• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Bicycle pedal, with extendable cranks, in which both cranks incorporate an extension (4) that incorporates at the end a bearing for an axle (10) in which the corresponding pedal (7) is fixed at the outer end, while by the inner end it is axially connected in an eccentric (9), on whose eccentric axis (7) a second connecting rod (6) is coupled, which engages in a fixed point (8) of the main connecting rod (3), so that turning the axis (10) of the pedal causes the displacement of the extension (4), lengthening or shortening the length of the pedaling lever formed by the connecting rod (3) and its corresponding extension (4), depending on the pedal in drive or recovery position, respectively.
    公开号:ES2571458A9
    申请号:ES201531888
    申请日:2015-12-23
    公开日:2017-02-09
    发明作者:Fernando IRUJO LÓPEZ
    申请人:Gazpio 4 SL；Gazpio 4 S L；
    IPC主号:
    专利说明:

    Bicycle pedal, with extendable cranks. 5 Object of the invention
    The present invention relates to a device for pedaling a bicycle, comprising two connecting rods mounted in opposite directions at the ends of a bottom bracket, located in the existing hub in the lower frame of the frame of a bicycle; 10 in which both cranks form two cranks, each of which has a pedal at the end. Specifically, it is a device in which these connecting rods incorporate a synchronized lengthening and shortening mechanism, the lever arm being lengthened in the driving rod (forward and downward) while the lever arm is shortened in the recovery rod. (whose pedal is up and in the
    15 that usually no impulse is exerted). Background of the invention
    In recent years, bicycles have experienced many technological advances
    20 to reduce the effort of pedaling for your locomotion. These designs include several attempts to modify the length of the cranks of the pedals, synchronizing that change in length with the movement of the pedals, to achieve a cyclic extension and retraction, to take full advantage of the force exerted on the pedals. Mechanisms for this purpose are described in several documents of
    25 patents:
    Document ES 0 460 074 describes a bicycle pedal mechanism with variable geometry, in which a crank is constituted by two telescopic elements, one openwork in the bottom bracket axis and the other adjusted to a mechanism that
    30 by printing an alternative radial movement such that the length of the crank varies at each turn of the bottom bracket between a maximum value and a minimum value, said mechanism comprising a circular toothed part, coaxial to the bottom bracket, with a planetary gear that moves the rotational movement in an alternative movement of the second element of the crank.


    Document ES 2 268 911 describes a power transmission system by elliptical pedaling with connecting rods of variable length, applicable to bicycles, formed by a power transmitter support and by an auxiliary mechanism whose internal movement is performed by chain and toothed sprockets. The transmitter support converts the 5 components perpendicular to the power rod at the time of transmission and the auxiliary mechanism, by means of a static gear and a satellite gear with half the diameter that the static gear rotates around it, produces a longitudinal movement of the connecting rod by means of a crank and a cam follower; causing the length of the connecting rod to vary and the pedals to describe a trajectory
    10 elliptical. The transmitter support and auxiliary mechanism are located on each side of the bottom bracket, fixed on the right side to the toothed plates of the bicycle.
    Due to their lack of reliability and flexibility, these cranks have never been imposed in the bicycle market; among other reasons because in the mechanics of pedaling, in particular when high rates are used, the use of systems with elliptical paths is counterproductive, since the proper way of transforming the alternative movement of the cyclist's legs is circumferential rotation, such and as it has been proven in several studies on pedaling dynamics and is revealed by any user of an exercise bike
    20 elliptical, in which we never get used to this unnatural movement at all. Description of the invention
    The present invention aims to overcome these drawbacks and to this effect a device has been designed to give pedals of the type specified in the introduction, characterized in that the elongation of the driving rod (forward and downward) is achieved while shortening the connecting rod in recovery (whose pedal is up and in which no impulse is usually exerted); performing a
    30 circular movement equal to that of a traditional bicycle, but on a lever arm of variable length, maximum in the position on the driving rod is in horizontal position and minimum in the horizontal position of the rod in recovery and half in a coincident point with dead spots, when the cranks are positioned vertically.


    In the device of the invention it is the pedals, which are necessarily placed at a substantially horizontal position at all times, which determine the degree of expansion of the respective driving rod and the retraction of the connecting rod in recovery. And so, from the position of the connecting rod in vertical upwards and as 5 begins to lower the driving rod is lengthening, reaching the maximum length when it is in horizontal position forward. On the contrary when the connecting rod returns from behind (in recovery) from the vertical position downwards, to the vertical position upwards, it is placed in its shortest position. In general, the axis of a pedal describes a circular movement, but in this case its center does not correspond
    10 with the bottom bracket axis, but is placed ahead of it, being in the return (the rise of the rear pedal) when it describes a circumference with a smaller radius, while in the advance (when the front pedal is pressed) when the radius of the described curve reaches its greatest length; but at all times the sum of the opposite radii is constant.
    15 This solution provides an extendable crank of simple design that offers a good pedaling comfort to the user, because the elongation is progressive, occurs in the arms of the cranks and enjoys a satisfactory degree of reliability due to the absence of any system of Gears in its mechanism. Unlike with others
    20 solutions The proposed pedal system allows to obtain with a crank set of conventional length, appropriate to the size of the cyclist, a greater pedaling moment in the proportion in which an elongation in the driving rod is achieved, when the pedal is pressed advanced.
    According to an embodiment of the invention both connecting rods mounted on the bottom bracket incorporate a longitudinal extension, which at the end incorporates a transverse bearing for the corresponding pedal axis. On this axis, the corresponding pedal is fixed at the outer end; while on the inner end it is axially connected in an eccentric, on whose eccentric axis a
    30 second connecting rod that is fixed at a stable point of the main connecting rod; so that the rotation of the pedal axis determines the displacement of the extension, lengthening or shortening the length of the pedaling lever formed by the main connecting rod and its corresponding extension, depending on whether the pedal is in the driving or recovery position, respectively .


    The displacement of the existing extension in the main connecting rod is carried out by means of a linear bearing, which is either integrated inside said connecting rod, or in a supplementary piece that is fixed close to the end of the main connecting rod when It is a conventional connecting rod. So, this device can be mounted
    5 on a bottom bracket with newly designed connecting rods according to the specifications set forth above, or also on conventional connecting rods, in which the pedal must be removed from its original position, subsequently mounted on the extension incorporated in this connecting rod Implement this device on it.
    10 It is also planned to be able to regulate the position of the pedal when it passes through the dead spots located on the vertical axis of the pedaling path, allowing it to advance slightly to avoid that its passage through this position does not cause a slight pull back and the advance of the pedal is performed without noticing the transition through these points. This regulation can be done by slightly modifying the position of the
    Eccentric in its fixation to the pedal axis, for example by means of a screw; or by varying the position in which the pedal is fixed on its axis, for example by means of an arched window, facing another with a hole, respectively associated with the pedal and the pedal, so that by means of a screw that the relationship can be placed the pedal in a conveniently forward position
    20 when it passes through the dead spots located on the vertical axis of the pedaling path, to facilitate preventing the upper pedal from being pulled back when it passes through this area.
    It is also planned to regulate the extension and compression of the cranks; for
    25 The position of the point at which the auxiliary connecting rod is fixed on the main connecting rod must be varied, in order to be able to lengthen or shorten the length of the extension that protrudes from the main connecting rod and complements it. Depending on whether we are facing a newly designed connecting rod, in which case it is sufficient to establish this point by means of a screw that slides along a longitudinal guide existing on the outer face of the first connecting rod,
    30 that is immobilized by a threaded solution; or if we have mounted this device at the end of a conventional connecting rod, in which case it is provided that the fixing point of the second connecting rod is established by several holes or an arched window made in a fixed support in relation to the main connecting rod, on the supplementary part fixed at the end of it, with a transverse fixing screw
    35 in an established position.

    Description of the figures
    To complement the description that is being made and in order to facilitate theunderstanding of the features of the invention, is accompanied by the present5 descriptive memory a set of drawings in which, for illustrative purposes and notlimiting, the following has been represented:
    Figure 1 shows a plan view, with a partial section, when the pedals in horizontal position, in which it is appreciated how the drive pedal has a lever
    10 pedaling with a radio
    D
    which is significantly larger than the pedal in recovery
    d.
    Figure 2 is a side elevation view of the previous one.
    15 Figure 3 is a schematic view of the connecting rods when they are placed in extreme positions (horizontal or vertical), as well as the circular path described by each pedal.
    Figure 4 shows paths in elevation and plan of this device implemented 20 on conventional connecting rods (3).
    Figure 5 shows views of a detail of the coupling between the axis (10) of the pedal and the pedal itself (11), through a mechanism that allows slightly varying the angle they form to conveniently advance or delay pedaling, in
    25 concrete when the pedals go through dead spots. Preferred Embodiment of the Invention
    As can be seen in the referenced figures, the bike pedal (1) object
    30 of the invention mounts on both ends of a bottom bracket (2) connecting rods (3) that have a movable extension (4), associated by a mechanism that causes its elongation and shortening, synchronized with the position of the pedal (11) in its rotation around the bottom bracket (2), so that the lever arm is lengthened in the drive rod (forward and down), while the lever arm is shortened in the
    35 connecting rod in recovery (whose pedal is up and usually does not exert any momentum). For this, each of the connecting rods (3) incorporates an extension (4) that


    It mounts at the end a bearing in which the axis (10) of the pedal (11) rotates, which is fixed on it through a fixed or movable solution. On the inner end, opposite the pedal (11), on the shaft (10) an eccentric (9) is fixed, whose eccentric shaft (7) is coupled with a second connecting rod (6), whose opposite end links at a fixed point (8) with the 5 main connecting rod (3). In this way when turning the axis (10) of the pedal, since it is always placed in a horizontal position, conveniently coupled to the cyclist's shoe by means of the calapies (12), with respect to the bearing located at the end of the extension (4 ) and therefore the eccentric (9) with respect to it causes the reciprocating movement (elongation / shortening) of the extension (4) with respect to 10 the main rod (3); which translates into a larger lever arm when the pedal
    (11) is in a driving situation, in front of the bottom bracket (2) and smaller in the connecting rod that is in the recovery position, behind said shaft (2). The proportion of elongation is what motivates the increase of the pedaling power with the same effort of the cyclist, and all this executing a uniform and equivalent pedaling radius
    15 to that of a bicycle with conventional cranks of the same size. (See figure 3).
    In figures 1 and 2 an embodiment is seen in which the longitudinal displacement of the extension (4) with respect to the main connecting rod (3) is carried out by means of a linear bearing (5) which is integrated into the interior of the main connecting rod (3).
    However, in the embodiment shown in Figure 4, this linear bearing (5) is integrated in a supplementary part (13) that is fixed close to the end of each main connecting rod (3), conventional, which in this case constitutes the base of this device.
    25 This device can be integrated into a bicycle with newly designed cranks, such as those shown in figures 1 and 2, or on a bicycle with conventional cranks, such as the one shown in figure 4, mounted in this case on the end of each connecting rod, taking advantage of the threaded hole in which the pedal is normally fixed. This second solution allows to apply this crank extension system, with a smaller
    30 added cost, on any bicycle since it is not necessary to purchase the newly designed cranks.
    To avoid the effect of
    chopped
    which occurs when the pedals pass through the dead spots located on the vertical of the bottom bracket (2), or it is possible to modify the position of the eccentric (9) in its fixation on the axis (10) of the pedal ( 11) by means of a movable solution, for example a simple screw at that point that when


    loosen it slightly allow the eccentric to rotate conveniently. Figure 5 shows a variant in which what is changed is the position of the pedal (11) with respect to the axis (10); in this case the pedal (11) can also be conventional with a bearing that allows its rotation and with an lug provided with an arched window
    5 (18), which faces another fixed on the shaft (10), suitable for fixing the pedal (11) in the ideal position by means of a screw (17) that establishes the appropriate angle to be formed by the eccentric ( 9) when the pedal is horizontal at this point.
    The eccentric (9) can take a circular shape, or form a lever as in the
    10 example represented. This constitution, together with the provision of the above-mentioned pedal position fixing flaps (11) placed in the lower part thereof, form a counterweight that makes it easier for the pedal to be positioned horizontally at all times, which facilitates the placement of the feet to the cyclist automatically in it, without looking down.
    15 Figure 4 shows a solution to lengthen or shorten the length, minimum and maximum, of extension of the piece (4); for this it is necessary to modify the point (8) at which the second connecting rod (6) is fixed on the main connecting rod (3). In this case the complementary piece (13) has a support (15), in which there are several holes (16)
    20 suitable for fixing the secondary connecting rod (6) in a more advanced or delayed position. An alternative solution could also be that of an arched window in which to move this coupling point and leave it set in a fixed place by tightening a simple screw, so that the cyclist himself could do it in motion, to adapt the composition pedaling depending for example on the area by the
    25 that your march or career passes. In the newly designed embodiment, shown in Figure 1, the fixing point (8) of the second connecting rod (6) can be established by means of a screw that slides through an existing longitudinal guide on the outer face of the first connecting rod (3 ) immobilizing by means of a threaded solution; in which case the cyclist could also adapt it on the fly.
    30 Figure 6 shows a solution in which the eccentric shaft (7) of the eccentric (9), in which the second connecting rod (6) is fitted, is mounted on a ratchet type bearing
    (19) or a freewheel type bearing, the purpose of which is to prevent the movement of the pedal axis (10) in the opposite direction of travel. In this case the axis (10) of the
    The pedal, at the outer end, is coupled to a second eccentric (20), whose eccentric axis is diametrically opposite the axis (7) and incorporates in it the corresponding


    pedal axis (11); in such a way that the extensions of both eccentrics (9, 20) are added, lengthening or shortening the length of the pedaling lever formed by the connecting rod (3) and its corresponding extension (4), depending on whether the pedal is in position of impulsion or recovery, respectively.
    To avoid turning back when this second eccentric (20) exists, it can also be achieved if instead of placing the ratchet or freewheel bearing (23) at the end of the second connecting rod (6) it is placed at the end of the extension (4), as shown in figure 7, since also in this position it complies with the
    10 aim to prevent displacement of the axis (10) of the pedal in the opposite direction of pedaling.
    An alternative solution is also provided, as shown in Figures 6 and 7, where the pedal (11) is mounted on the eccentric shaft of the eccentric (20) through a bearing and not fixed as in all The above solutions. In this case it is necessary, as in the previous examples, to immobilize it with respect to its axis so that when it is moved during pedaling, it makes the movement of the eccentrics and therefore the shortening and lengthening of the main connecting rod (3), through its extension (4). In order to allow at any given time the cyclist 20 to move the bottom bracket in the opposite direction, or to stop pedaling, a plate (22) is provided on the outer face of the outer eccentric (20) a recess for a ball (21) that is embedded by the action of a spring in it, marking the operating position of the pedal (11) with respect to the eccentric (20), but also allows its disengagement and therefore turning the pedal in the opposite direction to
    25 pedaling each time the ball (21) leaves said recess.
    Once the nature of the invention has been sufficiently described, as well as a preferred embodiment, it is stated for the appropriate purposes that the materials, shape, size and arrangement of the elements described may be modified,
    30 provided that this does not imply an alteration of the essential characteristics of the invention that are claimed below:

    权利要求:
    Claims (7)
    [1]
    1.-Bicycle pedal, with extendable cranks, in which both cranks incorporate a synchronized lengthening and shortening mechanism, the 5-lever arm being lengthened in the driving rod (forward and down) while the lever arm is shortened in the crank in recovery (whose pedal is in rise and in which usually no impulse is exerted), characterized in that both cranks (3) incorporate an extension (4), mounted longitudinally in each of them through a bearing linear (5), said extension (4) comprising at the end a bearing for a shaft (10) in which the corresponding pedal (7) is fixed at the outer end, while at the end it is axially connected in a eccentric (9), on whose eccentric shaft (7) a second connecting rod (6) is coupled, which engages at a fixed point (8) of the main connecting rod (3), establishing the rotation of the pedal axis (10) the extension offset (4), lengthening or shortening or the lever length of
    15 pedaling formed by the connecting rod (3) and its corresponding extension (4), depending on whether the pedal is in the drive or recovery position, respectively.
    [2]
    2. Pedal according to claim 1, characterized in that the linear bearing (5) in which the extension (4) is moved is integrated inside the main rod 20 (3).
    [3]
    3. Pedal according to claim 1, characterized in that the linear bearing (5) in which the extension (4) is displaced is integrated in a supplementary piece (13) that is fixed close to the end of each main rod ( 3),
    25 conventional.
    [4]
    4.-Pedal, according to any of the preceding claims, characterized in that the eccentric (9) is fixed on the axis (10) of the pedal (11) by means of a movable solution, suitable for advancing the extension position (4) when the pedal passes
    30 for the dead spots located on the vertical axis of the pedaling path, to facilitate the advance of the connecting rod when they pass through this area.
    [5]
    5.-Pedal, according to any of the preceding claims, characterized in that the pedal (11) is fixed on the shaft (10) by means of a movable solution, suitable for advancing the extension position (4) when the connecting rods pass for the points

    dead located on the vertical axis of the pedaling path, to facilitate its progress in this area.
    [6]
    6. Pedal according to claim 5, characterized in that the lower face of the
    5 pedal (11) has a lug provided with an arched window (18), facing another fixed on the axis (10), suitable for fixing the pedal (11) in a position such that the extension (4) is conveniently advanced when the pedal passes through the dead spots located on the vertical axis of the pedaling path, to facilitate the advancement of the connecting rods when they pass through this area.
    7. Pedal, according to any of the preceding claims, characterized in that the second connecting rod (6) is fixed on the main connecting rod (3) at a movable point (8), suitable for lengthening or shortening the length of the extension (4) protruding from the main rod (3).
    8. Pedal according to claim 7, characterized in that the fixing point (8) of the second connecting rod (6) is established by a screw that slides along a longitudinal guide existing in the external face of the first connecting rod (3) , which has some means of immobilization.
    9. Pedal according to claim 7, characterized in that the fixing point (8) of the second connecting rod (6) is established by several holes (16) located in a support (15), fixed in relation to the main connecting rod (3), on itself or on a supplementary piece (13) fixed on a conventional connecting rod.
    10. Pedal according to any of the preceding claims, characterized in that the eccentric shaft (7) of the eccentric (9), in which the second connecting rod (6) is coupled, is mounted on a ratchet type bearing (19 ) or a freewheel type bearing, while the axis (10) of the pedal at the outer end is engaged in a second
    30 eccentric (20), whose eccentric axis is diametrically opposite the axis (7), the corresponding pedal (11) being mounted on it, adding the extension of both eccentrics (9, 20) in the lengthening or shortening of the lever length pedaling formed by the connecting rod (3) and its corresponding extension (4), depending on whether the pedal is in the driving or recovery position, respectively.

    [11]
    11.-Pedal, according to any of the preceding claims, characterized in that the pedal (11) is mounted on its axis through a bearing, in this case the shaft (10) or the eccentric (20) having an external plate (22) ) that has a recess that accommodates a ball (21) that is embedded in it by the action of a
    5 spring, which marks the operating position of the pedal (11) with respect to the axis, allowing the disengagement of this interlock to rotate the pedal in the opposite direction to the pedaling each time the ball (21) leaves said recess.




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    同族专利:
    公开号 | 公开日
    ES2571458A1|2016-05-25|
    WO2017109247A1|2017-06-29|
    ES2571458B1|2017-01-30|
    EP3395662B1|2019-10-02|
    ES2571458B9|2017-02-20|
    EP3395662A1|2018-10-31|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    DE81523C|
    FR659222A|1927-12-10|1929-06-26|Extendable crank device for cycles and other applications|
    DE847867C|1950-02-18|1952-08-28|Helmuth Sell|Pedal crank with automatically changing length, especially for bicycles|
    FR2427242A1|1978-05-31|1979-12-28|Verdaguer Armand|Bicycle pedal mechanism - has telescopic crank arms to superimpose reciprocating linear movement on pedals as they rotate|
    US4772252A|1986-12-19|1988-09-20|Licencia Talalmanyokat Ertekesito Es Innovacios Kulkereskedelmi Vallalat|Driving gear for vehicles particularly for bicycles|
    US4882945A|1989-04-17|1989-11-28|Jose Trevizo|Pedal extension device|
    US5095772A|1990-06-07|1992-03-17|Tom Fortson|Bicycle pedal extension|
    AU3444599A|1999-03-02|2000-09-21|Doo-Kyung Jung|Drive system for bicycles|
    US6802798B1|2003-06-20|2004-10-12|Steve Sijet Zeng|Adjustable Gemini pedal trace extending crank mechanism|
    ITMI20110085A1|2011-01-25|2012-07-26|Zeno Zani|BICYCLE PEDIVALLY MECHANISM|WO2018146703A1|2017-02-10|2018-08-16|Pressofusione Saccense S.R.L.|Mechanism for generating a motion of rotation with double thrust lever having variable arm|
    US20180236294A1|2017-02-21|2018-08-23|Cecil Neil FROST|Stationary exercise machine|
    法律状态:
    2017-01-30| FG2A| Definitive protection|Ref document number: 2571458 Country of ref document: ES Kind code of ref document: B1 Effective date: 20170130 |
    优先权:
    申请号 | 申请日 | 专利标题
    ES201531888A|ES2571458B9|2015-12-23|2015-12-23|Bicycle pedal, with extendable cranks|ES201531888A| ES2571458B9|2015-12-23|2015-12-23|Bicycle pedal, with extendable cranks|
    EP16831893.9A| EP3395662B1|2015-12-23|2016-12-12|Extendable bicycle cranks|
    PCT/ES2016/070880| WO2017109247A1|2015-12-23|2016-12-12|Extendible bicycle cranks|
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