JP2006001546A - Hub for bicycle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bicycle hub for easily adjusting the ball contact and locking a ball pusher. <P>SOLUTION: A hub shaft 10 is attached to a frame in a non-rotatable manner, and provided with a male screw part 16a and a first locking part formed to be adjacent to the outside of the male screw part in the axial direction. The hub shell 11 has a pair of right and left first and second hub flanges 11a, 11b. First and second bearings 13, 14 comprise first and second ball receivers 31, 34 provided on the hub shell, a first ball pusher 32 having a female screw part 32a screwed to the hub shaft and a second locking part 32b, a second ball pusher 35 provided on the other end side of the hub shaft, and balls 33, 36. A rotation preventive member 15 prevents the first ball pusher of the hub shaft from rotating in regard to the hub shaft. The second locking part of the first ball pusher has a serration part formed in a circumferential direction on an outer peripheral surface, and a second engaging part of the rotation preventive member has a serration part formed to be engagaed with the serration part of the second locking part. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a bicycle hub, and more particularly, to a bicycle hub for rotatably mounting a wheel to a bicycle frame.

  A bicycle wheel is provided with a hub at the center of the wheel for rotatably mounting the wheel to the bicycle frame. A conventional hub includes a hub shaft that is non-rotatably mounted on a frame, a hub shell that is disposed on the outer peripheral side of the hub shaft, and a pair of left and right bearings that are disposed between the hub shaft and the hub shell. (For example, refer to Patent Document 1).

  Male screw portions are formed on the outer periphery at both ends of the hub shaft. On the outer periphery of the hub shell, a pair of left and right hub flanges are formed on which spokes for connecting to the wheel rim are locked. The bearing includes a ball receiver integrally or separately provided in the hub shell, a ball screw having a female screw portion that is screwed into a male screw portion of the hub shaft, and a ball screw screwed into the hub shaft, and between the ball receiver and the ball screw. And a plurality of balls mounted on the. The balls are mounted on a cage that is disposed at intervals in the circumferential direction, and are disposed between the claw and the ball receiver in a state of being mounted on the cage. The claw is prevented from rotating by a lock nut attached to the outside in the axial direction.

  The assembly operation of the conventional hub having such a structure is performed as follows.

First, when the hub shell is mounted on the hub shaft and the ball receiver is a separate body, the ball receiver is mounted on the hub shell. Then, the ball mounted on the cage is mounted on the ball receiver and grease is applied. When the ball is mounted, the ball is screwed in from the left and right sides of the hub shaft, and the hub shell is set on the hub shaft so as to be rotatable. At this time, the so-called ball contact adjustment is performed in which the axial position of the hub shell is adjusted and the pressing condition of the claw is adjusted. Finally, use a lock nut to prevent the ball from rotating.
Japanese Utility Model Publication No. 57-012301

  In the conventional configuration, since the ball contact must be adjusted by mounting the ball hits from both ends of the hub shaft, the ball contact adjustment becomes a troublesome work. In addition, since a lock nut is required to prevent rotation of the screwed ball, the work for preventing rotation is troublesome.

  An object of the present invention is to make it possible to easily perform an adjustment operation per ball and a rotation prevention operation of a ball press.

  A bicycle hub according to a first aspect of the present invention is a hub for rotatably mounting wheels on a bicycle frame, and includes a hub shaft, a hub shell, a pair of bearings, and a rotation preventing member. . The hub shaft is non-rotatably attached to the frame, and has a male screw portion and a first locking portion formed adjacent to the outer side in the axial direction of the male screw portion on one end side. The hub shell has a pair of left and right first and second hub flanges, and is disposed on the outer peripheral side of the hub shaft. The pair of bearings is disposed between the hub shell and the hub shaft, and includes a pair of left and right first and second ball supports provided on the hub shell, a female screw portion that engages with the male screw portion of the hub shaft, and a non-rotating mechanism. A first bead having a second locking portion for the purpose, a second bead provided on the other end side of the hub shaft so as not to rotate with respect to the hub shaft, and both the bead and the both ball receivers. It has a ball that rolls in contact with both. The rotation prevention member includes a plurality of first engagement portions that engage with the first engagement portion of the hub shaft in a non-rotatable manner in one or a plurality of rotational phases, It is a member that has a second engaging portion that engages in a non-rotatable manner at any one of the rotational phases of 1 on the inner peripheral side, and prevents the first bead from rotating about the hub axle. The second locking portion of the first bead has a first serration portion formed of a large number of irregularities on the outer peripheral surface in the circumferential direction, and the second engagement portion of the rotation preventing member is connected to the first serration portion. It has the 2nd serration part formed so that it might engage.

  When assembling the bicycle hub, first, when the second chamfer is a separate body, the second chamfer is fixed to the other end side of the hub shaft. When the ball receiver is a separate body, the ball receiver is attached to the hub shell. In this state, the ball is mounted on the second claw, and the hub shell is mounted from one end side of the hub shaft to the outer peripheral side of the hub shaft. This work is easy to perform if, for example, the hub axle is set up on one end side. When the hub shell is mounted, the ball is mounted on the first ball receiver, and the first ball press is screwed onto the hub shaft to perform the contact operation of the ball. When the adjustment operation for the ball contact is completed, the second serration portion of the second engagement portion is connected to the second engagement portion in a state where the first engagement portion of the detent member is aligned with the first engagement portion of the hub axle. The first engagement portion is in the first engagement state in a state in which the rotation phase of the first claw is adjusted or the second engagement portion of the anti-rotation member is aligned with the second engagement portion of the anti-rotation member so as to fit the one serration portion. The rotation phase of the hub shaft is adjusted so as to match with the stop portion, and the rotation preventing member is mounted so as not to rotate with respect to the hub shaft and the second claw. As a result, the first chamfer is prevented from rotating with respect to the hub shaft.

  Here, since the adjustment operation per ball can be performed only by turning the first bead, the adjustment operation for the ball contact is facilitated. Further, since the rotation of the first ball press can be prevented simply by mounting the rotation stopper in accordance with the rotation phase, the rotation prevention operation can be easily performed. Further, since the rotation is prevented by the serrations having a large number of irregularities, the rotational phase in which the two serrations mesh with each other increases, and the rotation prevention member can be attached to the first ball press as long as it does not affect the shaft rotation.

  A bicycle hub according to a second aspect of the invention is the hub according to the first aspect, wherein the rotation preventing member is a cylindrical member having a first inner peripheral surface and a second inner peripheral surface having a smaller diameter than the first inner peripheral surface. The first locking portion of the hub shaft has chamfered portions arranged parallel to each other on the outer peripheral surface at one end of the hub shaft, and the first engaging portions of the rotation preventing member are parallel to each other on the second inner peripheral surface. It has an oval slit formed. In this case, after mounting the anti-rotation member by aligning the slit of the anti-rotation member with the chamfered portion of the hub shaft, the first anti-rotation member is turned so that the second serration portion is aligned with the first serration portion. Is attached to the first bead, the first bead is prevented from rotating.

  A bicycle hub according to a third aspect of the present invention is the hub according to the first or second aspect, wherein the hub axle is hollow at least on the first end side, and is provided with a first shaft portion provided with the first and second crests, and a detent It has a collar part for preventing the member from coming off, and has a second shaft part screwed onto the inner peripheral surface at one end of the first shaft part. In this case, since the anti-rotation member can be prevented from being detached by the second shaft portion, it is not necessary to provide a structure for preventing the anti-retraction on the anti-rotation member.

  A bicycle hub according to a fourth aspect of the present invention is the hub according to any one of the first to third aspects, wherein the hub shaft is a hollow shaft through which a quick release mechanism that can be easily attached to and detached from the frame passes. In this case, the ball contact adjusting operation and the rotation stop adjusting operation of the hub having the quick release mechanism are facilitated.

  The bicycle hub according to a fifth aspect of the present invention is the hub according to any one of the first to fourth aspects, wherein the inner peripheral surface of the first chamfer is an inner peripheral surface at a portion adjacent to the inner side in the axial direction of the male screw portion of the hub shaft. Is press-fitted. In this case, since the first ball press is press-fitted, the first ball press is more difficult to turn.

  A bicycle hub according to a sixth aspect of the present invention is the hub according to any one of the first to fifth aspects, wherein the second chamfer is a separate member that is press-fitted and fixed to the hub shaft. In this case, since the second chamfer is a separate member, changing the material of the hub shaft can maintain high strength while reducing the weight.

  A bicycle hub according to a seventh aspect is the hub according to the fifth aspect, wherein the hub shaft is made of an aluminum alloy, and the first and second crests are made of an iron-based alloy. In this case, it is possible to maintain the wear resistance while reducing the weight by adopting the iron-based alloy only for the jabbing which is easily worn.

  A bicycle hub according to an eighth aspect of the present invention is the hub according to any one of the first to seventh aspects, wherein the hub axle is attached to a front fork of the bicycle. In this case, it is easy to adjust the contact of the hub of the front wheel and to prevent the rotation of the front wheel, which is particularly light in order to idle.

  According to the present invention, the ball contact adjusting operation can be performed simply by turning the first bead, and therefore the ball contact adjusting operation is facilitated. Further, since the rotation of the first ball press can be prevented simply by mounting the rotation stopper in accordance with the rotation phase, the rotation prevention operation can be easily performed. Further, since the rotation is prevented by the serrations having a large number of irregularities, the rotational phase in which the two serrations mesh with each other increases, and the rotation prevention member can be attached to the first ball press as long as it does not affect the shaft rotation.

  In FIG. 1, a bicycle 101 employing an embodiment of the present invention includes a frame 102 including a front fork 98, a handle 104 fixed to the front fork 98, a drive unit 105 made of a chain, pedal, derailleur, etc. Front and rear wheels 106 and 107 having spokes 99 attached to the front and rear of the frame 102 are provided.

  In FIG. 2, the front hub 1 has both ends of the hub shaft 10 fixed to both left and right front forks 98 by a known quick release mechanism 50 having a cam lever 51 and a nut 52, and spokes 99 are provided on both hub flanges 11a and 11b. It is fixed.

  The front hub 1 includes a hub shaft 10 fixed to the front fork 98, a hub shell 11 disposed on the outer peripheral side of the hub shaft 10, and first and second bearings disposed between the hub shaft 10 and the hub shell 11. 13 and 14, and a detent member 15 that prevents the first ball push 32 of the first bearing 13 from rotating with respect to the hub shaft 10.

  The hub shaft 10 is made of, for example, high strength A7075 aluminum alloy, and both ends thereof are fixed to the front end portion of the front fork 98 by the quick release mechanism 50. The hub shaft 10 has a quick release mechanism 50 extending therethrough, and has a hollow first shaft portion 16 and a hollow second shaft portion 17 that is screwed into the first shaft portion 16.

  The first shaft portion 16 is a shaft constituting most of the hub shaft 10, and both bearings 13 and 14 are mounted at both ends, and the second shaft portion 17 is screwed into one end (the left end in FIG. 2). ing. A male screw portion 16a is formed on the outer peripheral surface on one end side of the first shaft portion 16 to which the first ball push 32 of the first bearing 13 is screwed. A female screw on which the second shaft portion 17 is screwed on the inner peripheral surface of the first shaft portion 16. A portion 16b is formed. Moreover, the 1st latching | locking part 16g comprised by the chamfering part arrange | positioned in parallel mutually with which the rotation prevention member 15 is latched so that rotation is impossible is formed in the outer peripheral surface of one end.

  On the other end side of the first shaft portion 16, a press-fit portion 16c into which the second ball press 35 of the second bearing 14 is press-fitted and fixed, and a protrusion for positioning adjacent to the press-fit portion 16c in the axial direction outward 16d. Further, a small-diameter fork fixing portion 16e to which the front fork 98 is fixed is formed at the other end (right end in FIG. 3). A knurled portion 16f for preventing rotation with respect to the front fork 98 is formed on the end surface of the stepped portion with the fork fixing portion 16e with radial unevenness.

  The second shaft portion 17 is a cylindrical member having a smaller diameter than the first shaft portion 16, and a male screw portion 17 a that is screwed into the female screw portion 16 b of the first shaft portion 16 is formed on the outer peripheral surface of the right end of FIG. A small-diameter fork fixing portion 17b to which the front fork 98 is fixed is formed at the left end. A knurled portion 17c for preventing rotation with respect to the front fork 98 is formed on the end surface of the step portion with respect to the fork fixing portion 17b with radial unevenness. A large-diameter flange portion 17d is formed between the male screw portion 17a and the fork fixing portion 17b. The flange portion 17d is provided to prevent the rotation preventing member 15 from coming off. A tool locking portion 17e having six corners for rotation with a tool is formed on the inner peripheral surface on the one end side of the second shaft portion 17.

  The hub shell 11 is made of a relatively strong and lightweight aluminum alloy such as A6151, for example, and is a bilaterally symmetric cylindrical member with a narrowed central portion. Disk-shaped first and second hub flanges 11a and 11b are formed on the outer peripheral surface of the large diameter portion of the bab shell. For example, 16 spoke locking holes 11c and 11d are formed at equal intervals in the first and second hub flanges 11a and 11b at intervals in the circumferential direction. The spoke locking hole 11c and the spoke locking hole 11d are formed with a pitch shifted by a half pitch. At both ends of the hub shell 11, for example, synthetic resin cover members 20a and 20b for covering the gap with the hub shaft 10 are detachably mounted.

  As shown in FIGS. 3 and 4, the first bearing 13 includes a first ball receiver 31 provided on the hub shell 11, a first ball press 32 screwed into the hub shaft 10, a first ball press 32, Between the ball receiver 31, there is a ball 33 that rolls in contact with both.

  The first ball receiver 31 is a cylindrical member with an inner collar made of an iron alloy such as bearing steel, and is press-fitted and fixed to the inner peripheral surface of the large-diameter portion of the hub shell 11. A curved rolling surface 31 a with which the ball 33 comes into contact is formed on the inner peripheral surface of the first ball receiver 31.

  The first bead 32 is a cylindrical member made of an iron-based alloy such as bearing steel. The first claw 32 is engaged with the anti-rotation member 15 and is engaged with the internal thread portion 16a formed on the outer peripheral surface of the first shaft portion 16 of the hub shaft 10, and the second engagement. It has the stop part 32b and the press-fit fixing part 32c press-fitted in the axial direction inward of the external thread part 16a of the first shaft part 16. A curved rolling surface 32 d with which the ball 33 contacts is formed on the outer peripheral surface of the first ball pushing 32. The 2nd latching | locking part 32b is comprised by the serration part which consists of many unevenness formed in the circumferential direction on the outer peripheral surface of the 1st claw 32, and was formed.

  For example, eight balls 33 are arranged at equal intervals at intervals in the circumferential direction. The balls 33 are held at intervals by a cage (not shown) so as to roll freely. The ball 33 is filled with grease.

  As shown in FIG. 2, the second bearing 14 includes a second ball receiver 34 provided on the hub shell 11, a second ball bearing 35 fixed to the hub shaft 10, a second ball bearing 35 and a second ball bearing. 34 and a ball 36 that rolls in contact with both of them. The second ball receiver 34 is a member having the same shape and material as the first ball receiver 31. The second claw 35 is press-fitted and fixed to the press-fit portion 16 c of the first shaft portion 16 of the hub shaft 10. A curved rolling surface 35 a with which the ball 33 contacts is formed on the outer peripheral surface of the second claw 35. The second claw 35 is positioned by the protrusion 16d.

  The anti-rotation member 15 is a relatively strong and lightweight aluminum alloy member such as A6151. As shown in FIGS. 3 and 4, the rotation preventing member 15 is a cylindrical member having a first inner peripheral surface 15a and a second inner peripheral surface 15b having a smaller diameter than the first inner peripheral surface 15a. A first engaging portion 15c is formed on the peripheral surface 15b, and a second engaging portion 15d is formed on the first inner peripheral surface 15a. The first engaging portion 15c is non-rotatably locked to the first locking portion 16g of the first shaft portion 16 of the hub shaft 10, and is formed in parallel with each other on the second inner peripheral surface 15b. It consists of a circular slit. 15 d of 2nd engaging parts are comprised by the serration part which has many unevenness formed in the 1st internal peripheral surface 15a along with the circumferential direction so that it may engage with the serration part of the 2nd latching | locking part 32b. The anti-rotation member 15 is locked to the hub shaft 10 and the first bead 32 so as not to rotate, so that the first bead 32 can be prevented from rotating with respect to the hub shaft 10.

  Next, an assembling procedure of the front hub 1 configured as described above will be described. When the front hub 1 is assembled, first, the second claw 35 is press-fitted and fixed to the other end side of the hub shaft 10. Further, the ball receivers 31 and 34 are press-fitted and fixed from both ends of the hub shell 11. In this state, the ball 36 is mounted on the second claw 35 and the hub shell 11 is mounted from one end side of the first shaft portion 16 of the hub shaft 10 to the outer peripheral side. This operation can be easily performed if, for example, the first shaft portion 16 is erected on one end side.

  When the hub shell 11 is mounted, the ball 33 is mounted on the first ball receiver 31, and the first ball push 32 is screwed into the male screw portion 16 a of the first shaft portion 16 of the hub shaft 10 to adjust the contact with the ball. When the adjustment operation for the ball contact is completed, the second engagement portion 15d is in the state in which the first engagement portion 15c of the detent member 15 is aligned with the first engagement portion 16g of the first shaft portion 16 of the hub axle 10. The rotational phase of the first claw 32 is adjusted so as to fit the two locking portions 32b. At this time, since the second locking portion 32b and the second engaging portion 15d are composed of serration portions composed of a large number of projections and depressions, the rotational phase in which the two serration portions engage with each other increases and does not affect the shaft rotation. Thus, the anti-rotation member 15 can be mounted on the first ball press 32. As a result, the rotation preventing member 15 is mounted so as not to rotate with respect to the first shaft portion 16 and the first ball pushing 32 of the hub shaft 10, and the first ball pushing 32 is prevented from rotating with respect to the hub shaft 10.

  When these operations are completed, the cover members 20a and 20b are attached to both ends of the hub shell 11, and the second shaft portion 17 is attached to the first shaft portion 16 to prevent the rotation prevention member 15 from coming off. Finally, the quick release mechanism 50 is set through the through hole in the inner peripheral surface of the hub shaft 10. This completes the front hub.

  Here, since the adjustment operation per ball can be performed only by turning the first ball pressing 32 instead of the two ball pressings, the ball hitting adjustment operation is facilitated. Further, since the rotation of the first ball push 32 can be prevented simply by mounting the rotation preventing member 15 in accordance with the rotation phase, the rotation preventing operation can be easily performed.

Other Embodiment
(A) In the above-described embodiment, the inner and outer peripheral surfaces between the anti-rotation member 15 and the first bead 32 are engaged, but the end surfaces may be engaged with each other as shown in FIG. In FIG. 5, the first claw 132 has a second locking portion 132 b formed of a knurl portion formed radially on the end surface facing the anti-rotation member 115. The anti-rotation member 115 is a cylindrical member, and a first engagement portion (not shown) formed of a slit is formed on one end surface, and is formed radially on the other end surface opposite to the first bead 132. A second engaging portion 115d configured by the knurled portion is formed. Even with such an anti-rotation structure, the same effect as in the above embodiment can be obtained.

  (B) In the said embodiment, a 1st latching | locking part and a 2nd engagement part are engaged in two places of a rotation phase, and a 2nd latching part and a 2nd engagement part are many places of a rotation phase. Although engaged, the reverse is also possible. That is, the hub shaft and the rotation preventing member may be engaged at a plurality of locations in the rotational phase, and the rotation preventing member and the first bead may be engaged at two locations in the rotational phase.

  (C) Although the present invention is applied to the front hub in the embodiment, the present invention may be applied to the rear hub. Further, the form of the hub is not limited to the above-described embodiment, and the form of the hub shell may be any shape such as a split type composed of a plurality of members instead of an integrated type. Further, a brake adjustment mechanism or a power generation mechanism may be mounted in the hub.

The side view of the bicycle by which one Embodiment of this invention was employ | adopted. 1 is a half-sectional view of a front hub according to an embodiment of the present invention. FIG. The disassembled perspective view which shows a part of bearing. The figure equivalent to FIG. 3 of other embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front hub 10 Hub axis | shaft 11 Hub shell 11a, 11b Hub flange 13, 14 1st and 2nd bearing 15 Anti-rotation member 15a 1st internal peripheral surface 15b 2nd internal peripheral surface 15c 1st engaging part 15d 2nd engaging part 16 1st axis | shaft part 16a Male thread part 16b Female thread part 16g 1st latching | locking part 17 2nd axial part 17d ridge part 31,34 1st and 2nd ball receiver 32,35 1st and 2nd ball-pushing 32a Female thread part

Claims (8)

A bicycle hub for allowing wheels to be rotatably mounted on a bicycle frame;
A hub shaft which is non-rotatably attached to the frame and has a male screw portion and a first locking portion formed adjacent to the outer side in the axial direction of the male screw portion on one end side;
A hub shell having a pair of left and right first and second hub flanges and disposed on an outer peripheral side of the hub shaft;
A pair of left and right first and second ball rests disposed between the hub shell and the hub shaft and provided on the hub shell, a female screw portion screwed into the male screw portion of the hub shaft, and a detent Between a first bead having a second locking portion, a second bead non-rotatable with respect to the hub shaft on the other end side of the hub shaft, and both the bead and the both ball receivers A pair of bearings each having a ball that rolls in contact with the two;
A first engagement portion that is non-rotatably engaged with the first engagement portion of the hub shaft at any one or a plurality of rotational phases, and a plurality or one of the second engagement portions of the first bead. A second engaging portion that engages in a non-rotatable state at any of the rotation phases on the inner peripheral side, and includes a detent member that prevents the first bead from rotating with respect to the hub shaft,
The second locking portion of the first claw has a first serration portion composed of a number of irregularities formed in the circumferential direction on the outer peripheral surface,
The bicycle hub, wherein the second engagement portion of the rotation preventing member has a second serration portion formed to engage with the first serration portion. The anti-rotation member is a cylindrical member having a first inner peripheral surface and a second inner peripheral surface having a smaller diameter than the first inner peripheral surface,
The first locking portion of the hub shaft has chamfered portions arranged parallel to each other on the outer peripheral surface on one end side of the hub shaft,
2. The bicycle hub according to claim 1, wherein the first engaging portion of the detent member has oval slits formed in parallel to each other on the second inner peripheral surface. The hub axle is
A first shaft portion that is hollow at least on the first end side and is provided with the first and second chamfers;
3. The bicycle according to claim 1, further comprising: a collar portion for preventing the rotation-preventing member from coming off, and a second shaft portion screwed onto the inner peripheral surface of the first shaft portion. Hub.   The bicycle hub according to any one of claims 1 to 3, wherein the hub shaft is a hollow shaft through which a quick release mechanism that can be easily attached to and detached from the frame passes.   5. The bicycle hub according to claim 1, wherein the inner peripheral surface of the first chamfer is press-fitted into a portion adjacent to the inner side in the axial direction of the male screw portion of the hub shaft.   The bicycle hub according to any one of claims 1 to 5, wherein the second chamfer is a separate member press-fitted and fixed to the hub shaft. The hub shaft is made of an aluminum alloy,
The bicycle hub according to claim 6, wherein the first and second claw are made of an iron-based alloy.   The bicycle hub according to any one of claims 1 to 7, wherein the hub axle is attached to a bicycle front fork.

Images