• 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:
    The present invention relates to a bicycle bottom bracket preload device, which is placed in the support frame (2) of the lower frame (1) of a bicycle with side cranks (3 and 31), and comprises an outer sleeve (7), which protects the assembly and helps withstand the stresses requested to the bicycle frame, where the outer part of the outer bushing (7) has a stop projection (11) and on the other side it forms a tightening zone (15), angular contact bearings (9 and 10), a spacer (21) with a factory preset axial clearance located between these bearings (9 and 10), a fixing nut (14) of the assembly and a preload ring (16) which is mounted on the same bottom bracket (12) as the device assembly, so that this preload ring (16) generates a pressure against the spacer (21) and the entire bottom bracket assembly in the Tighten what eliminates or reduces the gaps in this set. (Machine-translation by Google Translate, not legally binding)
    公开号:ES2725324A1
    申请号:ES201830290
    申请日:2018-03-23
    公开日:2019-09-23
    发明作者:Lou Javier Salvador
    申请人:Bikone Bearings S L；
    IPC主号:
    专利说明:

    [0001] Preload device for the bottom bracket of a bicycle
    [0002] Object of the invention
    [0003] The object of the present invention relates to a device that is placed on the bottom bracket of a bicycle in the lower support of the frame, which generates a preload on it, improving its efficiency and increasing its rigidity, for which it is composed of a outer bushing, another inner bushing that we will call spacer, angular contact bearings, a tightening nut of the assembly and a preload disk.
    [0004] Where the spacer houses the axis of transmission of the rotation of one pedal of the pedal to the other, and in its working position it is loaded predefined by means of the preload ring, which has a stop also predefined so that it keeps the assembly with a tension of controlled tightening, which avoids slacks, crunches and maximizes its performance.
    [0005] This invention has its field of application in the bicycle industry and its accessories.
    [0006] Background of the invention
    [0007] One of the main drawbacks in the operation of a bicycle are the mismatches of the game that exists between the support of the frame with the connecting rods and pedals, to the point that part of the power invested in pedaling is lost in these games and slacks. In addition, these slacks often generate noises, cracks. The solution to these clearances is usually a tight tightening of the side screws that usually hold the bottom bracket and the set of connecting rods, plate, etc., however, this tightening if excessive ends up blocking the bearings and the assembly.
    [0008] At present, different means and devices are known for achieving a tightening or loading of the bearings without blocking them, such as the one described in US2014157951 for "Self-locking bearing preload adjustment", whose preload adjustment of the connecting rod mechanism The crank of the bicycle is based on a ring with an outer body threaded on an inner one and placed on the bottom of the bottom bracket, so that when the outer body is rotated with respect to the inside, a longitudinal displacement occurs in the direction of the axis of rotation which compresses the bearing, entering it in load and adjusting the assembly. This device is adjusted from this threaded ring once mounted, so it requires a trained hand, in addition to incorporating a movable mechanical element and impacting on greater system maintenance. Another author is the one expressed in US20120260767 by "bicycle with bearing preload mechanism" where a preload mechanism of the crank-crank assembly of the bicycle is described and claimed, for which it employs a set system of coupled washers one on the other and linked to the axis of rotation and the bearing, so that the outer washer has threaded holes, equirradial or not, where small screws are threaded that impact on the surface of the inner washer causing its thrust and displacement along the axis, creating a pressure on the shaft and the bearing that generates the preload of the assembly.
    [0009] This mechanism, like the previous case, implies a certain amount of trained labor to achieve the preload of the assembly, since it has to adjust several radially arranged screws, so it is relatively easy for them not to be compensated between them, and a greater pressure is exerted for some points than for others of the bearing, causing greater efforts and unbalanced.
    [0010] On the other hand, in the patent, DE202015002660U1, for "Intermediate part and crank assembly" with priority of a Taiwanese patent, a spacer is described and claimed as a washer that is coaxially placed next to the bearing so that when exerting pressure on the set for tightening, this spacer is compressed elastically to avoid the play of the set. In this case the spacer transmits most of the load to the bearing on which it acts, subjecting it to greater axial stresses.
    [0011] A variant used of the previous spacer is a warped washer that deforms its warping towards flatness, depending on the pressure exerted on the tightening, This type of warped washers is usually standardized so it is not possible to adapt the preload of the assembly to the physical characteristics of the user, since an excess of tightening, implies a greater rigidity of the set with less clearance, but in turn requires greater efforts to generate the movement of advance by increased friction between the different parts of the set.
    [0012] Description of the invention
    [0013] In order to provide a global solution to all the previously described drawbacks, a bicycle bottom bracket preload device is described below, which, when applied to the lower frame support, generates a load on the bicycle, eliminating gaps improving its efficiency and increasing its rigidity. This rigidity allows a better transmission of the movement from where it originates, in the pedals to the wheels, so that there is less power lost in the transmission and therefore increasing the performance of the assembly.
    [0014] This device consists of an outer bushing, another inner bushing that we will call a spacer with an axial clearance pre-set from the factory, angular contact bearings, a clamping nut of the assembly and a preload ring.
    [0015] Where the spacer that houses the transmission shaft of the rotation of one pedal rod to the other, in its working position is pre-loaded by means of the preload disk, which also has a pre-defined stop so that it keeps the assembly with a tension of controlled tightening, which avoids slacks, crunches and maximizes its performance.
    [0016] This predetermined preload ring is interchangeable with a different preload ring, so that it adjusts to the user's physical characteristics, since although a greater tightening implies a greater rigidity of the assembly with less power loss due to gaps, it is also necessary to have in mind that it implies a greater effort for the user. For this reason, this device allows to adapt the power of the user with the optimal conditions of the bicycle, since a preload ring can be exchanged for another of greater or lesser power depending on those conditions of the user.
    [0017] The device is placed concentrically between the support frame of the bicycle and the bottom bracket, so that the outer bushing protects the assembly and helps to withstand the stresses requested to the bicycle frame, such as the moments generated in each pedaling between the Drive pedal and bottom bracket, so the mechanical characteristics of this outer sleeve are of some flexibility to load part of these bending moments generated in the bicycle frame.
    [0018] The outer part of the outer bushing has a stop projection that locates the support frame in its specific position by contact and closing the whole of the device by means of a fixing nut to the frame, for which the outer bushing externally or internally forms towards its end a tightening zone that will be threaded in the case of using a nut.
    [0019] In this way, the support frame of the bicycle frame is housed on one side, butt against the protrusion of the outer sleeve and on the other against the inner face of the fixing nut that will tighten the frame to avoid gaps and noise, the time you position it in a unique position.
    [0020] The ends of the outer sleeve are configured to accommodate two axially aligned bearings, which are adjusted to the bottom of the bottom bracket in order to allow the rotation of the pedal cranks in relation to the bicycle support frame. These bearings are preferably angular contact to support both lateral and longitudinal loads. That is, the axial distance between the bearings is preset by the configuration of the outer sleeve. The bearings can be equal symmetric or asymmetric if these bearings are not equal.
    [0021] On the other hand, the preload device object of the present invention, consists in its interior part of a spacer, which is located axially between the bearings, whose function is to come into contact with the bearing and absorb part of the load that receives this . Therefore, the material to be used for this spacer is rigid enough to keep the spacer-bearing assembly in constant contact and keep the bearings with a controlled load.
    [0022] The spacer contacts the bearings, normally the inner face of each bearing is in contact with the respective free end of the spacer, so that the contact is made with the entire surface of the circular crown of the spacer with the inner raceways of the bearings
    [0023] Once the assembly is loaded, that is, when the connecting rods are pressed to the bottom bracket assembly to consolidate it, the spacer deforms elastically in the direction of its axis absorbing part of this load and distributing it between the inner faces of the bearings in an equirradially distributed manner, so that this load is distributed more evenly between the balls of the bearing and allows these balls to be subjected to less effort extending their useful life.
    [0024] This redistribution of the loads in the bearing lengthens the useful life of these and ultimately the whole, so it reduces maintenance, since the bearings are a considerable point of maintenance, as well as the origin of problems due to noise generation.
    [0025] Another important element of this device is the preload ring, which is mounted on the same axis as the device assembly normally on the opposite side of the clamp, and consists of two facing discs, a disk linked to the connecting rod and the other disk to the bearing. Between both discs, a tared spring is located by default and whose preload ring adopts a stop in order to avoid overloading.
    [0026] Its operation is executed when, once placed in a ring, the bottom bracket is tightened from one of the nuts that fix the assembly between the connecting rods and the shaft, axially dragging the preload ring against the corresponding bearing, in such a way that when the inner disc of the preload ring comes into contact with the outer face of the bearing, the preload ring begins to compress its spring causing the assembly to tighten and the bearing to load.
    [0027] The displacement of the inner disk of the preload ring is controlled by a stop between the inner and outer disks, so that the deformation of the spring is limited by this stop, in this way the load on the bearing is controlled without reaching to your lock
    [0028] The function of this preload ring is to load the bottom bracket in a controlled manner, so that it allows a tightening of all its parts, avoiding slacks, noises, cracks, etc., and stiffening it, in order to transmit the as much power as possible from the pedals to the wheel, but whose tightening does not imply total or partial blockage of the bearing due to excessive tightening torque.
    [0029] While the spring of the preload ring is the one that limits and loads the assembly in a controlled way, it implies that the replacement of this preload ring with another one of greater or lesser spring power, will imply slight differences in the bicycle's running.
    [0030] This property allows the bicycle's gear to be adapted to the user's physical conditions, that is, if a preload ring of greater power is placed, it means that the pressure that can be exerted on the assembly in its tightening, means less gaps, noise, discomfort, etc., and therefore translates into a greater transfer of power from the pedals to the wheel with a smoother operation of the bicycle; However, this higher pressure on the bearings means a greater controlled resistance to the rotation of the bearings, so that the user's physical conditions must be significantly higher than the use of a preload disk with lower spring power.
    [0031] Therefore, the placement of a preload disk or another is determined by the user's conditions. The bearing is balanced by the distribution of forces on both sides, since on the outer side a preload is generated with the preload ring and on the inner side, part of this effort is absorbed by controlled elastic deformation of the spacer, which distributes it balanced between the inner race of both bearings and with a more equitable distribution of these forces on the ball bearings. The whole assembly is mounted inside the outer sleeve with an axial clearance preset from the beginning. This property allows the efforts of both tightening and loading of bearings, bushings and spacer is controlled according to the physical characteristics of the bicycle user, allowing him to adapt and deepen an evolution of the development in the practice of this sport.
    [0032] Its application is simple, once the spacer with the bearings is placed in their respective housing of the outer sleeve, the preload ring is mounted on the bottom bracket, between the connecting rod and the bottom bracket bearing; the outer bushing assembly is placed on the bottom bracket and the assembly is closed with the fixing nut in the tightening area.
    [0033] In this position, the bicycle support is housed between the upper projection of the outer bushing and the said fixing nut, in such a way that when the fastened axle is tightened on the threaded means, the assembly is closed axially in the direction of the axle. , until all the clearances of the mechanism disappear. At that time, the preload ring begins to load by compressing the spring between both discs, transmitting part of this load to the bearing and this to the spacer, which is confined between the inner faces of the bearings.
    [0034] The axial load received by the spacer is on the one hand transmitted to the bearing being partially distributed with the other bearing and another part of this load is partially absorbed by the spacer itself as a result of an elastic deformation.
    [0035] This axial load and displacement is limited by the stop of the preload ring, since the discs are approximated by deformation of the spring until it makes contact with this stop preventing the spring from continuing to deform.
    [0036] Upon entering the entire assembly in preload, the clearances are mostly eliminated and subjected to a preload, which is predetermined and according to the user's physical conditions.
    [0037] Advantages of the invention
    [0038] The use of the preload device of the bicycle bottom bracket object of the present invention provides a series of advantages in relation to what is known so far, such as:
    [0039] It does not require a specialized workforce for complex or delicate work, but its placement is as simple as the assembly of the lower frame of the bicycle itself.
    [0040] The adjustment and tightening of the set is perfectly predefined from the beginning, so it does not lead to over tightening or default.
    [0041] Simplification since the regulation of the load is carried out according to the preload ring used, depending on the user's physical conditions.
    [0042] Greater distribution of loads in the tightening between bearings, which is distributed in a more balanced way among all the balls of the bearings, which means a longer life in better conditions of these.
    [0043] Better distribution of the efforts in the use of the bicycle as a result of the outer bush absorbing part of the moments generated in the pedaling.
    [0044] All this leads to a longer life of the bottom bracket and with less maintenance
    [0045] The transmission of power from the pedals to the wheel is maximized by stiffening the bottom bracket to the limit determined by the user.
    [0046] Description of the figures
    [0047] To better understand the object of the present invention, a preferential practical embodiment thereof has been represented in the attached drawing,
    [0048] Figure -1- shows a sectional view of the preload device object of the present invention.
    [0049] Figure -2- shows a perspective view of a lower bicycle frame with the device of Figure 1. Figure -3- shows in detail a sectional view of the preload disk of Figure 2.
    [0050] Figure -4- shows a detail a sectional view of the assembly of the spacer in the assembly.
    [0051] Preferred Embodiment of the Invention
    [0052] The constitution and features of the invention may be better understood with the following description made with reference to the attached figures.
    [0053] In figures 1, the placement of the preloading device in relation to the lower frame (1) of the bicycle can be seen in detail, where, inside the support frame (2), an outer sleeve (7) is first distinguished which It disposes towards its ends two separate housings (8 and 81) for the respective bearings (9 and 10). In turn, the outer part of the outer sleeve (7) has a stop projection (11) that places the support frame (2) in its specific position and closing the whole of the device by means of a fixing nut (14) to the frame , for which the outer sleeve (7) externally forms towards its end a tightening zone (15, see figure 4), which will be threaded in the case of using a nut.
    [0054] In this way, the support frame (2) of the bicycle frame is housed on one side butting against the abutment projection (11) of the outer bushing (7) and on the other against the inner face of the fixing nut (14 ) which will tighten the frame to avoid gaps and noise, while positioning it in a unique position.
    [0055] These bearings (9 and 10) can be equal symmetric or asymmetric if these bearings are not equal. Preferably these bearings are ball and angular contact to support both lateral and longitudinal loads and whose inner diameter fits the bottom bracket (12), which joins both connecting rods (3 and 31) and tightened by means of a threaded element ( 13), whether this is a nut or screw, depending on the shaft (12). Figure 2 shows a practical situation of the location of the device object of the invention in a lower frame (1) of bicycle, with a support frame (2), linked to a side rod on one side (3) and another rod (31) on the other side, with their respective pedals (4, and 41) and a toothed plate (5) for the placement of the chain of transmission to the rear wheel - not represented in the drawing. All this, rotating around the axis of rotation (6).
    [0056] On the other hand, in figure 3 a preload ring (16) normally placed in the opposite part to the tightening of the threaded element (13), which preferably consists of two facing discs, a disk ( 17) linked to the connecting rod (31) and the other disc (18) to the bearing (81). Between both discs (17 and 18) a spring (19) is located tared by default and whose preload ring (16) adopts a stop (20) in order to avoid overloading.
    [0057] Likewise, in figure 4 part of the assembled assembly is observed, with a first outer bushing (7) that houses inside a spacer (21) that connects the respective bearings (9 and 10) on both ends of the spacer, in such a way that the contact is made with the entire surface of the circular crown of the spacer (21) with the inner raceways of the bearings (9 and 10). In this way, the loading pressure is distributed between both bearings and distributed evenly between the balls of the bearing, which allows these balls to be subjected to less effort and lengthening their useful life.
    [0058] The operation is simple, for this, the spacer (21) with the bearings (9 and 10) is placed in their respective housing (8, 81) of the outer bushing (7). The preload ring (16) is mounted on the bottom bracket (12) between the connecting rod (31) and the bearing (81) of the bottom bracket; the spacer (21) is placed on the bottom bracket (12) and the assembly is closed with the fixing nut (14) placed in the tightening area (15).
    [0059] In this position, the support (2) of the frame (1) of the bicycle is housed between the abutment projection (11) of the outer bushing (7) and said fixing nut (14), in such a way that when it is tightened on the threaded elements (13) the assembly is closed axially in the direction of the shaft (6), until all the clearances of the mechanism disappear. At that time, the preload ring (16) begins to load by compressing the spring (19) between both discs (17 and 18), transmitting part of this load to the bearing (10) and this to the spacer (21), the which is confined between the inner faces of the bearings (9 and 10).
    [0060] The axial load received by the spacer (21) is on one side transmitted to the bearing (9) being partially distributed with the bearing (10) and another part of this load is partially absorbed by the spacer itself (21) as a result of a elastic deformation
    [0061] This axial load and displacement is limited by the stop (20) of the preload ring (16), since the discs (17 and 18) are approximated by deformation of the spring (19) until contact is made with this stop (20) preventing continue deforming the spring (19).
    [0062] Upon entering the entire assembly in preload, the clearances are mostly eliminated and subjected to a preload, which is predetermined and according to the user's physical conditions.
    权利要求:
    Claims (4)
    [1]
    1.- Preloading device of the bottom bracket of a bicycle , which is intended for bicycles with a support frame (2) of the lower frame (1) of bicycle with side cranks (3 and 31), with their respective pedals (4, and 41) and a toothed plate (5) for the placement of the chain of transmission to the rear wheel, characterized by comprising:
    an outer bushing (7), and which protects the assembly and helps to withstand the stresses requested to the frame (1) of the bicycle, where the outer part of the outer bushing (7) has a stop projection (11) which places contact to the support (2) bottom bracket, and on the other hand it forms towards its end a tightening zone (15), a spacer (21) that is located between the bearings (9 and 10), with an axial clearance predetermined from the factory, angular contact bearings (9 and 10),
    a fixing nut (14) of the assembly and
    a preload ring (16) which is mounted on the same bottom bracket (12) as the device assembly normally on the opposite side to the tightening of the threaded element (13), and consists of two facing discs, a disk (17) linked to the connecting rod (31) and the other disc (18) to the bearing (10); Between both discs a spring (19) is located tared by default,
    [2]
    2 - Preloading device of the bottom bracket of a bicycle , according to claim one, characterized in that the spacer (21) is brought into contact with the bearings (9 and 10) when the assembly is loaded, leaving the inner face of each bearing ( 9 and 10) in contact with the respective end of the spacer (21), so that the contact is made with the entire surface of the circular crown of the spacer (21) with the inner raceways of the bearings (9 and 10).
    [3]
    3 - Preloading device of the bottom bracket of a bicycle , according to the preceding claim , characterized in that the spacer (21) distributes the load between the internal faces of these bearings (9 and 10) in an equirradial manner.
    [4]
    4 .- Preloading device of the bottom bracket of a bicycle , according to the preceding claim, characterized in that the spacer (21) is elastically deformable in the direction of its axis (6) when the connecting rods (3, 31) are pressed to the bottom bracket, absorbing part of this load.
    5 - Preloading device of the bottom bracket of a bicycle , according to claim one, characterized in that the preloading ring (16) has a stop (20) between the discs (17 and 18), which limits the displacement of a disc towards the other and therefore of the deformation of the spring (19).
    6 - Preloading device of the bottom bracket of a bicycle , according to previous claims, characterized in that , the support (2) of the bicycle, is positioned between the abutment boss (11) of the outer bushing (7) and the fixing nut (14 ), and the entire bottom bracket assembly subjected to a load from the pressure exerted by the preload ring (16) and the spacer (21) on the bearings (9 and 10) when tightening on the threaded elements (13) of the bottom bracket (12).
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    同族专利:
    公开号 | 公开日
    ES2725324B2|2020-01-27|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4424981A|1982-01-25|1984-01-10|Maxwell Iii William H|High strength light weight bike axle|
    US5597242A|1995-08-25|1997-01-28|Dia-Compe, U.S.A., Inc.|Bicycle hub with bearing preload adjuster|
    US7073996B1|2003-03-03|2006-07-11|Hernandez Eduardo A|Two-piece crank hanger set for bicycles|
    US20140157951A1|2012-12-06|2014-06-12|The Hive Global, Inc.|Self locking bearing preload adjuster|
    法律状态:
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    优先权:
    申请号 | 申请日 | 专利标题
    ES201830290A|ES2725324B2|2018-03-23|2018-03-23|DEVICE FOR PRECAUTION OF THE PEDALIER OF A BICYCLE|ES201830290A| ES2725324B2|2018-03-23|2018-03-23|DEVICE FOR PRECAUTION OF THE PEDALIER OF A BICYCLE|
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