecting rod on the side of the transmission is loose and the opposite one comes out integral with the axle.
  • FIG. 3 shows decoupled, the parts that intervene in the sliding joint that makes solidarity in FIG. 2 to the crank shaft assembly.
  • FIG. 4a and 4b correspond to a sectional view of said sliding joint in two different adjustment positions.
  • FIG. 5 corresponds to the plan view of the opposite connecting rod next to the plates.
  • FIG. 6 shows the two basic steps in the production of this connecting rod when machining from a bar: lathe and milling.
  • FIG. 7 shows the three parts that make up the connecting rod on the side of the transmission disassembled: crank arm, spider and nut.
  • FIG. 8 in a bottom plan view of this connecting rod shows what the drag profile for the spider is like.
  • FIG. 9 shows a bowl and corresponding bearing and bearing spherical ring.
  • FIG. 10 is a sectional view of the bottom bracket support assembly, showing both cups facing and misaligned, where it can be seen how the bearings remain aligned.
  • FIG. 11 is a profile view of the assembly of FIG-I, showing a cut line corresponding to the section of FIG-12.
  • FIG. 12 is a sectional view of the previous assembly according to that cutting line.
  • FIG. 13 shows a connecting rod axle clamp screw that incorporates a clamping lock.
  • the proposed embodiment is actually the sum of several mechanical solutions that affect the cranks and the bottom bracket of the bicycle.
  • the bottom bracket (3) has a spline of cylindrical generation (38) at its left end, without close limits that prevent the sliding of its corresponding connecting rod (1) in both directions, for its subsequent adjustment to the actual measurement of the bottom bracket (0), so as to avoid both possible axial clearance and excessive axial load on the bearings.
  • a spline of cylindrical generation (38) at its left end, without close limits that prevent the sliding of its corresponding connecting rod (1) in both directions, for its subsequent adjustment to the actual measurement of the bottom bracket (0), so as to avoid both possible axial clearance and excessive axial load on the bearings.
  • At its right end it will have an insert without such a degree of freedom, which in this case is tapered (39) for less suffering from wear - or even chip removal as occurs in many cylindrical inserts - in each disassembly operation and assembly of its corresponding connecting rod (2).
  • Said screw can be defined as a threaded body with a threaded head, the thread (83) of the body of the pitch screw being significantly greater than the thread (82) of said head.
  • the thread of the passage body being 1.5 mm and the head of 0.5 mm, for every two left turns of the screw (8), the shaft (3) will distance 2 mm of the connecting rod (1), while the screw, in the opposite direction, will only do 1 mm. Both threads have the same direction of rotation, the screw entering the shaft and the connecting rod from the outside, since it is convenient that the diameter of the head be of a diameter substantially greater than that of the body having a shorter length.
  • crank and axle assembly will be presented in a "semi-integrated" shaft configuration. That is, a disassembled connecting rod of the shaft - which is somewhat generalized - in this case the right connecting rod (2), and the other, the left one (1), will be integral with the shaft but with an advance recess adjustable by means of said screw ( 8) double thread.
  • said screw ( 8) double thread
  • connecting rods (1 and 2) a solution is proposed in which it is based on high strength aluminum alloy in round extrusion bar, since it has excellent mechanical properties thanks to the orientation of the fibers.
  • Said bar is machined on the lathe to achieve the preform (the) whose revolution profile is the outer profile of the connecting rod, and it is drilled to achieve the desired cavity (10) - without going through this hole the whole piece -.
  • the entire piece is parallel to the direction of the metal fiber, oriented in the extrusion direction, the high properties of the source metal are ensured.
  • Said preform has at its only end to drill a protrusion that once the hole is formed forms a ring (11), essential reinforcement for this opening. It is therefore a straight rod in its primitive form.
  • the right connecting rod (2) In the case of the right connecting rod (2), it will have a mechanized recess thus forming a drive gear (222) to couple the corresponding spider (22), in charge of coupling plates for chain transmission, and will also have necessary thread for the locking nut (23) of the spider. Said gear profile will affect only the lateral flanks of the connecting rod (2), so as not to interfere with the hole it passes through.
  • the use of a double-threaded screw for the assembly of the right connecting rod is also proposed, rather by maintaining a symmetry of understanding for the user of what occurs in the opposite connecting rod, although it also allows to save some weight, providing greater fineness of manipulation and greater security to prevent the screw from loosening, thanks to the reduction of the thread pitch.
  • the thread of the body of the screw is of 1 mm pitch and that of the 0/5 mm pitch head, which gives an advance per revolution of 0.5 mm between the shaft and the connecting rod.
  • an external bearing system is proposed compatible with existing integrated connecting rod systems, but with the particularity that each bearing (43) sits on a carrier ring (42) with an outer surface spherical which acts as a patella with a spherical cavity practiced in the bowl (41). This will allow whatever the positioning between both cups (41 and 41 '), conditioned by the irregularities of the bottom bracket (0), the bearings (43 and 43') can always be perfectly aligned. Once aligned, the preload itself in the assembly of the connecting rods on the bearings will ensure the positioning of two spherical carrier rings.
  • a safety screw (88 in FIG-13) can be used to house its head and through it, so that it could be tightened to brake a Once the double thread screw reaches the desired position.
  • This safety screw could also be placed in different angular positions of said head, for example 8 regularly spaced possible housings, which, combined with the nine splines (18-38) for anchoring the shaft, allowed a fine adjustment where the safety screw could easily - every 2'5 ° - combine one of its possible housings with one of the grooves then making a function of a latch and not a brake.
  • Another connecting rod corresponding to this invention would also be constructed from a recessed connecting rod by means of the drill described above, to which the connecting rod arm is wrapped with a carbon fiber and resin sleeve, resulting in a hollow aluminum connecting rod, with a composite lining.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transportation (AREA)
  • Pivots And Pivotal Connections (AREA)
  • Steering Devices For Bicycles And Motorcycles (AREA)
  • Motorcycle And Bicycle Frame (AREA)

Abstract

L'invention concerne un ensemble de pédalier sous forme d'axe semi-intégré, de bielles creuses et cavités auto-alignées, l'assemblage entre l'axe et la bielle qu'il comprend étant coulissant, et incluant une vis à filetage double qui suivant le sens dans lequel elle est tournée permet d'augmenter ou de diminuer la distance finale entre les deux bielles. Cet ensemble permet d'éliminer le jeu et de régler la précharge des roulements; les bielles sont perforées par le biais d'une perceuse à l'opposé, par exemple, de la pédale, mais supportent un anneau de renforcement à l'entrée du trou; et les cavités de leur côté offrent un logement de rotule aux roulements par le biais d'anneaux respectifs à surface extérieure sphérique.
PCT/ES2007/000160 2006-06-14 2007-03-22 Ensemble de bielles et pédalier pour bicyclettes WO2007147909A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
ESP200601595 2006-06-14
ES200601595 2006-06-14

Publications (2)

Publication Number Publication Date
WO2007147909A1 true WO2007147909A1 (fr) 2007-12-27
WO2007147909B1 WO2007147909B1 (fr) 2008-02-07

Family

ID=38833097

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/ES2007/000160 WO2007147909A1 (fr) 2006-06-14 2007-03-22 Ensemble de bielles et pédalier pour bicyclettes

Country Status (2)

Country Link
TW (1) TW200804130A (fr)
WO (1) WO2007147909A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2002793C2 (en) * 2009-04-24 2010-10-26 Ricardo Mohan Wert Bicycle crank system.
WO2017222401A1 (fr) * 2016-06-24 2017-12-28 Miranda & Irmão, Lda. Pédalier modulaire pour vélos
US11130546B2 (en) * 2009-04-29 2021-09-28 Fox Factory, Inc. Bicycle crank arm and insert therefore
US11359709B2 (en) 2018-12-18 2022-06-14 Fox Factory, Inc. Chainring
US11680633B2 (en) 2019-02-08 2023-06-20 Fox Factory, Inc. Chainring
US11788615B2 (en) 2016-04-11 2023-10-17 Fox Factory, Inc. Bicycle front sprocket
US11851135B2 (en) 2017-04-28 2023-12-26 Fox Factory, Inc. Cinch direct mount 2X ring system

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2002089A (en) * 1977-07-12 1979-02-14 Shimano Industrial Co A crank assembly for a cycle
JPS6256614A (ja) * 1985-05-08 1987-03-12 Masahiro Morita 自動調心軸受ユニツト
US4708499A (en) * 1985-08-16 1987-11-24 Skf Gleitlager Gmbh Pivot bearing for steering columns of motor vehicles
US4728202A (en) * 1987-01-14 1988-03-01 Emerson Electric Co. Shaft locking collar for bearing assemblies
EP1120336A2 (fr) * 2000-01-26 2001-08-01 Cannondale Corporation Pédalier et composants pour ce pédalier
US20020081047A1 (en) * 2000-12-12 2002-06-27 Elio Zoppitelli Bearing assembly for a helicopter rear transmission shaft
US6755095B2 (en) * 2001-11-23 2004-06-29 Shimano, Inc. Bicycle crank assembly and assembly tools
US20050081678A1 (en) * 2003-10-20 2005-04-21 Smith Garrett A. Bicycle crank assembly
US20060288818A1 (en) * 2005-06-23 2006-12-28 Campagnolo, S.R.L. Attachment group of a pedal crank to the central axle of a bottom bracket of a bicycle transmission

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2002089A (en) * 1977-07-12 1979-02-14 Shimano Industrial Co A crank assembly for a cycle
JPS6256614A (ja) * 1985-05-08 1987-03-12 Masahiro Morita 自動調心軸受ユニツト
US4708499A (en) * 1985-08-16 1987-11-24 Skf Gleitlager Gmbh Pivot bearing for steering columns of motor vehicles
US4728202A (en) * 1987-01-14 1988-03-01 Emerson Electric Co. Shaft locking collar for bearing assemblies
EP1120336A2 (fr) * 2000-01-26 2001-08-01 Cannondale Corporation Pédalier et composants pour ce pédalier
US20020081047A1 (en) * 2000-12-12 2002-06-27 Elio Zoppitelli Bearing assembly for a helicopter rear transmission shaft
US6755095B2 (en) * 2001-11-23 2004-06-29 Shimano, Inc. Bicycle crank assembly and assembly tools
US20050081678A1 (en) * 2003-10-20 2005-04-21 Smith Garrett A. Bicycle crank assembly
US20060288818A1 (en) * 2005-06-23 2006-12-28 Campagnolo, S.R.L. Attachment group of a pedal crank to the central axle of a bottom bracket of a bicycle transmission

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL2002793C2 (en) * 2009-04-24 2010-10-26 Ricardo Mohan Wert Bicycle crank system.
US11130546B2 (en) * 2009-04-29 2021-09-28 Fox Factory, Inc. Bicycle crank arm and insert therefore
US20210387694A1 (en) * 2009-04-29 2021-12-16 Fox Factory, Inc. Bicycle crank arm and insert therefore
US12024261B2 (en) 2009-04-29 2024-07-02 Fox Factory, Inc. Bicycle crank arm and insert therefore
US11691692B2 (en) 2009-04-29 2023-07-04 Fox Factory, Inc. Bicycle crank arm and insert therefore
US12060928B2 (en) 2016-04-11 2024-08-13 Fox Factory, Inc. Bicycle front sprocket
US11788615B2 (en) 2016-04-11 2023-10-17 Fox Factory, Inc. Bicycle front sprocket
WO2017222401A1 (fr) * 2016-06-24 2017-12-28 Miranda & Irmão, Lda. Pédalier modulaire pour vélos
WO2017220213A1 (fr) * 2016-06-24 2017-12-28 MIRANDA & IRMÃO, LDª Pédalier modulaire pour bicyclettes
US20190241233A1 (en) * 2016-06-24 2019-08-08 MIRANDA & IRMAO, LDa Modular crankset for bicycles
US10800481B2 (en) 2016-06-24 2020-10-13 MIRANDA & IRMAO, LDa Modular crankset for bicycles
US11999439B2 (en) 2017-04-28 2024-06-04 Fox Factory, Inc. Cinch direct mount 2X ring system
US11851135B2 (en) 2017-04-28 2023-12-26 Fox Factory, Inc. Cinch direct mount 2X ring system
US12091133B2 (en) 2017-04-28 2024-09-17 Fox Factory, Inc. Cinch direct mount 2X ring system
US12060929B2 (en) 2018-12-18 2024-08-13 Fox Factory, Inc. Chainring
US11359709B2 (en) 2018-12-18 2022-06-14 Fox Factory, Inc. Chainring
US11680633B2 (en) 2019-02-08 2023-06-20 Fox Factory, Inc. Chainring

Also Published As

Publication number Publication date
WO2007147909B1 (fr) 2008-02-07
TW200804130A (en) 2008-01-16

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