• 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:
    Linear variation transmission mechanism. The transmission consists of a plate and/or a pinion of variable radius, associated with the corresponding transmission chain and that is constituted from a pair of pinion segments (11) and four guide rollers (15) for the chain that are linked through pins to drive discs or plates (7) and adjustment (9) by means of curved grooves (8-10), so that the relative rotation between plates causes inward or outward movement of the assembly that forms the wheel or pinion, which is achieved by means of adjusting rollers (16) that are applied between the flange (28) of an adjusting sleeve (21) and an outer shoulder (27) or flange on which the plate is finished adjustment (9), displacement that due to the configuration of said adjustment plate and adjustment bushing causes the relative angular displacement between the adjustment plate and the actuating plate (7). This movement is controlled through arms associated with the adjustment rollers, which in turn are controlled by a cable (1). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2784073A1
    申请号:ES201930248
    申请日:2019-03-19
    公开日:2020-09-21
    发明作者:Vasile Vintila
    申请人:Vasile Vintila；
    IPC主号:
    专利说明:

    [0002] Transmission mechanism of linear variation
    [0004] TECHNICAL SECTOR
    [0006] The present invention refers to a transmission mechanism, specially designed for bicycles or other vehicles that require similar performance, which has the special particularity of allowing the transmission ratio to be varied in a linear manner, that is, without the classic steps offered by the conventional transmissions.
    [0008] The mechanism of the invention can be single or double, that is to say, applied on the drive shaft, on the shaft to be moved or on both.
    [0010] BACKGROUND OF THE INVENTION
    [0012] As is known, in the field of practical application of the invention, transmission systems based on a driving axle or bottom bracket are known, associated with cranks, in which one or more crowns are established in which a chain selectively plays, which It is also adaptable to different pinions of different diameters and number of teeth associated with the hub of the driving wheel.
    [0014] Although through derailleurs the transmission ratio that you want to finally obtain in the driving wheel is regulated, the reality is that this type of transmissions, for many pinions / plates that participate in it, will always offer a staggered transmission change, so it is quite common for the transmission ratio in which the user is most comfortable to be found in some cases in an intermediate zone between two contiguous transmission ratios offered by the transmission, a relationship that is therefore impossible to reach.
    [0015] EXPLANATION OF THE INVENTION
    [0017] The linear variation transmission mechanism that is advocated solves in a fully satisfactory way the previously exposed problem, based on a solution that allows the size of the chain ring associated to the bottom bracket and / or the drive hub to be adjusted in a linear manner by means of the actuation of a cable, so that the transition in the change of gear ratios is completely linear and progressive, without steps.
    [0019] Ultimately, the transmission ratio is obtained by controlling the size of the chain ring and / or sprocket, within the limits allowed by the length of the chain. For this, the transmission will incorporate a chain tensioner, in its simplest version, in order that it always adapts perfectly to the selected transmission ratio, while said tensioner is not necessary in the version that affects both axles, for inasmuch as the increase of one ring is counteracted by the automatic decrease of the opposite and vice versa, that is, the chain is functionally tensioned.
    [0021] In order to reduce internal friction and extend service life, the entire transmission is supplied with an airtight case or casing, partially filled with lubricating oil at an optimal level.
    [0023] As mentioned previously, the speed ratio will be adjusted by the driver through a cable operated from the handlebar.
    [0025] The chain ring drive unit and the pinion drive unit are similar, but with opposite curved drive or adjustment grooves.
    [0027] More specifically, the drive unit is controlled through a control cable, which acts on a series of control arms or links, associated with a plurality of adjustment rollers, of trapezoidal section, whose apex is wedge-like It is intended to move vertically between the flange of an adjustment bushing and an outer shoulder or flange on which an adjusting disk or plate is finished, said adjusting bush being axially displaceable both with respect to the transmission hub or axis, as well as the adjustment plate by means of complementary ribs and holes, which make them solid in their turning movement.
    [0029] The adjusting bushing in the inoperative situation of the control cable and consequently of the adjusting rollers tends to press against an actuating plate, integral with the bottom bracket or hub, so that the adjusting plate has the toothing of its central hole inclined, so that the axial displacement of the adjusting sleeve causes a relative angular displacement of said adjusting plate with respect to the actuating plate.
    [0031] In this sense, both plates present paired curved grooves in the inoperative situation of the adjustment rollers, so that the mechanism has a symmetrical structure, in which two adjustment plates, two drive plates and two adjustment bushings participate, these being actuated. last by the corresponding adjustment rollers associated with the arms or control links.
    [0033] In this way, each pair of chainrings are linked to each other through a pair of sprocket segments and four guide rollers for the chain, all through pins movable on the grooves.
    [0035] More specifically, each unit is made up of:
    [0037] • 2 drive plates or discs with matching curved grooves, 2 adjusting plates or discs with matching curved grooves,
    [0038] • 2 pinion segments (each equipped with 2 different pins, 6 rollers and 2 mounting clips),
    [0039] • 4 chain guide rollers (each equipped with 1 pin, 4 rollers and 1 mounting clip),
    [0040] 2 gear ratio adjusting bushings with opposite outer grooves,
    [0041] • 2 bearings installed between drive plates and adjusting plates.
    [0043] The 2 pinion segments have a configuration such that, together with the 4 guide rollers chain, complete the shape of the sprocket in the minimum diameter provided for the transmission.
    [0045] Each segment has a long top pin that engages with the curved slots of the drive plates and adjusting plates and a short bottom pin that engages only with the slots in the drive plates, to prevent rotation when the chain is in gear. tension.
    [0047] The slip distance for the adjusting bushings, with tension on the transmission, is controlled by moving the adjusting rollers up or down, relative to the center of the bushing.
    [0049] The adjusting bushing hinge bearing has a sloped outer edge, at an angle calculated to provide optimal frictionless engagement with the tapered edge of the adjusting rollers.
    [0051] As mentioned above, the adjusting rollers are installed on the interconnected ratio control links, so that when the adjusting rollers of the chain ring drive unit are changing their position relative to the center from the hub, the rollers on the pinion drive unit will change their position in the opposite direction, by a corresponding amount allowed by the length of the chain.
    [0053] For its part, the basic transmission will only have one link on each side of the chain ring or pinion, depending on the location of the drive unit.
    [0055] In this way, a mechanism is achieved that allows the transmission ratio to be regulated continuously and linearly, without steps, allowing a much finer and more comfortable personalized adjustment.
    [0057] DESCRIPTION OF THE DRAWINGS
    [0059] To complement the description that is going to be made below and in order to help a better understanding of the characteristics of the invention, according to a preferred example of practical implementation thereof, it is attached as an integral part of said description, a set of plans where, for illustrative and non-limiting purposes, the following has been represented:
    [0061] Figure 1.- Shows a side elevation view of a linear variation transmission mechanism made in accordance with the object of the present invention, devoid of its corresponding casing.
    [0063] Figure 2.- Shows a plan view of the assembly of figure 1.
    [0065] Figure 3.- Shows a view of the device of figure 1, with its corresponding protective casing and on which the maximum and minimum positions of chain ring size are schematically represented, which allows the transmission to be obtained in a linear manner.
    [0067] Figure 4.- Shows a side elevation view of one of the drive plates that participate in the transmission of the invention.
    [0069] Figure 5.- Shows a side elevation view of one of the adjustment plates that participate in the transmission of the invention.
    [0071] Figure 6.- Shows a schematic detail of the arrangement of the pinion segments together with the chain guide rollers for the minimum ring diameter provided for the transmission.
    [0073] Figure 7.- Shows a more specific and exploded detail of the specific shape of the different elements that participate in figure 6.
    [0075] Figure 8.- Shows a profile view of the mechanism of the invention according to a vertical section plane at the level of the bottom bracket.
    [0077] Figure 9.- Shows a plan view of the control links that participate in the transmission of the invention, specifically a direct connection link.
    [0079] Figure 10.- Shows a plan view of the control links that participate in the transmission of the invention, specifically of an indirect feeder link.
    [0081] Figure 11.- Shows a side elevation view of the assembly represented in figure 10.
    [0083] Figure 12.- Finally, shows a detail of the rear hub free of rotation in only one direction in which the transmission of the invention is applicable.
    [0085] PREFERRED EMBODIMENT OF THE INVENTION
    [0087] In view of the outlined figures, it can be seen how the linear variation transmission mechanism proposed by the invention involves a control cable (1), associated with a control for regulating its length, duly established on the handlebar of the bicycle or vehicle in question, and that through its opposite end is linked to a plurality of arms or control links (2), through a mechanism (3-3 ') makes said arms or control links (2 ) are opened or closed completely progressively, regulating the configuration of one or two drive units (4-4 ') associated with the bottom bracket or the driving wheel hub, respectively, the transmission of the invention being able to include drive units. drive (4-4 ') associated with one, the other or both axles (bottom bracket / wheel hub), for which the number of control arms or links (2) will vary in each case, as well as the mechanism (3- 3 ') that allows to separate or bring said arms or links of connection troll.
    [0089] As shown in figure 3, the transmission will preferably be supplied protected by a casing (5), to which the cable (1) will reach, with an adequate oil level for its correct operation, and equipped with a central drain (6) that minimizes weights / volumes and facilitates its implementation.
    [0091] As can be seen in Figures 4 to 7, both the drive unit (4) of the chain ring and the drive unit
    [0093] • 2 drive discs or plates (7) with matching curved grooves (8), 2 adjustment discs or plates (9) with curved grooves (10) matched between both plates, so that the inclination of said grooves (8- 10) will be opposite in depending on whether it is the drive unit (4) or (4 ').
    [0094] • 2 pinion segments (11) (each one equipped with 2 different pins (12-12 '), 6 rollers (13) and 2 mounting clips (14),
    [0095] • 4 chain guide rollers (15) (each equipped with 1 pin (12), 4 rollers (13) and a mounting clip (14 ’),
    [0096] • 2 gear ratio adjusting bushings (21) with opposite outer grooves,
    [0097] • 2 bearings (13) installed between drive plates and adjusting plates.
    [0099] More specifically, and according to figure 4, the drive plates or discs (7) include curved grooves (8) along which all the pins (12-12'-12 ") of the segments sprocket (11) and chain guide rollers (15) can slide up and down. The slots are oriented towards the rear of the bicycle for the chain ring unit (4) and towards the front of the bicycle for the pinion unit (4 ').
    [0101] The drive plates (7) have a central section with a toothed hole (18) that engages the corresponding grooves of the front bottom bracket or the one-way freehub of the rear wheel axle.
    [0103] Said drive plates (7) are fixed in position by 2 side pressure rings, installed in transverse grooves cut in the front bottom bracket and in the one-way freehub of the rear axle.
    [0105] The drive plates will have cutouts (19) designed to minimize weight, without affecting the minimum necessary rigidity of the assembly.
    [0107] For their part, the adjustment plates or discs (9) have curved grooves (10) along which only the rolled long pins (12-12 '') of the pinion segments (11) and guide rollers (15 ) of the chain can slide within it depending on the movement of the arms that participate in the control links (2). Similarly, the slots are facing towards the front of the bicycle on the chain ring unit and towards the rear of the bicycle for the sprocket unit.
    [0108] The adjusting plates (9) have a central hole with slanted grooves (19) that engage with the outer grooves of the adjusting bushings (22).
    [0110] The outer side of the central section is designed as a support or shoulder (27) to support rollers (16) of trapezoidal section and that allows adjustment of adjustment during radial movement in relation to the hub.
    [0112] The adjustment plates (9) will have cutouts (20) designed to minimize weight, without affecting the rigidity necessary for the assembly.
    [0114] The 2 pinion segments (11) have a configuration such that, together with the 4 chain guide rollers (15), they complete the shape of the pinion in the minimum diameter provided for the transmission, as shown in figure 6, so that When pulling the cable (1) the 2 sprocket segments (11) and the 4 chain guide rollers (15) will progressively separate, maintaining a ring distribution, so that the chain adapts to this progressive increase in sprocket diameter or variable plate that determine the ring (4) or pinion (4 ') unit.
    [0116] As previously stated, each pinion segment (11) has a long top pin (12) that engages the curved slots (8-10) of the drive plates (7) and adjusting plates ( 9) and a short lower pin (12 ') that engages only with the slots (8) in the drive plates (7), to prevent rotation when the chain is in tension.
    [0118] Each chain guide roller (15) has a long pin (12 '') that engages with the curved grooves (8-10) of the drive plates (7) and adjusting plates (9).
    [0120] Each long pin (12, 12 ”) has 4 rollers (13) in total, 2 for each side of the sprocket segments (11) or the chain guide rollers (15).
    [0122] Each short pin (12 ') has 2 rollers (13), one for each side of the pinion segment (11).
    [0124] Each dowel is installed during assembly and secured with a mounting clip (14-14 ').
    [0125] Each roller (13) provides exact contact with minimal friction between the pins (on the inside) and the edges of the curved grooves (on the outside).
    [0127] As for the chain guide rollers (15), these have the outer shape designed to accommodate the shape of the chain and a center bearing or, if not possible, a frictionless bushing that connects it to the pin (12 '' ).
    [0129] For their part, the adjustment bushings (21) have external inclined grooves (22) to engage with the corresponding grooves (19) of the centers of the adjustment plates (9) and internal longitudinal grooves (23) to engage with the grooves corresponding to the front pedal axle and, respectively, with the free one-way hub (24) of the rear wheel axle.
    [0131] The orientation of the slanted outer grooves is opposite between the left side bushing and the right side bushing so that, during chain loading, it will cause the bushings to slide towards the adjusting plates, as long as there is no tension on the cable (1).
    [0133] Thus, as previously mentioned, the slip distance for the adjusting bushings, with tension on the transmission, is controlled by moving the adjusting rollers up or down, relative to the center of the hub.
    [0135] The adjusting bushing hinge bearing has a sloped outer edge (28), at an angle calculated to provide optimal frictionless engagement with the tapered edge of the adjusting rollers.
    [0137] As for the bearings (13), these are designed to reduce or eliminate friction, while loaded, between the drive plates and the adjustment plates.
    [0139] For their part, the adjusting rollers (16) have a central bearing or, if this is not possible, a low friction bushing and a sloping outer edge, in order to provide an optimal and frictionless engagement with the bearings of the bushings. adjusting plate (28) and adjusting plate hubs (27).
    [0140] The adjusting rollers (16) are installed on the interconnected ratio control links (2-2 '), so that when the adjusting rollers of the chain ring drive unit are changing their position relative to the center from the hub, the rollers on the pinion drive unit will change their position in the opposite direction, by a corresponding amount allowed by the length of the chain.
    [0142] There are a total of 8 interconnected ratio control links (for a transmission that allows regulating the actuation radius of the two axes chain) or 6 (for the most basic version), with 4 or 3 of them on each side of the drive unit.
    [0144] As shown in Figures 1 and 9 to 11, the double transmission has 4 links (2-2 ') on each side, interconnected as follows:
    [0146] • 2 directly connected links (2), of which one is installed on the top of the adjusting bushing in the chain ring unit and the other on the bottom of the adjusting bushing of the sprocket unit. The connection between these links is made directly by means of a pin (25) that allows them to pivot in relation to the others;
    [0147] • 2 indirectly connected links (2 '), of which one is installed on the bottom of the adjusting bushing in the chain ring unit and the other on the top of the adjusting bushing in the sprocket unit. The connection between these links is made indirectly by a bolt (26) that can slide along the longitudinal grooves present in each link, at the same time allowing them to move relative to one another.
    [0149] The basic transmission will only have one link (2) on each side of the chain ring or sprocket, depending on the location of the drive unit. Each link will have a center bearing for frictionless connection to the shaft and will connect with the two corresponding links on the drive unit.
    [0151] The pins (25, 26) of the interconnected links will be supplied with rollers, in order to reduce friction with the couplings and wear.
    [0153] The pin (25) of the directly connected links is directly connected with the indirectly connected link bolt (26), thus allowing the driver to rotate them and control the position of the ratio adjustment rollers.
    [0155] On each side of the drive units, each end of the directly connected link (2) is attached to the corresponding end of the indirectly connected link (2 '), using the pin of one of the ratio adjustment rollers.
    [0157] This roller pin functions as a pivot and allows the interconnected links (2-2 ') to pivot relative to each other and move the adjusting rollers (16) up or down between the shoulders (27) of the axle shaft. adjusting plate (9) and flange (28) of adjusting bushings (21).
    [0159] Each of the 2 remaining rollers for each side of the drive or adjustment unit are directly attached to the corresponding link (2), by means of a pin / dowel.
    [0161] The one-way freewheel rear axle hub (24) is designed to allow installation of the drive unit on the rear wheel axle.
    [0163] The left side outer edge of the hub has a ratchet mechanism, shown in Figure 12, that allows one-way engagement with the rear wheel axle and can be designed for different types of wheel hubs.
    [0165] From this structuring, the pinion segments (11), while there is tension in the cable (1), tend to slide outwards, along the curved grooves of the drive plates.
    [0167] Due to its toothed engagement with the chain, the only situation when the segments can slide along the curved grooves is when the rear segment is disconnected from the chain, during the disconnection phase by the chain ring unit and vice versa by the chain ring unit. pinion drive.
    [0169] The chain guide rollers (15), while tensioned by the chain, tend to move inward, along the curved grooves of the drive plates, due to free engagement with the chain.
    [0170] To avoid general collapse while loading toward the center of the drive unit, the long pins (12-12 ”) of the sprocket segments (11) and the chain guide rollers (15) are held in an exact circular position, in the intersection between the curved grooves of the drive plates (7) and the adjusting plates (9).
    [0172] The exact position of the actuating plates (7) in relation to the adjusting plates (9) is controlled by moving the adjusting bushings (21) closer or farther relative to the plates, through actuation of the links interconnected (2-2 ') and consequently of the adjustment rollers (16).
    [0174] Due to the design of the interconnected links (2-2 '), the amount of travel allowed for the adjusting bushings (21) of the chain ring unit will cause a similar amount of travel in the opposite direction for the adjusting bushings of the pinion unit and vice versa, in order to keep the chain taut at all times.
    [0176] The position of the sprocket segments (11) and the chain guide rollers (15) can only be corrected during the disconnection phase, when the sprocket segments disconnected from the chain will be able to slide along the curved grooves.
    [0178] This position can be constantly adjusted with each turn of the bicycle pedals.
    [0180] The connection of the interconnected links is intended to cause the voltages produced by the drive units while charging to cancel each other out, thus reducing the effort required by the driver to make adjustments.
    [0182] The curved grooves (8) of the drive plates (7) are formed to facilitate the ascent of the pinions (11) while loading, based on the mechanical wedge principle. While loading, the upward tendency of the sprocket segments will partially offset the tendency of the chain guide rollers to collapse toward the center of the drive unit.
    [0184] The rest of the effort to maintain the position of the chain guide rollers will be provided by adjusting plates, which are actuated by the driver through adjusting bushings and adjusting rollers of the interconnected links.
    [0185] The shape of the curved grooves (8) of the drive plate (7) was established based on the worst-case scenario when, while loading, a pinion segment and the next chain guide roller of the chain ring unit, at a maximum diameter, are aligned with a chain guide roller and the next roller or pinion segment of the pinion unit, at a minimum diameter and vice versa.
    [0187] The shape of the curved grooves (8) in the drive plate (7) was determined empirically, starting from the center of the plate, for each 5mm increments of the chain ring or sprocket diameter.
    [0189] The wedge angle is the angle between the perpendicular to the line created by the sprocket segments and the worst case aligned guides and the local surface of the curved groove (8-10), measured towards the tensioned part of the chain.
    [0191] A higher wedge angle value creates a stronger upward trend of the sprocket segments, thus compensating more for the collapse tendency of the chain guide rollers.
    [0193] The shape of the curved slots (10) of the adjusting plate (9) is designed to be locally perpendicular to the shape of the curved slots of the drive plate, for better efficiency.
    [0195] The shape of the curved grooves (10) of the adjusting plate (9) was determined empirically, starting from the center of the plate, for each 5 mm increments of the diameter of the chain ring or sprocket.
    [0197] According to the empirical determination of the curved grooves, in order to maximize efficiency while reducing the overall thickness of the drive unit, the value of the wedge angle needs to be as high as constructively possible.
    [0199] The transmission can be simplified for use on flat terrain, using only one drive unit paired with a corresponding chain ring or sprocket, a chain take-up kit (to take excess chain) and a simplified interconnected link system, which controls only the drive unit.
    权利要求:
    Claims (24)
    [1]
    1a.-Transmission mechanism of linear variation, in which a driving axle and a tractor axle participate, including means for regulating the transmission ratio between one axle and another transmitted through a chain, whether applied on an axis, on the other or on both, characterized in that said means are embodied in at least one drive unit (4-4 '), operable through a control cable (1), which acts on a series of arms or control links (2-2 '), associated with a plurality of adjustment rollers (16), of trapezoidal section, whose wedge-like apex is intended to move radially between the flange (28) of an adjustment bushing (21 ) and an outer shoulder (27) or flange on which an adjustment disk or plate (9) is finished, said adjustment sleeve (21) being axially displaceable both with respect to the hub (24) or transmission bottom bracket, as well as of the adjusting plate (9), by means of ribs and complementary holes ios, which make them integral in their turning movement, adjusting sleeve (21) which, in the inoperative situation of the control cable (1) and consequently of the adjusting rollers (16), tends to press against the adjusting plates (9) and consequently the drive plates (7), integral with the bottom bracket or hub (24), with the particularity that the adjustment plates (9) have the teeth of their central hole (19) inclined, so that the axial displacement of the adjustment bush (21) causes a relative angular displacement of said adjustment plate (9) with respect to the actuating plate (7), it being provided that both plates have matched curved grooves (8-10) in inoperative situation of the adjustment rollers (16), so that the mechanism has a symmetrical structure, in which two adjustment plates, two drive plates and two adjustment bushes (21) participate, the latter driven by the corresponding adjustment rollers (16) associated with the control arms or links (2-2 '), so that each pair of plates are linked together through a pair of pinion segments (11) and four guide rollers (15) for the chain, all through pins (12-12'-12 ”) movable on the slots (8-10).
    [2]
    2. Linear variation transmission mechanism, according to claim 1, characterized in that it is integrated in a casing (5), associated with the cable (1), partially filled with lubricating oil.
    [3]
    3.- Transmission mechanism of linear variation, according to claim 1, characterized because it includes a drive unit with a variable size chain ring (4) installed on the bottom bracket or a drive unit with a variable size sprocket (4 ') installed on the drive wheel axle, or a combination of both (4 4 '), in order to control the speed ratio of the traction wheel of the bicycle.
    [4]
    4. Linear variation transmission mechanism, according to claim 1, characterized in that when the mechanism includes a single drive unit (4 or 4 '), the mechanism is complemented with a chain tensioner.
    [5]
    5. Linear variation transmission mechanism, according to claim 1, characterized in that when the mechanism uses two drive units (4 4 '), the chain is functionally tensioned.
    [6]
    6.- Transmission mechanism of linear variation, according to claim 1, characterized in that each drive unit (4- or (4 ') is built symmetrically in relation to the chain ring or pinion starting from the center, as follows :
    • a drive plate (7) which is juxtaposed on the outside with an adjusting plate (9) so that the curved slots (8-10) intersect on the long bolts (12-12 "), on either side of the chain / sprocket ring;
    • 2 pinion segments (11) (each equipped with a long pin (12) which has 2 rollers (13) on each side of the segment and a mounting clip (14), and a short pin (12 ') which has a roller (13) on each side of the segment and a mounting clip (14)),
    • 4 chain guide rollers (15) (each equipped with 1 long pin (12 ”), two rollers (13) on each side of the chain guide roller and a mounting clip (14 '), • 2 adjusting bushings (21) of the gear ratio with the opposite slanted outer grooves, each located on either side of the chain / sprocket ring; • 2 bearings (13) installed between the drive plates (7) and the adjusting plates (9) .
    • 3 adjusting rollers (16) with sloping outer edge that engage the sloping outer edge of the adjusting bushing (28), on each side of the chain / sprocket ring; • one directly connected link (2) and one indirectly connected link (2 '), on each side of the chain-ring / pinion. The ends of the links (2) and (2 ') are connected by the pin of an adjustment roller (16) and can pivot in relation to each other;
    •
    [7]
    7. Linear variation transmission mechanism, according to claim 6, characterized in that the curved grooves (8-10) have opposite orientations depending on whether the drive unit is applied on the bottom bracket or on the hub of the traction wheel, so that the grooves (8) are oriented towards the rear of the bicycle for when applied to the bottom bracket and towards the front when applied to the drive wheel hub. Similarly, the slots (10) are oriented towards the front of the bicycle on the bottom bracket and towards the rear of the bicycle for the traction wheel unit.
    [8]
    8. Linear variation transmission mechanism, according to claim 6, characterized in that the drive plates (7) are fixed in position by means of two lateral pressure rings, installed in transverse grooves cut in the front bottom bracket or in the hub ( 24) from the drive wheel axle. The plates (7) are connected directly to the bottom bracket or hub (24) by means of slots cut in the central opening (18).
    [9]
    9. Linear variation transmission mechanism, according to claim 6, characterized in that the drive plates (7) include cutouts (19) to reduce weight.
    [10]
    10. Linear variation transmission mechanism, according to claim 6, characterized in that the adjustment plates (9) include cutouts (20) to reduce the weight, having provided that said adjustment plates (9) are directly connected to the outer grooves adjustment bushing (22) by means of corresponding inclined grooves cut in the central shaft (19), while the outer side of the central section is designed as a shoulder (27) to support the rollers (16) of trapezoidal section during radial movement relative to the hub.
    [11]
    11. Linear variation transmission mechanism, according to claim 6, characterized in that each of the two pinion segments (11) is followed by two chain guide rollers (15) and have a configuration such that, together with the 4 guide rollers chain (15), complete the shape of the pinion in the minimum diameter foreseen for the transmission (Fig. 6).
    [12]
    12a - Linear variation transmission mechanism, according to claim 6, characterized in that the size of the chain ring and / or pinion can be adjusted by controlling the exact position of the pinion segments (11) and the chain guides (15) in the intersection of the corresponding curved grooves (8) and (10), through the rotation of the adjusting plates (9) relative to the actuating plates (7), caused by axial movement of the adjusting bushings (21 ) in the opposite direction.
    [13]
    13. Linear variation transmission mechanism according to claim 6, characterized in that each pinion segment (11) has a long upper pin (12) that is linked to the curved grooves (8-10) of the drive plates (7 ) and the adjusting plates (9) and a short lower pin (12 ') that engages only with the slots (8) in the drive plates (7).
    [14]
    14. Linear variation transmission mechanism, according to claim 6, characterized in that each chain guide roller (15) has a long pin (12 '') that engages with the curved grooves (8-10) of the drive plates ( 7) and adjusting plates (9).
    [15]
    15. Linear variation transmission mechanism, according to claim 4, characterized in that each long pin (12-12 ") has four rollers (13) in total, two for each side of the pinion segments (11) or the guide rollers chain (15).
    [16]
    16. Linear variation transmission mechanism, according to claim 4, characterized in that each short pin (12 ') has two rollers (13), one for each side of the pinion segment (11).
    [17]
    17a.- Linear variation transmission mechanism, according to claim 1, characterized in that the adjusting rollers (16) have a central bearing or a low friction bushing and an inclined outer edge, which engages the edge (28) of the adjusting bushing (twenty-one).
    [18]
    18. Linear variation transmission mechanism, according to claim 1, characterized in that it includes eight control links (2 -2 ') for a transmission with two control units. drive (4-4 ').
    [19]
    19. Linear variation transmission mechanism, according to claim 1, characterized in that it includes six control links for a transmission with a drive unit (4 or 4 '), two links (2) and a link
    [20]
    20a - Transmission mechanism of linear variation, according to claim 6, characterized in that the adjustment bushings (21) with inclined outer grooves (22) that engage with the corresponding inner grooves of the adjustment plates (19) and with longitudinal grooves (23 ) that engages with the grooves of the bottom bracket or hub (24), allow the adjustment plates (9) to rotate in relation to the drive plates (7) and the bottom bracket or the hub (24), having provided that the orientation of the slanted outer grooves is opposite between the left side bushing and the right side bushing so that during chain loading it will cause the bushings to slide towards the adjusting plates, as long as there is no tension on the cable (1); with the particularity that the articulated support of the adjusting bushing has a sloping outer edge (28), at an angle calculated to offer an optimal and frictionless coupling with the sloping edge of the adjusting rollers (16).
    [21]
    21a - Transmission mechanism of linear variation, according to claim 1, characterized in that the control links (2-2 ') are interconnected so that the amount of travel allowed for the adjustment bushings (21) of the chain ring unit causes a similar amount of travel in the opposite direction for the pinion unit adjusting bushings and vice versa, involving:
    - Two directly connected links (2), one of which is installed on the upper part of the adjusting bushing in the chain ring unit and the other on the lower part of the adjusting bushing of the sprocket unit, having provided that the connection between these links is made directly by means of a pin (25) that allows them to pivot;
    - Two indirectly connected links (2 '), one of which is installed on the bottom of the adjusting bushing in the chain ring unit and the other on the top of the adjusting bushing in the sprocket unit, where the connection between these links is made indirectly by a bolt (26) that can slide along the longitudinal grooves (3 ') present in each link, at the same time allowing them to move relative to one another;
    - The links (2 ') are installed through an opening in the links (2) near the end connected with the pin (25), in the drive unit by a mechanism (4 4') or the unit (2 ”) by a mechanism (4) or (4 '),
    - The pins (25-26) of the interconnected links will be supplied with rollers;
    - The bolt (25) of the directly connected links (2) is directly connected with the bolt (26) of the indirectly connected links (2 '), thus allowing the driver to rotate them by adjusting the cable (1) and control the position of the adjusting rollers (16) relative to the adjusting bushings (21);
    - On each side of the drive units, each end of the directly connected link (2) is attached to the corresponding end of the indirectly connected link (2 '), using the pin of one of the adjusting rollers (16).
    [22]
    22a - Linear variation transmission mechanism, according to claim 1, characterized in that the shape of the curved grooves (10) of the adjustment plate (9) is designed to be locally perpendicular to the shape of the curved grooves (8) of the drive plate (7).
    [23]
    23a - Linear variation transmission mechanism, according to claim 1, characterized in that the one-way free rear axle hub (24) includes means for installing the drive unit on the rear wheel axle, having provided that the edge The outer left side of the hub has a ratchet mechanism, which allows a one-way engagement with the rear wheel axle.
    [24]
    24a.- Linear variation transmission mechanism, according to claim 1, characterized in that the transmission is equipped with a central recess (6).
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    同族专利:
    公开号 | 公开日
    ES2784073B2|2021-06-25|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3402942A|1966-06-17|1968-09-24|Shimano Industrial Co|Device for tensioning the driving chain in a bicycle equipped with coaster brake and exposed speed change gear|
    JPS59102680A|1982-12-03|1984-06-13|Waichirou Ishida|Non-step transmission for bicycle|
    US4684143A|1985-04-05|1987-08-04|Yasunori Sato|Two-wheeled vehicle with hydraulic transmission|
    WO2006049366A1|2004-11-08|2006-05-11|Tae-Ho Maeng|Chainless power transmission|
    US20110062678A1|2009-09-14|2011-03-17|Chen yuan-hai|Chainless bicycle drive system with speed change arrangement|
    WO2017179750A1|2016-04-14|2017-10-19|조광희|Chainless bicycle|
    法律状态:
    2020-09-21| BA2A| Patent application published|Ref document number: 2784073 Country of ref document: ES Kind code of ref document: A1 Effective date: 20200921 |
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    申请号 | 申请日 | 专利标题
    ES201930248A|ES2784073B2|2019-03-19|2019-03-19|Linear variation transmission mechanism|ES201930248A| ES2784073B2|2019-03-19|2019-03-19|Linear variation transmission mechanism|
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